PCA82C251T-YM118 - 24V CAN Transceiver, 1Mbps, SOIC-8 | NXP
MPN: PCA82C251T-YM118 ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.85 | $1.85 |
| 10 | $1.65 | $16.50 |
| 100 | $1.42 | $142.00 |
| 500 | $1.18 | $590.00 |
| 1,000 | $0.98 | $980.00 |
| 2,500 | $0.84 | $2,100.00 |
PCA82C251T-YM118 Overview
A CAN transceiver (Controller Area Network transceiver) is a physical-layer device that converts the digital transmit/receive logic of a CAN protocol controller into the differential voltage signaling required by the CAN bus standard (ISO 11898). Within the broader system hierarchy, a CAN transceiver sits between the protocol controller (MCU) and the physical wiring harness, and belongs to the family of differential line drivers / interface ICs / wired-connectivity semiconductors. The 82C251 is the third-generation "PCA82C251" device, designed for 24 V truck and bus applications and predates the modern TJA1050 / TJA1042 / TJA1051 family.
Key features include ±27 V bus fault protection on CANH and CANL, thermal shutdown with automatic recovery, a current-limited transmitter for short-circuit protection on the bus, and a low-current standby mode (typ. 275 µA supply current per Mouser listing). The differential receiver provides high common-mode rejection, and the driver stage supports slew-rate-limited transmission at speeds up to 1 Mbaud. The device exposes TxD, RxD, VCC, GND, CANH, CANL, Vref, and Rs pins on the SO-8 footprint.
The architecture uses a bipolar process optimized for high bus voltage tolerance, with on-chip protection diodes clamping transient voltages beyond the supply rails. The Rs pin selects between high-speed, slope-control, and standby modes, providing a software/hardware mechanism for EMC tuning or low-power operation when the bus is idle.
Typical applications include 24 V truck and bus CAN nodes, industrial CANopen networks, automotive body and chassis ECUs, agricultural machinery telemetry, and marine electronics. It is a pin-compatible second-source for the legacy PCA82C251 footprint, useful when modern 12 V TJA parts are not suitable.
When designing with this part, place a 100 nF decoupling capacitor close to the VCC pin and use a split termination (60 Ω + 60 Ω + 100 nF to ground) at each end of the CAN bus for proper 24 V signal integrity. The Rs pin mode selection must be configured via a resistor to ground or to VCC; leaving it floating is not recommended. The PCA82C251T is marked NRND by NXP - prefer the TJA1051T or TJA1057T for new designs, but this part remains in production for legacy 24 V applications.
This page synthesizes distributor stock, parametric data, drop-in second sources, and application guidance drawn from NXP's PCA82C251 datasheet plus current distributor inventory, not all of which appears in a single manufacturer PDF.
Drop-in alternatives for PCA82C251T-YM118 — 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:
PCA82C251T/N,118
✅ Drop-In📋 Reference alternative (not in catalog)
PCA82C250T/YM,118
✅ Drop-In📋 Reference alternative (not in catalog)
TJA1051T/CM,118
✅ Drop-In📋 Reference alternative (not in catalog)
TJA1050T/CM,118
✅ Drop-In📋 Reference alternative (not in catalog)
TJA1042T/3,118
✅ Drop-In📋 Reference alternative (not in catalog)
PCA82C251T-YM118 Specifications
| Function | CAN bus transceiver (ISO 11898) |
| Number of Drivers/Receivers | 1/1 (Half-duplex) |
| Protocol | CAN |
| Data Rate (max) | 1 Mbps (1 Mbaud) |
| Supply Voltage (VCC) | 4.5 V to 5.5 V |
| Supply Current | 275 µA (typical) |
| Bus Fault Voltage (CANH/CANL) | ±27 V |
| Package | 8-SOIC (SO-8, SOT96-1) |
| Mounting Type | Surface Mount |
| Pin/Package Count | 8 |
| Mode Selection (Rs pin) | High-speed / Slope control / Standby |
| RoHS Status | Compliant (YM suffix denotes lead-free / RoHS) |
| Lifecycle Status | NRND (Not Recommended for New Designs) |
| Vref Output | 0.45 × VCC to 0.55 × VCC (typ.) |
PCA82C251T-YM118 Pin Configuration
| Pin 1 | TxD — Transmit data input from CAN controller (TTL-level) |
| Pin 2 | GND — Ground |
| Pin 3 | VCC — 5 V supply voltage (4.5 V to 5.5 V) |
| Pin 4 | RxD — Receive data output to CAN controller (TTL-level) |
| Pin 5 | Vref — Reference voltage output (~0.5 × VCC) for CANH/CANL biasing |
| Pin 6 | CANL — CAN bus low line (differential) |
| Pin 7 | CANH — CAN bus high line (differential) |
| Pin 8 | Rs — Mode select: GND=high-speed, slope-control via R to GND, VCC=standby |
Typical Applications
PCA82C251T-YM118 is suitable for 6 applications: 24V Truck and Bus CAN Networks, Industrial CANopen Networks, Agricultural Machinery Telemetry, Marine Electronics and Boat Networks, Body and Chassis Automotive ECUs, Building Automation and HVAC CANbus.
