Infineon Technologies TLE8251VSJXUMA1

Overview

TLE8251VSJXUMA1 from Infineon is a high-speed CAN transceiver compliant with ISO 11898-2:2003 and ISO 11898-5:2007, serving as the physical layer interface between CAN controllers and automotive HS CAN buses. It supports CAN FD data rates up to 2 MBit/s, features VIO voltage adaptation for microcontroller supply matching, bus wake-up capability with RxD-based wake indication, and operates across extended VCC (4.5–27 V) and VIO (3.0–5.5 V) supply ranges.

For engineers reviewing the TLE8251VSJXUMA1 datasheet, TLE8251VSJXUMA1 pinout, TLE8251VSJXUMA1 application, or TLE8251VSJXUMA1 equivalent, key selection criteria include loop delay symmetry ≤255 ns, CANH/CANL short-circuit protection to ground/battery/VCC, TxD time-out function, low bus leakage current in power-down state (<10 µA), and AEC-Q100 qualification for automotive deployment.

Technical Context

The TLE8251VSJXUMA1 implements dual-receiver architecture: a normal-mode receiver active in normal operation (dominant threshold ≥0.9 V, recessive ≤0.5 V) and a low-power receiver enabled in stand-by mode for bus wake-up detection. Its transmitter uses optimized slew-rate control to minimize EME while maintaining signal integrity for CAN FD frames.

Mode control is managed via STB pin (active-low), enabling seamless transition between normal-operating mode (full TX/RX) and stand-by mode (TX off, normal RX off, low-power RX on). Remote wake-up is signaled by dominant pulse on RxD, filtered to reject noise shorter than defined wake-up window - critical for robustness in electric power steering and body control modules.

Key Specifications

Pinout & Package

Package: PG-DSO-8 (RoHS-compliant, thermally enhanced SOIC-8 with exposed thermal pad).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TJA1044GT/3 and TLE6250G, the TLE8251VSJXUMA1 uniquely combines CAN FD readiness, VIO voltage adaptability, integrated RxD wake indication, and guaranteed loop delay symmetry - making it optimal for next-generation Japanese OEM gateways and EPS systems requiring deterministic low-power operation.

Availability

TLE8251VSJXUMA1 is available at Aetrix Electronics and suitable for Gateway Modules, Body Control Modules (BCMs), and Electric Power Steering (EPS) systems requiring stable component supply, AEC-Q100 compliance, and long-term automotive lifecycle support.

Supply support for TLE8251VSJXUMA1 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 ICs, and security solutions, with global manufacturing and automotive qualification infrastructure.

The TLE8251VSJXUMA1 belongs to Infineon's automotive CAN transceiver product line, engineered specifically for high-reliability, low-emission HS CAN FD networks in Japanese and global OEM platforms - emphasizing ESD robustness, bus wake-up efficiency, and mixed-supply interoperability.

FAQ

What is the purpose of the VIO pin on the TLE8251VSJXUMA1?

The VIO pin supplies the digital interface circuitry (TxD, STB inputs and RxD output) and sets their logic voltage thresholds. It enables direct compatibility with 3.3 V or 5 V microcontrollers without external level shifters, and also powers the low-power receiver during stand-by mode - ensuring wake-up functionality remains active even when VCC is disabled.

How does the TLE8251VSJXUMA1 handle bus wake-up in stand-by mode?

In stand-by mode, the normal transmitter and receiver are disabled, but the low-power receiver remains active on CANH/CANL. When a valid dominant bus signal exceeding duration and amplitude thresholds is detected, the device asserts a dominant pulse on the RxD pin - providing wake-up indication directly to the MCU without requiring additional monitoring circuitry or GPIO interrupts.

Is the TLE8251VSJXUMA1 compatible with CAN FD networks operating above 1 MBit/s?

Yes - the TLE8251VSJXUMA1 is explicitly characterized and guaranteed for CAN FD data rates up to 2 MBit/s, with loop delay symmetry ≤255 ns and optimized slew rates on CANH/CANL. Its design meets VeLIO test requirements for Japanese OEMs, confirming robust operation under high-speed arbitration and data-phase timing constraints.

What protection features prevent damage during automotive electrical transients?

The TLE8251VSJXUMA1 integrates protection against ISO 7637-2 load dump (Pulse 1, 2a, 3a/b), ESD per IEC 61000-4-2 (±8 kV HBM), and CANH/CANL short circuits to battery, ground, and VCC. These features eliminate the need for external TVS diodes or current-limiting resistors in most automotive PCB layouts, reducing component count and board space.