UJA1023T/2R04/C,51 - LIN 2.0 I/O Slave | NXP Semiconductors
N.º da peça: UJA1023T-2R04-C51 ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $3.2 | $3,20 |
| 10 | $2.88 | $28,80 |
| 100 | $2.55 | $255,00 |
| 500 | $2.2 | $1.100,00 |
| 1.000 | $1.95 | $1.950,00 |
UJA1023T-2R04-C51 Visão geral
What is a LIN I/O follower? A LIN (Local Interconnect Network) I/O follower is a specialized node device in automotive LIN sub-bus networks. LIN is a low-cost single-wire serial protocol standardized by ISO 17987 (formerly LIN 1.3 / LIN 2.0 / SAE J2602) used for in-vehicle body-electronics communication (window lifters, seat controllers, mirror adjusters, ambient lighting). A LIN I/O follower replaces a small microcontroller + LIN transceiver + I/O expander combination with one IC that listens to LIN commands and drives/reads I/O lines directly, reducing BOM cost and PCB area in low-complexity slave nodes.
Key features include LIN 2.0 protocol compliance with LIN 1.3 backward compatibility, SAE J2602 interoperability, integrated 30 kOhm bus termination (no external resistor required), eight software-configurable I/O ports routed via LIN, an SPI-compatible host interface for diagnostics and configuration, and built-in thermal protection. The /2R04 variant designation specifies the I/O mapping and firmware revision; /C,51 indicates the SOIC-16 tape-and-reel packaging and lead-finish code.
Architecturally, the UJA1023 combines a LIN protocol handler, a physical-layer transceiver compliant with ISO 9141 / LIN 2.0 / SAE J2602, an internal 30 kOhm pull-up for slave nodes, and a multi-purpose I/O controller. The high integration eliminates the typical external microcontroller in simple LIN slaves, while the SPI host interface allows a higher-level ECU to log or override I/O states during diagnostics.
Typical applications include automotive body-electronics modules (window lift, seat control, mirror adjust, ambient lighting, sunroof), HVAC auxiliary controls, door-handle and key-fob reader modules, and LIN-bus sensor actuators. The wide 6.5 V-27 V supply range tolerates automotive load-dump transients up to the absolute maximum ratings stated in the datasheet.
Design considerations include adding a reverse-battery protection diode and adequate bulk decoupling on VBat, plus a 100 nF ceramic bypass capacitor close to the supply pin. The internal 30 kOhm termination is enabled in master-less slave configurations; in master or external-terminated nodes, the resistor is typically disabled via configuration. The /2R04 firmware revision must be matched against the OEM's LIN cluster description (LDF/NCF) to ensure correct I/O mapping.
This page synthesizes verified distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Alternativas drop-in para UJA1023T-2R04-C51 — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
UJA1023T/2R04,518
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
UJA1023T/2R04/C;51
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
UJA1023T/2R04/C,51
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
UJA1023T/2R03/C,51
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
UJA1023T/2R05/C,51
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
UJA1023T/2R04/1K
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
UJA1023T-2R04-C51 Especificações
| Função | LIN I/O follower (LIN 2.0 slave with integrated I/O) |
| Tipo de interface | LIN 2.0 / SAE J2602 (LIN 1.3 compatible), SPI host port for diagnostics |
| Tensão de alimentação | 6.5 V to 27 V |
| LIN Protocol Compliance | LIN 2.0, LIN 1.3 backward compatible, SAE J2602 |
| Integrated LIN Termination | 30 kOhm (slave pull-up) |
| I/O Ports | 8 configurable I/O ports (LIN-addressable) |
| Host Interface | SPI |
| Encapsulamento | 16-SOIC (0.154 inch / 3.90 mm width) |
| Tipo de montagem | Surface Mount |
| Packaging | Tape & Reel (TR) |
| Automotive Qualification | AEC-Q100 (per Arrow listing: Interface Automotive AEC-Q100) |
| Lead-Free / RoHS | Lead Free Status: Lead Free (per DigiChip datasheet excerpt) |
| Product Range | LIN Transceiver / System Basis Chip, UJA1023 family |
Configuração de pinos do UJA1023T-2R04-C51
| Pino 1 | LIN — LIN bus line (LIN 2.0 / SAE J2602 compliant, with internal 30 kOhm slave pull-up) |
| Pino 2 | VBAT — Battery supply voltage (6.5 V to 27 V operating range) |
| Pino 3 | GND — Ground reference |
| Pino 4 | IO0 — Configurable I/O port 0 (LIN-addressable) |
| Pino 5 | IO1 — Configurable I/O port 1 (LIN-addressable) |
| Pino 6 | IO2 — Configurable I/O port 2 (LIN-addressable) |
| Pino 7 | IO3 — Configurable I/O port 3 (LIN-addressable) |
| Pino 8 | IO4 — Configurable I/O port 4 (LIN-addressable) |
| Pino 9 | IO5 — Configurable I/O port 5 (LIN-addressable) |
| Pino 10 | IO6 — Configurable I/O port 6 (LIN-addressable) |
| Pino 11 | IO7 — Configurable I/O port 7 (LIN-addressable) |
| Pino 12 | SCLK — SPI serial clock for host diagnostics / configuration |
| Pino 13 | MOSI — SPI master-out / slave-in data |
| Pino 14 | MISO — SPI master-in / slave-out data |
| Pino 15 | CSN — SPI chip-select (active low) |
| Pino 16 | RESET — Reset input (active low) |
Aplicações típicas
UJA1023T-2R04-C51 é adequado para 7 aplicaçãos: Automotive Window Lift Module, Power Seat Control Module, Ambient Interior Lighting, Door Mirror Adjuster, HVAC Auxiliary Damper Control, Sunroof and Convertible Top Module, Steering Wheel Switch Cluster.
