PCA82C251T/YM,112 - CAN Transceiver for 24V Systems | NXP
料号： PCA82C251T-YM112 ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.85 | $1.85 |
| 10 | $1.66 | $16.60 |
| 100 | $1.47 | $147.00 |
| 500 | $1.31 | $655.00 |
| 1,000 | $1.16 | $1,160.00 |
| 2,500 | $1.04 | $2,600.00 |
PCA82C251T-YM112 概述
What is a CAN transceiver? A CAN transceiver (Controller Area Network transceiver) is a physical-layer interface IC that bridges a digital CAN protocol controller — typically a microcontroller with a built-in CAN module — and the differential CAN bus wiring found in vehicles, industrial equipment, and factory automation systems. Within the broader semiconductor hierarchy, a CAN transceiver belongs to the Interface ICs family, which sits inside the Integrated Circuits product tree. It is the companion IC to a CAN controller, the safety/transceiver side of an automotive/industrial bus, providing the differential drive strength, common-mode tolerance, and bus-fault robustness that digital logic alone cannot deliver.
Key features of the PCA82C251T/YM,112 include slope-control to reduce Radio Frequency Interference (RFI), thermal shutdown protection, short-circuit protection on the bus pins, and an exposed thermal pad-friendly SO-8 footprint. The transceiver provides recessive and dominant bus states compliant with ISO 11898-24 V, can detect a permanent dominant condition on the bus, and includes a low-current standby mode controlled via the Rs (slope / standby) pin. The bus pins (CANH, CANL) survive load-dump transients encountered in 12 V and 24 V automotive/industrial environments, making the part the workhorse interface for truck, bus, agricultural, and off-road vehicle networks.
Internally, the PCA82C251T/YM,112 uses a bipolar transmitter architecture with a precision differential output stage. The slope-control pin (pin 8) lets the designer trade edge rate against RFI; slower edges reduce emissions on unshielded bus cabling at the cost of maximum achievable bit rate. The receiver compares the bus differential voltage against an internal reference with sufficient hysteresis to reject common-mode noise, and the TXD input feeds a dominant/recessive driver that pulls the bus to the ISO 11898-24 V defined levels. A thermal shutdown block protects the output stage against continuous short circuits on CANH or CANL.
Typical applications include in-vehicle CAN networks for trucks, buses and agricultural machinery, industrial automation CAN nodes, building automation (HVAC, lifts), and any 24 V battery-powered CAN segment requiring compliance with ISO 11898-24 V. Designers pair the PCA82C251T/YM,112 with microcontrollers that include a CAN controller (such as NXP LPC, S32K, or Kinetis families) and external protection components (TVS diodes, common-mode chokes) on the bus side.
When designing with this transceiver, fit a split-termination network (typically 60 Ω total with a 10 nF to 100 nF capacitor to ground) close to the bus pins to match the cable impedance and improve EMC. Slope-control resistance should be chosen to keep edge times short enough for the target baud rate while still meeting automotive EMC limits. Ensure the supply is decoupled with a 100 nF ceramic capacitor placed within a few millimeters of the VCC pin.
This page synthesizes NXP datasheet specifications, distributor pricing as of 2026-10-13, drop-in alternatives (same-brand first, then cross-brand), and practical design notes not found in the standalone datasheet to give engineers an actionable component reference.
直接替换替代料： PCA82C251T-YM112 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
PCA82C250T/YM,118
✅ 直接替换📋 参考替代料（不在目录中）
TJA1057T/CM,118
✅ 直接替换📋 参考替代料（不在目录中）
PCA82C251T/YM,118
✅ 直接替换📋 参考替代料（不在目录中）
TJA1050T/CM,118
✅ 直接替换📋 参考替代料（不在目录中）
MCP2551-I/SN
✅ 直接替换📋 参考替代料（不在目录中）
PCA82C251T-YM112 规格参数
| 功能 | CAN Transceiver |
| Protocol | CANbus |
| Number of Drivers/Receivers | 1/1 |
| Duplex | Half |
| 数据速率 | Up to 1 Mbaud |
| Supply Voltage (VCC) | 4.5 V to 5.5 V |
| Bus Common-Mode Voltage | -2 V to +5 V (data signalling); ±25 V tolerant (load-dump, per ISO 7637) |
| 工作温度 | -40 C to +125 C |
| 封装 | 8-pin SOIC (SOT96-1 / SO-8, 3.90 mm body width) |
| 安装类型 | Surface Mount |
| Slope Control | Yes (Rs pin) |
| 热关断 | Yes |
| Short-Circuit Protection | Yes (bus pins to GND/VBAT) |
| Standard Compliance | ISO 11898-24 V |
PCA82C251T-YM112 引脚配置
| 引脚 1 | TXD — Transmit data input from CAN controller (low for dominant bus state) |
| 引脚 2 | GND — Ground |
| 引脚 3 | VCC — 5 V supply input (4.5 V to 5.5 V) |
| 引脚 4 | RXD — Receive data output to CAN controller (low during dominant bus state) |
| 引脚 5 | Vref — Reference voltage output (nominally VCC/2); used for split-termination biasing |
| 引脚 6 | CANL — CAN bus low-level line (differential pair with CANH) |
| 引脚 7 | CANH — CAN bus high-level line (differential pair with CANL) |
| 引脚 8 | Rs — Slope control / standby mode input; resistor to GND programs edge rate, < 1 V forces standby |
典型应用
PCA82C251T-YM112 适用于 6 应用s: Truck and Bus CAN Networks (24 V), Agricultural and Off-Road Vehicle CAN, Industrial CAN Nodes (24 V Systems), Building Automation CAN Segments, Battery Management Systems (BMS) CAN Interface, Legacy Automotive 24 V Bus Service and Repair.
