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CM1255-ADH-M8A
Public Made by Adomby adom
iCM(创芯微) Battery Management, MSOP-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
markdownCM1255-ADH-M8A
iCM(创芯微) · Battery Management · MSOP-8
CM1255-ADH-M8A from iCM(创芯微), in a MSOP-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 | VCC | power_in | Chip supply terminal, with operating voltage 2.0 V to 25 V relative to VSS and absolute maximum rating VSS-0.3 V to VSS+35 V. |
| 2 | VC1 | passive | Positive voltage connection of cell 1 for cell-voltage sensing; absolute maximum cell voltage range is 0 V to 35 V. |
| 3 | VC2 | passive | Positive voltage connection of cell 2 and negative voltage connection of cell 1 for cell-voltage sensing; absolute maximum cell voltage range is 0 V to 35 V. |
| 4 | VC3 | passive | Positive voltage connection of cell 3 and negative voltage connection of cell 2 for cell-voltage sensing; absolute maximum cell voltage range is 0 V to 35 V. |
| 5 | VC4 | passive | Positive voltage connection of cell 4 and negative voltage connection of cell 3 for cell-voltage sensing; absolute maximum cell voltage range is 0 V to 35 V. |
| 6 | VC5 | passive | Positive voltage connection of cell 5 and negative voltage connection of cell 4 for cell-voltage sensing; absolute maximum cell voltage range is 0 V to 35 V. |
| 7 | VSS | power_in | Negative voltage connection of cell 5 and chip ground terminal; the reference for VCC and CO. |
| 8 | CO | output | Charge-control connection that drives the external charge MOSFET; for the ADH variant it is a CMOS dynamic-H output with high level equal to VCC, absolute maximum VSS-0.3 V to VCC+0.3 V, minimum sink current 0.4 mA and minimum output (source) current 50 µA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | iCM(创芯微) |
| Package | MSOP-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Operating voltage (VCC to VSS) | VOP | 2 | 25 | V | VCC to VSS absolute voltage; Ta=+25°C | 6 | |
| Normal power consumption | IDD_OP | 1.5 | 2.5 | μA | VC1=VC2=VC3=VC4=VC5=3.5V; Ta=+25°C | 6 | |
| Overcharge protection voltage accuracy | VOC | -0.02 | 0.02 | V | Ta=+25°C; VC1=VC2=VC3=VC4=3.5V, VC5=3.5→4.4V. Printed as VOC-0.020 / VOC / VOC+0.020; min/max are offsets from VOC=4.350 V (this MPN, product list) | 6 | |
| Overcharge protection voltage accuracy (wide-temp) | VOC | -0.025 | 0.025 | V | Ta=-20°C~+60°C; VC1=VC2=VC3=VC4=3.5V, VC5=3.5→4.4V. Offsets from VOC=4.350 V (this MPN) | 6 | |
| Hysteresis voltage accuracy (VHC≥0.100V) | VHC | -0.05 | 0.05 | V | Ta=+25°C; VHC≥0.100V branch (applies: this MPN VHC=0.100 V); VC1=VC2=VC3=VC4=3.5V, VC5=4.4→3.5V. Offsets from VHC=0.100 V | 6 | |
| Overcharge protection delay | TOC | 6 | s | Ta=+25°C; VC1=VC2=VC3=VC4=3.5V, VC5=3.5→4.6V. Printed min Toc0.7, max Toc1.3; Toc=6 s for this MPN | 6 | ||
| Recovery delay | TOCR | 6 | 16 | 80 | ms | Ta=+25°C; VC1=VC2=VC3=VC4=3.5V, VC5=4.6→3.5V | 6 |
| Reset delay | TTR | 3 | 6 | 9 | ms | Ta=+25°C (table header) | 6 |
| CO high-level output voltage (VCC option) | VCOH | -0.7 | 0.7 | V | Ta=+25°C; CO high level = VCC for this MPN. Printed VCC-0.7 / VCC / VCC+0.7; min/max are offsets from VCC | 6 | |
| CO sink current | ICOL | 0.4 | mA | Ta=+25°C; CO sink (absorb) current | 6 | ||
| CO output current | ICOH | 50 | μA | Ta=+25°C; CO output current | 6 | ||
| Operating voltage (VCC to VSS) | VOP | 2 | 25 | V | VCC to VSS absolute voltage; Ta=-40°C~+85°C | 7 | |
| Normal power consumption | IDD_OP | 1.5 | 3.5 | μA | VC1=VC2=VC3=VC4=VC5=3.5V; Ta=-40°C~+85°C | 7 | |
| Overcharge protection voltage accuracy | VOC | -0.045 | 0.035 | V | Ta=-40°C~+85°C, row for @Ta=+25°C; VC1=VC2=VC3=VC4=3.5V, VC5=3.5→4.4V. Printed VOC-0.045 / VOC+0.035; offsets from VOC=4.350 V (this MPN) | 7 | |
| Hysteresis voltage accuracy (VHC≥0.100V) | VHC | -0.08 | 0.08 | V | Ta=-40°C~+85°C; VHC≥0.100V branch (applies to this MPN); VC1=VC2=VC3=VC4=3.5V, VC5=4.4→3.5V. Offsets from VHC=0.100 V | 7 | |
| Overcharge protection delay | TOC | 6 | s | Ta=-40°C~+85°C; VC1=VC2=VC3=VC4=3.5V, VC5=3.5→4.6V. Printed min Toc0.5, max Toc1.5; Toc=6 s for this MPN | 7 | ||
| Recovery delay | TOCR | 3 | 16 | 120 | ms | Ta=-40°C~+85°C; VC1=VC2=VC3=VC4=3.5V, VC5=4.6→3.5V | 7 |
| Reset delay | TTR | 1 | 6 | 12 | ms | Ta=-40°C~+85°C | 7 |
| CO high-level output voltage (VCC option) | VCOH | -0.7 | 0.7 | V | Ta=-40°C~+85°C; CO high level = VCC for this MPN. Printed VCC-0.7 / VCC / VCC+0.7; min/max are offsets from VCC | 7 | |
| CO sink current | ICOL | 0.4 | mA | Ta=-40°C~+85°C; CO sink (absorb) current | 7 | ||
| CO output current | ICOH | 50 | μA | Ta=-40°C~+85°C; CO output current | 7 | ||
| Power supply voltage VCC | VCC | -0.3 | 35 | V | Relative to VSS: printed VSS-0.3 ~ VSS+35; min/max are offsets from VSS | 5 | |
| Cell voltage (VC1-VC2 ... VC5-VSS) | VCELL | 0 | 35 | V | Each cell: VC1-VC2, VC2-VC3, VC3-VC4, VC4-VC5, VC5-VSS | 5 | |
| CO output terminal voltage | VCO | -0.3 | 0.3 | V | CO pin; printed VSS-0.3 ~ VCC+0.3; min offset from VSS, max offset from VCC | 5 | |
| Operating ambient temperature | TOPR | -40 | 85 | °C | 5 | ||
| Storage temperature | TSTG | -55 | 125 | °C | 5 |
CAD (KiCad official)
- Symbol:
CM1255-ADH-M8A - Footprint:
Package_SO:MSOP-8_3x3mm_P0.65mm - 3D model: MSOP-8 (KiCad packages3D, STEP)
- 3D model files:
cm1255-adh-m8a-etched.step/cm1255-adh-m8a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);cm1255-adh-m8a.step/cm1255-adh-m8a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: iCM(创芯微) datasheet (16 pp, sha256
206773ab842cb3a0, retrieved 2026-11-10, 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-haiku-5-5(text), consensusclaude-sonnet-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).