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STMicroelectronics STA2500DCTR
- Part No.:
- STA2500DCTR
- Manufacturer:
- STMicroelectronics
- Category:
- RF Transceiver ICs
- Package:
- 48-LFBGA
- Datasheet:
-
STA2500DCTR.pdf
- Description:
- IC RF TXRX+MCU BLE 48LFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,332
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Product details
Overview
STA2500DCTR from STMicroelectronics is a single-chip Bluetooth 2.1 + EDR ("Lisbon") baseband and RF transceiver IC optimized for automotive telematics and navigation systems. It integrates ARM7TDMI CPU, on-chip ROM/patch RAM, adaptive frequency hopping (AFH), eSCO support, and programmable Class 1.5/Class 2 transmit power up to +4 dBm. Designed for battery-powered in-vehicle units requiring low-power deep sleep modes and WLAN coexistence.
For engineers reviewing the STA2500DCTR datasheet, STA2500DCTR pinout, STA2500DCTR application, or STA2500DCTR equivalent, key selection criteria include HCI transport interface flexibility (UART/SPI/PCM), ultra-low-power architecture with three sleep levels, automotive-grade operating temperature (−40°C to +85°C), and hardware-accelerated Bluetooth 2.1 + EDR protocol stack compliance.
Technical Context
The STA2500DCTR implements a full Bluetooth controller compliant with V2.1 + EDR specification, featuring point-to-multipoint (7-slave scatternet), ACL/SCO/eSCO link support, and secure simple pairing. Its baseband core is licensed from Ericsson (EBC), and it includes dedicated hardware acceleration for packet boundary flag handling, pitch-period error concealment (PPEC), and channel quality driven data rate (CQDDR).
It supports dual-clock architecture: high-speed system clock (9.6–38.4 MHz) for digital processing and low-power clock (3.2 kHz/32 kHz/32.768 kHz) for timing-critical sleep/wake functions. The radio subsystem delivers Class 1.5 output power (>4 dBm) with auto-calibrated VCO and filters, and integrates hardware coexistence mechanisms (PTA, AWMA) for concurrent Bluetooth/WLAN operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bluetooth Version | Compliant with Bluetooth V2.1 + EDR ("Lisbon") - enables faster connection setup, extended inquiry response (EIR), sniff subrating, and secure simple pairing. |
| Transmit Power | Programmable Class 1.5 (≥4 dBm) and Class 2 - supports extended range in automotive cabin environments without external PA. |
| Operating Temp | −40°C to +85°C - qualified for under-hood and dashboard-mounted automotive electronics. |
| Supply Voltage | Core: 2.65–2.85 V; I/O: 1.65–2.85 V (BT_VIO_A), 1.17–2.85 V (BT_VIO_B) - enables flexible power domain partitioning and low-voltage interface compatibility. |
| Low-Power Modes | Three hierarchical sleep levels including deep sleep with host- or device-initiated wake-up - reduces average current to µA range during idle periods. |
| Interface Support | UART (up to 4 MHz), SPI (up to 13 MHz), PCM (voice), I²C (master), and 10 GPIOs - provides full HCI transport and peripheral control without external logic. |
| RF Performance | Adaptive frequency hopping (AFH) + CQDDR - dynamically avoids congested 2.4 GHz channels and maximizes throughput in noisy automotive RF environments. |
Pinout & Package
LFBGA48 (6 mm × 6 mm × 1.4 mm, 0.8 mm pitch) package with exposed thermal pad; RoHS-compliant, automotive-qualified reflow profile.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BT_RESETN | Active-low reset input | Asynchronous hardware reset; must be held low ≥100 ns after power stabilization to initialize internal state machines. |
| BT_WAKEUP | Wake-up request input | Allows host processor to exit STA2500DCTR from deep sleep mode; edge-triggered, Schmitt-triggered for noise immunity. |
| BT_REF_CLK_IN | System clock input | Accepts sine wave (0.27–1.8 Vpp) or digital clock (9.6–38.4 MHz); supports automatic detection and configuration via BT_VDD_CLD pin. |
| BT_LP_CLK | Low-power clock input | 3.2 kHz / 32 kHz / 32.768 kHz timing reference for sleep/wake scheduling and real-time clock functions. |
| BT_UART_TX / BT_UART_RX | HCI UART data lines | Full-duplex H4 transport layer interface; supports baud rates up to 4 Mbps - primary debug and control path in most automotive implementations. |
