TJA1046VTKZ - Dual HS CAN Transceiver w/ Standby | NXP | Automotive
Référence : TJA1046VTKZ ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $4.12 | $4,12 |
| 10 | $3.71 | $37,10 |
| 100 | $3.18 | $318,00 |
| 500 | $2.74 | $1 370,00 |
| 1 000 | $2.45 | $2 450,00 |
TJA1046VTKZ Présentation
A CAN transceiver is a physical-layer (PHY) interface IC that translates the differential CANH/CANL bus voltages required for robust in-vehicle networking into standard digital TX/RX logic levels for a microcontroller's CAN protocol controller. It sits between the MCU's CAN module (data link layer) and the wired CAN bus, providing the dominant/recessive bit signaling, common-mode rejection, bus fault protection, and ESD handling required by ISO 11898. The TJA1046VTKZ integrates two such PHYs on one die, saving board area versus discrete single-channel transceivers in zonal and gateway ECUs.
Key features of the TJA1046VTKZ include very low-current standby mode with bus wake-up (per ISO 11898-5), thermal protection, bus dominant time-out, and high ESD robustness on the bus pins. Both channels share the same standby/wake behavior; the device targets automotive ECUs requiring dual CAN channels such as body control modules, gateway ECUs, and ADAS sensor aggregation nodes. The HVSON-14 (3x4.5) exposed-pad package provides a low thermal resistance path, which is critical for under-hood and high-ambient-temperature installations.
The architecture pairs two independent TJA1044-style transceivers on a common die, with shared thermal shutdown and independent TXD/RXD/standby control per channel. Each channel includes a low-drop voltage regulator for internal logic, slope control for reduced EMI, and an integrated bus termination concept suitable for HS-CAN nodes. Per the NXP datasheet the part is optimized for automotive EMC performance including SAE J2962-related conformance expectations.
Typical applications include dual-CAN automotive ECUs (body control modules, gateways, instrument clusters), industrial CAN nodes with dual buses (CANopen, DeviceNet), and OBD-II dual-channel diagnostic interfaces. The standby mode makes it suited for always-on networks that must wake on bus activity. When designing with the TJA1046VTKZ, ensure the exposed pad is soldered to a sufficiently large copper pour (>= 50 mm^2) and that the bus stubs to CANH/CANL are kept below the ISO 11898-2 maximum length for the chosen data rate. A common-mode choke and split termination improve EMI/ESD margin.
This page synthesizes distributor pricing, drop-in automotive-qualified alternatives, and practical PCB layout guidance not found on the NXP datasheet cover page.
Alternatives de remplacement direct pour TJA1046VTKZ — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
TJA1046VG
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
TJA1046VT/3
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
TJA1044GT/3
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
TJA1057GT/3
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
TLE7251VLE
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
TJA1046VTKZ Spécifications
| Product Type | Dual High-Speed CAN Transceiver |
| Number of Channels | 2 (two independent transceivers) |
| Débit de données | Up to 1 Mbit/s (HS-CAN, ISO 11898-2) |
| Supply Voltage (VCC) | 4.75 V to 5.25 V |
| Température de fonctionnement | -40°C to +125°C (automotive grade) |
| Boîtier | HVSON-14 (3x4.5 mm) with exposed pad |
| Type de montage | Surface Mount |
| Niveau de sensibilité à l'humidité (MSL) | 1 |
| Peak Reflow Temperature | 260°C (JEDEC J-STD-020) |
| Terminal Finish | NiPdAuAg (JESD-609 e4) |
| Compliance | VeLIO Certified, ISO 11898-2/-5 |
| Statut RoHS | Compliant |
| Automotive Qualification | AEC-Q100 (per NXP product family) |
| Wake-Up Feature | Bus wake-up from standby per ISO 11898-5 |
| Protections | Thermal shutdown, bus dominant time-out, bus fault tolerant |
Configuration des broches de TJA1046VTKZ
| Broche 1 | TXD1 — Transmit data input, channel 1 (to MCU CAN1 TX) |
| Broche 2 | GND — Ground |
| Broche 3 | VCC — 5V transceiver supply |
| Broche 4 | RXD1 — Receive data output, channel 1 (to MCU CAN1 RX) |
| Broche 5 | STB1/NSTB1 — Standby control input, channel 1 |
| Broche 6 | CANH1 — CAN high bus pin, channel 1 |
| Broche 7 | CANL1 — CAN low bus pin, channel 1 |
| Broche 8 | TXD2 — Transmit data input, channel 2 (to MCU CAN2 TX) |
| Broche 9 | VIO — Logic-level supply (3.3V or 5V tolerant) |
| Broche 10 | RXD2 — Receive data output, channel 2 (to MCU CAN2 RX) |
| Broche 11 | STB2/NSTB2 — Standby control input, channel 2 |
| Broche 12 | CANH2 — CAN high bus pin, channel 2 |
| Broche 13 | CANL2 — CAN low bus pin, channel 2 |
| Broche 14 | EP — Exposed thermal pad - solder to ground pour for heatsinking |
Applications typiques
TJA1046VTKZ convient pour 6 applications: Automotive Body Control Module (BCM), Automotive Central Gateway ECU, ADAS Sensor Aggregation Node, Industrial Dual-CAN PLC Interface, Off-Highway / Construction Equipment Telematics, OBD-II Dual-Channel Diagnostic Tool.
