TCAN843-Q1 - 5Mbps CAN FD Transceiver Sleep | TI
MPN: TCAN843-Q1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.1 | $2.10 |
| 10 | $1.9 | $19.00 |
| 100 | $1.55 | $155.00 |
| 500 | $1.3 | $650.00 |
| 1,000 | $1.05 | $1,050.00 |
TCAN843-Q1 Overview
A CAN transceiver is the physical-layer interface between a CAN controller in a microcontroller and the differential twisted-pair bus. It converts logic-level TXD/RXD signals into differential CANH/CANL signals, providing the drive strength, fault tolerance, and noise immunity required in harsh automotive and industrial environments.
Key features include 5 Mbps CAN FD support, four operating modes (normal, silent, standby, and low-power sleep), and a VIN pin tied to the microcontroller I/O supply that supports a 3.3V to 5.5V logic range. The INH output pin enables system-level battery-current reduction by selectively gating power supplies, allowing a low-current sleep state while the transceiver monitors the bus for wake-up frames.
Protection features include thermal shutdown (TSD), TXD-dominant time-out (TXD DTO), load-dump support on VSUP, undervoltage protection, and CAN bus fault tolerance in 12V and 24V systems. The robust bus interface with high ESD tolerance ensures reliable operation in body electronics, gateways, and battery management systems.
Typical applications include body control modules, gateway modules, battery management systems, and industrial transportation networks where always-on nodes must minimize quiescent battery drain while maintaining network responsiveness.
When designing with the TCAN843-Q1, use proper 120-ohm bus termination, place the transceiver close to the connector to minimize stub length, and connect VIN to the microcontroller I/O supply to set the digital interface logic level.
Drop-in alternatives for TCAN843-Q1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TCAN1043A-Q1
✅ Drop-In📋 Reference alternative (not in catalog)
TCAN1043N-Q1
✅ Drop-In📋 Reference alternative (not in catalog)
TJA1462AT/118
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TCAN843-Q1 Specifications
| Interface Standard | ISO 11898-2:2024 high-speed CAN |
| Protocol Support | Classical CAN and CAN FD |
| Maximum Data Rate | 5 Mbps |
| Operating Modes | Normal, silent, standby, sleep |
| Logic Supply Range (VIN) | 3.3 V to 5.5 V |
| Package Options | 14-pin SOIC (D), SOT, VSON |
| Package Feature | Wettable flanks for AOI |
| Wake-up Function | CAN bus wake-up with INH power gating |
| Protection Features | Thermal shutdown, TXD dominant time-out, undervoltage protection |
| Load-Dump Support | Yes on VSUP |
| Automotive Qualification | AEC-Q100 qualified (Q1) |
| Mounting Type | Surface Mount |
| Number of Transceivers | 1 |
| Duplex | Half |
| Application Domains | Automotive body, gateway, BMS; industrial transportation |
| RoHS Status | Compliant |
TCAN843-Q1 Pin Configuration
| Pin 1 | TXD — Transmit data input from CAN controller (logic level set by VIN) |
| Pin 2 | GND — Ground reference |
| Pin 3 | VCC — Transceiver core supply |
| Pin 4 | RXD — Receive data output to CAN controller |
| Pin 5 | VIO/VIN — I/O logic supply, 3.3V to 5.5V, sets digital logic level |
| Pin 6 | EN/STB — Mode select / standby control |
| Pin 7 | nSLEEP / WAKE — Sleep control / wake-up input |
| Pin 8 | INH — Inhibit output for system power gating in sleep |
| Pin 9 | nFAULT — Fault indicator output |
| Pin 10 | NC — No connect |
| Pin 11 | CANL — CAN low bus line |
| Pin 12 | CANH — CAN high bus line |
| Pin 13 | VSUP — Battery supply input with load-dump support |
| Pin 14 | GND — Ground reference |
Typical Applications
TCAN843-Q1 is suitable for 6 applications: Body Control Module (BCM), Automotive Gateway Modules, Battery Management Systems (BMS), Industrial Transportation Networks, On-Board Charger and Powertrain ECUs, OBD and Diagnostic Interfaces.
Body Control Module (BCM)
Body control modules aggregate lighting, door, and seat functions over high-speed CAN. The TCAN843-Q1 fits because its 5 Mbps CAN FD support shortens frame transmission time, and its sleep mode plus INH power gating cuts quiescent battery draw in parked vehicles, extending no-load battery life. VIN tied to the 3.3V MCU I/O rail simplifies interface design. Protection against TXD-dominant faults and bus shorts keeps the always-on node robust in 12V automotive electrical environments.
