PIC16LF1709-E/SS - 8-Bit 32MHz MCU, 14KB Flash | Microchip
MPN: PIC16LF1709-E/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.55 | $25.50 |
| 100 | $2.18 | $218.00 |
| 500 | $1.92 | $960.00 |
| 1,000 | $1.71 | $1,710.00 |
PIC16LF1709-E/SS Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (RAM), and a rich set of peripherals. The PIC16LF1709 belongs to the PIC16F170x/171x family, which combines intelligent analog integration with eXtreme Low Power (XLP) technology, suiting cost-sensitive general-purpose applications. Within the broader taxonomy, an MCU sits between discrete logic and a full microprocessor (MPU); PIC MCUs in particular belong to the RISC (Reduced Instruction Set Computer) family using Harvard architecture, and Microchip's mid-range line balances performance, low power, and integrated analog peripherals.
Key differentiating features include on-chip operational amplifiers, a high-speed comparator, a 10-bit ADC, an 8-bit DAC, two CCP/PWM modules, Zero Cross Detect (ZCD), Complementary Output Generator (COG), Configurable Logic Cells (CLC), and Peripheral Pin Select (PPS). Communication peripherals include EUSART, I2C, and SPI. The XLP architecture supports nanoWatt sleep currents, making the part attractive for battery-powered and always-on designs.
From a technical perspective, the device uses a 14-bit instruction word and supports interrupt-driven operation with a hardware stack. The integrated op-amps can be configured as unity-gain buffers for sensor signal conditioning or cascaded for programmable-gain stages, while the COG module drives power switches without CPU overhead. PPS routes digital peripherals to any I/O pin, simplifying PCB layout when peripheral use changes late in the design.
Typical applications include LED lighting control, sensor conditioning front-ends, small appliance control, low-power IoT sensor nodes, automotive body and lighting modules, and battery chargers. In each of these, the combination of integrated analog, low sleep current, and PPS-driven flexibility reduces the external BOM.
Designers should size the decoupling network (typically 100 nF plus 10 uF bulk) close to VDD and AVDD pins and verify the program memory endurance (10K erase/write cycles typical) against in-field firmware update frequency. Unused op-amp and DAC outputs should be tied to a defined voltage rather than left floating.
Drop-in alternatives for PIC16LF1709-E/SS — 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-E/SS (same form factor and footprint) — differing in Package, DAC, Core Architecture, ADC, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF1709-I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F1709-E/SS
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View Datasheet →PIC16F1709-I/SS
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View Datasheet →PIC16LF1708-E/SS
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View Datasheet →PIC16LF1619-I/SS
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View Datasheet →PIC16LF1579-E/SS
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View Datasheet →PIC16LF1566-E/SS
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View Datasheet →PIC16LF1508-E/SS
✅ Drop-In✓ In Stock
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View Datasheet →PIC16LF1709-E/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC16 enhanced mid-range 8-bit RISC |
| Program Memory (Flash) | 14 KB (8K x 14 words) |
| Data RAM | 1024 bytes |
| CPU Speed | 32 MHz (8 MIPS) |
| Supply Voltage (VDD) | 1.8 V to 3.6 V |
| Operating Temperature | -40 C to +125 C (E = extended automotive grade) |
| Package | 20-pin SSOP |
| DAC | 8-bit |
| Comparators | High-speed comparator |
| CCP / PWM Modules | 2 |
| Zero Cross Detect (ZCD) | Yes |
| Complementary Output Generator (COG) | Yes |
| Configurable Logic Cells (CLC) | Yes |
| Peripheral Pin Select (PPS) | Yes |
| Communication Peripherals | EUSART, I2C, SPI |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC16LF1709-E/SS Pin Configuration
| Pin 1 | RA3/AN7/SS2 — Bidirectional I/O / ADC input / SPI slave select (PPS-mappable) |
| Pin 2 | RA4/TOCKI — Bidirectional I/O / Timer0 clock input |
| Pin 3 | RA5/MCLR/VPP — Bidirectional I/O / Master Clear (reset) / programming voltage |
| Pin 4 | RA6/CLKR — Bidirectional I/O / clock output |
| Pin 5 | RA7 — Bidirectional I/O |
| Pin 6 | RC0/SOSCO — Bidirectional I/O / secondary oscillator output |
| Pin 7 | RC1/SOSCI — Bidirectional I/O / secondary oscillator input |
| Pin 8 | RC2/CCP1 — Bidirectional I/O / Capture/Compare/PWM output 1 |
| Pin 9 | RC3 — Bidirectional I/O |
| Pin 10 | RC4/HG — Bidirectional I/O / gate driver output |
| Pin 11 | RC5 — Bidirectional I/O |
| Pin 12 | RC6 — Bidirectional I/O |
| Pin 13 | RC7 — Bidirectional I/O |
| Pin 14 | VSS — Ground reference |
| Pin 15 | VDD — Positive supply voltage |
| Pin 16 | RA0/ICSPDAT/AN0 — Bidirectional I/O / ICSP data / ADC input |
| Pin 17 | RA1/ICSPCLK/AN1 — Bidirectional I/O / ICSP clock / ADC input |
| Pin 18 | RA2/AN2 — Bidirectional I/O / ADC input |
| Pin 19 | RB4 — Bidirectional I/O |
| Pin 20 | RB5 — Bidirectional I/O |
Typical Applications
PIC16LF1709-E/SS is suitable for 6 applications: LED Lighting and Driver Control, Battery-Powered IoT Sensor Node, Automotive Body and Lighting Module, Small Appliance and White Goods Control, Industrial Sensor Transmitter and Signal Conditioner, Consumer Audio and Accessory Control.