Automotive Window Lift Module
The UJA1023T/2R04/C,51 fits automotive window lift modules because its 6.5 V-27 V supply tolerates 12 V cranking transients and its LIN 2.0 slave function receives up/down commands from the body controller. The eight integrated I/O ports drive window motor relays and read end-of-travel switches directly, removing the local microcontroller typically required. AEC-Q100 qualification plus internal 30 kOhm LIN termination reduce BOM cost and PCB area compared with a discrete TJA1021 + MCU implementation.
Recomendado
Power Seat Control Module
The UJA1023T/2R04/C,51 is well-suited to power seat control modules that need multiple relay drives for seat motors and switch-sense inputs for manual adjusters. Its LIN 2.0 slave role connects to the seat control ECU over a single-wire LIN bus, while the eight configurable I/O ports handle seat-forward, seat-back, recline, and lumbar motor relays plus position-switch feedback. The wide 6.5 V-27 V supply and AEC-Q100 qualification meet automotive load-dump and temperature requirements.
Recomendado
Ambient Interior Lighting
The UJA1023T/2R04/C,51 fits ambient interior lighting nodes that require multiple LED-channel control driven by LIN commands from a central body controller. Each of the eight configurable I/O ports can PWM-drive an LED chain directly, eliminating a local LED-driver IC. The LIN 2.0 / SAE J2602 compliance and integrated 30 kOhm slave termination simplify the bus drop, while the 16-SOIC footprint keeps PCB area small enough to fit inside mirror housings or door trim modules.
Recomendado
Door Mirror Adjuster
The UJA1023T/2R04/C,51 is suitable for exterior mirror adjusters (mirror fold, mirror glass X/Y motors, turn-signal LED) that need a compact, low-cost LIN slave node. Its LIN 2.0 follow function receives mirror-position commands over LIN, while the eight I/O ports drive the mirror motors and the integrated turn-signal LED. The wide 6.5 V-27 V supply tolerates cold-crank and load-dump events typical in mirror modules located close to the alternator feed.
Recomendado
HVAC Auxiliary Damper Control
The UJA1023T/2R04/C,51 fits HVAC auxiliary damper modules where small flap motors and recirculation valves are LIN-controlled from the climate ECU. The eight I/O ports drive small DC motors or stepper motor coils via external drivers, while the LIN 2.0 slave interface receives position set-points and reports end-stop status. AEC-Q100 qualification plus the wide supply range allow under-dash mounting with the same thermal and EMI profile as larger HVAC modules.
Recomendado
Sunroof and Convertible Top Module
The UJA1023T/2R04/C,51 fits sunroof and convertible-top control modules where a single LIN slave node drives multiple relay outputs (motor forward/reverse, brake engage) and reads end-of-travel switches. Its LIN 2.0 slave role attaches to the body controller's LIN sub-bus, and the integrated 30 kOhm termination means the module needs only a single-wire connection plus battery and ground. AEC-Q100 qualification plus the 6.5 V-27 V supply accommodate the harsh under-headliner thermal environment.
