Features

• AEC-Q100 qualified

• Full ISO26262 compliant, ASIL-D systems ready

• Compatible with both 3.3 V and 5 V logics

• Supports both XFMR and Capacitive isolation

• 10 MHz SPI peripheral for SPI Slave operation. Configurable SPI frequency

(250 kHz to 8 MHz) for SPI Master operation

• 333 kbps and 2.66 Mbps Vertical InterFace (VIF) for isolated SPI communication

• Low standby current

Description

L9963T is a general purpose SPI to isolated SPI transceiver intended to create a

communication bridge between devices located into different voltage domains.

L9963T is able to transfer communication data incoming from a classical 4-wire

based SPI interface to a 2-wire isolated interface (and viceversa).

The transceiver supports both transformer and capacitive isolation, since the isolated

signal generated according to a proprietary protocol is suitable to be transmitted over

both decoupling circuitries.

The device can be configured either as Slave or as Master of the SPI bus and

supports any protocol made of SPI frames 8 to 64 bit long. The transceiver manages

the transfer of the information without performing any protocol check.

SPI peripheral can work up to 10 MHz when configured as Slave. SPI clock

frequency can be programmed among (250 kHz; 1 MHz; 4 MHz; 8 MHz) when

configured as Master.

Isolated SPI peripheral features two different operating modes: slow @333 kbps and

fast @2.66 Mbps.

The asynchronicity between the two sides is internally managed, allowing all possible

configuration frequencies on both peripherals to be used in application.

L9963T features an internal queue of 3 slots for the frames received on the SPI port

and a queue of 20 slots for the ones received on the isolated SPI side. This allows

buffering and decoupling the two different clock domains.

The device is natively compatible with L9963 isolated SPI, allowing its usage in the

BMS applications.

L9963T is compatible with both 3.3 V and 5 V logics.

Application

• Automotive: 48 V and high-voltage systems

• Backup energy storage systems and UPS

• Industrial communication networks

• Portable and semi-portable equipment

• Remote sensors