| BT_SPI_MOSI / MISO / SCLK / CS | HCI SPI interface | Enhanced H4 SPI transport supporting burst transfers and low-latency command/response - used where deterministic timing is critical. |
| BT_PCM_CLK / SYNC / DATA | PCM voice interface | Supports A-law/µ-law and linear PCM formats at 2.048 MHz - directly interfaces with automotive audio codecs for hands-free call processing. |
| BT_GPIO[0:9] | Configurable general-purpose I/O | Programmable as inputs/outputs with pull-up/down; used for antenna switching, status signaling, or peripheral enable control. |
Key Features
| Feature | Design Value |
|---|---|
| ARM7TDMI CPU + patch RAM | Enables field-upgradable firmware patches without ROM replacement - critical for post-production security updates and feature enhancements. |
| Hardware AFH & CQDDR | Real-time interference avoidance and dynamic data rate adaptation - maintains robust link quality in presence of Wi-Fi, USB 3.0, or radar emissions. |
| Dual wake-up mechanism | Host or Bluetooth controller can initiate wake-up - eliminates polling overhead and ensures deterministic latency for time-sensitive voice packets. |
| WLAN coexistence algorithms | Five configurable HW-assisted protocols (PTA, AWMA, etc.) - prevents cross-talk between collocated 2.4 GHz radios without software intervention. |
| Ultra-low-power deep sleep | Sub-10 µA quiescent current with retained RAM and fast wake-up (<1 ms) - extends battery life in portable navigation devices and emergency telematics modules. |
Applications
| Automotive Telematics | In-Vehicle Navigation |
|---|---|
|
Use Scenario: Integrated emergency call (eCall) and remote diagnostics module in OEM head units. IC Role / Device Role / Timing Role: Bluetooth controller handling secure pairing with mobile phone, transmitting GPS coordinates and crash sensor data over ACL links. Use Value: Meets UNECE R156 compliance via secure simple pairing and encrypted eSCO voice channel for operator handover. |
Use Scenario: Portable navigation device (PND) with Bluetooth hands-free calling and map update synchronization. IC Role / Device Role / Timing Role: Baseband processor managing simultaneous SCO voice and ACL data streams while maintaining <100 ms end-to-end latency. Use Value: Dual HCI transport (UART + PCM) enables concurrent voice call and firmware update without resource contention. |
| Infotainment Gateway | ADAS Data Logger |
|
Use Scenario: Central gateway bridging smartphone, rear-seat entertainment, and vehicle bus networks. IC Role / Device Role / Timing Role: Scatternet coordinator connecting up to 7 Bluetooth slaves (headset, media player, HUD display) with QoS-managed bandwidth allocation. Use Value: Sniff subrating and LSTO reduce host CPU load by >40% during inactive audio streaming sessions. |
Use Scenario: Crash-data recorder transmitting impact logs to paired technician tablet via Bluetooth. IC Role / Device Role / Timing Role: Low-power initiator establishing transient ACL link only during post-event upload; remains in deep sleep otherwise. Use Value: Sub-5 µA deep sleep current extends backup battery life to >72 hours - meets ISO 26262 ASIL-B monitoring requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Bluetooth controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CSR8510 A10 | Single-mode Bluetooth 2.1 + EDR; no integrated ARM CPU - requires external host for protocol stack execution. | Targeted at cost-sensitive consumer audio, not automotive-qualified; lacks −40°C to +85°C rating and deep sleep optimization. | Select when full-stack offload to host MCU is acceptable and AEC-Q100 qualification is unnecessary. |
| TI CC2564C | Bluetooth 4.0 dual-mode (BR/EDR + BLE); integrated ARM Cortex-M3; higher peak current (25 mA RX) vs. STA2500DCTR's 12 mA. | Designed for industrial IoT gateways; lacks automotive-specific features like eCall-certified eSCO and PPEC voice enhancement. | Select when BLE interoperability and future-proofing outweigh legacy Bluetooth 2.1 ecosystem compatibility. |
Compared with CSR8510 A10 and TI CC2564C, the STA2500DCTR uniquely balances automotive qualification, ultra-low-power deep sleep, and hardware-accelerated Lisbon features - making it optimal for safety-critical telematics where deterministic latency and long-term supply stability are mandatory.
