SIT1044T - 5Mbps CAN FD Transceiver, SOP-8 | SIT
MPN: SIT1044T ✓ Hoạt độngSIT1044T Tóm tắt
A CAN transceiver is a physical-layer interface IC that translates the single-ended TXD/RXD logic signals from a microcontroller into the differential CANH/CANL bus voltages required by the CAN protocol, while also providing ESD protection, common-mode voltage tolerance and bus dominant-timeout safeguards. CAN transceivers sit between the protocol controller (often integrated in an MCU) and the twisted-pair CAN bus, forming the bridge between the application’s digital logic and the in-vehicle or industrial network. The SIT1044T belongs to the high-speed CAN physical-layer family, sitting hierarchically as: CAN transceiver → CAN physical-layer IC → Interface IC → Integrated Circuit.
Key specifications include ±40 V bus fault protection on CANH and CANL, ±8 kV HBM ESD on bus pins (per the manufacturer datasheet), an operating temperature range of -40 °C to +125 °C, transmitter dominant time-out, thermal shutdown, and under-voltage protection on VCC. The receiver offers high input impedance and a wide common-mode range, while the transmitter delivers a tightly matched differential output to minimise EMI on the bus.
Architecture-wise, the SIT1044T uses a bipolar-CMOS-DMOS mixed process that allows ±40 V bus tolerance with low quiescent draw. Internal slope-control circuitry adjusts the CANH/CANL edge rate to suppress EMI without sacrificing the 5 Mbps data rate demanded by CAN FD payloads.
Typical applications include automotive body electronics (BCM, door modules, seat controllers), industrial CAN nodes (PLCs, servo drives, sensors), CAN-to-UART gateways, and BMS (Battery Management System) slave nodes in 12 V/24 V systems. The WAKE pin and low-power standby mode make it suitable for CAN partial networking and always-on ECUs.
When designing with the SIT1044T, place a 100 nF ceramic bypass capacitor close to VCC (pin 8) and follow the manufacturer’s reference layout for the split-termination network (typically 60 Ω with two 10 nF capacitors to ground) on the bus to meet IEC 62228-3 / SAE J2962-2 EMC requirements. A common-mode choke is recommended for highly noisy environments.
This page synthesises distributor pricing, drop-in alternative cross-references and practical design notes not found in the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho SIT1044T — 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 SIT1044T (cùng hình factor và footprint) — khác nhau ở Package, Bus Fault Protection, Protocol, Low-Power Mode, Operating Temperature.
SIT1044T/3
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
SIT1044TK/3
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →TJA1044T/3
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MCP2562FD-E/SN
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →SN65HVD256
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX13041
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
SIT1044T Thông số kỹ thuật
| Product Type | CAN FD Transceiver |
| Protocol Standard | ISO 11898-2:2016 (high-speed CAN) |
| Maximum Data Rate | 5 Mbps (CAN FD) |
| Supply Voltage (VCC) | 4.75 V to 5.25 V |
| Supply Current (Dominant, typical) | 70 mA |
| Supply Current (Standby) | 30 µA |
| Bus Fault Protection | ±40 V on CANH/CANL |
| ESD Protection (HBM, bus pins) | ±8 kV |
| Nhiệt độ hoạt động | -40 °C to +125 °C |
| Hộp | SOP-8 |
| Low-Power Mode | Yes (standby with wake-up) |
| Wake-up Pin | Yes |
| TXD Dominant Time-out | Yes |
| Tắt nhiệt | Yes |
| Undervoltage Protection | Yes |
| RoHS | Compliant |
Cấu hình chân SIT1044T
| Chân 1 | TXD — Transmit data input from MCU (3.3V or 5V logic) |
| Chân 2 | GND — Ground reference |
| Chân 3 | VCC — 5 V supply input (4.75 V to 5.25 V) |
| Chân 4 | RXD — Receive data output to MCU (3.3V or 5V logic) |
| Chân 5 | VIO/VREF — Reference / logic-level supply; tie to MCU VDD for 3.3V logic |
| Chân 6 | CANL — Low-level CAN bus line (differential) |
| Chân 7 | CANH — High-level CAN bus line (differential) |
| Chân 8 | WAKE/STB — Wake-up input (rising edge) / standby mode control |
Ứng dụng tiêu biểu
SIT1044T phù hợp cho 6 Áp dụngs: Automotive Body Control Module (BCM), Industrial PLC CAN Module, Battery Management System (BMS) Slave Node, Servo Drive and Motor Controller, CAN-to-UART Gateway, Agricultural and Off-Highway Vehicle Networks.
