# SN74HC174N

**lingxingic** · Flip Flops · DIP-16

SN74HC174N from lingxingic, in a DIP-16. 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 | MR | input | Asynchronous master reset input, active LOW, which forces all Qn outputs LOW independent of the clock. |
| 2 | Q0 | output | Data output of flip-flop 0. |
| 3 | D0 | input | Data input of flip-flop 0, sampled on the LOW-to-HIGH clock transition. |
| 4 | D1 | input | Data input of flip-flop 1, sampled on the LOW-to-HIGH clock transition. |
| 5 | Q1 | output | Data output of flip-flop 1. |
| 6 | D2 | input | Data input of flip-flop 2, sampled on the LOW-to-HIGH clock transition. |
| 7 | Q2 | output | Data output of flip-flop 2. |
| 8 | GND | power_in | Ground (0 V) reference for all voltages. |
| 9 | CP | input | Clock input, triggered on the LOW-to-HIGH edge. |
| 10 | Q3 | output | Data output of flip-flop 3. |
| 11 | D3 | input | Data input of flip-flop 3, sampled on the LOW-to-HIGH clock transition. |
| 12 | Q4 | output | Data output of flip-flop 4. |
| 13 | D4 | input | Data input of flip-flop 4, sampled on the LOW-to-HIGH clock transition. |
| 14 | D5 | input | Data input of flip-flop 5, sampled on the LOW-to-HIGH clock transition. |
| 15 | Q5 | output | Data output of flip-flop 5. |
| 16 | VCC | power_in | Supply voltage; the SN74HC174 is specified for 2.0 V to 6.0 V and the SN74HCT174 for 4.5 V to 5.5 V, with absolute maximum VCC of +7 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | lingxingic |
| Package | DIP-16 |
| Category | Logic |
| Pins | 16 |

