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Home > Products > Integrated Circuits (ICs) > Interface > Drivers, Receivers, Transceivers

Infineon Technologies TLE8457ASJXUMA1

Name: TLE8457ASJXUMA1
Brand: Infineon Technologies
SKU: TLE8457ASJXUMA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TLE8457ASJXUMA1

Manufacturer:: Infineon Technologies

Category:: Drivers, Receivers, Transceivers

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: TLE8457ASJXUMA1.pdf

Description:: IC TRANSCEIVER 1/1 PGDSO8

Quantity:: RFQ Add To RFQ list

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Product details

Overview

TLE8457ASJXUMA1 from Infineon Technologies is a monolithic automotive-grade LIN transceiver with integrated 5 V/70 mA LDO regulator, compliant with ISO 17987-4 and SAE J2602, featuring ultra-low standby current (20 µA typ), BUS short-to-GND/VBAT protection, and VCC undervoltage reset (NRST). It supplies microcontrollers in battery-backed modules such as window lifters and rain sensors.

For engineers reviewing the TLE8457ASJXUMA1 datasheet, TLE8457ASJXUMA1 pinout, TLE8457ASJXUMA1 application, or TLE8457ASJXUMA1 equivalent, key selection criteria include LIN physical layer compliance, integrated LDO output stability with 1 µF ceramic capacitor, sleep-mode leakage (<16 µA), EN-controlled mode transitions, and AEC-Q100 qualification for permanent battery supply systems.

Technical Context

The device implements a bidirectional LIN physical layer driver with dominant time-out on TxD and automatic initialization watchdog that forces transition to sleep mode upon microcontroller non-response. Its LDO regulator uses bandgap reference and current limitation to deliver stable 5 V ±2% at up to 70 mA with dropout voltage <300 mV at full load.

Operating modes-Normal, Standby, Init, and Sleep-are controlled via EN and TxD pins, with bus wake-up detection triggering RxD low to signal MCU. Overtemperature shutdown disables both LDO and transceiver, and recovery re-enters Init mode. NRST asserts low during VCC undervoltage and reset pulse generation.

Key Specifications

Parameter	Value and Actual Design Meaning
LIN Data Rate	Up to 20 kBit/s - supports full LIN 2.2A timing budgets including sync field, identifier, and checksum fields.
VCC Output Voltage	5.0 V ±2% - regulated output stable with 1 µF ceramic capacitor; powers MCU and peripherals directly.
Standby Current	20 µA typical - enables always-on LIN slave operation without draining vehicle battery.
Sleep Current	≤16 µA max - meets automotive "parked mode" quiescent current requirements per OEM specifications.
ESD Robustness	±8 kV HBM - exceeds IEC61000-4-2 Level 4 for system-level ESD immunity in cabin modules.
Thermal Protection	Overtemperature shutdown - disables LDO and transceiver above junction temperature threshold; auto-recovery into Init mode.
Bus Fault Tolerance	BUS short to VBAT/GND handled - maintains functionality and prevents latch-up during wiring faults.

Pinout & Package

Package: PG-DSO-8 (lead-free, RoHS-compliant, surface-mount SOIC variant with exposed thermal pad not present in this variant).

Pin/Terminal	Circuit Role	Design Meaning
1 VS	Battery supply input	Accepts 5.5–27 V DC; requires local decoupling capacitor to suppress transients per ISO 7637-2.
2 EN	Enable control input	Pull-down internal; logic high selects Normal mode; low enables Standby/Sleep with automatic watchdog.
3 GND	Power ground reference	Common return path for VS, VCC, and BUS; must be low-inductance connection to minimize EMC emissions.
4 BUS	LIN bus interface	Single-wire bidirectional node; integrates slave termination resistor; handles dominant/recessive states per LIN spec.
5 RxD	Receive data output	CMOS-level signal mirroring BUS state; asserts low during bus wake-up to notify MCU in Standby/Init mode.
6 TxD	Transmit data input	CMOS-level input with internal pull-up; driven low by MCU to force dominant bus state; includes time-out protection.
7 NRST	Reset output	Open-drain output pulled high internally; drives low during VCC undervoltage or LDO fault to reset MCU.
8 VCC	LDO regulated output	5 V supply for MCU/peripherals; stable with ≥1 µF X7R ceramic capacitor; current-limited to 70 mA.

Key Features

Feature	Design Value
Integrated LDO regulator	5 V/70 mA output eliminates need for external regulator; reduces BOM count and PCB area in space-constrained modules.
Dominant time-out on TxD	Prevents bus lock-up by disabling transmitter if TxD remains low >15 ms; ensures LIN network integrity during MCU hang.
Initialization watchdog	Forces transition to Sleep mode if MCU fails to respond within timeout after power-up/wake-up; prevents uncontrolled current draw.
VCC undervoltage detection	Generates clean NRST pulse (tRST = 120 ms min) when VCC drops below 4.5 V; synchronizes MCU reset with supply recovery.
Automotive EMC optimization	Low emission and high immunity achieved via slew-rate controlled BUS driver and internal RF filtering; passes CISPR 25 Class 5.

Applications

Window Lifter Module

Rain & Light Sensor

Use Scenario: Motorized window control with position feedback and anti-pinch logic, powered continuously from vehicle battery.

IC Role / Device Role / Timing Role: LIN transceiver interfaces MCU to body control module; LDO powers MCU and Hall sensor; NRST ensures safe reset during voltage dips.

Use Value: Ultra-low standby current (20 µA) avoids battery drain during vehicle parked state; BUS short-circuit tolerance prevents failure from wiring faults.

Use Scenario: Integrated ambient light and rain detection unit mounted behind rearview mirror, requiring reliable wake-on-event behavior.

