# SN74HC27N

**lingxingic** · Logic Gates · DIP-14

SN74HC27N from lingxingic, in a DIP-14. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | 1A | input | Data input of NOR gate 1; recommended input voltage is 0 V to VCC and the input clamping current limit is ±20 mA. |
| 2 | 1B | input | Data input of NOR gate 1; recommended input voltage is 0 V to VCC and the input clamping current limit is ±20 mA. |
| 3 | 2A | input | Data input of NOR gate 2; recommended input voltage is 0 V to VCC and the input clamping current limit is ±20 mA. |
| 4 | 2B | input | Data input of NOR gate 2; recommended input voltage is 0 V to VCC and the input clamping current limit is ±20 mA. |
| 5 | 2C | input | Data input of NOR gate 2; recommended input voltage is 0 V to VCC and the input clamping current limit is ±20 mA. |
| 6 | 2Y | output | Output of NOR gate 2, which is low when any input is high; absolute maximum output current is ±25 mA. |
| 7 | GND | power_in | Ground reference (0 V); absolute maximum ground current is -50 mA. |
| 8 | 3Y | output | Output of NOR gate 3, which is low when any input is high; absolute maximum output current is ±25 mA. |
| 9 | 3A | input | Data input of NOR gate 3; recommended input voltage is 0 V to VCC and the input clamping current limit is ±20 mA. |
| 10 | 3B | input | Data input of NOR gate 3; recommended input voltage is 0 V to VCC and the input clamping current limit is ±20 mA. |
| 11 | 3C | input | Data input of NOR gate 3; recommended input voltage is 0 V to VCC and the input clamping current limit is ±20 mA. |
| 12 | 1Y | output | Output of NOR gate 1, which is low when any input is high; absolute maximum output current is ±25 mA. |
| 13 | 1C | input | Data input of NOR gate 1; recommended input voltage is 0 V to VCC and the input clamping current limit is ±20 mA. |
| 14 | VCC | power_in | Supply voltage; recommended range is 2.0 V to 6.0 V (SN74HC27) or 4.5 V to 5.5 V (SN74HCT27), with absolute maximum +7 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | lingxingic |
| Package | DIP-14 |
| Category | Logic |
| Pins | 14 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| supply voltage | VCC | -0.5 |  | 7 | V |  | 7 |
| input clamping current | IIK | -20 |  | 20 | mA | VI < -0.5V or VI > VCC+0.5V | 7 |
| output clamping current | IOK | -20 |  | 20 | mA | VO < -0.5V or VO > VCC+0.5V | 7 |
| output current | IO | -25 |  | 25 | mA | -0.5V < VO < VCC+0.5V | 7 |
| supply current | ICC |  |  | 50 | mA |  | 7 |
| ground current | IGND | -50 |  |  | mA |  | 7 |
| total power dissipation | Ptot |  |  | 500 | mW |  | 7 |
| storage temperature | Tstg | -65 |  | 150 | ℃ |  | 7 |
| soldering temperature | TL |  |  | 245 | ℃ | 10s DIP | 7 |
| supply voltage | VCC | 2 | 5 | 6 | V |  | 7 |
| input voltage | VI | 0 |  |  | V |  | 7 |
| output voltage | VO | 0 |  |  | V |  | 7 |
| input transition rise and fall rate | Δt/ΔV |  |  | 625 | ns/V | VCC=2.0V | 7 |
| input transition rise and fall rate | Δt/ΔV |  | 1.67 | 139 | ns/V | VCC=4.5V | 7 |
| input transition rise and fall rate | Δt/ΔV |  |  | 83 | ns/V | VCC=6.0V | 7 |
| ambient temperature | Tamb | -40 |  | 125 | ℃ |  | 7 |
| HIGH-level input voltage | VIH | 1.5 | 1.2 |  | V | Tamb=25℃; VCC=2.0V | 8 |
| HIGH-level input voltage | VIH | 3.15 | 2.4 |  | V | Tamb=25℃; VCC=4.5V | 8 |
| HIGH-level input voltage | VIH | 4.2 | 3.2 |  | V | Tamb=25℃; VCC=6.0V | 8 |
| LOW-level input voltage | VIL |  | 0.8 | 0.5 | V | Tamb=25℃; VCC=2.0V | 8 |
| LOW-level input voltage | VIL |  | 2.1 | 1.35 | V | Tamb=25℃; VCC=4.5V | 8 |
| LOW-level input voltage | VIL |  | 2.8 | 1.8 | V | Tamb=25℃; VCC=6.0V | 8 |
