MAX3051ESA+ - 3.3V 1Mbps CAN Transceiver SOIC-8 | Maxim
MPN: MAX3051ESA+ ✓ Hoạt độngMAX3051ESA+ Tóm tắt
A CAN transceiver is the physical-layer (OSI layer 1) interface between a digital CAN controller and the two-wire differential bus. It converts digital transmit/receive logic into differential voltages compliant with ISO 11898, while also providing bus-side ESD protection and common-mode tolerance. The MAX3051 belongs to the Maxim CAN transceiver family (3.3V, low-Iq) which sits inside the broader categories of LIN/CAN/FlexRay transceivers, interface ICs, and finally wired-connectivity semiconductors used in industrial automation, building control, and harsh-environment embedded networks.
Key features include a 1Mbps maximum data rate in high-speed mode, programmable slew-rate control for EMI-sensitive networks, and four operating modes: high-speed, slope-control, standby, and shutdown. The shutdown and standby states draw only a few hundred microamps, making the part well suited for battery-backed or sleep-cycling nodes. The bus-side common-mode range spans -7V to +12V, well beyond the ISO 11898 minimum of -2V to +7V, allowing reliable operation in electrically noisy industrial environments with large ground shifts.
The MAX3051 is fabricated on a low-power CMOS process with on-chip bus drivers that meet ISO 11898-2 physical-layer signaling. The wide common-mode window, combined with the part's ±6kV HBM ESD rating on the bus pins (per Maxim datasheet), enables robust operation in non-automotive harsh environments such as factory floor nodes, building automation backbones, and motor-drive gateways where ground-potential differences exceed ISO 11898 minimums.
Typical applications include industrial CAN nodes (PLC modules, sensor hubs), building-automation networks (BACnet over CAN, HVAC controllers), motor-drive CAN command links, embedded sensor networks, and any 3.3V MCU needing CAN connectivity without the cost or power of an automotive-grade transceiver. The low Iq also suits solar or battery-powered remote nodes.
When designing with the MAX3051ESA+, place 100nF supply-bypass capacitors as close as possible to VCC and route the CANH/CANL traces as a tightly-coupled 100-ohm differential pair with characteristic impedance of 120 ohms per ISO 11898. Always include a split-termination network (60 ohms + 4.7nF at each end) to suppress common-mode ringing in long stubs.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho MAX3051ESA+ — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với MAX3051ESA+ (cùng hình factor và footprint) — khác nhau ở Data Rate, Package, RoHS Status, Supply Voltage.
MAX3051ESA-T
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX3052ESA+
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
TLE7250-3GE
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
TCAN332GDR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX3051ESA+ Thông số kỹ thuật
| Chức năng | CAN Bus Transceiver |
| Number of Drivers/Receivers | 1/1 |
| Protocol | CANbus |
| Tốc độ dữ liệu | 1 Mbps (max, high-speed mode) |
| Điện áp cung cấp | 3.135 V to 3.465 V (3.3 V nominal) |
| Điện áp cung cấp | Low-supply-current design |
| Operating Modes | High-Speed, Slope-Control, Standby, Shutdown |
| Bus Common-Mode Range | -7 V to +12 V |
| ISO 11898 Compliance | Exceeds -2 V to +7 V minimum |
| Slew Rate Control | Programmable |
| Nhiệt độ hoạt động | -40 C to +85 C |
| Hộp | 8-pin SOIC (SO-8 narrow body) |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
| Lead-Free | Yes |
Cấu hình chân MAX3051ESA+
| Chân 1 | TXD — Transmit data input from CAN controller (CMOS 3.3V logic) |
| Chân 2 | GND — Ground reference for logic and bus |
| Chân 3 | VCC — +3.3V supply input (3.135V to 3.465V) |
| Chân 4 | RXD — Receive data output to CAN controller (CMOS 3.3V logic) |
| Chân 5 | SHDN — Shutdown input, active-low (drive high for normal operation) |
| Chân 6 | CANL — Low-side differential bus line |
| Chân 7 | CANH — High-side differential bus line |
| Chân 8 | RS — Slope-control / mode-select resistor to GND; sets high-speed, slope-control, standby, or shutdown mode |
Ứng dụng tiêu biểu
MAX3051ESA+ phù hợp cho 6 Áp dụngs: Industrial CAN Nodes (PLC, Sensor Hubs), Building Automation Backbones (BACnet, HVAC), Motor Drive CAN Command Links, Battery-Powered Remote Sensor Nodes, Embedded Sensor Networks (Agriculture, Logistics), Medical Device Inter-Board Communication.
