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Infineon Technologies TLE8261-2E
- Part No.:
- TLE8261-2E
- Manufacturer:
- Infineon Technologies
- Category:
- Specialized ICs
- Package:
- 36-BSSOP (0.295", 7.50mm Width) Exposed Pad
- Datasheet:
-
TLE8261-2E.pdf
- Description:
- IC TRANSCEIVER DSO36-38
- Quantity:
- Payment:
- Shipping:
Inventory:4,609
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Product details
Overview
TLE8261-2E from Infineon Technologies is a universal System Basis Chip (SBC) for automotive CAN networks, integrating a high-speed CAN transceiver (ISO 11898-2/5 compliant), three independent 5 V LDO regulators (Vcc1µC/Vcc2/Vcc3), SPI-configurable watchdog/reset supervision, wake-up input, and three open-drain Limp Home outputs. It operates from 5.5 V to 27 V supply, supports -40 °C to +150 °C ambient, and delivers 200 mA per main regulator with ±2% output accuracy.
For engineers reviewing the TLE8261-2E datasheet, TLE8261-2E pinout, TLE8261-2E application, or TLE8261-2E equivalent, this device serves as a complete power management and communication interface solution for body control modules, gateway ECUs, and battery-connected automotive subsystems requiring fail-safe operation, low quiescent current in Stop/Sleep modes (<30 µA), and bus-initiated wake-up capability.
Technical Context
The TLE8261-2E implements a state-machine-driven SBC architecture with dedicated hardware blocks: a HS-CAN transceiver supplied by VccHSCAN, three regulated outputs (Vcc1µC for MCU, Vcc2 for internal CAN cell, Vcc3 configurable up to 400 mA via external PNP), and SPI-controlled supervision logic including window watchdog (16–1024 ms timeout), reset generation, and interrupt management with timing filters.
Its wake-up system supports bi-level-sensitive WK input, cyclic wake in Stop Mode, and bus wake via CAN message detection; all wake sources are individually inhibitable. The Limp Home circuitry provides three independent open-drain outputs with dedicated safety logic, including 1.25 Hz side-indicator and 100 Hz PWM signals, and failsafe activation on undervoltage or thermal fault.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 5.5 V to 27 V - Enables direct connection to automotive battery with load-dump tolerance. |
| Vcc1µC Output | 5 V ±2%, 200 mA - Powers microcontroller and RF receiver with tight regulation for stable digital operation. |
| CAN Data Rate | Up to 1 MBaud - Supports high-speed CAN FD-ready physical layer in legacy CAN networks. |
| Quiescent Current (Sleep) | <30 µA - Enables always-on battery-connected applications without excessive drain. |
| Watchdog Timeout Range | 16 ms to 1024 ms, SPI-configurable - Allows precise system-level timing control for MCU health monitoring. |
| Limp Home Outputs | 3 × open-drain, safety-architected - Provides redundant fail-safe signaling for critical vehicle functions (e.g., hazard lights, brake indicators). |
| ESD Protection (CANH/L/SPLIT) | ±8 kV HBM - Ensures robustness against electrostatic discharge in assembly and field environments. |
| Operating Temperature | -40 °C to +150 °C (ambient) - Qualified for under-hood and transmission-control module placement. |
Pinout & Package
Package: PG-DSO-36-38 (exposed die pad), RoHS-compliant, AEC-Q100 qualified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 RO | Reset Input/Output | Open-drain active-low reset signal with integrated pull-up; asserts reset on Vcc1µC undervoltage or watchdog timeout. |
| 2 CSN | SPI Chip Select | Active-low enable for SPI communication; internal CMOS pull-up ensures safe default high state. |
| 3 SDI | SPI Data Input | Serial data input for configuration and status readback; supports corrupted-data detection logic. |
| 4 CLK | SPI Clock | Master-generated clock synchronizing SPI transfers; max frequency 2 MHz per datasheet. |
| 5 SDO | SPI Data Output | Serial data output for register reads; includes checksum bit for watchdog configuration integrity. |
| 6 Vcc3shunt | Vcc3 Shunt Resistor Terminal | Connects external shunt (e.g., 220 mΩ) to set Vcc3 current limit up to 400 mA for auxiliary CAN transceivers. |
| 7–9 GND | Ground Terminals | Three dedicated ground pins reduce impedance and improve EMC performance in high-noise automotive environments. |
| 10 Vcc1µC | Main MCU Supply Output | 5 V ±2% regulated output delivering 200 mA; includes undervoltage time-out detection (100 ms typical). |
| 11 Vcc3REF | Vcc3 Reference Input | Reference voltage for Vcc3 feedback loop when using external PNP transistor for higher current delivery. |
| 13 Vcc3base | Vcc3 Base Drive | Drives base of external PNP transistor to regulate Vcc3 output up to 400 mA with ±4% accuracy. |