LED Lighting and Driver Control
The PIC16LF1709-E/SS is well suited for LED lighting modules because its on-chip op-amps, high-speed comparator, and 8-bit DAC allow direct analog control of LED current without external driver ICs. The Complementary Output Generator (COG) generates complementary PWM outputs with programmable dead-band, eliminating the software overhead typically needed for half-bridge or full-bridge LED driver stages. With 32 MHz CPU performance and 14 KB Flash, designers can implement dimming curves, color-mixing math, and DALI or 0-10 V interface stacks in a single MCU. The LF (1.8 V to 3.6 V) supply range supports battery-backed emergency luminaires and DC-bus-powered fixtures.
Recommended
Battery-Powered IoT Sensor Node
The PIC16LF1709-E/SS fits battery-powered IoT sensor nodes thanks to its eXtreme Low Power (XLP) technology, which delivers nanoWatt-level sleep currents and a wide 1.8 V to 3.6 V supply range that supports direct operation from a single CR2032, two AA cells, or a Li-ion battery across its discharge curve. The integrated 10-bit ADC and on-chip op-amps condition signals from thermocouples, RTDs, and resistive bridge sensors without external analog front-end ICs, while the 14 KB Flash accommodates small LoRaWAN, Sigfox, or proprietary sub-GHz protocol stacks. EUSART, I2C, and SPI peripherals connect to radios and external sensors. Designers can keep the CPU asleep for years between measurements.
Recommended
Automotive Body and Lighting Module
The PIC16LF1709-E/SS -E suffix denotes the extended automotive temperature grade of -40 C to +125 C, qualifying the part for under-hood and body-electronics modules including interior lighting, ambient lighting, mirror control, and small motor control. The on-chip CAN-friendly peripherals (EUSART) and PWM modules drive LED strings, MOSFET half-bridges, and small DC motors, while the integrated CLC and COG blocks implement fault-detection logic without CPU intervention, meeting ASIL-leaning safety expectations. The 20-pin SSOP package and 1.8 V to 3.6 V supply align with the 12 V battery rail after a low-dropout regulator. Flash self-programming supports secure OTA updates for next-generation automotive ECUs.
Recommended
Small Appliance and White Goods Control
The PIC16LF1709-E/SS is widely used in small appliance controllers such as coffee makers, blenders, rice cookers, and air purifiers because it integrates all the analog and digital peripherals needed in a single 20-pin SSOP package. The 10-bit ADC reads temperature sensors, the 8-bit DAC sets reference points, the op-amps condition current-sense signals from motor windings, and the PWM modules drive TRIACs, MOSFETs, and IGBTs. The XLP low-power modes support battery-backed clock and timer functions. The 14 KB Flash is sufficient for user-interface logic, motor-control state machines, and basic safety diagnostics, replacing multiple discrete timer and op-amp ICs.
Recommended
Industrial Sensor Transmitter and Signal Conditioner
The PIC16LF1709-E/SS is ideal for 4-20 mA loop-powered or industrial sensor transmitters because its on-chip op-amps can be configured as instrumentation amplifiers, and the 10-bit ADC digitizes conditioned signals from thermocouples, RTDs, and strain gauges. The DAC sets the loop current, the EUSART provides HART or RS-485 communication, and the PPS module remaps peripheral outputs to any pin for flexible PCB layout. The 1.8 V to 3.6 V supply range supports both 3.3 V loop-powered and externally-powered transmitters. The -E temperature grade of -40 C to +125 C suits outdoor and process-industry enclosures.
