Product Overview
The TJA1042 is a high-speed CAN transceiver with Standby mode from NXP Semiconductors, fully compliant with ISO 11898-2 and ISO 11898-5 standards. Optimized for automotive and industrial CAN networks requiring low-power standby with bus wake-up capability, it supports data rates up to 1 Mbit/s and operates from a 4.5 V to 5.5 V supply. A dedicated VIO pin enables direct interface with both 3.3 V and 5 V microcontrollers without external level shifting. The TJA1042 delivers outstanding electromagnetic compatibility performance, achieving excellent EMC at 500 kbit/s even without a common-mode choke. Key features include TXD dominant timeout for fault protection, bus-failure diagnosis capability, under-voltage detection on both supplies, thermal shutdown, and very low standby current with selective wake-up. AEC-Q100 qualified and packaged in a standard SOIC-8 form factor, it is widely used in automotive body modules, gateway ECUs, and low-power CAN nodes where power efficiency and reliable wake-up are essential.
Key Specifications
| Standard Compliance | ISO 11898-2 and ISO 11898-5 |
| Data Rate | Up to 1 Mbit/s |
| Supply Voltage (VCC) | 4.5 V to 5.5 V |
| I/O Supply (VIO) | 3.3 V to 5.5 V |
| Bus Voltage Range | -27 V to +40 V |
| Differential Output (dominant) | 1.5 V to 3.0 V |
| Supply Current (Normal, rec.) | ~17 mA typical |
| Supply Current (Standby) | ~10 µA typical |
| Bus ESD Protection | ±8 kV (HBM) |
| Operating Modes | Normal, Standby |
| Wake-up Detection | Yes (bus wake-up pattern) |
| TXD Dominant Timeout | Yes (prevents stuck dominant) |
| Bus Failure Diagnosis | Yes (open/short detection) |
| Thermal Shutdown | Yes |
| Under-Voltage Detection | Yes (VCC and VIO) |
| I/O Level Compatibility | 3.3 V and 5 V (via VIO) |
| Temperature Range | -40°C to +125°C |
| Qualification | AEC-Q100 Grade 1 |
| Package | SOIC-8 (3.9 mm width) |
Features
- Fully ISO 11898-2 and ISO 11898-5 compliant
- Up to 1 Mbit/s data rate
- Very low standby current with bus wake-up
- Separate VIO pin for 3.3 V / 5 V I/O adaptation
- Excellent EMC performance (no common-mode choke needed @ 500kbit/s)
- TXD dominant time-out function
- Bus failure diagnosis capability
- Thermal shutdown protection
- Bus passive when unpowered (ideal zero load)
- AEC-Q100 qualified (automotive grade 1)
- Wide temperature range: -40°C to +125°C
- SOIC-8 surface mount package
- RoHS compliant, halogen-free / green product
- Automotive body control modules (BCM)
- Automotive gateway control units
- Automotive lighting and comfort systems
- Industrial control and automation networks
- Low-power CAN sensor nodes with wake-up
- Mixed 3.3 V / 5 V CAN systems
- Building automation and HVAC control
- Battery-powered CAN devices
- Automotive infotainment and telematics
- Electric vehicle auxiliary systems
- Marine and off-highway vehicle networks
- Normal mode (STB = LOW): Full transceiver operation (transmit + receive)
- Standby mode (STB = HIGH): Low power, only wake-up receiver active, RXD indicates bus wake-up
- Automotive body control modules (BCM)
- Automotive gateway ECUs
- Automotive lighting and comfort electronics
- Industrial control and factory automation
- Low-power CAN nodes with wake-up
- Mixed 3.3V/5V CAN systems
- Building automation and HVAC
- Battery-powered CAN devices
- Automotive infotainment systems
- Automotive Electronics: All automotive-grade components pass AEC-Q series certification, featuring excellent stability and durability to adapt to complex vehicle operating environments.
- Medical Devices: High-reliability components meet medical industry safety and compliance regulations, ensuring stable operation for medical equipment.
- Industrial Control & Consumer Electronics: Products conform to universal international electronic industry standards, suitable for long-term continuous operation of various equipment.
- Accepted Payment Methods
- T/T (Bank Wire Transfer): The primary settlement method for bulk orders and a widely used international payment channel.
- PayPal: Ideal for small orders, sample orders and quick payments.
Settlement Currency
US Dollar (USD) is the default settlement currency. RMB is available for domestic customers.
Bank Charges
All transfer fees, intermediary bank charges and other remittance-related expenses shall be borne by the buyer.
- Payment Requirements
- Sample and small orders: Shipment will be arranged upon full payment.
- In-stock bulk orders: Goods will be delivered within 2 to 3 working days after full payment.
- Logistics Partners
- International Express: DHL, FedEx, UPS, TNT
- Economy Logistics: Air freight and sea freight for large-volume cargo
- Domestic Delivery: SF Express, Yunda Express
- Order Processing Time
- In-stock items: Orders confirmed and fully paid before 14:00 (GMT+8) will be shipped on the same day. All other orders will be dispatched within 1 to 2 working days.
- Out-of-stock or sourced items: The delivery lead time will be confirmed separately according to brand and inventory status.
- Estimated Transit Time
- International Express: 3 – 7 working days globally
- Air Freight: 7 – 12 working days
- Sea Freight: 25 – 40 working days for heavy and large bulk cargo
- Shipping Fee Rules
- Shipping cost is calculated based on package weight, volume, destination and delivery method.
- Both freight prepaid and freight collect are available. Please provide your courier account number in advance if you choose freight collect.
- Free international express delivery is offered for large orders. Terms for long-term partners can be negotiated separately.
