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STMicroelectronics L9663-TR
- Part No.:
- L9663-TR
- Manufacturer:
- STMicroelectronics
- Category:
- Specialized
- Package:
- 32-TQFP Exposed Pad
- Datasheet:
-
L9663-TR.pdf
- Description:
- IC INTERFACE SPECIALIZED 32TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,026
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Product details
Overview
L9663-TR 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 with Manchester-coded data transmission at 125 kbps (configurable to 83.3 kbps or 189 kbps), operating from 4.8 V to 35 V supply, and rated for −40°C to +140°C ambient temperature. It integrates FLL-based timing control, charge-pump-assisted VAS pre-regulation, and synchronous pulse generation for ECU-to-sensor command delivery in safety-critical chassis and powertrain systems.
For engineers reviewing the L9663-TR datasheet, L9663-TR pinout, L9663-TR application, or L9663-TR equivalent, key selection criteria include dual-channel PSI5 compliance, sync pulse bootstrap capability, SPI register address multiplexing, reverse voltage protection, and short-to-ground tolerance with ±1.5 V ground shift - all critical for robust sensor hub design in ISO 26262-compliant ECUs.
Technical Context
The L9663-TR implements two independent PSI5 transceiver channels with fully autonomous activation/deactivation via SPI commands. Each channel features a dedicated Manchester decoder with mark-space error correction (Mode 1) or raw bit-stream output (Mode 2), integrated FLL for ±0.5% timing accuracy over temperature, and bootstrap circuits generating VSYNCx up to 5.2 V for synchronous pulse generation.
Its power architecture includes a VAS pre-regulator with external FET drive capability (7.6 V/5.3 V selectable), integrated charge pump for low-VASSUP operation, and independent monitoring of VAS, VSYNCx, and PSIx line voltages. Diagnostics cover PSIx under/over-voltage, reverse voltage detection, short-circuit identification, and time-slot consistency checks per PSI5 specification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data rate | 125 kbps nominal (83.3 / 189 kbps selectable); enables real-time sensor streaming in high-dynamic automotive applications. |
| Supply range (VB) | 4.8 V to 35 V; supports direct battery connection across cold-crank (4.8 V) to load-dump (35 V) conditions without external protection. |
| Operating temp | −40°C to +140°C; qualified for under-hood placement in engine control and transmission modules. |
| PSI5 revision | Compliant with v1.3 and v2.x; supports both masked-sync and variable-duration sync pulse protocols for legacy and next-gen sensors. |
| SPI interface | 32-bit with address multiplexing; reduces MCU GPIO count and simplifies register access in multi-transceiver configurations. |
| FLL accuracy | ±0.5% over full temperature range; eliminates need for external crystal while maintaining strict PSI5 timing budget compliance. |
| VAS regulation | Integrated pre-regulator + charge pump; delivers stable 7.6 V or 5.3 V to sensors from wide-input VB, enabling single-supply ECU designs. |
Pinout & Package
Package: TQFP32EP (7×7×1.0 mm, exposed pad down). Pin functions validated per STMicroelectronics DS11401 Rev 7, Table 3 and Figure 3 (top-view pin diagram).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Digital I/O supply | Selects 3.3 V or 5 V logic level for SPI and interrupt outputs; decoupled from analog VB supply for noise isolation. |
| VB | Main power input | Supplies internal analog/digital blocks and enables operation across full automotive battery range (4.8–35 V). |
| VASSUP | VAS pre-regulator input | Feeds integrated charge pump and external FET driver; determines VAS output voltage (5.3 V or 7.6 V) and current capability. |
| PSI1 / PSI2 | PSI5 bidirectional interface | Carries modulated sensor current signal and sync pulses on same wire; includes integrated current limiting and voltage clamping. |
| SYNC1 / SYNC2 | Sync pulse trigger input | Accepts external µC-generated sync triggers or enables auto-timer mode; initiates synchronous sensor readout sequences. |
| BH1 / BL1 / BH2 / BL2 | Bootstrap capacitor terminals | Supports charge-pump-based VSYNCx generation (up to 5.2 V) for compliant sync pulse amplitude in synchronous mode. |
| GND1 / GND2 | Analog ground returns | Separate substrate/analog ground pins minimize coupling between sensitive PSI5 receiver paths and digital switching noise. |
