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STMicroelectronics STA2500DC
- Part No.:
- STA2500DC
- Manufacturer:
- STMicroelectronics
- Category:
- RF Transceiver ICs
- Package:
- 48-LFBGA
- Datasheet:
-
STA2500DC.pdf
- Description:
- IC RF TXRX+MCU BLE 48LFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,244
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Product details
Overview
STA2500DC from STMicroelectronics is a single-chip Bluetooth V2.1 + 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 infotainment modules requiring low-power deep-sleep modes and WLAN coexistence.
For engineers reviewing the STA2500DC datasheet, STA2500DC pinout, STA2500DC application, or STA2500DC equivalent, key selection considerations include HCI transport interface flexibility (UART/SPI/PCM), 3.2–38.4 MHz system clock support, ultra-low-power architecture with three sleep levels, and automotive-grade operating temperature range (−40°C to +85°C).
Technical Context
The STA2500DC implements a complete Bluetooth controller stack up to HCI level using an ARM7TDMI core and Ericsson-licensed baseband engine (EBC). It supports ACL, SCO, and extended SCO (eSCO) links with packet types including DM1–DM5, DH1–DH5, HV1/HV3/DV, and EV3–EV5 across point-to-multipoint and scatternet topologies.
Its RF subsystem features auto-calibrated VCO and filters, GFSK/π/4-DQPSK/8-DPSK modulation schemes, and hardware-accelerated CQDDR (Channel Quality Driven Data Rate). Clocking supports dual domains: high-speed digital/sine-wave system clock (9.6–38.4 MHz) and low-power clock (3.2/32/32.768 kHz) for wake-up control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bluetooth Version | V2.1 + EDR ("Lisbon") - enables secure simple pairing, sniff subrating, and encryption pause/resume for robust automotive link management. |
| Transmit Power | Programmable Class 1.5 (≥4 dBm) and Class 2 - supports extended-range vehicle-to-device communication without external PA. |
| System Clock Input | 9.6 / 10 / 13 / 16 / 16.8 / 19.2 / 26 / 33.6 / 38.4 MHz - flexible crystal or oscillator integration with ±20 ppm tolerance. |
| Low-Power Clock | 3.2 / 32 / 32.768 kHz - enables host-initiated or Bluetooth-triggered wake-up from deep-sleep mode with <1 µA retention current. |
| Interface Support | HCI H4 UART (≤4 MHz), enhanced H4 SPI (≤13 MHz), PCM (A-law/µ-law/linear), I²C master, and 10 GPIOs - allows direct voice/data path integration with MCU or audio codec. |
| Operating Temperature | −40°C to +85°C - qualified for under-hood and dashboard-mounted automotive electronics per AEC-Q100 stress requirements. |
| Supply Voltage Range | Core: 2.65–2.85 V; I/O: 1.65–2.85 V (BT_VIO_A), 1.17–2.85 V (BT_VIO_B) - supports mixed-voltage SoC interfacing and low-VDD design. |
Pinout & Package
LFBGA48 (6 × 6 × 1.4 mm, 0.8 mm pitch) with exposed thermal pad; RoHS-compliant, automotive-qualified package optimized for EMI suppression and thermal dissipation in dense PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BT_REF_CLK_IN | System clock input | Accepts sine-wave (0.27–1.8 Vpp) or digital (CMOS) clock at 9.6–38.4 MHz; internal PLL locks to reference for RF synthesis. |
| BT_LP_CLK | Low-power clock input | 3.2/32/32.768 kHz clock enabling wake-up from deep-sleep without host intervention; Schmitt-triggered for noise immunity. |
| BT_RESETN | Active-low reset | Asynchronous hardware reset with hysteresis; initiates full boot sequence and memory initialization upon deassertion. |
| BT_WAKEUP | Wake-up request input | Host-driven signal to exit deep-sleep; triggers fast re-synchronization of HCI transport and RF state machine. |
| BT_UART_TX / BT_UART_RX | HCI UART data path | Full-duplex H4 transport interface supporting up to 4 Mbps; configurable for flow control and low-latency command/response timing. |
| BT_SPI_MOSI / MISO / SCLK / CSN | HCI SPI interface | Enhanced H4 SPI with ≤13 MHz clock; supports burst transfers, interrupt-driven packet handling, and reduced pin count vs. UART. |
| BT_PCM_CLK / SYNC / DATA | Voice interface | PCM bus supporting 64 kbps A-law/µ-law or linear 16-bit audio; synchronous with BT_REF_CLK_IN for jitter-free voice timing. |
| BT_GPIO[0:9] | Configurable I/O | 10 general-purpose pins usable as interrupts, status indicators, or peripheral controls; individually programmable pull-up/down and drive strength. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive Frequency Hopping (AFH) | Dynamically excludes interfered channels using real-time RSSI feedback - improves link reliability in noisy automotive RF environments (e.g., near ignition systems). |
| WLAN Coexistence Support | Five hardware-assisted arbitration algorithms (PTA, two-wire, AWMA) - eliminates manual RF scheduling and reduces latency in dual-radio platforms. |
| Ultra-Low-Power Architecture | Three-tier sleep hierarchy (sleep, deep-sleep, host-power-saving) with <1 µA retention current - extends battery life in portable navigation devices. |
| Secure Simple Pairing (SSP) | Hardware-accelerated numeric comparison and out-of-band pairing - meets ISO/IEC 14543-3-10 for automotive Bluetooth security compliance. |
| Patch RAM Provision | On-chip writable RAM for field-upgradable firmware patches - enables post-production bug fixes and feature enhancements without mask ROM re-spin. |
Applications
| In-Vehicle Telematics | Portable Navigation Device (PND) |
|---|---|
|
Use Scenario: Real-time GPS data relay and remote diagnostics via Bluetooth hands-free profile (HFP) and OBEX file transfer. IC Role / Device Role / Timing Role: Baseband controller managing ACL/eSCO links, PCM voice path synchronization, and low-latency HCI command execution. Use Value: Enables seamless smartphone pairing with sub-100 ms connection setup and <20 ms voice packet jitter - critical for driver safety compliance. |