Truck and Bus CAN Networks (24 V)
The PCA82C251T/YM,112 is the canonical CAN transceiver for 24 V commercial-vehicle networks, where ISO 11898-24 V compliance and ±25 V load-dump transient tolerance (per ISO 7637) are mandatory. Its 4.5 V–5.5 V single-supply operation keeps the digital side on a clean 5 V rail while the bus pins survive the harsh 24 V battery environment. The half-duplex 1/1 driver/receiver pair delivers up to 1 Mbaud, sufficient for J1939 body and powertrain messaging. Pair with an NXP S32K or LPC microcontroller CAN controller and a split-termination network (60 Ω with 10–100 nF to GND) close to CANH/CANL for production EMC compliance.
推荐
Agricultural and Off-Road Vehicle CAN
Tractors, combines, and off-road machinery run 24 V CAN bus segments that must tolerate wide temperature swings, vibration, and DC load-dump events. The PCA82C251T/YM,112’s -40 C to +125 C operating range and ±25 V bus transient tolerance make it a proven interface for ISO 11783 (ISOBUS) networks. Its slope-control pin (Rs) lets the designer slow the bus edges to meet the EMC limits imposed by long unshielded harvester and implement cabling, at the cost of maximum bit rate. Place a common-mode choke and TVS diode array on the bus side for production-grade surge protection.
推荐
Industrial CAN Nodes (24 V Systems)
Factory automation and process-control PLCs frequently operate from a 24 V DC bus and require CAN connectivity to remote I/O blocks, motor drives, and sensors. The PCA82C251T/YM,112 bridges a 5 V microcontroller CAN controller to the 24 V industrial CAN segment while maintaining full ISO 11898-24 V compliance. Its thermal shutdown and short-circuit protection on CANH/CANL guard the node against wiring errors common in cabinet installations. The slope-control feature is useful here for meeting EN 61000-6-4 industrial emission limits on long bus runs.
推荐
Building Automation CAN Segments
HVAC controllers, elevator drive units, and access-control panels often use 24 V CAN for inter-module communication in buildings. The PCA82C251T/YM,112 provides the physical interface between a 3.3 V or 5 V MCU CAN controller and the building’s 24 V CAN backbone, while slope control reduces RFI that could interfere with nearby sensitive electronics. Its low standby current (when Rs is pulled low) makes it suitable for always-on building infrastructure where quiescent power budget matters.
推荐
Battery Management Systems (BMS) CAN Interface
Lithium-ion battery packs in commercial EVs, stationary storage, and telecom backup often expose a 24 V or 48 V CAN interface for charger and vehicle communication. The PCA82C251T/YM,112 connects the BMS microcontroller to that CAN bus, withstanding the load-dump and jump-start transients typical in these battery environments. Combined with external TVS protection on CANH/CANL, the transceiver provides a robust galvanically isolated or non-isolated CAN port. Designers transitioning to new programs should evaluate the TJA1057 family as the modern successor.
推荐
Legacy Automotive 24 V Bus Service and Repair
Older commercial vehicles and specialty equipment still on the road carry PCA82C251-based 24 V CAN nodes that occasionally need field service. The PCA82C251T/YM,112 is the OEM-specified replacement that drops into the existing SO-8 footprint without PCB rework, restoring ISO 11898-24 V compliance on legacy CAN segments. Use the NXP PCA82C250T/YM,118 only if the segment is verified 12 V. For new production, NXP recommends migrating to TJA1057T for active lifecycle and improved EMC margins.
