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MC74HC161A-MC74HC161ADR2-MC74HC161AFEL-MC74HC161AN-MC74HC163A-MC74HC163AD-MC74HC163ADR2-MC74HC163AFEL
Presettable Counter
MC74HC161A,
MC74HC163A
Presettable Counters
High–Performance Silicon–Gate CMOSThe MC74HC161A and HC163A are identical in pinout to the
LS161 and LS163. The device inputs are compatible with standard
CMOS outputs; with pull–up resistors, they are compatible with
LSTTL outputs.
The HC161A and HC163A are programmable 4–bit binary counters
with asynchronous and synchronous reset, respectively. Output Drive Capability: 10 LSTTL Loads Outputs Directly Interface to CMOS, NMOS, and TTL Operating Voltage Range: 2.0 to 6.0 V Low Input Current: 1.0 �A High Noise Immunity Characteristic of CMOS Devices In Compliance with the Requirements Defined by JEDEC Standard
No. 7A Chip Complexity: 192 FETs or 48 Equivalent Gates
FUNCTION TABLE*HC163A only. HC161A is an Asynchronous Reset Device
H = high level, L = low level, X = don’t care
Figure 1. Pin AssignmentRESET
CLOCK
GND
RIPPLE
CARRY OUT
VCC
ENABLE P
ENABLE T
LOAD
