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NXP Semiconductors TJA1082TT,118
- Part No.:
- TJA1082TT,118
- Manufacturer:
- NXP Semiconductors
- Category:
- Specialized
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TJA1082TT,118.pdf
- Description:
- IC INTERFACE SPECIALIZED 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:6,577
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Product details
Overview
TJA1082TT,118 from NXP Semiconductors is a FlexRay node transceiver compliant with FlexRay Electrical Physical Layer V2.1 Rev. B and supporting key features of V3.0.1. It provides differential transmit/receive capability between FlexRay protocol controllers and the physical bus at 2.5/5/10 Mbit/s, delivers ±8 kV ESD protection on bus pins, supports 14 V and 42 V automotive systems, and enables remote wake-up via bus patterns or dedicated data frames - used in automotive Electronic Control Units (ECUs) for time-triggered communication.
For engineers reviewing the TJA1082TT,118 datasheet, TJA1082TT,118 pinout, TJA1082TT,118 application, or TJA1082TT,118 equivalent, this page delivers verified technical context, real-world power mode behavior, SPI-based diagnostics, fail-silent mechanisms, and validated alternative transceivers for FlexRay network design and ECU integration.
Technical Context
The TJA1082TT,118 implements a dual-receiver architecture: a normal receiver active in Normal mode and a low-power receiver active in Standby mode for wake-up detection. Its transmitter supports DATA_0/DATA_1 encoding with BP/BM differential drive, and includes bus guardian logic via the BGE pin to enforce timing safety.
It integrates dual supply monitoring (VCC and VIO), overtemperature detection, short-circuit protection on BP/BM, and a 16-bit SPI-accessible status register with 11 flags including bus error, TEMP HIGH, TXEN clamped, and UVVCC/UVVIO. Error signaling operates in either SPI mode (latched flag readout) or simple error indication mode (direct ERRN assertion).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data rates | 2.5 Mbit/s, 5 Mbit/s, and 10 Mbit/s - supports full FlexRay bandwidth scalability in automotive networks. |
| Bus voltage range | ±60 V differential between BP/BM and any other pin - ensures robustness against load dump and battery reversal. |
| ESD protection | ±8 kV on BP/BM per IEC61000-4-2 and HBM - eliminates need for external TVS diodes in most ECU designs. |
| Supply voltages | VCC = +5 V; VIO = 2.7 V to 5.5 V - enables auto I/O level adaptation to host controller voltage without level shifters. |
| Wake-up sensitivity | Detects wake-up patterns ≥2 consecutive symbols with DATA_0 > 870 ns and idle > 870 ns - enables reliable low-power bus monitoring. |
| Fail-silent triggers | TXEN clamped if LOW > tdetCL(TXEN); BGE clamped if HIGH > tdetCL(BGE); loss-of-ground forces Power-off mode - prevents erroneous bus driving during fault conditions. |
| AEC-Q100 grade | Grade 1 (−40 °C to +125 °C ambient) - qualified for under-hood automotive ECU deployment. |
Pinout & Package
Packaged in TSSOP14 (SOT402-1), 4.4 mm body width, lead pitch 0.65 mm - compatible with standard automotive PCB assembly processes and space-constrained ECU modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIO (Pin 1) | Input supply reference | Adapts digital I/O levels (TXD, RXD, SDO, etc.) to host controller's VIO voltage - eliminates external level shifters. |
| TXD (Pin 2) | Digital input | Transmit data input with internal pull-down - defines bus state when TXEN is LOW and BGE is HIGH. |
| TXEN (Pin 3) | Digital input | Transmitter enable with internal pull-up - drives transmitter OFF when HIGH; clamping detection prevents stuck-at faults. |
| RXD (Pin 4) | Digital output | Receive data output reflecting bus state (DATA_0 = LOW, DATA_1/idle = HIGH) - directly interfaces FlexRay protocol controller. |
| BGE (Pin 5) | Digital input | Bus guardian enable with internal pull-down - disables transmitter when LOW; clamping detection enforces safe bus access control. |
| STBN (Pin 6) | Digital input | Mode control: HIGH = Normal mode (full TX/RX), LOW = Standby (low-power wake-up monitoring) - determines power state after power-up. |
| SCLK (Pin 7) | SPI clock input | Accepts 10 kbit/s to 2 Mbit/s SPI clock - enables microcontroller to read 16-bit status register for diagnostics. |
| SDO (Pin 8) | SPI data output | Active-HIGH serial output of status bits S0–S15 - provides real-time visibility into bus error, temperature, undervoltage, and wake-up events. |
| SCSN (Pin 9) | SPI chip select | LOW enables SPI readout; held LOW+HIGH on SCLK configures simple error indication mode - dual-mode diagnostic interface. |
| ERRN (Pin 10) | Open-drain output | Active-LOW error/wake-up indicator - asserts for bus error, TEMP HIGH, UVVCC/UVVIO, or wake-up event; polarity matches automotive fault signaling standards. |
| GND (Pin 11) | Power ground | Reference for all analog and digital circuitry - isolated return path prevents noise coupling into sensitive bus receivers. |
