7438 Quad 2-Input NAND Buffer With Open-Collector Outputs
The 7438 is a quad 2-input NAND buffer IC designed for digital logic applications requiring open-collector output functionality. It contains four independent NAND gates, each capable of handling two input signals and producing an inverted logical output.
Features:
- Four independent 2-input positive-NAND buffer gates in a single 14-pin DIP package.
- Open-collector outputs that allow wired-OR and wired-AND configurations, simplifying complex gate implementations.
- Wide supply voltage range from 4.75V to 5.25V, compatible with standard 5V TTL systems.
- High-speed operation with a maximum propagation delay of 32ns at 5V and 45pF load capacitance.
- Sink output current capability of up to 24mA, suitable for driving LEDs, relays, and bus lines.
Specifications:
| Parameter | Value |
|---|---|
| Logic Type | NAND Gate – Buffer |
| Number of Circuits | 4 |
| Number of Inputs | 2 (per gate) |
| Output Type | Open Collector |
| Supply Voltage (VCC) | 4.75VDC to 5.25VDC |
| Input Logic Level – Low | 0.8V (Max.) |
| Input Logic Level – High | 2V (Min.) |
| Output Logic Level – Low | 0.4V (Max.) |
| Output Logic Level – High | 5.5V (Max.) |
| Output Current (Low) | 24mA (Sink) |
| Propagation Delay (tPLH / tPHL) | 32ns @ 5V, 45pF |
| Operating Temperature | 0°C to 70°C |
| Mounting Type | Through Hole |
| Package | 14-PDIP |
Pin Configuration:
Foot print:
Applications:
- Digital logic circuit design.
- Wired-AND / wired-OR bus systems.
- LED and indicator driving circuits.
- Interface circuits between logic families.
- Industrial control logic.
- Embedded system signal conditioning.
- Educational and prototyping applications.
Package Include:
1x 7438 Quad 2-Input NAND Buffer With Open-Collector Outputs.
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