Availability
STA2500DCTR is available at Aetrix Electronics and suitable for automotive telematics, in-vehicle navigation, and ADAS data loggers requiring stable component supply across extended product lifecycles.
Supply support for STA2500DCTR 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, specializing in automotive, industrial, and power management ICs with broad AEC-Q100-qualified portfolios.
The STA2500DCTR belongs to ST's automotive Bluetooth solutions line, engineered specifically for telematics and infotainment systems demanding high RF reliability, low-power autonomy, and seamless integration with existing vehicle ECUs.
FAQ
What is the maximum supported system clock frequency for STA2500DCTR?
The STA2500DCTR supports system clock frequencies of 9.6, 10, 13, 16, 16.8, 19.2, 26, 33.6, and 38.4 MHz. At 38.4 MHz, the baseband processor achieves optimal throughput for multi-link scatternet operation while maintaining timing margin for UART/SPI peripherals. Clock tolerance is ±20 ppm per specification.
Does STA2500DCTR support Bluetooth Low Energy (BLE)?
No. The STA2500DCTR implements Bluetooth Basic Rate/Enhanced Data Rate (BR/EDR) only, compliant with V2.1 + EDR ("Lisbon"). It does not include BLE physical layer or protocol stack functionality. BLE capability requires separate silicon such as ST's BlueNRG series.
How is Class 1 transmit power achieved without external PA?
The STA2500DCTR achieves Class 1.5 operation (≥4 dBm) using an integrated high-efficiency RF power amplifier and adaptive output matching. Class 1 compliance (≥10 dBm) requires external PA stages and is enabled via SW parameter download and specific pin configuration (BT_HVA/BT_HVD), as documented in Tables 19–21 of the datasheet.
Can STA2500DCTR operate with a 32.768 kHz crystal alone?
Yes - the BT_LP_CLK pin accepts 32.768 kHz for low-power timing, but this clock alone cannot run the baseband processor. A separate system clock (e.g., 16.8 MHz) must be applied to BT_REF_CLK_IN for active operation; the 32.768 kHz signal is used exclusively for deep sleep wake-up scheduling and RTC functions.
STA2500DCTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 48-LFBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- TxRx + MCU
- RF Family/Standard:
- Bluetooth
- Protocol:
- Bluetooth v2.1 +EDR
- Modulation:
- 8DPSK, DQPSK, GFSK
- Frequency:
- 2.4GHz
- Data Rate (Max):
- 3Mbps
- Power - Output:
- 8dBm
- Sensitivity:
- -88dBm
- Memory Size:
- -
- Serial Interfaces:
- I2C, JTAG, SPI, UART
- GPIO:
- 10
- Voltage - Supply:
- 1.65V ~ 2.85V
- Current - Receiving:
- 35.4mA
- Current - Transmitting:
- 23mA ~ 35.4mA
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 48-LFBGA (6x6)
STA2500DCTR FAQ
1.How can I place an order for STA2500DCTR through Aetrix?
Please submit a Request for Quotation (RFQ) for STA2500DCTR 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 STA2500DCTR reliable?
The price and inventory of STA2500DCTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STA2500DCTR is usually 5 days.
3.What payment methods are accepted for STA2500DCTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STA2500DCTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STA2500DCTR?
STA2500DCTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STA2500DCTR 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 STA2500DCTR?
For technical support, including STA2500DCTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STA2500DCTR requirements.
6.How does Aetrix verify that STA2500DCTR is sourced from the original manufacturer or authorized distributors?
All STA2500DCTR 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 STA2500DCTR meets industry standards.
7.What is the process for return or replacement of STA2500DCTR?
All STA2500DCTR units undergo pre-shipment inspection (PSI). If there is an issue with STA2500DCTR, 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 STA2500DCTR part is unused and in its original packaging.
Return procedure for STA2500DCTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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