MC74AC574DW

MC74AC574DW is an 8-bit, edge-triggered D-type register in the 74AC CMOS family. It stores 8 parallel data bits (D0–D7) on the rising edge of the clock (CLK) and presents them on Q0–Q7. An active-low output enable (OE) tri-states all outputs, allowing the register to share a bus. There is no asynchronous reset; data updates only on clock edges. Supply: typically 4.5–5.5 V (74AC family tolerates ~2–6 V). Inputs are CMOS-compatible. The DW suffix indicates the device’s package variant (e.g., 20-pin DIP/SOIC). Common uses include data buffering, bus interfacing, and temporary storage in microprocessor or digital systems. Pins include D0–D7, CLK, OE, Q0–Q7, Vcc, and GND. For exact pinout and electrical specs, refer to the datasheet.

MC74AC574DW is an octal D-type latch with 3-state outputs. Equivalents include: TI SN74AC574DW/SN74AC574; NXP/Nexperia 74AC574; STMicroelectronics 74AC574 (and 74ACT574); Renesas μPD74AC574. Other compatible families: 74HC574, 74HCT574, 74ACT574. Note: verify timing, voltage thresholds, and package to ensure full compatibility.

MC74AC574DW features:
- 8-bit D-type, edge-triggered register (flip-flop)
- Positive-edge clock (CP) data capture
- 8 D inputs (D0–D7) and 8 Q outputs (Q0–Q7)
- 3-state outputs with an active-low output enable (G)
- Output enable allows tri-state bus sharing
- 4.5–5.5 V supply (CMOS compatible with 5V logic)
- High-speed AC family; low static power
- 20-pin DW package
- Industrial temperature range (-40°C to 125°C) designation commonly supported
Uses: buffering and latching data on a bus, interfacing microprocessors with peripheral devices.

- Pin count: 20 pins (DIP-20 / SOIC-20).
- Function: Octal (8-bit) edge-triggered D-type register with tri-state outputs. D0–D7 are loaded into Q0–Q7 on the rising edge of the clock; outputs are enabled by /OE (active low) and can go to high impedance when /OE is inactive.

- Manufacturer: ON Semiconductor (ON Semi), originally Motorola’s semiconductor division.
- What kind of company: An American multinational corporation that designs, manufactures, and markets semiconductor components and energy‑efficient integrated circuits.

MC74AC574DW is an 8-bit, edge-triggered D-type register with 3-state outputs. Typical application areas:
- 8-bit data storage/registers in digital paths
- Latch/buffer for multiplexed CPU address/data buses (bus interfacing)
- Bus isolation/ buffering between microprocessors and peripherals
- Temporary storage in pipelines and other digital circuits
- Display/data buffering where a shared bus is used
The tri-state outputs enable safe sharing of a common bus without contention, making it suitable for fast, high-density bus architectures in microprocessors and digital systems.

MC74AC574DW comes in a 20-pin wide SOIC (surface-mount) package.