SN7438N

Quadruple 2-input positive-NAND buffer logic IC engineered with high-voltage open-collector output transistors rated to withstand up to 12V back-EMF spikes. | 14-Pin Plastic Dual In-line Package (PDIP14) | Automated industrial solenoid driver grids, vintage alphanumeric gas-discharge display matrices, legacy computer indicator rails, bus-organized communications lines. | SN7438N | NTE7438 | SK7438 | 7438, SN7438, SN74LS38N, Signetics N7438A, Texas Instruments 7438 Logic Node | Multi-Channel Data Bus Interface Driver: Soldered directly into a custom 8-bit homebrew microprocessor development backplane to safely interface fragile 5V core calculation lines with a high-current, low-impedance external device bus, sinking up to 48mA of loop current per gate cleanly down to ground. | Texas Instruments Industrial Interface Modules: This classic open-collector quad NAND buffer was heavily chosen by designers throughout the 1970s and 1980s to drive critical multi-point communication trunks, famously handling interface line routing tasks inside the printer controllers of IBM 360/370 mainframe systems and master data bus selection paths within Modicon 484 Programmable Logic Controllers.