The MC74HCT373N is an octal transparent latch with 3-state outputs manufactured by Fairchild/ON Semiconductor. This device is part of the HCT family of high-speed CMOS logic and features TTL-compatible input thresholds, low power consumption, and high noise immunity. It is designed to temporarily store 8 bits of data.

Applications

• Address latching in microprocessor systems
• Data buffering
• I/O port expansion
• Memory interface
• General-purpose storage

Features

• TTL Compatible Input Thresholds
• High Speed: tPD = 14 ns (typ) at VCC = 5V
• Low Power Dissipation: ICC = 8 μA (max) at TA = 25°C
• High Noise Immunity: VNIL = 0.8 V; VNIH = 2.0 V
• Output Drive Capability: 15 LSTTL Loads
• Symmetrical Output Impedance: |IOH| = IOL = 6 mA
• 3-State Outputs: Allow for connection to a bus system.
• Operating Voltage Range: 4.5 V to 5.5 V

Benefits

• TTL Compatibility: Simplifies interfacing with TTL logic.
• Low Power Consumption: Extends battery life in portable devices.
• High-Speed Operation: Ensures fast data transfer.
• Octal Latch: Stores eight bits of data simultaneously.
• 3-State Outputs: Enables multiplexing and bus-oriented applications.

Additional Details

The MC74HCT373N contains eight D-type latches with a common Enable (LE) input and Output Enable (OE) input. When LE is high, the Q outputs follow the data (D) inputs. When LE is low, the data present at the D inputs at the time LE goes low is latched. The OE input, when high, forces all Q outputs to a high-impedance state. The device is typically supplied in a 20-pin DIP package. Operating temperature ranges from -40°C to +85°C.