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1. general description the nts0101 is a 1-bit, dual supply translat ing transceiver with auto direction sensing, that enables bidirectional voltage level translation. it features two 1-bit input-output ports (a and b), one output enable input (oe) and two supply pins (v cc(a) and v cc(b) ). v cc(a) can be supplied at any voltage between 1.65 v and 3.6 v. v cc(b) can be supplied at any voltage between 2.3 v and 5.5 v. this flexibility makes the devi ce suitable for translating between any of the voltage nodes (1.8 v, 2.5 v, 3.3 v and 5.0 v). pins a and oe are referenced to v cc(a) and pin b is referenced to v cc(b) . a low level at pin oe causes the outputs to assume a high-impedance off-state. this device is fully specified for partial power-down applications using i off . the i off circuitry disables th e output, preventing the damaging backflow current through the device when it is powered down. 2. features and benefits ? wide supply voltage range: ? v cc(a) : 1.65 v to 3.6 v and v cc(b) : 2.3 v to 5.5 v ? maximum data rates: ? push-pull: 50 mbps ? i off circuitry provides partial power-down mode operation ? inputs accept voltages up to 5.5 v ? esd protection: ? hbm jesd22-a114e class 2 exceeds 2500 v for a port ? hbm jesd22-a114e class 3b exceeds 8000 v for b port ? mm jesd22-a115-a exceeds 200 v ? cdm jesd22-c101e exceeds 1500 v ? latch-up performance exceeds 100 ma per jesd 78b class ii ? multiple package options ? specified from ? 40 ? cto+85 ? c and ? 40 ? cto+125 ? c 3. applications ? i 2 c/smbus ? uart ? gpio nts0101 dual supply translating tr ansceiver; open drain; auto direction sensing rev. 5 ? 11 august 2014 product data sheet
nts0101 all information provided in this document is subject to legal disclaimers. ? nxp semiconductors n.v. 2014. all rights res erved. product data sheet rev. 5 ? 11 august 2014 2 of 23 nxp semiconductors nts0101 dual supply translating transceiver; op en drain; auto direction sensing 4. ordering information 5. marking [1] the pin 1 indicator is on the lower left co rner of the device, below the marking code. 6. functional diagram table 1. ordering information type number package temperature range name description version nts0101gw ? 40 ? cto+125 ? c sc-88 plastic surface-mounted package; 6 leads sot363 nts0101gm ? 40 ? cto+125 ? c xson6 plastic extremely thin small outline package; no leads; 6 terminals; body 1 ? 1.45 ? 0.5 mm sot886 nts0101gf ? 40 ? c to +125 ? c xson6 plastic extremely thin small outline package; no leads; 6 terminals; body 1 ? 1 ? 0.5 mm sot891 nts0101gs ? 40 ? c to +125 ? c xson6 extremely thin small outline package; no leads; 6 terminals; body 1.0 ? 1.0 ? 0.35 mm sot1202 table 2. marking type number marking code [1] nts0101gw s1 nts0101gm s1 nts0101gf s1 nts0101gs s1 fig 1. logic symbol 001aan317 5 3 oe gate bias a 4 b v cc(a) v cc(b) nts0101 all information provided in this document is subject to legal disclaimers. ? nxp semiconductors n.v. 2014. all rights res erved. product data sheet rev. 5 ? 