| HIGH-level output voltage | VOH | 1.9 | 2 |  | V | Tamb=25℃; VI=VIH or VIL; IO=-20uA; VCC=2.0V | 8 |
| HIGH-level output voltage | VOH | 4.4 | 4.5 |  | V | Tamb=25℃; VI=VIH or VIL; IO=-20uA; VCC=4.5V | 8 |
| HIGH-level output voltage | VOH | 5.9 | 6 |  | V | Tamb=25℃; VI=VIH or VIL; IO=-20uA; VCC=6.0V | 8 |
| HIGH-level output voltage | VOH | 3.98 | 4.32 |  | V | Tamb=25℃; VI=VIH or VIL; IO=-4.0mA; VCC=4.5V | 8 |
| HIGH-level output voltage | VOH | 5.48 | 5.81 |  | V | Tamb=25℃; VI=VIH or VIL; IO=-5.2mA; VCC=6.0V | 8 |
| LOW-level output voltage | VOL |  | 0 | 0.1 | V | Tamb=25℃; VI=VIH or VIL; IO=20uA; VCC=2.0V | 8 |
| LOW-level output voltage | VOL |  | 0.15 | 0.26 | V | Tamb=25℃; VI=VIH or VIL; IO=4.0mA; VCC=4.5V | 8 |
| LOW-level output voltage | VOL |  | 0.16 | 0.26 | V | Tamb=25℃; VI=VIH or VIL; IO=5.2mA; VCC=6.0V | 8 |
| input leakage current | II | -1 |  | 1 | uA | Tamb=25℃; VI=VCC or GND; VCC=6.0V | 8 |
| supply current | ICC |  |  | 2 | uA | Tamb=25℃; VI=VCC or GND; IO=0A; VCC=6.0V | 8 |
| input capacitance | CI |  |  | 3.5 | pF | Tamb=25℃ | 8 |
| propagation delay nA, nB, nC to nY | tpd |  | 28 | 90 | ns | Tamb=25℃; see Figure 5; VCC=2.0V | 11 |
| propagation delay nA, nB, nC to nY | tpd |  | 10 | 18 | ns | Tamb=25℃; see Figure 5; VCC=4.5V | 11 |
| propagation delay nA, nB, nC to nY | tpd |  | 8 | 15 | ns | Tamb=25℃; see Figure 5; VCC=6.0V | 11 |
| transition time | tt |  | 19 | 75 | ns | Tamb=25℃; see Figure 5; VCC=2.0V | 11 |
| transition time | tt |  | 7 | 15 | ns | Tamb=25℃; see Figure 5; VCC=4.5V | 11 |
| transition time | tt |  | 6 | 13 | ns | Tamb=25℃; see Figure 5; VCC=6.0V | 11 |
| HIGH-level input voltage | VIH | 1.5 |  |  | V | Tamb=-40℃ to +125℃; VCC=2.0V | 10 |
| HIGH-level input voltage | VIH | 3.15 |  |  | V | Tamb=-40℃ to +125℃; VCC=4.5V | 10 |
| HIGH-level input voltage | VIH | 4.2 |  |  | V | Tamb=-40℃ to +125℃; VCC=6.0V | 10 |
| LOW-level input voltage | VIL |  |  | 0.5 | V | Tamb=-40℃ to +125℃; VCC=2.0V | 10 |
| LOW-level input voltage | VIL |  |  | 1.35 | V | Tamb=-40℃ to +125℃; VCC=4.5V | 10 |
| LOW-level input voltage | VIL |  |  | 1.8 | V | Tamb=-40℃ to +125℃; VCC=6.0V | 10 |
| HIGH-level output voltage | VOH | 1.9 |  |  | V | Tamb=-40℃ to +125℃; VI=VIH or VIL; IO=-20uA; VCC=2.0V | 10 |
| HIGH-level output voltage | VOH | 4.4 |  |  | V | Tamb=-40℃ to +125℃; VI=VIH or VIL; IO=-20uA; VCC=4.5V | 10 |
| HIGH-level output voltage | VOH | 5.9 |  |  | V | Tamb=-40℃ to +125℃; VI=VIH or VIL; IO=-20uA; VCC=6.0V | 10 |
| HIGH-level output voltage | VOH | 3.7 |  |  | V | Tamb=-40℃ to +125℃; VI=VIH or VIL; IO=-4.0mA; VCC=4.5V | 10 |
| HIGH-level output voltage | VOH | 5.2 |  |  | V | Tamb=-40℃ to +125℃; VI=VIH or VIL; IO=-5.2mA; VCC=6.0V | 10 |
| LOW-level output voltage | VOL |  |  | 0.1 | V | Tamb=-40℃ to +125℃; VI=VIH or VIL; IO=20uA; VCC=2.0V | 10 |
| LOW-level output voltage | VOL |  |  | 0.4 | V | Tamb=-40℃ to +125℃; VI=VIH or VIL; IO=4.0mA; VCC=4.5V | 10 |
| input leakage current | II | -1 |  | 1 | uA | Tamb=-40℃ to +125℃; VI=VCC or GND; VCC=6.0V | 10 |
| supply current | ICC |  |  | 40 | uA | Tamb=-40℃ to +125℃; VI=VCC or GND; IO=0A; VCC=6.0V | 10 |

## CAD (KiCad official)

- Symbol: `SN74HC27N`
- Footprint: `Package_DIP:DIP-14_W7.62mm`
- 3D model: DIP-14 (KiCad packages3D, STEP)
- 3D model files: `sn74hc27n-etched.step` / `sn74hc27n-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn74hc27n.step` / `sn74hc27n.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [lingxingic datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603383414703730688) (18 pp, sha256 `cf7ee2dbc2b2f9ab`, retrieved 2026-10-15, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/sn74hc27n-datasheet.pdf)