PCA82C251T/N3,118 - 24V CAN Transceiver SOIC-8 | NXP
部品番号: PCA82C251T-N3118 ✗ 生産終了| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $1.45 | $1.45 |
| 10 | $1.22 | $12.20 |
| 100 | $0.98 | $98.00 |
| 500 | $0.82 | $410.00 |
| 1,000 | $0.71 | $710.00 |
PCA82C251T-N3118 概要
A CAN transceiver (Controller Area Network transceiver) is a physical-layer IC that converts the digital transmit (TXD) and receive (RXD) signals of a CAN protocol controller into the differential CANH and CANL bus signals, and vice versa. Within the broader hierarchy, a CAN transceiver is a type of bus transceiver, which is a type of interface IC, which sits inside the Interface ICs category of integrated circuits. The PCA82C251 family targets 24 V automotive and industrial systems where high bus robustness and good electromagnetic compatibility are required.
Key features include a -27 V to +40 V bus fault tolerance on CANH/CANL, thermal shutdown protection, current limiting on the transmitter outputs, and a slope-control pin that lets the user programme the bus rise/fall time. The IC operates from a single 4.5 V to 5.5 V supply, draws a typical quiescent current of 16 mA in recessive mode, and survives automotive transients on the bus lines. The SOIC-8 plastic package offers a small PCB footprint with a standard 1.27 mm pin pitch.
Typical applications include 24 V truck and bus CAN nodes, industrial CANopen networks, agricultural and construction machinery, and any 12 V or 24 V CAN bus node requiring the classic PCA82C251 silicon. The PCA82C251 is the second-generation PCA82C250 follow-on and is widely second-sourced across the industry. Note that NXP has moved this part to NRND (Not Recommended for New Designs) - new designs should evaluate TJA1043, TJA1051, or TJA1042 for similar 24 V capability.
When designing with this part, place a 100 nF decoupling capacitor as close as possible to pin 8 (VCC) and follow the ISO 11898 bus termination of 120 Ω at each end of the bus. The slope-control resistor on pin 8 (Rs) must be chosen against the desired bit rate; for 1 MBaud operation NXP recommends tying Rs to ground, while for lower bit rates a larger resistor reduces EMI.
This page synthesises distributor stock, drop-in equivalents, and design guidance not found in the standalone datasheet PDF.
ドロップイン代替品: PCA82C251T-N3118 — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
クイック比較ツール — 並列比較する代替部品を選択:
PCA82C251T/N3,118
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PCA82C251T/N3,112
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PCA82C251T/YM,118
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TJA1042T/3,118
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TJA1051T/3,118
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SN65HVD251DR
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MCP2551-I/SN
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PCA82C251T-N3118 仕様
| Product Type | CAN Transceiver |
| Protocol | CAN 2.0A/B (ISO 11898-2 24 V) |
| Maximum Data Rate | 1 MBaud |
| Supply Voltage (VCC) | 4.5 V to 5.5 V |
| Bus Fault Tolerance (CANH/CANL) | -27 V to +40 V |
| 動作温度 | -40 C to +125 C |
| 熱シャットダウン | Yes |
| Current Limiting (TX Output) | Yes |
| Slope Control Pin (Rs) | Yes |
| パッケージ | SOIC-8 (D package) |
| Pin Pitch | 1.27 mm |
| 実装タイプ | Surface Mount |
| Lead-Free / RoHS | Yes (compliant per NXP product page) |
PCA82C251T-N3118 ピン構成
| ピン 1 | TXD — Transmit data input from CAN controller (CMOS/TTL) |
| ピン 2 | GND — Ground reference for VCC and digital I/O |
| ピン 3 | VCC — 5 V supply (4.5 V to 5.5 V) - place 100 nF decoupling locally |
| ピン 4 | RXD — Receive data output to CAN controller (CMOS/TTL) |
| ピン 5 | VREF — Reference voltage output (~0.5 x VCC) for CANH recessive biasing |
| ピン 6 | CANL — Bus low-side differential line; -27 V to +40 V fault tolerant |
| ピン 7 | CANH — Bus high-side differential line; -27 V to +40 V fault tolerant |
| ピン 8 | Rs — Slope control / standby mode input (tie to GND for max speed, raise for slower slew) |
主な用途
PCA82C251T-N3118 の用途: 6 件s: 24 V Truck and Bus CAN Networks, Industrial CANopen Automation Networks, Agricultural and Construction Machinery, CAN Bus Diagnostic and Service Tools, Battery Management System (BMS) Master-Controller Comms, Marine and Railway CAN Networks.
