component
U74LVC244G-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.
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U74LVC244G-P20-R
UTC(Unisonic Tech) · Buffers, Drivers, Receivers, Transceivers · TSSOP-20
U74LVC244G-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 | 1OE | input | Active-low output enable for the first 4-bit driver (1A to 1Y); low passes data, high puts 1Y outputs in high-impedance. |
| 2 | 1A1 | input | Data input 1 of the first buffer group; accepts voltages up to 5.5V. |
| 3 | 2Y4 | tri_state | 3-state output 4 of the second buffer group; high-impedance when 2OE is high. |
| 4 | 1A2 | input | Data input 2 of the first buffer group; accepts voltages up to 5.5V. |
| 5 | 2Y3 | tri_state | 3-state output 3 of the second buffer group; high-impedance when 2OE is high. |
| 6 | 1A3 | input | Data input 3 of the first buffer group; accepts voltages up to 5.5V. |
| 7 | 2Y2 | tri_state | 3-state output 2 of the second buffer group; high-impedance when 2OE is high. |
| 8 | 1A4 | input | Data input 4 of the first buffer group; accepts voltages up to 5.5V. |
| 9 | 2Y1 | tri_state | 3-state output 1 of the second buffer group; high-impedance when 2OE is high. |
| 10 | GND | power_in | Ground (0V) supply pin. |
| 11 | 2A1 | input | Data input 1 of the second buffer group; accepts voltages up to 5.5V. |
| 12 | 1Y4 | tri_state | 3-state output 4 of the first buffer group; high-impedance when 1OE is high. |
| 13 | 2A2 | input | Data input 2 of the second buffer group; accepts voltages up to 5.5V. |
| 14 | 1Y3 | tri_state | 3-state output 3 of the first buffer group; high-impedance when 1OE is high. |
| 15 | 2A3 | input | Data input 3 of the second buffer group; accepts voltages up to 5.5V. |
| 16 | 1Y2 | tri_state | 3-state output 2 of the first buffer group; high-impedance when 1OE is high. |
| 17 | 2A4 | input | Data input 4 of the second buffer group; accepts voltages up to 5.5V. |
| 18 | 1Y1 | tri_state | 3-state output 1 of the first buffer group; high-impedance when 1OE is high. |
| 19 | 2OE | input | Active-low output enable for the second 4-bit driver (2A to 2Y); low passes data, high puts 2Y outputs in high-impedance. |
| 20 | VCC | power_in | Supply voltage, operating range 1.65V to 3.6V (absolute maximum -0.5V to 6.5V). |
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 |
|---|---|---|---|---|---|---|---|
| High-Level Output Voltage (VCC=1.65V, IOH=-4mA) | VOH | 1.29 | V | VCC=1.65V, IOH=-4mA | 4 | ||
| High-Level Output Voltage (VCC=2.3V, IOH=-8mA) | VOH | 1.9 | V | VCC=2.3V, IOH=-8mA | 4 | ||
| High-Level Output Voltage (VCC=2.7V, IOH=-12mA) | VOH | 2.2 | V | VCC=2.7V, IOH=-12mA | 4 | ||
| High-Level Output Voltage (VCC=3V, IOH=-12mA) | VOH | 2.4 | V | VCC=3V, IOH=-12mA | 4 | ||
| High-Level Output Voltage (VCC=3V, IOH=-24mA) | VOH | 2.3 | V | VCC=3V, IOH=-24mA | 4 | ||
| Low-Level Output Voltage (VCC=1.65V to 3.6V, IOL=100uA) | VOL | 0.1 | V | VCC=1.65V to 3.6V, IOL=100uA | 4 | ||
| Low-Level Output Voltage (VCC=1.65V, IOL=4mA) | VOL | 0.24 | V | VCC= 1.65V, IOL=4mA | 4 | ||
