Texas Instruments SN54ALS27A SN54AS27 SN74ALS27A SN74AS27 Data Sheet Manual
Summary
The SN54ALS27A/SN74ALS27A and SN54AS27/SN74AS27 are triple 3-input positive-NOR gates. These TTL logic devices perform the Boolean function Y = A + B + C in positive logic, with each package containing three independent gates. The ALS and AS versions offer improved speed-power product over standard TTL. Military-grade variants operate from -55°C to 125°C, while commercial versions span 0°C to 70°C. Available in DIP, SOIC, and ceramic chip carrier packages. Target users are digital logic designers, system engineers, and electronics manufacturers who need reliable, high-speed combinational logic for computing, control systems, and digital signal processing applications.
Manual Details
| Brand | Texas Instruments |
|---|---|
| Pages | 16 |
| File Size | 665.63 KB |
| Published | June 16, 2026 |
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Frequently Asked Questions
What is the Boolean function performed by this logic gate?
Y = A • B • C or Y = A + B + C in positive logic.
What is the supply voltage range (Vcc) for operation?
The recommended supply voltage range is 4.5 V to 5.5 V.
What is the operating temperature for the commercial (SN74) version?
The SN74ALS27A operates from 0°C to 70°C.