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74190 Datasheet Synchronous Decade Up/down Counters

Manufacturer: National Semiconductor (now Texas Instruments)

Overview: MM54HC190 MM74HC190 MM54HC191 MM74HC191 January 1988 MM54HC190 MM74HC190 Synchronous Decade Up Down Counters with Mode Control MM54HC191 MM74HC191 Synchronous Binary Up Down Counters with Mode Control.

General Description

These high speed synchronous counters utilize advanced silicon-gate CMOS technology They possess the high noise immunity and low power consumption of CMOS technology along with the speeds of low power Schottky TTL These circuits are synchronous reversible up down counters The MM54HC191 MM74HC191 are 4-bit binary counters and the MM54HC190 MM74HC190 are BCD counters Synchronous operation is provided by having all flip-flops clocked simultaneously so that the outputs change simultaneously when so instructed by the steering logic This mode of operation eliminates the output counting spikes normally associated with asynchronous (ripple clock) counters The outputs of the four master-slave flip-flops are triggered on a low-to-high level transition of the clock input if the enable input is low A high at the enable input inhibits counting The direction of the count is determined by the level of the down up input When low the counter counts up and when high it counts down These counters are fully programmable that is the outputs may be preset to either level by placing a low on the load input and entering the desired data at the data inputs The output will change independent of the level of the clock input This

Key Features

  • Y Level changes on Enable or Down Up can be made regardless of the level of the clock input Y Wide power supply range 2.
  • 6V Y Low quiescent supply current 80 mA maximum (74HC Series) Y Low input current 1 mA maximum Connection Diagram Dual-In-Line Package Load H H L H Enable G L L X H Down Up L H X X Clock Function u Count Up u Count Down X Load X No Change Asynchronous inputs Low input to load sets QA e A QB e B QC e C and QD e D Order Number MM54HC190 191 or MM74HC190 191 Top.

Similar Datasheet

Brand Logo Part Number Description Manufacturer
SGS-THOMSON Logo 74190 4 BIT SYNCHRONOUS UP/DOWN COUNTERS SGS-THOMSON
Texas Instruments Logo 74190 Synchronous Up/Down Counters Texas Instruments

More Datasheets from National Semiconductor (now Texas Instruments)

Part Number Description
74191 Synchronous Up/Down 4-Bit Binary Counter
74192 Up / Down Decade Counter
74198 8-Bit R/L Shift Register
7410 Triple 3 Input NAND Gates
74125 Quad Bus Buffer Gate
74132 Quad 2-Input NAND Gates
74141 1-of-10 Decoder/Driver
74148 8-3 Line Priority Encoder
74150 Data Selectors/Multiplexers
74151 1 of 8 Line Data Selector/Multiplexer

74190 Distributor