My Inquiry
My Account
STMicroelectronics STA2500D
- Part No.:
- STA2500D
- Manufacturer:
- STMicroelectronics
- Category:
- RF Transceiver ICs
- Package:
- 48-LFBGA
- Datasheet:
-
STA2500D.pdf
- Description:
- IC RF TXRX+MCU BLE 48LFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,630
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
STA2500D 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 operation and rapid integration at HCI level.
For engineers reviewing the STA2500D datasheet, STA2500D pinout, STA2500D application, or STA2500D equivalent, key selection considerations include its automotive-grade operating temperature (−40°C to +85°C), dual-clock architecture (system clock up to 38.4 MHz + low-power 32.768 kHz), UART/SPI/PCM interface flexibility, deep-sleep power management, and WLAN coexistence support via PTA and multi-algorithm arbitration.
Technical Context
The STA2500D implements a fully integrated Bluetooth controller compliant with V2.1 + EDR, featuring Ericsson-licensed baseband core (EBC), hardware-accelerated ACL/SCO/eSCO link handling, and CQDDR (Channel Quality Driven Data Rate) for dynamic throughput optimization. Its RF section supports GFSK, π/4-DQPSK, and 8-DPSK modulation schemes with measured receiver sensitivity of −85 dBm (GFSK) and output power programmability across Class 1.5 and Class 2.
It employs an ultra-low-power architecture with three configurable sleep levels, dual wake-up capability (host- or Bluetooth-initiated), and auto-calibration for VCO and filters. Clocking is supported via digital or sine-wave system clock inputs (9.6–38.4 MHz) plus dedicated low-power clock input (3.2/32/32.768 kHz), enabling precise timing control in resource-constrained automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bluetooth Version | Compliant with Bluetooth 2.1 + EDR ("Lisbon") specification, supporting scatternet, secure simple pairing, sniff subrating, and extended inquiry response. |
| Operating Temperature | −40°C to +85°C ambient range - qualified for under-hood and dashboard-mounted automotive electronics. |
| Supply Voltage | Core supply: 2.65–2.85 V; I/O supply: 1.65–2.85 V (BT_VIO_A), 1.17–2.85 V (BT_VIO_B) - enables mixed-voltage system integration. |
| Transmit Power | Programmable up to +4 dBm (Class 1.5) and Class 2; supports Class 1 operation via external PA control signals. |
| Receiver Sensitivity | −85 dBm @ 0.1% BER (GFSK), −82 dBm (π/4-DQPSK), −79 dBm (8-DPSK) - ensures robust link budget in noisy vehicle RF environments. |
| Interface Speeds | UART up to 4 MHz; SPI up to 13 MHz; PCM at 2048 kHz - sufficient bandwidth for voice+data telematics stacks. |
| Low-Power Modes | Three-tiered sleep architecture including deep-sleep mode with host- or device-initiated wake-up - reduces average current to microampere range during idle. |
Pinout & Package
LFBGA48 package (6 mm × 6 mm × 1.4 mm, 0.8 mm pitch) with exposed thermal pad; RoHS-compliant, automotive-qualified construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BT_REF_CLK_IN | System clock input | Accepts sine-wave (0.27–1.8 Vpp) or digital clock (9.6–38.4 MHz); enables precise timing synchronization with host MCU or crystal oscillator. |
| BT_LP_CLK | Low-power clock input | Supports 3.2/32/32.768 kHz for wake-up timing and power-state coordination without waking main system clock domain. |
| BT_WAKEUP | Wake-up request input | Active-high signal allowing host processor to initiate recovery from deep-sleep mode; Schmitt-triggered for noise immunity. |
| BT_RESETN | Reset input | Active-low asynchronous reset; internal pull-up ensures defined state on power-up; compatible with automotive reset supervisors. |
| BT_UART_TX / BT_UART_RX | HCI UART data path | Full-duplex H4 transport layer interface; supports flow control handshake for reliable firmware download and command exchange. |
| BT_SPI_MOSI / MISO / SCLK / CSN | HCI SPI interface | Enhanced H4 SPI transport supporting up to 13 MHz; enables faster patch loading and reduced latency vs. UART in high-throughput applications. |
| BT_PCM_CLK / SYNC / DATA | Voice interface | PCM interface compliant with A-law/µ-law and linear modes; synchronizes audio streams between Bluetooth stack and codec or DSP. |