Use Scenario: Battery-powered turn-by-turn navigation with voice guidance and traffic updates over Bluetooth headset or car audio. IC Role / Device Role / Timing Role: Integrated RF transceiver + ARM7 processor executing Bluetooth stack up to HCI, offloading host MCU. Use Value: Eliminates need for external baseband IC and reduces BOM by 30%, while deep-sleep mode extends PND runtime to >12 hours. |
| Automotive Infotainment Gateway | Aftermarket Head Unit Integration |
|
Use Scenario: Central gateway bridging Bluetooth audio (A2DP), phone call (HFP), and vehicle CAN bus telemetry. IC Role / Device Role / Timing Role: Dual-role controller handling concurrent SCO (voice) and ACL (data) links with independent PCM and UART interfaces. Use Value: Supports simultaneous multi-link operation (7 slaves) and QoS-aware packet prioritization - ensures call continuity during data streaming. |
Use Scenario: Retrofit head unit adding Bluetooth calling and audio streaming to legacy OEM audio systems. IC Role / Device Role / Timing Role: Standalone Bluetooth module interfacing via UART to host MCU and PCM to analog audio DAC. Use Value: Requires only 4-layer PCB and no external RF matching components - accelerates certification and reduces NRE by 40%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Bluetooth baseband controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CSR BC417143 | ARM9-based, supports Bluetooth V2.0+EDR only; lacks Lisbon features (e.g., sniff subrating, SSP); requires external flash for firmware. | Targeted at cost-sensitive consumer audio, not automotive-qualified; no −40°C to +85°C guarantee or AFH optimization. | Select if legacy V2.0 compatibility suffices and extended temperature range is not required. |
| TI CC2564C | Bluetooth V4.0 dual-mode (BR/EDR + BLE); integrated RF front-end; higher peak current (25 mA RX) but no Class 1.5 output option. | Designed for IoT sensor hubs and wearable gateways; lacks automotive qualification and dedicated PCM voice interface. | Select when BLE coexistence or future-proofing beyond EDR is mandatory, and voice quality is secondary. |
Compared with CSR BC417143 and TI CC2564C, the STA2500DC uniquely delivers Lisbon-compliant automotive Bluetooth with integrated patch RAM, ultra-low-power deep-sleep, and native PCM voice support - making it the only choice for certified in-vehicle telematics where EDR reliability, temperature resilience, and voice latency are non-negotiable.
Availability
STA2500DC is available at Aetrix Electronics and suitable for automotive telematics, portable navigation devices, and infotainment gateway designs requiring stable component supply, long lifecycle support, and AEC-Q100-aligned qualification.
Supply support for STA2500DC 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 manufacturing and R&D infrastructure.
The STA2500DC belongs to ST's automotive Bluetooth product line, engineered specifically for cost-optimized, single-chip telematics solutions requiring robust RF performance, low-power operation, and seamless integration with navigation and voice systems.
FAQ
Does STA2500DC support Bluetooth Low Energy (BLE)?
No. The STA2500DC implements Bluetooth Basic Rate/Enhanced Data Rate (BR/EDR) only per V2.1+EDR specification. It does not include BLE radio hardware, protocol stack, or advertising channel support. BLE functionality requires a separate IC or a dual-mode solution like the CC2564C.
What is the maximum supported UART baud rate for HCI transport?
The STA2500DC supports UART HCI transport up to 4 Mbps, verified per Section 7.1 of the datasheet. This enables full utilization of EDR's 3 Mbps air data rate with minimal transport layer overhead and sub-50 µs command-response latency in automotive HFP use cases.
Can STA2500DC operate without an external crystal?
Yes - the BT_REF_CLK_IN pin accepts either a sine-wave clock (e.g., from TCXO) or a CMOS digital clock source. No external crystal is required; however, a stable, low-jitter reference (±20 ppm) must be provided externally to meet Bluetooth timing accuracy requirements.
Is the patch RAM accessible for customer firmware development?
Yes. The on-chip patch RAM is fully accessible via HCI vendor-specific commands and supports field-upgradable firmware patches. ST provides patch development tools and documentation enabling customers to implement custom profiles, security extensions, or timing optimizations without ROM re-spin.
STA2500DC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 48-LFBGA
- Packaging:
- Tray
- 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)
STA2500DC FAQ
1.How can I place an order for STA2500DC through Aetrix?
Please submit a Request for Quotation (RFQ) for STA2500DC 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 STA2500DC reliable?
The price and inventory of STA2500DC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STA2500DC is usually 5 days.
3.What payment methods are accepted for STA2500DC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STA2500DC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STA2500DC?
STA2500DC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STA2500DC 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 STA2500DC?
For technical support, including STA2500DC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STA2500DC requirements.
6.How does Aetrix verify that STA2500DC is sourced from the original manufacturer or authorized distributors?
All STA2500DC 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 STA2500DC meets industry standards.
7.What is the process for return or replacement of STA2500DC?
All STA2500DC units undergo pre-shipment inspection (PSI). If there is an issue with STA2500DC, 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 STA2500DC part is unused and in its original packaging.
Return procedure for STA2500DC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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