rev.2.00 jan. 14, 2005 page 1 of 7 RD74LVC138B 3-to-8-line decoder / demultiplexer rej03d0502?0200 rev.2.00 jan. 14, 2005 description the RD74LVC138B has three binary select inputs in a 16 pin package. if the device is enabled these inputs determine which one of the eight normally high outputs will go low. two active low and one active high enables are provided to ease the cascading of decoders. low voltage and high-speed ope ration is suitable at the battery drive product (note type personal computer) and low power consumption extend s the life of a battery for long time operation. features ? v cc = 1.65 v to 5.5 v ? all inputs v ih (max.) = 5.5 v (@v cc = 0 v to 5.5 v) ? typical v ol ground bounce < 0.8 v (@v cc = 3.3 v, ta = 25c) ? typical v oh undershoot > 2.0 v (@v cc = 3.3 v, ta = 25c) ? high output current 4 ma (@v cc = 1.65 v) 8 ma (@v cc = 2.3 v) 12 ma (@v cc = 2.7 v) 24 ma (@v cc = 3.0 v to 5.5 v) ? ordering information part name package type package code package abbreviation taping abbreviation (quantity) RD74LVC138Bfpel sop?16 pin (jeita) fp?16dav fp el (2,000 pcs/reel) RD74LVC138Btell tssop?16 pin ttp?16dav t ell (2,000 pcs/reel) function table inputs enable select outputs g1 g2a g2b c b a y0 y1 y2 y3 y4 y5 y6 y7 x x h x x x h h h h h h h h x h x x x x h h h h h h h h l x x x x x h h h h h h h h h l l l l l l h h h h h h h h l l l l h h l h h h h h h h l l l h l h h l h h h h h h l l l h h h h h l h h h h h l l h l l h h h h l h h h h l l h l h h h h h h l h h h l l h h l h h h h h h l h h l l h h h h h h h h h h l h: high level l: low level x: immaterial
RD74LVC138B rev.2.00 jan. 14, 2005 page 2 of 7 pin arrangement (top view) 11 12 13 14 v cc 1 2 3 4 5 6 7 10 a gnd 8 9 15 16 a b c y7 g1 g2b g2a y0 y1 y2 y3 y4 y5 b c g2a g2b g1 y7 y6 y5 y4 y3 y2 y1 y0 y6 absolute maximum ratings item symbol ratings unit conditions supply voltage v cc ?0.5 to 7.0 v input diode current i ik ?50 ma v i = ?0.5 v input voltage v i ?0.5 to 7.0 v ?50 v o = ?0.5 v output diode current i ok 50 ma v o = v cc +0.5 v output voltage v o ?0.5 to v cc +0.5 v output current i o 50 ma v cc , gnd current / pin i cc or i gnd 100 ma storage temperature tstg ?65 to +150 c note: the absolute maximum ratings are values, which must not individually be exceeded, and furthermore, no two of which may be realized at the same time.
RD74LVC138B rev.2.00 jan. 14, 2005 page 3 of 7 recommended operating conditions item symbol ratings unit conditions 1.5 to 5.5 data retention supply voltage v cc 1.65 to 5.5 v at operation v i 0 to 5.5 v a, b, c, g1, g2a , g2b input / output voltage v o 0 to v cc v y0 to y7 operating temperature ta ?40 to 85 c ?4 v cc = 1.65 v ?8 v cc = 2.3 v ?12 v cc = 2.7 v i oh ?24 ma v cc = 3.0 v to 5.5 v 4 v cc = 1.65 v 8 v cc = 2.3 v 12 v cc = 2.7 v output current i ol 24 ma v cc = 3.0 v to 5.5 v 20 v cc = 1.65 v to 2.7 v input rise / fall time *1 t r , t f 10 ns/v v cc = 3.0 v to 5.5 v notes: 1. this item guarantees maxi mum limit when one input switches. waveform: refer to te st circuit of switching characteristics.
