The TC74HC574AF-EL is a high-speed CMOS octal D-type flip-flop with three-state outputs manufactured by Toshiba Semiconductor and Storage. It is fabricated with silicon gate CMOS technology, achieving high-speed operation similar to equivalent Schottky TTL while maintaining the low power dissipation characteristic of CMOS. This device features non-inverting outputs and is suitable for use in bus-oriented applications.

Applications

• Data registers
• Address latches
• Buffer registers
• Line drivers
• Memory interface circuits
• Microcomputer systems

Features

• High-speed operation: tpd = 14 ns (typ.) at VCC = 5V
• Low power dissipation: ICC = 4 μA (max.) at Ta = 25°C
• High noise immunity: VNIH = VNIL = 28 % VCC (min.)
• Output drive capability: 15 LSTTL loads
• Symmetrical output impedance: |IOH| = IOL = 6 mA (min.)
• Balanced propagation delays: tPLH ≈ tPHL
• Wide operating voltage range: VCC = 2 V to 6 V
• Three-state outputs for bus-oriented applications

Benefits

• High-speed performance enables use in time-critical applications.
• Low power consumption reduces system power requirements and extends battery life in portable devices.
• High noise immunity ensures reliable operation in noisy environments.
• Large output drive capability allows direct interfacing with many devices.
• Wide operating voltage range offers flexibility in system design.
• Three-state outputs enable easy sharing of data buses.

Additional Details

The TC74HC574AF-EL consists of eight edge-triggered D-type flip-flops with individual D inputs and Q outputs. The common three-state output control (OE) input, when HIGH, disables all outputs, forcing them to a high-impedance state. Data is transferred to the outputs on the positive-going edge of the clock (CLK) pulse. The device is suitable for applications where high-speed, low-power operation and the ability to drive a bus are required.

The operating temperature range is typically -40°C to +85°C. The package is a SOP20. The -EL suffix likely indicates a specific tape and reel packaging option.