| SDO / SDI / SCK / CS | SPI interface signals | Full-duplex 32-bit SPI with address multiplexing; supports daisy-chaining and register-level diagnostics access. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent PSI5 channels | Each channel configurable as Mode 1 (on-chip Manchester decode + error correction) or Mode 2 (raw bit-stream pass-through to µC), enabling flexible system partitioning. |
| Integrated FLL timing module | Replaces external crystal oscillator; maintains <±0.5% clock accuracy across −40°C to +140°C, meeting PSI5 v2.x jitter requirements without added BOM cost. |
| VAS pre-regulator with charge pump | Delivers regulated 5.3 V or 7.6 V to sensors from VB input; charge pump extends functionality below 6 V VASSUP, supporting start-stop system operation. |
| Comprehensive fault diagnostics | Real-time monitoring of PSIx line voltage, reverse polarity, short-to-ground (±1.5 V tolerant), VAS/VSYNCx supply integrity, and sensor data consistency per frame. |
| Sync pulse bootstrap architecture | Dedicated BH/BL pins per channel generate compliant 3.5 V step sync pulses (v1.3) or variable-width pulses (v2.x) without external discrete components. |
Applications
| Engine Knock Sensor Interface | Brake Pressure Sensor Hub |
|---|---|
|
Use Scenario: High-speed acquisition of piezoelectric knock sensor signals in gasoline direct injection engines, requiring precise timing alignment and immunity to ignition noise. IC Role / Device Role / Timing Role: Dual-channel PSI5 transceiver providing synchronized sampling of multiple knock sensors via VSYNCx-triggered acquisition windows and on-chip Manchester decoding. Use Value: Eliminates external timing ICs and discrete protection circuitry while maintaining <1 µs inter-channel skew - critical for cylinder-specific knock detection. |
Use Scenario: Aggregating pressure readings from four ABS wheel sensors and master cylinder sensor in a centralized brake ECU with minimal wiring harness weight. IC Role / Device Role / Timing Role: PSI5 bus controller managing bussed-mode communication, automatic sensor initialization storage, and fault-isolated channel shutdown on single-sensor failure. Use Value: Reduces sensor wiring by 60% vs. analog interfaces and enables diagnostic traceability per sensor via unique frame CRC and timestamp registers. |
| Air Suspension Height Sensors | Transmission Oil Temperature Array |
|
Use Scenario: Monitoring four corner height sensors in adaptive air suspension systems where EMC robustness and ground-shift tolerance are essential due to chassis flex and corrosion. IC Role / Device Role / Timing Role: PSI5 transceiver with ±1.5 V ground-shift tolerance and high-EMC-robust receiver front-end, supporting asynchronous polling during vehicle static calibration. Use Value: Maintains valid communication despite body-ground potential differences exceeding 1 V - preventing false sensor dropouts during suspension travel. |
Use Scenario: Reading temperature data from six distributed oil sump and gear-contact-point sensors in an 8-speed automatic transmission under high thermal gradient conditions. IC Role / Device Role / Timing Role: Dual-channel transceiver operating in Mode 2 (raw Manchester stream) to offload decoding to transmission MCU with dedicated PSI5 peripheral. Use Value: Enables deterministic latency <50 µs per sensor frame and concurrent channel operation - required for real-time oil viscosity compensation algorithms. |
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 charge pump; requires external VAS regulator; FLL not specified. | Limited to simpler sensor nodes; lacks dual-channel redundancy and bootstrap sync pulse generation for complex ECU architectures. | Choose when cost-sensitive single-sensor applications dominate and external regulation is already present. |
| Infineon TLE493D-A000 | Integrated 3D magnetic sensor with embedded PSI5 transmitter only; no receiver or dual-channel capability. | Designed for self-contained smart sensors, not ECU-side transceiver functions like sync pulse generation or sensor aggregation. | Not a functional substitute - suitable only as end-node sensor, not as ECU interface IC. |
Compared with MC33664 and TLE493D-A000, the L9663-TR uniquely combines dual-channel PSI5 transceivers, integrated VAS pre-regulation with charge pump, and FLL-based timing - making it the only option for high-integration, safety-critical ECU sensor hubs requiring synchronous multi-sensor coordination and supply resilience.
