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STMicroelectronics L9663-TR-1
- Part No.:
- L9663-TR-1
- Manufacturer:
- STMicroelectronics
- Category:
- Specialized
- Package:
- 28-VFQFN Exposed Pad
- Datasheet:
-
L9663-TR-1.pdf
- Description:
- IC INTFACE SPECIALIZED 28VFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:1,625
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Product details
Overview
L9663-TR-1 from STMicroelectronics is an AEC-Q100 qualified dual-channel PSI5 transceiver IC for automotive sensor communication, supporting both PSI5 v1.3 and v2.x standards. It delivers Manchester-coded digital data at 125 kbps (configurable to 83.3 kbps or 189 kbps), features integrated FLL-based timing control, and operates across VB = 4.8 V to 35 V with ambient temperature range of –40°C to +140°C. It powers and reads sensors over shared PSI5 lines in ECU-sensor systems.
For engineers reviewing the L9663-TR-1 datasheet, L9663-TR-1 pinout, L9663-TR-1 application, or L9663-TR-1 equivalent, this device is selected for high-EMC robustness, synchronous/asynchronous sensor bus operation, SPI-configurable transceiver enablement, and fault-tolerant interface protection including reverse voltage and ±1.5 V ground shift resilience.
Technical Context
The L9663 implements two independent PSI5 transceiver channels with dedicated bootstrap circuits for sync pulse generation (VSYNCx), each supporting configurable data rates and Manchester decoding with mark-space error correction. Its integrated charge pump pre-regulator supplies VAS at 5.3 V or 7.6 V, while the FLL module locks to internal/external clock references for precise timing control during synchronous mode.
It supports two system architectures: Mode 1 performs full Manchester decoding and buffer management on-chip before SPI transfer to MCU; Mode 2 outputs raw Manchester data directly to an external PSI5-capable microcontroller. Diagnostics include VAS/VSYNCx voltage monitoring, PSIx short-circuit detection, and cross-coupling tests per ISO 16750-2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| PSI5 Channels | 2 independent transceivers, each configurable for synchronous or asynchronous operation per PSI5 v1.3/v2.x. |
| Data Rate | 125 kbps nominal (also supports 83.3 kbps and 189 kbps); determines maximum sensor sampling frequency in bussed topology. |
| Supply Range (VB) | 4.8 V to 35 V; enables direct connection to automotive battery with transient tolerance up to 40 V. |
| Operating Temp | –40°C to +140°C ambient; validated for under-hood ECU placement per AEC-Q100 Grade 0. |
| SPI Interface | 32-bit address-multiplexed interface; enables register-level configuration of channel enable, timing, diagnostics, and buffer access. |
| FLL Accuracy | ±0.5% timing error over temperature; ensures reliable sync pulse alignment and frame boundary detection in noisy environments. |
| VAS Pre-regulation | Integrated charge pump with spread-spectrum control; delivers stable 5.3 V or 7.6 V to sensors without external LDO. |
Pinout & Package
Package: VFQFPN28 (5 × 5 × 1.0 mm, exposed pad down) - thermally optimized for automotive under-hood thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SYNC1) | Direct interface sync pulse trigger input | Accepts external sync command for Transceiver 1; enables deterministic timing coordination with MCU. |
| 2 (DOUT1) | Direct interface output / Interrupt 1 | Manchester data output or interrupt assertion when sensor data ready; dual-role reduces pin count in Mode 2. |
| 3 (CLKIN) | External clock input | Optional reference for FLL; improves timing accuracy when internal oscillator insufficient for tight sync requirements. |
| 4 (SYNC2) | Direct interface sync pulse trigger input | Independent sync control for Transceiver 2; allows staggered sensor polling in multi-sensor clusters. |
| 5 (DOUT2) | Direct interface output / Interrupt 2 | Second channel data/interrupt path; supports concurrent dual-sensor acquisition without arbitration delay. |
| 7 (BH1) | Bootstrap capacitor pin / SYNC voltage supply | Provides charge storage for VSYNC1 generation; eliminates need for external high-voltage DC-DC in sync pulse path. |
| 8 (BL1) | Bootstrap capacitor pin | Completes bootstrap circuit for Transceiver 1; enables >12 V sync pulses from 5 V supply rail. |
| 9 (GND1) | Analog & substrate ground return | Dedicated low-noise ground for PSI5 analog front-end; prevents coupling between digital switching and sensor signal paths. |
