The SN74ALS21ADR is a high-performance, technologically advanced integrated circuit (IC) produced by Texas Instruments, a renowned global semiconductor company.

• Series: SN74 series
• Type: dual 4-input positive-NAND gate device
• Boolean function: Y = A + B + C + D or Y = A . B . C . D in positive logic
• Application: digital systems where high speed, low power consumption, and logic level conversion are required
• Feature: Schottky-clamped circuitry
• Input/Output: direct, positive-reinforced logic (PRL) inputs and outputs
• Package: 8-pin SOIC (Small Outline Integrated Circuit) package
• Voltage Range: 4.5 to 5.5 volts
• VOH Level: 2.4 volts
• Temperature Range: -40 to 85 degrees Celsius