| Low-Level Output Voltage (VCC=2.3V, IOL=8mA) | VOL | 0.3 | V | VCC=2.3V, IOL=8mA | 4 | ||
| Low-Level Output Voltage (VCC=2.7V, IOL=12mA) | VOL | 0.4 | V | VCC=2.7V, IOL=12mA | 4 | ||
| Low-Level Output Voltage (VCC=3V, IOL=24mA) | VOL | 0.55 | V | VCC=3V, IOL=24mA | 4 | ||
| Input Leakage Current | II(LEAK) | -1 | 1 | μA | VCC=3.6V, VIN=5.5 V or GND | 4 | |
| Power OFF Leakage Current | IOFF | -1 | 1 | μA | VCC=0V, VIN or VOUT=5.5V | 4 | |
| Output OFF-State Current | IOZ | -1 | 1 | μA | VCC=3.6V, VOUT=0 or 5.5V | 4 | |
| Quiescent Supply Current | IQ | 1 | μA | VCC=3.6V, VIN=VCC or GND, IOUT=0 | 4 | ||
| Additional Quiescent Supply Current | IQ | 500 | μA | VCC=2.7V to 3.6V, One input at VCC-0.6V, Other inputs at VCC or GND | 4 | ||
| Propagation delay From Input(A) to Output(Y) | tpd | 1 | 7 | 14.4 | ns | VCC=1.5V | 4 |
| Propagation delay From Input(A) to Output(Y) | tpd | 1 | 5.9 | 10.4 | ns | VCC=1.8V±0.15V | 4 |
| Propagation delay From Input(A) to Output(Y) | tpd | 1 | 4.2 | 7.4 | ns | VCC=2.5V±0.2V | 4 |
| Propagation delay From Input(A) to Output(Y) | tpd | 1 | 4.2 | 6.7 | ns | VCC=2.7V | 4 |
| Propagation delay From Input(A) to Output(Y) | tpd | 1.5 | 3.9 | 5.7 | ns | VCC=3.3V±0.3V | 4 |
| Enable time From Input(OE) to Output(Y) | ten | 1 | 8.3 | 17.8 | ns | VCC=1.5V | 4 |
| Enable time From Input(OE) to Output(Y) | ten | 1 | 6.4 | 12.1 | ns | VCC=1.8V±0.15V | 4 |
| Enable time From Input(OE) to Output(Y) | ten | 1 | 4.6 | 9.1 | ns | VCC=2.5V±0.2V | 4 |
| Enable time From Input(OE) to Output(Y) | ten | 1 | 5 | 8.4 | ns | VCC=2.7V | 4 |
| Enable time From Input(OE) to Output(Y) | ten | 1.5 | 4.5 | 7.4 | ns | VCC=3.3V±0.3V | 4 |
| Disable time From Input(OE) to Output(Y) | tdis | 1 | 7.2 | 15.6 | ns | VCC=1.5V | 4 |
| Disable time From Input(OE) to Output(Y) | tdis | 1 | 5.8 | 11.6 | ns | VCC=1.8V±0.15V | 4 |
| Disable time From Input(OE) to Output(Y) | tdis | 1 | 3.7 | 7.3 | ns | VCC=2.5V±0.2V | 4 |
| Disable time From Input(OE) to Output(Y) | tdis | 1 | 3.8 | 6.6 | ns | VCC=2.7V | 4 |
| Disable time From Input(OE) to Output(Y) | tdis | 1.5 | 3.8 | 6.3 | ns | VCC=3.3V±0.3V | 4 |
| Supply Voltage | VCC | 1.65 | 3.6 | V | 3 | ||
| Supply Voltage (data retention) | VCC | 1.5 | V | Data retention only | 3 | ||
| Input Voltage | VIN | 0 | 5.5 | V | 3 | ||
| Output Voltage | VOUT | 0 | V | 3 | |||
| High-Level Input Voltage | VIH | 1.7 | V | VCC=2.3V to 2.7V | 3 | ||
| High-Level Input Voltage | VIH | 2 | V | VCC=2.7V to 3.6V | 3 | ||
| Low-Level Input Voltage | VIL | 0.7 | V | VCC=2.3V to 2.7V | 3 | ||
| Low-Level Input Voltage | VIL | 0.8 | V | VCC=2.7V to 3.6V | 3 | ||
| High-Level Output Current | IOH | -4 | mA | VCC=1.65V | 3 | ||
| High-Level Output Current | IOH | -8 | mA | VCC=2.3V | 3 | ||
| High-Level Output Current | IOH | -12 | mA | VCC=2.7V | 3 | ||
| High-Level Output Current | IOH | -24 | mA | VCC=3V | 3 | ||
| Low-Level Output Current | IOL | 4 | mA | VCC=1.65V | 3 | ||
| Low-Level Output Current | IOL | 8 | mA | VCC=2.3V | 3 | ||
| Low-Level Output Current | IOL | 12 | mA | VCC=2.7V | 3 | ||