11 august 2014 3 of 23 nxp semiconductors nts0101 dual supply translating transceiver; op en drain; auto direction sensing 7. pinning information 7.1 pinning 7.2 pin description 8. functional description [1] h = high voltage level; l = low voltage level; x = don?t care; z = high-impedance off-state. [2] when either v cc(a) or v cc(b) is at gnd level, the device goes into power-down mode. fig 2. pin configuration sot363 fig 3. pin config uration sot886 fig 4. pin configuration sot891 and sot1202 nts0101 v cc(a) v cc(b) gnd ab 001aan318 1 2 3 6 oe 5 4 nts0101 gnd 001aan319 v cc(a) a oe v cc(b) b transparent top view 2 3 1 5 4 6 nts0101 gnd 001aan320 v cc(a) a oe v cc(b) b transparent top view 2 3 1 5 4 6 table 3. pin description symbol pin description v cc(a) 1 supply voltage a gnd 2 ground (0 v) a 3 data input or output (referenced to v cc(a) ) b 4 data input or output (referenced to v cc(b) ) oe 5 output enable input (active high; referenced to v cc(a) ) v cc(b) 6 supply voltage b table 4. function table [1] supply voltage input input/output v cc(a) v cc(b) oe a b 1.65 v to v cc(b) 2.3 v to 5.5 v l z z 1.65 v to v cc(b) 2.3 v to 5.5 v h input or output output or input gnd [2] gnd [2] xzz nts0101 all information provided in this document is subject to legal disclaimers. ? nxp semiconductors n.v. 2014. all rights res erved. product data sheet rev. 5 ? 11 august 2014 4 of 23 nxp semiconductors nts0101 dual supply translating transceiver; op en drain; auto direction sensing 9. limiting values [1] the minimum input and minimum output voltage ratings may be exceeded if the input and output current ratings are observed. [2] v cco is the supply voltage associated with the output. [3] for sc-88 and sc-74a packages: above 87.5 ? c the value of p tot derates linearly with 4.0 mw/k. for xson6 packages: above 118 ? c the value of p tot derates linearly with 7.8 mw/k. 10. recommended operating conditions [1] the a and b sides of an unused i/o pair must be held in the same state, both at v cci or both at gnd. [2] v cc(a) must be less than or equal to v cc(b) . table 5. limiting values in accordance with the absolute maximum rating system (iec 60134). voltages are referenced to gnd (ground = 0 v). symbol parameter conditions min max unit v cc(a) supply voltage a ? 0.5 +6.5 v v cc(b) supply voltage b ? 0.5 +6.5 v v i input voltage a port and oe input [1] [2] ? 0.5 +6.5 v b port [1] [2] ? 0.5 +6.5 v v o output voltage active mode [1] [2] a or b port ? 0.5 v cco +0.5 v power-down or 3-state mode [1] a port ? 0.5 +4.6 v b port ? 0.5 +6.5 v i ik input clamping current v i <0v ? 50 - ma i ok output clamping current v o <0v ? 50 - ma i o output current v o =0vtov cco [2] - ? 50 ma i cc supply current i cc(a) or i cc(b) -1 0 0m a i gnd ground current ? 100 - ma t stg storage temperature ? 65 +150 ?c p tot total power dissipation t amb = ? 40 ? c to +125 ?c [3] -2 5 0m w table 6. recommended operating conditions [1] [2] symbol parameter conditions min max unit v cc(a) supply voltage a 1.65 3.6 v v cc(b) supply voltage b 2.3 5.5 v t amb ambient temperature ? 40 +125 ?c ? t/ ? v input transition rise and fall rate a or b port; push-pull driving v cc(a) = 1.65 v to 3.6 v; v cc(b) = 2.3 v to 5.5 v - 10 ns/v oe input v cc(a) = 1.65 v to 3.6 v; v cc(b) = 2.3 v to 5.5 v - 10 ns/v nts0101 all information provided in this document is subject to legal disclaimers. ? nxp semiconductors n.v. 2014. all rights res erved. product data sheet rev. 5 ? 