SIT1044T - 5Mbps CAN FD Transceiver, SOP-8 | SIT
MPN: SIT1044T ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.28 | $0.28 |
| 10 | $0.25 | $2.50 |
| 100 | $0.2241 | $22.41 |
| 500 | $0.19 | $95.00 |
| 1,000 | $0.16 | $160.00 |
SIT1044T Overview
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.
Drop-in alternatives for SIT1044T — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with SIT1044T (same form factor and footprint) — differing in Package, Bus Fault Protection, Protocol, Low-Power Mode, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
SIT1044T/3
✅ Drop-In📋 Reference alternative (not in catalog)
SIT1044TK/3
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$0.184 / Unit
View Datasheet →TJA1044T/3
✅ Drop-In📋 Reference alternative (not in catalog)
MCP2562FD-E/SN
✅ Drop-In✓ In Stock
$0.62 / Unit
View Datasheet →SN65HVD256
✅ Drop-In📋 Reference alternative (not in catalog)
MAX13041
✅ Drop-In📋 Reference alternative (not in catalog)
SIT1044T Specifications
| 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 |
| Operating Temperature | -40 °C to +125 °C |
| Package | SOP-8 |
| Low-Power Mode | Yes (standby with wake-up) |
| Wake-up Pin | Yes |
| TXD Dominant Time-out | Yes |
| Thermal Shutdown | Yes |
| Undervoltage Protection | Yes |
| RoHS | Compliant |
SIT1044T Pin Configuration
| Pin 1 | TXD — Transmit data input from MCU (3.3V or 5V logic) |
| Pin 2 | GND — Ground reference |
| Pin 3 | VCC — 5 V supply input (4.75 V to 5.25 V) |
| Pin 4 | RXD — Receive data output to MCU (3.3V or 5V logic) |
| Pin 5 | VIO/VREF — Reference / logic-level supply; tie to MCU VDD for 3.3V logic |
| Pin 6 | CANL — Low-level CAN bus line (differential) |
| Pin 7 | CANH — High-level CAN bus line (differential) |
| Pin 8 | WAKE/STB — Wake-up input (rising edge) / standby mode control |
Typical Applications
SIT1044T is suitable for 6 applications: 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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
Recommended Products Summary
Engineering reference data for SIT1044T — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | 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 |
Key Differentiators
- Lowest unit cost among ISO 11898-2:2016 CAN FD transceivers in SOP-8 (vs TJA1044T/3)
- Lower standby current than most cross-brand equivalents (vs SN65HVD256)
- Dedicated WAKE pin enables bus wake-up without host MCU involvement (vs MCP2562)
Design Notes
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.
Compliance Information
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).
