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SN74HC574N DIP-20 Octal D-Type Flip-Flop 3-State Output (5-Pack)
SN74HC574N DIP-20 Octal D-Type Flip-Flop 3-State Output (5-Pack)
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SN74HC574N DIP-20 Octal D-Type Flip-Flop with 3-State Outputs
The SN74HC574N is an octal (8-bit) D-type edge-triggered flip-flop with 3-state outputs in a DIP-20 through-hole package. Operating from 2V to 6V, it captures 8-bit data on the rising edge of the clock and drives or tri-states the outputs via the OE pin — a fundamental building block for bus interfacing, data registers, and address latching.
Key Specifications
| Parameter | Value |
|---|---|
| Part Number | SN74HC574N |
| Package | DIP-20 |
| Logic Family | 74HC CMOS |
| Supply Voltage | 2V – 6V |
| Number of Bits | 8 (octal) |
| Trigger | Rising edge clock |
| Output Type | 3-State (tri-state) |
| Propagation Delay | ~13ns @ VCC=5V |
| Output Drive Current | ±6mA @ VCC=4.5V |
| Quantity | 5 pieces |
Why Choose SN74HC574N?
- 8-Bit Parallel Latch — Captures full byte in one clock cycle for efficient data handling
- 3-State Outputs — OE pin enables bus sharing without signal contention
- Wide Supply Range — 2V–6V covers 3.3V and 5V systems
- High Drive Strength — ±6mA output current drives bus lines directly
- DIP-20 Package — Breadboard-friendly for prototyping and repair
Typical Applications
- 8-bit data bus latching and buffering
- Address register in microprocessor/microcontroller systems
- Output port expansion for Arduino/STM32
- Pipeline registers in digital logic designs
- Memory address latching (SRAM, EEPROM interfaces)
Compatible With
Pin-compatible with 74HC574, 74HCT574 (TTL-input version), 74LS574, 74F574. Works with 74HC245 (bus transceiver) in bidirectional bus designs.
FAQ
Q: What's the difference between 74HC574 and 74HC374?
A: Both are octal D flip-flops with 3-state outputs. 74HC574 has inverted output enable (active-low OE); 74HC374 has the same but different pinout — outputs on opposite side of the package.
Q: Can SN74HC574N interface with 3.3V MCUs?
A: At VCC=3.3V it operates correctly. Input thresholds scale with VCC, so 3.3V logic levels are fully compatible.
Package Contents
- 5× SN74HC574N DIP-20 Octal D-Type Flip-Flop