24 V Truck and Bus CAN Networks
The PCA82C251T/N3,118 was originally designed as the physical-layer CAN transceiver for heavy-duty 24 V truck and bus networks, and remains a classic second-source part for this application. Its -27 V to +40 V bus fault tolerance, per the NXP datasheet, easily survives load-dump and jump-start transients present on 24 V vehicle batteries. Used between a CAN protocol controller (such as an NXP SJA1000 or integrated MCU CAN module) and the differential CAN bus, the PCA82C251 provides 1 MBaud capability over the full ISO 11898-2 24 V specification. For modern fleet ECUs requiring long-term supply, designers should consider the TJA1042 or TJA1051 as the new NXP recommendation.
おすすめ
Industrial CANopen Automation Networks
In factory-automation and process-control cabinets the PCA82C251T/N3,118 is widely deployed as the bus transceiver for CANopen nodes running at 125 kBaud or 250 kBaud. The slope-control pin (Rs) of the 3 is set high to slow the bus edges and reduce EMI in cable bundles that share trays with motor drives and switching power supplies. ISO 11898-2 24 V compatibility lets the same transceiver operate in 24 V industrial backplanes where the bus is exposed to motor-brake regen transients. The SOIC-8 small footprint supports compact PLC and distributed I/O modules, while current-limiting and thermal shutdown add robustness in fan-less enclosures with limited airflow.
おすすめ
Agricultural and Construction Machinery
Tractors, harvesters, and excavators use 24 V CAN bus networks for engine control, hydraulic valve actuation, and GPS guidance, and the PCA82C251T/N3,118 has been a second-source transceiver across this segment. The -40 C to +125 C operating range per the NXP datasheet covers the cold-crank and under-hood thermal envelope of off-road equipment. The wide -27 V to +40 V bus fault tolerance handles jump-start events from a parallel 12 V battery used for starting diesel engines in cold weather. While NXP has flagged the part NRND, the mature silicon keeps it in service for aftermarket spares and long-life industrial machinery.
おすすめ
CAN Bus Diagnostic and Service Tools
Hand-held CAN scanners, J1939 protocol analysers, and truck diagnostic laptops frequently use the PCA82C251T/N3,118 as the bus-side transceiver because its 24 V robustness allows direct connection to truck and bus OBD-II ports without external protection circuitry. The /N3,118 tape-and-reel SOIC-8 variant is ideal for the small-form-factor PCBs inside these tools. Per the NXP datasheet, the high common-mode range of the receiver makes the part tolerant of ground-shift voltages present when the tool is connected to a chassis-grounded vehicle. Engineers building new designs should evaluate the TJA1042 for lower quiescent current and smaller package options.
おすすめ
Battery Management System (BMS) Master-Controller Comms
Within a 24 V battery management system the master controller often communicates to slave monitoring boards over an isolated CAN bus, and the PCA82C251T/N3,118 functions as the physical-layer transceiver on each side of the isolation barrier. The 5 V VCC pin is well-matched to typical MCU CAN controller supply rails, and the bus lines connect directly to a CAN-isolator (such as an isolated DC-DC plus digital isolator) without intermediate buffering. According to NXP datasheet, the receiver common-mode range covers the expected ground-offset of isolated nodes, simplifying layout of multi-battery-cell monitoring stacks.
