component
UC3842AD8TR
Public Made by Adomby adom
Texas Instruments AC-DC Controllers And Regulators, SOIC-8. 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
markdownUC3842AD8TR
Texas Instruments · AC-DC Controllers And Regulators · SOIC-8
UC3842AD8TR from Texas Instruments, in a SOIC-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 | COMP | output | Low impedance 1MHz internal error amplifier output with 80dB open loop gain; input to peak current limiting or PWM comparator; maximum sink current 6mA with no internal current limiting. |
| 2 | FB | input | Error amplifier input for controlling power converter voltage feedback loop stability. |
| 3 | ISENSE | input | Peak current limiting or PWM comparator input with maximum peak current sense signal internally clamped at 1V; controls cycle-by-cycle peak current limiting with current sense resistor. |
| 4 | RT/CT | input | Internal oscillator timing input programmed with external timing resistor RT and capacitor CT; recommended capacitor value 470pF to 4.7nF, recommended resistor value 5kΩ to 100kΩ. |
| 5 | GND | power_in | Control signal ground. |
| 6 | OUTPUT | output | 1A totem pole gate driver output capable of sourcing and sinking up to 1A of gate driver current; gate driver resistor required to limit current. |
| 7 | VCC | power_in | Gate driver bias supply voltage input; operating range 8.5V to 30V; requires bias capacitor at least 10 times larger than main switch FET gate capacitance. |
| 8 | VREF | power_in | PWM controller reference voltage output nominally 5V; maximum output current 10mA during normal operation; short-circuit protected at approximately 100mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
UC3842AD8TR - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files:
uc3842ad8tr-etched.step/uc3842ad8tr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);uc3842ad8tr.step/uc3842ad8tr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (54 pp, sha256
a4ea29a77f622a6d, retrieved 2026-09-23, 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: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-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).