| Low-Level Output Current | IOL | 24 | mA | VCC=3V | 3 | ||
| Input Rise and Fall Times | tr / tf | 0 | 20 | ns/V | VCC=1.65V to 2.7V | 3 | |
| Input Rise and Fall Times | tr / tf | 0 | 10 | ns/V | VCC=2.7V to 3.6V | 3 | |
| Supply Voltage (absolute maximum) | VCC | -0.5 | 6.5 | V | 3 | ||
| Input Voltage (absolute maximum) | VIN | -0.5 | 6.5 | V | 3 | ||
| Output Voltage (absolute maximum) | VOUT | -0.5 | 6.5 | V | Output in high-impedance or power-off state | 3 | |
| Output Voltage (absolute maximum) | VOUT | -0.5 | V | Output in high or low state | 3 | ||
| Input Clamp Current | IIK | -50 | mA | 3 | |||
| Output Clamp Current | IOK | -50 | mA | 3 | |||
| Output Current | IOUT | -50 | 50 | mA | 3 | ||
| VCC or GND Current | ICC | -100 | 100 | mA | 3 | ||
| Operating Temperature | TOPR | -40 | 125 | °C | 3 | ||
| Storage Temperature | TSTG | -65 | 150 | °C | 3 | ||
| Junction to Ambient (TSSOP-20) | θJA | 83 | °C/W | TSSOP-20 | 3 |
CAD (KiCad official)
- Symbol:
U74LVC244G-P20-R - Footprint:
Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm - 3D model: TSSOP-20 (KiCad packages3D, STEP)
- 3D model files:
u74lvc244g-p20-r-etched.step/u74lvc244g-p20-r-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);u74lvc244g-p20-r.step/u74lvc244g-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
87183f81251e2aa8, retrieved 2026-10-22, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-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).
# U74LVC244G-P20-R
**UTC(Unisonic Tech)** · Buffers, Drivers, Receivers, Transceivers · TSSOP-20
U74LVC244G-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 | 1OE | input | Active-low output enable for the first 4-bit driver (1A to 1Y); low passes data, high puts 1Y outputs in high-impedance. |
| 2 | 1A1 | input | Data input 1 of the first buffer group; accepts voltages up to 5.5V. |
| 3 | 2Y4 | tri_state | 3-state output 4 of the second buffer group; high-impedance when 2OE is high. |
| 4 | 1A2 | input | Data input 2 of the first buffer group; accepts voltages up to 5.5V. |
| 5 | 2Y3 | tri_state | 3-state output 3 of the second buffer group; high-impedance when 2OE is high. |
| 6 | 1A3 | input | Data input 3 of the first buffer group; accepts voltages up to 5.5V. |
| 7 | 2Y2 | tri_state | 3-state output 2 of the second buffer group; high-impedance when 2OE is high. |
| 8 | 1A4 | input | Data input 4 of the first buffer group; accepts voltages up to 5.5V. |
| 9 | 2Y1 | tri_state | 3-state output 1 of the second buffer group; high-impedance when 2OE is high. |
| 10 | GND | power_in | Ground (0V) supply pin. |
| 11 | 2A1 | input | Data input 1 of the second buffer group; accepts voltages up to 5.5V. |
| 12 | 1Y4 | tri_state | 3-state output 4 of the first buffer group; high-impedance when 1OE is high. |
| 13 | 2A2 | input | Data input 2 of the second buffer group; accepts voltages up to 5.5V. |
| 14 | 1Y3 | tri_state | 3-state output 3 of the first buffer group; high-impedance when 1OE is high. |