| 16 LH_SI | Limp Home Side Indicator | Open-drain output generating 1.25 Hz, 50% duty cycle square wave for hazard/side-light signaling. |
| 17 WK | Wake-Up Input | Bi-level sensitive input enabling wake from Sleep/Stop mode on rising/falling edge or level change. |
| 18 RxDCAN | CAN Receiver Data | Differential input from CAN_L/CAN_H via internal receiver; compatible with ISO 11898-2/5 common-mode range. |
| 19 TxDCAN | CAN Transmitter Data | CMOS-level output driving internal CAN transmitter; enables full-duplex HS-CAN communication. |
| 20 n.c. | No Connect | Unbonded pin; must be left floating or tied to GND per layout guidelines. |
| 21 INT | Interrupt Output | Open-drain interrupt signal indicating watchdog timeout, reset event, or Limp Home activation. |
| 22 Vs | Main Supply Input | Primary battery input (5.5–27 V); powers internal regulators and CAN transceiver via internal charge pump. |
| 24 Vcc2 | CAN Cell Supply | 5 V ±2%, 200 mA output dedicated to internal HS-CAN transceiver, decoupled from Vcc1µC. |
| 25 TLE8261-2E | Exposed Die Pad | Thermal pad connected to GND internally; requires soldered thermal land for junction temperature control. |
| 26 LH_PL/Test | Limp Home PWM / Test Mode | Open-drain output for 100 Hz, 20% duty cycle PWM; doubles as test pin to inhibit reset during development. |
| 27 CANH | CAN High Output | High-side driver output for differential CAN bus; short-circuit proof to battery and GND. |
| 28 CANL | CAN Low Output | Low-side driver output for differential CAN bus; integrated bus failure detection logic. |
| 29 SPLIT | CAN Common-Mode Stabilization | Connects to external 4.7 kΩ resistor to GND for improved common-mode noise rejection on CAN bus. |
| 30 VccHSCAN | CAN Transceiver Supply | Dedicated 5 V input for HS-CAN cell; isolates CAN power domain from MCU supply for EMC robustness. |
Key Features
| Feature | Design Value |
|---|---|
| Triple Independent LDO Regulators | Vcc1µC (MCU), Vcc2 (CAN cell), and Vcc3 (configurable up to 400 mA) provide isolated, fault-containment power domains. |
| SPI-Configurable Window Watchdog | 16–1024 ms timeout range with checksum-protected configuration enables flexible, software-defined safety monitoring. |
| Bi-Level Wake-Up Input (WK) | Detects both edge and level transitions, supporting multiple wake sources (e.g., door switch, sensor pulse) without external circuitry. |
| Three Safety-Architected Limp Home Outputs | Dedicated logic generates standardized 1.25 Hz side-indicator and 100 Hz PWM signals, plus third configurable output for custom fail-safe behavior. |
| Bus-Failure Detection & Short-Circuit Protection | Monitors CANH/CANL for shorts-to-battery/GND and open circuits; protects against >27 V transients and reverse battery conditions. |
| Green Product Compliance | RoHS-compliant, halogen-free package with AEC-Q100 Grade 1 qualification ensures reliability in automotive production environments. |
Applications
| Body Control Module (BCM) | Gateway ECU |
|---|---|
|
Use Scenario: Centralized control of lighting, wipers, locks, and windows in modern passenger vehicles. IC Role / Device Role / Timing Role: Primary power manager and CAN interface, supplying MCU and external peripherals while relaying messages between CAN domains. Use Value: Integrates three LDOs, HS-CAN, watchdog, and Limp Home outputs-reducing BOM count by 4+ discrete ICs and enabling fail-safe hazard lighting during MCU fault. |
Use Scenario: Communication bridge between powertrain, chassis, and infotainment CAN networks in multi-bus architectures. IC Role / Device Role / Timing Role: HS-CAN transceiver with dedicated VccHSCAN and bus-failure detection ensures deterministic message routing across domains. Use Value: Isolated Vcc2 supply prevents CAN cell disruption during MCU brownout; SPLIT pin stabilization improves inter-network EMC immunity. |
| Seat Control Unit | Roof Module (Sunroof/Windows) |
|
Use Scenario: Motorized seat position memory, heating, and massage functions requiring persistent battery connection and safety monitoring. IC Role / Device Role / Timing Role: Low-quiescent-current SBC maintaining MCU readiness in Sleep Mode; wake-up triggered by LIN or CAN command. Use Value: <30 µA sleep current extends battery life during vehicle off-state; cyclic wake allows periodic self-test without host intervention. |
