TCAN334DCNR - 3.3V CAN FD Transceiver, SOT-23-8 | Texas Instruments
料号： TCAN334DCNR ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 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 概述
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.
直接替换替代料： TCAN334DCNR ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： TCAN334DCNR （相同外形与封装尺寸） ——差异在于 Data Rate (max), Package, Protocol, Supply Voltage (VCC).
快速对比工具——选择替代料号进行并排对比：
TCAN337DCNR
✅ 直接替换📋 参考替代料（不在目录中）
TCAN330DCNR
✅ 直接替换📋 参考替代料（不在目录中）
TCAN332DCNR
✅ 直接替换📋 参考替代料（不在目录中）
TCAN334GDR
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TCAN1044DRQ1
✅ 直接替换✓ 有现货
$0.62 / 个
查看数据手册 →TCAN334DCNR 规格参数
| 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 |
| 工作温度范围 | -40 C to +125 C |
| Low-Power Modes | Shutdown, Standby |
| 封装 | SOT-23-8 (DCN) |
| 安装类型 | Surface Mount |
| 引脚数量 | 8 |
| Logic Input Compatibility | 3.3-V CMOS / TTL (5-V tolerant) |
| Dominant Time-out | Yes (integrated) |
| 热关断 | Yes (integrated) |
| RoHS 状态 | Compliant |
| Automotive Grade | No (industrial / consumer); see TCAN334-Q1 for AEC-Q100 |
TCAN334DCNR 引脚配置
| 引脚 1 | TXD — CAN transmit data input from MCU (logic-level) |
| 引脚 2 | GND — Ground |
| 引脚 3 | VCC — 3.3-V supply |
| 引脚 4 | RXD — CAN receive data output to MCU (logic-level) |
| 引脚 5 | NC — Not connected (per datasheet) |
| 引脚 6 | CANL — Low-level CAN bus line |
| 引脚 7 | CANH — High-level CAN bus line |
| 引脚 8 | STB — Standby / mode-select input (high = standby) |
典型应用
TCAN334DCNR 适用于 6 应用s: 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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： TCAN334DCNR ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 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) |
关键差异点
- Smallest CAN FD transceiver in TI catalog （对比 TCAN334GDR (SOIC-8))
- 3.3-V-only supply rail simplifies BOM （对比 TCAN337DCNR)
- Integrated dominant time-out protects bus （对比 TCAN332DCNR)
设计说明
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.
合规信息
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.
