TJA1052IT-1Y - Galvanically Isolated HS CAN Transceiver | NXP
MPN: TJA1052IT-1Y ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.98 | $2.98 |
| 10 | $2.74 | $27.40 |
| 100 | $2.31 | $231.00 |
| 500 | $2.05 | $1,025.00 |
| 1,000 | $1.84 | $1,840.00 |
| 2,500 | $1.65 | $4,125.00 |
TJA1052IT-1Y Overview
A CAN transceiver is the physical-layer bridge inside an in-vehicle network: it converts the differential logic-level signals from a CAN controller (TXD, RXD) into the bus-side differential voltage on the CANH and CANL lines that meet ISO 11898-2/-5, while protecting the host controller from bus-level transients. The TJA1052i family adds integrated digital isolation (typically using on-chip coreless transformer technology) to that bridge, replacing a two-chip solution (isolator + transceiver) with a single component and simplifying PCB layout while improving common-mode transient immunity (CMTI) in motor-drive environments.
Key features include ISO 11898-2/-5 compliant high-speed CAN data rates up to 1 Mbit/s, integrated galvanic isolation rated for 1 kV (digital isolator channel rating per the part classification), tight loop delay for time-triggered CAN (TTCAN) operation, and integrated bus-side protection for harsh automotive electrical environments. The TJA1052i is designed to operate over the full automotive temperature range and supports low-power standby modes for battery-friendly quiescent current draw when the bus is silent.
The architecture uses NXP's high-speed CAN transceiver core combined with on-chip galvanic isolation cells, removing the need for external optocouplers or digital isolator ICs while providing the same reinforced isolation barrier between the CAN controller domain and the bus domain. This two-domain split is essential in EV/HEV powertrain ECUs where the bus may sit on a high-voltage referenced plane.
Typical applications include EV and HEV battery management system (BMS) CAN nodes, onboard chargers, DC-DC converter telemetry, electric power steering (EPS) communication links, and industrial CAN-isolated gateways that must bridge different ground domains. Designers use the TJA1052IT-1Y where ISO 11898 bus timing must be preserved across an isolation barrier without adding a discrete isolator stage.
A key design consideration is that the bus-side and logic-side grounds must remain galvanically separate; do not bypass the isolation by shorting the two ground planes. Also confirm the 1 kV channel rating meets the end-application's reinforced or basic isolation requirement before reuse in higher-voltage systems.
This page synthesizes the NXP datasheet, current distributor pricing, and a curated set of drop-in alternatives that share the same SO-16 footprint - content not aggregated on any single manufacturer or distributor page.
Drop-in alternatives for TJA1052IT-1Y — 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 TJA1052IT-1Y (same form factor and footprint) — differing in Bus Fault Protection, Isolation Voltage, Operating Temperature, Protocol.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TJA1052IT/5Y
✅ Drop-In📋 Reference alternative (not in catalog)
TJA1052IT/2Y
✅ Drop-In📋 Reference alternative (not in catalog)
TJA1052IT/3Y
✅ Drop-In📋 Reference alternative (not in catalog)
ISO1042DW
✅ Drop-In📋 Reference alternative (not in catalog)
ISO1042BDW
✅ Drop-In✓ In Stock
$2.55 / Unit
View Datasheet →ISO1042QDWEVM-compatible-ISO1042QDW
✅ Drop-In📋 Reference alternative (not in catalog)
TJA1052IT-1Y Specifications
| Function | Galvanically isolated high-speed CAN transceiver |
| Data Rate (max) | 1 Mbit/s |
| Standards Compliance | ISO 11898-2, ISO 11898-5 |
| Number of Channels | 2 (TXD / RXD across isolation) |
| Isolation Voltage | 1 kV (channel rating) |
| Operating Temperature | -40 C to +125 C (automotive) |
| Package / Case | 16-SOIC (SOT-109 / SO-16) |
| Mounting Type | Surface Mount |
| Target Application | Electric Vehicle (EV), Hybrid Electric Vehicle (HEV) |
| Protocol | CAN 2.0A, CAN 2.0B |
| Duplex | Half |
| Receiver Hysteresis | Yes (per ISO 11898-2/-5) |
| Bus Fault Protection | -27 V to +40 V on CANH/CANL (typical for the family) |
| RoHS Status | Compliant |
| Lead Free | Yes |
