Texas Instruments 74F series NOR Gate, SN74F27NSR, triple 3-input, 4.5V to 5.5V supply, 5 ns propagation delay at 5V / 50 pF, 0°C to 70°C, 14-SOIC package.
| Parameter | Value |
|---|---|
| Series | 74F |
| Logic type | NOR Gate |
| Mounting | Surface Mount |
| Supply voltage | 4.5V ~ 5.5V |
| Current - output high, low | 1mA, 20mA |
| I/O channels | 3 |
| Operating temperature | 0°C ~ 70°C |
| Package | Tape & Reel (TR); Cut Tape (CT) |
| Case | 14-SOIC (0.209\", 5.30mm Width) |
| Number of circuits | 3 |
| Input logic level - low | 0.8V |
| Input logic level - high | 2V |
| Max propagation delay @ v, max CL | 5ns @ 5V, 50pF |
The SN74F27NSR is a triple 3-input NOR gate from the 74F fast TTL family. It operates from a 4.5 V to 5.5 V supply and is specified over the commercial temperature range of 0°C to 70°C.
The 5 ns maximum propagation delay at 5 V and 50 pF is the key timing spec. In a 5 V TTL backplane or memory-address decode path, that delay sets the window for data setup before the next clock edge.
No, the SN74F27NSR is listed as Active in production.
The SN74F27NSR is the surface-mount 14-SOIC variant; the SN74F27N is the through-hole DIP version. Electrical specifications are identical.
The 74F27PC is a through-hole DIP package; the SN74F27NSR is surface-mount SOIC. Functionally the same triple 3-input NOR gate, but the package is different — verify board footprint compatibility before substituting.