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SN74LS569A - FOUR-BIT UP/DOWN COUNTER

Download the SN74LS569A datasheet PDF. This datasheet also covers the SN74LS569DW variant, as both devices belong to the same four-bit up/down counter family and are provided as variant models within a single manufacturer datasheet.

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Note: The manufacturer provides a single datasheet file (SN74LS569DW_MotorolaInc.pdf) that lists specifications for multiple related part numbers.

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Other Datasheets by Motorola Semiconductor (now NXP Semiconductors)

Part Number Description
SN74LS51 DUAL 2-WIDE 2-INPUT / 3-INPUT AND-OR-INVERT GATE
SN74LS54 3-2-2-3-INPUT AND-OR-INVERT GATE
SN74LS55 2-WIDE 4-INPUT AND-OR-INVERT GATE
SN74LS00 QUAD 2-INPUT NAND GATE
SN74LS02 QUAD 2-INPUT NOR 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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FOUR-BIT UP/DOWN COUNTER WITH THREE-STATE OUTPUTS The SN54 / 74LS569A is designed as programmable up/down BCD and Binary counters respectively. These devices have 3-state outputs for use in bus organized systems. With the exception of output enable (OE) and asynchronous clear (ACLR), all functions occur on the positive edge of the clock pulse (CP). When the LOAD input is LOW, the outputs will be programmed by the parallel data inputs (A, B, C, D) on the next clock edge. Enabling of the counters occurs only when CEP and CET are LOW and LOAD is HIGH. Direction of the count is controlled by the up-down input (U/D), HIGH counts up and LOW counts down. High-speed counting and cascading is implemented by internal look-ahead carry logic and an active LOW ripple carry output (RCO).