Product
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TLIN1431-Q1
  • TLIN1431-Q1
  • TLIN1431-Q1
  • TLIN1431-Q1
  • TLIN1431-Q1
  • TLIN1431-Q1

TLIN1431-Q1

ACTIVE

Automotive LIN SBC for 12-V systems with integrated VREG and watchdog

Texas Instruments TLIN1431-Q1 Product Info

1 April 2026 2

Parameters

Type

Mid-range

Protocols

LIN

Number of channels

1

Signaling rate (max) (Mbps)

0.2

Supply voltage (V)

5.5 to 28

Bus fault voltage (V)

-58 to 58

Iout (max) (mA)

125

Regulated outputs (#)

1

Step-down DC/DC converter

0

LDO

1

LDO Vout (typ) (V)

3.3, 5

Watchdog type

Integrated, Timeout, Window

Low-power mode

Selective Wake, Sleep

Rating

Automotive

Package

VQFN (RGY)-20-15.75 mm² 4.5 x 3.5

Features

  • AEC-Q100 (Grade 1): Qualified for automotive applications
  • Functional safety-capable
  • 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
  • AEC-Q100 (Grade 1): Qualified for automotive applications
  • Functional safety-capable
  • 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

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 self-determines 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.

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