- Shipment Tracking
Within 24 hours after dispatch, we will send the tracking number, commercial invoice, packing list and other documents to your email or communication account. You may check the shipment status online in real time.
MOQ & Sample Service
We support flexible minimum order quantities for samples, small-batch and large-batch orders. All sample orders shall comply with the above shipping and payment policies.
Packaging Standard
All electronic components are packed with professional anti-static and shockproof materials. Original factory packaging is available for branded chips and integrated circuits.
Import Duties & Taxes
All import duties, customs clearance fees and local taxes incurred for international shipments shall be borne by the buyer. We will provide complete customs documents to assist you with clearance procedures.
- Handling of Lost or Damaged Goods
- In case of loss or severe damage during transit, please contact us within 48 hours after receiving the tracking information. We will assist you in filing a claim with the logistics provider.
- We shall not be liable for any losses caused by incorrect delivery address, wrong contact information or the buyer’s refusal to complete customs clearance.
- Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong Province, China
- Business Hours: 09:00 – 18:00, Monday to Friday. Closed on weekends and official public holidays.
- Notice: Please make an appointment via email or communication tools one day in advance, and present your order information upon pickup.
- All components are packed separately to avoid damage caused by friction and collision;
- Shockproof buffer materials are added for fragile products to ensure transportation safety;
- Each package is clearly marked with part number, quantity, batch number and specifications for easy inventory counting and management.
- Anti-static Packaging: Static-sensitive components such as chips, circuit boards and sensors are packaged with anti-static bags, shielding boxes and conductive foam in strict accordance with international anti-static standards to prevent static damage.
- Vacuum Moisture-proof Packaging: Moisture-sensitive components are vacuum-sealed with desiccants to isolate humid air, suitable for ocean transportation and long-term storage.
- Original Factory Packaging: Integrated circuits of brands such as NXP are delivered with original reels, trays or tubes by default, retaining complete original packaging and adapting to automated SMT production lines.
- Discrete Device Packaging: Discrete devices such as SMD resistors, power resistors and LEDs are quantitatively and classifiedly packaged with accurate quantity and clear marking.
- Connector / Aviation Connector Packaging: Hard outer packaging is adopted to prevent pin bending and structural deformation.
Applications
The TJA1042 is a high-speed CAN (Controller Area Network) transceiver from NXP Semiconductors, optimized for mixed-voltage CAN networks in automotive and industrial applications. It provides the interface between a CAN protocol controller and the physical two-wire CAN bus, fully compliant with ISO 11898-2 and ISO 11898-5 standards. Supporting data rates up to 1 Mbit/s, the TJA1042 features a very-low-current Standby mode with bus wake-up functionality and a dedicated VIO pin for direct interface with 3.3 V or 5 V microcontrollers without external level shifters. The device offers exceptional electromagnetic compatibility (EMC) performance even without a common-mode choke at 500 kbit/s. Advanced features include TXD dominant timeout, bus-failure diagnosis, under-voltage detection on both VCC and VIO supplies, and thermal shutdown. Packaged in an SOIC-8 and AEC-Q100 qualified, the TJA1042 is the go-to choice for vehicle body electronics, gateway modules, and low-power CAN nodes requiring wake-up capability.
The TJA1042 functions as the CAN physical layer, translating logic-level signals between the CAN controller and the differential CAN bus. In Normal mode, a low-level TXD input drives the transceiver to pull CANH high and CANL low (dominant state, creating a ~2 V differential voltage), while a high TXD lets both bus lines rest at ~2.5 V (recessive state, near-zero differential voltage). The receiver compares CANH and CANL and outputs the decoded data on RXD. The Standby mode, activated via the STB pin, places the transceiver in a low-power state (~10 µA) where only a low-power receiver monitors the bus; when a wake-up pattern is detected, the RXD pin is pulled low to signal the microcontroller. The VIO pin sets the I/O interface voltage level, enabling direct connection to both 3.3 V and 5 V microcontrollers. The EMC-optimized output stage with controlled slew rates reduces electromagnetic emissions, while the differential receiver with wide common-mode input range provides high noise immunity. The TXD dominant time-out function prevents a stuck-low TXD fault from permanently holding the bus dominant, enhancing system reliability. Bus-failure detection provides diagnostic capabilities for identifying open-circuit, short-to-ground, or short-to-battery conditions.
| Pin No. | Symbol | Type | Description |
|---|---|---|---|
| 1 | TXD | I | Transmit data input (from CAN controller, low = dominant) |
| 2 | GND | P | Ground |
| 3 | VCC | P | Transceiver supply voltage (4.5 V to 5.5 V) |
| 4 | RXD | O | Receive data output (to CAN controller, low = dominant) |
| 5 | VIO | P | I/O supply voltage (3.3 V to 5.5 V for I/O level shifting) |
| 6 | CANL | I/O | CAN bus low-level line |
| 7 | CANH | I/O | CAN bus high-level line |
| 8 | STB | I | Standby mode control (high = standby, low = normal) |
Operating Modes:
| Model | Manufacturer | Key Diff | Description |
|---|---|---|---|
| TJA1040 | NXP | Similar | Older version, similar feature set |
| TJA1044 | NXP | CAN FD | 5 Mbps, CAN FD capable |
| TJA1048 | NXP | Dual | Dual-channel CAN transceiver |
| TJA1145 | NXP | Partial networking | CAN FD with partial networking |
| NCV7342 | onsemi | Standby | onsemi equivalent with standby mode |
| SN65HVD234 | TI | Standby | TI 3.3V CAN with standby |
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Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
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Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
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