Automotive Body Control Module (BCM)
The TJA1046VTKZ integrates two independent HS-CAN channels in a single HVSON-14 package, making it a natural fit for body control modules that must talk to both the powertrain CAN (500 kbit/s) and a body/chassis CAN (125 kbit/s to 500 kbit/s) simultaneously. Each channel is functionally equivalent to a TJA1044GT and supports ISO 11898-2, while the shared standby and wake-up logic lets the BCM sleep at <30 uA and wake on bus activity per ISO 11898-5. The exposed pad of the HVSON-14 keeps junction temperature inside the -40C to +125C automotive range even in-cowl mounting. Recommend pairing with the NXP S32K14x MCU family for CAN-FD-capable body ECUs, and use a CAN bus shield / choke on the bus pins to pass OEM EMC conformance tests.
Recommandé
Automotive Central Gateway ECU
Modern vehicle gateways bridge between powertrain, body, chassis, and ADAS CAN buses, often needing 3 or more independent CAN channels. The TJA1046VTKZ provides two of those channels on a single die, freeing PCB area for the gateway MCU and Ethernet PHYs. Both channels support high-speed CAN per ISO 11898-2 with low loop delay, and the bus dominant time-out protects against a malfunctioning node holding the bus dominant. The VeLIO compliance and AEC-Q100 automotive qualification of the TJA1046V family fit central-gateway reliability targets. Recommended companion ICs are the NXP S32G2 vehicle network processor for service-oriented gateways and an Ethernet PHY such as NXP TJA1103 for backbone connectivity.
Recommandé
ADAS Sensor Aggregation Node
ADAS sensor nodes (radar, lidar, vision) increasingly aggregate data over multiple CAN channels to a central ECU. The TJA1046VTKZ's dual HS-CAN channels let an ADAS sensor cluster present two independent buses (one to chassis CAN, one to a private sensor CAN) from one compact HVSON-14 footprint. The TJA1046V family is engineered for low EMC emissions and high immunity, important when the node sits next to mmWave radar front ends. The exposed-pad HVSON-14 keeps thermal rise small at sustained bus traffic. Recommended companion ICs are the NXP S32R294 radar MCU and an automotive-grade LDO such as NXP PF5300 for the 5V transceiver rail.
Recommandé
Industrial Dual-CAN PLC Interface
Industrial programmable logic controllers and motion controllers use dual CAN interfaces for redundant fieldbuses or for bridging CANopen (DS301) and a proprietary CAN network. The TJA1046VTKZ supports 1 Mbit/s HS-CAN with bus fault tolerance and thermal shutdown, satisfying IEC 61131-2 type-test expectations when paired with an appropriate DC-DC and TVS protection on the bus. The standby and wake-up behavior lets battery-backed PLCs sleep until fieldbus activity is detected. Recommended companion ICs are the TI TMS320F2838x C2000fRS-485 dual-CAN MCU and an isolated CAN solution such as TI ISO1042 if galvanic isolation is required.
Recommandé
Off-Highway / Construction Equipment Telematics
Off-highway equipment (agriculture, construction, mining) uses dual CAN buses - one for engine/powertrain (J1939) and one for body/chassis (J1939-71/-73). The TJA1046VTKZ's automotive-grade robustness and 4.75V to 5.25V supply tolerance suit 12V/24V vehicle electrical systems with load-dump transients suppressed by an external TVS. The HVSON-14 with exposed pad keeps the device cool under sustained high bus traffic from sensor-heavy machinery. Recommend pairing with the NXP S32K3xK3 automotive MCU and a J1939 stack from a vendor such as Bosch or Vector.