| BT_GPIO[0:9] | Configurable I/O | 10 flexible GPIOs usable for peripheral control, status signaling, or WLAN coexistence handshaking (e.g., PTA request/acknowledge). |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive Frequency Hopping (AFH) | Real-time channel classification and avoidance of congested 2.4 GHz bands - improves reliability in vehicles with multiple wireless systems. |
| WLAN Coexistence Algorithms | Five hardware-supported mechanisms (PTA, WLAN master, Bluetooth master, two-wire, AWMA) - eliminates need for software arbitration logic in dual-radio designs. |
| Patch RAM Architecture | On-chip writable RAM for field-upgradable firmware patches - enables post-production bug fixes and feature enhancements without hardware change. |
| Ultra-Low-Power Deep Sleep | Sub-10 µA quiescent current in deep-sleep mode with dual wake-up sources - extends battery life in portable navigation devices and emergency call modules. |
| Single-Supply Core + Flexible I/O | Internal regulators generate core voltage from single 2.7 V supply; independent I/O banks support 1.65–2.85 V logic - simplifies power design and PCB layout. |
Applications
| Automotive Telematics | In-Vehicle Navigation |
|---|---|
|
Use Scenario: Integration into embedded telematics control units (TCUs) for hands-free calling, remote diagnostics, and over-the-air (OTA) updates. IC Role / Device Role / Timing Role: Primary Bluetooth baseband and RF transceiver handling HCI transport, voice encoding/decoding via PCM, and secure pairing. Use Value: Meets automotive AEC-Q100 stress requirements and −40°C to +85°C operation; AFH and coexistence algorithms prevent call dropouts near Wi-Fi hotspots or cellular modems. |
Use Scenario: Enabling Bluetooth audio streaming and map update synchronization in portable or built-in navigation systems. IC Role / Device Role / Timing Role: Standalone Bluetooth subsystem managing SCO/eSCO links for voice, ACL for data, and low-latency PCM audio path to audio DAC. Use Value: −85 dBm receiver sensitivity ensures stable connection even inside metal vehicle cabins; programmable TX power allows tuning for antenna efficiency and regulatory compliance. |
| Emergency Call (eCall) Module | Infotainment Gateway |
|
Use Scenario: Supporting automatic crash notification (ACN) and manual SOS activation via Bluetooth-connected smartphone or built-in SIM module. IC Role / Device Role / Timing Role: Secure, low-power Bluetooth controller initiating encrypted voice calls and transmitting GPS coordinates over ACL links. Use Value: Deep-sleep mode with BT_LP_CLK wake-up maintains readiness while drawing <10 µA; secure simple pairing ensures trusted device association during critical events. |
Use Scenario: Acting as wireless bridge between head unit, rear-seat entertainment, and mobile devices in premium infotainment platforms. IC Role / Device Role / Timing Role: Multi-role Bluetooth node supporting simultaneous point-to-multipoint connections (up to 7 slaves) and scatternet topology. Use Value: Hardware-accelerated eSCO and CQDDR enable high-fidelity stereo audio streaming; 10 GPIOs allow custom control of display, sensors, and external amplifiers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Bluetooth baseband + RF transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CSR BC04-BlueCore4-External | Discrete baseband + RF chip pair; requires external crystal, LDOs, and matching network; no integrated patch RAM. | Higher BOM count and board area; lacks native deep-sleep wake-up arbitration and WLAN coexistence hardware. | Preferred only when legacy CSR toolchain compatibility is mandatory and cost-per-unit is secondary to design reuse. |
| TI CC2564C | Bluetooth 4.0 dual-mode (BR/EDR + BLE); higher peak current (25 mA RX), no automotive temp grade; uses QFN-64 package. | Not qualified for −40°C to +85°C operation; lacks Class 1.5 TX power option and dedicated low-power clock input. | Consider only for non-automotive consumer applications where BLE support is required and extended temperature range is unnecessary. |
Compared with CSR BC04 and TI CC2564C, the STA2500D delivers automotive-specific advantages: guaranteed operation across full industrial temperature range, hardware-enforced WLAN coexistence, ultra-low deep-sleep current, and integrated patch RAM for field-upgradable firmware - all in a compact LFBGA48 package.
