Texas Instruments CD54HC138
The CDx4HC(T)138 and '238 are three to eight decoders with one standard output strobe (G2) and two active low output strobes (G 1 and G 0). When the outputs are gated by any of the strobe inputs, they are all forced into the high state.| Part No. | CD54HC138 |
|---|---|
| Datasheet | CD54HC138 Download |
| Manufacturer |  Texas Instruments |
| Description | High-Speed CMOS Logic 3 to 8-Line Decoder/Demultiplexer Inverting/Noninverting |
| Buy | Stock & Price |
FEATURES
● Select one of eight data outputs: – Active low for '138 – Active high for '238● l/O port or memory selector
● Three enable inputs to simplify cascading
● Typical propagation delay of 13 ns at VCC = 5 V, CL = 15 pF, TA = 25°C
● Fanout (over temperature range) – Bus driver outputs: 15 LSTTL loads – Standard outputs: 10 LSTTL loads
● Wide operating temp range: -55°C to 125°C
● Balanced propagation delay and transition times
● Significant power reduction compared to LSTTL logic ICs
● HC types – 2 V to 6 V operation – High noise immunity: NIL = 30%, NIH = 30% of VCC at VCC = 5 V
● HCT types – 4.5-V to 5.5-V operation – Direct LSTTL input logic compatibility, VIL= 0.8 V (Max), VIH = 2 V (Min) – CMOS input compatibility, Il ≤ 1µA at VOL, VOH 3:8 DECODER OUTPUT ENABLE 000 A0 Y0 001 A1 Y1 010 A2 Y2 011 G0 Y3 100 G1 Y4 101 G2 Y5 110 Y6 111 Y7 2
DESCRIPTION
When the outputs are not disabled by the strobe inputs, only the selected output is low while all others are high. The CDx4HC(T)238 is a three to eight decoder with one standard output strobe (G2) and two active low output strobes (G 1 and G 0).
