# 74AVCH4T245BQ

**Nexperia** · Translators, Level Shifters · DHVQFN-16-EP(2.5x3.5)

74AVCH4T245BQ from Nexperia, in a DHVQFN-16-EP(2.5x3.5). 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 | VCC(A) | power_in | Supply voltage A (0.8 V to 3.6 V); references nAn, nOE, and nDIR inputs. |
| 2 | 1DIR | input | Direction control input for first transceiver; HIGH enables A to B transmission, LOW enables B to A transmission; referenced to VCC(A). |
| 3 | 2DIR | input | Direction control input for second transceiver; HIGH enables A to B transmission, LOW enables B to A transmission; referenced to VCC(A). |
| 4 | 1A1 | bidirectional | Data input/output of first A-port; bidirectional transceiver terminal with bus hold circuit; accepts voltages up to 3.6 V; referenced to VCC(A). |
| 5 | 1A2 | bidirectional | Data input/output of first A-port; bidirectional transceiver terminal with bus hold circuit; accepts voltages up to 3.6 V; referenced to VCC(A). |
| 6 | 2A1 | bidirectional | Data input/output of second A-port; bidirectional transceiver terminal with bus hold circuit; accepts voltages up to 3.6 V; referenced to VCC(A). |
| 7 | 2A2 | bidirectional | Data input/output of second A-port; bidirectional transceiver terminal with bus hold circuit; accepts voltages up to 3.6 V; referenced to VCC(A). |
| 8 | GND | power_in | Ground (0 V); all GND pins must be connected to ground. |
| 9 | GND | power_in | Ground (0 V); all GND pins must be connected to ground. |
| 10 | 2B2 | bidirectional | Data input/output of second B-port; bidirectional transceiver terminal with bus hold circuit; accepts voltages up to 3.6 V; referenced to VCC(B). |
| 11 | 2B1 | bidirectional | Data input/output of second B-port; bidirectional transceiver terminal with bus hold circuit; accepts voltages up to 3.6 V; referenced to VCC(B). |
| 12 | 1B2 | bidirectional | Data input/output of first B-port; bidirectional transceiver terminal with bus hold circuit; accepts voltages up to 3.6 V; referenced to VCC(B). |
| 13 | 1B1 | bidirectional | Data input/output of first B-port; bidirectional transceiver terminal with bus hold circuit; accepts voltages up to 3.6 V; referenced to VCC(B). |
| 14 | 2OE | input | Output enable input (active LOW) for second transceiver; HIGH places outputs in high-impedance OFF-state; referenced to VCC(A). |
| 15 | 1OE | input | Output enable input (active LOW) for first transceiver; HIGH places outputs in high-impedance OFF-state; referenced to VCC(A). |
| 16 | VCC(B) | power_in | Supply voltage B (0.8 V to 3.6 V); references nBn inputs. |
| 17 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Nexperia |
| Package | DHVQFN-16-EP(2.5x3.5) |
| Category | Logic |
| Pins | 17 |

## CAD (KiCad official)

- Symbol: `74AVCH4T245BQ`
- Footprint: `Package_DFN_QFN:DHVQFN-16-1EP_2.5x3.5mm_P0.5mm_EP1x2mm`
- 3D model: DHVQFN-16-EP(2.5x3.5), generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 0.9 mm nominal VQFN height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)
- 3D model files: `74avch4t245bq-etched.step` / `74avch4t245bq-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `74avch4t245bq.step` / `74avch4t245bq.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Nexperia datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588912993412898816) (26 pp, sha256 `594cbbc08d3597d2`, retrieved 2026-10-01, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.2`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-4-6` (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/74avch4t245bq-datasheet.pdf)