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Microchip Technology IS1871SF-102
- Part No.:
- IS1871SF-102
- Manufacturer:
- Microchip Technology
- Category:
- RF Transceiver ICs
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
IS1871SF-102.pdf
- Description:
- IC RF TXRX+MCU BLE 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,955
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Product details
Overview
IS1871SF-102 from Microchip Technology is a Bluetooth Low Energy 5.0–compliant SoC integrating a 2.4 GHz transceiver, 8051 MCU core, 256 KB Flash, 15 GPIOs, 6-channel 12-bit ADC (ENOB=10 bits), and AES-CMAC hardware engine in a 4 mm × 4 mm 32QFN package. It operates from 1.9V to 3.6V across –20°C to +70°C and delivers –90 dBm Rx sensitivity at 0 dBm Tx output for battery-powered IoT sensor nodes.
For engineers reviewing the IS1871SF-102 datasheet, IS1871SF-102 pinout, IS1871SF-102 application, or IS1871SF-102 equivalent, this page provides verified technical context, validated pin functions, confirmed low-power operating modes, real-world use-value metrics for beacon and sensor edge applications, and two rigorously cross-checked alternative parts with documented functional and packaging differences.
Technical Context
The IS1871SF-102 implements a fully integrated BLE 5.0 radio subsystem with on-chip RF power amplifier, digital RSSI monitoring, and programmable Tx power from –25 dBm to +3 dBm. Its 8051-based MCU executes Microchip's certified BLE stack in ROM/Flash and supports host-less operation with embedded firmware.
Power management includes 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 an Always-On logic block enabling RTC wake-up and ultra-low-power shutdown mode (1.0–2.9 μA). The 12-bit SDM-ADC supports 0–3.6 V full-scale input with 10-bit ENOB across six channels, and the precision temperature sensor delivers ±3°C accuracy over –40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| BLE Compliance | Bluetooth 5.0 Low Energy core specification certified; enables interoperability with iOS/Android and supports enhanced throughput. |
| Rx Sensitivity | –90 dBm typical; ensures reliable link budget in noisy 2.4 GHz ISM band environments for wearable and proximity applications. |
| Operating Voltage | 1.9 V to 3.6 V; compatible with single-cell Li-ion, Li-poly, or coin-cell batteries without external regulators. |
| ADC Resolution | 12-bit SDM architecture with 10-bit ENOB; supports accurate battery voltage and ambient temperature monitoring in sensor nodes. |
| GPIO Count | 15 general-purpose I/O pins; sufficient for LED indicators, button inputs, and peripheral control in compact form-factor designs. |
| Package | 32-pin QFN, 4 mm × 4 mm × 0.9 mm, 0.4 mm pitch; optimized for space-constrained wearables and beacons. |
| Shutdown Current | 1.0–2.9 μA; enables multi-year battery life in intermittently active sensor deployments. |
Pinout & Package
IS1871SF-102 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 validated per Microchip DS60001371G, Figure 1-4 and Table 1-2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1_2 | I²C SCL / GPIO / ADC input | Multi-function pin supporting serial interface clock, general I/O, or analog sensing on AD10 channel. |
| P1_3 | I²C SDA / GPIO / ADC input | Multi-function pin supporting serial data line, general I/O, or analog sensing on AD11 channel. |
| HCI_TXD | UART transmit output | Asynchronous serial output for host MCU communication at up to 921.6 kbps with flow control. |
| HCI_RXD | UART receive input | Asynchronous serial input for host MCU command reception and event reporting. |
| P3_1 | SPI CSN / GPIO | Chip-select for SPI flash memory or configurable as general-purpose output. |
| P3_2 | SPI SDO / GPIO | Serial data output from SPI flash or configurable as general-purpose input. |
| P3_3 | SPI SDI / GPIO | Serial data input to SPI flash or configurable as general-purpose output. |
| P3_4 | SPI SCK / GPIO | Clock signal for SPI flash or configurable as general-purpose output. |
| P3_6 | PWM0 / RTS / GPIO | 16-bit PWM output, UART RTS flow-control, or general-purpose I/O-function selected by firmware. |
| RST_N | Active-low reset input | Asynchronous hardware reset trigger; requires clean low pulse ≥100 ns for reliable initialization. |
| P0_0 | ADC0 / CTS / GPIO | Analog input for battery voltage monitoring, UART CTS flow-control, or general-purpose I/O. |
| P0_2 | ADC2 / LED0 / GPIO | Analog input for system voltage, LED driver output, or general-purpose I/O. |
| P2_0 | Mode configuration | High = Application mode; Low = Test mode; determines boot behavior and peripheral enablement. |
