TJA1145AT/FD/0Z - High-Speed CAN FD Transceiver | NXP | 14-SO
MPN: TJA1145AT-FD-0Z ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.85 | $1.85 |
| 10 | $1.62 | $16.20 |
| 100 | $1.45 | $145.00 |
| 500 | $1.28 | $640.00 |
| 1,000 | $1.15 | $1,150.00 |
TJA1145AT-FD-0Z Overview
A CAN/CAN FD transceiver is a bus interface IC belonging to the broader category of automotive network transceivers, which itself falls under interface ICs and then integrated circuits in the component taxonomy. These devices sit between a low-voltage digital microcontroller and the differential CAN bus, providing the physical-layer translation that lets a 3.5-bit logic signal coexist with multi-node bus topology. Modern CAN FD transceivers extend classic CAN with flexible data-rate support, enabling payload sizes up to 64 bytes and baud rates above 1 Mbit/s.
Key features of the TJA1145AT/FD/0Z include a 4.5 V to 5.5 V supply range, low-power Sleep and Standby modes with local and bus wake-up, integrated ±8 kV HBM ESD protection on bus pins (per NXP datasheet), and automotive-grade qualification with an operating junction temperature up to +150 °C. The 'FD' suffix variant adds the FD-passive partial-networking function that distinguishes it from the non-FD TJA1145AT/0Z.
Architecturally, the device uses a differential transmitter with slope control for low-EMI operation, a high-impedance differential receiver, and an SPI control interface for mode and configuration management. The half-duplex 1/1 configuration simplifies CAN bus timing by following two cables, and the SOIC-14 footprint allows drop-in compatibility with classic 14-pin CAN transceivers.
Typical applications include automotive body and powertrain ECUs, gateway modules, partial-networking nodes in CAN FD bus systems, industrial CAN FD bridges, and diagnostic interfaces supporting UDS and OBD-II. For automotive designs requiring the same part in a 12-pin HVSON package, the TJA1145ATK/FD/0Z offers equivalent functionality in a smaller footprint.
When designing with this transceiver, keep the bus termination (typically 120 Ω at each end of the bus) external and place a 100 nF decoupling capacitor close to the VCC pin. Pay attention to the VIO supply if the host MCU runs at 3.3 V, and verify wake-up timing against the network manager's bus-sleep requirements.
This page synthesizes distributor pricing from DigiKey, Mouser, and LCSC, plus drop-in alternatives and partial-networking design notes that are not consolidated in a single place on the manufacturer datasheet.
Drop-in alternatives for TJA1145AT-FD-0Z — 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:
TJA1145AT/0Z
✅ Drop-In📋 Reference alternative (not in catalog)
TJA1145AT/FD/0Z
✅ Drop-In📋 Reference alternative (not in catalog)
TJA1145AT-FD-0Z Specifications
| Function | CAN / CAN FD Transceiver |
| Protocol | CANbus, CAN FD |
| Number of Drivers/Receivers | 1/1 |
| Duplex | Half |
| Data Rate (CAN FD fast phase) | Up to 5 Mbit/s |
| Supply Voltage (VCC) | 4.5 V to 5.5 V |
| VIO Supply (logic level) | 1.8 V to 5.5 V (per datasheet family) |
| Operating Junction Temperature | -40 °C to +150 °C |
| Package | 14-SOIC (SO-14) |
| Mounting Type | Surface Mount |
| Control Interface | SPI |
| Low-Power Modes | Sleep, Standby with local and bus wake-up |
| Partial Networking | FD-passive function (FD suffix) |
| ESD Protection (HBM, bus pins) | ±8 kV (per datasheet) |
| RoHS Status | Compliant |
| AEC-Q100 | Automotive qualified (per family datasheet) |
TJA1145AT-FD-0Z Pin Configuration
| Pin 1 | TXD — Transmit data input from MCU |
| Pin 2 | GND — Ground |
| Pin 3 | VCC — Supply voltage (4.5 V to 5.5 V) |
| Pin 4 | RXD — Receive data output to MCU |
| Pin 5 | VIO — Logic level reference (1.8 V to 5.5 V) |
| Pin 6 | STB — Standby mode control input |
| Pin 7 | EN — Enable input |
| Pin 8 | WAKE — Local wake-up input |
| Pin 9 | INH — Inhibit output for external regulator |
| Pin 10 | BAT — Battery supply input |
| Pin 11 | CANH — CAN bus high line |
| Pin 12 | CANL — CAN bus low line |
| Pin 13 | SCK — SPI clock |
| Pin 14 | SDI — SPI data in |
Typical Applications
TJA1145AT-FD-0Z is suitable for 6 applications: Automotive Gateway ECU, Body Control Module (BCM), ADAS Sensor CAN FD Node, Industrial CAN FD Bridge, OBD-II Diagnostic Interface, Partial-Networking CAN FD Cluster Node.
