ATA663254-GAQW - LIN SBC with 5V/85mA LDO | Microchip
N.º de pieza: ATA663254-GAQW ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $2.85 | $2,85 |
| 10 | $2.56 | $25,60 |
| 100 | $2.27 | $227,00 |
| 500 | $2.04 | $1.020,00 |
| 1.000 | $1.81 | $1.810,00 |
ATA663254-GAQW Descripción general
A LIN System Basis Chip (SBC) is a mixed-signal IC that integrates a LIN bus transceiver with an on-board voltage regulator and reset/watchdog functions, reducing the bill of materials in automotive and industrial networking nodes. Within the broader power management and interface hierarchy, an SBC sits between a discrete LIN transceiver plus LDO combination and a full automotive microcontroller; the category tree is: LIN SBC -> system basis chip -> interface IC -> semiconductor. By merging the physical-layer transceiver and a 5V/85 mA LDO in one SO-8 package, the ATA663254 lets designers replace two ICs with one, saving PCB area, cost, and qualification effort.
Key features include a 5V/85 mA low-drop voltage regulator with thermal shutdown, integrated LIN transceiver supporting baud rates up to 20 kBaud, low standby current for always-on networks, and a wake-up input for ECU sleep/wake cycling. The device withstands ±8 kV HBM ESD on the LIN bus pin per the LIN 2.x ESD requirement and operates from a wide VBAT supply range commonly seen in 12V automotive systems. The combination of voltage regulator and bus transceiver makes it possible to develop simple but powerful slave nodes in LIN bus systems.
Architecturally, the device uses a bipolar LIN physical layer with slew-rate-controlled waveshaping to meet EMC requirements without external filtering, and an LDO regulator topology optimized for low quiescent current. The result is a part qualified for harsh automotive environments while remaining simple to integrate in 8-pin designs.
Typical applications include automotive body control modules, LIN sensor interfaces (rain/light/temperature sensors), door/window/seat actuators, HVAC blowers, and industrial LIN slave nodes. Industrial uses include building automation, smart-meter peripherals, and any low-cost 12V/24V distributed sensor network. When designing with this part, ensure the LIN bus master pull-up is correctly biased to VBAT (the ATA663254-GAQW is a slave-only transceiver); the 5V regulator output can power an external MCU and a small sensor cluster directly.
Alternativas directas para ATA663254-GAQW — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
ATA663254-GAQW-VAO
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
ATA663254-GBQW
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
ATA663254-GBQW-VAO
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
ATA663231-GAQW
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TLIN1021ADRQ1
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TLIN1029ADRBRQ1
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
ATA663254-GAQW Valores máximos y características eléctricas
| Función | LIN System Basis Chip (transceiver + 5V LDO) |
| Protocol | LIN 2.0 / 2.1 / 2.2 / 2.2A / SAE J2602-2 |
| Number of Drivers/Receivers | 1/1 |
| Regulator Output Voltage | 5 V |
| Regulator Output Current | 85 mA |
| Regulator Type | Low-dropout (LDO) linear regulator |
| LIN Bus Maximum Baud Rate | 20 kBaud (LIN spec compliant) |
| LIN Bus ESD (HBM, LIN pin) | ±8 kV (per LIN 2.x spec) |
| Encapsulado | 8-SOIC (SO-8) |
| Tipo de montaje | Surface Mount |
| Recuento de pines | 8 |
| Estado RoHS | Compliant |
| Wake-up Input | Yes (per datasheet) |
| Apagado térmico | Yes (integrated in LDO) |
Configuración de pines de ATA663254-GAQW
| Pin 1 | LIN — LIN bus line (physical layer input/output) |
| Pin 2 | VBAT — Battery supply voltage input (12V automotive) |
| Pin 3 | GND — Ground |
| Pin 4 | VCC — 5V LDO regulator output (85 mA max) |
| Pin 5 | WK — Wake-up input |
| Pin 6 | EN — Enable input for regulator / mode control |
| Pin 7 | TXD — LIN transmit data input from MCU |
| Pin 8 | RXD — LIN receive data output to MCU |
Aplicaciones típicas
ATA663254-GAQW es adecuado para 6 aplicacións: Automotive Body Control Modules (LIN Slaves), LIN Sensor Interfaces (Rain/Light/Temperature), HVAC Blower and Fan Actuators, Industrial Building Automation (KNX/LIN Bridges), Smart Meter Peripheral Modules, Agricultural / Heavy Equipment Sensor Networks.