| 15 | 2A3 | input | Data input 3 of the second buffer group; accepts voltages up to 5.5V. |
| 16 | 1Y2 | tri_state | 3-state output 2 of the first buffer group; high-impedance when 1OE is high. |
| 17 | 2A4 | input | Data input 4 of the second buffer group; accepts voltages up to 5.5V. |
| 18 | 1Y1 | tri_state | 3-state output 1 of the first buffer group; high-impedance when 1OE is high. |
| 19 | 2OE | input | Active-low output enable for the second 4-bit driver (2A to 2Y); low passes data, high puts 2Y outputs in high-impedance. |
| 20 | VCC | power_in | Supply voltage, operating range 1.65V to 3.6V (absolute maximum -0.5V to 6.5V). |
## 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 |
|---|---|---|---|---|---|---|---|
| High-Level Output Voltage (VCC=1.65V, IOH=-4mA) | VOH | 1.29 | | | V | VCC=1.65V, IOH=-4mA | 4 |
| High-Level Output Voltage (VCC=2.3V, IOH=-8mA) | VOH | 1.9 | | | V | VCC=2.3V, IOH=-8mA | 4 |
| High-Level Output Voltage (VCC=2.7V, IOH=-12mA) | VOH | 2.2 | | | V | VCC=2.7V, IOH=-12mA | 4 |
| High-Level Output Voltage (VCC=3V, IOH=-12mA) | VOH | 2.4 | | | V | VCC=3V, IOH=-12mA | 4 |
| High-Level Output Voltage (VCC=3V, IOH=-24mA) | VOH | 2.3 | | | V | VCC=3V, IOH=-24mA | 4 |
| Low-Level Output Voltage (VCC=1.65V to 3.6V, IOL=100uA) | VOL | | | 0.1 | V | VCC=1.65V to 3.6V, IOL=100uA | 4 |
| Low-Level Output Voltage (VCC=1.65V, IOL=4mA) | VOL | | | 0.24 | V | VCC= 1.65V, IOL=4mA | 4 |
| Low-Level Output Voltage (VCC=2.3V, IOL=8mA) | VOL | | | 0.3 | V | VCC=2.3V, IOL=8mA | 4 |
| Low-Level Output Voltage (VCC=2.7V, IOL=12mA) | VOL | | | 0.4 | V | VCC=2.7V, IOL=12mA | 4 |
| Low-Level Output Voltage (VCC=3V, IOL=24mA) | VOL | | | 0.55 | V | VCC=3V, IOL=24mA | 4 |
| Input Leakage Current | II(LEAK) | -1 | | 1 | μA | VCC=3.6V, VIN=5.5 V or GND | 4 |
| Power OFF Leakage Current | IOFF | -1 | | 1 | μA | VCC=0V, VIN or VOUT=5.5V | 4 |
| Output OFF-State Current | IOZ | -1 | | 1 | μA | VCC=3.6V, VOUT=0 or 5.5V | 4 |
| Quiescent Supply Current | IQ | | | 1 | μA | VCC=3.6V, VIN=VCC or GND, IOUT=0 | 4 |
| Additional Quiescent Supply Current | IQ | | | 500 | μA | VCC=2.7V to 3.6V, One input at VCC-0.6V, Other inputs at VCC or GND | 4 |
| Propagation delay From Input(A) to Output(Y) | tpd | 1 | 7 | 14.4 | ns | VCC=1.5V | 4 |
| Propagation delay From Input(A) to Output(Y) | tpd | 1 | 5.9 | 10.4 | ns | VCC=1.8V±0.15V | 4 |
| Propagation delay From Input(A) to Output(Y) | tpd | 1 | 4.2 | 7.4 | ns | VCC=2.5V±0.2V | 4 |
| Propagation delay From Input(A) to Output(Y) | tpd | 1 | 4.2 | 6.7 | ns | VCC=2.7V | 4 |
| Propagation delay From Input(A) to Output(Y) | tpd | 1.5 | 3.9 | 5.7 | ns | VCC=3.3V±0.3V | 4 |
| Enable time From Input(OE) to Output(Y) | ten | 1 | 8.3 | 17.8 | ns | VCC=1.5V | 4 |
| Enable time From Input(OE) to Output(Y) | ten | 1 | 6.4 | 12.1 | ns | VCC=1.8V±0.15V | 4 |
| Enable time From Input(OE) to Output(Y) | ten | 1 | 4.6 | 9.1 | ns | VCC=2.5V±0.2V | 4 |
| Enable time From Input(OE) to Output(Y) | ten | 1 | 5 | 8.4 | ns | VCC=2.7V | 4 |
| Enable time From Input(OE) to Output(Y) | ten | 1.5 | 4.5 | 7.4 | ns | VCC=3.3V±0.3V | 4 |