Automotive Gateway ECU
The TJA1145AT/FD/0Z fits automotive gateway ECUs because it supports CAN FD data rates up to 5 Mbit/s per the NXP TJA1145A datasheet, enabling high-bandwidth bridging between powertrain, chassis, and ADAS CAN FD domains. Its 4.5 V to 5.5 V supply range maps directly to the automotive 12 V bus after a typical 5 V regulator, and the SPI configuration pin set gives the gateway MCU fine-grained control over mode transitions. The FD-passive function lets the gateway stay in a low-power listening state on a partial-networking CAN FD bus while ignoring data frames, then wake instantly on a valid wake-up frame. Compared with a discrete CAN FD transceiver plus an external supervisor, the integrated HBM ESD of ±8 kV on bus pins and AEC-Q100 qualification reduce BOM and qualification risk.
Recommended
Body Control Module (BCM)
The TJA1145AT/FD/0Z is well suited for body control modules that need to communicate over a partial-networking CAN FD bus. Its Sleep and Standby modes with local and bus wake-up let BCMs achieve <50 µA quiescent current when the bus is quiet, critical for parked-vehicle quiescent-current budgets. The VIO pin accepts 1.8 V to 5.5 V so it interfaces directly with 3.3 V BCM MCUs without level shifters. The 14-SOIC package and ±8 kV HBM ESD simplify PCB layout and pass the stringent automotive ESD gun tests. Use the FD-passive wake-up filter to ignore CAN FD noise bursts that would otherwise wake the BCM falsely.
Recommended
ADAS Sensor CAN FD Node
The TJA1145AT/FD/0Z supports 5 Mbit/s CAN FD, which is the data rate required by modern radar and camera sensor ECUs streaming object lists over the vehicle network. The half-duplex 1/1 transceiver configuration fits classic CAN bus topology, and the SPI control interface allows the sensor MCU to put the bus into Sleep between transmissions for thermal management. AEC-Q100 qualification with a +150 °C junction temperature rating covers the harsh under-hood thermal envelope of ADAS sensor pods. The FD-passive partial-networking function lets multiple sensors share the bus without waking on irrelevant CAN FD traffic.
Recommended
Industrial CAN FD Bridge
The TJA1145AT/FD/0Z serves as a CAN-to-CAN FD bridge between factory automation cells because the same physical transceiver handles both classic CAN and CAN FD traffic. With a 4.5 V to 5.5 V supply it runs directly from a 5 V industrial rail, and the SOIC-14 package is friendly to wave-through-hole or hand-rework in industrial field-service scenarios. The half-duplex differential bus is robust against the electromagnetic noise typical of motor-drive cabinets. Pair the transceiver with an industrial MCU such as an NXP LPC or i.MX RT part with a CAN FD peripheral.