24V Truck and Bus CAN Networks
The PCA82C251T-YM118 is the original NXP-recommended transceiver for 24 V truck and bus CAN nodes, where its ±27 V bus fault tolerance protects against load-dump transients and reverse-battery conditions on heavy-vehicle wiring harnesses. With 1 Mbps data rate support and the legacy high-speed/slope-control modes on the Rs pin, it integrates cleanly into SAE J1939 stacks used in commercial vehicle powertrain, body, and chassis ECUs. The device's bipolar process and on-chip protection diodes handle the harsh ISO 7637 transient environment of 24 V trucks. It is paired with the SJA1000 stand-alone CAN controller or with integrated CAN modules in NXP Kinetis and MPC56 families. Compared to TJA1051T, it lacks CAN FD but is otherwise electrically compatible in 24 V systems.
Recommended
Industrial CANopen Networks
For CANopen (CiA 401/402/406) networks operating on 24 V industrial backplanes, the PCA82C251T-YM118 provides the differential physical layer required by ISO 11898. Its 5 V single-supply operation simplifies power design, while the ±27 V common-mode range tolerates ground-shift voltages common on long factory-bus cable runs. The Rs pin's slope-control mode reduces EMI in dense control cabinets, helping meet EN 61000-4-2/4 industrial EMC requirements. The part is used in servo drives, PLCs, and I/O modules where 24 V is the dominant I/O rail. A 100 nF decoupling cap close to VCC and a 60 Ω split termination on the bus are the typical application circuits; these are identical to those of the TJA1051T replacement.
Recommended
Agricultural Machinery Telemetry
Agricultural machinery (ISO 11783 / ISOBUS) and construction equipment use 24 V CAN networks to interconnect tractors, implements, and implement ECUs across long cable runs in high-vibration environments. The PCA82C251T-YM118 is well-suited here because its ±27 V bus tolerance handles jump-start and load-dump events on 24 V vehicle batteries, and its SO-8 package withstands the thermal cycling of outdoor enclosures. With the slope-control mode on Rs, it meets CISPR 25 / ISO 13766 EMC emissions for off-road machinery. The transceiver pairs with NXP's K66 family of CAN-capable MCUs in modern ISOBUS implement controllers. For new ISOBUS designs with CAN FD, prefer the TJA1051T as a pin-compatible upgrade.
Recommended
Marine Electronics and Boat Networks
Marine CAN bus (NMEA 2000) installations often run on 12 V or 24 V battery systems with significant ground-shift voltages on long bus cables; the PCA82C251T-YM118's ±27 V common-mode range and ±27 V bus fault tolerance handle these harsh conditions. Used in marine chartplotters, autopilots, and engine-monitoring ECUs, it provides the differential physical layer required for reliable data transfer in the presence of alternator noise and switching transients. The device's bipolar process technology offers strong ESD robustness suitable for salt-air environments where connector maintenance is intermittent. Pairing the 82C251 with an NXP K66 or LPC54618 MCU running the NMEA 2000 stack is a typical design pattern. The TJA1051T is the modern 24 V drop-in replacement with CAN FD support for new marine designs.
Recommended
Body and Chassis Automotive ECUs
The PCA82C251T-YM118 is used in 24 V body and chassis ECUs (door modules, lighting controllers, HVAC units) on commercial vehicles, where the differential CAN bus provides reliable communication in the electrically noisy body-wiring environment. Its 1 Mbps maximum data rate handles typical body-network traffic (window/lock/seat/HVAC nodes), and the integrated bus-fault protection removes the need for external TVS diodes in most 24 V designs. The 8-pin SO footprint is one of the smallest CAN transceivers available, enabling compact ECU designs behind dashboards and in door cavities. The device's standby mode (Rs pin high) drops supply current for ECU sleep states, important for vehicle battery preservation. Modern body controllers should migrate to TJA1051T or TJA1042T for CAN FD readiness.
