Datasheet4U Logo Datasheet4U.com

SN54LS191 - PRESETTABLE BCD/DECADE UP/DOWN COUNTER

Download the SN54LS191 datasheet PDF. This datasheet also covers the SN54LS190 variant, as both devices belong to the same presettable bcd/decade up/down counter family and are provided as variant models within a single manufacturer datasheet.

Description

The LS190 is a synchronous Up / Down BCD Decade Counter and the LS191 is a synchronous Up / Down 4-Bit Binary Counter.

The operating modes of the LS190 decade counter and the LS191 binary counter are identical, with the only difference being the count sequences as noted in the state diagrams.

Features

  • ditions VCC = 5.0 V CL = 15 pF Test Conditions VCC = 5.0 V.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (SN54LS190_MotorolaInc.pdf) that lists specifications for multiple related part numbers.

📁 Similar Datasheet

Part Number Description Manufacturer
SN54LS191 SYNCHRONOUS UP/DOWN COUNTERS Texas Instruments
SN54LS190 PRESETTABLE BCD/DECADE UP/DOWN COUNTER Motorola Inc
SN54LS190 SYNCHRONOUS UP/DOWN COUNTERS Texas Instruments
SN54LS192 PRESETTABLE BCD/DECADE UP/DOWN COUNTER Motorola Inc
SN54LS192 SYNCHRONOUS 4-BIT UP/DOWN COUNTERS Texas Instruments

Other Datasheets by Motorola Semiconductor (now NXP Semiconductors)

Part Number Description
SN54LS193 PRESETTABLE 4-BIT BINARY UP/DOWN COUNTER
SN54LS197 4-STAGE PRESETTABLE RIPPLE COUNTERS
SN54LS136 QUAD 2-INPUT EXCLUSIVE OR GATE
SN54LS14 SCHMITT TRIGGERS DUAL GATE/HEX INVERTER
SN54LS148 10-LINE-TO-4-LINE AND 8-LINE-TO-3-LINE PRIORITY ENCODERS

Full PDF Text Transcription

Click to expand full text
PRESETTABLE BCD/DECADE UP/DOWN COUNTERS PRESETTABLE 4-BIT BINARY UP/DOWN COUNTERS 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.
Published: |