Part # M74HC191 datasheet

Part Manufacturer: ST Microelectronics

ST Microelectronics

Part Description: 4 bit synchronous up/down counters

Part Details:

M74HC191 4 BIT SYNCHRONOUS UP/DOWN COUNTERS s HIGH SPEED : fMAX = 61 MHz (TYP.) at VCC = 6V s LOW POWER DISSIPATION:ICC =4µA(MAX.) at TA=25°C s HIGH NOISE IMMUNITY:VNIH = VNIL = 28 % VCC (MIN.) s SYMMETRICAL OUTPUT IMPEDANCE: DIP SOP TSSOP |IOH| = IOL = 4mA (MIN) s BALANCED PROPAGATION DELAYS:tPLH tPHL ORDER CODES s WIDE OPERATING VOLTAGE RANGE: PACKAGE TUBE T & R VCC (OPR) = 2V to 6V DIP M74HC191B1R s PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 191 SOP M74HC191M1R M74HC191RM13TR TSSOP M74HC191TTR DESCRIPTIONThe M74HC191 is an high speed CMOS 4-BIT input in multi-stage counters. Control input, Down/ SYNCHRONOUS UP/DOWN COUNTER Up, determines whether a circuit counts up or fabricated with silicon gate C2MOS technology. down. A MAX/MIN output and a Ripple Clock State changes of the counter are synchronous output provide overflow/underflow indication and with the LOW-to-HIGH transition of the Clock make possible a variety of methods for generating Pulse Input. carry/borrow signals in multi-stage counter An asynchronous parallel load input overrides applications. counting and loads the data present on the DATA All inputs are equipped with protection circuits inputs into the flip-flops, which makes it possible to against static discharge and transient excess use the circuits as programmable counters. A voltage. count enable input serves as the carry/borrow

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M74HC191.pdf Datasheet