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74VHCT245AFT
Public Made by Adomby adom
TOSHIBA Buffers, Drivers, Receivers, Transceivers, TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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Symbol & Footprint
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README
markdown74VHCT245AFT
TOSHIBA · Buffers, Drivers, Receivers, Transceivers · TSSOP-20
74VHCT245AFT from TOSHIBA, in a TSSOP-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 | DIR | input | Direction control input: its level sets the direction of transmission (A to B or B to A); input range 0 to 5.5 V, unused inputs must be tied to VCC or GND. |
| 2 | A1 | bidirectional | A bus I/O 1, 3-state, 0 to 5.5 V; must not be driven externally when in output mode and must be fixed by pull-up or pull-down when floating. |
| 3 | A2 | bidirectional | A bus I/O 2, 3-state, 0 to 5.5 V; must not be driven externally when in output mode and must be fixed by pull-up or pull-down when floating. |
| 4 | A3 | bidirectional | A bus I/O 3, 3-state, 0 to 5.5 V; must not be driven externally when in output mode and must be fixed by pull-up or pull-down when floating. |
| 5 | A4 | bidirectional | A bus I/O 4, 3-state, 0 to 5.5 V; must not be driven externally when in output mode and must be fixed by pull-up or pull-down when floating. |
| 6 | A5 | bidirectional | A bus I/O 5, 3-state, 0 to 5.5 V; must not be driven externally when in output mode and must be fixed by pull-up or pull-down when floating. |
| 7 | A6 | bidirectional | A bus I/O 6, 3-state, 0 to 5.5 V; must not be driven externally when in output mode and must be fixed by pull-up or pull-down when floating. |
| 8 | A7 | bidirectional | A bus I/O 7, 3-state, 0 to 5.5 V; must not be driven externally when in output mode and must be fixed by pull-up or pull-down when floating. |
| 9 | A8 | bidirectional | A bus I/O 8, 3-state, 0 to 5.5 V; must not be driven externally when in output mode and must be fixed by pull-up or pull-down when floating. |
| 10 | GND | power_in | Ground (0 V) reference pin. |
| 11 | B8 | bidirectional | B bus I/O 8, 3-state, 0 to 5.5 V; must not be driven externally when in output mode and must be fixed by pull-up or pull-down when floating. |
| 12 | B7 | bidirectional | B bus I/O 7, 3-state, 0 to 5.5 V; must not be driven externally when in output mode and must be fixed by pull-up or pull-down when floating. |
| 13 | B6 | bidirectional | B bus I/O 6, 3-state, 0 to 5.5 V; must not be driven externally when in output mode and must be fixed by pull-up or pull-down when floating. |
| 14 | B5 | bidirectional | B bus I/O 5, 3-state, 0 to 5.5 V; must not be driven externally when in output mode and must be fixed by pull-up or pull-down when floating. |
| 15 | B4 | bidirectional | B bus I/O 4, 3-state, 0 to 5.5 V; must not be driven externally when in output mode and must be fixed by pull-up or pull-down when floating. |
| 16 | B3 | bidirectional | B bus I/O 3, 3-state, 0 to 5.5 V; must not be driven externally when in output mode and must be fixed by pull-up or pull-down when floating. |
| 17 | B2 | bidirectional | B bus I/O 2, 3-state, 0 to 5.5 V; must not be driven externally when in output mode and must be fixed by pull-up or pull-down when floating. |
