Texas Instruments SN74LS14DBR, 74LS series, 6-channel Schmitt-trigger inverter, 14-SSOP package, 4.75V–5.25V supply, 22ns @ 5V/15pF propagation delay, 0°C to 70°C operating range.
| Parameter | Value |
|---|---|
| Series | 74LS |
| Logic type | Inverter |
| Mounting type | Surface Mount |
| Voltage | 4.75V ~ 5.25V |
| Current - output high, low | 400µA, 8mA |
| Number of inputs | 1 |
| Operating temperature | 0°C ~ 70°C |
| Package | Tape & Reel (TR); Cut Tape (CT) |
| Features | Schmitt Trigger |
| Case | 14-SSOP (0.209\", 5.30mm Width) |
| Number of circuits | 6 |
| Input logic level - low | 0.5V |
| Input logic level - high | 1.9V |
| Max propagation delay @ v, max CL | 22ns @ 5V, 15pF |
Propagation delay is 22 ns typical at 5V with 15 pF load. Output high 400 µA, output low 8 mA. Input thresholds 0.5V low, 1.9V high.
The 14-SSOP package (0.209 inch body width, 5.30 mm) is a standard fine-pitch SOIC variant. Reel and cut-tape options are both available — cut tape is handy for prototype or small-run builds. No special ESD precautions beyond normal handling; the 74LS family is generally robust.
Yes — the SN74LS14DBR is electrically identical to the 74LS14N but in a surface-mount 14-SSOP package instead of the through-hole DIP. The logic function, thresholds, and timing are the same. For a drop-in replacement on an existing board, verify the footprint matches.
For a drop-in functional replacement, the SN74HCS04PWR (74HCS series) is a modern alternative: six Schmitt-trigger inverters, but operates from 2V to 6V, has faster propagation delay (16 ns at 6V/50 pF), and a wider temperature range (-40°C to 125°C). It is not pin-for-pin compatible due to different supply voltage range, but serves the same logic role in 3.3V or 5V systems. The SN74LVU04APWT (74LVU series) is another 5V option with 7 ns delay, but lacks Schmitt-trigger inputs.
Yes — the 'LS' in 74LS stands for Low-Power Schottky, meaning it uses Schottky-clamped transistors for faster switching with lower power than standard TTL. The Schmitt-trigger inputs are a separate feature for noise immunity.