7438 IC Quad 2-Input NAND Buffer DIP-14

7438 IC Quad 2-Input NAND Buffer DIP-14

The 7438 IC features four 2-input NAND gates with open-collector outputs and high current sinking capability. It fits into a standard 14-pin DIP or SOIC package. Each output acts like a switch to ground and requires a pull-up resistor to define a HIGH logic level. These open-collector outputs allow the IC to connect directly to external loads or higher voltage rails—up to 30V.

You can use the 7438 to drive high-current devices, such as relays, lamps, or buzzers. The strong sinking capability—up to 48 mA per output—makes it ideal for circuits that need direct load control or logic-to-load interfacing. This IC also supports wired-AND logic, where multiple outputs connect to a shared pull-up line to produce a combined logic function.

Its TTL-compatible inputs simplify integration into 7400-series logic systems. The 7438 serves well in control systems, signal drivers, and timing circuits that demand robust output behavior.

Key Features

• Four 2-input NAND gates with open-collector outputs

• Sinks up to 48 mA per output

• Interfaces with external voltages up to 30V

• Requires external pull-up resistors

• Supports wired-AND logic configurations

• TTL-compatible input logic

• Available in DIP-14 and SOIC-14 packages

Applications

1. Use it to drive high-current devices like motors or indicators.

2. Connect it to relays or solenoids in industrial control circuits.

3. Switch higher voltages using its open-collector outputs.

4. Create wired-AND logic by combining outputs on a single pull-up.

5. Interface logic circuits with external voltage domains safely.

6. Add it to automation systems that require load switching.

7. Build timing or pulse-shaping circuits with load-driving capability.

8. Drive LEDs or lamps without additional switching transistors.

9. Enable safe signal interfacing in mixed-voltage designs.

10. Use it in labs or projects that demonstrate open-collector behavior.

Specifications Table