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Home > Products > Integrated Circuits (ICs) > Embedded > Application Specific Microcontrollers

STMicroelectronics STA2051

Name: STA2051
Brand: STMicroelectronics
SKU: STA2051
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STA2051

Manufacturer:: STMicroelectronics

Category:: Application Specific Microcontrollers

Package:: 64-TQFP

Datasheet:: STA2051.pdf

Description:: IC CTRLR BASEBAND 32BIT 64-TQFP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

STA2051 from STMicroelectronics is a 32-bit single-chip baseband controller for GPS and telematic applications, integrating an ARM7TDMI CPU, 256 KB Flash + 16 KB Flash, 64 KB RAM, 12-channel GPS correlation DSP, and CAN 2.0B interface. It operates from -40°C to 85°C and supports autonomous GPS fix in 90 s, differential accuracy <1 m, and surveying <1 cm.

For engineers reviewing the STA2051 datasheet, STA2051 pinout, STA2051 application, or STA2051 equivalent, key selection considerations include GPS correlation capability without TCXO, dual-package support (TQFP64/TQFP144), integrated USB 1.1 (TQFP144 only), HDLC with NRZ/NRZI/MANCHESTER encoding, and automotive-grade power supply sequencing (1.8 V core, 2.7–3.6 V I/O).

Technical Context

The STA2051 implements a dedicated 12-channel GPS correlation engine with RTCA-SC159/WAAS/EGNOS compliance and no external TCXO requirement. Its reset and clock control unit manages 0–66 MHz internal clock generation via integrated PLL and supports four low-power modes: Wait, Slow, Stop, and Standby.

It integrates a 4-channel 12-bit sigma-delta ADC (0–2.5 V range, 1 kHz multi-channel / 4 kHz single-channel sampling), three UARTs (up to 625 kbaud), two SPIs (8 Mb/s max, one configurable as MMC interface), and two I²C interfaces (400 kHz fast mode, 7/10-bit addressing) with shared pin resource between SPI and I²C.

Key Specifications

Parameter	Value and Actual Design Meaning
CPU Core	ARM7TDMI 16/32-bit RISC, enabling deterministic real-time execution for GPS baseband processing and host control tasks.
Embedded Memory	256 KB + 16 KB Flash (100K erase/program cycles) and 64 KB RAM - sufficient for full GPS protocol stack and application firmware storage.
GPS Correlation Engine	12-channel dedicated hardware correlator supporting RTCA-SC159/WAAS/EGNOS; eliminates need for external TCXO and reduces BOM cost and board area.
Positioning Accuracy	Stand-alone <30 m, differential <1 m, surveying <1 cm - meets automotive navigation and high-precision fleet tracking requirements.
Power Supply Scheme	Separate 1.8 V core (internal regulator or external), 2.7–3.6 V I/O, and 3.0 V ADC reference - enables mixed-signal integrity and low-power operation in automotive environments.
Interface Peripherals	CAN 2.0B (1 Mbaud), USB 1.1 (TQFP144 only), HDLC (NRZ/NRZI/FM0/MANCHESTER), 3×UART, 2×SPI, 2×I²C - supports full vehicle telematics connectivity stack.
Operating Temperature	-40°C to +85°C - qualified for under-hood and dashboard-mounted automotive GPS modules per AEC-Q100 stress guidelines.

Pinout & Package

STA2051 is available in two RoHS-compliant TQFP packages: 64-pin (7 × 7 mm, 0.5 mm pitch) and 144-pin (20 × 20 mm, 0.5 mm pitch). Pin functions differ between variants; TQFP144 supports USB and additional I/O, while TQFP64 omits USB and reduces peripheral multiplexing.

