1 industrial temperature range idt74auc16245 1.8v cmos 16-bit bus transceiver with 3-state outputs september 2002 idt74auc16245 industrial temperature range 1.8v cmos 16-bit bus transceiver with 3-state outputs description: this 16-bit bus transceiver is built using advanced cmos technology. the auc16245 is designed specifically for asynchronous communications between data buses. the control function implementation minimizes external timing requirements. this device can be used as one 16-bit transceiver or two 8-bit transceivers. it allows data transmission from a bus to b bus or from b bus to a bus, depending on the logic level at the direction-control (dir) input. the output-enable ( oe ) input can be used to disable the device so that the buses are effectively isolated. this device is fully specified for partial power-down applications using i off . the i off circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down. the auc16245 is designed with a 9ma output driver. this driver is capable of driving a moderate load while maintaining speed performance. to ensure the high-impedance state during power up or power down, oe should be tied to v dd through a pull-up resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. 1 a 1 1 b 1 47 2 1 dir 1 oe 2 a 1 2 b 1 36 13 2 dir 2 oe 1 48 24 25 to seven other channels to seven other channels the idt logo is a registered trademark of integrated device technology, inc. ? 2002 integrated device technology, inc. dsc-5954/17 features: ? esd > 2000v per mil-std-883, method 3015; > 200v using machine model (c = 200pf, r = 0) ? 1.8v optimized ? 0.8v to 2.7v operating range ? inputs/outputs tolerant up to 3.6v ? output drivers: 9ma @ v dd = 2.3v ? supports hot insertion ? available in tssop, tvsop, and vfbga packages functional block diagram applications: ? high performance, low voltage communications systems ? high performance, low voltage computing systems
2 industrial temperature range idt74auc16245 1.8v cmos 16-bit bus transceiver with 3-state outputs a 1oe nc nc nc nc 1dir b 1a2 1a1 gnd gnd 1b1 1b2 c 1a4 1a3 v dd v dd 1b3 1b4 e 1a8 1a7 1b7 1b8 f 2a1 2a2 2b2 2b1 g 2a3 2a4 gnd gnd 2b4 2b3 h 2a5 2a6 v dd v dd 2b6 2b5 j 2a7 2a8 gnd gnd 2b8 2b7 k 2oe 2dir nc nc nc nc d 1a6 1a5 gnd gnd 1b5 1b6 6 5 4 3 2 1 6 5 4 3 2 1 abcdefghjk 56 ball vfbga package layout pinout configuration vfbga top view note: nc = no internal connection
3 industrial temperature range idt74auc16245 1.8v cmos 16-bit bus transceiver with 3-state outputs tssop/ tvsop top view pin configuration 1 dir 1 b 1 1 b 2 gnd 1 b 3 1 b 4 v dd 1 b 5 1 b 6 gnd 1 b 7 1 b 8 2 b 1 2 b 2 2 b 4 2 dir gnd v dd 2 b 5 2 b 6 gnd 2 b 7 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 40 41 42 43 44 45 46 47 48 1 1 oe 1 a 1 1 a 2 gnd 1 a 3 1 a 4 v dd 1 a 5 1 a 6 1 a 7 1 a 8 2 a 1 gnd 2 a 3 2 a 4 2 a 5 2 a 6 gnd 2 a 7 2 a 8 2 oe 2 b 3 2 b 8 v dd 2 a 2 gnd function table (each 8-bit section) (1) note: 1. h = high voltage level l = low voltage level x = don't care z = high-impedance inputs x oe xdir outputs l l bus b data to bus a l h bus a data to bus b hxz pin description pin names description x oe 3-state output enable inputs (active