Recommandé
OBD-II Dual-Channel Diagnostic Tool
Professional OBD-II scan tools increasingly need to read two CAN buses at once (powertrain CAN and body/chassis CAN) for advanced diagnostics and flashing. The TJA1046VTKZ provides two independent HS-CAN channels with the bus fault tolerance and ESD robustness required to survive direct attachment to a vehicle's DLC pin without an isolation barrier in low-end units. Both channels can be put into standby when the tool is unplugged. Recommended companion ICs are an STM32F4/7MP1 dual-CAN MCU and an isolated CAN solution such as ADM3053 if the design requires SAE J2534 galvanic isolation.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour TJA1046VTKZ — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | TJA1046VG | TJA1046VT/3 | TJA1044GT/3 | TJA1057GT/3 | TLE7251VLE |
|---|---|---|---|---|---|---|
| Package | HVSON-14 (3x4.5 mm) w/ EP | HVSON-14 (3x4.5 mm) w/ EP - same | HVSON-14 (3x4.5 mm) w/ EP - same | HVSON-14 (3x4.5 mm) w/ EP - same | HVSON-14 (3x4.5 mm) w/ EP - same | HVSON-14 (3x4.5 mm) w/ EP - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | Infineon |
| Number of CAN Channels | 2 (dual) | 2 (dual) | 2 (dual) | 1 (single) | 1 (single) | 1 (single) |
| Max Data Rate | 1 Mbit/s (HS-CAN) | 1 Mbit/s (HS-CAN) | 1 Mbit/s (HS-CAN) | 1 Mbit/s (HS-CAN) | 1 Mbit/s (HS-CAN) | 1 Mbit/s (HS-CAN, CAN FD-capable per ISO 11898-2:2016) |
| Standby Mode | Yes (low-current, ISO 11898-5 wake-up) | Yes | Yes | Yes | Yes | Yes |
| Automotive Grade | AEC-Q100, VeLIO | AEC-Q100, VeLIO | AEC-Q100, VeLIO | AEC-Q100 | AEC-Q100 | AEC-Q100 |
| VCC Supply | 5V nominal (4.75-5.25V) | 5V | 5V | 5V | 5V | 5V |
| Operating Temperature | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +150C |
Principaux différenciateurs
- Two independent HS-CAN transceivers on one die in a single HVSON-14 package (vs TJA1044GT/3)
- VeLIO compliance for automotive OEMs (vs TLE7251VLE)
- Shared standby and wake-up logic across both channels (vs Two discrete single-channel transceivers)
Notes de conception
Solder the exposed pad of the HVSON-14 to a contiguous top-layer copper pour of at least approximately 50 mm^2, stitched with thermal vias (>= 9 vias, 0.3 mm drill, 1 mm pitch) to inner ground planes. With theta_JA in the high 30s C/W for a 4-layer 1s0p stackup (per typical JEDEC EIA/JESD51 classifications), this keeps junction temperature inside the -40C to +125C automotive range at sustained 100% bus load. Do NOT leave the EP floating - that creates a hot-spot that may trigger TSD at moderate ambient.
Route CANH and CANL as a tightly coupled differential pair (100 ohm differential impedance, <2 mm spacing) directly to a common-mode choke placed within 5 mm of the IC pins. Use split termination (60 ohm + 60 ohm with a 10 nF/100 nF NPO cap to ground at the center node) to suppress common-mode emissions and improve ESD robustness. Keep total bus stub length below the ISO 11898-2 limit for the chosen data rate (typically < 1 m stub at 1 Mbit/s).
Decouple VCC with a 100 nF X7R ceramic placed within 2 mm of the VCC pin, plus a bulk 4.7 uF to 10 uF ceramic on the same node. Provide a TVS (e.g. SMAJ33CA or PESD1CAN) on each CANH/CANL pair for automotive transient suppression (ISO 7637-2 pulses 1, 2a, 3a/b). The VIO rail (logic-level supply) MUST be present before VCC, or the device may power up in an undefined state - sequence VIO before VCC in safety-critical designs.
Do NOT forget to tie STB1/NSTB1 and STB2/NSTB2 to the correct logic level - leaving them floating can keep the channel in standby permanently or cause a 10 mA quiescent bias current. Ensure the host MCU's CAN_TX pin is reconfigured as a standard GPIO (low) before entering MCU sleep so the TJA1046VTKZ does not see a floating TXD and drive the bus dominant into a permanent-dominant fault.
Informations de conformité
RoHS compliant per NXP product folder; AEC-Q100 qualified as part of TJA1046V automotive family; VeLIO certified per NXP page; MSL-1 per JEDEC J-STD-020; JESD-609 e4 (NiPdAuAg) terminal finish.
