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HD74HC393 - Dual 4-bit Binary Counters

Description

The HD74HC393 contain two 4-bit ripple carry binary counters, which can be cascaded to create a single divide-by-256 counter.

The HD74HC393 is incremented on the high to low transition (negative edge) of the clock input, and each has an independent clear input.

Features

  • High Speed Operation: tpd (A to QA) = 16 ns typ (CL = 50 pF) High Output Current: Fanout of 10 LSTTL Loads Wide Operating Voltage: VCC = 2 to 6 V Low Input Current: 1 µA max Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C) Function Table Clock X H L Clear H L L L L Outputs L No change No change No change Advance to next state HD74HC393 Pin Arrangement 1A 1Clear 1QA 1QB 1QC 1QD GND 1 2 3 4 5 6 7 CLR QA QB A A QC QD QC QD CLR Q.

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📁 Similar Datasheet

Part Number Description Manufacturer
HD74HC393 Dual 4-bit Binary Counters Renesas
HD74HC390 Dual Decade Counters Renesas
HD74HC30 8-input NAND Gates Renesas
HD74HC32 Quad. 2-input OR Gates Renesas
HD74HC323 8-bit Universal Shift/Storage Register Renesas

Other Datasheets by Hitachi Semiconductor (now Renesas)

Part Number Description
HD74HC390 Dual Decade Counters
HD74HC30 8-input NAND Gate
HD74HC32 Quad. 2-input OR Gates
HD74HC323 8-bit Universal Shift/Storage Register (with 3-state Outputs)
HD74HC352 Dual 4-to-1-line Data Selectors/Multiplexers

Full PDF Text Transcription

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HD74HC393 Dual 4-bit Binary Counters Description The HD74HC393 contain two 4-bit ripple carry binary counters, which can be cascaded to create a single divide-by-256 counter. The HD74HC393 is incremented on the high to low transition (negative edge) of the clock input, and each has an independent clear input. when clear is set high all four bits of each counter are set to a low level. This enables count trucation and allows the implementation of divide-by-N counter configurations.
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