ꢀꢁ ꢂꢃ ꢄꢅ ꢆꢇ ꢂ ꢈ ꢉ ꢀꢁ ꢈꢃ ꢄꢅ ꢆꢇ ꢂꢈ
ꢅ
ꢊ
ꢋ
ꢌ
ꢍ
ꢎ
ꢋ
ꢏ
ꢐ
ꢑ
ꢒ
ꢓ
ꢐ
ꢔ
ꢁ
ꢑ
ꢆ
ꢕ
ꢇ
ꢓ
ꢐ
ꢔ
ꢁ
ꢑ
ꢍ
ꢌ
ꢆ
ꢌ
ꢀ
ꢑ
ꢐ
ꢑ
ꢆ
ꢕ
ꢎ
ꢀ
ꢖ
ꢗ
ꢋ
ꢐ
ꢆ
ꢔ
ꢏ
ꢐ
ꢑ
ꢘ
ꢑ
ꢎ
ꢀ
SCLS071D − NOVEMBER 1988 − REVISED OCTOBER 2003
D
D
Operating Voltage Range of 4.5 V to 5.5 V
D
D
D
D
6-mA Output Drive at 5 V
High-Current Outputs Drive Up To 15
LSTTL Loads
Low Input Current of 1 µA Max
Inputs Are TTL-Voltage Compatible
Buffered Inputs and Outputs
D
Typical t = 15 ns
pd
D
Low Power Consumption, 80-µA Max I
CC
SN54HCT157 . . . J OR W PACKAGE
SN74HCT157 . . . D OR N PACKAGE
(TOP VIEW)
SN54HCT157 . . . FK PACKAGE
(TOP VIEW)
A/B
1A
1
2
3
4
5
6
7
8
V
CC
G
16
15
14
13
12
3
2
1
20 19
18
4A
4B
NC
4Y
1B
1Y
NC
2A
2B
4
5
6
7
8
1B
4A
4B
4Y
17
16
15
1Y
2A
2B
11 3A
14 3A
9 10 11 12 13
10
9
2Y
3B
3Y
GND
NC − No internal connection
description/ordering information
These data selectors/multiplexers contain inverters and drivers to supply full data selection to the four output
gates. A separate strobe (G) input is provided. A 4-bit word is selected from one of two sources and is routed
to the four outputs.
ORDERING INFORMATION
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
†
PACKAGE
T
A
PDIP − N
SOIC − D
Tube of 25
Tube of 40
Reel of 2500
Reel of 250
Tube of 25
Tube of 150
Tube of 55
SN74HCT157N
SN74HCT157D
SN74HCT157DR
SN74HCT157DT
SNJ54HCT157J
SNJ54HCT157W
SNJ54HCT157FK
SN74HCT157N
−40°C to 85°C
HCT157
CDIP − J
CFP − W
LCCC − FK
SNJ54HCT157J
SNJ54HCT157W
SNJ54HCT157FK
−55°C to 125°C
†
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are
available at www.ti.com/sc/package.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright 2003, Texas Instruments Incorporated
ꢋ ꢁ ꢐꢑꢀꢀ ꢕ ꢆꢄ ꢑꢎꢙ ꢔꢀ ꢑ ꢁ ꢕꢆꢑꢍ ꢚꢛ ꢜꢝ ꢞꢟꢠ ꢡꢢꢣ ꢤꢚ ꢠꢟ ꢤꢚꢥ ꢜꢤꢝ ꢏꢎ ꢕ ꢍ ꢋ ꢅꢆ ꢔꢕ ꢁ
ꢚ
ꢍ
ꢌ
ꢆ
ꢌ
ꢜ
ꢤ
ꢦ
ꢟ
ꢧ
ꢢ
ꢥ
ꢚ
ꢜ
ꢟ
ꢤ
ꢠ
ꢡ
ꢧ
ꢧ
ꢣ
ꢤ
ꢚ
ꢥ
ꢝ
ꢟ
ꢦ
ꢨ
ꢡ
ꢩ
ꢪ
ꢜ
ꢠ
ꢥ
ꢚ
ꢜ
ꢟ
ꢤ
ꢞ
ꢥ
ꢣ
ꢫ
ꢏ
ꢧ
ꢟ
ꢞ
ꢡ
ꢠ
ꢚ
ꢝ
ꢠ
ꢟ
ꢤ
ꢦ
ꢟ
ꢧ
ꢢ
ꢚ
ꢟ
ꢝ
ꢨ
ꢣ
ꢠ
ꢜ
ꢦ
ꢜ
ꢠ
ꢥ
ꢚ
ꢜ
ꢟ
ꢤ
ꢝ
ꢨ
ꢣ
ꢧ
ꢚ
ꢛ
ꢣ
ꢚ
ꢣ
ꢧ
ꢢ
ꢝ
ꢟ
ꢦ
ꢆ
ꢣ
ꢬ
ꢥ
ꢝ
ꢔ
ꢤ
ꢝ
ꢚ
ꢧ
ꢡ
ꢢ
ꢣ
ꢤ
ꢚ
ꢝ
ꢝ
ꢚ
ꢥ
ꢤ
ꢞ
ꢥ
ꢧ
ꢞ
ꢭ
ꢥ
ꢧ
ꢧ
ꢥ
ꢤ
ꢚ
ꢮ
ꢫ
ꢏ
ꢧ
ꢟ
ꢞ
ꢡ
ꢠ
ꢚ
ꢜ
ꢟ
ꢤ
ꢨꢥ ꢧ ꢥ ꢢ ꢣ ꢚ ꢣ ꢧ ꢝ ꢫ
ꢨ
ꢧ
ꢟ
ꢠ
ꢣ
ꢝ
ꢝ
ꢜ
ꢤ
ꢯ
ꢞ
ꢟ
ꢣ
ꢝ
ꢤ
ꢟ
ꢚ
ꢤ
ꢣ
ꢠ
ꢣ
ꢝ
ꢝ
ꢥ
ꢧ
ꢜ
ꢪ
ꢮ
ꢜ
ꢤ
ꢠ
ꢪ
ꢡ
ꢞ
ꢣ
ꢚ
ꢣ
ꢝ
ꢚ
ꢜ
ꢤ
ꢯ
ꢟ
ꢦ
ꢥ
ꢪ
ꢪ
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265