# TC74HC373APF

**TOSHIBA** · Latches · DIP-20

TC74HC373APF from TOSHIBA, in a DIP-20. 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 | OE | input | Active-low output enable input; when high, the eight outputs are in a high-impedance state. |
| 2 | Q0 | tri_state | 3-state latch output 0, high impedance when OE is high. |
| 3 | D0 | input | Data input 0 to the D-type latch. |
| 4 | D1 | input | Data input 1 to the D-type latch. |
| 5 | Q1 | tri_state | 3-state latch output 1, high impedance when OE is high. |
| 6 | Q2 | tri_state | 3-state latch output 2, high impedance when OE is high. |
| 7 | D2 | input | Data input 2 to the D-type latch. |
| 8 | D3 | input | Data input 3 to the D-type latch. |
| 9 | Q3 | tri_state | 3-state latch output 3, high impedance when OE is high. |
| 10 | GND | power_in | Ground pin; unused inputs must be tied to VCC or GND. |
| 11 | LE | input | Latch enable input; outputs follow D when high and are latched when LE goes low. |
| 12 | Q4 | tri_state | 3-state latch output 4, high impedance when OE is high. |
| 13 | D4 | input | Data input 4 to the D-type latch. |
| 14 | D5 | input | Data input 5 to the D-type latch. |
| 15 | Q5 | tri_state | 3-state latch output 5, high impedance when OE is high. |
| 16 | Q6 | tri_state | 3-state latch output 6, high impedance when OE is high. |
| 17 | D6 | input | Data input 6 to the D-type latch. |
| 18 | D7 | input | Data input 7 to the D-type latch. |
| 19 | Q7 | tri_state | 3-state latch output 7, high impedance when OE is high. |
| 20 | VCC | power_in | Supply voltage pin, operating range 2 to 6 V (absolute maximum -0.5 to 7 V). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TOSHIBA |
| Package | DIP-20 |
| Category | Logic ICs |
| Pins | 20 |