| P2_7 | ADC14 / NCS2 / GPIO | Analog input for sensor voltage, second SPI chip-select, or general-purpose I/O. |
| VBAT | Main power input | Primary supply rail (1.9–3.6 V); connects to BK_IN and decoupling capacitor per layout guidelines. |
| AVDD | LDO input supply | Input to internal CLDO, PALDO, and RFLDO regulators; requires local 1 μF X5R/X7R decoupling. |
| XO_P / XO_N | 32 MHz crystal differential input | Connects to external 32 MHz fundamental-mode crystal for RF timing reference and system clock stability. |
| VCC_PA | PA power supply | 1.55 V supply for RF power amplifier; requires 0.22 μF X5R/X7R capacitor per datasheet layout rules. |
| VCC_RF | VCO/RF supply | 1.28 V supply for RF synthesizer and receiver chain; requires 1 μF X5R/X7R decoupling. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated BLE 5.0 Stack | Pre-certified software stack in ROM/Flash eliminates need for external host MCU in beacon and simple sensor applications. |
| AES-CMAC Hardware Engine | Dedicated cryptographic accelerator enables secure over-the-air firmware updates and authenticated pairing without CPU overhead. |
| Ultra-Low-Power Shutdown Mode | 1.0–2.9 μA current draw extends battery life to years in intermittent-sensing applications like asset trackers. |
| 6-Channel 12-Bit ADC | Supports simultaneous battery voltage, temperature, and external sensor monitoring with 10-bit effective resolution. |
| Flexible Multi-Function Pins | 15 GPIOs double as I²C, SPI, UART, PWM, ADC, or LED drivers-reducing BOM count and PCB layer count in compact designs. |
Applications
| Wearable Fitness Tracker | Digital Beacon Node |
|---|---|
Use Scenario: Continuous heart-rate and motion sensing with periodic BLE advertising to smartphone. IC Role / Device Role / Timing Role: Standalone BLE SoC managing sensor acquisition, local processing, and low-duty-cycle advertising intervals. Use Value: 15 GPIOs support optical sensor interface and LED feedback; 6-channel ADC monitors battery health and ambient temperature; –90 dBm sensitivity ensures robust connection indoors. | Use Scenario: Battery-powered indoor location tag broadcasting iBeacon/Eddystone frames every 200 ms. IC Role / Device Role / Timing Role: Dedicated beacon transmitter with factory-configured advertising payload and ultra-low-power sleep/wake cycles. Use Value: 1.0–2.9 μA shutdown current enables >2-year coin-cell life; integrated 32 MHz crystal interface ensures timing accuracy; AES-CMAC secures firmware updates. |
| Smart Weighing Scale | Proximity "Find Me" Tag |
Use Scenario: Load-cell measurement, display control, and BLE pairing for weight data upload to cloud service. IC Role / Device Role / Timing Role: Primary controller handling analog front-end conditioning, display driver signals, and BLE HCI communication. Use Value: 12-bit ADC with 10-bit ENOB captures precise load-cell mV outputs; 15 GPIOs drive LCD segments and buttons; 4 mm × 4 mm package fits slim scale housing. | Use Scenario: Keychain tag that triggers audible alert when phone detects its BLE signal within 1 meter. IC Role / Device Role / Timing Role: Low-latency BLE advertiser with fast wake-up from standby and responsive connection establishment. Use Value: –90 dBm Rx sensitivity enables reliable proximity detection; 0 dBm Tx output balances range and power; 16-bit PWM drives piezo buzzer directly. |
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 |
|---|---|---|---|
| IS1870SF-102 | 48-pin QFN, 6×6 mm; 31 GPIOs, 16-channel ADC, 4-channel PWM, 256 KB Flash same; higher pin count and larger footprint. | Supports more complex peripherals (e.g., dual SPI, event counters) and higher I/O density for gateway or multi-sensor hub designs. | Select IS1870SF-102 when additional GPIOs, ADC channels, or PWM outputs are required beyond IS1871SF-102's 15/6/1 allocation. |
| nRF52810-QFAA-R | 32-pin QFN, 5×5 mm; ARM Cortex-M4F core; 192 KB Flash, 24 KB RAM; –96 dBm Rx sensitivity; no integrated crystal oscillator. | Requires external 32 MHz crystal and separate DC-DC regulator; targets higher-performance BLE applications with custom protocol stacks. | Choose nRF52810-QFAA-R when migrating to ARM ecosystem, needing deeper sleep modes (<0.5 μA), or requiring custom BLE profile development. |
Compared with IS1871SF-102, IS1870SF-102 offers greater I/O and analog channel scalability in a larger package, while nRF52810-QFAA-R trades integrated PMU and crystal support for ARM flexibility and deeper sleep-making IS1871SF-102 optimal for cost-sensitive, space-constrained BLE beacons and sensors where Microchip's certified stack suffices.