11 august 2014 5 of 23 nxp semiconductors nts0101 dual supply translating transceiver; op en drain; auto direction sensing 11. static characteristics [1] v cco is the supply voltage associated with the output. table 7. typical static characteristics at recommended operating conditions; voltag es are referenced to gnd (ground = 0 v); t amb = 25 ? c. symbol parameter conditions min typ max unit i i input leakage current oe input; v i = 0 v to 3.6 v; v cc(a) =1.65vto3.6v; v cc(b) = 2.3 v to 5.5 v -- ? 1 ? a i oz off-state output current a or b port; v o =0vorv cco ; v cc(a) = 1.65 v to 3.6 v; v cc(b) = 2.3 v to 5.5 v [1] -- ? 1 ? a i off power-off leakage current a port; v i or v o = 0 v to 3.6 v; v cc(a) =0v;v cc(b) =0vto5.5v -- ? 1 ? a b port; v i or v o = 0 v to 5.5 v; v cc(b) =0v;v cc(a) =0vto3.6v -- ? 1 ? a c i input capacitance oe input; v cc(a) = 3.3 v; v cc(b) =3.3v - 1 - pf c i/o input/output capacitance a port - 4 - pf b port - 7.5 - pf a or b port; v cc(a) = 3.3 v; v cc(b) =3.3v - 11 - pf table 8. typical supply current at recommended operating conditions; voltag es are referenced to gnd (ground = 0 v); t amb = 25 ? c. v cc(a) v cc(b) unit 2.5 v 3.3 v 5.0 v i cc(a) i cc(b) i cc(a) i cc(b) i cc(a) i cc(b) 1.8 v 0.1 0.5 0.1 1.5 0.1 4.6 ? a 2.5 v 0.1 0.1 0.1 0.8 0.1 3.8 ? a 3.3 v - - 0.1 0.1 0.1 2.8 ? a table 9. static characteristics at recommended operating conditions; volt ages are referenced to gnd (ground = 0 v). symbol parameter conditions ? 40 ? c to +85 ? c ? 40 ? c to +125 ?c unit min max min max v ih high-level input voltage a port v cc(a) = 1.65 v to 1.95 v; v cc(b) = 2.3 v to 5.5 v [1] v cci ? 0.2 - v cci ? 0.2 - v v cc(a) = 2.3 v to 3.6 v; v cc(b) = 2.3 v to 5.5 v [1] v cci ? 0.4 - v cci ? 0.4 - v b port v cc(a) = 1.65 v to 3.6 v; v cc(b) = 2.3 v to 5.5 v [1] v cci ? 0.4 - v cci ? 0.4 - v oe input v cc(a) = 1.65 v to 3.6 v; v cc(b) = 2.3 v to 5.5 v 0.65v cc(a) -0.65v cc(a) -v nts0101 all information provided in this document is subject to legal disclaimers. ? nxp semiconductors n.v. 2014. all rights res erved. product data sheet rev. 5 ? 11 august 2014 6 of 23 nxp semiconductors nts0101 dual supply translating transceiver; op en drain; auto direction sensing [1] v cci is the supply voltage associated with the input. [2] v cco is the supply voltage associated with the output. v il low-level input voltage a or b port v cc(a) = 1.65 v to 3.6 v; v cc(b) = 2.3 v to 5.5 v - 0.15 - 0.15 v oe input v cc(a) = 1.65 v to 3.6 v; v cc(b) = 2.3 v to 5.5 v - 0.35v cc(a) - 0.35v cc(a) v v oh high-level output voltage i o = ? 20 ? a v cc(a) = 1.65 v to 3.6 v; v cc(b) = 2.3 v to 5.5 v [2] 0.67v cco - 0.67v cco -v v ol low-level output voltage a or b port; i o =1 ma [2] v i ? 0.15 v; v cc(a) = 1.65 v to 3.6 v; v cc(b) = 2.3 v to 5.5 v - 0.4 - 0.4 v i i input leakage current oe input; v i = 0 v to 3.6 v; v cc(a) = 1.65 v to 3.6 v; v cc(b) = 2.3 v to 5.5 v - ? 2- ? 12 ? a i oz off-state output current a or b port; v o =0vorv cco ; v cc(a) = 1.65 v to 3.6 v; v cc(b) = 2.3 v to 5.5 v [2] - ? 2- ? 12 ? a i off power-off leakage current a port; v i or v o = 0 v to 3.6 v; v cc(a) =0v;v cc(b) =0vto5.5v - ? 2- ? 12 ? a b port; v i or v o = 0 v to 3.6 v; v cc(b) =0v;v cc(a) =0vto3.6v - ? 2- ? 12 ? a i cc supply current v i = 0 v or v cci ; i o = 0 a [1] i cc(a) v cc(a) = 1.65 v to 3.6 v; v cc(b) = 2.3 v to 5.5 v -2.4 - 15 ? a v cc(a) = 3.6 v; v cc(b) = 0 v - 2.2 - 15 ? a v cc(a) = 0 v; v cc(b) =5.5v - ? 