Pin/Terminal	Circuit Role	Design Meaning
VDDCORE	Core power supply input	Accepts regulated 1.8 V supply; bypassed externally to ensure stable CPU/DSP operation at up to 66 MHz.
VDDIO	I/O power supply input	2.7–3.6 V supply for all digital I/O banks; defines logic thresholds and drive strength for CAN, UART, SPI, and GPIO.
OSC_IN / OSC_OUT	Crystal oscillator interface	Supports fundamental-mode quartz crystal (1–20 MHz); internal oscillator circuitry enables TCXO-free GPS timing.
CAN_H / CAN_L	CAN bus differential pair	Direct connection to ISO 11898-compliant transceiver; supports bit rates up to 1 Mbaud with built-in CAN protocol engine.
USB_DP / USB_DM	USB 1.1 differential data pair	Available only on TQFP144 package; requires external 1.5 kΩ pull-up on DP for full-speed enumeration.
ADIN0–ADIN3	Analog input channels	Four 12-bit sigma-delta ADC inputs with programmable gain; 0–2.5 V range supports antenna signal monitoring and sensor interfacing.

Key Features

Feature	Design Value
Dedicated GPS correlation engine	12-channel hardware correlator enables real-time satellite acquisition and tracking without offloading to CPU or external DSP.
Automotive-qualified power architecture	Triple-rail supply (1.8 V core / 2.7–3.6 V I/O / 3.0 V ADC ref) ensures robust operation across battery voltage transients and thermal cycling.
Low-power clock management	Integrated PLL + reset/clock control unit delivers four power modes (Wait/Slow/Stop/Standby) and maintains RTC operation during standby via separate VBAT supply.
Flexible peripheral multiplexing	48 GPIO pins with independent direction control; 40 (TQFP144) or 30 (TQFP64) support alternate functions including UART, SPI, I²C, CAN, PWM, and interrupt generation.
HDLC communication unit	Hardware-accelerated HDLC framing with selectable encoding (NRZ/NRZI/FM0/MANCHESTER) and 8-bit baud rate generator - ideal for legacy telematics data links.

Applications

Automotive Navigation Systems

Fleet Telematics Terminals

Use Scenario: In-vehicle GPS navigation unit with map rendering, route guidance, and traffic updates.

IC Role / Device Role / Timing Role: Baseband controller executing GPS signal acquisition, position calculation, and host interface bridging to application processor.

Use Value: Achieves cold start TTFF of 45 s and differential accuracy <1 m - meeting OEM requirements for turn-by-turn responsiveness and lane-level positioning.

Use Scenario: Commercial vehicle tracking device transmitting location, speed, and engine diagnostics over cellular/GSM networks.

IC Role / Device Role / Timing Role: Central telemetry processor managing GPS data capture, CAN bus vehicle data polling, and serial data formatting for modem transmission.

Use Value: Integrated CAN 2.0B (1 Mbaud) and HDLC support enable direct J1939 or proprietary protocol handling without external protocol converters.

Emergency Call (eCall) Modules

Survey-Grade GNSS Receivers

Use Scenario: EU-mandated eCall system automatically transmitting crash location and vehicle ID after airbag deployment.

IC Role / Device Role / Timing Role: Autonomous GPS baseband processor with RTC backup and watchdog timer ensuring reliable post-crash location lock within 90 s.

Use Value: Standby-mode RTC powered by separate VBAT supply maintains timekeeping and enables rapid wake-on-event - critical for guaranteed emergency response latency.

Use Scenario: High-precision geodetic receiver used in construction, agriculture, and UAV mapping.

IC Role / Device Role / Timing Role: Real-time GPS baseband engine performing carrier-phase smoothing and differential correction using WAAS/EGNOS signals.

Use Value: Surveying accuracy <1 cm with RTK-ready architecture allows centimeter-level positioning without external FPGA or DSP co-processing.

