component
SE9018-HF
Public Made by Adomby adom
Seaward Elec Battery Management ICs, ESOP-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
markdownSE9018-HF
Seaward Elec · Battery Management ICs · ESOP-8
SE9018-HF from Seaward Elec, in a ESOP-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 | TEMP | input | Battery NTC temperature sense input; charging pauses when TEMP is below 45% Vcc or above 80% Vcc, and tying TEMP to ground disables this function while the other functions stay normal. |
| 2 | PROG | bidirectional | Constant charge current programming and charge current monitor pin, set by a resistor RPROG to GND (RPROG = 1120/IBAT, ±10%). |
| 3 | GND | power_in | Power ground. |
| 4 | VCC | power_in | Positive input supply voltage; the electrical table gives 4.6 V min, 5 V typ and 7 V max. |
| 5 | BAT | bidirectional | Battery connection pin; the float voltage is 4.2 V typical (4.35 V for the -435 option). |
| 6 | STDBY | output | Charge-complete indicator, open-drain: pulled low internally when charging is complete and high impedance in all other states. |
| 7 | CHRG | output | Charging indicator, open-drain: pulled low internally while charging is in progress and high impedance in all other states. |
| 8 | CE | input | Chip enable input: high level for normal operation, low level stops the chip. |
| 9 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Seaward Elec |
| Package | ESOP-8 |
| Category | Power Management ICs |
| Pins | 9 |
CAD (KiCad official)
- Symbol:
SE9018-HF - Footprint:
Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm - 3D model: ESOP-8 (KiCad packages3D, STEP)
- 3D model files:
se9018-hf-etched.step/se9018-hf-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);se9018-hf.step/se9018-hf.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Seaward Elec datasheet (14 pp, sha256
a433b01eef4429f8, retrieved 2026-10-27, 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 0.3, primaryclaude-sonnet-5-5(text+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).