Datasheet for the 74HC595 and 74HCT595 8-bit serial-in, parallel-out shift register with output latches. It details the pinout, truth table, timing for shift and storage clocks, output enable behaviour and supply limits; the HCT version accepts TTL input levels. Technicians use it when repairing LED drivers, display boards and control panels that chain these chips. At 844 KB this is the longer edition, so compare package type, such as DIP, SO or TSSOP, to the part fitted on your board.
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