Recommended
Consumer Audio and Accessory Control
The PIC16LF1709-E/SS integrates a useful set of peripherals for consumer audio accessories such as Bluetooth speakers, soundbars, and headphones, where it can handle button debouncing, rotary encoder inputs, battery-gauging, and LED effects. The PWM modules drive RGB indicator LEDs, the EUSART interfaces with the Bluetooth module, and the I2C/SPI peripherals connect to audio CODECs and DSP chips. The XLP nanoWatt sleep mode extends battery life between events. The 32 MHz CPU performance allows real-time volume-control smoothing, while the small 20-pin SSOP footprint keeps the PCB compact for wearable form factors.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF1709-E/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF1709-I/SS | PIC16F1709-E/SS | PIC16F1709-I/SS | PIC16LF1708-E/SS | PIC16LF1619-I/SS | PIC16LF1579-E/SS | PIC16LF1566-E/SS | PIC16LF1508-E/SS |
|---|---|---|---|---|---|---|---|---|---|
| Package | 20-pin SSOP | 20-pin SSOP (same) | 20-pin SSOP (same) | 20-pin SSOP (same) | 20-pin SSOP (same) | 20-pin SSOP (same) | 20-pin SSOP (same) | 20-pin SSOP (same) | 20-pin SSOP (same) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| CPU Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Supply Voltage | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 5.5 V | 1.8 V to 5.5 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 | 1.8 V to 3.6 V |
| Operating Temperature | -40 C to +125 C (E grade) | -40 C to +85 C (I grade) | -40 C to +125 C (E grade) | -40 C to +85 C (I grade) | -40 C to +125 C (E grade) | -40 C to +85 C (I grade) | -40 C to +125 C (E grade) | -40 C to +125 C (E grade) | -40 C to +125 C (E grade) |
| ADC Resolution | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit |
Key Differentiators
- Integrated op-amps, DAC, COG, and CLC in a 20-pin SSOP at 32 MHz (vs PIC16LF1508-E/SS)
- 1.8 V to 3.6 V low-voltage operation with XLP nanoWatt sleep (vs PIC16F1709-I/SS)
- Extended automotive temperature grade (-40 C to +125 C) (vs PIC16LF1709-I/SS)
Design Notes
Place a 100 nF X7R decoupling capacitor within 3 mm of the VDD pin and a 10 uF bulk capacitor on the same supply trace. For battery-powered designs using the LF part's 1.8 V floor, add a ferrite bead or 10 ohm resistor between the battery and VDD to suppress inrush currents during MCU wake-up. The XLP Sleep mode draws sub-microamp currents but requires the internal voltage regulator to be in a stable state before WDT or interrupt wake-up, so add 10 ms settling time in software.
Do not leave unused op-amp and DAC outputs floating - tie them to a defined voltage (typically VSS) to prevent supply-current drift. The MCLR/VPP pin must be tied to VDD through a 10 kohm resistor for normal operation; without it, the part will not exit Reset. ICSP programming requires the ICSPCLK and ICSPDAT pins to be accessible; reserve these on the PCB and never tie them directly to VDD or VSS in production boards.
Route the 32 MHz system clock trace as short as possible and keep it away from analog inputs and the high-current switching traces driven by COG or PWM outputs. The on-chip op-amp inputs are high-impedance and benefit from a guard ring tied to a quiet ground on the PCB top layer. For SSOP-20 packages, use 0.4 mm pitch routing with at least 0.2 mm clearance to neighboring signals to keep assembly yield high.
When using PPS to remap EUSART, SPI, or I2C pins, verify that the new pin mapping supports the peripheral's open-drain or push-pull drive mode in the datasheet pin description. PPS does not change the electrical characteristics of the pin, only the logical mapping. For I2C buses above 400 kHz, add 4.7 kohm pull-up resistors and consider a 100 ohm series resistor on SDA/SCL to dampen ringing.
Estimated: at 32 MHz and 3.6 V, the PIC16LF1709-E/SS core current is approximately 5 mA active and sub-1 uA in Sleep. The SSOP-20 package has a theta_JA of approximately 100 C/W (typical 4-layer JEDEC test board). In a sealed enclosure at +60 C ambient, the junction will rise a few degrees above ambient at full active load - well within the +125 C operating limit. For enclosed designs above +85 C, validate with a thermocouple on the package body.
Compliance Information
RoHS and REACH compliant per Microchip product page. AEC-Q100 qualification status not explicitly stated for this -E grade part - consult Microchip automotive-grade documentation for specific qualification reports. The -E temperature grade (-40 to +125 C) is suitable for many automotive applications but does not by itself imply AEC-Q100 certification.
