TCAN334DCNR - 3.3V CAN FD Transceiver, SOT-23-8 | Texas Instruments
MPN: TCAN334DCNR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.62 | $1.62 |
| 10 | $1.3 | $13.00 |
| 100 | $1.05 | $105.00 |
| 500 | $0.88 | $440.00 |
| 1,000 | $0.76 | $760.00 |
| 3,000 | $0.65 | $1,950.00 |
TCAN334DCNR Overview
A CAN transceiver is a physical-layer interface IC that converts the differential digital signals of a CAN protocol controller into the robust, fault-tolerant differential signaling required on the automotive or industrial CAN bus. Within the broader hierarchy, a CAN transceiver sits below the CAN controller (typically integrated in an MCU) and above the physical twisted-pair bus; it belongs to the Interface ICs > Networking transceivers category and is essential for in-vehicle networking (CAN, CAN FD), industrial automation (CANopen, DeviceNet), and any distributed control system requiring reliable multi-node communication.
Key features include 3.3-V single-supply operation compatible with 3.3-V MCUs (no level shifter required), ultra-low current consumption in Shutdown/Standby modes, integrated bus dominant time-out protection, thermal shutdown, and an internal slope-control / driver output that meets the ISO 11898-2 (High-Speed CAN) requirements. Logic-side inputs are TTL-compatible and tolerate 5-V MCU rails.
The TCAN334DCNR uses TI's BiCMOS process, allowing the high-voltage bus side (up to +-18-V fault on CANH/CANL) to coexist with the low-voltage 3.3-V digital core. Loop-delay symmetry is optimized for CAN FD frames with payload bit rates beyond 1 Mbps on the data phase, ensuring robust arbitration-to-data transitions.
Typical applications include automotive body electronics (door modules, HVAC, seat controllers), industrial sensor networks, building automation, battery management (BMS) slave-node communication, and any 3.3-V MCU system requiring a compact CAN physical interface.
When designing with this device, ensure the CAN bus termination (typically 120 ohms at each bus end) is correct, and route the CANH/CANL traces as a 100-ohm differential pair on the PCB. The 8-pin SOT-23 footprint gives strong thermal coupling for a small package, allowing sustained high-bus-traffic operation without exceeding junction ratings.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, supporting faster design decisions for embedded engineers.
Drop-in alternatives for TCAN334DCNR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with TCAN334DCNR (same form factor and footprint) — differing in Data Rate (max), Package, Protocol, Supply Voltage (VCC).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TCAN337DCNR
✅ Drop-In📋 Reference alternative (not in catalog)
TCAN330DCNR
✅ Drop-In📋 Reference alternative (not in catalog)
TCAN332DCNR
✅ Drop-In📋 Reference alternative (not in catalog)
TCAN334GDR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TCAN1044DRQ1
✅ Drop-In✓ In Stock
$0.62 / Unit
View Datasheet →TCAN334DCNR Specifications
| Product Type | CAN Transceiver (CAN FD, High-Speed) |
| Number of Drivers/Receivers | 1/1 |
| Protocol | ISO 11898-1 (CAN / CAN FD) |
| Supply Voltage (VCC) | 3.0 V to 3.6 V (typical 3.3 V) |
| Data Rate (max) | 1 Mbps |
| Operating Temperature Range | -40 C to +125 C |
| Low-Power Modes | Shutdown, Standby |
| Package | SOT-23-8 (DCN) |
| Mounting Type | Surface Mount |
| Pin Count | 8 |
| Logic Input Compatibility | 3.3-V CMOS / TTL (5-V tolerant) |
| Dominant Time-out | Yes (integrated) |
| Thermal Shutdown | Yes (integrated) |
| RoHS Status | Compliant |
| Automotive Grade | No (industrial / consumer); see TCAN334-Q1 for AEC-Q100 |
TCAN334DCNR Pin Configuration
| Pin 1 | TXD — CAN transmit data input from MCU (logic-level) |
| Pin 2 | GND — Ground |
| Pin 3 | VCC — 3.3-V supply |
| Pin 4 | RXD — CAN receive data output to MCU (logic-level) |
| Pin 5 | NC — Not connected (per datasheet) |
| Pin 6 | CANL — Low-level CAN bus line |
| Pin 7 | CANH — High-level CAN bus line |
| Pin 8 | STB — Standby / mode-select input (high = standby) |
Typical Applications
TCAN334DCNR is suitable for 6 applications: Automotive Body Electronics, Industrial Sensor Nodes (CANopen / DeviceNet), Battery Management System (BMS) Slave Modules, Building Automation (BACnet MS-TP over CAN), Agricultural and Off-Highway Vehicles, Medical and Laboratory Instrumentation.
Automotive Body Electronics
The TCAN334DCNR fits automotive body-electronics modules such as door controllers, HVAC heads, seat controllers, and lighting ECUs that need a compact ISO 11898 CAN interface. Its 3.3-V supply aligns with modern automotive MCUs that no longer want a 5-V CAN rail, eliminating level shifters and reducing BOM cost. CAN FD support lets body modules take advantage of higher diagnostic upload rates to the central gateway. The SOT-23-8 footprint allows integration in tight PCB corners of mirror modules and small actuators.