Recommended
Automotive Gateway Modules
Gateway modules bridge multiple CAN/CAN FD and Ethernet domains. The TCAN843-Q1's conformance to ISO 11898-2:2024 and 5 Mbps CAN FD provides headroom for modern 500 kbps-5 Mbps segments, while silent mode supports listen-only diagnostics. Its standby/sleep modes with bus wake-up keep the gateway responsive to network management frames with minimal battery drain. Wettable-flank packages improve AOI yield in high-volume gateway production lines using leadless VSON assemblies.
Recommended
Battery Management Systems (BMS)
EV and hybrid battery management systems use CAN to report cell voltages, temperatures, and faults. The TCAN843-Q1 suits BMS nodes because load-dump tolerance on VSUP, undervoltage protection, and ±transient robustness handle the noisy traction-battery environment in 12V and 24V systems. Sleep mode with INH gating allows the BMS to power down supervisory circuitry during vehicle-off states while retaining wake-up capability via CAN bus frames, critical for preserving battery state of charge.
Recommended
Industrial Transportation Networks
Off-highway, agricultural, and rail vehicles rely on CAN in harsh vibration and voltage-transient environments. The TCAN843-Q1's AEC-Q100 qualification, wide 3.3V-5.5V VIN logic range, and bus fault tolerance make it equally valid for 24V industrial vehicle ECUs. Its 5 Mbps CAN FD capability supports growing data volumes in telematics and control networks, while silent mode enables bus-monitoring diagnostic tools without disturbing network communication during troubleshooting sessions.
Recommended
On-Board Charger and Powertrain ECUs
Powertrain and on-board charger controllers communicate state and fault data over CAN FD. The TCAN843-Q1 provides the ISO 11898-2:2024 physical layer with TXD-dominant time-out preventing a stuck transmitter from blocking the bus, and thermal shutdown protecting against overload. Connecting VIN to the 3.3V MCU I/O supply of TI C2000 devices removes level-shifters. Load-dump support on VSUP accommodates cranking and load-dump transients common in alternator-driven systems.
Recommended
OBD and Diagnostic Interfaces
Diagnostic dongles and OBD tools benefit from the TCAN843-Q1's silent mode, which lets the tool listen to bus traffic without acknowledgment or drive disturbance. Sleep and standby modes allow the dongle to power down when the vehicle bus is idle, drawing minimal current from the vehicle battery. Support for classical CAN and 5 Mbps CAN FD covers legacy and current vehicle platforms in a single design, and the 14-SOIC package suits compact handheld adapter PCBs.
Recommended
Recommended Products Summary
Engineering reference data for TCAN843-Q1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TCAN1043A-Q1 | TCAN1043N-Q1 | TJA1462AT/118 |
|---|---|---|---|---|
| Package | 14-SOIC (D) / SOT / VSON, wettable flanks | 14-SOIC (D) - same | 14-SOIC (D) - same | SOIC-14 - same footprint, verify pin map |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | NXP Semiconductors |
| Max CAN FD Data Rate | 5 Mbps | 5 Mbps | 5 Mbps | 5 Mbps |
| ISO Spec Conformance | ISO 11898-2:2024 | Earlier ISO 11898-2 revision | Earlier ISO 11898-2 revision | ISO 11898-2:2016 |
| Sleep Mode with INH | Yes | Yes | Yes | Yes |
| AEC-Q100 | Qualified (Q1) | Qualified | Qualified | Qualified (automotive) |
Key Differentiators
- Certified to ISO 11898-2:2024 (vs TCAN1043A-Q1)
- Wettable-flank packages for AOI (vs TCAN1043N-Q1)
- Broader VIN logic range (vs TJA1462AT/118)
Design Notes
Place the TCAN843-Q1 as close as possible to the bus connector to minimize CANH/CANL stub length; long stubs cause signal reflections that degrade 5 Mbps CAN FD data-phase timing. Terminate the bus with a single 120-ohm resistor at each network end. Keep the VSUP decoupling capacitor (100 nF ceramic plus bulk) within 2 mm of the supply pin.
Connect VIN to the microcontroller I/O supply to set the logic level of TXD/RXD/EN pins - 3.3V MCUs and 5V MCUs are both supported via the 3.3V to 5.5V range. In sleep, use the INH output to gate external power supplies so all system power is removed except the transceiver, minimizing quiescent battery drain in always-on automotive nodes.
Do not leave the TXD line floating during MCU reset; a stuck-dominant TXD triggers TXD-dominant time-out and blocks bus communication, but relying on DTO as routine protection reduces system availability. Ensure wake-up events are masked properly during silent mode so diagnostics tools do not wake the node unintentionally. Verify wettable-flank AOI settings if substituting from non-wettable-flank alternates.
Compliance Information
AEC-Q1 automotive grade per TI naming and product page. REACH, halogen-free, and conflict-minerals status not stated in provided data.
