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FEATURES

RXD

NWake

TXD

INH

SUP

LIN

GND

D PACKAGE

(TOP VIEW)

DESCRIPTION

TPIC1021

LIN Physical Interface

SLIS113C – OCTOBER 2004 – REVISED JULY 2005

• Dominant State Timeout Protection on TXD

• LIN Physical Layer Specification Revision 2.0

compliant. Conforms to SAEJ2602 • Wake-Up Request on RXD Pin

Recommended Practice for LIN

• Control of External Voltage Regulator (INH

• LIN Bus Speed up to 20 kbps Pin)

• ESD Protection to 12 kV (Human Body Model) • Integrated Pull-Up Resistor and Series Diode

on LIN Pin for LIN Slave Applications

• LIN Pin Handles Voltage from -40 V to +40 V • Low EME (Electromagnetic Emissions), High

EMI (Electromagnetic Immunity)

• Survives Transient Damage in Automotive

Environment (ISO 7637) • Bus Terminal Short-Circuit Protected for

Short to Battery or Short to Ground

• Operation with Supply from 7 V to 27 V DC

• Thermally Protected

• Two Operation Modes: Normal and Low

Power (Sleep) Mode • Ground Disconnection Fail Safe at System

Level

• Low Current Consumption in Low Power

Mode • Ground Shift Operation at System Level

• Wake-Up Available from LIN Bus, Wake-Up • Unpowered Node Does Not Disturb the

Input (External Switch) or Host MCU Network

• Interfaces to MCU with 5 V or 3.3 V I/O Pins

The TPIC1021 is the LIN (Local Interconnect Network) physical interface, which integrates the serial transceiver

with wake up and protection features. The LIN bus is a single wire, bi-directional bus typically used for low-speed

in-vehicle networks using baud rates between 2.4 kbps and 20 kbps.

The LIN bus has two logical values: the dominant state (voltage near ground) represents a logic ‘0’ and the

recessive state (voltage near battery) and represents logic ‘1’.

In the recessive state the LIN bus is pulled high by the TPIC1021’s internal pull-up resistor (30k Ω ) and series

diode, so no external pull-up components are required for slave applications. Master applications require an

external pull-up resistor (1k Ω ) plus a series diode.

The LIN Protocol output data stream on the TXD pin is converted by the TPIC1021 into the LIN bus signal

through a current limited, wave-shaping low-side driver with control as outlined by the LIN Physical Layer

Specification Revision 2.0. The receiver converts the data stream from the LIN bus and outputs the data stream

via the RXD pin.

In Low Power mode, the TPIC1021 requires very low quiescent current even though the wake-up circuits remain

active allowing for remote wake up via the LIN bus or local wake ups via NWake or EN pins.

The TPIC1021 has been designed for operation in the harsh automotive environment. The device can handle LIN

bus voltage swing from +40 V down to ground and survive -40 V. The device also prevents back feed current

through the LIN pin to the supply input in case of a ground shift or supply voltage disconnection. It also features

under-voltage, over temperature, and loss of ground protection. In the event of a fault condition the output is

immediately switched off and remains off until the fault condition is removed.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (18 pages)

PAGE 1
TPIC1021 LIN Physical Interface www.ti.com SLIS113C – OCTOBER 2004 – REVISED JULY 2005 • FEATURES • • • • • • • • • • LIN Physical Layer Specification Revision 2.0 compliant.
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TPIC1021 LIN Physical Interface www.ti.com SLIS113C – OCTOBER 2004 – REVISED JULY 2005 TERMINAL FUNCTIONS Terminal Assignments PIN NO.
PAGE 3
www.ti.com TPIC1021 LIN Physical Interface SLIS113C – OCTOBER 2004 – REVISED JULY 2005 RXD Wake-up Request When the TPIC1021 has been in low power mode and encounters a wake-up event from the LIN bus or NWake pin the RXD pin will go LOW while the device enters and remains in Standby Mode (until EN is re-asserted high and the device enters Normal Mode). Supply Voltage (VSUP) The TPIC1021 device power supply pin. This pin is connected to the battery through an external reverse battery blocking diode.
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TPIC1021 LIN Physical Interface www.ti.
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TPIC1021 LIN Physical Interface www.ti.com SLIS113C – OCTOBER 2004 – REVISED JULY 2005 OPERATING STATES (continued) Operating Modes MODE EN RXD LIN BUS TERMINATION INH TRANSMITTER Low Power 0 Floating High impedance High impedance Off Standby 0 Low 30 kΩ (typical) High Off Normal 1 LIN bus data 30 kΩ (typical) High On COMMENTS Wake-up event detected, waiting on MCU to set EN Normal Mode This is the normal operational mode where the receiver and driver are active.
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TPIC1021 LIN Physical Interface www.ti.com SLIS113C – OCTOBER 2004 – REVISED JULY 2005 LIN tLINBUS VSUP INH High Impedance EN System Wake−Up Time (Vreg + MCU) RXD MODE Floating Low Power Standby Normal Figure 2. Wake-Up Via LIN Bus Timing Diagram Falling Edge on NWake NWake tNWake VSUP INH High Impedance EN System Wake−Up Time (Vreg + MCU) RXD MODE Floating Low Power Standby Figure 3.
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TPIC1021 LIN Physical Interface www.ti.com SLIS113C – OCTOBER 2004 – REVISED JULY 2005 ABSOLUTE MAXIMUM RATINGS (1) over operating free-air temperature range (unless otherwise noted) PARAMETER VSUP (2) RATING UNIT Supply line supply voltage (continuous) 0 to 27 V Supply line supply voltage (transient) 0 to 40 V NWake DC and transient input voltage (through 33-kΩ serial resistor) -1 to 40 V Logic pin input voltage (RXD, TXD, EN) -0.3 to 5.
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TPIC1021 LIN Physical Interface www.ti.com SLIS113C – OCTOBER 2004 – REVISED JULY 2005 ELECTRICAL CHARACTERISTICS VSUP = 7 V to 27 V, TA = -40°C to 125°C (unless otherwise noted) PARAMETER MIN TYP (1) MAX 7 14 27 V 14 18 V 1.2 2.5 mA 1 2.
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TPIC1021 LIN Physical Interface www.ti.
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TPIC1021 LIN Physical Interface www.ti.
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TPIC1021 LIN Physical Interface www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE MATERIALS INFORMATION www.ti.com 14-Mar-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant TPIC1021DR SOIC D 8 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.0 Q1 TPIC1021DR SOIC D 8 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.0 Q1 TPIC1021DRG4 SOIC D 8 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 14-Mar-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TPIC1021DR SOIC D 8 2500 367.0 367.0 35.0 TPIC1021DR SOIC D 8 2500 367.0 367.0 35.0 TPIC1021DRG4 SOIC D 8 2500 367.0 367.0 35.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.