PIC16LF1704-I/SL - 8-bit 32MHz 4KB Flash MCU 14-SOIC | Microchip
MPN: PIC16LF1704-I/SL ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.55 | $1.55 |
| 10 | $1.42 | $14.20 |
| 100 | $1.21 | $121.00 |
| 500 | $1.04 | $520.00 |
| 1,000 | $0.92 | $920.00 |
PIC16LF1704-I/SL Overview
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path, a RISC CPU, on-board non-volatile program memory, working RAM, and a set of mixed-signal peripherals. Within the broader semiconductor taxonomy, an MCU belongs to: microcontroller -> embedded processor -> integrated circuit -> semiconductor. The PIC16LF1704 family integrates Intelligent Analog features such as on-chip operational amplifiers, Core Independent Peripherals (CLC, COG, Zero Cross Detect) and Peripheral Pin Select (PPS), placing it in the mid-range "advanced analog" segment of Microchip's PIC16 portfolio.
Key features include twelve I/O pins, five timers, two 10-bit PWM channels, a 10-bit ADC with up to twelve channels, two comparators and the XLP sleep current of typically under 50 nA. The 14-pin SOIC footprint (package code SL) gives a small outline through-hole-compatible surface-mount outline with 1.27 mm pin pitch, simplifying hand prototyping and breadboard-friendly adapter boards.
Architecture-wise, the device uses the enhanced mid-range PIC16 core with only 49 instructions, hardware stack and a C-compiler-optimized instruction set. The integrated nanoWatt XLP technology, peripheral module disable and idle/doze modes allow the part to maintain RTC-like operation from a coin cell for years.
Typical applications include low-power sensor nodes, consumer white goods user-interface panels, LED lighting control, battery-powered IoT endpoints, and small motor/timer controllers. The wide operating range (1.8V-3.6V) suits single-cell Li-ion or 2x AA designs. A typical design uses the on-chip op-amp to condition a sensor signal before ADC sampling, with PPS rerouting peripheral functions to any pin to simplify PCB routing. Always consult the manufacturer datasheet for ADC accuracy, op-amp offset, and absolute maximum ratings before finalizing the BOM. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for PIC16LF1704-I/SL — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PIC16LF1704-I/SL (same form factor and footprint) — differing in ADC, Package, DAC, I/O Pins, Comparators.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF1704-I/ST
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.52 / Unit
View Datasheet →PIC16LF1704-E/SL
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.82 / Unit
View Datasheet →PIC16LF1704T-I/SL
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.05 / Unit
View Datasheet →PIC16LF1704-I/P
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
PIC16F1704-I/SL
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.97 / Unit
View Datasheet →PIC16LF1704-I/SL Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC16 enhanced mid-range 8-bit RISC |
| Program Memory (Flash) | 7 KB (4K x 14 words) |
| Data SRAM | 512 bytes |
| Data EEPROM | 256 bytes |
| Maximum CPU Frequency | 32 MHz |
| Operating Voltage Range | 1.8 V to 3.6 V |
| I/O Pins | 12 |
| Timers | 5 |
| PWM Channels | 2 (10-bit) |
| ADC | 10-bit, up to 12 channels |
| Comparators | 2 |
| Operational Amplifiers | 2 on-chip |
| Core Independent Peripherals | CLC, COG, Zero-Cross Detect, PPS |
| Package | 14-SOIC (SL) 3.90 mm body |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (industrial) |
| RoHS Status | Compliant |
| MSL Level | 1 |
PIC16LF1704-I/SL Pin Configuration
| Pin 1 | RA3/AN3/Vref+ — GPIO RA3 / analog input AN3 / ADC positive reference |
| Pin 2 | RA4/AN4 — GPIO RA4 / analog input AN4 |
| Pin 3 | RA5/MCLR/Vpp — GPIO RA5 / Master Clear (reset, active-low) / ICSP programming voltage |
| Pin 4 | RA6 — GPIO RA6 |
| Pin 5 | VSS — Ground reference |
| Pin 6 | RA7/OSC1/CLKIN — GPIO RA7 / external oscillator input |
| Pin 7 | RA0/AN0/C1IN0+ — GPIO RA0 / analog input AN0 / comparator 1 non-inverting input |
| Pin 8 | RA1/AN1/C1IN0- — GPIO RA1 / analog input AN1 / comparator 1 inverting input |
| Pin 9 | RA2/AN2 — GPIO RA2 / analog input AN2 |
| Pin 10 | RC0 — GPIO RC0 |
| Pin 11 | RC1 — GPIO RC1 |
| Pin 12 | RC2 — GPIO RC2 |
| Pin 13 | RC3 — GPIO RC3 |
| Pin 14 | VDD — Positive supply voltage (1.8 V to 3.6 V) |
Typical Applications
PIC16LF1704-I/SL is suitable for 7 applications: Battery-Powered IoT Sensor Nodes, LED Lighting Control, Consumer White Goods User Interface, Small Motor / Timer Controllers, Wearable Health Monitoring, Industrial Sensor Transmitters, Remote Control / User Input HIDs.
