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U74HCT541G-P20-R

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UTC Unisonic Tech Buffers, Drivers, Receivers, Transceivers, TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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U74HCT541G-P20-R

UTC Unisonic Tech · Buffers, Drivers, Receivers, Transceivers · TSSOP-20

U74HCT541G-P20-R from UTC Unisonic Tech, 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 OE1 input Active-low output-enable input 1; if OE1 or OE2 is high all eight outputs are high-impedance.
2 A1 input Data input 1, TTL-voltage compatible, with low input current of 1uA max.
3 A2 input Data input 2, TTL-voltage compatible, with low input current of 1uA max.
4 A3 input Data input 3, TTL-voltage compatible, with low input current of 1uA max.
5 A4 input Data input 4, TTL-voltage compatible, with low input current of 1uA max.
6 A5 input Data input 5, TTL-voltage compatible, with low input current of 1uA max.
7 A6 input Data input 6, TTL-voltage compatible, with low input current of 1uA max.
8 A7 input Data input 7, TTL-voltage compatible, with low input current of 1uA max.
9 A8 input Data input 8, TTL-voltage compatible, with low input current of 1uA max.
10 GND power_in Ground (0 V) supply pin.
11 Y8 tri_state 3-state data output 8 (true data from A8), ±6mA output drive at 5V.
12 Y7 tri_state 3-state data output 7 (true data from A7), ±6mA output drive at 5V.
13 Y6 tri_state 3-state data output 6 (true data from A6), ±6mA output drive at 5V.
14 Y5 tri_state 3-state data output 5 (true data from A5), ±6mA output drive at 5V.
15 Y4 tri_state 3-state data output 4 (true data from A4), ±6mA output drive at 5V.
16 Y3 tri_state 3-state data output 3 (true data from A3), ±6mA output drive at 5V.
17 Y2 tri_state 3-state data output 2 (true data from A2), ±6mA output drive at 5V.
18 Y1 tri_state 3-state data output 1 (true data from A1), ±6mA output drive at 5V.
19 OE2 input Active-low output-enable input 2; if OE1 or OE2 is high all eight outputs are high-impedance.
20 VCC power_in Supply voltage, recommended 4.5V to 5.5V (absolute max -0.5 to 7 V).

Key specifications

Parameter Value
Manufacturer UTC Unisonic Tech
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
Supply Voltage VCC 4.5 5 5.5 V 4
High-level Input Voltage VIH 2 V VCC=4.5V~5.5V 4
Low-level Input Voltage VIL 0.8 V VCC=4.5V~5.5V 4
Input Voltage VIN 0 V 4
Output Voltage VOUT 0 V 4
Input transition Rise or Fall rate ∆t/∆v 500 ns 4
Operating Temperature TA -40 125 °C 4
Supply Voltage VCC -0.5 7 V 4
Input Voltage VIN -0.5 7 V 4
VCC or GND Current ICC -70 70 mA 4
Output Current IOUT -35 35 mA 4
Input Clamp Current IIK -20 20 mA 4
Output Clamp Current IOK -20 20 mA 4
Storage Temperature TSTG -65 150 °C 4
Junction to Ambient, TSSOP-20 θJA 83 °C/W TSSOP-20 4
High-Level Output Voltage VOH 4.4 4.499 V VCC=4.5V, VI=VIH or VIL, IOH=-20μA 4
High-Level Output Voltage VOH 5.4 5.499 V VCC=5.5V, VI=VIH or VIL, IOH=-20μA 4
High-Level Output Voltage VOH 3.98 4.3 V VCC=4.5V, VI=VIH or VIL, IOH=-6mA 4
Output Voltage Low-Level VOL 0.001 0.1 V VCC=4.5V, VI=VIH or VIL, IOL=20μA 4
Output Voltage Low-Level VOL 0.17 0.26 V VCC=4.5V, VI=VIH or VIL, IOL=6mA 4
Input Leakage Current II(LEAK) -100 0.1 100 nA VCC=5.5V, VIN=VCC or GND 4
3-state Output Off-state Current IOZ -0.5 0.01 0.5 μA VCC=5.5V, VOUT=VCC or GND, VI=VIH or VIL 4
Quiescent Supply Current ICC 4 μA VCC=5.5V, VIN=VCC or GND, IOUT=0 4
Additional Quiescent Device Current Per Input Pin ∆ICC 1.4 2.4 mA VCC=5.5V, one input at 0.5V or 2.4V, other inputs at 0 or VCC 4
Input Capacitance CI 3 10 pF VCC=4.5V~5.5V 4
Propagation delay from Input (A) to Output (Y) tPLH/tPHL 13 23 ns CL=50pF, VCC=4.5V 4
Propagation delay from Input (A) to Output (Y) tPLH/tPHL 13 21 ns CL=50pF, VCC=5.5V 4
Propagation delay from Input OE to Output (Y) tPZL/tPZH 21 30 ns CL=50pF, VCC=4.5V 4
Propagation delay from Input OE to Output (Y) tPZL/tPZH 19 27 ns CL=50pF, VCC=5.5V 4
Propagation delay from Input OE to Output (Y) tPLZ/tPHZ 19 30 ns CL=50pF, VCC=4.5V 4
Propagation delay from Input OE to Output (Y) tPLZ/tPHZ 18 27 ns CL=50pF, VCC=5.5V 4
Propagation delay from Input (Y) tt 8 12 ns CL=150pF, VCC=4.5V 5
Propagation delay from Input (Y) tt 7 11 ns CL=150pF, VCC=5.5V 5
Propagation delay from Input (A) to Output (Y) tPLH/tPHL 20 33 ns CL=150pF, VCC=4.5V 5
Propagation delay from Input (A) to Output (Y) tPLH/tPHL 19 30 ns CL=150pF, VCC=5.5V 5
Propagation delay from Input OE to Output (Y) tPZL/tPZH 26 40 ns CL=150pF, VCC=4.5V 5
Propagation delay from Input OE to Output (Y) tPZL/tPZH 25 36 ns CL=150pF, VCC=5.5V 5
Propagation delay from Input (Y) tt 17 42 ns CL=150pF, VCC=4.5V 5
Propagation delay from Input (Y) tt 14 38 ns CL=150pF, VCC=5.5V 5

CAD (KiCad official)

  • Symbol: U74HCT541G-P20-R
  • Footprint: Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm
  • 3D model: TSSOP-20 (KiCad packages3D, STEP)
  • 3D model files: u74hct541g-p20-r-etched.step / u74hct541g-p20-r-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); u74hct541g-p20-r.step / u74hct541g-p20-r.glb are the bare package body.

Provenance

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

  • Datasheet: UTC Unisonic Tech datasheet (6 pp, sha256 63098d28ac2c587d, retrieved 2026-10-18, 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