PIC16LF1709-I/P - 8-bit XLP MCU, 14KB Flash, 20-PDIP | Microchip
MPN: PIC16LF1709-I/P ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.28 | $2.28 |
| 10 | $2.05 | $20.50 |
| 100 | $1.82 | $182.00 |
| 500 | $1.61 | $805.00 |
| 1,000 | $1.42 | $1,420.00 |
PIC16LF1709-I/P Overview
A PIC (Peripheral Interface Controller) microcontroller is a family of 8-bit RISC-based microcontrollers from Microchip Technology that pair a Harvard-architecture CPU with Flash program memory and on-chip peripherals. Within the broader taxonomy, a PIC sits under microcontroller -> embedded MCU -> semiconductor device. The 'LF' suffix denotes a low-voltage, low-power variant suited to battery-powered designs, while 'I/P' indicates the industrial temperature grade (-40C to +85C) and PDIP package. This combination places the PIC16LF1709-I/P at the intersection of an 8-bit MCU and an analog-rich analog-front-end (AFE) device, allowing the chip to replace multiple external analog components.
Key differentiating features are the on-chip dual op-amps (rail-to-rail input/output), the 8-bit DAC with internal reference, CLC blocks that implement combinatorial logic without CPU intervention, and PPS that remaps digital peripherals onto a wide choice of I/O pins. The integrated 10-bit ADC has up to 12 channels in the 20-pin variants, enabling direct interface to sensors without an external mux. These features let designers shrink BOM cost and PCB area in cost-sensitive analog signal-chain applications.
Architecture is an 8-bit accumulator-based Harvard design with a 14-bit instruction word, supporting 49 instructions and a hardware stack. The vectored interrupt controller handles on-chip peripherals and the interrupt-on-change feature, while the on-chip voltage regulator generates the 1.8V core supply from VDD. The device is supported by Microchip's MPLAB X IDE, XC8 C compiler, and MPLAB Code Configurator (MCC) for rapid peripheral setup.
Typical applications include LED lighting drivers (using the COG and PWM), sensor signal conditioning (op-amp + ADC), battery chargers (ZCD + ADC + DAC), consumer appliances with touch or capacitive sense (using CLC), small motor control (PWM + COG for complementary drive), and IoT edge nodes powered by coin cells where XLP sleep currents extend battery life. The 20-PDIP package targets prototype builds, hobbyist projects, and industrial control boards that need through-hole replacement or hand-soldered assembly.
When designing with this part, ensure decoupling is placed close to VDD/AVDD and that the ICSP/PGD/PGC pinout is reserved for in-circuit serial programming. Choose PIC16F1709-I/P if your supply is fixed at 2.3V-5.5V and you prefer the broader voltage range; choose PIC16LF1709-I/P for 1.8V-3.6V battery operation where XLP run/sleep currents matter.
This page synthesizes distributor pricing, drop-in alternatives, application notes, and design considerations not aggregated on a single manufacturer or distributor product page.
Drop-in alternatives for PIC16LF1709-I/P — 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 PIC16LF1709-I/P (same form factor and footprint) — differing in Package, ADC, Mounting Type, Comparators, I/O Pins.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F1709-I/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F1708-I/P
✅ Drop-In✓ In Stock
$1.18 / Unit
View Datasheet →PIC16LF1708-I/P
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.05 / Unit
View Datasheet →PIC16F1713-I/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF1713-I/P
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
PIC16F1764-I/P
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.82 / Unit
View Datasheet →PIC16F1769-I/P
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
PIC16LF1709-I/P Maximum Ratings & Electrical Characteristics
| Core | PIC16 enhanced mid-range 8-bit RISC |
| Instruction Set | 49 instructions, 14-bit word |
| Instruction Execution | 200 ns |
| Maximum Clock Frequency | 32 MHz |
| Program Memory (Flash) | 14 KB (8K x 14 words) |
| SRAM | 1024 bytes |
| EEPROM | 256 bytes |
| Operating Voltage Range | 1.8 V to 3.6 V |
| I/O Pins | 18 (20-pin PDIP) |
| ADC | 10-bit, up to 12 channels |
| DAC | 8-bit, 1 channel |
| Operational Amplifiers | 2 (on-chip) |
| Comparators | High-speed comparators |
| Timers | 8-bit and 16-bit, plus PWM/CCP/COG |
| Communication | EUSART, I2C/SPI (MSSP) |
| Special Features | CLC, COG, ZCD, PPS, XLP |
| Operating Temperature | -40C to +85C (industrial, 'I') |
| Package | 20-PDIP (0.300" / 7.62 mm) |
| Mounting Type | Through Hole |
| RoHS Status | Compliant |
PIC16LF1709-I/P Pin Configuration