Industrial CAN Nodes (PLC, Sensor Hubs)
The MAX3051ESA+ is well matched to industrial CAN nodes such as PLC digital-input modules and distributed sensor hubs that run from a 3.3V MCU. Its 1Mbps classical CAN data rate covers the typical 125kbps-1Mbps industrial CAN baud rates used in factory automation, while the wide bus common-mode range of -7V to +12V tolerates ground-potential differences across long factory-floor cable runs. Place the MAX3051 between the MCU's CAN controller (e.g., STM32 bxCAN or PIC32 CAN module) and the bus, with split termination (60R + 4.7nF) at each cable end.
Được đề xuất
Building Automation Backbones (BACnet, HVAC)
In building-automation networks using CAN-derived BACnet or proprietary HVAC buses, the MAX3051ESA+ provides a low-power physical interface for 3.3V thermostat and fan-coil controllers. The shutdown and standby modes draw only microamps, enabling sleep-cycling thermostats to conserve battery backup between transmissions. Its -40C to +85C industrial temperature grade suits unconditioned mechanical rooms, and the 1Mbps ceiling gives headroom for the 50-500kbps typical building-automation baud rates.
Được đề xuất
Motor Drive CAN Command Links
Variable-frequency drives and servo amplifiers use CAN for command/feedback links between the controller and the drive's gate-driver board. The MAX3051ESA+'s -7V to +12V common-mode tolerance survives the large dV/dt-induced ground shifts in the drive's switching power stage, while its 1Mbps rate comfortably handles the 250kbps-1Mbps typical motion-control bus. Use a twisted-pair cable with 120-ohm characteristic impedance and split termination at both ends.
Được đề xuất
Battery-Powered Remote Sensor Nodes
Solar- or battery-powered remote sensor nodes (environmental monitors, irrigation controllers, asset trackers) benefit from the MAX3051ESA+'s low-supply-current design and shutdown mode. The 3.3V operation matches Li-ion/LiFePO4 chemistries directly, eliminating boost converters, and the shutdown Iq in the microamp range allows duty-cycled wake/sleep CAN transmissions to extend battery life into the multi-year range.
Được đề xuất
Embedded Sensor Networks (Agriculture, Logistics)
Agricultural sensor networks and warehouse-logistics CAN nodes benefit from the MAX3051ESA+'s 3.3V single-supply operation, 1Mbps ceiling, and robust common-mode range that handles ground loops across long field cables. The wide operating temperature of -40C to +85C supports outdoor deployments, and the part's CMOS process keeps Iq low for solar-powered nodes. Pair with a 3.3V MCU that has a CAN controller and run at 125-500kbps for EMI-friendly long-cable performance.