Automotive Body Control Modules (LIN Slaves)
The ATA663254-GAQW is purpose-built for LIN slave nodes in automotive body controllers - door modules, seat controllers, mirror adjusters, and window lift ECUs - where a single chip must handle both the LIN physical layer and the local 5V rail. Its 5V/85 mA integrated LDO can power an external 8-bit MCU (e.g. PIC16 or ATtiny) plus a small sensor cluster, while the LIN 2.x/SAE J2602-2 transceiver communicates with the body controller. Compared to a discrete LIN transceiver + LDO design, the integrated SBC saves ~30% PCB area and reduces BOM by 1-2 line items per node.
Recomendado
LIN Sensor Interfaces (Rain/Light/Temperature)
Compact LIN-connected ambient sensors (rain-light-temperature, humidity, particulate) benefit from the ATA663254-GAQW's small SO-8 footprint and integrated 5V supply. The 85 mA LDO is sufficient to power the sensor ASIC plus a small microcontroller and a LIN transceiver driver section; the LIN physical layer supports standard 20 kBaud with slew-rate-controlled waveshaping. The result is a single-chip LIN sensor node that meets LIN 2.x EMC requirements without external filtering.
Recomendado
HVAC Blower and Fan Actuators
LIN-driven HVAC blower modules and cooling-fan actuators use the ATA663254-GAQW as the slave-node SBC that communicates fan speed/diagnostic requests to the HVAC ECU while powering the local microcontroller. The integrated 5V/85 mA LDO feeds the MCU and signal-conditioning circuitry; the LIN physical layer handles the 12V VBAT-supplied bus. The device's bipolar LIN driver withstands the harsh electrical environment of an automotive HVAC box (load-dump transients, key-off battery voltage) while maintaining SAE J2602-2 compliance.
Recomendado
Industrial Building Automation (KNX/LIN Bridges)
Industrial building-automation nodes that bridge LIN to higher-level fieldbuses (KNX, BACnet, Modbus) use the ATA663254-GAQW as the LIN-side SBC. The 5V/85 mA LDO powers the local MCU and any analog front-end, while the LIN 2.x interface communicates with distributed sensors and actuators over a single-wire bus. The wide operating voltage and robust ESD performance (±8 kV HBM on LIN) make the part suitable for industrial 24V cabinet environments with long cable runs.
Recomendado
Smart Meter Peripheral Modules
Smart electricity, water, and gas meters use the ATA663254-GAQW in their peripheral slave modules (e.g. display boards, communication expansion cards) where a LIN backbone connects the meter's main MCU to add-on boards. The integrated 5V regulator delivers a clean supply to display drivers and small sensors, while the LIN transceiver provides reliable 20 kBaud communication on the internal LIN network. The low standby current supports battery-backed or energy-harvested meter designs.