## 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 |
| Supply current | ICC |  |  | 50 | mA |  | 7 |
| Ground current | IGND | -50 |  |  | mA |  | 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 |
| Storage temperature | Tstg | -65 |  | 150 | ℃ |  | 7 |
| Soldering temperature (DIP) | TL |  |  | 245 | ℃ | 10s, DIP package | 7 |
| Supply voltage (HC) | VCC | 2 | 5 | 6 | V |  | 7 |
| Ambient temperature | Tamb | -40 |  | 125 | ℃ |  | 7 |
| HIGH-level input voltage | VIH | 1.5 | 1.2 |  | V | Tamb=-40℃ to +85℃; VCC=2.0V | 7 |
| HIGH-level input voltage | VIH | 3.15 | 2.4 |  | V | Tamb=-40℃ to +85℃; VCC=4.5V | 7 |
| HIGH-level input voltage | VIH | 4.2 | 3.2 |  | V | Tamb=-40℃ to +85℃; VCC=6.0V | 7 |
| LOW-level input voltage | VIL |  | 0.8 | 0.5 | V | Tamb=-40℃ to +85℃; VCC=2.0V | 7 |
| LOW-level input voltage | VIL |  | 2.1 | 1.35 | V | Tamb=-40℃ to +85℃; VCC=4.5V | 7 |
| LOW-level input voltage | VIL |  | 2.8 | 1.8 | V | Tamb=-40℃ to +85℃; VCC=6.0V | 7 |
| HIGH-level output voltage | VOH | 1.9 | 2 |  | V | Tamb=-40℃ to +85℃; VCC=2.0V; IO=-20uA | 7 |
| HIGH-level output voltage | VOH | 4.4 | 4.5 |  | V | Tamb=-40℃ to +85℃; VCC=4.5V; IO=-20uA | 7 |
| HIGH-level output voltage | VOH | 5.9 | 6 |  | V | Tamb=-40℃ to +85℃; VCC=6.0V; IO=-20uA | 7 |
| HIGH-level output voltage | VOH | 3.84 | 4.32 |  | V | Tamb=-40℃ to +85℃; VCC=4.5V; IO=-4.0mA | 7 |
| HIGH-level output voltage | VOH | 5.34 | 5.81 |  | V | Tamb=-40℃ to +85℃; VCC=6.0V; IO=-5.2mA | 7 |
| LOW-level output voltage | VOL |  | 0 | 0.1 | V | Tamb=-40℃ to +85℃; VCC=2.0V; IO=20uA | 7 |
| LOW-level output voltage | VOL |  | 0 | 0.1 | V | Tamb=-40℃ to +85℃; VCC=4.5V; IO=20uA | 8 |
| LOW-level output voltage | VOL |  | 0.15 | 0.33 | V | Tamb=-40℃ to +85℃; VCC=4.5V; IO=4.0mA | 8 |
| LOW-level output voltage | VOL |  | 0.16 | 0.33 | V | Tamb=-40℃ to +85℃; VCC=6.0V; IO=5.2mA | 8 |
| Input leakage current | II | -1 |  | 1 | uA | Tamb=-40℃ to +85℃; VCC=6.0V; VI=VCC or GND | 8 |
| Supply current | ICC |  |  | 80 | uA | Tamb=-40℃ to +85℃; VCC=6.0V; VI=VCC or GND; IO=0A | 8 |
| HIGH-level input voltage | VIH | 1.5 |  |  | V | Tamb=-40℃ to +125℃; VCC=2.0V | 8 |
| HIGH-level input voltage | VIH | 3.15 |  |  | V | Tamb=-40℃ to +125℃; VCC=4.5V | 8 |
| HIGH-level input voltage | VIH | 4.2 |  |  | V | Tamb=-40℃ to +125℃; VCC=6.0V | 8 |
| LOW-level input voltage | VIL |  |  | 0.5 | V | Tamb=-40℃ to +125℃; VCC=2.0V | 8 |
| LOW-level input voltage | VIL |  |  | 1.35 | V | Tamb=-40℃ to +125℃; VCC=4.5V | 8 |
| LOW-level input voltage | VIL |  |  | 1.8 | V | Tamb=-40℃ to +125℃; VCC=6.0V | 8 |
| HIGH-level output voltage | VOH | 1.9 |  |  | V | Tamb=-40℃ to +125℃; VCC=2.0V; IO=-20uA | 8 |
| HIGH-level output voltage | VOH | 4.4 |  |  | V | Tamb=-40℃ to +125℃; VCC=4.5V; IO=-20uA | 8 |
| HIGH-level output voltage | VOH | 5.9 |  |  | V | Tamb=-40℃ to +125℃; VCC=6.0V; IO=-20uA | 8 |
| HIGH-level output voltage | VOH | 3.7 |  |  | V | Tamb=-40℃ to +125℃; VCC=4.5V; IO=-4.0mA | 8 |
| HIGH-level output voltage | VOH | 5.2 |  |  | V | Tamb=-40℃ to +125℃; VCC=6.0V; IO=-5.2mA | 8 |
| LOW-level output voltage | VOL |  |  | 0.1 | V | Tamb=-40℃ to +125℃; VCC=2.0V; IO=20uA | 8 |
| LOW-level output voltage | VOL |  |  | 0.4 | V | Tamb=-40℃ to +125℃; VCC=4.5V; IO=4.0mA | 8 |
| Supply current | ICC |  |  | 160 | uA | Tamb=-40℃ to +125℃; VCC=6.0V; VI=VCC or GND; IO=0A | 8 |
| CP to Qn propagation delay | tPLH, tPHL |  | 20 | 41 | ns | Tamb=-40℃ to +85℃; VCC=4.5V; CL=50pF; see Figure 4 | 9 |
| CP to Qn propagation delay | tPLH, tPHL |  | 55 | 205 | ns | Tamb=-40℃ to +85℃; VCC=2.0V; CL=50pF; see Figure 4 | 9 |
| MR to Qn HIGH to LOW propagation delay | tPHL |  | 16 | 38 | ns | Tamb=-40℃ to +85℃; VCC=4.5V; CL=50pF; see Figure 5 | 9 |
| Transition time | tTHL, tTLH |  | 7 | 19 | ns | Tamb=-40℃ to +85℃; VCC=4.5V; CL=50pF; see Figure 4 | 9 |
| CP input HIGH or LOW pulse width | tW | 20 | 6 |  | ns | Tamb=-40℃ to +85℃; VCC=4.5V; CL=50pF; see Figure 4 | 9 |
| MR input LOW pulse width | tW | 20 | 4 |  | ns | Tamb=-40℃ to +85℃; VCC=4.5V; CL=50pF; see Figure 5 | 9 |
| MR to CP recovery time | trec | 5 | -4 |  | ns | Tamb=-40℃ to +85℃; VCC=4.5V; CL=50pF; see Figure 5 | 9 |
| Dn to CP set-up time | tsu | 15 | 2 |  | ns | Tamb=-40℃ to +85℃; VCC=4.5V; CL=50pF; see Figure 4 | 9 |
| Dn to CP hold time | th | 3 | -2 |  | ns | Tamb=-40℃ to +85℃; VCC=4.5V; CL=50pF; see Figure 4 | 9 |
| Maximum frequency | fmax | 24 |  |  | MHZ | Tamb=-40℃ to +85℃; VCC=4.5V; CL=50pF | 10 |
| CP to Qn propagation delay | tPLH, tPHL |  |  | 50 | ns | Tamb=-40℃ to +125℃; VCC=4.5V; CL=50pF; see Figure 4 | 10 |
| MR to Qn HIGH to LOW propagation delay | tPHL |  |  | 45 | ns | Tamb=-40℃ to +125℃; VCC=4.5V; CL=50pF; see Figure 5 | 10 |
| Transition time | tTHL, tTLH |  |  | 22 | ns | Tamb=-40℃ to +125℃; VCC=4.5V; CL=50pF; see Figure 4 | 10 |
| CP input HIGH or LOW pulse width | tW | 24 |  |  | ns | Tamb=-40℃ to +125℃; VCC=4.5V; CL=50pF; see Figure 4 | 10 |

## CAD (KiCad official)

- Symbol: `SN74HC174N`
- Footprint: `Package_DIP:DIP-16_W7.62mm`
- 3D model: DIP-16 (KiCad packages3D, STEP)
- 3D model files: `sn74hc174n-etched.step` / `sn74hc174n-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn74hc174n.step` / `sn74hc174n.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/8603323107365580800) (17 pp, sha256 `61678a8b1a0bdf94`, retrieved 2026-10-16, 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/sn74hc174n-datasheet.pdf)