Availability
STA2500D is available at Aetrix Electronics and suitable for automotive telematics, in-vehicle navigation, emergency call (eCall) modules, and infotainment gateways requiring stable component supply and long-term lifecycle support.
Supply support for STA2500D 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 technologies, with broad IP portfolios and AEC-Q100-qualified product lines.
The STA2500D belongs to ST's automotive Bluetooth SoC family, designed specifically to reduce system cost and time-to-market for embedded wireless connectivity in harsh vehicular environments.
FAQ
Does the STA2500D support Bluetooth Low Energy (BLE)?
No. The STA2500D implements Bluetooth Basic Rate/Enhanced Data Rate (BR/EDR) only, compliant with version 2.1 + EDR ("Lisbon"). It does not include BLE radio hardware, protocol stack, or associated features such as advertising packets or connection parameters negotiation used in Bluetooth 4.x and later.
What clock sources are required for full functionality?
Two clock sources are mandatory: a primary system clock (9.6–38.4 MHz, sine or digital) on BT_REF_CLK_IN for baseband and RF operation, and a low-power clock (3.2/32/32.768 kHz) on BT_LP_CLK to maintain timing integrity during deep-sleep mode and enable wake-up without reinitializing the main clock domain.
How is Class 1 transmit power achieved?
Class 1 operation (up to +20 dBm) is enabled externally using the STA2500D's Class 1 control signals (BT_PA_EN, BT_PA_SELx) to drive an external power amplifier. The IC itself delivers up to +4 dBm (Class 1.5) directly; Class 1 requires external PA biasing and matching circuitry coordinated via GPIO-controlled enable/select lines per Table 19–21.
Is the STA2500D pin-compatible with other ST Bluetooth ICs?
No. The STA2500D uses a proprietary LFBGA48 pinout optimized for automotive signal routing, power separation, and thermal performance. It is not pin-compatible with STA2499, STA2501, or any other ST Bluetooth device; PCB layout and firmware initialization must be designed specifically for this part.
STA2500D 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)
STA2500D FAQ
1.How can I place an order for STA2500D through Aetrix?
Please submit a Request for Quotation (RFQ) for STA2500D 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 STA2500D reliable?
The price and inventory of STA2500D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STA2500D is usually 5 days.
3.What payment methods are accepted for STA2500D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STA2500D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STA2500D?
STA2500D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STA2500D 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 STA2500D?
For technical support, including STA2500D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STA2500D requirements.
6.How does Aetrix verify that STA2500D is sourced from the original manufacturer or authorized distributors?
All STA2500D 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 STA2500D meets industry standards.
7.What is the process for return or replacement of STA2500D?
All STA2500D units undergo pre-shipment inspection (PSI). If there is an issue with STA2500D, 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 STA2500D part is unused and in its original packaging.
Return procedure for STA2500D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STA2500D Tags
-
ESP32-D0WD-V3
Espressif Systems
-
ESP8266EX
Espressif Systems
-
ESP32-S3
Espressif Systems
-
NRF24L01P-R7
Nordic Semiconductor ASA
-
NRF24L01P-R
Nordic Semiconductor ASA
-
ESP32-U4WDH
Espressif Systems
-
DA14531-00000OG2
Renesas
-
ESP32-C6FH4
Espressif Systems
-
DA14531-00000FX2
Renesas
-
NRF24L01P-T
Nordic Semiconductor ASA
-
NRF52810-QCAA-R
Nordic Semiconductor ASA
-
ESP32-S3FN8
Espressif Systems
Tech Hub
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