Được đề xuất
Medical Device Inter-Board Communication
Non-patient-contact medical devices (lab analyzers, sterilizers, imaging peripherals) often use CAN between internal boards for reliable differential communication. The MAX3051ESA+ provides a 3.3V physical layer that matches modern medical MCUs, supports 1Mbps for high-throughput sensor data, and offers the wide common-mode tolerance needed across isolated board-to-board links. Its industrial temperature grade suits the controlled environments of laboratory and clinical equipment.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MAX3051ESA+ — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | MAX3051ESA-T | MAX3052ESA+ | TLE7250-3GE | TCAN332GDR |
|---|---|---|---|---|---|
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Infineon | Texas Instruments |
| Package | 8-pin SOIC (SO-8) | 8-pin SOIC (SO-8) - same | 8-pin SOIC (SO-8) - same | 8-pin SOIC (PG-DSO-8) - same | 8-pin SOIC (SO-8) - same |
| Supply Voltage | 3.135 V to 3.465 V | 3.135 V to 3.465 V | 3.135 V to 3.465 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V |
| Max Data Rate | 1 Mbps | 1 Mbps | 1 Mbps | 1 Mbps | 2 Mbps (CAN FD ready) |
| Bus Common-Mode Range | -7 V to +12 V | -7 V to +12 V | -12 V to +12 V (wider) | -12 V to +12 V | -12 V to +12 V |
| AEC-Q100 Qualified | No | No | No | Yes | Yes |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +150 C (Grade 1) | -40 C to +125 C |
| Slew-Rate Control | Programmable (RS pin) | Programmable (RS pin) | Programmable (RS pin) | Programmable (MODE pin) | Fixed (CAN FD optimized) |
| Shutdown / Standby Mode | Yes (SHDN pin) | Yes (SHDN pin) | Yes (SHDN pin) | Yes (STB pin) | Yes (S pin) |
Bảo phân biệt quan trọng
- Wide bus common-mode range without 5V supply (vsPCA82C250 (5V legacy CAN transceiver))
- Lower quiescent current than 5V CAN transceivers (vsTLE6251G (5V Infineon CAN))
- Simple four-mode operation via one RS pin (vsTCAN332GDR (TI CAN FD))
Ghi chú thiết kế
Route CANH and CANL as a tightly-coupled differential pair with 100-ohm differential impedance (120-ohm characteristic per ISO 11898) and match their lengths to within 5mm to minimize skew-induced EMI. Place a 100nF X7R bypass capacitor within 3mm of the VCC pin and a 4.7uF bulk capacitor nearby. Keep the bus traces away from switching converter edges and from the MCU's high-speed clock lines by at least 3W (where W is the trace-to-trace spacing).
Do not exceed 3.465V on VCC - the MAX3051ESA+ is a 3.3V-only part and will be damaged by a 5V rail. If your MCU is 5V, level-shift TXD/RXD or choose a 5V-tolerant CAN transceiver instead. Also ensure SHDN is tied high (or left floating only if internal pull-up is documented - per Maxim datasheet, drive it high) so the part does not enter shutdown unexpectedly at power-up.
Use split termination at each end of the bus: two 60-ohm resistors in series with a 4.7nF-100nF capacitor to ground at the midpoint. This suppresses common-mode ringing on long stubs and unterminated cable branches. For multi-drop CAN networks, place the termination only at the physical ends of the trunk - never at stub nodes - and keep stub lengths shorter than the bit-time allows (rule of thumb: stub < 0.3 m at 1 Mbps).
Estimated: at 1Mbps with a 10m cable and standard ISO 11898 termination, the differential edge rate is roughly 15-20ns. The MAX3051's programmable slew rate via the RS pin lets you trade edge speed for lower EMI - a 10kohm RS resistor typically yields ~1.5V/us suitable for cable lengths above 50m, while 0-ohm to GND enables the full 1Mbps high-speed mode. Verify by observing CANH/CANL eye on an oscilloscope against the ISO 11898-2 mask.
The MAX3051ESA+ in SOIC-8 has a typical theta_JA of ~150 C/W on a 4-layer JEDEC test board. Maximum supply current is in the tens of mA during dominant transmission, so power dissipation stays well below 200mW and self-heating is negligible - no heatsink or thermal relief copper pour is required for normal operation. If the part is operated in a sealed enclosure above +85C ambient, validate with a thermocouple.
Thông tin tuân thủ
RoHS and lead-free per Maxim product page; industrial -40C to +85C grade only - NOT AEC-Q100 qualified. For automotive use, choose AEC-Q100-qualified 3.3V CAN transceivers such as TLE7250-3GE (Infineon) or TCAN332G (TI).
