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Microchip Technology IS1871SF-202
- Part No.:
- IS1871SF-202
- Manufacturer:
- Microchip Technology
- Category:
- RF Transceiver ICs
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
IS1871SF-202.pdf
- Description:
- IC RF TXRX+MCU BLE 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,979
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Product details
Overview
IS1871SF-202 from Microchip Technology is a Bluetooth 5.0 Low Energy System-on-Chip (SoC) integrating a 2.4 GHz transceiver, 8051 MCU core, 256 KB Flash, 15 GPIOs, and 6-channel 12-bit ADC. It operates from 1.9V to 3.6V across –40°C to +85°C and delivers –90 dBm Rx sensitivity with 0 dBm typical Tx output for battery-powered IoT edge nodes.
For engineers reviewing the IS1871SF-202 datasheet, IS1871SF-202 pinout, IS1871SF-202 application, or IS1871SF-202 equivalent, this page provides verified technical context, package mapping, real-world use scenarios, and validated alternative options for industrial-grade BLE sensor node design.
Technical Context
The IS1871SF-202 implements a fully integrated BLE 5.0 radio stack on an 8051 core with ROM-resident protocol handling, 24 KB SRAM, and 256 KB embedded Flash for firmware upgrades. Its RF subsystem includes a 2.402–2.480 GHz transceiver with digital RSSI, programmable Tx power (–25 to +3 dBm), and hardware AES-CMAC acceleration.
Power management integrates a 1.55 V buck converter, four LDOs (1.28 V RFLDO, 1.55 V PALDO, 1.2 V CLDO, 1.2 V ULPC), and Always-On logic enabling RTC wake-up and ultra-low-power shutdown mode (1.0–2.9 μA). The 32QFN package supports external 32 MHz crystal and internal 32 kHz oscillator for timing flexibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| BLE Standard | Bluetooth 5.0 Low Energy compliant - enables interoperability with iOS/Android and supports enhanced throughput and beacon protocols. |
| Operating Voltage | 1.9 V to 3.6 V - compatible with single-cell Li-ion/Li-poly and 3.3 V system rails without level-shifting. |
| Temperature Range | –40°C to +85°C - qualified for industrial and outdoor deployment without derating. |
| Rx Sensitivity | –90 dBm typical - ensures reliable link budget in noisy environments with minimal antenna gain requirement. |
| ADC Resolution | 12-bit SDM-ADC with 6 channels - supports simultaneous battery voltage monitoring and analog sensor inputs (0–3.6 V full scale). |
| GPIO Count | 15 general-purpose I/O pins - sufficient for LED control, button interfaces, and peripheral signaling in compact wearable designs. |
| Package | 32-pin QFN, 4 mm × 4 mm × 0.9 mm, 0.4 mm pitch - enables high-density PCB layouts and automated assembly compatibility. |
| Flash Memory | 256 KB embedded Flash - accommodates full BLE stack, application firmware, and runtime data storage for over-the-air updates. |
Pinout & Package
IS1871SF-202 is housed in a 32-pin QFN package (4 mm × 4 mm × 0.9 mm, 0.4 mm pitch) with exposed thermal pad. Pin functions are defined per Microchip DS60001371G, Figure 1-4 and Table 1-2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1_2 | GPIO / ADC input / I²C SCL | Multi-function pin supporting digital I/O, analog sensing (AD10), and master clock line for I²C interface. |
| P1_3 | GPIO / ADC input / I²C SDA | Multi-function pin supporting digital I/O, analog sensing (AD11), and bidirectional data line for I²C interface. |
| HCI_TXD | UART transmit output | Asynchronous serial output for host MCU communication at up to 921.6 kbps with hardware flow control. |
| HCI_RXD | UART receive input | Asynchronous serial input for host MCU communication with CTS/RTS support for robust data transfer. |
| P3_1–P3_4 | SPI bus (NCS/MISO/MOSI/SCLK) | Configurable SPI master interface for flash memory or sensor peripherals; available via firmware update. |
| P0_0–P0_7 | GPIO / ADC inputs (AD0–AD7) | Eight dedicated analog-capable pins usable as GPIO or 12-bit ADC inputs for battery/sensor monitoring. |
| P2_7 | GPIO / ADC input (AD14) / SPI NCS2 | Secondary SPI chip select for dual-peripheral configurations; also serves as ADC channel and general I/O. |
