SN74HC574N-P Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
SN74HC574N-P is an octal edge-triggered D-type flip-flop with 3-state outputs in the HC CMOS logic family, operating from 2 V to 6 V supply. It captures 8 bits of data on the rising edge of the clock and drives the outputs when output enable is asserted. Packaged in a 20-pin DIP, it is suited for data bus buffering, register files, and parallel port latching.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- SN74HC574N-P Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 8 independent edge-triggered D flip-flops in a single package
- 3-state outputs allow multiple devices to share a common data bus
- HC CMOS logic family operating from 2 V to 6 V supply
- Rising-edge clock capture ensures deterministic data latching
- Active-low output enable for bus sharing and isolation
- 20-pin DIP package for breadboard and through-hole prototyping
Applications
The SN74HC574N-P is widely used as an 8-bit output port latch or bus buffer in microprocessor and microcontroller interface designs. Its 3-state output capability enables multiple octal registers to share a single 8-bit data bus without contention. The device also appears in FPGA expansion boards, memory address latches, and educational prototyping platforms requiring reliable parallel data storage.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SN74HC574N-P:
Frequently Asked Questions
How many flip-flop stages does the SN74HC574N-P contain, and on which clock edge does it capture data?
The device integrates 8 D-type flip-flops that all capture input data simultaneously on the rising edge of the shared clock signal. With 3-state outputs controlled by an active-low output enable pin, all 8 bits can be disconnected from the bus within nanoseconds, preventing contention when multiple 8-bit registers share a common data bus operating at 2 V to 6 V.
In a microcontroller peripheral expansion design, how do the 3-state outputs of this flip-flop benefit bus sharing?
When the active-low output enable pin is deasserted high, all 8 outputs enter a high-impedance state, effectively disconnecting the register from the bus. This allows multiple SN74HC574N-P devices to share a single 8-bit data bus without driver contention, provided only one device drives the bus at a time. The HC-family output can sink or source 7.8 mA per pin at 5 V supply.
What supply voltage range does this octal register support, and is it compatible with both 3.3 V and 5 V logic systems?
The SN74HC574N-P operates from 2 V to 6 V supply, covering both 3.3 V and 5 V digital logic standards. At 3.3 V the typical propagation delay from clock to output is approximately 12 ns, while at 5 V it reduces to around 8 ns. This flexibility allows the device to interface directly with a wide range of CMOS processors without external level shifters.
For a through-hole prototype requiring 8-bit data latching, why choose the 20-pin DIP package variant?
The 20-pin DIP package with 2.54 mm through-hole pitch is directly insertable into standard breadboards and perfboards, enabling rapid circuit prototyping without soldering SMD components. Each pin is rated for the full HC-family drive current of 7.8 mA, and the 20-pin form factor is a widely available footprint supported by most DIP sockets, making it ideal for lab and educational environments.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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