Automotive Body Control Module (BCM)
The SIT1044T serves as the CAN physical-layer interface between an automotive MCU and the vehicle's 500 kbps / 2 Mbps CAN FD body bus, providing ISO 11898-2:2016-compliant differential signalling with ±40 V bus fault tolerance for 12 V jump-start and reverse-battery events. Its 70 mA dominant-mode supply current and 30 µA standby current make it a strong fit for BCMs that must stay partially networked when the ignition is off. Used alongside a 5 V automotive MCU such as the NXP S32K1 series and a 12 V SBC, the SIT1044T delivers robust bus fault and ±8 kV HBM ESD protection on CANH/CANL, simplifying the discrete protection network around the bus pins.
Được đề xuất
Industrial PLC CAN Module
In a PLC or industrial controller with a CANopen or CANopen FD fieldbus, the SIT1044T provides the differential bus driver/receiver that connects the controller's CAN peripheral to the fieldbus cable. The device's -40 °C to +125 °C operating range and ±40 V bus tolerance make it suitable for 24 V industrial cabinets where inductive kickback is common, and its 5 Mbps capability allows CANopen FD upgrades on existing 1 Mbps CANopen installations without re-spinning the physical layer. It pairs naturally with an STM32F4 or PIC32MX275 MCU running a CANopen stack on top of the integrated CAN FD peripheral.
Được đề xuất
Battery Management System (BMS) Slave Node
Within a distributed BMS, the SIT1044T acts as the CAN FD physical layer for each cell-monitoring slave board that daisy-chains along the battery pack's twisted-pair CAN bus. Its 30 µA standby current and dedicated WAKE pin support partial-networking wake-up of the slave over the bus, while ±40 V bus fault protection tolerates ground-shift transients in 12 V and 24 V pack architectures. Pair the SIT1044T with a low-power MCU such as the LTC6811-1 cell monitor stack or a simple 5 V Cortex-M0+ with on-chip CAN FD to keep each slave's quiescent draw within the BMS thermal budget.
Được đề xuất
Servo Drive and Motor Controller
Servo drives and brushless-DC motor controllers use the SIT1044T as the CAN FD physical layer for command-and-feedback traffic with an upstream PLC or motion controller at 1-5 Mbps. The transceiver's tight CANH/CANL edge-rate control reduces EMI that could otherwise couple into nearby power-stage gate drives, and its thermal-shutdown protection guards the bus interface during sustained bus faults. The SIT1044T drops into standard CiA 402 / CiA 402-2 servo reference designs alongside gate-driver ICs and resolver-to-digital converters.
Được đề xuất
CAN-to-UART Gateway
In a CAN-to-UART gateway module, the SIT1044T converts the differential CAN FD bus voltages to 3.3 V / 5 V logic on the TXD/RXD pins of a small MCU that re-publishes the traffic over an RS-232/RS-485 or USB port. The device's 5 Mbps CAN FD capability preserves CAN FD payload bandwidth end-to-end, while ±8 kV HBM ESD on the bus pins protects the gateway from field-injected transients on the CAN connector. Combined with a small Cortex-M0+ such as the STM32G0 series, the SIT1044T enables a low-BOM-count industrial diagnostic bridge.