| VBAT | Main power input | Primary supply rail (1.9–3.6 V); connects to BK_IN and decoupling capacitor per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware AES-CMAC engine | Offloads cryptographic authentication from CPU, reducing latency and power during secure pairing and data signing. |
| Ultra-low-power shutdown mode | 1.0–2.9 μA current draw enables multi-year operation on coin-cell batteries in periodic-sensing applications. |
| Integrated 32 kHz oscillator | ±250 ppm accuracy eliminates need for external RTC crystal, saving board space and BOM cost. |
| Precision temperature sensor | 12-bit resolution with ±3°C accuracy across –40°C to +85°C - suitable for ambient condition monitoring without calibration. |
| Flexible GPIO configuration | All 15 GPIOs support pull-up/pull-down selection and Hi-Z state, simplifying interface design with switches, LEDs, and sensors. |
| Real-time counter (RTC) | 24-bit low-power timer maintains timekeeping in standby mode, enabling scheduled BLE advertising or wake-up events. |
Applications
| Wearable Fitness Tracker | Digital Beacon Node |
|---|---|
|
Use Scenario: Compact wrist-worn device measuring heart rate, motion, and ambient temperature while broadcasting BLE advertisements. IC Role / Device Role / Timing Role: IS1871SF-202 acts as standalone BLE sensor hub - managing ADC sampling, PTS readings, PWM-driven LED indicators, and timed advertising packets. Use Value: 15 GPIOs and 6-channel ADC enable direct sensor interfacing; –90 dBm sensitivity ensures reliable connection within 10 m range despite body attenuation. |
Use Scenario: Small-form-factor indoor location beacon deployed in retail or logistics environments for proximity detection and asset tracking. IC Role / Device Role / Timing Role: IS1871SF-202 serves as autonomous beacon transmitter - executing preloaded iBeacon/Eddystone frames with configurable advertising interval and Tx power. Use Value: 256 KB Flash stores multiple beacon payloads; 0 dBm Tx output and low Rx sensitivity support consistent broadcast coverage in dense RF environments. |
| Industrial Sensor Node | Smart Home Appliance Controller |
|
Use Scenario: Battery-powered environmental monitor in factory settings logging temperature, humidity, and voltage levels over extended periods. IC Role / Device Role / Timing Role: IS1871SF-202 functions as edge intelligence unit - performing local ADC conversions, RTC-triggered sampling, and BLE data transmission upon threshold breach. Use Value: –40°C to +85°C rating ensures operation in unconditioned spaces; 1.0–2.9 μA shutdown current extends battery life beyond 5 years at 1-minute wake intervals. |
Use Scenario: Embedded controller inside white goods (e.g., smart refrigerator) enabling remote status reporting and firmware updates via smartphone. IC Role / Device Role / Timing Role: IS1871SF-202 operates as BLE co-processor - handling HCI UART communication with main MCU, managing GPIO-based door switch and temp sensor inputs. Use Value: UART interface with flow control prevents packet loss during high-throughput OTA updates; 12-bit ADC monitors internal power rail stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Bluetooth Low Energy SoC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| nRF52810-QCAA | ARM Cortex-M4 core, 192 KB Flash, 24 KB RAM, –96 dBm Rx sensitivity, 32-pin QFN (5×5 mm) | Higher compute performance and deeper sleep current (0.3 μA), but larger footprint and no integrated buck converter | Preferred when application requires custom RTOS or complex signal processing beyond BLE stack duties. |
| CC2640R2FZXR | ARM Cortex-M3 core, 128 KB Flash, 20 KB RAM, –97 dBm Rx sensitivity, 32-pin QFN (4×4 mm) | TI's BLE stack offers extensive profile library and cloud integration tools, but lacks hardware AES-CMAC and has higher active current | Chosen for rapid prototyping with TI's SimpleLink SDK and cloud-connected gateway deployments. |
Compared with nRF52810-QCAA and CC2640R2FZXR, IS1871SF-202 delivers tighter integration of power management (buck + LDOs), lower BOM count for battery-powered designs, and factory-qualified BLE 5.0 compliance - making it optimal for cost-sensitive, space-constrained industrial beacons and wearables where MCU offload is not required.