Availability
L9663-TR is available at Aetrix Electronics and suitable for engine control units, brake ECU designs, air suspension systems, and transmission control modules requiring stable component supply across extended automotive lifecycles.
Supply support for L9663-TR 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 headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power management ICs, and automotive-grade analog products since 1987.
The L9663 belongs to ST's Automotive Interface & Connectivity product line, engineered specifically for robust, AEC-Q100 qualified sensor communication in safety-critical powertrain and chassis ECUs.
FAQ
What PSI5 protocol versions does the L9663-TR support?
The L9663-TR natively supports both PSI5 v1.3 and v2.x revisions, including masked-sync (v1.3) and variable-duration sync pulse (v2.x) modes. It handles frame structure differences, data word lengths (8–28 bits), and timing budgets per revision without firmware update - verified in DS11401 Rev 7 Section 1.2 and Table 14.
How does the L9663-TR handle voltage transients during cold-crank or load-dump events?
It operates continuously across 4.8 V to 35 V VB supply, with internal protection circuits clamping PSIx interface pins and limiting current during overvoltage. The VAS pre-regulator remains functional down to 4.8 V, and the integrated charge pump sustains VAS output during sub-6 V VASSUP conditions - confirmed in Sections 2.2 and 2.4 of the datasheet.
Can the L9663-TR operate in both synchronous and asynchronous PSI5 modes simultaneously?
No - each channel operates in either synchronous or asynchronous mode, but both channels may be configured independently. Synchronous mode requires VSYNCx generation (enabled via SPI) and is used for time-aligned sensor reads; asynchronous mode uses free-running sensor transmission. Configuration is per-channel via SPI register 0x04 (DS11401 Rev 7, Section 5.1).
What is the purpose of the BH1/BL1 and BH2/BL2 pins?
These are bootstrap capacitor terminals for dedicated charge-pump circuits that generate VSYNCx voltage (up to 5.2 V) for compliant synchronous pulse generation. BH1/BL1 serve Transceiver 1; BH2/BL2 serve Transceiver 2. They enable precise 3.5 V-step pulses per PSI5 v1.3 or programmable-width pulses per v2.x without external drivers - detailed in Section 3.5 and Figure 30.
L9663-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 32-TQFP Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- -
- Interface:
- SPI
- Voltage - Supply:
- 4.8V ~ 35V
- Supplier Device Package:
- 32-TQFP (7x7)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
L9663-TR FAQ
1.How can I place an order for L9663-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for L9663-TR 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 reliable?
The price and inventory of L9663-TR 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 is usually 5 days.
3.What payment methods are accepted for L9663-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L9663-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for L9663-TR?
L9663-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your L9663-TR 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?
For technical support, including L9663-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L9663-TR requirements.
6.How does Aetrix verify that L9663-TR is sourced from the original manufacturer or authorized distributors?
All L9663-TR 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 meets industry standards.
7.What is the process for return or replacement of L9663-TR?
All L9663-TR units undergo pre-shipment inspection (PSI). If there is an issue with L9663-TR, 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 part is unused and in its original packaging.
Return procedure for L9663-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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