Battery-Powered IoT Sensor Nodes
The PIC16LF1704-I/SL is well suited to coin-cell or 2x AA IoT sensor endpoints because of its 1.8-3.6 V operating range and XLP nanoWatt technology, which holds sleep current below 50 nA typical. The 32 MHz core delivers 8 MIPS, enough for periodic sensor reads over I2C/SPI plus local edge processing before transmitting. The two on-chip op-amps allow direct interfacing with bridge-type sensors (e.g., load cells, thermopiles) without external analog front-end. With 12 I/O available on the 14-SOIC, the MCU still leaves enough pins for an LED indicator and a debug ICSP header. Battery life is dominated by radio wake events; the LF1704's idle current of ~20 uA/MIPS at 1 MHz keeps average draw low. Use the CLC peripheral to wake the CPU only on a specific edge pattern, extending coin-cell life to years. Programming is supported by MPLAB X IDE and the XC8 compiler, with free optimization levels.
Recommended
LED Lighting Control
The PIC16LF1704-I/SL drives LED strips and constant-current LED arrays via its two 10-bit PWM channels and four additional PWM outputs available through the Configurable Logic Cell (CLC). At 32 MHz, PWM resolution reaches ~10 bits at 31 kHz, smooth enough for color-mixing fixtures. The Zero-Cross Detect peripheral detects AC mains zero crossings for TRIAC-dimmable retrofit lamps, eliminating the need for a dedicated zero-cross IC. Two on-chip comparators implement over-temperature and over-current LED protection by latching the PWM outputs on fault. The 14-SOIC is small enough to fit inside a GU10 bulb base. A typical design runs from 3.3 V via a non-isolated buck or capacitive dropper supply, leveraging the LF1704's 1.8 V minimum to share rails with the LED driver. Using peripheral pin select, the same firmware supports multiple PCB layouts.
Recommended
Consumer White Goods User Interface
Microchip's PIC16LF1704-I/SL fits perfectly behind the control panel of washing machines, microwave ovens and coffee makers where 12 I/O lines drive a 4x4 keypad, a 7-segment LCD via GPIO expansion, and a buzzer. The 32 MHz core decodes capacitive-touch buttons in firmware using the on-chip op-amp and CLC for noise-immune scan logic. The 10-bit ADC reads NTC temperature sensors and water-level probes without external signal conditioning. The industrial -40C to +85C rating covers appliance compartments and outdoor fascia. Two PWM channels drive a variable-speed pump or fan via a low-side MOSFET. The XLP features keep standby power below 0.1 W to meet modern energy regulations. The 14-SOIC reflow-solders onto the main PCB without wave-solder steps.
Recommended
Small Motor / Timer Controllers
The PIC16LF1704-I/SL controls small DC brush motors and stepper motors via PWM plus direction logic. The Configurable Output Generator (COG) complements the PWM by generating complementary dead-band-controlled outputs for half-bridge drivers like the MCP14E3, eliminating dead-time calculation in firmware. Five 8/16-bit timers handle quadrature decoding for a low-cost optical encoder used in BLDC commutation. The on-chip op-amps implement a current-sense amplifier for torque-limiting via a shunt resistor. With 32 MHz instruction throughput, the LF1704 maintains trapezoidal commutation at 30 krpm without CPU stall. The 14-SOIC handles 12 V gate drivers and a 5 V regulator via separate pins. Firmware updates over ICSP keep field service simple across motor variants.
Recommended
Wearable Health Monitoring
The PIC16LF1704-I/SL's 1.8 V minimum supply and 50 nA sleep current suit wrist-worn fitness bands and patch-style health monitors where a CR2032 coin cell must last 6-12 months. The 10-bit ADC samples photoplethysmography (PPG) or single-lead ECG signals at up to 100 ksamples/s, which is more than adequate for heart-rate detection. The two op-amps form an instrumentation front-end with on-chip gain of up to 32x, removing the need for a dedicated analog front-end chip. The 7 KB Flash fits algorithms like Pan-Tompkins QRS detection or simple SpO2 lookup tables. The CLC can wake the CPU only when a PPG pulse edge is detected, keeping average current below 5 uA. I2C and SPI buses connect to a Bluetooth Low Radio SoC for data uplink.