## 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 range | VCC | -0.5 |  | 7 | V |  | 3 |
| DC input voltage | VIN | -0.5 |  |  | V | max = VCC + 0.5 V as printed | 3 |
| DC output voltage | VOUT | -0.5 |  |  | V | max = VCC + 0.5 V as printed | 3 |
| Input diode current | IIK | -20 |  | 20 | mA |  | 3 |
| Output diode current | IOK | -20 |  | 20 | mA |  | 3 |
| DC output current | IOUT | -35 |  | 35 | mA |  | 3 |
| DC VCC/ground current | ICC | -75 |  | 75 | mA |  | 3 |
| Power dissipation | PD |  |  | 500 | mW | DIP package; Note 2: 500 mW for Ta = -40 to 65°C | 3 |
| Storage temperature | Tstg | -65 |  | 150 | °C |  | 3 |
| Supply voltage | VCC | 2 |  | 6 | V |  | 3 |
| Input voltage | VIN | 0 |  |  | V | max = VCC as printed | 3 |
| Output voltage | VOUT | 0 |  |  | V | max = VCC as printed | 3 |
| Operating temperature | Topr | -40 |  | 85 | °C |  | 3 |
| Input rise and fall time | tr, tf | 0 |  | 1000 | ns | VCC = 2.0 V | 3 |
| Input rise and fall time | tr, tf | 0 |  | 500 | ns | VCC = 4.5 V | 3 |
| Input rise and fall time | tr, tf | 0 |  | 400 | ns | VCC = 6.0 V | 3 |
| High-level input voltage | VIH | 1.5 |  |  | V | VCC = 2.0 V; Ta = -40 to 85°C | 4 |
| High-level input voltage | VIH | 3.15 |  |  | V | VCC = 4.5 V; Ta = -40 to 85°C | 4 |
| High-level input voltage | VIH | 4.2 |  |  | V | VCC = 6.0 V; Ta = -40 to 85°C | 4 |
| Low-level input voltage | VIL |  |  | 0.5 | V | VCC = 2.0 V; Ta = -40 to 85°C | 4 |
| Low-level input voltage | VIL |  |  | 1.35 | V | VCC = 4.5 V; Ta = -40 to 85°C | 4 |
| Low-level input voltage | VIL |  |  | 1.8 | V | VCC = 6.0 V; Ta = -40 to 85°C | 4 |
| High-level output voltage | VOH | 1.9 | 2 |  | V | IOH = -20 µA; VIN = VIH or VIL; VCC = 2.0 V; min at Ta = -40 to 85°C, typ at Ta = 25°C | 4 |
| High-level output voltage | VOH | 4.4 | 4.5 |  | V | IOH = -20 µA; VIN = VIH or VIL; VCC = 4.5 V; min at Ta = -40 to 85°C, typ at Ta = 25°C | 4 |
| High-level output voltage | VOH | 5.9 | 6 |  | V | IOH = -20 µA; VIN = VIH or VIL; VCC = 6.0 V; min at Ta = -40 to 85°C, typ at Ta = 25°C | 4 |
| High-level output voltage | VOH | 4.13 | 4.31 |  | V | IOH = -6 mA; VIN = VIH or VIL; VCC = 4.5 V; min at Ta = -40 to 85°C, typ at Ta = 25°C | 4 |
| High-level output voltage | VOH | 5.63 | 5.8 |  | V | IOH = -7.8 mA; VIN = VIH or VIL; VCC = 6.0 V; min at Ta = -40 to 85°C, typ at Ta = 25°C | 4 |
| Low-level output voltage | VOL |  | 0 | 0.1 | V | IOL = 20 µA; VIN = VIH or VIL; VCC = 2.0 V; max at Ta = -40 to 85°C, typ at Ta = 25°C | 4 |
| Low-level output voltage | VOL |  | 0.17 | 0.33 | V | IOL = 6 mA; VIN = VIH or VIL; VCC = 4.5 V; max at Ta = -40 to 85°C, typ at Ta = 25°C | 4 |
| Low-level output voltage | VOL |  | 0.18 | 0.33 | V | IOL = 7.8 mA; VIN = VIH or VIL; VCC = 6.0 V; max at Ta = -40 to 85°C, typ at Ta = 25°C | 4 |
| 3-state output off-state current | IOZ | -5 |  | 5 | µA | VCC = 6.0 V; VIN = VIH or VIL; VOUT = VCC or GND; Ta = -40 to 85°C | 4 |
| Input leakage current | IIN | -1 |  | 1 | µA | VCC = 6.0 V; VIN = VCC or GND; Ta = -40 to 85°C | 4 |
| Quiescent supply current | ICC |  |  | 4 | µA | VCC = 6.0 V; VIN = VCC or GND; Ta = 25°C | 4 |
| Quiescent supply current | ICC |  |  | 40 | µA | VCC = 6.0 V; VIN = VCC or GND; Ta = -40 to 85°C | 4 |
| Minimum pulse width (LE) | tW(H) | 95 |  |  | ns | input tr = tf = 6 ns; VCC = 2.0 V; Ta = -40 to 85°C | 4 |
| Minimum pulse width (LE) | tW(H) | 19 |  |  | ns | input tr = tf = 6 ns; VCC = 4.5 V; Ta = -40 to 85°C | 4 |
