1 Features

• AEC-Q100 (Grade 1): Qualified for automotive

applications

• Functional safety-capable

– Documentation available to aid functional safety

system design

• Local interconnect network (LIN) physical layer

specification LIN 2.2A, ISO 17987–4:2016 and

SAE J2602:2021 compliant

• Integrated watchdog supervisor configurable by

pin or serial peripheral interface, SPI

• Enhanced features supporting 12-V applications

– ±58 V LIN bus fault protection

– 3.3 V (TLIN14313-Q1) or 5 V (TLIN14315-Q1)

LDO output supporting 125 mA from 12 V

supply

– High-side switch with open load and short

circuit detection controlled by 10-bit PWM or

timer

– LIMP pin configurable as a high-side switch

– Configurable WAKE pin supporting different

input thresholds or methods

– Sleep mode: ultra-low current consumption

allows wake up event from:

• LIN bus

• Local wake up through WAKE

– Cyclic and static sensing

• Protection Features:

– ESD protection

– Under voltage protection on VSUP and VCC

– TXD dominant time out (DTO) protection

– Thermal shutdown protection

• Integrated battery voltage monitor

• Available in leadless QFN (20) package with

improved automated optical inspection (AOI)

capability

2 Applications

• Body electronics and lighting

• Hybrid, electric and powertrain systems

• Infotainment and cluster

• Appliances

3 Description

The TLIN1431x-Q1 is a local interconnect network

(LIN) system basis chip (SBC) that integrates a

watchdog, high-side switch, limp home capability and

highly configurable WAKE input pin. The device selfdetermines

the control method, pin or serial peripheral

interface (SPI), at power up. The watchdog defaults to

a window watchdog for both control methods but for

flexibility the device can be configured as a window or

timeout watchdog with greater than 20 different time

windows when SPI control is used.

The LIN transceiver provides a 200 kbps fast mode

for end of line programming. A high-side switch with

diagnostic capability is provided for on board LED.

The highly configurable WAKE pin can be used with

the high-side switch for cyclic sensing, thus, reducing

the ECU sleep current. The WKRQ/INH pin can be

configured for a digital wake output (WKRQ) or a

VSUP based inhibit (INH) enable pin for an external

supply.