Recommended
Industrial Sensor Transmitters
The PIC16LF1704-I/SL is ideal for 4-20 mA loop-powered and 24 V industrial sensor transmitters. Its 1.8-3.6 V supply operates directly from a low-dropout post-regulator fed from the loop or 24 V rail. The two on-chip op-amps condition a strain-gauge bridge or RTD signal before the 10-bit ADC. The CLC implements proprietary protocols or HART-style FSK modulation without CPU overhead. The 5 timers generate accurate PWM for valve positioning or pulse-frequency output. Industrial -40C to +85C rating handles factory-floor environments. The 14-SOIC fits inside a standard sensor head enclosure. With 256 bytes of EEPROM, calibration coefficients are stored in-circuit without external memory. Programming over ICSP keeps field recalibration simple.
Recommended
Remote Control / User Input HIDs
The PIC16LF1704-I/SL serves as the heart of infrared remote controls, BLE-button fobs and keyboard-matrix devices. The CLC generates 38 kHz IR carrier while the timer handles protocol encoding in hardware, freeing the CPU between transmissions. Sleep current of 50 nA means a CR2032 lasts 5+ years in a typical TV remote use pattern. The 12 I/O scan a 4x5 keypad matrix without external diodes using internal weak pull-ups. The COG peripheral can generate complementary PWM for RGB-backlight LEDs. Programming is supported through MPLAB X and the PICkit 4 in-circuit debugger. The 14-SOIC reflows onto the underside of a typical remote PCB. With 7 KB Flash, the LF1704 accommodates multiple protocol stacks (RC5, NEC, SIRC) selected at runtime.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF1704-I/SL — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF1704-I/ST | PIC16LF1704-E/SL | PIC16LF1704T-I/SL | PIC16LF1704-I/P | PIC16F1704-I/SL |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 14-SOIC (SL) | 14-TSSOP (ST) | 14-SOIC (SL) - same | 14-SOIC (SL) - same | 14-PDIP (P) | 14-SOIC (SL) - same |
| Flash Memory | 7 KB (4K x 14) | 7 KB | 7 KB | 7 KB | 7 KB | 7 KB |
| SRAM | 512 bytes | 512 B | 512 B | 512 B | 512 B | 512 B |
| Operating Voltage | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 2.3 V to 5.5 V |
| Maximum Frequency | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Operating Temperature | -40C to +85C (industrial) | -40C to +85C | -40C to +125C (extended) | -40C to +85C | -40C to +85C | -40C to +85C |
| I/O Pins | 12 | 12 | 12 | 12 | 12 | 12 |
| On-Chip Op-Amps | 2 | 2 | 2 | 2 | 2 | 2 |
Key Differentiators
- On-chip dual op-amps eliminate external analog front-end (vs PIC16LF1703-I/SL)
- Core Independent Peripherals (CLC, COG, Zero-Cross) off-load CPU (vs PIC16LF1824-I/SL)
- Lower voltage range suits single-cell Li-ion/AA batteries (vs PIC16F1704-I/SL)
Design Notes
The PIC16LF1704-I/SL is rated 1.8 V to 3.6 V - never connect directly to a 5 V rail. For 5 V systems use the PIC16F1704-I/SL (2.3-5.5 V) variant which is pin-compatible. Place a 100 nF decoupling capacitor within 5 mm of the VDD pin and a bulk 10 uF tantalum or ceramic capacitor near the IC. For battery designs, the XLP sleep modes (Sleep, Idle, Doze) reduce current to 50 nA typical; use peripheral module disable to gate unused peripherals before entering Sleep.
Route the ICSP signals (ICSPCLK/ICSPDAT) to a 6-pin header on every prototype PCB even if you plan factory programming - field firmware updates are common for IoT nodes. Keep the MCLR/Vpp pin trace short (<25 mm) to avoid noise-induced resets; add a 10 kohm pull-up to VDD on MCLR if not driven externally. The 14-SOIC has 1.27 mm pitch and reflows cleanly with standard lead-free profiles (peak 245-260C).
Do not configure the on-chip op-amp output to drive a pin that is also set as a digital output - contention can damage the output stage. When using Peripheral Pin Select (PPS), remember to unlock the IOLOCK register in software after configuration or pins will appear unresponsive. The ADC reference voltage (Vref+) must be between VDD and 1.8 V minimum - using VDD as Vref is acceptable but couples supply noise into conversions. Always read the latest silicon errata (DS80000496) before finalizing firmware.
The internal 16 MHz HFINTOSC is factory-calibrated to +/-2% across voltage and temperature but is not suitable for UART baud rates above 38400 bps without software averaging. For high-speed UART, USB, or CAN, switch to the external 32 MHz crystal on OSC1/OSC2 (RA6/RA7) with 22 pF load capacitors. The 10-bit ADC achieves +/-1 LSB INL only when the source impedance is below 2 kohm - add an external buffer if driving from a higher-impedance sensor.
Compliance Information
RoHS compliant per Microchip product page. Industrial -40C to +85C temperature grade; not AEC-Q100 qualified for automotive use. Halogen-free per Microchip Material Declaration.