Use Scenario: Sunroof, power window, and panoramic roof actuation with pinch-detection and anti-trap logic. IC Role / Device Role / Timing Role: Limp Home outputs drive emergency stop indicators and audible alerts during motor stall or overtemperature events. Use Value: Dedicated LH_SI (1.25 Hz) and LH_PL (100 Hz PWM) outputs eliminate need for external timers or MCU GPIO toggling during safety-critical shutdown. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar System Basis Chip applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLE8261E | Single Limp Home output vs. three; identical regulators, CAN, SPI, and watchdog functionality. | Targeted at cost-sensitive modules where only one fail-safe output is required (e.g., simple mirror control). | Select TLE8261E when Limp Home redundancy is unnecessary and PCB space/BOM cost optimization is prioritized. |
| TLE8262-2E | Adds single-wire LIN 2.1 transceiver; retains all TLE8261-2E features including triple Limp Home outputs. | Suitable for hybrid CAN+LIN nodes (e.g., door modules with window lift + mirror controls). | Choose TLE8262-2E when local LIN subnetwork integration is required alongside full CAN gateway capability. |
Compared with TLE8261E, the TLE8261-2E provides triple Limp Home redundancy for enhanced functional safety; versus TLE8262-2E, it removes LIN to reduce complexity and cost in pure CAN-only applications while retaining identical power and supervision architecture.
Availability
TLE8261-2E is available at Aetrix Electronics and suitable for body control modules, gateway ECUs, and seat control units requiring stable component supply, AEC-Q100 compliance, and long-term automotive lifecycle support.
Supply support for TLE8261-2E 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 R&D and manufacturing infrastructure.
The TLE8261-2E belongs to the HERMES System Basis Chip family, designed specifically for automotive electronic control units needing integrated power regulation, HS-CAN communication, and functional safety supervision in harsh environments.
FAQ
What is the maximum allowable input voltage on Vs pin?
The Vs pin accepts 5.5 V to 27 V DC per absolute maximum ratings. It withstands transient load-dump pulses up to 40 V for 400 ms (per ISO 7637-2 Pulse 5a), making it suitable for direct battery connection in 12 V automotive systems without external protection circuitry.
Can Vcc3 be used to power an external CAN transceiver?
Yes - Vcc3 is configurable up to 400 mA using an external PNP transistor and shunt resistor (e.g., 220 mΩ). Its ±4% accuracy and dedicated Vcc3base/Vcc3REF pins allow stable supply to external HS-CAN or LIN transceivers, decoupled from Vcc1µC and Vcc2 domains.
How does the Limp Home output behave during Vcc1µC undervoltage?
Upon Vcc1µC falling below 4.25 V (typical), the Vcc1µC undervoltage time-out triggers after 100 ms (typical), activating all three Limp Home outputs regardless of MCU state. This ensures fail-safe signaling even if the microcontroller has halted or reset.
Is the TLE8261-2E compatible with CAN FD physical layer?
No - the integrated HS-CAN transceiver complies with ISO 11898-2 and ISO 11898-5 (fault-tolerant CAN), supporting up to 1 MBaud, but lacks CAN FD-specific arbitration/non-arbitration bit timing and error handling. It operates in classical CAN mode only.
TLE8261-2E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 36-BSSOP (0.295", 7.50mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Programmable:
- Not Verified
- Type:
- Transceiver
- Applications:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-DSO-36-38
- Grade:
- Automotive
- Qualification:
- -
TLE8261-2E FAQ
1.How can I place an order for TLE8261-2E through Aetrix?
Please submit a Request for Quotation (RFQ) for TLE8261-2E 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 TLE8261-2E reliable?
The price and inventory of TLE8261-2E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE8261-2E is usually 5 days.
3.What payment methods are accepted for TLE8261-2E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE8261-2E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLE8261-2E?
TLE8261-2E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLE8261-2E 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 TLE8261-2E?
For technical support, including TLE8261-2E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE8261-2E requirements.
6.How does Aetrix verify that TLE8261-2E is sourced from the original manufacturer or authorized distributors?
All TLE8261-2E 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 TLE8261-2E meets industry standards.
7.What is the process for return or replacement of TLE8261-2E?
All TLE8261-2E units undergo pre-shipment inspection (PSI). If there is an issue with TLE8261-2E, 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 TLE8261-2E part is unused and in its original packaging.
Return procedure for TLE8261-2E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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