Recommended
Building Automation and HVAC CANbus
Building automation backbones (HVAC, energy metering, access control) sometimes use 24 V CANbus to integrate disparate subsystems; the PCA82C251T-YM118 is a fit where existing PCA82C251 designs are being maintained or expanded. The device's 5 V supply and SO-8 footprint simplify integration with existing controller boards that have only 5 V rails, while the ±27 V bus tolerance handles long building-bus cable runs with significant ground potential differences. Used in legacy BACnet-over-CAN or proprietary building-management deployments, the transceiver supports up to 1 Mbps for the higher-bandwidth metering data streams. For new installations, NXP recommends TJA1051T as the modern equivalent with CAN FD and improved EMC.
Recommended
Recommended Products Summary
Engineering reference data for PCA82C251T-YM118 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PCA82C251T/N,118 | PCA82C250T/YM,118 | TJA1051T/CM,118 | TJA1050T/CM,118 | TJA1042T/3,118 |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | SOIC-8 (SOT96-1) | SOIC-8 (SOT96-1) - same | SOIC-8 (SOT96-1) - same | SOIC-8 (SOT96-1) - same | SOIC-8 (SOT96-1) - same | SOIC-8 (SOT96-1) - same |
| Function | CAN transceiver (ISO 11898, 24V) | CAN transceiver (24V) | CAN transceiver (12V) | CAN FD transceiver (24V) | CAN transceiver (12V) | CAN FD transceiver (12V) |
| Bus Voltage Tolerance | ±27 V | ±27 V | ~±16 V (12V systems) | ±42 V (improved) | ~±16 V (12V systems) | ~±16 V (12V systems) |
| Supply Voltage (VCC) | 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 |
| Max Data Rate | 1 Mbps | 1 Mbps | 1 Mbps | 5 Mbps (CAN FD) | 1 Mbps | 5 Mbps (CAN FD) |
| Lifecycle Status | NRND | NRND | NRND | Active | Active (legacy) | Active |
| RoHS Compliance | Yes (YM suffix) | No (N suffix) | Yes | Yes | Yes | Yes |
Key Differentiators
- Wide bus fault tolerance for 24 V automotive/industrial systems (vs TJA1050T/CM,118)
- Original NXP-recommended part for legacy PCA82C251 designs (vs TJA1051T/CM,118)
- Same SOIC-8 footprint across the 82C250/82C251/TJA1050/TJA1051 family (vs PCA82C250T/YM,118)
Design Notes
Estimated: PCA82C251T-YM118 typical supply current is 275 µA in standby and rises to ~70 mA during dominant transmission with a 60 Ω bus load. Place a 100 nF ceramic decoupling capacitor as close as possible to the VCC pin (pin 3), with a short ground return to pin 2 (GND); a bulk 10 µF tantalum or ceramic is recommended if the supply is shared with noisy circuits.
Use the standard SOIC-8 land pattern (JEDEC SO-8) with pin 1 marked by a dot or notch per SOT96-1. Route CANH and CANL as a tightly coupled differential pair (100 Ω nominal impedance) with a continuous ground reference plane beneath; keep them away from switching nodes (DC-DC, relay coils). Place a split termination (60 Ω + 60 Ω with 4.7 nF to ground) at each bus end - never use a single 120 Ω resistor at the device pins.
Do not substitute the TJA1050T (12 V part) into a 24 V truck/bus design - its reduced bus fault tolerance will fail under load-dump. Configure the Rs pin (pin 8) explicitly: tie to GND for high-speed, use a resistor to GND for slope-control, or tie to VCC for standby; a floating Rs pin leaves the device in an undefined mode. Note that the PCA82C251T is NRND - for new designs, choose TJA1051T (24 V) or TJA1042T (12 V) instead.
Slope-control mode (Rs = ~10-100 kΩ to GND) reduces EMI by slowing the CANH/CANL edge rates at the cost of maximum data rate; for 1 Mbps high-speed networks keep Rs grounded. The Vref output (pin 5, nominally 0.5 × VCC) can be used to bias optocouplers in isolated CAN designs, but its 5 mA source/sink capability is limited - do not use it as a power supply for other circuits.
Compliance Information
RoHS and lead-free status confirmed by "/YM" suffix per NXP part-numbering convention. AEC-Q100 automotive qualification status not explicitly confirmed in the available data - marked unknown. REACH compliance is assumed compliant per NXP product page but not explicitly verified for this lot.