TJA1052IT-1Y Pin Configuration
| Pin 1 | VCC1 — Logic-side supply voltage |
| Pin 2 | TXD — Transmit data input (logic side, to controller) |
| Pin 3 | NC — Not connected (per datasheet) |
| Pin 4 | GND1 — Logic-side ground reference |
| Pin 5 | RXD — Receive data output (logic side, to controller) |
| Pin 6 | NC — Not connected (per datasheet) |
| Pin 7 | STB — Standby mode control input (logic side) |
| Pin 8 | NC — Not connected (per datasheet) |
| Pin 9 | GND2 — Bus-side ground reference (galvanically isolated from GND1) |
| Pin 10 | NC — Not connected (per datasheet) |
| Pin 11 | VCC2 — Bus-side supply voltage |
| Pin 12 | CANL — CAN low-level bus line |
| Pin 13 | CANH — CAN high-level bus line |
| Pin 14 | NC — Not connected (per datasheet) |
| Pin 15 | NC — Not connected (per datasheet) |
| Pin 16 | NC — Not connected (per datasheet) |
Typical Applications
TJA1052IT-1Y is suitable for 6 applications: EV/HEV Battery Management System (BMS) CAN Nodes, Onboard Charger (OBC) Communications, DC-DC Converter Telemetry, Electric Power Steering (EPS) Communication Link, Industrial Isolated CAN Gateways, Charging Infrastructure & Off-Board DC Fast Chargers.
EV/HEV Battery Management System (BMS) CAN Nodes
The TJA1052IT-1Y's integrated galvanic isolation bridges the high-voltage traction-side battery domain and the low-voltage ECU domain that typically houses the BMS master controller. Its ISO 11898-2/-5 compliance delivers up to 1 Mbit/s high-speed CAN, while the on-chip isolation removes the extra isolator stage that would otherwise sit in series with the CAN PHY. Battery modules distributed across a pack benefit from reliable ground isolation between each cell-monitoring board, and the TJA1052IT-1Y's wide operating temperature envelope supports underhood and pack-mounted placements.
Recommended
Onboard Charger (OBC) Communications
Onboard chargers sit between the AC mains domain and the high-voltage DC bus, so the CAN link to the vehicle's central control unit must cross an isolation barrier. The TJA1052IT-1Y provides the 1 kV channel-level isolation, supports 1 Mbit/s high-speed CAN signalling, and preserves loop delay so time-triggered powertrain coordination stays deterministic. Designers pair it with main MCU + PFC + LLC controllers on the OBC board, using the part's wide supply tolerance to ride out inverter-induced transients on the bus-side rail.
Recommended
DC-DC Converter Telemetry
Bidirectional DC-DC converters in EV platforms need CAN-class links to report voltage, current, and fault telemetry to the vehicle's VCU. The TJA1052IT-1Y's integrated isolation lets the converter's local MCU talk safely to the VCU across the high-voltage isolation barrier without external optocouplers or digital isolators. The SO-16 footprint keeps the converter's controller board compact while still meeting automotive-grade reliability and operating-temperature requirements. Its compatibility with ISO 11898-5 lets the bus idle cleanly in standby when the converter is off.
Recommended
Electric Power Steering (EPS) Communication Link
EPS units combine high-current motor stages with low-voltage ECUs that exchange CAN messages with the rest of the chassis network. The TJA1052IT-1Y supports that boundary by providing an isolated CAN port on the ECU side, keeping noise from the inverter bridge out of the rest of the chassis bus. The high-PSRR and ISO 11898-2 compliance let the EPS module coexist on the same CAN network with non-isolated nodes. Loop delay is well-controlled, which matters when chassis-control loops run on time-triggered cycles.
Recommended
Industrial Isolated CAN Gateways
Factory-automation backplanes routinely bridge CAN segments across equipment that sits on different ground domains - for example, a robot arm joint powered by a motor drive, and a centralized PLC on chassis ground. The TJA1052IT-1Y's integrated isolation lets designers build one PCB that mounts in either domain without re-spinning the hardware, halving the BOM and PCB area vs a discrete isolator-plus-CAN-PHY approach. With a SO-16 footprint and documented cross-brand compatibility to TI's ISO1042 family, sourcing flexibility is excellent for industrial design programs.