1- ? 8 ? a i cc(b) v cc(a) = 1.65 v to 3.6 v; v cc(b) = 2.3 v to 5.5 v -12 - 30 ? a v cc(a) = 3.6 v; v cc(b) =0v - ? 1- ? 5 ? a v cc(a) = 0 v; v cc(b) =5.5v - 1 - 6 ? a i cc(a) + i cc(b) v cc(a) = 1.65 v to 3.6 v; v cc(b) = 2.3 v to 5.5 v - 14.4 - 30 ? a table 9. static characteristics ?continued at recommended operating conditions; volt ages are referenced to gnd (ground = 0 v). symbol parameter conditions ? 40 ? c to +85 ? c ? 40 ? c to +125 ?c unit min max min max nts0101 all information provided in this document is subject to legal disclaimers. ? nxp semiconductors n.v. 2014. all rights res erved. product data sheet rev. 5 ? 11 august 2014 7 of 23 nxp semiconductors nts0101 dual supply translating transceiver; op en drain; auto direction sensing 12. dynamic characteristics table 10. dynamic characteristics for temperature range ? 40 ? c to +85 ?c [1] voltages are referenced to gnd (ground = 0 v); for test circuit, see figure 7 ; for wave forms, see figure 5 and figure 6 . symbol parameter conditions v cc(b) unit 2.5 v ? 0.2 v 3.3 v ? 0.3 v 5.0 v ? 0.5 v min max min max min max v cc(a) = 1.8 v ? 0.15 v t phl high to low propagation delay a to b - 4.6 - 4.7 - 5.8 ns t plh low to high propagation delay a to b - 6.8 - 6.8 - 7.0 ns t phl high to low propagation delay b to a - 4.4 - 4.5 - 4.7 ns t plh low to high propagation delay b to a - 5.3 - 4.5 - 0.5 ns t en enable time oe to a; b - 200 - 200 - 200 ns t dis disable time oe to a; no external load [2] -25-25-25ns oe to b; no external load [2] -25-25-25ns oe to a - 230 - 230 - 230 ns oe to b - 200 - 200 - 200 ns t tlh low to high output transition time a port 3.2 9.5 2.3 9.3 1.8 7.6 ns b port 3.3 10.8 2.7 9.1 2.7 7.6 ns t thl high to low output transition time a port 2.0 5.9 1.9 6.0 1.7 13.3 ns b port 2.9 7.6 2.8 7.5 2.8 10.0 ns t w pulse width data inputs 20 - 20 - 20 - ns f data data rate - 50 - 50 - 50 mbps v cc(a) = 2.5 v ? 0.2 v t phl high to low propagation delay a to b - 3.2 - 3.3 - 3.4 ns t plh low to high propagation delay a to b - 3.5 - 4.1 - 4.4 ns t phl high to low propagation delay b to a - 3.0 - 3.6 - 4.3 ns t plh low to high propagation delay b to a - 2.5 - 1.6 - 0.7 ns t en enable time oe to a; b - 200 - 200 - 200 ns t dis disable time oe to a; no external load [2] -20-20-20ns oe to b; no external load [2] -20-20-20ns oe to a - 200 - 200 - 200 ns oe to b - 200 - 200 - 200 ns t tlh low to high output transition time a port 2.8 7.4 2.6 6.6 1.8 6.2 ns b port 3.2 8.3 2.9 7.9 2.4 6.8 ns nts0101 all information provided in this document is subject to legal disclaimers. ? nxp semiconductors n.v. 2014. all rights res erved. product data sheet rev. 5 ? 11 august 2014 8 of 23 nxp semiconductors nts0101 dual supply translating transceiver; op en drain; auto direction sensing [1] t en is the same as t pzl and t pzh . t dis is the same as t plz and t phz . [2] delay between oe going low and when the outputs are disabled. t thl high to low output transition time a port 1.9 5.7 1.9 5.5 1.8 5.3 ns b port 2.2 7.8 2.4 6.7 2.6 6.6 ns t w pulse width data inputs 20 - 20 - 20 - ns f data data rate - 50 - 50 - 50 mbps v cc(a) = 3.3 v ? 