component
74AC244MTCX
Public Made by Adomby adom
onsemi Buffers, Drivers, Receivers, Transceivers, TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdown74AC244MTCX
onsemi · Buffers, Drivers, Receivers, Transceivers · TSSOP-20
74AC244MTCX from onsemi, 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 3-STATE output enable input for the first buffer group, controlling outputs O0-O3 on pins 18, 16, 14, 12. |
| 2 | I0 | input | Data input I0, buffered to output O0 when OE1 is low. |
| 3 | O4 | tri_state | 3-STATE output O4, enabled by OE2 and driven from I4, sources/sinks 24mA. |
| 4 | I1 | input | Data input I1, buffered to output O1 when OE1 is low. |
| 5 | O5 | tri_state | 3-STATE output O5, enabled by OE2 and driven from I5, sources/sinks 24mA. |
| 6 | I2 | input | Data input I2, buffered to output O2 when OE1 is low. |
| 7 | O6 | tri_state | 3-STATE output O6, enabled by OE2 and driven from I6, sources/sinks 24mA. |
| 8 | I3 | input | Data input I3, buffered to output O3 when OE1 is low. |
| 9 | O7 | tri_state | 3-STATE output O7, enabled by OE2 and driven from I7, sources/sinks 24mA. |
| 10 | GND | power_in | Ground pin. |
| 11 | I7 | input | Data input I7, buffered to output O7 when OE2 is low. |
| 12 | O3 | tri_state | 3-STATE output O3, enabled by OE1 and driven from I3, sources/sinks 24mA. |
| 13 | I6 | input | Data input I6, buffered to output O6 when OE2 is low. |
| 14 | O2 | tri_state | 3-STATE output O2, enabled by OE1 and driven from I2, sources/sinks 24mA. |
| 15 | I5 | input | Data input I5, buffered to output O5 when OE2 is low. |
| 16 | O1 | tri_state | 3-STATE output O1, enabled by OE1 and driven from I1, sources/sinks 24mA. |
| 17 | I4 | input | Data input I4, buffered to output O4 when OE2 is low. |
| 18 | O0 | tri_state | 3-STATE output O0, enabled by OE1 and driven from I0, sources/sinks 24mA. |
| 19 | OE2 | input | Active-low 3-STATE output enable input for the second buffer group, controlling outputs O4-O7 on pins 3, 5, 7, 9. |
| 20 | VCC | power_in | Positive supply voltage pin. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | TSSOP-20 |
| Category | Logic |
| Pins | 20 |
CAD (KiCad official)
- Symbol:
74AC244MTCX - Footprint:
Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm - 3D model: TSSOP-20 (KiCad packages3D, STEP)
- 3D model files:
74ac244mtcx-etched.step/74ac244mtcx-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);74ac244mtcx.step/74ac244mtcx.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: onsemi datasheet (14 pp, sha256
2e2a222a0cf8049a, retrieved 2026-10-21, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(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).