| 18 | B1 | bidirectional | B bus I/O 1, 3-state, 0 to 5.5 V; must not be driven externally when in output mode and must be fixed by pull-up or pull-down when floating. |
| 19 | G | input | Active-low output enable input (G-bar): when high the device is disabled and the buses are isolated; input range 0 to 5.5 V. |
| 20 | VCC | power_in | Positive supply voltage, operating range 4.5 to 5.5 V (absolute maximum -0.5 to 7.0 V). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | TOSHIBA |
| Package | TSSOP-20 |
| Category | Logic |
| 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 |
|---|---|---|---|---|---|---|---|
| High-level input voltage | VIH | 2 | V | 4 | |||
| Low-level input voltage | VIL | 0.8 | V | 4 | |||
| High-level output voltage | VOH | 4.4 | 4.5 | V | VIN = VIH or VIL, IOH = -50 µA | 4 | |
| High-level output voltage | VOH | 3.94 | V | VIN = VIH or VIL, IOH = -8 mA | 4 | ||
| Low-level output voltage | VOL | 0 | 0.1 | V | VIN = VIH or VIL, IOL = 50 µA | 4 | |
| Low-level output voltage | VOL | 0.36 | V | VIN = VIH or VIL, IOL = 8 mA | 4 | ||
| 3-state output OFF-state leakage current | IOZ | -0.25 | 0.25 | µA | VIN = VIH or VIL, VOUT = VCC or GND | 4 | |
| Input leakage current | IIN | -0.1 | 0.1 | µA | VIN = 5.5 V or GND | 4 | |
| Quiescent supply current | ICC | 4 | µA | VIN = VCC or GND | 4 | ||
| Quiescent supply current (per input) | ICCT | 1.35 | mA | Per input: VIN = 3.4 V, other input: VCC or GND | 4 | ||
| Output leakage current (Power-OFF) | IOPD | 0.5 | µA | VOUT = 5.5 V | 4 | ||
| High-level output voltage | VOH | 4.4 | V | Ta = -40 to 85 °C; VIN = VIH or VIL, IOH = -50 µA | 4 | ||
| High-level output voltage | VOH | 3.8 | V | Ta = -40 to 85 °C; VIN = VIH or VIL, IOH = -8 mA | 4 | ||
| Low-level output voltage | VOL | 0.1 | V | Ta = -40 to 85 °C; VIN = VIH or VIL, IOL = 50 µA | 4 | ||
| Low-level output voltage | VOL | 0.44 | V | Ta = -40 to 85 °C; VIN = VIH or VIL, IOL = 8 mA | 4 | ||
| 3-state output OFF-state leakage current | IOZ | -2.5 | 2.5 | µA | Ta = -40 to 85 °C; VIN = VIH or VIL, VOUT = VCC or GND | 4 | |
| Input leakage current | IIN | -1 | 1 | µA | Ta = -40 to 85 °C; VIN = 5.5 V or GND | 4 | |
| Quiescent supply current | ICC | 40 | µA | Ta = -40 to 85 °C; VIN = VCC or GND | 4 | ||
| Quiescent supply current (per input) | ICCT | 1.5 | mA | Ta = -40 to 85 °C; Per input: VIN = 3.4 V, other input: VCC or GND | 4 | ||
| Output leakage current (Power-OFF) | IOPD | 5 | µA | Ta = -40 to 85 °C; VOUT = 5.5 V | 4 | ||
| High-level input voltage | VIH | 2 | V | Ta = -40 to 125 °C | 5 | ||
| Low-level input voltage | VIL | 0.8 | V | Ta = -40 to 125 °C | 5 | ||
| High-level output voltage | VOH | 4.4 | V | Ta = -40 to 125 °C; VIN = VIH or VIL, IOH = -50 µA | 5 | ||
| High-level output voltage | VOH | 3.7 | V | Ta = -40 to 125 °C; VIN = VIH or VIL, IOH = -8 mA | 5 | ||
| Low-level output voltage | VOL | 0.1 | V | Ta = -40 to 125 °C; VIN = VIH or VIL, IOL = 50 µA | 5 | ||
| Low-level output voltage | VOL | 0.55 | V | Ta = -40 to 125 °C; VIN = VIH or VIL, IOL = 8 mA | 5 | ||
| 3-state output OFF-state leakage current | IOZ | -10 | 10 | µA | Ta = -40 to 125 °C; VIN = VIH or VIL, VOUT = VCC or GND | 5 | |
| Input leakage current | IIN | -2 | 2 | µA | Ta = -40 to 125 °C; VIN = 5.5 V or GND | 5 | |
| Quiescent supply current | ICC | 80 | µA | Ta = -40 to 125 °C; VIN = VCC or GND | 5 | ||
