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74VHC21FT

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TOSHIBA Logic Gates, TSSOP-14-175mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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74VHC21FT

TOSHIBA · Logic Gates · TSSOP-14-175mil

74VHC21FT from TOSHIBA, in a TSSOP-14-175mil. 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 Gate 1 input A; inputs accept 0 to 5.5 V regardless of supply voltage, and unused inputs must be tied to VCC or GND.
2 1B input Gate 1 input B; accepts 0 to 5.5 V and must be tied to VCC or GND if unused.
3 NC unconnected No internal connection.
4 1C input Gate 1 input C; accepts 0 to 5.5 V and must be tied to VCC or GND if unused.
5 1D input Gate 1 input D; accepts 0 to 5.5 V and must be tied to VCC or GND if unused.
6 1Y output Gate 1 AND output (high only when 1A, 1B, 1C and 1D are all high), with buffered output stage.
7 GND power_in Ground (0 V) reference.
8 2Y output Gate 2 AND output (high only when 2A, 2B, 2C and 2D are all high), with buffered output stage.
9 2A input Gate 2 input A; accepts 0 to 5.5 V and must be tied to VCC or GND if unused.
10 2B input Gate 2 input B; accepts 0 to 5.5 V and must be tied to VCC or GND if unused.
11 NC unconnected No internal connection.
12 2C input Gate 2 input C; accepts 0 to 5.5 V and must be tied to VCC or GND if unused.
13 2D input Gate 2 input D; accepts 0 to 5.5 V and must be tied to VCC or GND if unused.
14 VCC power_in Positive supply, operating range 2.0 V to 5.5 V (absolute maximum -0.5 to 7.0 V).

Key specifications

Parameter Value
Manufacturer TOSHIBA
Package TSSOP-14-175mil
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 2 5.5 V 3
Input voltage VIN 0 5.5 V 3
Output voltage VOUT 0 V 3
Operating temperature Topr -40 125 °C 3
Supply voltage VCC -0.5 7 V 3
Input voltage VIN -0.5 7 V 3
Output voltage VOUT -0.5 V 3
Input diode current IIK -20 mA 3
Output diode current IOK -20 20 mA 3
Output current IOUT -25 25 mA 3
VCC/ground current ICC -50 50 mA 3
Power dissipation PD 180 mW Ta = -40 to 85 °C (Note 1) 3
Storage temperature Tstg -65 150 °C 3
High-level input voltage VIH 1.5 V VCC = 2.0 V; Ta = 25 °C 4
Low-level input voltage VIL 0.5 V VCC = 2.0 V; Ta = 25 °C 4
High-level output voltage VOH 1.9 V IOH = -50 µA; VCC = 2.0 V; Ta = 25 °C 4
High-level output voltage VOH 2.9 V IOH = -50 µA; VCC = 3.0 V; Ta = 25 °C 4
High-level output voltage VOH 4.4 V IOH = -50 µA; VCC = 4.5 V; Ta = 25 °C 4
High-level output voltage VOH 2.58 V IOH = -4 mA; VCC = 3.0 V; Ta = 25 °C 4
High-level output voltage VOH 3.94 V IOH = -8 mA; VCC = 4.5 V; Ta = 25 °C 4
Low-level output voltage VOL 0.1 V IOL = 50 µA; VCC = 2.0 V; Ta = 25 °C 4
Low-level output voltage VOL 0.36 V IOL = 4 mA; VCC = 3.0 V; Ta = 25 °C 4
Input leakage current IIN -0.1 0.1 µA VIN = 5.5 V or GND; VCC = 0 to 5.5 V; Ta = 25 °C 4
Quiescent supply current ICC 2 µA VIN = VCC or GND; VCC = 5.5 V; Ta = 25 °C 4
High-level output voltage VOH 2.48 V IOH = -4 mA; VCC = 3.0 V; Ta = -40 to 85 °C 4
High-level output voltage VOH 3.8 V IOH = -8 mA; VCC = 4.5 V; Ta = -40 to 85 °C 4
Low-level output voltage VOL 0.44 V IOL = 4 mA; VCC = 3.0 V; Ta = -40 to 85 °C 4
Input leakage current IIN -1 1 µA VIN = 5.5 V or GND; VCC = 0 to 5.5 V; Ta = -40 to 85 °C 4
Quiescent supply current ICC 20 µA VIN = VCC or GND; VCC = 5.5 V; Ta = -40 to 85 °C 4
High-level input voltage VIH 1.5 V VCC = 2.0 V; Ta = -40 to 125 °C 5
Low-level input voltage VIL 0.5 V VCC = 2.0 V; Ta = -40 to 125 °C 5
High-level output voltage VOH 1.9 V IOH = -50 µA; VCC = 2.0 V; Ta = -40 to 125 °C 5
High-level output voltage VOH 2.9 V IOH = -50 µA; VCC = 3.0 V; Ta = -40 to 125 °C 5
High-level output voltage VOH 4.4 V IOH = -50 µA; VCC = 4.5 V; Ta = -40 to 125 °C 5
High-level output voltage VOH 2.4 V IOH = -4 mA; VCC = 3.0 V; Ta = -40 to 125 °C 5
High-level output voltage VOH 3.7 V IOH = -8 mA; VCC = 4.5 V; Ta = -40 to 125 °C 5
Low-level output voltage VOL 0.1 V IOL = 50 µA; VCC = 2.0 V; Ta = -40 to 125 °C 5
Low-level output voltage VOL 0.55 V IOL = 4 mA; VCC = 3.0 V; Ta = -40 to 125 °C 5
Input leakage current IIN -2 2 µA VIN = 5.5 V or GND; VCC = 0 to 5.5 V; Ta = -40 to 125 °C 5
Quiescent supply current ICC 40 µA VIN = VCC or GND; VCC = 5.5 V; Ta = -40 to 125 °C 5
Propagation delay time tPLH,tPHL 1 10 ns VCC = 3.3 ±0.3 V; CL = 15 pF; Ta = -40 to 125 °C; tr = tf = 3 ns 5
Propagation delay time tPLH,tPHL 1 13.5 ns VCC = 3.3 ±0.3 V; CL = 50 pF; Ta = -40 to 125 °C; tr = tf = 3 ns 5
Propagation delay time tPLH,tPHL 1 7 ns VCC = 5.0 ±0.5 V; CL = 15 pF; Ta = -40 to 125 °C; tr = tf = 3 ns 5
Propagation delay time tPLH,tPHL 1 9 ns VCC = 5.0 ±0.5 V; CL = 50 pF; Ta = -40 to 125 °C; tr = tf = 3 ns 5
Input capacitance CIN 10 pF Ta = -40 to 125 °C; tr = tf = 3 ns 5

CAD (KiCad official)

  • Symbol: 74VHC21FT
  • Footprint: Adom_Gen:TOSHIBA_74
  • 3D model: TSSOP-14-175mil (KiCad packages3D, STEP)
  • 3D model files: 74vhc21ft-etched.step / 74vhc21ft-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 74vhc21ft.step / 74vhc21ft.glb are the bare package body.

Provenance

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

  • Datasheet: TOSHIBA datasheet (7 pp, sha256 24ef6f9c8328ac56, retrieved 2026-10-18, 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