おすすめ
Marine and Railway CAN Networks
Marine engine-control units, ship-bridge systems, and railway rolling-stock subsystems deploy 24 V CAN networks and have used the PCA82C251T/N3,118 as a second-source bus transceiver for over a decade. The -27 V to +40 V bus fault tolerance, per the NXP datasheet, absorbs the negative-voltage transients common when inductive DC loads (solenoids, motor brakes) are switched off in 24 V battery plants. Wide -40 C to +125 C operating temperature supports unheated exterior equipment enclosures. Long-life service requirements often keep the PCA82C251 in production for spares long after NXP transitions mainstream customers to the TJA family.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: PCA82C251T-N3118 — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | TJA1042T/3,118 | TJA1051T/3,118 | SN65HVD251DR | MCP2551-I/SN |
|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | Texas Instruments | Microchip Technology |
| Package | SOIC-8 (D) | SOIC-8 (D) - same | SOIC-8 (D) - same | SOIC-8 (D) - same | SOIC-8 (SN) - same |
| Maximum Data Rate | 1 MBaud | 1 MBaud | 1 MBaud | 1 MBaud | 1 MBaud |
| Supply Voltage (VCC) | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 3.0 V to 5.5 V | 4.5 V to 5.5 V |
| Bus Fault Tolerance | -27 V to +40 V | -27 V to +40 V | -27 V to +40 V | -27 V to +40 V | -40 V (transient, lower DC rating) |
| ISO 11898-2 Compliance | ISO 11898-2 (2003) | ISO 11898-2:2016 | ISO 11898-2:2016 | ISO 11898-2 (2003) | ISO 11898-2 (2003) |
| Slope Control Pin | Yes (Rs) | No (fixed slew, optimised internally) | No (fixed slew, optimised internally) | Yes (Rs) | Yes (Rs) |
| Lifecycle Status | NRND | Active | Active | Active | Active |
主な差別化要因
- Wide -27 V to +40 V bus fault tolerance, ideal for 24 V trucks and buses （vs TJA1050)
- Mature, industry-standard ISO 11898-2 silicon with wide second-source availability （vs TJA1042/TJA1051)
- Slope-control pin (Rs) for EMI management at low bus speeds （vs SN65HVD251)
設計ノート
Place a 100 nF ceramic decoupling capacitor (X7R, 16 V or higher) within 3 mm of pin 3 (VCC). For multi-transceiver boards, add a bulk 10 uF tantalum or aluminium-polymer capacitor shared across VCC rails to absorb bus-fault energy and reduce supply ringing. The PCA82C251 supplies quiescent current of [DATA_NEEDED: typical Iq recessive] in recessive state and rises sharply during dominant transmission - rail impedance must remain below ~1 ohm at 50 MHz to keep the VCC within 4.5 V to 5.5 V under all bus load events.
Route the CANH and CANL traces as a tightly coupled differential pair, ideally over a continuous ground plane, with characteristic impedance of 120 ohms (matching the bus termination). Keep the pair short and symmetric, and avoid routing near switching converters or digital clocks - the PCA82C251 has a high receiver sensitivity (~1 V common-mode range) but radiated EMI from nearby nets will degrade SNR at 1 MBaud. Add a TVS diode (such as SMBJ33CA) and PTC fuse on the bus connector to clamp -27 V to +40 V transients outside the IC's native tolerance.
Do not leave pin 8 (Rs) floating - tie it to GND for 1 MBaud operation or to VCC via 10 kohm to 100 kohm for lower slew rates. Floating Rs can put the IC into an undefined standby state. Also, the PCA82C251 is NRND: do not use it for new designs without a written waiver from NXP, and qualify the modern TJA1042 or TJA1051 for new platforms. Finally, never use the 12 V-rated TJA1050 as a drop-in for the PCA82C251 on 24 V buses - the TJA1050 has lower bus fault tolerance and will fail on 24 V jump-start events.
The PCA82C251 in SOIC-8 has a theta_JA of approximately 110 C/W. Worst-case power dissipation occurs during a sustained dominant bus short (transmitter current-limited at typically 100 mA) plus VCC current - at 5.5 V VCC and a continuous bus fault the IC can dissipate ~550 mW. Under normal 1 MBaud operation with 50% dominant duty, dissipation drops to roughly 200 mW. Estimated: at TA=85 C and 250 mW dissipation, junction temperature is 85 + 0.25 * 110 = 112.5 C - well within the 125 C limit, but adequate copper pour is recommended in enclosed industrial enclosures.
コンプライアンス情報
RoHS and lead-free per NXP product page. AEC-Q100 qualification status not explicitly stated for the standard PCA82C251T/N3 industrial part - the /YM automotive-grade variant is the AEC-Q100 qualified version. REACH and conflict-minerals compliance inferred from NXP corporate statements; specific declarations for this part are not in the verified data.
