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SN74LS190 - PRESETTABLE BCD/DECADE UP/DOWN COUNTERS

Download the SN74LS190 datasheet PDF. This datasheet also covers the SN74LS190D variant, as both devices belong to the same presettable bcd/decade up/down counters family and are provided as variant models within a single manufacturer datasheet.

General 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.

Key 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 (SN74LS190D_MotorolaInc.pdf) that lists specifications for multiple related part numbers.

📁 Similar Datasheet

Part Number Description Manufacturer
SN74LS190 SYNCHRONOUS UP/DOWN COUNTERS Texas Instruments
SN74LS191 SYNCHRONOUS UP/DOWN COUNTERS Texas Instruments
SN74LS192 UP/DOWN COUNTER ON Semiconductor
SN74LS192 SYNCHRONOUS 4-BIT UP/DOWN COUNTERS Texas Instruments
SN74LS193 SYNCHRONOUS 4-BIT UP/DOWN COUNTERS Texas Instruments

Other Datasheets by Motorola Semiconductor (now NXP Semiconductors)

Part Number Description
SN74LS191 PRESETTABLE BCD/DECADE UP/DOWN COUNTERS
SN74LS192 PRESETTABLE BCD/DECADEUP/DOWN COUNTER
SN74LS193 PRESETTABLE 4-BIT BINARYUP/DOWN COUNTER
SN74LS194A 4-BIT BIDIRECTIONAL UNIVERSAL SHIFT REGISTER
SN74LS195A UNIVERSAL 4-BIT SHIFT REGISTER

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet 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.