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SN54LS168 - BCD DECADE/MODULO 16 BINARY SYNCHRONOUS BI-DIRECTIONAL COUNTERS

General Description

The SN54/74LS168 and SN54/74LS169 use edgetriggered D-type flip-flops that have no constraints on changing the control or data input signals in either state of the Clock.

Key Features

  • 9.05 6.10 Ċ 0.39 19.55 7.36 4.19 0.53 INCHES MIN MAX 0.750 0.240 Ċ 0.015 0.770 0.290 0.165 0.021 1.27 BSC 1.40 1.77 0.050 BSC 0.055 0.

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Other Datasheets by Motorola Semiconductor (now NXP Semiconductors)

Part Number Description
SN54LS160A BCD DECADE COUNTERS/ 4-BIT BINARY COUNTERS
SN54LS164 SERIAL-IN PARALLEL-OUT SHIFT REGISTER
SN54LS165 8-BIT PARALLEL-TO-SERIAL SHIFT REGISTER
SN54LS166 8-BIT SHIFT REGISTERS
SN54LS10 TRIPLE 3-INPUT NAND GATE

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.

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BCD DECADE/MODULO 16 BINARY SYNCHRONOUS BI-DIRECTIONAL COUNTERS The SN54 / 74LS168 and SN54 / 74LS169 are fully synchronous 4-stage up/down counters featuring a preset capability for programmable operation, carry lookahead for easy cascading and a U/ D input to control the direction of counting. The SN54 / 74LS168 counts in a BCD decade (8, 4, 2, 1) sequence, while the SN54 / 74LS169 operates in a Modulo 16 binary sequence. All state changes, whether in counting or parallel loading, are initiated by the LOW-to-HIGH transition of the clock.