0.3 v t phl high to low propagation delay a to b - - - 2.4 - 3.1 ns t plh low to high propagation delay a to b - - - 4.2 - 4.4 ns t phl high to low propagation delay b to a - - - 2.5 - 3.3 ns t plh low to high propagation delay b to a - - - 2.5 - 2.6 ns t en enable time oe to a; b - - - 200 - 200 ns t dis disable time oe to a; no external load [2] ---15-15ns oe to b; no external load [2] ---15-15ns oe to a - - - 260 - 260 ns oe to b - - - 200 - 200 ns t tlh low to high output transition time a port - - 2.3 5.6 1.9 5.9 ns b port - - 2.5 6.4 2.1 7.4 ns t thl high to low output transition time a port - - 2.0 5.4 1.9 5.0 ns b port - - 2.3 7.4 2.4 7.6 ns t w pulse width data inputs - - 20 - 20 - ns f data data rate - - - 50 - 50 mbps table 10. dynamic characteristics for temperature range ? 40 ? c to +85 ?c [1] ?continued voltages are referenced to gnd (ground = 0 v); for test circuit, see figure 7 ; for wave forms, see figure 5 and figure 6 . symbol parameter conditions v cc(b) unit 2.5 v ? 0.2 v 3.3 v ? 0.3 v 5.0 v ? 0.5 v min max min max min max nts0101 all information provided in this document is subject to legal disclaimers. ? nxp semiconductors n.v. 2014. all rights res erved. product data sheet rev. 5 ? 11 august 2014 9 of 23 nxp semiconductors nts0101 dual supply translating transceiver; op en drain; auto direction sensing table 11. dynamic characteristics for temperature range ? 40 ? c to +125 ?c [1] voltages are referenced to gnd (ground = 0 v); for test circuit, see figure 7 ; for wave forms, see figure 5 and figure 6 . symbol parameter conditions v cc(b) unit 2.5 v ? 0.2 v 3.3 v ? 0.3 v 5.0 v ? 0.5 v min max min max min max v cc(a) = 1.8 v ? 0.15 v t phl high to low propagation delay a to b - 5.8 - 5.9 - 7.3 ns t plh low to high propagation delay a to b - 8.5 - 8.5 - 8.8 ns t phl high to low propagation delay b to a - 5.5 - 5.7 - 5.9 ns t plh low to high propagation delay b to a - 6.7 - 5.7 - 0.7 ns t en enable time oe to a; b - 200 - 200 - 200 ns t dis disable time oe to a; no external load [2] -30-30-30ns oe to b; no external load [2] -30-30-30ns oe to a - 250 - 250 - 250 ns oe to b - 220 - 220 - 220 ns t tlh low to high output transition time a port 3.2 11.9 2.3 11.7 1.8 9.5 ns b port 3.3 13.5 2.7 11.4 2.7 9.5 ns t thl high to low output transition time a port 2.0 7.4 1.9 7.5 1.7 16.7 ns b port 2.9 9.5 2.8 9.4 2.8 12.5 ns t w pulse width data inputs 20 - 20 - 20 - ns f data data rate - 50 - 50 - 50 mbps v cc(a) = 2.5 v ? 0.2 v t phl high to low propagation delay a to b - 4.0 - 4.2 - 4.3 ns t plh low to high propagation delay a to b - 4.4 - 5.2 - 5.5 ns t phl high to low propagation delay b to a - 3.8 - 4.5 - 5.4 ns t plh low to high propagation delay b to a - 3.2 - 2.0 - 0.9 ns t en enable time oe to a; b - 200 - 200 - 200 ns t dis disable time oe to a; no external load [2] -25-25-25ns oe to b; no external load [2] -25-25-25ns oe to a - 220 - 220 - 220 ns oe to b - 220 - 220 - 220 ns t tlh low to high output transition time a port 2.8 9.3 2.6 8.3 1.8 7.8 ns b port 3.2 10.4 2.9 9.7 2.4 8.3 ns t thl high to low output transition time a port 1.9 7.2 1.9 6.9 1.8 6.7 ns b port 2.2 9.8 2.4 8.4 2.6 8.3 ns nts0101 all information provided in this document is subject to legal disclaimers. ? nxp semiconductors n.v. 2014. all rights res erved. product data sheet rev. 5 ? 