74fr16245 ? 2012 rochester electronics, llc. all rights reserved 12172012 specifcation number 74fr16245-ci(f) rev a page 1 of 5 ? 1999 fairchild semiconductor corporation ds010614 www.fairchildsemi.com october 1989 revised august 1999 74fr16245 16-bit transceiver with 3-state outputs 74fr16245 16-bit transceiver with 3-state outputs general description the 74fr16245 contains sixteen non-inverting bidirec- tional buffers with 3-state outputs and is intended for bus- oriented applications. current sinking capability is 64 ma on both the a and b ports. the device is byte controlled. each byte has separate control inputs which can be shorted together for full 16-bit operation. the transmit/ receive (t/r n ) inputs determine the direction of data flow through the transceiver. the output enable (oe n ) inputs disable both a and b ports by placing them in an high impedance state. features non-inverting buffers bidirectional data paths a and b output sink capability of 64 ma, source capability of 15 ma separate control pins for each byte guaranteed pin-to-pin skew low 3-state i il 16-bit version of the 74f245 or 74f645 ordering code: devices also available in tape and reel. specify by appending the suffix letter x to the ordering code. connection diagrams pin assignment for ssop pin assignment for plcc logic symbol order number package number package description 74fr16245qc v44a 44-lead plastic lead chip carrier (plcc), jedec mo-047, 0.650 square 74fr16245ssc ms48a 48-lead small shrink outline package (ssop), jedec mo-118, 0.300 wide ? 1999 fairchild semiconductor corporation ds010614 www.fairchildsemi.com october 1989 revised august 1999 74fr16245 16-bit transceiver with 3-state outputs 74fr16245 16-bit transceiver with 3-state outputs general description the 74fr16245 contains sixteen non-inverting bidirec- tional buffers with 3-state outputs and is intended for bus- oriented applications. current sinking capability is 64 ma on both the a and b ports. the device is byte controlled. each byte has separate control inputs which can be shorted together for full 16-bit operation. the transmit/ receive (t/r n ) inputs determine the direction of data flow through the transceiver. the output enable (oe n ) inputs disable both a and b ports by placing them in an high impedance state. features non-inverting buffers bidirectional data paths a and b output sink capability of 64 ma, source capability of 15 ma separate control pins for each byte guaranteed pin-to-pin skew low 3-state i il 16-bit version of the 74f245 or 74f645 ordering code: devices also available in tape and reel. specify by appending the suffix letter x to the ordering code. connection diagrams pin assignment for ssop pin assignment for plcc logic symbol order number package number package description 74fr16245qc v44a 44-lead plastic lead chip carrier (plcc), jedec mo-047, 0.650 square 74fr16245ssc ms48a 48-lead small shrink outline package (ssop), jedec mo-118, 0.300 wide rochester electronics guarantees performance of its semiconductor products to the original oem specifcations. typical values are for reference purposes only. certain minimum or maximum ratings may be based on product characterization, design, simulation, or sample testing. rochester electronics reserves the right to make changes without further notice to any specifcation herein. * for complete rochester ordering guide, please refer to page 2 *
page 2 of 5 rochester part number ocm part number package temperature 74fr16245qc 74fr16245qc ldcc-44 0 to +70c 74fr16245qcx 74fr16245qcx ldcc-44 0 to +70c 74fr16245ssc 74fr16245ssc ssop-48 0 to +70c 74FR16245SSCX 74FR16245SSCX ssop-48 0 to +70c rochester ordering guide 74fr16245 specifcation number 74fr16245-ci(f) rev a
page 3 of 5 www.fairchildsemi.com 2 74fr16245 pin descriptions truth table h = high voltage level l = low voltage level x = immaterial logic diagram pin names description oe n output enable input t/r n transmit/receive input a 0 Ca 15 a bus inputs/3-state outputs b 0 Cb 15 b bus inputs/3-state outputs inputs output operating mode byte1 (0:7) byte2 (8:15) oe 1 t/r 1 oe 2 t/r 2 byte1 (0:7) byte2 (8:15) l l h x bus b data to a high z state l h h x bus a data to b high z state h x l l high z state bus b data to a h x l h high z state bus a data to b l l l l bus b data to a bus b data to a l h l h bus a data to b bus a data to b h x h x high z state high z state 74fr16245 specifcation number 74fr16245-ci(f) rev a