| BM (Pin 12) | Bus I/O | FlexRay bus line minus - differential pair with BP; short-circuit proof to battery (14 V/42 V) and GND; remains passive when unpowered. |
| BP (Pin 13) | Bus I/O | FlexRay bus line plus - differential pair with BM; ±60 V absolute max rating; ESD-protected; floats when VCC = 0. |
| VCC (Pin 14) | Power supply | +5 V main supply with undervoltage detection - powers analog transceiver core and digital interface; POR threshold at Vth(rec)POR ≈ 4.2 V. |
Key Features
| Feature | Design Value |
|---|---|
| FlexRay V2.1 Rev. B compliance + V3.0.1 extensions | Meets ISO 17458-4 physical layer requirements and supports enhanced wake-up and bus error handling defined in V3.0.1. |
| Dual-receiver architecture (Normal + Low-power) | Enables continuous bus monitoring in Standby mode while consuming <100 µA - critical for always-on ECU wake-up readiness. |
| Auto I/O level adaptation to VIO | Eliminates external level-shifting components for TXD/RXD/SDO/ERRN - simplifies interface to 3.3 V or 5 V microcontrollers. |
| Instant shut-down via BGE pin | Disables transmitter within nanoseconds when BGE driven LOW - enforces deterministic bus arbitration and fault containment. |
| 16-bit SPI status register with 11 flags | Provides granular visibility into bus error, temperature, supply faults, and wake-up status - enables predictive maintenance and root-cause analysis. |
| Fail-silent behavior enforcement | Automatically disables transmitter on TXEN clamp, overtemperature, or bus short-circuit - prevents corruption of time-triggered FlexRay network timing. |
Applications
| Advanced Driver Assistance Systems (ADAS) | Powertrain Control Unit (PCU) |
|---|---|
|
Use Scenario: Real-time sensor fusion and actuator coordination among radar, camera, and brake control ECUs in autonomous emergency braking systems. IC Role / Device Role / Timing Role: FlexRay node transceiver providing deterministic, low-latency, fault-tolerant communication between distributed ADAS nodes. Use Value: Enables synchronized sampling and command execution across multiple ECUs with sub-microsecond jitter - meeting ASIL-D timing integrity requirements. |
Use Scenario: Coordinating engine torque management, transmission shifting, and exhaust aftertreatment in gasoline/diesel powertrains. IC Role / Device Role / Timing Role: Physical layer interface linking powertrain master controller to slave actuators and sensors over FlexRay backbone. Use Value: Delivers 10 Mbit/s throughput and ±8 kV ESD immunity required for under-hood deployment near ignition systems and alternators. |
| Electric Vehicle Battery Management System (BMS) | Chassis Domain Controller |
|
Use Scenario: High-voltage battery cell monitoring and thermal management coordination across modular battery packs. IC Role / Device Role / Timing Role: Robust FlexRay transceiver connecting BMS master to distributed slave modules on high-noise 42 V vehicle architectures. Use Value: Supports 42 V system operation and ±60 V bus differential tolerance - withstands transients during regenerative braking and contactor switching. |
Use Scenario: Integrating steering angle, yaw rate, wheel speed, and suspension control signals for electronic stability control (ESC) and active roll mitigation. IC Role / Device Role / Timing Role: Time-triggered communication node ensuring deterministic latency and jitter-free signal exchange across chassis subsystems. Use Value: Provides fail-silent behavior and bus short-circuit protection - prevents erroneous actuation during electrical faults in safety-critical chassis functions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar FlexRay transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TJA1083TT,118 | Includes integrated bus guardian logic and supports FlexRay V3.0.1 fully; adds programmable wake-up filter and extended diagnostic coverage. | Required where bus guardian functionality must be embedded in transceiver rather than implemented externally; suited for new V3.0.1-compliant designs. | Select TJA1083TT,118 when full V3.0.1 conformance and integrated bus guardian are mandatory; TJA1082TT,118 remains optimal for cost-sensitive V2.1-based ECUs. |
| MC33664AEFR2 | Freescale/NXP legacy part; supports only up to 5 Mbit/s; lacks SPI status register and low-power receiver; no V3.0.1 support. | Limited to legacy FlexRay networks with lower bandwidth and simpler diagnostics; not suitable for 10 Mbit/s or wake-up pattern detection. | Choose MC33664AEFR2 only for drop-in replacement in existing designs using older FlexRay infrastructure; not recommended for new development. |
Compared with TJA1082TT,118, the TJA1083TT,118 adds integrated bus guardian and deeper V3.0.1 support but increases system cost, while the MC33664AEFR2 sacrifices 10 Mbit/s capability, SPI diagnostics, and modern wake-up features - making TJA1082TT,118 the balanced choice for V2.1-compliant, production-ready automotive FlexRay nodes.
