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U74HCT541G-P20-R
Public Made by Adomby adom
UTC Unisonic Tech Buffers, Drivers, Receivers, Transceivers, TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
Generated by kicad-footprint-generator · KiCad file format 20260206
| Name | Last updated |
|---|---|
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| viewers | 6d ago |
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| u74hct541g-p20-r-etched.step | 6d ago |
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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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);u74hct541g-p20-r.step/u74hct541g-p20-r.glbare 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, 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).