SN74HC373 Octal Transparent Latch with 3-State Outputs from Texas Instruments
The SN74HC373 is an octal transparent latch IC with 3-state outputs, manufactured by Texas Instruments. It is specifically engineered for high-speed memory interfacing, address/data latching, and signal buffering in embedded and industrial applications. As a non-inverting latch with active-low enable and latch-enable controls, it offers exceptional logic flexibility and system performance enhancement.
Functioning reliably within a 2V to 6V supply range, the SN74HC373 supports standard CMOS and TTL logic levels, making it highly compatible with mainstream digital systems. Through IC Manufacturer, you gain access to verified distribution channels that ensure consistent quality and component traceability for your mission-critical projects.
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Key Technical Specifications and Performance
| Parameter | Value | Unit |
|---|---|---|
| Function | Octal Transparent Latch | – |
| Bit Width | 8 | bits |
| Supply Voltage (Vcc) | 2 to 6 | V |
| Output Type | 3-State | – |
| Input Current (Iin) | ??6 | ??A |
| Output Drive | ?4 | mA |
| Propagation Delay (tpd) | 30 | ns (typ) |
| Package | DIP-20 | – |
Advantages of Using SN74HC373 Over Standard Logic Buffers
- Transparent Latching Capability: Provides real-time data propagation when latch-enable is active and holds data when disabled, essential for controlled signal timing.
- 3-State Outputs: Facilitates easy bus interfacing by allowing multiple devices on shared lines without contention.
- Flexible Logic Compatibility: Operates across a wide supply voltage range supporting both 3.3V and 5V systems, reducing design complexity.
- High Output Drive: Capable of sourcing/sinking current sufficient for TTL-level logic inputs and small signal loads.
- Easy Integration: DIP-20 package with standard pinout supports fast prototyping and through-hole PCBs.
Technical Parameters Summary
| Feature | Description |
|---|---|
| Logic Family | HC CMOS |
| Control Logic | Active LOW OE, Active HIGH LE |
| Operating Temperature | -40??C to +85??C |
| Clock Type | Latch Enable (Transparent Mode) |
| Input Type | Standard CMOS |
| Output Enable | Asynchronous, Active LOW |
Typical Application Scenarios
- Address Bus Latching in Microprocessors
- Data Buffering in Memory-Mapped I/O
- Peripheral Control in Embedded Systems
- Digital Signal Synchronization
- Industrial Automation Interfaces
Frequently Asked Questions (FAQ)
What is the core function of SN74HC373?
The SN74HC373 is designed to store and buffer 8-bit data, providing transparent latching and 3-state output for bus-oriented digital systems. It holds data when latch-enable is low and propagates when high.
Is this IC suitable for 3.3V logic systems?
Yes, the SN74HC373 operates reliably from 2V to 6V, making it compatible with both 3.3V and 5V logic circuits commonly used in modern embedded designs.
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What is the benefit of 3-state outputs?
3-state outputs allow multiple devices to share a common bus without interference, simplifying circuit complexity and reducing the number of required control lines.
Can the SN74HC373 drive standard TTL inputs?
Yes, the high-output drive capability allows this IC to reliably drive TTL inputs, making it ideal for interfacing with legacy and mixed-logic systems.
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What package is available for prototyping?
The SN74HC373 comes in a DIP-20 package, which is well-suited for breadboards and through-hole PCB designs, accelerating development and testing cycles.
