CD54/74AC138, CD54/74ACT138,
CD74AC238, CD74ACT238
Data sheet acquired from Harris Semiconductor
SCHS234A
3-to-8-Line Decoders/Demultiplexers
September 1998 - Revised May 2000
Features
Description
• ’AC138, ’ACT138. . . . . . . . . . . . . . . . . . . . . . . . Inverting The ’AC138, ’ACT138, CD74AC238, and CD74ACT238 are
3-to-8-line decoders/demultiplexers that utilize Advanced
CMOS Logic technology. Both circuits have three binary
• CD74AC238, CD74ACT238 . . . . . . . . . . . Non-Inverting
select inputs (A0, A1, and A2). If the device is enabled, these
inputs determine which one of the eight normally HIGH out-
puts of the AC/ACT138 will go LOW or which on of the nor-
mally LOW outputs of the AC/ACT238 will go HIGH. Two
active LOW and one active HIGH enables (E1, E2 and E3)
are provided to simplify the cascading of these devices.
• Buffered Inputs
• Typical Propagation Delay
o
- 5ns at V
CC
= 5V, T = 25 C, C = 50pF
A L
• Exceeds 2kV ESD Protection MIL-STD-883, Method
3015
[ /Title
(CD74
AC138
,
CD74
ACT13
8,
CD74
AC238
,
CD74
ACT23
8)
/Sub-
ject (3-
to-8-
Line
Decod-
ers/De
multi-
plex-
ers)
/Autho
r ()
/Key-
words
(Har-
ris
Ordering Information
• SCR-Latchup-Resistant CMOS Process and Circuit
Design
PART
NUMBER
TEMP.
RANGE ( C)
o
• Speed of Bipolar FAST™/AS/S with Significantly
Reduced Power Consumption
PACKAGE
CD54AC138F3A
CD74AC138E
-55 to 125
o
16 Ld CERDIP
• Balanced Propagation Delays
0 to 70 C, -40 to 85, 16 Ld PDIP
-55 to 125
• AC Types Feature 1.5V to 5.5V Operation and
Balanced Noise Immunity at 30% of the Supply
o
CD74AC138M
0 to 70 C, -40 to 85, 16 Ld SOIC
-55 to 125
• ±24mA Output Drive Current
- Fanout to 15 FAST™ ICs
CD54ACT138F3A
CD74ACT138E
-55 to 125
o
16 Ld CERDIP
0 to 70 C, -40 to 85, 16 Ld PDIP
-55 to 125
- Drives 50Ω Transmission Lines
o
CD74ACT138M
CD74AC238E
CD74AC238M
CD74ACT238E
CD74ACT238M
NOTES:
0 to 70 C, -40 to 85, 16 Ld SOIC
-55 to 125
Pinout
o
0 to 70 C, -40 to 85, 16 Ld PDIP
CD54AC138, CD54ACT138
-55 to 125
(CERDIP)
CD74AC138, CD74ACT138, CD74AC238, CD74ACT238
(PDIP, SOIC)
o
0 to 70 C, -40 to 85, 16 Ld SOIC
-55 to 125
o
TOP VIEW
0 to 70 C, -40 to 85, 16 Ld PDIP
-55 to 125
o
0 to 70 C, -40 to 85, 16 Ld SOIC
-55 to 125
V
A0
A1
A2
E1
E2
E3
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
CC
Y0 AC/ACT138
Y0 AC/ACT238
1. When ordering, use the entire part number. Add the suffix 96 to
obtain the variant in the tape and reel.
Y1 AC/ACT138
Y1 AC/ACT238
Y2 AC/ACT138
Y2 AC/ACT238
Y3 AC/ACT138
Y3 AC/ACT238
Y4 AC/ACT138
Y4 AC/ACT238
Y5 AC/ACT138
Y5 AC/ACT238
2. Wafer and die for this part number is available which meets all elec-
trical specifications. Please contact your local TI sales office or cus-
tomer service for ordering information.
AC/ACT138 Y7
AC/ACT238 Y7
Y6 AC/ACT138
Y6 AC/ACT238
GND
Semi-
con-
ductor,
Advan
ced
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
FAST™ is a Trademark of Fairchild Semiconductor.
1
Copyright © 2000, Texas Instruments Incorporated.