# ZJR1000-9AUABR

**ZJW** · Voltage Reference · MSOP-8

ZJR1000-9AUABR from ZJW, in a MSOP-8. 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 | DNC | unconnected | Do Not Connect. Pin has an actual internal connection reserved for factory testing; do not connect anything to it or the device may not function properly. |
| 2 | VIN | power_in | Input supply voltage. Operating range is VOUT+0.3 V to 15 V (2.5 V min for ZJR1000-1/-2 variants). Recommended to bypass with 0.1 µF to 10 µF ceramic capacitor close to the pin. |
| 3 | SHDN | input | Active-low shutdown input. Pulling low powers the device down to 16 µA typical. VIL ≤ 0.8 V, VIH ≥ 2 V (up to VIN). CMOS/TTL compatible with an internal pull-up; recommended to tie high externally for best performance during normal operation. |
| 4 | GND | power_in | Ground reference pin = 0 V. Connect to system ground plane; keep the return path low-impedance. |
| 5 | TRIM | input | Trim terminal for adjusting the output voltage over a ±0.5% range without affecting temperature coefficient. Typically connected to a low-tempco resistor divider network (with wiper going to TRIM) between VOUT and GND. Leave open if adjustment is not needed. |
| 6 | VOUT | power_out | Precision voltage reference output. For ZJR1000-9 the nominal output is 2.5 V with ±0.05% initial accuracy. Requires a 0.1 µF to 10 µF output decoupling capacitor with ESR ≤ 1.5 Ω for stability. Short-circuit current is typically 20 mA. |
| 7 | NIC | unconnected | No Internal Connection. Pin has no internal circuitry; may be left floating or tied to GND. |
| 8 | DNC | unconnected | Do Not Connect. Reserved for factory testing purposes. Do not connect anything or device may malfunction. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | ZJW |
| Package | MSOP-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |

## Ordering variants

Same part, different packaging or reel option.

- `ZJR1000-9AUABT`
- `ZJR1000-9AUABR`
- `ZJR1000-9AUABRBUABT`
- `ZJR1000-9AUABRBUABR`
- `ZJR1000-9AUABRCUABT`
- `ZJR1000-9AUABRCUABR`
- `ZJR1000-9AUABRASABT`
- `ZJR1000-9AUABRASABR`
- `ZJR1000-9AUABRBSABT`
- `ZJR1000-9AUABRBSABR`
- `ZJR1000-9AUABRCSABT`
- `ZJR1000-9AUABRCSABR`

## CAD (KiCad official)

- Symbol: `ZJR1000-9AUABR`
- Footprint: `Package_SO:MSOP-8_3x3mm_P0.65mm`
- 3D model: MSOP-8 (KiCad packages3D, STEP)
- 3D model files: `zjr1000-9auabr-etched.step` / `zjr1000-9auabr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `zjr1000-9auabr.step` / `zjr1000-9auabr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [ZJW datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590917048971313152) (None pp, sha256 `6a899a348087251c`, retrieved 2026-08-17, tier: lcsc)
- **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/zjr1000-9auabr-datasheet.pdf)