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M74HC161M1R-M74HC161RM13TR-M74HC161TTR
SYNCRONOUS PRESETTABLE 4-BIT BINARY COUNTER, WITH ASYNCHRONOUS CLEAR
1/12July 2001 HIGH SPEED :
fMAX = 62 MHz (TYP.) at VCC = 6V LOW POWER DISSIPATION:CC =4μA(MAX.) at TA =25°C HIGH NOISE IMMUNITY:NIH = VNIL = 28 % VCC (MIN.) SYMMETRICAL OUTPUT IMPEDANCE:
|IOH| = IOL = 4mA (MIN) BALANCED PROPAGATION DELAYS:
tPLH ≅ tPHL WIDE OPERATING VOLTAGE RANGE:CC (OPR) = 2V to 6V PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 161
DESCRIPTIONThe M74HC161 is an high speed CMOS
SYNCHRONOUS 4-BIT BINARY
PRESETTABLE COUNTER fabricated with silicon
gate C2 MOS technology.
The CLOCK input is active on the rising edge.
Both LOAD and CLEAR inputs are active LOW.
Presetting is synchronous on the rising edge of
the clock, the function is cleared asynchronously.
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.
M74HC161SYNCHRONOUS PRESETTABLE 4-BIT COUNTER
PIN CONNECTION AND IEC LOGIC SYMBOLS
ORDER CODES
M74HC1612/12
INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION
TRUTH TABLE X : Don’t Care
A, B, C, D : Logic level of data inputs
Carry : CARRY = TE·QA·QB·QC·QD
LOGIC DIAGRAM This logic diagram has not be used to estimate propagation delays
M74HC1613/12
TIMING CHART
ABSOLUTE MAXIMUM RATINGS Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied
(*) 500mW at 65 °C; derate to 300mW by 10mW/°C from 65°C to 85°C
M74HC1614/12
RECOMMENDED OPERATING CONDITIONS
DC SPECIFICATIONS
M74HC1615/12
AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6ns)
