TEXAS INSTRUMENTS 74HC574 D-Type Flip-Flop DIP20 15ns 60MHz 7.8mA

The CD74HC574E is a high-speed octal D-type flip-flop with 3-state outputs and bus-driving capability, designed to replace LSTTL logic ICs while offering significant power reduction. Manufactured by Texas Instruments, this positive-edge-triggered device features eight flip-flops that capture data on the low-to-high transition of the clock (CP). The outputs are controlled by an active-low output enable (OE), which when high, places the outputs in a high-impedance state, allowing multiple devices to share a common bus.

With a propagation delay of 15ns and a maximum clock frequency of 60MHz, the IC delivers balanced propagation delays and transition times for reliable high-speed operation. It offers high noise immunity and is fully compatible with both LSTTL and CMOS input logic levels, making it versatile for mixed-technology designs. The device can drive up to 15 LSTTL loads on the bus driver outputs and 10 LSTTL loads on standard outputs, ensuring robust performance in demanding applications.

Features at a glance:

• Octal positive-edge-triggered D-type flip-flops
• Three-state outputs with common output enable control
• Bus line driving capability
• Buffered inputs for improved noise margin
• Balanced propagation delay and transition times
• Significant power reduction compared to LSTTL logic
• High noise immunity
• Direct LSTTL input logic compatibility
• CMOS input compatibility
• 10 LSTTL load (standard outputs) and 15 LSTTL load (bus driver outputs)

Typical applications include communications, networking, and industrial control systems, where reliable data storage and bus interfacing are essential. The CD74HC574E is supplied in a 20-pin DIP package, with an operating temperature range from -55°C to +125°C, and operates over a supply voltage range of 2V to 6V.