| 10 (PSI1) | PSI5 bidirectional interface line | Single-wire power+data bus for sensor; supports point-to-point or bussed topologies with current modulation. |
| 11 (VAS) | Pre-regulated sensor supply input | Input for regulated VAS (5.3 V / 7.6 V); powers sensors and sets PSI5 common-mode level for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated FLL timing control | Eliminates need for external crystal or precision oscillator; maintains <±0.5% sync pulse jitter across temperature and voltage. |
| Bootstrap-based sync pulse generation | Generates >12 V sync pulses from 5 V supply rail using internal charge pump; meets PSI5 v2.x amplitude requirements without external boosters. |
| Current-limited & clamped PSIx pins | Withstands short-to-battery, short-to-ground, and ±1.5 V ground shift; ensures functional safety compliance per ISO 26262 ASIL-B. |
| Configurable Manchester decoder | Performs real-time mark-space error correction and automatic sensor initialization data storage; reduces MCU firmware overhead in Mode 1. |
| 32-bit SPI with address multiplexing | Enables full register access using only 4 pins (CS, SCK, MOSI, MISO); simplifies PCB routing and supports daisy-chain configurations. |
Applications
| Engine Knock Sensor Interface | ABS Wheel Speed Sensor Hub |
|---|---|
|
Use Scenario: Real-time acquisition of high-frequency knock events from piezoelectric sensors mounted on engine block. IC Role / Device Role / Timing Role: PSI5 transceiver providing synchronized excitation pulses and Manchester-decoded sensor response via SPI to engine control unit. Use Value: 189 kbps data rate enables sub-millisecond sampling resolution; FLL-controlled timing ensures phase coherence across multiple knock channels. |
Use Scenario: Bussed connection of four wheel speed sensors to single ECU node in anti-lock braking system. IC Role / Device Role / Timing Role: Dual-channel transceiver managing two independent PSI5 buses, each serving two sensors in time-multiplexed mode. Use Value: Integrated current limitation and ±1.5 V ground shift tolerance maintain signal integrity despite chassis vibration-induced ground bounce. |
| Transmission Oil Temperature Sensor Network | Steering Angle Sensor Interface |
|
Use Scenario: Monitoring oil temperature at multiple locations inside automatic transmission housing using distributed PSI5 sensors. IC Role / Device Role / Timing Role: Asynchronous PSI5 receiver collecting buffered sensor data; SPI transfers complete frames upon interrupt assertion. Use Value: VAS pre-regulator delivers stable 5.3 V to all sensors over long harness runs; reverse voltage protection prevents damage during service disconnect. |
Use Scenario: High-accuracy steering angle measurement using dual-resolver or magneto-resistive PSI5 sensor in column-mounted module. IC Role / Device Role / Timing Role: Synchronous transceiver generating precise sync pulses for resolver excitation and reading position data with minimal latency. Use Value: Bootstrap circuit ensures >12 V sync amplitude required for resolver coil drive; integrated diagnostics flag VAS undervoltage before sensor dropout occurs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PSI5 transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NXP MC33664 | Single-channel PSI5 transceiver; no integrated FLL; requires external crystal for timing; max data rate 125 kbps only. | Lacks dual-channel capability and synchronous pulse amplitude flexibility; limited to simpler sensor nodes. | Select when cost-sensitive single-sensor applications require AEC-Q100 qualification but do not need bussed topology or variable sync amplitude. |
| Infineon TLE493D-W2B6 | Integrated magnetic 3D sensor with embedded PSI5 transmitter; no receiver function; fixed 125 kbps rate; no SPI configuration interface. | Acts as sensor endpoint only; cannot serve as ECU-side transceiver; no diagnostic register access. | Select only for compact magnetic sensing nodes where transceiver functionality resides elsewhere in the system. |
Compared with MC33664 and TLE493D-W2B6, the L9663-TR-1 uniquely combines dual-channel operation, programmable data rates up to 189 kbps, integrated FLL timing, and full SPI-configurable diagnostics-making it suitable for complex, multi-sensor ECU designs requiring timing autonomy and fault coverage.