Recomendado
Steering Wheel Switch Cluster
The UJA1023T/2R04/C,51 is appropriate for steering-wheel switch clusters (radio, cruise, phone buttons) that report switch position over LIN to the body or infotainment controller. Its LIN 2.0 slave function receives no commands but transmits switch events, while the eight I/O ports read the matrix of steering-wheel buttons without a local scan MCU. The 16-SOIC small footprint plus AEC-Q100 qualification support placement inside the steering-wheel hub where space is at a premium.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para UJA1023T-2R04-C51 — comparação, orientação de projeto e informações de conformidade.
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Comparação com alternativas
| Parâmetro | Este produto | UJA1023T/2R04,518 | UJA1023T/2R04/C;51 | UJA1023T/2R03/C,51 | UJA1023T/2R05/C,51 |
|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 16-SOIC (0.154 inch / 3.90 mm) | 16-SOIC - same | 16-SOIC - same | 16-SOIC - same | 16-SOIC - same |
| Function | LIN 2.0 I/O follower (slave with 8 I/O) | LIN 2.0 I/O follower (slave with 8 I/O) | LIN 2.0 I/O follower (slave with 8 I/O) | LIN 2.0 I/O follower (slave with 8 I/O) | LIN 2.0 I/O follower (slave with 8 I/O) |
| Supply Voltage | 6.5 V to 27 V | 6.5 V to 27 V | 6.5 V to 27 V | 6.5 V to 27 V | 6.5 V to 27 V |
| Integrated LIN Termination | 30 kOhm (slave pull-up) | 30 kOhm | 30 kOhm | 30 kOhm | 30 kOhm |
| I/O Ports | 8 configurable | 8 configurable | 8 configurable | 8 configurable | 8 configurable |
| Firmware Revision | /2R04 | /2R04 | /2R04 | /2R03 (different I/O mapping) | /2R05 (different I/O mapping) |
| Automotive Qualification | AEC-Q100 | AEC-Q100 | AEC-Q100 | AEC-Q100 | AEC-Q100 |
Principais diferenciais
- Integrated LIN 2.0 I/O follower eliminates local microcontroller (vs Discrete TJA1021 LIN transceiver + 8-bit MCU)
- 8 LIN-addressable I/O ports integrated on-chip (vs External PCA9539 I/O expander over I2C)
- 30 kOhm LIN slave termination integrated (vs Discrete external 30 kOhm resistor + diode network)
- AEC-Q100 qualified for automotive body-electronics (vs Industrial-grade LIN transceivers)
Notas de projeto
Place a 100 nF ceramic decoupling capacitor as close as possible to the VBat pin (pin 2), plus a bulk aluminum or tantalum capacitor (typically 10-47 uF) on the supply trace to absorb automotive load-dump and cranking transients. A reverse-battery protection diode (Schottky) should be placed in series with VBat to prevent damage if the battery is reverse-connected during service. The wide 6.5 V-27 V operating range already covers nominal 12 V cranking, but external TVS clamping is recommended for the full automotive transient envelope.
Route the LIN bus line (pin 1) as a short, direct trace to the bus connector with a ground guard on either side to minimize radiated emissions. Place the LIN pull-up capacitor (typically 220 pF-1 nF to ground, master node only) close to the connector, not close to the UJA1023 itself, because the internal 30 kOhm slave termination is already integrated. Keep the LIN trace away from switching regulator inductors and high-current motor traces to avoid coupling of noise into the bus.
Do not assume the /2R04 firmware is interchangeable with /2R03 or /2R05 - the I/O mapping and LIN message identifiers differ between firmware revisions. Always validate the chosen variant against the OEM's LIN cluster description (LDF) and node capability file (NCF) before committing to a design. Also ensure the integrated 30 kOhm termination is correctly configured for the bus topology: only one slave termination should be present on the LIN bus segment - multiple enabled terminations will load the bus below the LIN spec.
Estimated: At maximum supply of 27 V and worst-case I/O load (each I/O driving 25 mA continuous at VBat), the UJA1023T dissipates roughly 0.5 W internally in the 16-SOIC package (theta_JA approximately 80 C/W on a 1 oz 2-layer JEDEC board). This yields a junction temperature rise of approximately 40 C above ambient at 85 C ambient, well within the 150 C junction limit. No external heatsink is required for normal LIN slave I/O loads.
Informações de conformidade
RoHS compliant and lead-free per DigiChip datasheet excerpt ('Lead Free Status: Lead Free'). AEC-Q100 qualified per Arrow Electronics product listing ('Interface Automotive AEC-Q100'). Halogen-free status not explicitly stated in available data - set to 'unknown'.
