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Description
74LS Family Counters & Shift Registers, Texas Instruments Texas Instruments range of Counters and Shift Registers from the 74LS Family of Low Power Schottky Logic ICs. The 74LS Family use bipolar junction technology coupled with Schottky diode clamps to achieve operating speeds equal to the original 74TTL family but with much lower power consumption.
Title
Synchronous 4-Bit Up/Down Counters With Up/Down Mode Control
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The SN54/74LS190 is a synchronous UP/DOWN BCD Decade (8421) Counter and the SN54/74LS191 is a synchronous UP/DOWN Modulo-16 Binary Counter. State changes of the counters are synchronous with the LOW-to-HIGH transition of the Clock Pulse input.
An asynchronous Parallel Load (PL) input overrides counting and loads the data present on the Pn inputs into the flip-flops, which makes it possible to use the circuits as programmable counters. A Count Enable (CE) input serves as the carry /borrow input in multi-stage counters. An Up/Down Count Control (U/D) input determines whether a circuit counts up or down. A Terminal Count (TC) output and a Ripple Clock (RC) output provide overflow/underflow indication and make possible a variety of methods for generating carry/borrow signals in multistage counter applications.
● Low Power . . . 90 mW Typical Dissipation
● High Speed . . . 25 MHz Typical Count Frequency
● Synchronous Counting
● Asynchronous Parallel Load
● Individual Preset Inputs
● Count Enable and Up/Down Control Inputs
● Cascadable
● Input Clamp Diodes Limit High Speed Termination Effects
Preview of the first 3 pages of the data sheet
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PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.
SN74LS190, SN74LS191 SYNCHRONOUS UP/DOWN COUNTERS WITH DOWN/UP MODE CONTROLSome Part number from the same manufacture
Same catergory
11 buyer reviews from Singapore
Amanda Davis
Length of registration:7 years
I recently purchased an IC SN74LS191N from your company and I am very pleased with the product. It is a great quality product that is reliable and easy to use. I have been using it in my circuit designs and it has been working perfectly. I am very satisfied with the performance of the IC and would highly recommend it to anyone looking for a reliable IC. Thank you for providing such a great product
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03/17/2023
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SN74LS191N
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