component
REF1933AIDDCR
Public Unreviewedby Ray
Texas Instruments Voltage Reference, SOT-23-5. Datasheet-verified pinout, 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
markdownREF1933AIDDCR
Texas Instruments · Voltage Reference · SOT-23-5
REF1933AIDDCR from Texas Instruments, in a SOT-23-5. 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 | VBIAS | output | Bias voltage output equal to VREF/2 (1.65 V for REF1933). Used to bias bipolar signals into the midpoint of a single-supply ADC input range. Sources and sinks up to ±20 mA. |
| 2 | GND | power_in | Device ground return. All voltages are referenced to this pin. |
| 3 | EN | input | Enable input. Device is enabled when EN ≥ VIN − 0.7 V and placed in shutdown when EN ≤ 0.7 V. Shutdown current is typically 3.3 µA. |
| 4 | VIN | power_in | Input supply voltage. Recommended operating range VREF + 0.02 V to 5.5 V; absolute maximum 6 V. Dropout is 10 mV typical at IL = 0 mA. |
| 5 | VREF | output | Reference voltage output (3.3 V for REF1933). ±0.1% initial accuracy, 25 ppm/°C max temperature coefficient. Sources and sinks up to ±20 mA; stable with 0-10 µF output capacitor. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-23-5 |
| Category | PMIC |
| Pins | 5 |
Ordering variants
Same part, different packaging or reel option.
REF1933AIDDCRREF1933AIDDCT
CAD (KiCad official)
- Symbol:
REF1933AIDDCR - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (32 pp, sha256
193572512ed1817b, retrieved 2026-08-17, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- 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).