| Quiescent supply current (per input) | ICCT | 1.5 | mA | Ta = -40 to 125 °C; Per input: VIN = 3.4 V, other input: VCC or GND | 5 | ||
| Output leakage current (Power-OFF) | IOPD | -20 | 20 | µA | Ta = -40 to 125 °C; VOUT = 5.5 V | 5 | |
| Propagation delay time | tPLH,tPHL | 4.9 | 7.7 | ns | Ta = 25 °C, tr = tf = 3 ns; VCC = 5.0 ± 0.5 V, CL = 15 pF, RL = 1 kΩ | 6 | |
| Propagation delay time | tPLH,tPHL | 5.4 | 8.7 | ns | Ta = 25 °C, tr = tf = 3 ns; VCC = 5.0 ± 0.5 V, CL = 50 pF, RL = 1 kΩ | 6 | |
| 3-state output enable time | tPZL,tPZH | 9.4 | 13.8 | ns | Ta = 25 °C, tr = tf = 3 ns; VCC = 5.0 ± 0.5 V, CL = 15 pF, RL = 1 kΩ | 6 | |
| 3-state output enable time | tPZL,tPZH | 9.9 | 14.8 | ns | Ta = 25 °C, tr = tf = 3 ns; VCC = 5.0 ± 0.5 V, CL = 50 pF, RL = 1 kΩ | 6 | |
| 3-state output disable time | tPLZ,tPHZ | 10.1 | 15.4 | ns | Ta = 25 °C, tr = tf = 3 ns; VCC = 5.0 ± 0.5 V, CL = 15 pF, RL = 1 kΩ | 6 | |
| Propagation delay time | tPLH,tPHL | 1 | 10 | ns | Ta = -40 to 125 °C, tr = tf = 3 ns; VCC = 5.0 ± 0.5 V, CL = 15 pF, RL = 1 kΩ | 6 | |
| Propagation delay time | tPLH,tPHL | 1 | 11 | ns | Ta = -40 to 125 °C, tr = tf = 3 ns; VCC = 5.0 ± 0.5 V, CL = 50 pF, RL = 1 kΩ | 6 | |
| 3-state output enable time | tPZL,tPZH | 1 | 17 | ns | Ta = -40 to 125 °C, tr = tf = 3 ns; VCC = 5.0 ± 0.5 V, CL = 15 pF, RL = 1 kΩ | 6 | |
| 3-state output enable time | tPZL,tPZH | 1 | 17.5 | ns | Ta = -40 to 125 °C, tr = tf = 3 ns; VCC = 5.0 ± 0.5 V, CL = 50 pF, RL = 1 kΩ | 6 | |
| 3-state output disable time | tPLZ,tPHZ | 1 | 18 | ns | Ta = -40 to 125 °C, tr = tf = 3 ns; VCC = 5.0 ± 0.5 V, CL = 15 pF, RL = 1 kΩ | 6 | |
| Supply voltage | VCC | -0.5 | 7 | V | 3 | ||
| Input voltage (DIR, G) | VIN | -0.5 | 7 | V | 3 | ||
| Bus I/O voltage | VI/O | -0.5 | 7 | V | Output in off-state (Note 1) | 3 | |
| Bus I/O voltage, high or low state (printed as -0.5 to VCC + 0.5 V) | -0.5 | V | High or low state (Note 2) | 3 | |||
| Input diode current | IIK | -20 | mA | 3 | |||
| Output diode current | IOK | -20 | 20 | mA | VOUT < GND, VOUT > VCC (Note 3) | 3 | |
| Output current | IOUT | -25 | 25 | mA | High or low state (Note 2) | 3 | |
| VCC/ground current | ICC | -75 | 75 | mA | 3 | ||
| Power dissipation | PD | 180 | mW | Ta = -40 to 85 °C; derate -3.25 mW/°C from 85 to 125 °C, to 50 mW (Note 4) | 3 | ||
| Storage temperature | Tstg | -65 | 150 | °C | 3 | ||
| Supply voltage | VCC | 4.5 | 5.5 | V | 4 | ||
| Input voltage (DIR, G) | VIN | 0 | 5.5 | V | 4 | ||
| Bus I/O voltage | VI/O | 0 | 5.5 | V | Output in off-state (Note 1) | 4 | |
| Bus I/O voltage, high or low state (printed as 0 to VCC) | 0 | V | High or low state (Note 2) | 4 | |||
| Operating temperature | Topr | -40 | 125 | °C | 4 | ||
| Input rise and fall times | dt/dv | 0 | 20 | ns/V | 4 |
CAD (KiCad official)
- Symbol:
74VHCT245AFT - Footprint:
Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm - 3D model: TSSOP-20 (KiCad packages3D, STEP)
- 3D model files:
74vhct245aft-etched.step/74vhct245aft-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);74vhct245aft.step/74vhct245aft.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: TOSHIBA datasheet (8 pp, sha256
b8cebfb188a15a94, retrieved 2026-10-19, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-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).