| Pin 1 | RA3/AN3/VREF+/T1G — Bidirectional I/O, analog input, positive voltage reference, timer1 gate |
| Pin 2 | RA4/AN4/T1G — Bidirectional I/O, analog input, timer1 gate |
| Pin 3 | RA5/AN5 — Bidirectional I/O, analog input |
| Pin 4 | RA6/OSC2 — Bidirectional I/O, oscillator output |
| Pin 5 | RA7/OSC1/CLKIN — Bidirectional I/O, oscillator input, external clock input |
| Pin 6 | VSS — Ground reference |
| Pin 7 | RA0/AN0/ULPWU — Bidirectional I/O, analog input, ultra-low-power wake-up |
| Pin 8 | RA1/AN1/OPA1OUT — Bidirectional I/O, analog input, op-amp 1 output |
| Pin 9 | RA2/AN2/OPA1IN- — Bidirectional I/O, analog input, op-amp 1 inverting input |
| Pin 10 | RC0/SOSCO/OPA2IN+ — Bidirectional I/O, secondary oscillator, op-amp 2 non-inverting input |
| Pin 11 | RC1/SOSCI/OPA2IN- — Bidirectional I/O, secondary oscillator, op-amp 2 inverting input |
| Pin 12 | RC2/AN6/OPA2OUT — Bidirectional I/O, analog input, op-amp 2 output |
| Pin 13 | RC3/AN7 — Bidirectional I/O, analog input |
| Pin 14 | RC4/HMDMIN/SDI — Bidirectional I/O, MSSP SPI/I2C data |
| Pin 15 | RC5/HMDOUT/SCK — Bidirectional I/O, MSSP clock |
| Pin 16 | RC6/AN8/SS — Bidirectional I/O, analog input, SPI slave select |
| Pin 17 | RC7/AN9/SDO — Bidirectional I/O, analog input, MSSP data out |
| Pin 18 | VDD — Positive supply voltage (1.8V to 3.6V for LF) |
| Pin 19 | RB7/ICSPDAT/PGD — Bidirectional I/O, ICSP data |
| Pin 20 | RB6/ICSPCLK/PGC — Bidirectional I/O, ICSP clock |
Typical Applications
PIC16LF1709-I/P is suitable for 7 applications: LED Lighting Drivers with Color Mixing, Battery-Powered Sensor Conditioning, Small Appliance and Consumer Control, Industrial Sensor and Process Transmitters, Capacitive Touch and User Interface, IoT Edge Nodes and Remote Controls, Hobbyist, Education, and Prototyping.
LED Lighting Drivers with Color Mixing
The PIC16LF1709-I/P is well-suited to LED lighting and color-mixing drivers because its on-chip 8-bit DAC drives reference currents while the Complementary Output Generator (COG) and PWM modules produce dead-band-controlled complementary drive signals for high-efficiency buck or boost LED power stages. The two integrated op-amps condition current-sense signals from the LED string, and the 10-bit ADC measures both the LED voltage and thermistor for thermal foldback. With 1.8V-3.6V operation the part runs directly from a single Li-ion or 2x AA battery, and XLP sleep current below datasheet-class nanoamps preserves battery life in standby/off modes for luminaires with motion activation.
Recommended
Battery-Powered Sensor Conditioning
Battery-powered sensor designs benefit from the PIC16LF1709-I/P's two integrated rail-to-rail op-amps that amplify bridge sensors (load cells, strain gauges) or thermocouple signals directly without external instrumentation amplifiers, reducing BOM cost and PCB area. The 10-bit ADC samples up to 12 channels, enabling simultaneous reading of multiple sensors or a sensor plus supply voltage for coulomb counting. The 1.8V minimum VDD allows direct connection to depleted single-cell Li chemistries (down to ~5% state-of-charge), while XLP sleep current extends shelf life to multi-year stand-by. EUSART or I2C peripherals transmit data to a host MCU or BLE module.
Recommended
Small Appliance and Consumer Control
Small home appliances (coffee makers, blenders, fans, humidifiers) use the PIC16LF1709-I/P as a single-chip controller where the on-chip 8-bit DAC generates reference voltages for power-factor trim, the 10-bit ADC reads thermistor or potentiometer inputs, and the COG + PWM modules drive TRIACs or IGBTs for AC line control with zero-cross switching. The ZCD peripheral synchronizes switching to the AC line, eliminating inductive kickback and EMI. Peripheral Pin Select (PPS) lets the designer remap UART/I2C/SPI to any digital I/O, simplifying PCB routing in cost-sensitive consumer enclosures with tight form factors.
Recommended
Industrial Sensor and Process Transmitters
Industrial 4-20 mA loop-powered transmitters benefit from the PIC16LF1709-I/P's 1.8V minimum operation that allows the MCU to run from the same regulated rail that powers the loop, while the integrated op-amps condition the sensor signal before the 10-bit ADC digitizes it. The high-speed comparator detects loop fault conditions (open or short), and the EUSART feeds a HART or RS-485 modem for industrial networking. Industrial temperature range (-40C to +85C, 'I' grade) supports outdoor and factory-floor installations. PPS allows the digital communication pins to be reassigned if a particular pin is damaged or needs to avoid noisy analog traces.
