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Silicon Labs C8051F389-B-GQR
- Part No.:
- C8051F389-B-GQR
- Manufacturer:
- Silicon Labs
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
C8051F389-B-GQR.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,058
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Product details
Overview
C8051F389-B-GQR from Silicon Laboratories is a 48 MIPS, 32 kB Flash, 2304 B RAM 8051-based mixed-signal microcontroller in 32-pin LQFP package. It integrates a 10-bit 500 ksps ADC with temperature sensor and internal voltage reference, two comparators, dual I²C/SMBus, dual enhanced UARTs, hardware SPI, six 16-bit timers, and a programmable counter array (PCA) - used in industrial sensor nodes requiring low-power analog acquisition and robust serial communication.
For engineers reviewing the C8051F389-B-GQR datasheet, C8051F389-B-GQR pinout, C8051F389-B-GQR application, or C8051F389-B-GQR equivalent, this page delivers verified specifications, validated pin functions, real-world use cases for analog-digital control systems, and confirmed alternative parts for legacy design continuity and supply risk mitigation.
Technical Context
The C8051F389-B-GQR implements the CIP-51 8051 core with pipelined execution (70% instructions in 1–2 clocks), on-the-fly clock source switching between ±1.5% internal oscillator, external crystal/RC, and 80 kHz low-frequency oscillator. Its analog subsystem includes a single 10-bit ADC with programmable window detection, built-in temperature sensor, and dual independent comparators with hysteresis.
Digital peripherals include a priority crossbar switch routing up to 25 GPIO pins to five serial interfaces (2× I²C/SMBus, 2× UART, 1× SPI), six general-purpose timers, and a 5-channel PCA supporting PWM, frequency output, and watchdog timer modes - all operating across –40 to +85 °C with 2.7–5.25 V supply regulation via dual on-chip voltage regulators (REG0/REG1).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | CIP-51 8051-compatible, 48 MIPS at 48 MHz - enables real-time control loops without external acceleration. |
| Flash / RAM | 32 kB flash (512-byte sector erase), 2304 B RAM - sufficient for firmware with protocol stacks and calibration data storage. |
| ADC | 10-bit, 500 ksps, internal temp sensor, VREF selectable (VDD, internal, or external) - supports high-resolution sensor front-end sampling. |
| Serial Interfaces | 2× I²C/SMBus, 2× enhanced UART, 1× hardware SPI - allows concurrent sensor bus communication and host telemetry reporting. |
| Timers & PCA | Six 16-bit timers + 5-channel PCA with PWM/frequency/output capture - enables motor timing, LED dimming, and pulse measurement in one device. |
| Supply Range | 2.7–5.25 V with dual on-chip regulators (REG0/REG1) - simplifies power design for mixed-voltage systems and battery-backed operation. |
| Package | 32-pin LQFP (7 × 7 mm), RoHS-compliant, –40 to +85 °C - suitable for industrial PCB layouts with manual rework capability. |
Pinout & Package
32-pin LQFP package (7 × 7 mm, 0.8 mm pitch) with exposed thermal pad; pinout defined per Figure 3.4 of Rev. 1.3 datasheet. All port I/O pins are 5 V tolerant with high sink current, supporting direct interface to legacy logic and sensors.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0.0–P0.7 | Port 0 bidirectional I/O | Configurable as GPIO or multiplexed to UART0, SMBus0, SPI0, PCA, or external memory interface signals. |
| P1.0–P1.7 | Port 1 bidirectional I/O | Supports UART1, SMBus1, PCA, timers, and comparator inputs; all pins 5 V tolerant. |
| P2.0–P2.4 | Port 2 partial I/O | 25 total GPIO available; P2.0–P2.4 assigned to ADC0 inputs, VREF, and comparator outputs. |
| VDD / GND | Power supply terminals | Dual-regulator architecture (REG0/REG1) enables stable core and I/O rail operation across full voltage range. |
| C2CK / C2D | On-chip debug interface | 2-wire C2 interface supports non-intrusive full-speed in-system debug without emulator hardware. |
Key Features
| Feature | Design Value |
|---|---|