page 4 of 5 3 www.fairchildsemi.com 74fr16245 absolute maximum ratings (note 1) recommended operating conditions note 1: absolute maximum ratings are values beyond which the device may be damaged or have its useful life impaired. functional operation under these conditions is not implied. note 2: either voltage limit or current limit is sufficient to protect inputs. dc electrical characteristics storage temperature ? 65 c to + 150 c ambient temperature under bias ? 55 c to + 125 c junction temperature under bias ? 55 c to + 150 c v cc pin potential to ground pin ? 0.5v to + 7.0v input voltage (note 2) ? 0.5v to + 7.0v input current (note 2) ? 30 ma to + 5.0 ma voltage applied to output in high state (with v cc = 0v) standard output ? 0.5v to v cc 3-state output ? 0.5v to + 5.5v current applied to output in low state (max) twice the rated i ol (ma) esd last passing voltage (min) 4000v free air ambient temperature 0 c to + 70 c supply voltage + 4.5v to + 5.5v symbol parameter min typ max units v cc conditions v ih input high voltage 2.0 v recognized as a high signal v il input low voltage 0.8 v recognized as a low signal v cd input clamp ? 1.2 v min i in = ? 18 ma diode voltage v oh output high 2.4 2.8 i oh = ? 3 ma voltage 2.0 2.44 v min i oh = ? 15 ma (a n , b n ) v ol output low 0.45 0.55 v min i ol = 64 ma voltage (a n , b n ) i ih input high current 5.0 a max v in = 2.7v i bvi input high current 7.0 a max v in = 7.0v break-down test (oe n , t/r n ) i bvit input high current 0.1 ma max v in = 5.5v breakdown test (i/o) (a n , b n ) i il input low ? 150 a max v in = 0.5v (t/r n , a n , b n ) current ? 100 a max v in = 0.5v (oe n ) i os output short-circuit ? 100 ? 225 ma max v out = 0v current (a n , b n ) i ih + output leakage 0 25 a max v out = 2.7v i ozh current (a n , b n ) i il + output leakage ? 20 ? 150 a max v out = 0.5v i ozl current (a n , b n ) i cex output high leakage 50 a max v out = v cc current (a n , b n ) v id input leakage 4.75 v 0.0 i id = 1.9 a tes t all other pins grounded i od output circuit 3.75 a 0.0 v iod = 150 mv leakage current all other pins grounded i zz bus drainage 100 a 0.0 v out = 5.25v tes t (a n , b n ) i cch power supply current 70 105 ma max v o = high i ccl power supply current 127 165 ma max v o = low i ccz power supply current 71 105 ma max v o = high z c in input capacitance 8.0 pf 5.0 oe , t/r 17.0 pf 5.0 a n , b n 74fr16245 specifcation number 74fr16245-ci(f) rev a
page 5 of 5 www.fairchildsemi.com 4 74fr16245 ac electrical characteristics extended ac characteristics note 3: skew is defined as the absolute value of the difference between the actual propagation delays for any two outputs of the same d evice. the specifi- cation applies to any outputs switching high-to-low (t oshl ) low-to-high (t oslh ), or high-to-low and/or low-to-high (t ost ). specifications guaran- teed with all outputs switching in phase. note 4: this specification is guaranteed but not tested the limits apply to propagation delays for all paths described switching in pha se, i.e., all low-to-high, high-to-low, 3-state-to-high, etc. note 5: these specifications guaranteed but not tested. the limits represent propagation delays with 250 pf load capacitors in place of the 50 pf load capacitors in the standard ac load. this specification pertains to single output switching only. symbol parameter t a = + 25 ct a = 0 c to + 70c unit v cc = + 5.0v v cc = + 5.0v c l = 50 pf c l = 50 pf min typ max min max t plh propagation delay 1.3 2.7 4.3 1.3 4.3 ns t phl a n to b n or b n to a n 1.3 2.2 4.3 1.3 4.3 t pzh output enable time 3.9 6.9 13.9 3.9 13.9 ns t pzl 3.9 9.7 13.9 3.9 13.9 t phz output disable time 1.8 3.9 6.3 1.8 6.3 ns t plz 1.8 4.4 6.3 1.8 6.3 symbol parameter t a = 0 c to + 70 ct a = 0 c to + 70c unit v cc = + 5.0v v cc = + 5.0v c l = 50 pf c l = 250 pf 16 outputs switching (note 4) (note 5) min max min max t plh propagation delay 1.3 5.8 3.2 8.2 ns t phl a n to b n or b n to a n 1.3 5.8 3.2 8.2 t pzh output enable time 3.9 14.6 ns t pzl 3.9 14.6 t phz output disable time 1.8 6.3 ns t plz 1.8 6.3 t oshl pin-to-pin skew 1.2 ns (note 3) for hl transitions t oslh pin-to-pin skew 2.2 ns (note 3) for lh transitions t ost pin-to-pin skew 2.5 ns (note 3) for hl/lh transitions rochester electronics guarantees performance of its semiconductor products to the original oem specifcations. typical values are for reference purposes only. certain minimum or maximum ratings may be based on product characterization, design, simulation, or sample testing. rochester electronics reserves the right to make changes without further notice to any specifcation herein. 74fr16245 specifcation number 74fr16245-ci(f) rev a
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