Recommended
Capacitive Touch and User Interface
The PIC16LF1709-I/P supports capacitive touch sensing through its integrated Configurable Logic Cells (CLC) and the mTouch sensing framework, allowing designers to implement buttons, sliders, and proximity sensors without an external touch controller. The op-amps and comparators detect the small capacitance changes, while the CLC produces interrupts to wake the CPU only on a touch event, minimizing current draw. Combined with the 8-bit DAC for LED backlight dimming via PWM, the part integrates the entire user interface for white goods, IoT devices, and consumer electronics in a single 20-PDIP device.
Recommended
IoT Edge Nodes and Remote Controls
The PIC16LF1709-I/P is ideal for coin-cell-powered IoT edge nodes and remote controls because its 1.8V-3.6V range supports direct connection to a single CR2032 cell, while XLP sleep current in the datasheet's nanoamp range allows multi-year battery life when the node wakes only briefly to measure and transmit. The on-chip 10-bit ADC reads environmental sensors, the EUSART drives a sub-GHz or BLE module for wireless uplink, and PPS lets the designer remap pins to suit the RF module footprint. Industrial temperature range supports outdoor and HVAC-adjacent deployments.
Recommended
Hobbyist, Education, and Prototyping
The PIC16LF1709-I/P in 20-PDIP remains a favorite in education, hobbyist designs, and rapid prototyping because through-hole pins are easy to insert into breadboards and stripboard, and ICSP programming via PGD/PGC works with low-cost PICkit 3 / PICkit 4 / Snap debuggers. The wide 1.8V-3.6V range allows direct USB or 3.3V power rails without level shifters, and the integrated op-amps, ADC, and DAC let students explore analog signal-chain topics. Microchip's MPLAB X IDE and XC8 compiler are free, and the PIC16F1709 Curiosity development board provides an official low-cost training platform.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF1709-I/P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F1709-I/P | PIC16F1708-I/P | PIC16LF1708-I/P | PIC16F1713-I/P | PIC16LF1713-I/P |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-PDIP (0.300") | 20-PDIP - same | 20-PDIP - same | 20-PDIP - same | 20-PDIP - same | 20-PDIP - same |
| Flash Program Memory | 14 KB | 14 KB | 7 KB | 7 KB | 28 KB | 28 KB |
| SRAM | 1024 bytes | 1024 bytes | 512 bytes | 512 bytes | 2048 bytes | 2048 bytes |
| Operating Voltage | 1.8V to 3.6V | 2.3V to 5.5V | 2.3V to 5.5V | 1.8V to 3.6V | 2.3V to 5.5V | 1.8V to 3.6V |
| Maximum Clock | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| On-chip Op-Amps | 2 | 2 | 2 | 2 | 2 | 2 |
| DAC | 8-bit | 8-bit | 8-bit | 8-bit | 8-bit | 8-bit |
| EUSART + I2C/SPI | Yes | Yes | Yes | Yes | Yes | Yes |
| CLC/COG/ZCD/PPS | Yes | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Low-voltage LF variant with XLP sleep currents (vs PIC16F1709-I/P)
- 14 KB Flash - 2x the memory of the 1708 in same package (vs PIC16F1708-I/P)
- Cost-down migration path to 28 KB Flash on same footprint (vs PIC16F1713-I/P)
Design Notes
Decouple VDD with a 100 nF ceramic capacitor placed within 5 mm of the VDD pin (pin 18) and add a bulk 1 uF to 10 uF capacitor nearby. The PIC16LF1709-I/P has an internal 1.8V regulator that powers the core; this regulator is sensitive to fast VDD transients. For battery-powered designs that must wake from sleep below 1.9V, place a low-ESR ceramic (X7R/X5R) on the VDD rail. Tie unused I/O pins to either VDD or VSS through a defined level (do not leave floating) to minimize sleep current.
Route the ICSP pins (PGD = pin 19 / RB7, PGC = pin 20 / RB6) to a programming header or test pad on every PCB revision, even if final assembly does not program the chip. This ensures field-rework and recovery from a locked or corrupted Flash. Place the ICSP header near the edge of the board with series 4.7k resistors on PGD/PGC if the pins are also used for in-circuit application logic. Keep analog traces (AN0-AN9, op-amp I/O) away from PWM and PWM-complementary outputs to minimize switching noise coupling into ADC readings.
The PIC16LF1709-I/P operates only to 3.6V maximum; connecting it to a 5V rail will damage the part. If your design requires 5V tolerance, choose the PIC16F1709-I/P (2.3V-5.5V) instead. Also note that the 'I' (industrial) temperature grade is -40C to +85C, not the -40C to +125C 'E' (extended) grade. Verify your thermal environment before specifying. Finally, ensure configuration bits select the internal HFINTOSC rather than relying on an external crystal if your design needs the smallest BOM.
Compliance Information
RoHS compliant per Microchip product page; industrial temperature grade -40C to +85C. Not AEC-Q100 qualified (not automotive).