11 august 2014 10 of 23 nxp semiconductors nts0101 dual supply translating transceiver; op en drain; auto direction sensing [1] t en is the same as t pzl and t pzh . t dis is the same as t plz and t phz . [2] delay between oe going low and when the outputs are disabled. t w pulse width data inputs 20 - 20 - 20 - ns f data data rate - 50 - 50 - 50 mbps v cc(a) = 3.3 v ? 0.3 v t phl high to low propagation delay a to b - - - 3.0 - 3.9 ns t plh low to high propagation delay a to b - - - 5.3 - 5.5 ns t phl high to low propagation delay b to a - - - 3.2 - 4.2 ns t plh low to high propagation delay b to a - - - 3.2 - 3.3 ns t en enable time oe to a; b - - - 200 - 200 ns t dis disable time oe to a; no external load [2] - - - 20 - 20 ns oe to b; no external load [2] - - - 20 - 20 ns oe to a - - - 280 - 280 ns oe to b - - - 220 - 220 ns t tlh low to high output transition time a port - - 2.3 7.0 1.9 7.4 ns b port - - 2.5 8.0 2.1 9.3 ns t thl high to low output transition time a port - - 2.0 6.8 1.9 6.3 ns b port - - 2.3 9.3 2.4 9.5 ns t w pulse width data inputs - - 20 - 20 - ns f data data rate - - - 50 - 50 mbps table 11. dynamic characteristics for temperature range ? 40 ? c to +125 ?c [1] ?continued voltages are referenced to gnd (ground = 0 v); for test circuit, see figure 7 ; for wave forms, see figure 5 and figure 6 . symbol parameter conditions v cc(b) unit 2.5 v ? 0.2 v 3.3 v ? 0.3 v 5.0 v ? 0.5 v min max min max min max nts0101 all information provided in this document is subject to legal disclaimers. ? nxp semiconductors n.v. 2014. all rights res erved. product data sheet rev. 5 ? 11 august 2014 11 of 23 nxp semiconductors nts0101 dual supply translating transceiver; op en drain; auto direction sensing 13. waveforms [1] v cci is the supply voltage associated with the input. [2] v cco is the supply voltage associated with the output. measurement points are given in table 12 . v ol and v oh are typical output voltage levels that occur with the output load. fig 5. the data input (a, b) to data output (b, a) propagation delay times 001aan321 a, b input b, a output t plh t phl gnd v i v oh v m v m v ol t thl 10 % 90 % t tlh measurement points are given in table 12 . v ol and v oh are typical output voltage levels that occur with the output load. fig 6. enable and disable times 001aal919 t plz t phz outputs disabled outputs enabled outputs enabled output low-to-off off-to-low output high-to-off off-to-high oe input v oh v cco gnd v ol gnd v i t pzl t pzh v y v m v m v x v m table 12. measurement points [1] [2] supply voltage input output v cco v m v m v x v y 1.8 v ? 0.15 v 0.5v cci 0.5v cco v ol + 0.15 v v oh ? 0.15 v 2.5 v ? 0.2 v 0.5v cci 0.5v cco v ol + 0.15 v v oh ? 0.15 v 3.3 v ? 0.3 v 0.5v cci 0.5v cco v ol + 0.3 v v oh ? 0.3 v 5.0 v ? 0.5 v 0.5v cci 0.5v cco v ol + 0.3 v v oh ? 0.3 v nts0101 all information provided in this document is subject to legal disclaimers. ? nxp semiconductors n.v. 2014. all rights res erved. product data sheet rev. 5 ? 11 august 2014 12 of 23 nxp semiconductors nts0101 dual supply translating transceiver; op en drain; auto direction sensing [1] v cci is the supply voltage associated with the input. [2] for measuring data rate, pulse width, propagat ion delay and output rise and fall measurements, r l = 1 m ? . for measuring enable and disable times, r l = 50 k ? . [3] v cco is the supply voltage associated with the output. test data is given in table 13 . all input pulses are supplied by generators having the following characteristics: prr ? 