IC Role / Device Role / Timing Role: LIN node providing sensor data over single-wire bus; RxD wake-up signaling enables fast MCU response to rain/light changes.

Use Value: Init mode auto-entry on bus wake-up ensures deterministic startup; ±8 kV ESD robustness withstands handling and environmental discharge events.

Sun Roof Control

Ambient Lighting Module

Use Scenario: Sliding sun roof with obstacle detection, tilt function, and soft-close logic, operating under variable battery voltage conditions.

IC Role / Device Role / Timing Role: LIN slave transceiver relays commands from BCM; integrated LDO supplies MCU and motor driver IC; EN pin enables mode switching.

Use Value: VCC undervoltage detection (4.5 V threshold) prevents erratic motor behavior during cranking; thermal shutdown protects against enclosure overheating.

Use Scenario: Interior LED lighting with dimming control and color tuning, connected via LIN for centralized brightness management.

IC Role / Device Role / Timing Role: LIN endpoint receiving PWM/dimming commands; LDO powers LED driver and color sensor; BUS pin handles bidirectional diagnostics.

Use Value: Stable 5 V output with 1 µF ceramic capacitor simplifies layout; low EMI design avoids interference with sensitive analog light sensing circuitry.

Equivalent & Alternatives

The following parts are listed as comparable options for similar LIN transceiver with integrated regulator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLIN1029DR	3.3 V LDO output (not 5 V); no integrated VCC undervoltage reset output (NRST)	Requires external reset supervisor for MCU reset coordination; suited for 3.3 V MCU systems only	Select when system uses 3.3 V MCU and external reset management is acceptable
MC33662EKR2	5 V LDO but rated for 100 mA; lacks integrated initialization watchdog and EN-controlled sleep entry	Higher current capability but less autonomous power-state management; requires MCU firmware to handle sleep entry	Select when higher LDO current is needed and MCU can manage mode transitions without hardware watchdog

Compared with TLIN1029DR and MC33662EKR2, the TLE8457ASJXUMA1 uniquely combines 5 V regulation, NRST reset output, hardware-enforced sleep transition via watchdog, and AEC-Q100 qualification in a single PG-DSO-8 package-making it optimal for cost-sensitive, safety-aware LIN slaves requiring zero-firmware power management.

Availability

TLE8457ASJXUMA1 is available at Aetrix Electronics and suitable for window lifter modules, rain/light sensors, sun roof control systems, and ambient lighting requiring stable component supply across automotive production lifecycles.

Supply support for TLE8457ASJXUMA1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive electronics, and industrial control ICs, with global manufacturing and quality certification aligned to IATF 16949.

The TLE8457A belongs to Infineon's Automotive Transceivers product line, engineered specifically for LIN-based body electronics where ultra-low power consumption, fault resilience, and AEC-Q100 reliability are mandatory.

FAQ

What is the minimum VS supply voltage required to maintain VCC regulation?

The TLE8457ASJXUMA1 requires VS ≥ 5.5 V to sustain regulated 5 V output at full 70 mA load. Below 5.5 V, VCC begins to droop; the device enters undervoltage reset when VS falls below the power-on threshold (~4.3 V), asserting NRST low until VS recovers above 4.8 V with hysteresis.

How does the initialization watchdog interact with the EN pin during power-up?

At power-up, the device enters Init mode regardless of EN state. If EN remains low and the MCU fails to drive TxD low within the watchdog timeout (~100 ms), the device transitions autonomously to Sleep mode. Driving EN high during Init mode forces immediate entry into Normal operation, bypassing watchdog enforcement.

Can the BUS pin tolerate reverse battery connection?

No-the BUS pin is not reverse-battery protected. The device relies on external protection (e.g., series diode or TVS) on the VS rail for reverse polarity survival. BUS pin absolute maximum rating is −1 V to +40 V; sustained negative voltage will damage the transceiver stage.

Is the 1 µF output capacitor requirement for the LDO strictly ceramic, or can tantalum be used?

Only X7R/X5R ceramic capacitors are validated for stability; tantalum or aluminum electrolytic capacitors introduce ESR and ESL that destabilize the LDO control loop, risking oscillation or poor transient response. Infineon specifies 1 µF ±20% X7R 0805 or larger with ≤100 mΩ ESR.

TLE8457ASJXUMA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Type:: Transceiver

Protocol:: LINbus

Number of Drivers/Receivers:: 1/1

Duplex:: -

Receiver Hysteresis:: 175 mV

Data Rate:: -

Voltage - Supply:: 5V

Operating Temperature:: -40°C ~ 150°C

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: PG-DSO-8

TLE8457ASJXUMA1 FAQ

1.How can I place an order for TLE8457ASJXUMA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for TLE8457ASJXUMA1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for TLE8457ASJXUMA1 reliable?

The price and inventory of TLE8457ASJXUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE8457ASJXUMA1 is usually 5 days.

3.What payment methods are accepted for TLE8457ASJXUMA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE8457ASJXUMA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TLE8457ASJXUMA1?

TLE8457ASJXUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TLE8457ASJXUMA1 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for TLE8457ASJXUMA1?

For technical support, including TLE8457ASJXUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE8457ASJXUMA1 requirements.

6.How does Aetrix verify that TLE8457ASJXUMA1 is sourced from the original manufacturer or authorized distributors?

All TLE8457ASJXUMA1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TLE8457ASJXUMA1 meets industry standards.

7.What is the process for return or replacement of TLE8457ASJXUMA1?

All TLE8457ASJXUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with TLE8457ASJXUMA1, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The TLE8457ASJXUMA1 part is unused and in its original packaging.

Return procedure for TLE8457ASJXUMA1:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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