component
UC3842AN
Public Made by Adomby adom
XBLW AC-DC Controllers And Regulators, DIP-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
markdownUC3842AN
XBLW · AC-DC Controllers And Regulators · DIP-8
UC3842AN from XBLW, in a DIP-8. 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 | COMP | output | Error amplifier compensation pin; connect external compensation components to modify the error amplifier output. |
| 2 | VFB | input | Inverting input to the internal error amplifier, used to control the power converter voltage-feedback loop for stability. |
| 3 | ISENSE | input | Primary-side current sense pin; connect to the current sensing resistor, the PWM uses this signal to terminate the OUTPUT switch conduction. |
| 4 | RT/CT | passive | Connect timing resistor RRT to VREF and timing capacitor CCT to GROUND to set the switching frequency and maximum output ratio; maximum frequency up to 500kHz. |
| 5 | GND | power_in | Ground. |
| 6 | OUTPUT | output | Gate drive for the external MOSFET; peak currents of up to 1 A are sourced and sunk by this pin. |
| 7 | VCC | power_in | Power supply pin; provides power to the device. |
| 8 | VREF | power_out | Reference voltage output used to provide charging current to the oscillator timing capacitor through the timing resistor. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | XBLW |
| Package | DIP-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
UC3842AN - Footprint:
Package_DIP:DIP-8_W7.62mm - 3D model: DIP-8 (KiCad packages3D, STEP)
- 3D model files:
uc3842an-etched.step/uc3842an-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);uc3842an.step/uc3842an.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: XBLW datasheet (12 pp, sha256
35c0919c953ebbf6, retrieved 2026-10-18, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(vision), consensusclaude-opus-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).