| Minimum pulse width (LE) | tW(H) | 16 |  |  | ns | input tr = tf = 6 ns; VCC = 6.0 V; Ta = -40 to 85°C | 4 |
| Minimum set-up time (Dn) | ts | 65 |  |  | ns | input tr = tf = 6 ns; VCC = 2.0 V; Ta = -40 to 85°C | 4 |
| Minimum set-up time (Dn) | ts | 13 |  |  | ns | input tr = tf = 6 ns; VCC = 4.5 V; Ta = -40 to 85°C | 4 |
| Minimum set-up time (Dn) | ts | 11 |  |  | ns | input tr = tf = 6 ns; VCC = 6.0 V; Ta = -40 to 85°C | 4 |
| Minimum hold time (Dn) | th | 5 |  |  | ns | input tr = tf = 6 ns; VCC = 2.0 V; Ta = -40 to 85°C | 4 |
| Output transition time | tTLH, tTHL |  | 20 | 75 | ns | CL = 50 pF; input tr = tf = 6 ns; VCC = 2.0 V; max at Ta = -40 to 85°C, typ at Ta = 25°C | 5 |
| Output transition time | tTLH, tTHL |  | 6 | 15 | ns | CL = 50 pF; input tr = tf = 6 ns; VCC = 4.5 V; max at Ta = -40 to 85°C, typ at Ta = 25°C | 5 |
| Output transition time | tTLH, tTHL |  | 5 | 13 | ns | CL = 50 pF; input tr = tf = 6 ns; VCC = 6.0 V; max at Ta = -40 to 85°C, typ at Ta = 25°C | 5 |
| Propagation delay time (LE-Q) | tpLH, tpHL |  | 57 | 220 | ns | CL = 150 pF; input tr = tf = 6 ns; VCC = 2.0 V; max at Ta = -40 to 85°C, typ at Ta = 25°C | 5 |
| Propagation delay time (LE-Q) | tpLH, tpHL |  | 19 | 44 | ns | CL = 150 pF; input tr = tf = 6 ns; VCC = 4.5 V; max at Ta = -40 to 85°C, typ at Ta = 25°C | 5 |
| Propagation delay time (LE-Q) | tpLH, tpHL |  | 16 | 37 | ns | CL = 150 pF; input tr = tf = 6 ns; VCC = 6.0 V; max at Ta = -40 to 85°C, typ at Ta = 25°C | 5 |
| Propagation delay time (D-Q) | tpLH, tpHL |  | 57 | 220 | ns | CL = 150 pF; input tr = tf = 6 ns; VCC = 2.0 V; max at Ta = -40 to 85°C, typ at Ta = 25°C | 5 |
| Propagation delay time (D-Q) | tpLH, tpHL |  | 19 | 44 | ns | CL = 150 pF; input tr = tf = 6 ns; VCC = 4.5 V; max at Ta = -40 to 85°C, typ at Ta = 25°C | 5 |
| Propagation delay time (D-Q) | tpLH, tpHL |  | 16 | 37 | ns | CL = 150 pF; input tr = tf = 6 ns; VCC = 6.0 V; max at Ta = -40 to 85°C, typ at Ta = 25°C | 5 |
| Output enable time | tpZL, tpZH |  | 54 | 220 | ns | CL = 150 pF; RL = 1 kΩ; input tr = tf = 6 ns; VCC = 2.0 V; max at Ta = -40 to 85°C, typ at Ta = 25°C | 5 |
| Output enable time | tpZL, tpZH |  | 18 | 44 | ns | CL = 150 pF; RL = 1 kΩ; input tr = tf = 6 ns; VCC = 4.5 V; max at Ta = -40 to 85°C, typ at Ta = 25°C | 5 |
| Output enable time | tpZL, tpZH |  | 15 | 37 | ns | CL = 150 pF; RL = 1 kΩ; input tr = tf = 6 ns; VCC = 6.0 V; max at Ta = -40 to 85°C, typ at Ta = 25°C | 5 |
| Output disable time | tpLZ, tpHZ |  | 30 | 155 | ns | CL = 50 pF; RL = 1 kΩ; input tr = tf = 6 ns; VCC = 2.0 V; max at Ta = -40 to 85°C, typ at Ta = 25°C | 5 |
| Output disable time | tpLZ, tpHZ |  | 14 | 31 | ns | CL = 50 pF; RL = 1 kΩ; input tr = tf = 6 ns; VCC = 4.5 V; max at Ta = -40 to 85°C, typ at Ta = 25°C | 5 |
| Output disable time | tpLZ, tpHZ |  | 13 | 26 | ns | CL = 50 pF; RL = 1 kΩ; input tr = tf = 6 ns; VCC = 6.0 V; max at Ta = -40 to 85°C, typ at Ta = 25°C | 5 |

## CAD (KiCad official)

- Symbol: `TC74HC373APF`
- Footprint: `Package_DIP:DIP-20_W7.62mm`
- 3D model: DIP-20 (KiCad packages3D, STEP)
- 3D model files: `tc74hc373apf-etched.step` / `tc74hc373apf-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tc74hc373apf.step` / `tc74hc373apf.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TOSHIBA datasheet](docs/tc74hc373apf-datasheet.pdf) (8 pp, sha256 `6e03efa865693aad`, retrieved 2026-10-29, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/tc74hc373apf-datasheet.pdf)