Recommended
Industrial Sensor Nodes (CANopen / DeviceNet)
Distributed industrial sensor networks running CANopen or DeviceNet benefit from the TCAN334DCNR's small footprint and low standby current. Each slave node only needs the transceiver, a 3.3-V MCU, and an isolated 24-V CAN power supply to participate in a deterministic multi-drop bus. The integrated dominant time-out prevents a faulty stuck-dominant node from disabling the entire bus - critical for factory-floor reliability. Its industrial -40 C to +125 C temperature range suits outdoor cabinets and motor-control cabinets.
Recommended
Battery Management System (BMS) Slave Modules
In multi-cell lithium-ion battery stacks, each slave module communicates telemetry to a master over CAN. The TCAN334DCNR's Shutdown and Standby modes cut quiescent current to a minimum during low-activity periods, directly extending battery standby time - a key requirement in e-bike, power-tool, and solar storage batteries. The 3.3-V supply matches modern battery monitor ICs, simplifying the slave-module PCB by avoiding charge-pump or LDO rails for the CAN interface.
Recommended
Building Automation (BACnet MS-TP over CAN)
Building automation networks often run CAN-derived protocols (BACnet, LON over CAN) over long cable runs. The TCAN334DCNR's bus-fault tolerance and dominant time-out protect the network from a single shorted or stuck node. Its small SOT-23-8 footprint allows integration into wall-mount sensors and compact actuator controllers. Operating from -40 C to +125 C it handles rooftop or basement equipment conditions without derating.
Recommended
Agricultural and Off-Highway Vehicles
Tractors, harvesters, and off-highway machinery use CAN bus (SAE J1939) to connect engine, transmission, hydraulic, and GPS subsystems in high-vibration environments. The TCAN334DCNR's integrated protection features - thermal shutdown, dominant time-out, bus-fault tolerant - suit these harsh conditions. Its compact SOT-23-8 footprint drops onto small ECU sub-boards without competing for area with high-current MOSFETs and connectors.
Recommended
Medical and Laboratory Instrumentation
Bench-top analyzers and laboratory centrifuges often use CAN internally to link peristaltic pumps, valve manifolds, and optical sensors. The TCAN334DCNR's CAN FD bandwidth (1 Mbps data-phase) allows quick transfer of dense diagnostic data to the user-interface MCU. The 3.3-V supply rail matches modern display-driver MCUs, reducing total IC count in the BOM and improving long-term manufacturability compared to legacy 5-V-only systems.
Recommended
Recommended Products Summary
Engineering reference data for TCAN334DCNR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TCAN337DCNR | TCAN330DCNR | TCAN332DCNR | TCAN1044DRQ1 |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | SOT-23-8 (DCN) | SOT-23-8 (DCN) - same | SOT-23-8 (DCN) - same | SOT-23-8 (DCN) - same | SOIC-8 (D) |
| Supply Voltage | 3.3 V (3.0 to 3.6 V) | 3.3 to 5 V | 3.3 V (3.0 to 3.6 V) | 3.3 V (3.0 to 3.6 V) | 5 V (4.5 to 5.5 V) |
| CAN FD Support | Yes (up to 1 Mbps data-phase) | Yes (up to 1 Mbps data-phase) | No (classic CAN only) | No (classic CAN legacy) | Yes (up to 5 Mbps) |
| Automotive Grade (AEC-Q100) | No | No | No | No | Yes |
| Low-Power Modes | Shutdown + Standby | Shutdown + Standby | Shutdown + Standby | Shutdown only | Standby |
| Operating Temperature | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C | -55 C to +150 C (Grade 1) |
Key Differentiators
- Smallest CAN FD transceiver in TI catalog (vs TCAN334GDR (SOIC-8))
- 3.3-V-only supply rail simplifies BOM (vs TCAN337DCNR)
- Integrated dominant time-out protects bus (vs TCAN332DCNR)
Design Notes
Route CANH and CANL as a tightly coupled 100-ohm differential pair with characteristic impedance of 120 ohms (per ISO 11898). Keep pair length < 0.5 m internally; longer stubs degrade signal integrity. Place 0603-size ESD protection arrays (e.g., PESD1CAN) within 10 mm of the connector-side bus pins. Decouple VCC with a 100 nF X7R 0402 ceramic within 2 mm of pin 3, plus a 4.7 uF bulk capacitor shared with other 3.3-V loads. Avoid routing digital signals parallel to the CAN pair; cross perpendicularly if needed.
Ensure the STB (standby) pin is pulled low through a 10 kohm resistor (or driven explicitly low) on initial power-up, or the part will remain in standby and the bus will be silent. Do not leave STB floating. Also, ensure the CAN bus has exactly two 120-ohm termination resistors - one at each physical bus end. A mid-bus termination or missing termination causes reflections that intermittently corrupt CAN frames. Dominant time-out is integrated, but an external software watchdog on the MCU's CAN error counters is also recommended for ISO 11898 reliability.
Estimated: At full bus load (1 Mbps continuous TX), the TCAN334DCNR typical VCC current is approximately 45-55 mA. For a 3.3-V LDO with 100-mA output, ensure headroom for other 3.3-V loads (MCU, sensors). Dropout voltage at 60 mA is ~50 mV, so a TPS7A0233 LDO with 200-mV dropout margin is sufficient. Add bulk capacitance to handle in-rush during bus-dominant arbitration phases. Where multiple transceivers share a rail, use individual ferrite beads to isolate noise.
Compliance Information
Per TI product page, TCAN334DCNR is RoHS compliant. Non-automotive grade - use TCAN334-Q1 (AEC-Q100) for automotive projects. Halogen-free status not stated on the part-details page; confirm with TI environmental declaration if required.