Availability
IS1871SF-102 is available at Aetrix Electronics and suitable for wearable fitness trackers, digital beacon nodes, smart weighing scales, and proximity "Find Me" tags requiring stable component supply across industrial and consumer production volumes.
Supply support for IS1871SF-102 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 Inc. is a U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and connectivity solutions for embedded systems.
The IS1871SF-102 belongs to Microchip's Bluetooth Low Energy SoC product line, designed specifically for ultra-low-power, compact-form-factor IoT endpoints such as beacons, wearables, and sensor tags requiring certified BLE 5.0 operation without external host processors.
FAQ
What is the operating temperature range for the IS1871SF-102?
The IS1871SF-102 is rated for ambient operation from –20°C to +70°C, as specified in the ordering guide for part number IS1871SF-102. This range applies to the device under bias and is distinct from the broader –40°C to +85°C capability of the IS1871SF-202 variant. Thermal performance remains stable within this window for continuous BLE advertising and sensor acquisition tasks.
Does the IS1871SF-102 include an integrated crystal oscillator?
The IS1871SF-102 integrates a crystal oscillator circuit but requires an external 32 MHz fundamental-mode crystal connected to XO_P and XO_N pins. It does not contain a built-in crystal resonator. The oscillator supports tight frequency stability needed for BLE 5.0 compliance and is validated per Microchip DS60001371G Section 4.2 and Figure 1-4.
How many ADC channels does the IS1871SF-102 support, and what is their resolution?
The IS1871SF-102 supports six 12-bit sigma-delta ADC channels (AD0–AD5), with effective resolution of 10 bits (ENOB) when operating at 32 kHz sampling rate. Full-scale input range is 0 V to 3.6 V, and channels are multiplexed with GPIO functionality-enabling simultaneous battery monitoring and external sensor interfacing in compact designs using the IS1871SF-102.
Can the IS1871SF-102 operate without an external host MCU?
Yes-the IS1871SF-102 supports host-less operation via embedded firmware execution on its internal 8051 core. Microchip provides a certified BLE stack in ROM/Flash, allowing the IS1871SF-102 to function autonomously as a beacon or sensor node. Full application embedding requires firmware customization coordinated through Microchip's representative, as noted in DS60001371G Section 1.0.
What is the minimum supply current in shutdown mode for the IS1871SF-102?
The IS1871SF-102 draws 1.0 μA minimum and 2.9 μA maximum supply current in shutdown mode at +25°C, per Table 3-1 of DS60001371G. This ultra-low quiescent current enables multi-year battery life in intermittently active applications such as asset trackers and proximity tags using the IS1871SF-102.
IS1871SF-102 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:
- 13mA
- Current - Transmitting:
- 13mA
- Operating Temperature:
- -20°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 32-QFN (4x4)
IS1871SF-102 FAQ
1.How can I place an order for IS1871SF-102 through Aetrix?
Please submit a Request for Quotation (RFQ) for IS1871SF-102 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-102 reliable?
The price and inventory of IS1871SF-102 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IS1871SF-102 is usually 5 days.
3.What payment methods are accepted for IS1871SF-102?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IS1871SF-102 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IS1871SF-102?
IS1871SF-102 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IS1871SF-102 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-102?
For technical support, including IS1871SF-102 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IS1871SF-102 requirements.
6.How does Aetrix verify that IS1871SF-102 is sourced from the original manufacturer or authorized distributors?
All IS1871SF-102 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-102 meets industry standards.
7.What is the process for return or replacement of IS1871SF-102?
All IS1871SF-102 units undergo pre-shipment inspection (PSI). If there is an issue with IS1871SF-102, 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-102 part is unused and in its original packaging.
Return procedure for IS1871SF-102:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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