TC74AC138P/F/FT
2014-03-01
1
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC74AC138P, TC74AC138F, TC74AC138FT
3-to-8 Line Decoder
The TC74AC138 is an advanced high speed CMOS 3-to-8 LINE
DECODER fabricated with silicon gate and double-layer metal
wiring C
2
MOS technology.
It achieves the high speed operation similar to equivalent
Bipolar Schottky TTL while maintaining the CMOS low power
dissipation.
When the device is enabled, 3 Binary Select inputs (A, B and
C) determine which one of the outputs (
0Y
-
7Y
) will go low.
When enable input G1 is held low or either
A2G
or
2BG
is
held high, decoding function is inhibited and all outputs go high.
G1,
A2G
, and
2BG
inputs are provided to ease cascade
connection and for use as an address decoder for memory
systems.
All inputs are equipped with protection circuits against static
discharge or transient excess voltage.
Features
• High speed: t
pd
= 5.9 ns (typ.) at V
CC
= 5 V
• Low power dissipation: I
CC
= 8 μA (max) at Ta = 25°C
• High noise immunity: V
NIH
= V
NIL
= 28% V
CC
(min)
• Symmetrical output impedance: |I
OH
| = I
OL
= 24 mA (min)
Capability of driving 50 Ω
transmission lines.
• Balanced propagation delays: t
pLH
∼
−
t
pHL
• Wide operating voltage range: V
CC (opr)
= 2 to 5.5 V
• Pin and function compatible with 74F138
TC74AC138P
TC74AC138F
TC74AC138FT
Weight
DIP16-P-300-2.54A : 1.00 g (typ.)
SOP16-P-300-1.27A : 0.18 g (typ.)
TSSOP16-P-0044-0.65A : 0.06 g (typ.)
Start of commercial production
1986-05
