STMicroelectronics L9965T
the L9965T SPI transceivers allow communication between isolated devices in different voltage domains through a twisted-pair connection. The devices belong to the L9965 chipset family for the monitoring and control of highvoltage battery management systems. The L9965T allow isolated daisy chain connection through a simple two-wire protocol in L9965 based HV BMS applications.| Part No. | L9965T |
|---|---|
| Datasheet | L9965T Download |
| Manufacturer |  STMicroelectronics |
| Description | Automotive SPI to isolated SPI transceiver |
| Buy | Stock & Price |
FEATURES
● AEC-Q100 qualified● Full ISO26262 compliant, ASIL-D systems ready, documentation available
● Temperature grade 1: -40°C to +125°C operating temperature range
● HBM ESD classification level 2
● CDM ESD classification level C4B
● Automatic wake-up of BMS/BMU MCU and PMIC from SHUTDOWN/SLEEP in case of fault detected in the chain
● Single or dual channel p/n in the same package for ring connection
● Supports up to 59 devices in chain
● Cable lengths verified up to 10 meters
● 10 MHz 4-wire SPI interface
● 4 Mbps 2-wire vertical interface (VIF)
● Supports both transformer and capacitive isolation
● Compressed burst data read for enhanced communication speed over the whole chain
● Broadcast write command to configure and control all devices in the chain (or a subset)
● Very low EMI susceptibility and emissions
● Compatible with 3.3 V and 5 V logics
● Supply voltage from 6 V to 24 V
APPLICATIONS
● Automotive battery monitoring systems● Energy storage systems
● UPS
DESCRIPTION
In BMS systems, DS14987 - Rev 3 - July 2026 For further information, contact your local STMicroelectronics sales office.
