L9961 STMicroelectronics Integrated Circuit (Quad Flat No-Lead) In Stock
The L9961 is a 5-cell Li-ion battery monitoring and protection IC from STMicroelectronics, housed in a compact QFN package rated to 260°C peak reflow, integrating cell voltage sensing and configurable protection thresholds for automotive and industrial battery pack management.
- Manufacturer
- STMicroelectronics
- Package
- Quad Flat No-Lead
- Pin Count
- 33
- Lifecycle
- ACTIVE
- Datasheet
- L9961 Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.4700(MOQ 500)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of L9961?
- Monitors and protects up to 5 series Li-ion battery cells
- QFN package rated for 260°C peak reflow temperature
- Matte Tin (Sn) annealed terminal finish for reliable SMT soldering
- JESD-609 e3 lead-free compliance marking
- 36-week standard factory lead time for production planning
- Configurable per-cell overvoltage and undervoltage protection thresholds
What is L9961 used for?
The L9961 is well suited for automotive 48V and industrial battery packs, e-bikes, power tools, and stationary energy storage systems that require precise 5-cell Li-ion voltage monitoring and protection. Its QFN package and 260°C reflow rating support reliable surface-mount integration into compact battery management system (BMS) designs.
What are the specifications of L9961?
| Factory Lead Time | 36Weeks |
| YTEOL | 8 |
| Analog IC - Other Type | BATTERY MONITOR/PROTECTOR |
| JESD-609 Code | e3 |
| Peak Reflow Temperature (Cel) | 260 |
| Terminal Finish | Matte Tin (Sn) - annealed |
| Package | Quad Flat No-Lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 3 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Philippines |
Where can I find the L9961 datasheet?
L9961 Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for L9961?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How many Li-ion cells can the L9961 battery monitor manage in a single stack?
The L9961 is designed to monitor and protect up to 5 series Li-ion cells, and its QFN package is rated for a peak reflow temperature of 260°C, ensuring compatibility with standard SMT assembly processes.
What peak reflow temperature rating does the L9961 QFN package support?
The L9961 is qualified for a peak reflow temperature of 260°C in its Quad Flat No-Lead (QFN) package, with a matte tin (Sn) annealed terminal finish that supports standard lead-free SMT assembly processes.
What lead time should buyers plan for when sourcing the L9961?
Buyers should plan for a standard factory lead time of approximately 36 weeks when sourcing the L9961, and the device's 260°C peak reflow rating ensures compatibility with standard lead-free assembly lines during production ramp-up.
Which battery management applications commonly use the L9961?
The L9961 targets 5-cell Li-ion battery pack applications such as e-bikes, power tools, and industrial energy storage systems, leveraging its 260°C-rated QFN package for robust surface-mount assembly in compact BMS designs.
Related Guides
CSD87313DMS Synchronous Buck Power Stage Design Guide
Design a compact CSD87313DMS synchronous buck stage with practical guidance for loss, gate drive, PCB layout, EMI, thermal validation, and sourcing.
Aug 6, 2026
STEF05SGR eFuse Selection Guide for 5 V Overcurrent Protection
Choose STEF05SGR for 5 V overcurrent protection by checking current-limit margin, inrush, thermal loss, fault response, and sourcing.
Aug 6, 2026
C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC
Select C0402C103K3RACTU by voltage margin, X7R behavior, tolerance, 0402 assembly risk, and qualified alternatives.
Aug 4, 2026
STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security
Choose STM32H753VIT6 by evaluating memory architecture, LQFP-100 pin fit, connectivity, security, power, and sourcing tradeoffs.
Aug 4, 2026
Why Buy from FindMyChip
About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 500+ | $1.5900 | $795.00 |
| 1000+ | $1.5100 | $1510.00 |
| 2940+ | $1.4700 | $4321.80 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“The anti-counterfeit verification gave us confidence we'd never had with other China suppliers.”
You May Also Like
ACS770ECB-200U-PFF-T
Allegro Microsystems
Integrated Circuit
ACS770KCB-150U-PFF-T
Allegro Microsystems
Integrated Circuit
MC33901WEF
NXP
Integrated Circuit
MC7808BDTRKG
ON Semiconductor
Integrated Circuit
PA94EC
Apex Microtechnology
Integrated Circuit
AP7315-28SR-7
Diodes Inc.
Integrated Circuit
74HCT245D
Nexperia
Integrated Circuit
CY62256VNLL-70ZXCT
Cypress Semiconductor
Integrated Circuit
EPM7032AETC44-4N
Intel
Integrated Circuit
EPM3512AQC208-10N
Intel
Integrated Circuit
EPM3256ATC144-7N
Intel
Integrated Circuit
EPM3256AQC208-7N
Intel
Integrated Circuit
EPM3256AQC208-10N
Intel
Integrated Circuit
EPM3128ATC100-7N
Intel
Integrated Circuit
EPM1270F256C4N
Intel
Integrated Circuit
EPF8282ATC100-4N
Intel
Integrated Circuit
EPF6016QC208-2N
Intel
Integrated Circuit
EPF6016ATC144-3N
Intel
Integrated Circuit
EPF10K30ATC144-3N
Intel
Integrated Circuit
EPC2TI32N
Intel
Integrated Circuit
EPC2LC20
Intel
Integrated Circuit
EP3SL150F1152C4N
Intel
Integrated Circuit
EP2SGX60DF780C5N
Intel
Integrated Circuit
EP2SGX60CF780C5N
Intel
Integrated Circuit