SN74LS161A Datasheet, PDF (1/8 Pages) ON Semiconductor – BCD Decade Counters 4−Bit Binary Counters

SN74LS161A, SN74LS163A
BCD Decade Counters/
4−Bit Binary Counters
The LS161A/163A are high-speed 4-bit synchronous counters.
They are edge-triggered, synchronously presettable, and cascadable
MSI building blocks for counting, memory addressing, frequency
division and other applications. The LS161A and LS163A count
modulo 16 (binary).
The LS161A has an asynchronous Master Reset (Clear) input that
overrides, and is independent of, the clock and all other control inputs.
The LS163A has a Synchronous Reset (Clear) input that overrides all
other control inputs, but is active only during the rising clock edge.
Asynchronous Reset
Synchronous Reset
Binary (Modulo 16)
LS161A
LS163A
• Synchronous Counting and Loading
• Two Count Enable Inputs for High Speed Synchronous Expansion
• Terminal Count Fully Decoded
• Edge-Triggered Operation
• Typical Count Rate of 35 MHz
• ESD > 3500 Volts
GUARANTEED OPERATING RANGES
Symbol
Parameter
Min Typ Max Unit
V_CC
Supply Voltage
T_A
Operating Ambient
Temperature Range
4.75 5.0 5.25
V
0
25
70
°C
I_OH
Output Current − High
I_OL
Output Current − Low
−0.4 mA
8.0
mA
© Semiconductor Components Industries, LLC, 2006
1
July, 2006 − Rev. 2
http://onsemi.com
LOW
POWER
SCHOTTKY
16
1
PLASTIC
N SUFFIX
CASE 648
16
1
SOIC
D SUFFIX
CASE 751B
16
1
SOEIAJ
M SUFFIX
CASE 966
ORDERING INFORMATION
Device
Package
Shipping
SN74LS161AN
16 Pin DIP 2000 Units/Box
SN74LS161AD
SOIC−16
38 Units/Rail
SN74LS161ADR2 SOIC−16 2500/Tape & Reel
SN74LS161AM SOEIAJ−16 See Note 1
SN74LS161AMEL SOEIAJ−16 See Note 1
SN74LS163AN
16 Pin DIP 2000 Units/Box
SN74LS163AD
SOIC−16
38 Units/Rail
SN74LS163ADR2 SOIC−16 2500/Tape & Reel
SN74LS163AM SOEIAJ−16 See Note 1
SN74LS163AMEL SOEIAJ−16 See Note 1
1. For ordering information on the EIAJ version of
the SOIC package, please contact your local
ON Semiconductor representative.
Publication Order Number:
SN74LS161A/D