推荐
推荐产品汇总
工程参考数据： PCA82C251T-YM112 ——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 | PCA82C250T/YM,118 | TJA1057T/CM,118 | PCA82C251T/YM,118 | TJA1050T/CM,118 | MCP2551-I/SN |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | Microchip Technology |
| Package | 8-SOIC (SOT96-1, 3.90 mm) | 8-SOIC — same | 8-SOIC — same | 8-SOIC — same | 8-SOIC — same | 8-SOIC (3.90 mm) — same |
| Function | CAN Transceiver, 24 V (ISO 11898-24 V) | CAN Transceiver, 12 V (ISO 11898) | CAN Transceiver, 24 V (ISO 11898-24 V, modern) | CAN Transceiver, 24 V (ISO 11898-24 V) | CAN Transceiver, 12 V (ISO 11898) | CAN Transceiver, 12 V (ISO 11898) |
| Supply Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
| Maximum Data Rate | 1 Mbaud | 1 Mbaud | 1 Mbaud | 1 Mbaud | 1 Mbaud | 1 Mbaud |
| Slope Control | Yes (Rs pin) | Yes (Rs pin) | Yes (STB pin) | Yes (Rs pin) | Yes (STB pin) | Yes (Rs pin) |
| Bus Voltage Tolerance (Load-Dump) | ±25 V (24 V systems) | ±25 V (12 V systems) | ±25 V (24 V systems) | ±25 V (24 V systems) | ±25 V (12 V systems) | ±25 V (12 V systems) |
| Lifecycle Status | NRND | NRND | Active | NRND | Active | Active |
| Recommended for New Designs? | No (NRND) | No (NRND) | Yes (preferred for new 24 V designs) | No (NRND) | Yes (preferred for new 12 V designs) | Yes (Microchip 12 V option) |
关键差异点
- ISO 11898-24 V compliance for 24 V commercial-vehicle networks （对比 MCP2551-I/SN)
- Active NRND-free modern successor with same SO-8 footprint （对比 TJA1057T/CM,118)
- 24 V vs 12 V optimization — same SO-8 footprint （对比 PCA82C250T/YM,118)
设计说明
Place the bus split-termination network (typically two 60 Ω resistors in series with a 10 nF to 100 nF capacitor to ground at the midpoint) within 10 mm of the CANH and CANL pins. Keep the CANH/CANL traces as a closely-coupled differential micro-strip of 120 Ω differential impedance, and avoid routing them near noisy switching nodes. This minimizes reflections and maximizes EMC margin in 24 V truck/bus installations.
Decouple the VCC pin (pin 3) with a 100 nF ceramic capacitor placed within 5 mm of the pin, and add a 10 µF bulk capacitor on the 5 V rail near the transceiver. The PCA82C251T/YM,112 has no internal reverse-battery protection on VCC; add an external Schottky diode or P-FET reverse-polarity block on the 5 V rail for 24 V battery environments where reversed supply is a service-bay risk.
Do not leave the Rs (slope-control) pin floating — tie it to ground through a resistor whose value sets the desired edge rate (typically 10 kΩ to 100 kΩ for 1 Mbaud operation, larger values reduce RFI but lower maximum bit rate). Forcing Rs below ~1 V places the part in low-power standby where the bus driver is disabled and RXD reflects bus state; do not rely on standby for normal operation. The Vref output (pin 5) is intended only for split-termination biasing and should not be loaded with more than a few hundred microamps.
The 8-pin SOIC (SOT96-1) package has a junction-to-ambient thermal resistance (θJA) in the 150–170 C/W range when mounted on a standard JEDEC 2s2p 4-layer board. At 5 V supply and dominant bus state the device dissipates roughly 100 mW per transceiver — well within thermal limits — but a permanent bus short to battery can drive junction temperature up; the internal thermal shutdown engages to protect the output stage.
For long CAN bus segments (> 100 m) in 24 V truck or industrial installations, add a common-mode choke (e.g., ACT45B-510 series) in series with CANH/CANL and bidirectional TVS diode arrays (e.g., PESD1CAN or NUP2105L) close to the bus connector. The PCA82C251T/YM,112 provides ±25 V transient tolerance internally, but external TVS devices are required to clamp ISO 7637 pulse 1/2/3a transients in production hardware.
合规信息
Lead-free per Mouser listing ('Lead Free Status: Lead Free'). RoHS/REACH/AEC-Q100 status not explicitly confirmed in the verified web snippets — confirm with NXP or distributor documentation before quoting compliance-critical programs. The part targets trucks/buses/agricultural machinery 24 V CAN networks and is not AEC-Q100 qualified (industrial/automotive non-safety use).
