M74HC191 4 Bit Synchronous Binary Up/Down Counter

The M74HC191 is an high speed CMOS 4-BIT SYNCHRONOUS UP/DOWN COUNTER fabricated with silicon gate C2MOS technology.

State changes of the counter are synchronous with the LOW-to-HIGH transition of the Clock Pulse Input.

An asynchronous parallel load input overrides counting and loads the data present on the DATA inputs into the flip-flops, which makes it possible to use the circuits as programmable counters. A count enable input serves as the carry/borrow input in multi-stage counters. Control input, Down/ Up, determines whether a circuit counts up or down. A MAX/MIN output and a Ripple Clock output provide overflow/underflow indication and make possible a variety of methods for generating carry/borrow signals in multi-stage counter applications.

All inputs are equipped with protection circuits against static discharge and transient excess voltage

技术特性

HIGH SPEED :
- fMAX = 61 MHz (TYP.) at VCC = 6V
LOW POWER DISSIPATION:
- ICC =4µA(MAX.) at TA=25 °C
HIGH NOISE IMMUNITY:
- VNIH = VNIL = 28 % VCC (MIN.)
SYMMETRICAL OUTPUT IMPEDANCE:
- |IOH| = IOL = 4mA (MIN)
BALANCED PROPAGATION DELAYS:
- tPLH tPHL
WIDE OPERATING VOLTAGE RANGE:
- VCC (OPR) = 2V to 6V
PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 191

M74HC191 订购信息

订购型号	产品状态	美金价格	数量	封装	包装形式	温度范围	材料声明
M74HC191TTR	Active		1000	TSSOP 16	Tape And Reel		M74HC191TTR
M74HC191RM13TR	Active		1000	SO-16	Tape And Reel		M74HC191RM13TR
M74HC191B1R	Active		1000	PDIP 16	Tube		M74HC191B1R

DATASHEET

描述	版本	大小
M74HC191 : DS2406: 4 bit synchronous up/down counters	1	563KB