The TC74HC377P is an Octal D-Type Flip-Flop with Enable manufactured by Toshiba Semiconductor and Storage. This device features eight D-type flip-flops with a common clock (CLK) and a clock enable (EN) input. Data present at the D inputs is stored in the flip-flops on the positive-going edge of the clock pulse, provided the clock enable input is low. When the clock enable input is high, the clock signal is inhibited, and the flip-flops retain their previous state. This allows for selectively updating the stored data.

Applications

• Buffer Registers
• Shift Registers
• Memory Address Registers
• Data Storage in Microprocessor Systems
• High-Speed Logic Systems

Features

• High-Speed Operation: tpd = 13 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: 10 LSTTL Loads
• Symmetrical Output Impedance: |IOH| = IOL = 4 mA (min.)
• Wide Operating Voltage Range: VCC = 2V to 6V
• Clock Enable Input for Selective Data Storage

Benefits

• Improved System Performance: High-speed operation reduces propagation delays, leading to faster overall system performance.
• Reduced Power Consumption: Low power dissipation minimizes energy usage and heat generation, making it suitable for battery-powered applications.
• Enhanced Noise Immunity: High noise immunity ensures reliable operation in noisy environments, preventing false triggering.
• Increased Output Drive Capability: Drives a significant number of loads, simplifying interfacing with other devices.
• Simplified System Design: Clock enable input allows for selective data updates, reducing the need for complex control logic.
• Wide Operating Voltage Range: Provides flexibility in power supply selection and allows operation in various voltage environments.
• Efficient Data Handling: Stores eight bits of data in a single package, enabling efficient data storage and retrieval.

Additional Details

The TC74HC377P consists of eight edge-triggered D-type flip-flops. The EN input controls the clock signal. When EN is low, the flip-flops respond to the positive-going edge of the clock. When EN is high, the clock signal is effectively disabled, preventing any change in the flip-flop outputs. The outputs (Q0-Q7) provide the stored data.

This device is available in a plastic Dual In-Line Package (DIP), making it easy to handle and install on printed circuit boards. The operating temperature range is typically -40°C to +85°C. For optimal performance, proper power supply decoupling is recommended. Refer to the official Toshiba datasheet for complete electrical characteristics and application information.