The TC74HC173AF is a high-speed CMOS quad D-type flip-flop with 3-state outputs fabricated with silicon gate CMOS technology. It features four D-type flip-flops with a common clock and a common clear input. Each flip-flop has a 3-state output that can be independently enabled or disabled.

Applications

• Buffer registers
• Address registers
• Memory storage
• Data latches
• Microprocessor systems

Features

• High-speed operation: fmax = 45 MHz (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: 10 LSTTL loads
• Symmetrical output impedance: |IOH| = IOL = 4 mA (min.)
• Balanced propagation delays: tPLH ≈ tPHL
• Wide operating voltage range: VCC(opr) = 2 V to 6 V
• 3-state outputs for bus-oriented applications

Benefits

• High-speed operation enables fast data storage and retrieval.
• Low power consumption makes it suitable for battery-powered and energy-efficient systems.
• High noise immunity ensures reliable operation in noisy environments.
• Strong output drive capability allows for direct interfacing with other logic circuits.
• Balanced propagation delays simplify timing design.
• Wide operating voltage range allows the device to be used in various system configurations.
• 3-state outputs allow multiple devices to share a common bus.

Additional Details

The TC74HC173AF features a common clock and clear input for all four flip-flops. The outputs are enabled by two enable inputs, OE1 and OE2. When both OE1 and OE2 are low, the outputs are enabled. When either OE1 or OE2 is high, the outputs are in the high-impedance state. Data is loaded into the flip-flops on the rising edge of the clock signal when the enable inputs (G1 and G2) are low. Clearing the device is accomplished by applying a high level to the Clear input.

The TC74HC173AF is available in a SOP16 (Small Outline Package) and operates over a wide temperature range, typically -40°C to +85°C.