component
BU9796AMUV-E2
Public Made by Adomby adom
ROHM Semicon LCD Drivers, VQFN-24-EP(4x4). 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
markdownBU9796AMUV-E2
ROHM Semicon · LCD Drivers · VQFN-24-EP(4x4)
BU9796AMUV-E2 from ROHM Semicon, in a VQFN-24-EP(4x4). 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 | OSCIN | input | External clock input; external or internal clock selectable by command, and must be connected to VSS when using the internal oscillation circuit. |
| 2 | SCL | input | Serial data transfer clock input of the 2-wire interface (VIH 0.7VDD min, VIL 0.3VDD max). |
| 3 | SDA | bidirectional | Serial data in-out terminal of the 2-wire interface (VIH 0.7VDD min, VIL 0.3VDD max). |
| 4 | SEG0 | output | Segment output for LCD driving. |
| 5 | SEG1 | output | Segment output for LCD driving. |
| 6 | SEG2 | output | Segment output for LCD driving. |
| 7 | SEG3 | output | Segment output for LCD driving. |
| 8 | SEG4 | output | Segment output for LCD driving. |
| 9 | SEG5 | output | Segment output for LCD driving. |
| 10 | SEG6 | output | Segment output for LCD driving. |
| 11 | SEG7 | output | Segment output for LCD driving. |
| 12 | SEG8 | output | Segment output for LCD driving. |
| 13 | SEG9 | output | Segment output for LCD driving. |
| 14 | SEG10 | output | Segment output for LCD driving. |
| 15 | SEG11 | output | Segment output for LCD driving. |
| 16 | COM0 | output | Common output for LCD driving. |
| 17 | COM1 | output | Common output for LCD driving. |
| 18 | COM2 | output | Common output for LCD driving. |
| 19 | COM3 | output | Common output for LCD driving. |
| 20 | VLCD | power_in | Power supply for LCD driving, range 0 to VDD-2.4 V (VDD-VLCD must be at least 2.4 V). |
| 21 | VDD | power_in | Power supply, 2.5 V to 5.5 V recommended (absolute maximum -0.5 to +7.0 V). |
| 22 | VSS | power_in | Ground (0 V). |
| 23 | TEST1 | input | Test input for ROHM use only; must be connected to VSS. |
| 24 | TEST2 | input | Test input for ROHM use only; L enables the POR circuit, H disables it (see Cautions in Power ON/OFF). |
| 25 | EXT-PAD | passive | Substrate exposed pad on the bottom for heat radiation; connect to a board pad and supply VSS level or leave open. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | ROHM Semicon |
| Package | VQFN-24-EP(4x4) |
| Category | Nixie Tube Driver/LED Driver |
| Pins | 25 |
CAD (KiCad official)
- Symbol:
BU9796AMUV-E2 - Footprint:
Package_DFN_QFN:QFN-24-1EP_4x4mm_P0.5mm_EP2.6x2.6mm - 3D model: VQFN-24-EP(4x4) (KiCad packages3D, STEP)
- 3D model files:
bu9796amuv-e2-etched.step/bu9796amuv-e2-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bu9796amuv-e2.step/bu9796amuv-e2.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: ROHM Semicon datasheet (31 pp, sha256
8212ebb84e7ad6d2, retrieved 2026-10-23, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-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).