Availability
IS1871SF-202 is available at Aetrix Electronics and suitable for industrial sensor nodes, digital beacons, wearable fitness trackers, and smart home appliance controllers requiring stable component supply across extended product lifecycles.
Supply support for IS1871SF-202 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
Microchip Technology is a global semiconductor company specializing in microcontrollers, analog devices, and connectivity solutions for embedded systems.
The IS1871SF-202 belongs to Microchip's Bluetooth Low Energy SoC product line, engineered specifically for ultra-low-power, small-footprint IoT endpoints where seamless BLE 5.0 interoperability and integrated power management reduce system complexity.
FAQ
What is the operating temperature range for IS1871SF-202?
The IS1871SF-202 is rated for continuous operation from –40°C to +85°C, meeting industrial temperature requirements. This specification is confirmed in Table 3-1 of DS60001371G and applies to all electrical and RF performance parameters under bias, ensuring reliability in uncontrolled environments such as factory floors or outdoor installations.
Does IS1871SF-202 include an integrated DC-DC converter?
Yes, IS1871SF-202 integrates a 1.55 V buck converter (BK_IN/BK_LX/BK_O pins) alongside four LDOs. This eliminates the need for external voltage regulation in most battery-powered designs, directly supporting 1.9–3.6 V input and delivering regulated supplies for RF, core logic, and always-on circuitry as detailed in Section 2.1.1 and Figure 2-1 of the datasheet.
How many ADC channels does IS1871SF-202 support, and what is their resolution?
IS1871SF-202 provides six 12-bit sigma-delta ADC channels (AD0–AD5), configurable as analog inputs or GPIOs. Full-scale range is 0–3.6 V, with effective number of bits (ENOB) of 10 bits in 32 kHz mode. DNL and INL are specified at ±1.5 LSB and ±2 LSB respectively, per Table 3-1 in DS60001371G.
Can IS1871SF-202 operate without an external host MCU?
Yes - IS1871SF-202 supports host-less implementation where the full application firmware runs directly on its embedded 8051 core. While default factory firmware assumes host MCU control via UART, Microchip provides documentation and support to enable standalone operation with user code stored in the 256 KB Flash, as noted on page 5 and Section 2.2.3 of DS60001371G.
What is the RF output power capability of IS1871SF-202?
IS1871SF-202 delivers typical Tx output power of 0 dBm, with programmable range from –25 dBm (for proximity detection) to +3 dBm maximum. This is verified in Table 3-2 (RF Specifications) and supports robust link budgets in BLE advertising and connection modes across the 2.402–2.480 GHz ISM band.
IS1871SF-202 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- TxRx + MCU
- RF Family/Standard:
- Bluetooth
- Protocol:
- Bluetooth v5.0
- Modulation:
- -
- Frequency:
- 2.402GHz ~ 2.48GHz
- Data Rate (Max):
- 921.6kbps
- Power - Output:
- 0dBm
- Sensitivity:
- -90dBm
- Memory Size:
- 256kB Flash, 32kB ROM, 24kB SRAM
- Serial Interfaces:
- ADC, I2C, PWM, SPI, UART
- GPIO:
- 15
- Voltage - Supply:
- 1.9V ~ 3.6V
- Current - Receiving:
- 10mA
- Current - Transmitting:
- 10mA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 32-QFN (4x4)
IS1871SF-202 FAQ
1.How can I place an order for IS1871SF-202 through Aetrix?
Please submit a Request for Quotation (RFQ) for IS1871SF-202 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 IS1871SF-202 reliable?
The price and inventory of IS1871SF-202 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IS1871SF-202 is usually 5 days.
3.What payment methods are accepted for IS1871SF-202?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IS1871SF-202 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IS1871SF-202?
IS1871SF-202 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IS1871SF-202 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 IS1871SF-202?
For technical support, including IS1871SF-202 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IS1871SF-202 requirements.
6.How does Aetrix verify that IS1871SF-202 is sourced from the original manufacturer or authorized distributors?
All IS1871SF-202 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 IS1871SF-202 meets industry standards.
7.What is the process for return or replacement of IS1871SF-202?
All IS1871SF-202 units undergo pre-shipment inspection (PSI). If there is an issue with IS1871SF-202, 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 IS1871SF-202 part is unused and in its original packaging.
Return procedure for IS1871SF-202:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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