RD74LVC138B rev.2.00 jan. 14, 2005 page 4 of 7 electrical characteristics ta = ?40 to 85c item symbol v cc (v) min max unit test conditions 1.65 to 1.95 v cc 0.65 ? 2.3 to 2.7 1.7 ? 2.7 to 3.6 2.0 ? v ih 4.5 to 5.5 v cc 0.7 ? v 1.65 to 1.95 ? v cc 0.35 2.3 to 2.7 ? 0.7 2.7 to 3.6 ? 0.8 input voltage v il 4.5 to 5.5 ? v cc 0.3 v 1.65 to 5.5 v cc ?0.2 ? i oh = ?100 a 1.65 1.2 ? i oh = ?4 ma 2.3 1.7 ? i oh = ?8 ma 2.7 2.2 ? 3.0 2.4 ? i oh = ?12 ma 3.0 2.2 ? v oh 4.5 3.8 ? v i oh = ?24 ma 1.65 to 5.5 ? 0.2 i ol = 100 a 1.65 ? 0.45 i ol = 4 ma 2.3 ? 0.7 i ol = 8 ma 2.7 ? 0.4 i ol = 12 ma 3.0 ? 0.55 output voltage v ol 4.5 ? 0.55 v i ol = 24 ma input current i in 0 to 5.5 ? 5.0 a v in = 5.5 v or gnd 2.7 to 3.6 ? 5.0 v in = 3.6 v to 5.5 v i cc 2.7 to 5.5 ? 5.0 a v in = v cc or gnd quiescent supply current ? i cc 2.7 to 3.6 ? 500 a v in = one input at(v cc ?0.6)v, other inputs at v cc or gnd
RD74LVC138B rev.2.00 jan. 14, 2005 page 5 of 7 switching characteristics ta = ?40 to 85c item symbol v cc (v) min typ max unit from (input) to (output) 1.80.15 1.0 ? 22.0 2.50.2 1.0 ? 9.9 2.7 1.0 ? 7.9 3.30.3 1.0 ? 6.7 t plh t phl 5.00.5 1.0 ? 6.0 ns a, b, c y0 to y7 1.80.15 1.0 ? 21.0 2.50.2 1.0 ? 9.4 2.7 1.0 ? 7.4 3.30.3 1.0 ? 6.5 t plh t phl 5.00.5 1.0 ? 6.0 ns g2a , g2b y0 to y7 1.80.15 1.0 ? 20.3 2.50.2 1.0 ? 8.4 2.7 1.0 ? 6.4 3.30.3 1.0 ? 5.8 propagation delay time t plh t phl 5.00.5 1.0 ? 5.0 ns g1 y0 to y7 1.80.15 ? ? ? 2.50.2 ? ? ? 2.7 ? ? ? 3.30.3 ? ? 1.0 output skew between pins* 1 t oslh t oshl 5.00.5 ? ? 1.0 ns input capacitance c in 3.3 ? 5.0 ? pf note: 1. this parameter is characterized but not tested. t oslh = |t plhm ? t plhn |, t oshl = |t phlm ? t phln | operating characteristics ta = 25c item symbol vcc = (v) min typ max unit test conditions 1.8 ? 25 ? 2.5 ? 26 ? 3.3 ? 27 ? power dissipation capacitance c pd 5.0 ? 30 ? pf f = 10 mhz
RD74LVC138B rev.2.00 jan. 14, 2005 page 6 of 7 test circuit v cc v cc see function table a input pulse generator z = 50 out ? c l r l y0 to y7 b c g1 g2a g2b output note: 1. c l includes probe and jig capacitance. waveforms input 10 % gnd 90 % t r t f 90 % 10 % in phase output v oh v ol t plh t phl out of phase output t phl t plh v oh v ol v ih v ref v ref v ref v ref v ref v ref v cc (v) v ih vref c l r l t r /t f v cc v cc 1/2 v cc 1/2 v cc 1/2 v cc v cc inputs v cc = 1.80.15 v v cc = 2.50.2 v v cc = 3.30.3 v v cc = 5.00.5 v v cc = 2.7 v 2.7 v 1.5 v 1.0 k ? 500 ? 500 ? 500 ? 500 ? 30 pf 30 pf 50 pf 50 pf 50 pf 1.5 v 2.7 v 2 ns 2 ns 2.5 ns 2.5 ns 2.5 ns note: 1. input waveform: p rr = 10 mhz, duty cycle 50%
RD74LVC138B rev.2.00 jan. 14, 2005 page 7 of 7 package dimensions package code jedec jeita mass (reference value) fp-16dav ? conforms 0.24 g *ni/pd/au plating *0.20 0.05 *0.40 0.06 0.12 0.15 m 2.20 max 5.5 10.06 0.80 max 16 9 1 8 10.5 max + 0.20 ? 0.30 7.80 0.70 0.20 0 ? ? 8 ? 0.10 0.10 1.15 1.27 as of january, 2003 unit: mm package code jedec jeita mass (reference value) ttp-16dav ? ? 0.05 g *ni/pd/au plating 0.50 0.10 0? ? 8? *0.15 0.05 6.40 0.20 0.10 1.10 max 0.13 m 0.65 18 16 9 4.40 5.00 5.30 max 0.07 +0.03 ?0.04 0.65 max 1.0 * 0.20 0.05 as of january, 2003 unit: mm
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