Infineon Technologies TLE9251VLEXUMA1

Overview

TLE9251VLEXUMA1 from Infineon is a high-speed CAN transceiver compliant with ISO 11898-2:2016 and SAE J2284-4/-5, serving as the physical layer interface between HS CAN protocol controllers and automotive bus networks. It supports CAN FD data frames up to 5 MBit/s, features VIO voltage adaptation (3.3 V or 5 V), and delivers <10 µA quiescent current in Stand-by mode. Used in body control modules and gateway units where ESD robustness (+/-11 kV IEC 61000-4-2) and loop delay symmetry are critical.

For engineers reviewing the TLE9251VLEXUMA1 datasheet, TLE9251VLEXUMA1 pinout, TLE9251VLEXUMA1 application, or TLE9251VLEXUMA1 equivalent, key selection criteria include guaranteed delay symmetry for CAN FD timing integrity, bus wake-up pattern filtering (0.5–1.8 µs), fail-safe TxD time-out, overtemperature protection (170–190 °C shutdown), and PG-TSON-8 package compatibility with AOI inspection.

Technical Context

The TLE9251VLEXUMA1 implements dual-receiver architecture-Normal-mode and Low-power Receiver-with automatic mode switching via STB pin control. Its transmitter uses symmetrical drive circuitry to minimize differential skew, enabling reliable 5 MBit/s CAN FD operation under parasitic network conditions.

Bus biasing is internally managed; CANH/CANL outputs remain high-impedance during power-down, presenting near-zero load to the network. Wake-up logic filters bus activity through a configurable 0.5–1.8 µs window to suppress noise while detecting valid WUP patterns across global OEM specifications.

Key Specifications

Pinout & Package

Package: PG-TSON-8 (leadless, 3 mm × 3 mm, 0.65 mm pitch), RoHS-compliant and halogen-free, optimized for automated optical inspection (AOI) and high-density PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed CAN transceiver applications.

Compared with TJA1044T and TLE6250G, the TLE9251VLEXUMA1 uniquely combines CAN FD readiness, dual-supply adaptability (VIO), and globally certified wake-up filtering - making it the only option among the three qualified for new-generation automotive gateways requiring 5 MBit/s and AEC-Q100 Grade 0 operation.

Availability

TLE9251VLEXUMA1 is available at Aetrix Electronics and suitable for gateway modules, body control modules, and engine control units requiring stable component supply, automotive-grade traceability, and long-term lifecycle support.

Supply support for TLE9251VLEXUMA1 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 security solutions, with core expertise in high-reliability analog and mixed-signal ICs.

The TLE9251VLEXUMA1 belongs to Infineon's automotive transceiver product line, engineered specifically for HS CAN networks in safety-critical vehicle domains requiring AEC-Q100 qualification, ESD resilience, and CAN FD timing precision.

FAQ

What is the function of the STB pin on the TLE9251VLEXUMA1?

The STB (Stand-by) pin is an active-low control input that selects operating mode: logic low enables Normal-operating mode with full transmit/receive capability, while logic high places the device in Stand-by mode. In Stand-by, VCC may be turned off to reduce quiescent current, and the low-power receiver remains active to detect bus wake-up patterns with configurable 0.5–1.8 µs filtering.

Does the TLE9251VLEXUMA1 support CAN FD at full 5 MBit/s in all configurations?

Yes - the TLE9251VLEXUMA1 guarantees loop delay symmetry and signal integrity up to 5 MBit/s under defined conditions: proper PCB layout (controlled impedance, matched trace lengths), termination (120 Ω), and supply decoupling (100 nF per VCC/VIO). Performance is validated per ISO 11898-2:2016 Annex C test methods and confirmed in Infineon's interoperability test reports.

How does the VIO pin affect logic-level compatibility?

The VIO pin supplies the digital interface section and sets the voltage threshold for TxD input and RxD output. With VIO = 3.3 V, the transceiver interfaces directly with 3.3 V microcontrollers; with VIO = 5 V, it matches 5 V logic families. Internal pull-ups on TxD and STB reference VIO, eliminating external resistors and simplifying mixed-voltage system design.

Is thermal pad connection mandatory for the PG-TSON-8 package?

Yes - the exposed thermal pad (Pin 9, labeled PAD in datasheet) must be soldered to a dedicated PCB copper pour connected to GND. This connection is essential for achieving the specified R_thJA of 65 K/W and sustaining 150 °C maximum junction temperature under continuous 5 MBit/s operation. Leaving the pad unconnected degrades thermal performance and risks premature thermal shutdown.