| Disable time From Input(OE) to Output(Y) | tdis | 1 | 7.2 | 15.6 | ns | VCC=1.5V | 4 |
| Disable time From Input(OE) to Output(Y) | tdis | 1 | 5.8 | 11.6 | ns | VCC=1.8V±0.15V | 4 |
| Disable time From Input(OE) to Output(Y) | tdis | 1 | 3.7 | 7.3 | ns | VCC=2.5V±0.2V | 4 |
| Disable time From Input(OE) to Output(Y) | tdis | 1 | 3.8 | 6.6 | ns | VCC=2.7V | 4 |
| Disable time From Input(OE) to Output(Y) | tdis | 1.5 | 3.8 | 6.3 | ns | VCC=3.3V±0.3V | 4 |
| Supply Voltage | VCC | 1.65 | | 3.6 | V | | 3 |
| Supply Voltage (data retention) | VCC | 1.5 | | | V | Data retention only | 3 |
| Input Voltage | VIN | 0 | | 5.5 | V | | 3 |
| Output Voltage | VOUT | 0 | | | V | | 3 |
| High-Level Input Voltage | VIH | 1.7 | | | V | VCC=2.3V to 2.7V | 3 |
| High-Level Input Voltage | VIH | 2 | | | V | VCC=2.7V to 3.6V | 3 |
| Low-Level Input Voltage | VIL | | | 0.7 | V | VCC=2.3V to 2.7V | 3 |
| Low-Level Input Voltage | VIL | | | 0.8 | V | VCC=2.7V to 3.6V | 3 |
| High-Level Output Current | IOH | -4 | | | mA | VCC=1.65V | 3 |
| High-Level Output Current | IOH | -8 | | | mA | VCC=2.3V | 3 |
| High-Level Output Current | IOH | -12 | | | mA | VCC=2.7V | 3 |
| High-Level Output Current | IOH | -24 | | | mA | VCC=3V | 3 |
| Low-Level Output Current | IOL | | | 4 | mA | VCC=1.65V | 3 |
| Low-Level Output Current | IOL | | | 8 | mA | VCC=2.3V | 3 |
| Low-Level Output Current | IOL | | | 12 | mA | VCC=2.7V | 3 |
| Low-Level Output Current | IOL | | | 24 | mA | VCC=3V | 3 |
| Input Rise and Fall Times | tr / tf | 0 | | 20 | ns/V | VCC=1.65V to 2.7V | 3 |
| Input Rise and Fall Times | tr / tf | 0 | | 10 | ns/V | VCC=2.7V to 3.6V | 3 |
| Supply Voltage (absolute maximum) | VCC | -0.5 | | 6.5 | V | | 3 |
| Input Voltage (absolute maximum) | VIN | -0.5 | | 6.5 | V | | 3 |
| Output Voltage (absolute maximum) | VOUT | -0.5 | | 6.5 | V | Output in high-impedance or power-off state | 3 |
| Output Voltage (absolute maximum) | VOUT | -0.5 | | | V | Output in high or low state | 3 |
| Input Clamp Current | IIK | -50 | | | mA | | 3 |
| Output Clamp Current | IOK | -50 | | | mA | | 3 |
| Output Current | IOUT | -50 | | 50 | mA | | 3 |
| VCC or GND Current | ICC | -100 | | 100 | mA | | 3 |
| Operating Temperature | TOPR | -40 | | 125 | °C | | 3 |
| Storage Temperature | TSTG | -65 | | 150 | °C | | 3 |
| Junction to Ambient (TSSOP-20) | θJA | | | 83 | °C/W | TSSOP-20 | 3 |
## CAD (KiCad official)
- Symbol: `U74LVC244G-P20-R`
- Footprint: `Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm`
- 3D model: TSSOP-20 (KiCad packages3D, STEP)
- 3D model files: `u74lvc244g-p20-r-etched.step` / `u74lvc244g-p20-r-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `u74lvc244g-p20-r.step` / `u74lvc244g-p20-r.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [UTC(Unisonic Tech) datasheet](docs/u74lvc244g-p20-r-datasheet.pdf) (6 pp, sha256 `87183f81251e2aa8`, retrieved 2026-10-22, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-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](docs/u74lvc244g-p20-r-datasheet.pdf)