Recomendado
Agricultural / Heavy Equipment Sensor Networks
Off-highway vehicles (tractors, harvesters, construction equipment) use LIN sub-networks for body and implement sensors, where the ATA663254-GAQW's wide VBAT tolerance and 5V integrated regulator simplify slave-node design. The AEC-Q100 sibling (-GAQW-VAO) variant offers an automotive-grade alternative for heavy equipment OEMs that follow automotive quality practices. The integrated LDO eliminates the need for a separate 5V regulator in each sensor module, reducing wiring harness complexity.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para ATA663254-GAQW — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | ATA663254-GAQW-VAO | ATA663254-GBQW | ATA663254-GBQW-VAO | ATA663231-GAQW | TLIN1021ADRQ1 | TLIN1029ADRBRQ1 |
|---|---|---|---|---|---|---|---|
| Package | 8-SOIC (SO-8) | 8-SOIC (SO-8) - same | 8-SOIC (SO-8) - same | 8-SOIC (SO-8) - same | 8-SOIC (SO-8) - same | 8-SOIC (SO-8) - same | 8-SOIC (SO-8) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Texas Instruments | Texas Instruments |
| Integrated LDO Output | 5 V / 85 mA | 5 V / 85 mA | 5 V / 85 mA | 5 V / 85 mA | 3.3 V / 85 mA | None (external LDO required) | None (external LDO required) |
| LIN Protocol Support | LIN 2.0/2.1/2.2/2.2A + SAE J2602-2 | LIN 2.x + SAE J2602-2 | LIN 2.x + SAE J2602-2 | LIN 2.x + SAE J2602-2 | LIN 2.x + SAE J2602-2 | LIN 2.x + SAE J2602-2 | LIN 2.x + SAE J2602-2 |
| AEC-Q100 Automotive Grade | No (industrial) | Yes | No | Yes | No | Yes | Yes |
| LIN Bus ESD (HBM) | ±8 kV | ±8 kV | ±8 kV | ±8 kV | ±8 kV | ±8 kV | ±8 kV |
| Wake-up Input | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| External 5V LDO Required? | No (integrated) | No | No | No | No (integrated 3.3V) | Yes | Yes |
Diferenciadores clave
- Integrated 5V/85 mA LDO eliminates a separate regulator chip (frente a TLIN1021ADRQ1 (Texas Instruments))
- Same-family drop-in variants for every qualification level (frente a TLIN1029ADRBRQ1 (Texas Instruments cross-brand))
- 3.3V/85 mA sibling ATA663231 in same SO-8 footprint (frente a ATA663231-GAQW (same Microchip family))
Notas de diseño
The integrated 5V/85 mA LDO is intended to power the local MCU and a small sensor cluster - it is NOT designed to drive high-current actuators. Estimated headroom: at 85 mA load and 12V VBAT, power dissipation is (12-5)*0.085 = 0.595 W; with the SO-8 package thermal resistance of ~150 C/W (typical, per Microchip ATA663201-Family datasheet JEDEC EIA/JESD51 4-layer test board), junction temperature rise is ~89 C, so derate the load in enclosed or high-temperature environments. For applications above 70 C ambient, add a copper pour under the EP/GND pin to reduce theta_JA.
Place the VBAT decoupling capacitor (typically 100 nF ceramic in parallel with >=4.7 uF electrolytic) within 5 mm of the VBAT pin to suppress LIN load-dump and ignition transient noise. The VCC (5V LDO output) pin requires a >=1 uF ceramic output capacitor for regulator stability; an additional 100 nF high-frequency bypass cap in parallel improves transient response. Keep the LIN trace short and avoid running it parallel to noisy switching traces; the LIN physical layer is slew-rate controlled but still benefits from a clean ground reference.
The ATA663254-GAQW is a slave-only LIN transceiver - it does NOT include the bus master pull-up to VBAT. The master node (or a discrete pull-up resistor) must provide the LIN bus pull-up; without it the bus will not rise to recessive level and communication will fail. Also note that the wake-up pin (WK) and EN pin polarity follows the datasheet default; connecting WK to VBAT continuously disables the wake-on-LIN functionality. For AEC-Q100 automotive designs, order the -GAQW-VAO suffix variant - the standard -GAQW is industrial-grade.
Use a star-ground topology with the ATA663254-GAQW's GND pin as the star point for the LIN bus ground return. Avoid daisy-chaining the LIN ground through other ICs - long ground loops create common-mode noise that the LIN receiver may misinterpret as a dominant bit. Place the LIN pull-up resistor (typically 1 kOhm to VBAT, or 30 kOhm for slave-only per LIN spec) at the master end of the bus, not at every slave node.
Información de cumplimiento
Standard -GAQW variant is industrial-grade; the -GAQW-VAO sibling is AEC-Q100 qualified for automotive. RoHS compliant per Microchip product page. LIN protocol compliance to LIN 2.0/2.1/2.2/2.2A and SAE J2602-2 per the family datasheet.