low) xdir direction co ntrol inputs x a x a side inputs or 3-state outputs x b x b side inputs or 3-state outputs symbol description max unit v term terminal voltage with respect to gnd ?0.5 to +3.6 v (all input and v dd terminals) v term terminal voltage with respect to gnd ?0.5 to +3.6 v (any i/o or output terminals in high- impedance or power-off state) v term terminal voltage with respect to gnd ?0.5 to +3.6 v (any i/o or output terminals in high or low state) t stg storage temperature ?65 to +150 c i out continuous dc output current 20 ma i ik continuous clamp current v i > v dd +50 ma v i < 0 ?50 i ok continuous clamp current, v o < 0 ?50 ma i dd continuous current through 100 ma i ss each v dd or gnd absolute maximum ratings (1) (1) (1) (1) (1) note: 1. stresses greater than those listed under absolute maximum ratings may cause permanent damage to the device. this is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. exposure to absolute maximum rating conditions for extended periods may affect reliability. capacitance (t a = +25c, f = 1.0mhz, v dd = 2.5v) notes: 1. applies to the control inputs. 2. applies to ports a and b. symbol parameter conditions typ. max. unit c in input capacitance (1) v in = v dd or gnd 3 pf c i/o i/o port capacitance (2) v i/o = v dd or gnd 7 pf
4 industrial temperature range idt74auc16245 1.8v cmos 16-bit bus transceiver with 3-state outputs symbol parameter test conditions min. max. unit v dd supply voltage 0.8 2.7 v v dd = 0.8v v dd ? v dd = 1.1v to 1.3v 0.65 x v dd ? v ih input high voltage level v dd = 1.4v to 1.6v 0.65 x v dd ?v v dd = 1.65v to 1.95v 0.65 x v dd ? v dd = 2.3v to 2.7v 1.7 ? v dd = 0.8v ? 0 v dd = 1.1v to 1.3v ? 0.35 x v dd v il input low voltage level v dd = 1.4v to 1.6v ? 0.35 x v dd v v dd = 1.65v to 1.95v ? 0.35 x v dd v dd = 2.3v to 2.7v ? 0.7 v i input voltage 0 2.7 v v o output voltage active state 0 v dd v 3-state 0 2.7 v dd = 0.8v ? ?0.7 v dd = 1.1v ? ?3 i oh high level output current v dd = 1.4v ? ?5 ma v dd = 1.65v ? ?8 v dd = 2.3v ? ?9 v dd = 0.8v ? 0.7 v dd = 1.1v ? 3 i ol low level output current v dd = 1.4v ? 5 ma v dd = 1.65v ? 8 v dd = 2.3v ? 9 ? t/ ? v input transition rise or fall time ? 5 ns/v t a operating free-air temperature ?40 +85 c recommended operating characteristics (1) note: 1. all unused inputs of the device must be held at v dd or gnd to ensure proper operation. symbol parameter test conditions min. typ. max. unit i ih input high or low current data inputs v dd = 2.7v, v i = v dd or gnd ? ? 10 a i il control inputs ? ? 5 i off input/output power off leakage v dd = 0v, v in or v o 2.7v ? ? 10 a i ozh (2) high impedance output current v dd = 2.7v v o = v dd ? ? 10 a i ozl (2) (3-state output pins) v o = gnd ? ? 10 i ddl quiescent power supply current v dd = 0.8v to 2.7v ? ? 20 a i ddh v in = gnd or v dd i ddz dc electrical characteristics over operating range (1) following conditions apply unless otherwise specified: operating conditions: t a = ?40c to +85c notes: 1. all unused inputs of the device must be held at v dd or gnd to ensure proper operation. 2. for the i/o ports, the parameters i ozh and i ozl include the input leakage current.
