M74HC161
DESCRIPTION s The M74HC161 is an high speed CMOS b SYNCHRONOUS
4-BIT
BINARY
O PRESETTABLE COUNTER fabricated with silicon
- gate C2MOS technology. t(s) The CLOCK input is active on the rising edge.
Both LOAD and CLEAR inputs are active LOW. c Presetting is synchronous on the rising edge of u the clock, the function is cleared asynchronously.
TSSOP
ORDER CODES
PACKAGE
TUBE
DIP SOP TSSOP
M74HC161B1R M74HC161M1R
T&R
M74HC161RM13TR M74HC161TTR
Two enable inputs (TE and PE) and CARRY output are provided to enable easy cascading of counters, which facilities easy implementation of N-bit counters without using external gates. All inputs are equipped with protection circuits against static discharge and transient excess voltage.
Obsolete Prod PIN CONNECTION AND IEC LOGIC SYMBOLS
July 2001
1/12
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN No
SYMBOL NAME AND FUNCTION
CLEAR
Asynchronous Master Reset
CLOCK
Clock Input (LOW to HIGH,...