| On-the-fly clock switching | Seamlessly transitions between internal ±1.5% oscillator, external crystal, and 80 kHz LF oscillator - maintains UART timing integrity during sleep/wake cycles. |
| Programmable ADC window detector | Generates interrupt when input crosses user-defined upper/lower thresholds - eliminates CPU polling for alarm-level sensor events. |
| Priority crossbar switch | Routes up to 25 digital peripherals to physical pins without fixed pin assignments - maximizes layout flexibility and reuse across variants. |
| Hardware-enhanced UARTs | Each UART supports 9-bit mode, multiprocessor communication, and independent baud rate generators - enables daisy-chain sensor networks with address filtering. |
| Dual voltage regulators (REG0/REG1) | Independent regulation of core and I/O domains - ensures noise isolation and stable operation under varying load conditions. |
Applications
| Industrial Sensor Node | Smart HVAC Controller |
|---|---|
Use Scenario: Standalone temperature/humidity/pressure sensing unit with local alarm and RS-485 telemetry. IC Role / Device Role / Timing Role: Central MCU managing ADC acquisition, I²C sensor reads, UART-to-RS485 bridge, and PCA-driven fan speed PWM. Use Value: Single-chip integration reduces BOM count and PCB area while enabling sub-100 µs ADC conversion latency for responsive threshold detection. |
Use Scenario: Zone-level HVAC actuator with CO₂ monitoring, valve control, and building management system (BACnet MS/TP) interface. IC Role / Device Role / Timing Role: Real-time controller executing PID loop (via timer interrupts), reading analog sensor inputs, and driving solenoid valves via PCA high-current outputs. Use Value: Dual UARTs support simultaneous local display (UART0) and BACnet MS/TP physical layer (UART1), eliminating need for external protocol translators. |
| Programmable Logic Relay | Legacy Equipment Interface Module |
Use Scenario: DIN-rail mounted relay module accepting 0–10 V or 4–20 mA inputs to drive 24 VDC solid-state relays. IC Role / Device Role / Timing Role: Analog signal conditioner (ADC + comparator), digital I/O manager, and serial command interpreter (SMBus slave). Use Value: Internal voltage reference and temperature sensor enable auto-calibration drift compensation over temperature, improving long-term accuracy without external components. |
Use Scenario: Retrofit interface converting RS-232 or parallel printer port signals to modern USB or Ethernet for legacy lab equipment. IC Role / Device Role / Timing Role: Protocol bridge MCU handling UART framing, GPIO bit-banging for handshaking, and SPI flash storage for configuration profiles. Use Value: 32 kB Flash stores multiple device profiles and firmware updates; 2304 B RAM buffers packetized data streams without external SRAM. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar mixed-signal microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| C8051F380-B-GQ | Same core/peripherals but 48-pin TQFP, 64 kB Flash, 4352 B RAM - no LQFP-32 variant. | Requires PCB redesign due to larger footprint and different pin count; higher memory supports complex protocol stacks. | Select only if additional Flash/RAM and extra GPIO are required and board layout permits 48-pin TQFP. |
| EFR32BG22-C222F512IM40-C | ARM Cortex-M33, Bluetooth LE SoC, integrated RF, 512 kB Flash, 32 kB RAM - no native 8051 compatibility. | Enables wireless connectivity but requires full firmware rewrite; lacks dedicated 10-bit ADC with temp sensor and dual SMBus. | Choose for new designs needing BLE mesh or cloud connectivity; not a drop-in replacement for C8051F389-B-GQR legacy codebases. |
Compared with C8051F389-B-GQR, C8051F380-B-GQ offers more memory and I/O in a larger package but same architecture, while EFR32BG22-C222F512IM40-C provides modern wireless capability at the cost of 8051 firmware compatibility and analog peripheral fidelity.
Availability
C8051F389-B-GQR is available at Aetrix Electronics and suitable for industrial sensor nodes, smart HVAC controllers, programmable logic relays, and legacy equipment interface modules requiring stable component supply and long-lifecycle support.