Được đề xuất
Agricultural and Off-Highway Vehicle Networks
Off-highway and agricultural vehicles (tractors, harvesters, sprayers) use ISO 11783 / ISOBUS CAN networks, and the SIT1044T provides the physical layer with ±40 V bus fault protection needed to survive load-dump and jump-start events on 24 V battery systems. Its -40 °C to +125 °C operating range handles under-hood temperatures, and the WAKE pin enables partial-networking ECUs that must wake on bus traffic for telematics and diagnostics. The SIT1044T fits cleanly alongside 24 V-tolerant SBCs and CAN-controlled hydraulic remote-valve drivers in ISOBUS implement nodes.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho SIT1044T — 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 | SIT1044T/3 | SIT1044TK/3 | TJA1044T/3 | MCP2562 | SN65HVD256 | MAX13041 |
|---|---|---|---|---|---|---|---|
| Package | SOP-8 | SOP-8 - same | SOP-8 - same | SOP-8 - same | SOP-8 - same | SOP-8 - same | SOP-8 - same |
| Brand | SIT | SIT | SIT | NXP Semiconductors | Microchip Technology | Texas Instruments | Analog Devices |
| ISO 11898-2 Compliance | ISO 11898-2:2016 | ISO 11898-2:2016 | ISO 11898-2:2016 | ISO 11898-2:2016 | ISO 11898-2 | ||
| Maximum Data Rate | 5 Mbps | 5 Mbps | 5 Mbps | 5 Mbps | 5 Mbps | ||
| Bus Fault Protection | ±40 V | ±42 V | ±40 V | ±36 V | ±14 V | ||
| Standby Current (typ) | 30 µA | 15 µA | 20 µA typical standby | 200 µA sleep | 180 µA | ||
| Dominant Supply Current (typ) | 70 mA | 70 mA | 70 mA | 60 mA | 60 mA | ||
| Operating Temperature | -40 °C to +125 °C | -40 °C to +150 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | ||
| Wake-up Pin | Yes | Yes | No (S pin only) | No (S pin only) | No | ||
| Approx. Unit Price (qty 100) | $0.22 | $0.45 | $0.95 | $1.40 | $2.20 |
Bảo phân biệt quan trọng
- Lowest unit cost among ISO 11898-2:2016 CAN FD transceivers in SOP-8 (vsTJA1044T/3)
- Lower standby current than most cross-brand equivalents (vsSN65HVD256)
- Dedicated WAKE pin enables bus wake-up without host MCU involvement (vsMCP2562)
Ghi chú thiết kế
Place a 100 nF X7R ceramic bypass capacitor within 2 mm of the SIT1044T VCC pin (pin 3), plus a 4.7 µF bulk capacitor on the same node. Use a 4-layer PCB with a continuous ground plane beneath the device and route CANH and CANL as a 120 Ω-impedance differential pair, length-matched to within 2 mm. Connect the exposed pad (if any in the SOP-8 thermal slug variant) to the ground plane with at least four thermal vias to keep the die below 100 °C under worst-case ±40 V bus fault stress.
Use a split-termination network of two 60 Ω resistors in series with the bus, with a 10 nF (or 100 pF for higher-speed CAN FD) capacitor from the midpoint to ground. This suppresses common-mode noise and reduces radiated emissions per IEC 62228-3. For very long stubs or unshielded cables, add a common-mode choke rated for 100 mA continuous current in series with the CANH/CANL lines. Keep the stub length from the IC to the bus less than one-tenth of the bus one-bit length at 5 Mbps (about 4 mm FR-4).
Estimated: total unpowered load on VCC ≈ 30 µA standby + MCU quiescent; verify your MCU's sleep current before claiming CAN partial-networking at 50 µA system level. Do not leave the WAKE pin floating - if unused, tie it to GND through a 10 kΩ resistor to prevent false wake-up events on noisy supplies. The TXD dominant time-out is typically 1.2 ms; if your application sends intentionally long dominant states, drive STB high to disable the time-out. Reverse-battery and load-dump protection still require external TVS diodes on the bus pins for full OEM compliance.
Thông tin tuân thủ
RoHS compliant per LCSC and JLCPCB listings. AEC-Q100 status is not stated in the verified web data for the standard SIT1044T - for AEC-Q100 requirements choose the TJA1044T/3 (NXP).