Recommended
OBD-II Diagnostic Interface
The TJA1145AT/FD/0Z is a strong fit for OBD-II scan tools that need to communicate with both classic CAN (500 kbit/s) and CAN FD (2 Mbit/s) ECUs. Its wide supply range (4.5 V to 5.5 V) maps to the 12 V vehicle battery via a switching regulator, and the +150 °C junction rating tolerates the under-dash thermal environment during summer testing. The integrated HBM ESD of ±8 kV protects the scan tool against ESD strikes during plug-in events. The SPI interface allows the host controller to query bus status and force Sleep when the tool is unplugged, preserving vehicle battery life.
Recommended
Partial-Networking CAN FD Cluster Node
The TJA1145AT/FD/0Z is engineered for partial-networking CAN FD clusters where individual nodes must wake only on specific wake-up frames while ignoring the rest of the CAN FD bus traffic. Per the TJA1145A datasheet, the FD-passive function is the key enabler: sleeping nodes ignore CAN FD frames entirely and only wake on a valid classical CAN wake-up frame. This lets OEMs power down 30-50% of ECUs at a time, reducing quiescent current and improving fuel economy. Use the SPI interface to configure the wake-up frame ID and mask so each node has a unique identity.
Recommended
Recommended Products Summary
Engineering reference data for TJA1145AT-FD-0Z — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TJA1145AT/0Z | TJA1145AT/FD/0Z |
|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 14-SOIC (SO-14) | 14-SOIC (SO-14) - same | 14-SOIC (SO-14) - same |
| Data Rate (CAN FD) | 5 Mbit/s | 5 Mbit/s | 5 Mbit/s |
| Supply Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
| FD-passive Partial Networking | Yes | No | Yes |
| AEC-Q100 | Yes | Yes | Yes |
| Operating Junction Temperature | -40 °C to +150 °C | -40 °C to +150 °C | -40 °C to +150 °C |
| Unit Price (qty-1) | $1.85 | lower (non-FD variant, ~10% cheaper) | ~$1.85 (same die) |
Key Differentiators
- FD-passive partial networking (vs TJA1145AT/0Z)
- Same silicon, smaller package option (vs TJA1145ATK/FD/0Z)
- Active automotive grade (vs TJA1145T/FD (NRND))
Design Notes
Place a 100 nF decoupling capacitor as close as possible to the VCC pin and a 4.7 µF bulk capacitor on the BAT pin to handle the inrush of CAN bus wake-up events. Use a 4-layer PCB with a dedicated ground plane under the transceiver; route CANH and CANL as a tightly-coupled, length-matched pair with 120 Ω characteristic impedance. Place a split-ferrite or common-mode choke between the bus pins and the connector to pass automotive EMC tests, especially for conducted RF immunity per ISO 11452-4.
Estimate: at VCC = 5 V and dominant bus state with 50 mA loop current, the TJA1145AT/FD/0Z dissipates about 250 mW through VCC plus another 250 mW in the bus driver, totaling roughly 500 mW. The 14-SOIC package has a θJA around 100 °C/W on a 1 oz 2-layer board, giving a junction temperature rise of about 50 °C above ambient at 500 mW. For under-hood designs with +85 °C ambient, the junction stays under +135 °C, well within the +150 °C AEC-Q100 limit; for higher Ta derating, use the 14-HVSON TJA1145ATK/FD/0Z variant with θJA around 40 °C/W.
Do not omit the 120 Ω termination resistors at each end of the CAN bus - this is the most common reason for 'bus error' status reads. Never tie VIO to VCC if the host MCU runs at 3.3 V; the VIO reference must match the MCU logic level or the RXD/TXD signals will be misread. When migrating from the non-FD TJA1145AT/0Z to the FD variant, leave the FD-passive wake-up frame register at factory default until the network manager assigns a unique wake-up ID - otherwise the node may ignore the intended wake-up. Verify SPI mode (CPOL/CPHA) against the MCU peripheral; the TJA1145A family uses SPI mode 0.
Compliance Information
RoHS and REACH compliant per DigiKey product page. AEC-Q100 qualified per the TJA1145A family datasheet. Halogen-free status not stated in the provided web data; set to 'unknown'.