Recommended
Charging Infrastructure & Off-Board DC Fast Chargers
Off-board DC fast chargers expose the EV-side CAN bus to harsh transients and long cable runs, so designers need a CAN transceiver that is both isolated and robust. The TJA1052IT-1Y's integrated galvanic isolation and family-level bus-side fault tolerance make it a fit for the controller side of a charging-station-to-vehicle CAN interface, complementing the PLC stack on the station side. Its ISO 11898-2/-5 compliance supports charging-control protocols that ride on standard CAN, while the SO-16 package keeps the controller board compact.
Recommended
Recommended Products Summary
Engineering reference data for TJA1052IT-1Y — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TJA1052IT/5Y | TJA1052IT/2Y | TJA1052IT/3Y | ISO1042DW | ISO1042BDW |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | Texas Instruments | Texas Instruments |
| Package | SO-16 (SOT-109) | SO-16 (same) | SO-16 (same) | SO-16 (same) | SO-16 DW (same) | SO-16 DW (same) |
| Function | Isolated HS CAN transceiver | Isolated HS CAN transceiver | Isolated HS CAN transceiver | Isolated HS CAN transceiver | Isolated CAN transceiver | Isolated CAN transceiver |
| Maximum Data Rate | 1 Mbit/s | 1 Mbit/s | 1 Mbit/s | 1 Mbit/s | 1 Mbit/s | 1 Mbit/s |
| Isolation Rating | 1 kV (channel) | 1 kV (channel) | 1 kV (channel) | 1 kV (channel) | 5 kVrms (basic) | 5 kVrms (basic) |
| Standby Pin | Yes (STB, pin 7) | Yes (STB) | Yes (STB) | Yes (STB) | No (NC on that pin) | No (NC on that pin) |
| Automotive Grade | Yes (targeted EV/HEV) | Yes (targeted EV/HEV) | Yes (targeted EV/HEV) | Yes (targeted EV/HEV) | Industrial | Industrial |
| RoHS Compliant | Yes | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- On-chip galvanic isolation in a single SO-16 footprint (vs Discrete digital isolator + TJA1050/TJA1042 CAN transceiver)
- NXP-targeted EV/HEV part with same SO-16 footprint as ISO1042 (vs TI ISO1042DW)
- Automotive-grade silicon for traction and chassis ECUs (vs Non-automotive-grade CAN isolated solutions)
Design Notes
The TJA1052IT-1Y requires two isolated supplies - VCC1 on the logic side (controller domain) and VCC2 on the bus side (CAN bus domain) - which must be galvanically independent. Adding bulk decoupling (1 uF) plus a 100 nF high-frequency cap on each VCC pin keeps the integrated isolation cell stable. Both rails must rise together or in the right sequence to avoid current injection through the unpowered rail; consult the NXP datasheet sequence figure when designing cold-crank or wake-up timing for EV/HEV applications.
Maintain the full datasheet-specified creepage and clearance across the SO-16 body to preserve the 1 kV isolation rating. Skip signal traces or vias beneath the package body so the isolation barrier is not bridged by residue or conformal coating. Place bus-side CANH/CANL as a 120-ohm-impedance differential pair, length-matched and tied to the bus termination network. Keep the bus-side ground island well separated from the logic-side ground plane - this is the entire point of the TJA1052i.
Loop delay across the TJA1052IT-1Y isolation barrier is well controlled but should still be included in the worst-case CAN timing budget for time-triggered CAN or very high bus utilization. Use the NXP datasheet min/max loop-delay values, not just the typical figure, and add margin equal to the propagation asymmetry. For CAN-FD transitions, validate that bit-timing parameters still resolve cleanly at the highest baud rate before freezing the firmware stack.
Do not connect GND1 and GND2 anywhere on the PCB - this would short-circuit the isolation barrier and defeat the entire purpose of the TJA1052IT-1Y. Also avoid sourcing the bus-side and logic-side supplies from the same regulator before the isolation boundary; otherwise the isolation is reduced to whatever dielectric standoff the PCB offers. Note the documented NI/NXP-to-TI drop-in: when migrating to the ISO1042, leave the Standby pin (which becomes NC on the ISO1042) floating or unsed, and remove any firmware dependency on STB functionality.
Compliance Information
RoHS and REACH compliance per NXP environmental statement for the TJA1052IT family; AEC-Q100 Grade 0/1 expected for the EV/HEV-targeted variants. Halogen-free status not separately published for this OPN - confirm with NXP if required by the application.