Availability
L9663-TR-1 is available at Aetrix Electronics and suitable for automotive engine control units, ABS modules, and transmission control systems requiring stable component supply across extended temperature and voltage ranges.
Supply support for L9663-TR-1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader specializing in automotive, industrial, and power management solutions, with broad portfolio of AEC-Q100 qualified products.
The L9663 belongs to ST's automotive interface IC product line, designed specifically for robust, low-latency sensor communication in safety-critical vehicle subsystems.
FAQ
What PSI5 protocol versions does the L9663-TR-1 support?
The L9663-TR-1 fully supports both PSI5 revision 1.3 and 2.x standards, including frame formats, sync pulse encoding (duration vs. masking), and data word lengths from 8 to 28 bits. It handles backward-compatible operation without firmware changes, and its dual-channel architecture allows mixed-version sensor networks on separate buses.
How does the integrated charge pump pre-regulator function in the L9663-TR-1?
The charge pump pre-regulator generates VAS at either 5.3 V or 7.6 V from the VASSUP supply, using spread-spectrum switching to reduce EMI. It activates automatically when VASSUP falls below threshold, eliminating need for external regulators. Output voltage is selectable via SPI register, and regulation remains stable across –40°C to +140°C.
Can the L9663-TR-1 operate in both synchronous and asynchronous modes simultaneously?
Yes - each of the two transceiver channels can be independently configured for synchronous or asynchronous operation via SPI. This enables hybrid topologies, such as synchronous polling of critical sensors (e.g., knock) while asynchronously collecting data from slower sensors (e.g., cabin temperature), all within one IC.
What protection features prevent damage during automotive load dump or reverse battery conditions?
The L9663-TR-1 includes reverse voltage protection on all interface pins, current limiting on PSIx lines, and voltage clamping to limit PSIx to ≤16.5 V during sync pulses and ≤11 V during data transmission. It tolerates ±1.5 V ground shift and survives ISO 7637-2 Pulse 5a (load dump) up to 40 V on VB, per AEC-Q100 stress testing.
L9663-TR-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 28-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- -
- Interface:
- SPI
- Voltage - Supply:
- 4.8V ~ 35V
- Supplier Device Package:
- 28-VFQFPN (5x5)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
L9663-TR-1 FAQ
1.How can I place an order for L9663-TR-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for L9663-TR-1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for L9663-TR-1 reliable?
The price and inventory of L9663-TR-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L9663-TR-1 is usually 5 days.
3.What payment methods are accepted for L9663-TR-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L9663-TR-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for L9663-TR-1?
L9663-TR-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your L9663-TR-1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for L9663-TR-1?
For technical support, including L9663-TR-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L9663-TR-1 requirements.
6.How does Aetrix verify that L9663-TR-1 is sourced from the original manufacturer or authorized distributors?
All L9663-TR-1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that L9663-TR-1 meets industry standards.
7.What is the process for return or replacement of L9663-TR-1?
All L9663-TR-1 units undergo pre-shipment inspection (PSI). If there is an issue with L9663-TR-1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The L9663-TR-1 part is unused and in its original packaging.
Return procedure for L9663-TR-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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