DM74ALS540A is a Octal Inverting Buffer and Line Driver with 3-STATE Outputs product produced by Fairchild Semiconductor Corporation
The DM74ALS540A is an octal inverting buffer and line driver featuring a 3‑STATE control gate. All inputs are placed on one side of the package and all outputs on the opposite side, simplifying PCB layout. The device uses P‑NP inputs to reduce DC loading and offers a data‑flow‑through pinout.
Key specifications include a nominal supply voltage of 5 V, input HIGH level of 2 V, input LOW level of 0.7 V, and output HIGH/LOW currents of –15 mA and 24 mA respectively. The part is available in SOIC, SOP, and PDIP packages with detailed mechanical dimensions and land‑pattern recommendations provided.
| Supply Voltage (VCC) Min/Typ/Max | 4.5 V / 5 V / 5.5 V |
|---|---|
| Input HIGH Level Voltage | 2 V |
| Input LOW Level Voltage | 0.7 V |
| Output HIGH Level Voltage | 4.5 V to 5.5 V |
| Operating Temperature Range | 0 °C to 70 °C |
All inputs are on one side of the package and all outputs are on the opposite side, providing a data‑flow‑through layout.
The recommended free‑air operating temperature is from 0 °C to 70 °C.