74LVX4245MTCX

@@ -0,0 +1,67 @@+# 74LVX4245MTCX++**onsemi** · Buffer/Driver/Transceiver · TSSOP-24++74LVX4245MTCX from onsemi, in a TSSOP-24. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | VCCA | power_in | A-side supply voltage, 4.5V to 5.5V. Powers the 5V A-port I/O and the control logic; must be powered up before VCCB. |+| 2 | T/R | input | Transmit/Receive direction control input, referenced to VCCA. HIGH = A-to-B (transmit); LOW = B-to-A (receive). TTL-compatible. |+| 3 | A0 | bidirectional | A-side bit 0. 5V bus I/O; sources/sinks 24 mA. Tri-stated when OE is HIGH; direction set by T/R. |+| 4 | A1 | bidirectional | A-side bit 1. 5V bus I/O; sources/sinks 24 mA. Tri-stated when OE is HIGH; direction set by T/R. |+| 5 | A2 | bidirectional | A-side bit 2. 5V bus I/O; sources/sinks 24 mA. Tri-stated when OE is HIGH; direction set by T/R. |+| 6 | A3 | bidirectional | A-side bit 3. 5V bus I/O; sources/sinks 24 mA. Tri-stated when OE is HIGH; direction set by T/R. |+| 7 | A4 | bidirectional | A-side bit 4. 5V bus I/O; sources/sinks 24 mA. Tri-stated when OE is HIGH; direction set by T/R. |+| 8 | A5 | bidirectional | A-side bit 5. 5V bus I/O; sources/sinks 24 mA. Tri-stated when OE is HIGH; direction set by T/R. |+| 9 | A6 | bidirectional | A-side bit 6. 5V bus I/O; sources/sinks 24 mA. Tri-stated when OE is HIGH; direction set by T/R. |+| 10 | A7 | bidirectional | A-side bit 7. 5V bus I/O; sources/sinks 24 mA. Tri-stated when OE is HIGH; direction set by T/R. |+| 11 | GND | power_in | Ground reference for both A- and B-side circuitry. Tie to system ground; both GND pins (11 and 12) must be connected. |+| 12 | GND | power_in | Ground reference for both A- and B-side circuitry. Tie to system ground; both GND pins (11 and 12) must be connected. |+| 13 | GND | power_in | Ground reference for both A- and B-side circuitry. Tie to system ground; both GND pins (13 and 14) must be connected. |+| 14 | GND | power_in | Ground reference for both A- and B-side circuitry. Tie to system ground; both GND pins (13 and 14) must be connected. |+| 15 | B7 | bidirectional | B-side bit 7. 3V bus I/O; sources/sinks 12 mA. Tri-stated when OE is HIGH; direction set by T/R. |+| 16 | B6 | bidirectional | B-side bit 6. 3V bus I/O; sources/sinks 12 mA. Tri-stated when OE is HIGH; direction set by T/R. |+| 17 | B5 | bidirectional | B-side bit 5. 3V bus I/O; sources/sinks 12 mA. Tri-stated when OE is HIGH; direction set by T/R. |+| 18 | B4 | bidirectional | B-side bit 4. 3V bus I/O; sources/sinks 12 mA. Tri-stated when OE is HIGH; direction set by T/R. |+| 19 | B3 | bidirectional | B-side bit 3. 3V bus I/O; sources/sinks 12 mA. Tri-stated when OE is HIGH; direction set by T/R. |+| 20 | B2 | bidirectional | B-side bit 2. 3V bus I/O; sources/sinks 12 mA. Tri-stated when OE is HIGH; direction set by T/R. |+| 21 | B1 | bidirectional | B-side bit 1. 3V bus I/O; sources/sinks 12 mA. Tri-stated when OE is HIGH; direction set by T/R. |+| 22 | B0 | bidirectional | B-side bit 0. 3V bus I/O; sources/sinks 12 mA. Tri-stated when OE is HIGH; direction set by T/R. |+| 23 | OE | input | Active-LOW Output Enable. When HIGH, both A and B ports are placed in HIGH-Z (3-STATE). TTL-compatible; should ramp with or ahead of VCCA at power-up to prevent bus contention. |+| 24 | VCCB | power_in | B-side supply voltage, 2.7V to 3.6V. Powers the 3V B-port I/O; power up after VCCA. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | onsemi |+| Package | TSSOP-24 |+| Category | Logic |+| Pins | 24 |++## Ordering variants++- `74LVX4245MTCX`+- `74LVX4245MTCXWM`+- `74LVX4245MTCXWMX`+- `74LVX4245MTCXQSC`+- `74LVX4245MTCXQSCX`++## CAD (KiCad official)++- Symbol: `74LVX4245MTCX`+- Footprint: `Package_SO:TSSOP-24_4.4x7.8mm_P0.65mm`+- 3D model: TSSOP-24 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [onsemi datasheet](https://www.onsemi.com/pdf/datasheet/74lvx4245mtcx-d.pdf) (8 pp, sha256 `763a22477bfe4497`, retrieved 2026-08-17, tier: manufacturer)+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/74lvx4245mtcx-datasheet.pdf)

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