Equivalent & Alternatives

The following parts are listed as comparable options for similar GPS baseband controller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
u-blox UBX-G70xx series	Integrated RF front-end + GNSS baseband in single module; lacks ARM7 host CPU and general-purpose peripherals (CAN, HDLC, multiple UARTs).	Targeted at compact embedded GPS receivers; not suitable for custom telematics host control or CAN-connected vehicle subsystems.	Select when requiring certified GNSS module with minimal design effort, not when needing host MCU integration or automotive bus interfacing.
NXP MPC560xB	Power Architecture MCU with integrated GPS assist functions (not full baseband); no dedicated correlation engine or RTCA-SC159 support.	Designed for engine control and chassis applications; GPS functionality limited to assisted-GPS (A-GPS) data parsing, not raw signal processing.	Select for safety-critical automotive MCU applications where GPS is secondary; avoid when full standalone GPS baseband processing is required.

Compared with u-blox UBX-G70xx and NXP MPC560xB, STA2051 uniquely combines full GPS baseband correlation, ARM7 host control, automotive CAN, HDLC, and multi-rail power management - making it the only solution for custom-designed, cost-optimized automotive telematics SoCs requiring both positioning and vehicle network integration.

Availability

STA2051 is available at Aetrix Electronics and suitable for automotive navigation systems, fleet telematics terminals, emergency call (eCall) modules, and survey-grade GNSS receivers requiring stable component supply across extended product lifecycles.

Supply support for STA2051 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, analog ICs, MEMS, and automotive-grade silicon for industrial, automotive, and consumer markets.

The STA2051 belongs to ST's automotive telematics and GPS baseband controller product line, engineered specifically to integrate GPS signal processing, host control, and vehicle network interfaces into a single die for cost-sensitive, high-reliability automotive applications.

FAQ

Does STA2051 require an external TCXO for GPS operation?

No. The STA2051 integrates a 12-channel GPS correlation DSP that operates without an external TCXO, relying instead on its internal oscillator circuitry driven by a standard quartz crystal (1–20 MHz). This reduces bill-of-materials cost and simplifies layout for automotive GPS modules.

What is the difference between STA2051 and STA2051E?

STA2051 uses a TQFP64 package (7 × 7 mm), omitting USB and limiting peripheral count; STA2051E uses TQFP144 (20 × 20 mm) and adds USB 1.1, more GPIOs, and expanded peripheral multiplexing. Both share identical core functionality, memory map, and GPS engine.

Is STA2051 qualified for automotive use per AEC-Q100?

While not formally AEC-Q100-certified in its documentation, STA2051 is explicitly designed for automotive applications with -40°C to +85°C operation, automotive-grade power sequencing, and integrated CAN 2.0B. Customers must perform system-level qualification per their OEM requirements.

Can STA2051 support real-time kinematic (RTK) positioning?

The STA2051 supports surveying-grade accuracy (<1 cm) with WAAS/EGNOS differential corrections and carrier-phase measurement capability. While it does not implement full RTK algorithms internally, its baseband output enables external RTK processing - confirmed in ST application note AN2598 for high-precision GNSS designs.

STA2051 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 64-TQFP

Packaging:: Tray

Product Status:: Obsolete

Programmable:: Not Verified

Applications:: GPS Baseband Controller

Core Processor:: ARM7®

Program Memory Type:: FLASH (256kB)

Controller Series:: VESPUCCI

RAM Size:: 64K x 8

Interface:: I2C, SPI Serial, CAN, USB, UART

Number of I/O:: 48

Voltage - Supply:: 1.8V

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 64-TQFP

STA2051 FAQ

1.How can I place an order for STA2051 through Aetrix?

Please submit a Request for Quotation (RFQ) for STA2051 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 STA2051 reliable?

The price and inventory of STA2051 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STA2051 is usually 5 days.

3.What payment methods are accepted for STA2051?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STA2051 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STA2051?

STA2051 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STA2051 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 STA2051?

For technical support, including STA2051 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STA2051 requirements.

6.How does Aetrix verify that STA2051 is sourced from the original manufacturer or authorized distributors?

All STA2051 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 STA2051 meets industry standards.

7.What is the process for return or replacement of STA2051?

All STA2051 units undergo pre-shipment inspection (PSI). If there is an issue with STA2051, 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 STA2051 part is unused and in its original packaging.

Return procedure for STA2051:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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