5 industrial temperature range idt74auc16245 1.8v cmos 16-bit bus transceiver with 3-state outputs symbol parameter test conditions (1) min. typ. max. unit v dd = 0.8v - 2.7v i oh = ?100 av dd - 0.1 ? ? v dd = 0.8v i oh = ?0.7ma ? 0.55 ? v oh output high voltage v dd = 1.1v (2) i oh = ?3ma 0.8 ? ? v v dd = 1.4v (3) i oh = ?5ma 1 ? ? v dd = 1.65v (4) i oh = ?8ma 1.2 ? ? v dd = 2.3v (5) i oh = ?9ma 1.8 ? ? v dd = 0.8v - 2.7v i oh = 100 a ? ? 0.2 v dd = 0.8v i ol = 0.7ma ? 0.25 ? v ol output low voltage v dd = 1.1v (2) i ol = 3ma ? ? 0.3 v v dd = 1.4v (3) i ol = 5ma ? ? 0.4 v dd = 1.65v (4) i ol = 8ma ? ? 0.45 v dd = 2.3v (5) i oh = 9ma ? ? 0.6 output drive characteristics notes: 1. v il and v ih must be within the min. or max. range shown in the dc electrical characteristics table for the appropriate v dd range. t a = -40c to +85c. 2. demonstrates operation for nominal v dd = 1.2v. 3. demonstrates operation for nominal v dd = 1.5v. 4. demonstrates operation for nominal v dd = 1.8v. 5. demonstrates operation for nominal v dd = 2.5v. switching characteristics (1) note: 1. see test circuits and waveforms. t a = -40c to +85c. v dd = 0.8v v dd = 1.2v0.1v v dd = 1.5v0.1v v dd = 1.8v0.15v v dd = 2.5v0.2v symbol parameter typ. min. max. min. max. min. typ. max. min. max. unit t plh propagation delay 5.6 0.5 3.1 0.5 2 0.5 1.5 2 0.4 1.9 ns t phl xax to xbx or xbx to xax t pzh output enable time 10 0.7 4.6 0.7 3.1 0.7 2.1 3.1 0.7 2.6 ns t pzl x oe to xax or xbx t phz output disable time 12.8 0.8 6.8 0.8 5 0.8 3.4 4.8 0.5 2.9 ns t plz x oe to xax or xbx operating characteristics, t a = 25c symbol parameter test conditions v dd = 0.8v v dd = 1.2v v dd = 1.5v v dd = 1.8v v dd = 2.5v unit c pd power dissipation outputs enabled c l = 0pf 22 23 24 25 29 pf capacitance outputs disabled f = 10mhz 1 1 1 1 1
6 industrial temperature range idt74auc16245 1.8v cmos 16-bit bus transceiver with 3-state outputs open v load gnd v dd pulse generator d.u.t. r l c l r t v in v out (1) same phase input transition opposite phase input transition 0v 0v v oh v ol t plh t phl t phl t plh output v dd v t v t v dd v t control input t plz 0v output normally low t pzh 0v switch closed output normally high enable disable switch open t phz 0v v ol + v lz v oh v t v t t pzl v load/2 v load/2 v dd v t v ol v oh - v hz r l test circuits and waveforms propagation delay test circuits for all outputs enable and disable times note: 1. diagram shown for input control enable-low and input control disable-high. definitions: c l = load capacitance: includes jig and probe capacitance. r t = termination resistance: should be equal to z out of the pulse generator. note: 1. pulse generator for all pulses: rate 10mhz; slew rate 1v/ns. test switch open drain disable low v load enable low disable high gnd enable high all other tests open switch position test conditions (1) symbol v dd = 0.8v v dd = 1.2v0.1v v dd = 1.5v0.1v v dd = 1.8v0.15v v dd = 2.5v0.2v unit v load 2xv dd 2xv dd 2xv dd 2xv dd 2xv dd v v t v dd /2 v dd /2 v dd /2 v dd /2 v dd /2 v v lz 100 100 100 150 150 mv v hz 100 100 100 150 150 mv r l 2 2 2 1 0.5 k ? c l 15 15 15 30 30 pf
7 industrial temperature range idt74auc16245 1.8v cmos 16-bit bus transceiver with 3-state outputs ordering information idt xx auc xxx xx package bv pa pf very fine pitch ball grid array thin shrink small outline package thin very small outline package 16 74 16-bit bus transceiver with 3-state outputs ? 40c to +85c 245 double-density blank no bus-hold device type temp. range xx family x bus-hold x grade i industrial temperature range corporate headquarters for sales: for tech support: 2975 stender way 800-345-7015 or 408-727-6116 logichelp@idt.com santa clara, ca 95054 fax: 408-492-8674 (408) 654-6459 www.idt.com
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