Texas Instruments SN74ALS05AD, 74ALS series, hex inverter with open-collector outputs, 6 circuits, 1 input per circuit, 14-SOIC surface mount, 4.5V to 5.5V supply, 0°C to 70°C, 54ns propagation delay at 5V/50pF.
| Parameter | Value |
|---|---|
| Series | 74ALS |
| Logic type | Inverter |
| Mounting | Surface Mount |
| Supply voltage | 4.5V ~ 5.5V |
| Current - output high, low | -, 8mA |
| I/O channels | 1 |
| Operating temperature | 0°C ~ 70°C |
| Package | Tube |
| Features | Open Collector |
| Case | 14-SOIC (0.154\", 3.90mm Width) |
| Number of circuits | 6 |
| Input logic level - low | 0.8V |
| Input logic level - high | 2V |
| Max propagation delay @ v, max CL | 54ns @ 5V, 50pF |
The SN74ALS05AD: Six independent inverter gates with open-collector outputs in a 14-SOIC package. Each gate takes a single input.
For a BOM that needs a second-source hedge, the open-collector inverter function is common across the 74ALS family, but pin-for-pin replacement should be qualified against the specific pull-up and load conditions of your design.
The maximum propagation delay is 54 ns at 5V supply with a 50 pF load. That is the worst-case figure from the input crossing 2V to the output falling through 0.8V.
Yes, the SN74ALS05AD is listed with a Tube package option. The device ships in a 14-SOIC surface-mount package.
A functional alternative within the 74ALS family is the SN74ALS11ANS, which is a triple 3-input AND gate — different logic function, same open-collector output structure. For a hex inverter with Schmitt-trigger inputs and wider temperature range, the SN74HCS04PWR covers -40°C to 125°C but uses a totem-pole output, not open-collector. The SN74F00DR is a quad 2-input NAND gate in the 74F family with 5 ns propagation delay, but again totem-pole output. None is a drop-in replacement; verify the output structure and pinout against your board.
An inverter with open-collector output can be used as a buffer if you add an external pull-up resistor and accept the signal inversion — two inverters in series restore the polarity. But the intended use is wired-OR, level translation, or driving loads that require an open drain.
Yes, the SN74ALS05AD is ROHS3 compliant.
The 'D' suffix typically denotes the 14-SOIC package variant. The SN74ALS05AD is the surface-mount 14-SOIC version; the base SN74ALS05A without the D suffix is the through-hole DIP package. Electrical specifications are identical between the two.