SN54HC574 and SN74HC574 are octal edge-triggered D-type flip-flops with 3-state outputs. They are suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers. They feature high-current 3-state noninverting outputs that can drive bus lines directly or up to 15 LSTTL loads. They have a bus-structured pinout and are available in various package options.
The SN54HC574 and SN74HC574 are octal edge‑triggered D‑type flip‑flops featuring high‑current 3‑state outputs designed for bus‑driving applications such as buffer registers, bidirectional bus drivers and working registers. They provide a buffered output‑enable input that can place each output in a normal logic state or a high‑impedance state, allowing direct bus line driving without additional pull‑up components.
The datasheet includes detailed electrical characteristics, recommended operating conditions, package options, and parameter measurement procedures. It also contains the standard Texas Instruments product notice regarding warranties, critical‑application usage, and availability.
| Operating temperature (SN54HC574) | -55 °C to 125 °C |
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It is qualified for operation from –55 °C to 125 °C.