Availability
TJA1082TT,118 is available at Aetrix Electronics and suitable for Advanced Driver Assistance Systems (ADAS), Powertrain Control Units (PCU), and Electric Vehicle Battery Management Systems (BMS) requiring stable component supply, long-term automotive qualification, and AEC-Q100 Grade 1 reliability.
Supply support for TJA1082TT,118 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
NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in automotive networking and functional safety.
The TJA1082TT,118 belongs to NXP's FlexRay transceiver product line, designed specifically for time-triggered, fault-tolerant communication in safety-critical automotive ECUs - emphasizing EMC robustness, diagnostic completeness, and seamless integration with protocol controllers.
FAQ
What is the primary compliance standard met by the TJA1082TT,118?
The TJA1082TT,118 is compliant with the FlexRay Electrical Physical Layer specification V2.1 Rev. B and incorporates selected features from V3.0.1. It also meets AEC-Q100 Grade 1 qualification for automotive use, supports ISO 7637-2 Class C transient immunity, and provides ±8 kV ESD protection per IEC61000-4-2. These certifications ensure suitability for under-hood deployment in production vehicles.
How does the TJA1082TT,118 handle wake-up from Standby mode?
The TJA1082TT,118 supports two wake-up methods in Standby mode: (1) bus wake-up via a valid pattern of ≥2 consecutive wake-up symbols (DATA_0 > 870 ns + idle > 870 ns), and (2) wake-up via dedicated FlexRay data frames emulating that pattern. Upon detection, the wake flag sets, ERRN goes LOW, and the transceiver transitions to Normal mode - enabling rapid, deterministic ECU activation without microcontroller polling.
What diagnostic capabilities does the TJA1082TT,118 provide through its SPI interface?
The TJA1082TT,118 features a 16-bit SPI-accessible status register containing 11 flags - including bus error, TEMP HIGH, TXEN clamped, UVVCC, UVVIO, and SPI error. In SPI mode, these flags are latched and cleared only upon successful 16-bit readout. This allows microcontrollers to perform precise root-cause analysis of faults without missing transient events - a key advantage over simple ERRN assertion alone.
Can the TJA1082TT,118 operate in both 14 V and 42 V automotive electrical systems?
Yes, the TJA1082TT,118 is explicitly designed for dual-voltage compatibility: its bus pins (BP/BM) are short-circuit proof to both 14 V and 42 V battery rails and ground, and it tolerates ±60 V differential voltage. This makes it suitable for conventional 12 V/14 V systems as well as 36 V/42 V architectures used in electric powertrains and high-power ADAS domains - without external protection circuitry.
What fail-silent mechanisms are implemented in the TJA1082TT,118 to ensure network safety?
The TJA1082TT,118 enforces fail-silent behavior through three independent mechanisms: (1) TXEN clamping disables the transmitter if TXEN remains LOW beyond tdetCL(TXEN); (2) overtemperature detection disables transmission when junction temperature exceeds Tj(dis)(high); and (3) loss-of-ground forces Power-off mode, preventing reverse current flow from digital inputs. These ensure the bus remains uncontaminated during ECU-level faults.
TJA1082TT,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- -
- Interface:
- FlexRay
- Voltage - Supply:
- 4.75V ~ 5.25V
- Supplier Device Package:
- 14-TSSOP
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
TJA1082TT,118 FAQ
1.How can I place an order for TJA1082TT,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for TJA1082TT,118 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 TJA1082TT,118 reliable?
The price and inventory of TJA1082TT,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TJA1082TT,118 is usually 5 days.
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Once your TJA1082TT,118 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 TJA1082TT,118?
For technical support, including TJA1082TT,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TJA1082TT,118 requirements.
6.How does Aetrix verify that TJA1082TT,118 is sourced from the original manufacturer or authorized distributors?
All TJA1082TT,118 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 TJA1082TT,118 meets industry standards.
7.What is the process for return or replacement of TJA1082TT,118?
All TJA1082TT,118 units undergo pre-shipment inspection (PSI). If there is an issue with TJA1082TT,118, 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 TJA1082TT,118 part is unused and in its original packaging.
Return procedure for TJA1082TT,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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