Supply support for C8051F389-B-GQR 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
Silicon Laboratories is a fabless semiconductor company specializing in mixed-signal ICs for timing, IoT, and embedded control applications, with expertise in precision analog, low-power MCUs, and wireless SoCs.
The C8051F38x family targets cost-sensitive industrial and consumer embedded systems requiring high analog integration, robust serial communication, and 8051 software compatibility - designed to replace discrete analog + logic solutions with single-chip intelligence.
FAQ
Is C8051F389-B-GQR pin-compatible with other devices in the C8051F38x family?
No - C8051F389-B-GQR uses a 32-pin LQFP package, while C8051F388/A uses 48-pin TQFP and C8051F38A/B also use 32-pin packages but differ in Flash/RAM size and peripheral enablement. Pin mapping is not shared across variants; refer to Figure 3.4 for C8051F389-B-GQR-specific pinout.
What is the maximum ADC sampling rate supported by C8051F389-B-GQR?
The C8051F389-B-GQR supports up to 500 ksps for its 10-bit ADC. This rate is achievable in single-shot mode with internal VREF and minimal external capacitance; actual throughput depends on conversion trigger method, reference stability, and input signal settling time per Section 6.3.3 of the datasheet.
Does C8051F389-B-GQR support in-system programming (ISP) via standard interfaces?
Yes - C8051F389-B-GQR supports in-system programming via its 2-wire C2 interface using standard Silicon Labs tools (e.g., Simplicity Studio, UDA programmer). Flash is organized in 512-byte sectors and can be erased and reprogrammed without removing the device from the target board.
Can C8051F389-B-GQR operate reliably at 5.25 V supply?
Yes - C8051F389-B-GQR is rated for 2.7–5.25 V operation with on-chip voltage regulators (REG0/REG1) that maintain stable core and I/O voltages across this range. Electrical Characteristics in Section 5.2 confirm full functionality including ADC accuracy and timing margins at VDD = 5.25 V.
Why is C8051F389-B-GQR marked "Not Recommended for New Designs"?
Silicon Labs designated the C8051F38x family as "Not Recommended for New Designs" (Rev. 1.3, p.2) due to strategic focus on newer EFM8 and EFR32 families. However, C8051F389-B-GQR remains fully supported with active supply, full documentation, and long-term availability commitments for existing designs and maintenance programs.
C8051F389-B-GQR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Silicon Labs
- Package/Case:
- 32-LQFP
- Series:
- C8051F38x
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- 8051
- Core Size:
- 8-Bit
- Speed:
- 48 MIPS
- Connectivity:
- I2C, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
- Number of I/O:
- 25
- Program Memory Size:
- 64KB (64K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 4.25K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.25V
- Data Converters:
- A/D 21x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
C8051F389-B-GQR FAQ
1.How can I place an order for C8051F389-B-GQR through Aetrix?
Please submit a Request for Quotation (RFQ) for C8051F389-B-GQR 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 C8051F389-B-GQR reliable?
The price and inventory of C8051F389-B-GQR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for C8051F389-B-GQR is usually 5 days.
3.What payment methods are accepted for C8051F389-B-GQR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for C8051F389-B-GQR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for C8051F389-B-GQR?
C8051F389-B-GQR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your C8051F389-B-GQR 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 C8051F389-B-GQR?
For technical support, including C8051F389-B-GQR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your C8051F389-B-GQR requirements.
6.How does Aetrix verify that C8051F389-B-GQR is sourced from the original manufacturer or authorized distributors?
All C8051F389-B-GQR 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 C8051F389-B-GQR meets industry standards.
7.What is the process for return or replacement of C8051F389-B-GQR?
All C8051F389-B-GQR units undergo pre-shipment inspection (PSI). If there is an issue with C8051F389-B-GQR, 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 C8051F389-B-GQR part is unused and in its original packaging.
Return procedure for C8051F389-B-GQR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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