Infineon Technologies TLT9255WLCXUMA1

Overview

TLT9255WLCXUMA1 from Infineon is a high-speed CAN transceiver with partial networking and CAN FD tolerance, serving as the physical layer interface between microcontrollers and HS CAN buses in automotive powertrain systems. It supports data rates up to 5 MBit/s (CAN FD), operates across -40°C to +150°C, features ±10 kV ESD robustness per IEC 61000-4-2, and delivers <26 µA quiescent current in Sleep Mode.

For engineers reviewing the TLT9255WLCXUMA1 datasheet, TLT9255WLCXUMA1 pinout, TLT9255WLCXUMA1 application, or TLT9255WLCXUMA1 equivalent, key selection criteria include wake-up pattern filtering (0.5–1.8 µs), SPI-configurable selective wake sub-modes, fail-safe TxD timeout and overtemperature shutdown, and dual-supply operation (VCC/VIO at 3.3 V or 5 V) without mandatory VBAT connection.

Technical Context

The TLT9255WLCXUMA1 implements a differential HS CAN physical layer compliant with ISO 11898-2:2016, featuring advanced bus biasing, CAN short-circuit protection to ground/battery/VCC, and electromagnetic emission (EME) suppression enabling choke-free operation. Its internal protocol handler monitors bus errors and reports overflow, synchronization failure, and CAN timeouts via SPI status registers.

It supports four operational modes-Normal, Receive-only, Stand-by, and Sleep-with two low-power sub-modes: Sleep WUP (wake-up pattern detection) and Selective Wake (29-bit ID + up to 64-bit data matching). All mode transitions, INH output control, undervoltage monitoring (VBAT/VCC/VIO), and wake-up frame filtering are SPI-configurable at up to 4 MHz clock rate.

Key Specifications

Pinout & Package

TLT9255WLCXUMA1 is housed in a RoHS-compliant PG-TSON-14 (3.0 mm × 4.4 mm, 0.65 mm pitch) package with wettable flanks for automated optical inspection.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar HS CAN transceiver applications.

Compared with TJA1044GT/CM and TLE6250G, the TLT9255WLCXUMA1 uniquely combines SPI-driven selective wake, CAN FD tolerance, and AEC-Q100 Grade 0 operation-making it the sole option for new powertrain and EPS designs requiring future-proof partial networking and thermal resilience beyond 125°C.

Availability

TLT9255WLCXUMA1 is available at Aetrix Electronics and suitable for automotive powertrain control, electric power steering, hybrid battery management, and transmission control applications requiring stable component supply across extended temperature and lifetime profiles.

Supply support for TLT9255WLCXUMA1 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 automotive, power management, and security ICs, with vertical integration from silicon wafer fabrication to system-level validation.

The TLT9255WLCXUMA1 belongs to Infineon's automotive-grade HS CAN transceiver family built on Smart Power Technology (SPT), designed specifically for safety-critical, high-temperature ECU interfaces requiring partial networking and CAN FD readiness.

FAQ

Does TLT9255WLCXUMA1 require both VCC and VBAT to operate?

No. The device supports independent supply architecture: VCC powers core logic and drivers, while VBAT enables wake-up functionality during ignition-off states. If VBAT is left unconnected, the transceiver operates fully on VCC in all modes except Sleep-mode wake-up via bus activity-local wake-up (WAKE pin) remains functional.

What is the maximum CAN FD data rate supported, and is it compatible with classical CAN nodes?

The TLT9255WLCXUMA1 supports CAN FD data rates up to 5 MBit/s in HS CAN networks. It is CAN FD tolerant: it can receive and forward FD frames to non-FD MCUs while blocking FD payloads, allowing seamless integration into mixed FD/classical CAN networks without requiring MCU firmware upgrades.

How does the Selective Wake feature reduce false wake-ups in multi-node CAN networks?

Selective Wake uses SPI-programmable 29-bit identifier masks and up to 64-bit data field comparison to validate wake-up frames. Unlike basic WUP detection, it ignores irrelevant traffic (e.g., periodic sensor broadcasts), triggering mode change only for messages matching exact OEM-defined patterns-reducing spurious wake events by >90% in dense network environments.

Can the TLT9255WLCXUMA1 be used without a common-mode choke?

Yes. Its high-symmetry differential driver and optimized EME performance meet CISPR 25 Class 5 radiated emission limits across 150 kHz–108 MHz without external common-mode chokes-verified in Infineon's reference layout. This reduces bill-of-materials cost and PCB area in compact ECU designs.