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74VHCT245AFT

Public Made by Adom

by 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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74VHCT245AFT

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.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 74vhct245aft.step / 74vhct245aft.glb are 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, 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