10 mhz; z o = 50 ? ; dv/dt ? 1.0 v/ns. r l = load resistance. c l = load capacitance including jig and probe capacitance. v ext = external voltage for measuring switching times. fig 7. test circuit for measuring switching times v m v m t w t w 10 % 90 % 0 v v i v i negative pulse positive pulse 0 v v m v m 90 % 10 % t f t r t r t f 001aal963 v ext v cc v i v o dut c l r l r l g table 13. test data supply voltage input load v ext v cc(a) v cc(b) v i [1] ? t/ ? v c l r l [2] t plh , t phl t pzh , t phz t pzl , t plz [3] 1.65 v to 3.6 v 2.3 v to 5.5 v v cci ? 1.0ns/v 15pf 50k ? , 1 m ? open open 2v cco nts0101 all information provided in this document is subject to legal disclaimers. ? nxp semiconductors n.v. 2014. all rights res erved. product data sheet rev. 5 ? 11 august 2014 13 of 23 nxp semiconductors nts0101 dual supply translating transceiver; op en drain; auto direction sensing 14. application information 14.1 applications voltage level-translation applications. the nts0101 can be used in point-to-point applications to interface be tween devices or systems oper ating at different supply voltages. the device is primarily targeted at i 2 c or 1-wire which use open-drain drivers. it may also be used in applications where push-pull drivers are connected to the ports, however the ntb0101 ma y be more suitable. 14.2 architecture the architecture of the nts0101 is shown in figure 9 . the device does not require an extra input signal to control the direction of data flow from a to b or b to a. the nts0101 is a "switch" type voltage translat or, it employs two key circuits to enable voltage translation: 1. a pass-gate transistor (n-channel) that ties the ports together. 2. an output edge-rate accelerator that detects and accelerates rising edges on the i/o pins. fig 8. typical operating circuit 001aan322 oe nts0101 system a data b v cc(a) v cc(b) system controller data 1.8 v 1.8 v 3.3 v 0.1 f 0.1 f 1 f 3.3 v fig 9. architecture of nts0101 i/o cel 001aal965 v cc(a) v cc(b) ab 10 k 10 k t1 t3 t2 one shot one shot gate bias nts0101 all information provided in this document is subject to legal disclaimers. ? nxp semiconductors n.v. 2014. all rights res erved. product data sheet rev. 5 ? 11 august 2014 14 of 23 nxp semiconductors nts0101 dual supply translating transceiver; op en drain; auto direction sensing the gate bias voltage of the pass gate tran sistor (t3) is set at approximately one threshold voltage above the v cc level of the low-voltage side. during a low-to-high transition, the output one-shot accelerates th e output transition by switching on the pmos transistors (t1, t2). it bypasses the 10 k ? pull-up resistors and increases the current drive capability. the o ne-shot is activated once the inpu t transition reac hes approximately v cci /2; it is de-activated approximately 50 ns after the output reaches v cco /2. during the acceleration time, the driver output resistance is between approximately 50 ? and 70 ? . to avoid signal contention and minimize dynamic i cc , the user should wait for the one-shot circuit to turn-off before applyin g a signal in the opposite direction. pull-up resistors are included in the device for dc current sourcing capability. 14.3 input driver requirements as the nts0101 is a switch type translator, prope rties of the input driver directly effect the output signal. the external open-drain or push-pull driver applied to an i/o determines the static current sinking capability of the syst em. the max data rate , high-to-low output transition time (t thl ), and propagation delay (t phl ), are dependent upon the output impedance and edge-rate of the external driver. the limits provided for these parameters in the data sheet assume a driver with output impedance below 50 ? is used. 14.4 output load considerations the maximum lumped capacitive load that can be driven is dependant upon the one-shot pulse duration. in cases with very heavy capacitive loading, th ere is a risk that the output does not reach the positive rail wi thin the one-shot pulse duration. to avoid excessive capacitive loading and to ensure correct triggering of the one-shot, use short trace lengths and low capacitance connectors on nts0101 pcb layouts. the length of the pcb trace should be such that th e round-trip delay of any reflection is within the one-shot pulse duration (approximately 50 ns). it ensures low impedance termination and avoids output signal oscilla tions and one-s hot retriggering. 14.5 power-up during operation, v cc(a) must never be higher than v cc(b) . however, during power-up, v cc(a) ? v cc(b) does not damage the device, so eith er power supply can be ramped up first. there is no special power-up sequencing required. the nts0101 includes circuitry that disables all output ports when either v cc(a) or v cc(b) is switched off. 14.6 enable and disable an output enable input (oe) is used to dis able the device. setting oe = low causes all i/os to assume the high-impedance off-state. the disable time (t dis with no external load) indicates the delay between when oe goes low and when outputs actually become disabled. the enable time (t en ) indicates the amount of time the user must allow for one one-shot circuitry to become operation al after oe is taken high. to ensure the high-impedance off-state during power-up or power-down, pin oe should be tied to gnd through a pull-down resistor . the current-sourcing capability of the driver determines the minimum value of the resistor. nts0101 all information provided in this document is subject to legal disclaimers. ? nxp semiconductors n.v. 2014. all rights res erved. product data sheet rev. 5 ? 11 august 2014 15 of 23 nxp semiconductors nts0101 dual supply translating transceiver; op en drain; auto direction sensing 14.7 pull-up or pull-down resistors on i/os lines the a port i/o has an internal 10 k ? pull-up resistor to v cc(a) . the b port i/o has an internal 10 k ? pull-up resistor to v cc(b) . if a smaller value of pull- up resistor is required, add an external resistor in parallel to the internal 10 k ? . this pull-up resi stor effects the v ol level. when oe goes low, the internal pull-ups of the nts0101 are disabled. nts0101 all information provided in this document is subject to legal disclaimers. ? nxp semiconductors n.v. 2014. all rights res erved. product data sheet rev. 5 ? 11 august 2014 16 of 23 nxp semiconductors nts0101 dual supply translating transceiver; op en drain; auto direction sensing 15. package outline fig 10. package outline sot363 (sc-88) 5 ( ) ( 5 ( 1 & |