PIC16LF1765-I/ST - 8-Bit MCU, 14KB Flash, 32MHz XLP | Microchip
MPN: PIC16LF1765-I/ST ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.05 | $2.05 |
| 10 | $1.78 | $17.80 |
| 100 | $1.42 | $142.00 |
| 500 | $1.18 | $590.00 |
| 1,000 | $0.98 | $980.00 |
| 3,000 | $0.86 | $2,580.00 |
PIC16LF1765-I/ST Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (RAM), and configurable peripherals such as ADC, timers, PWM, communication interfaces, and I/O. The PIC16 architecture sits in the 8-bit MCU hierarchy (8-bit -> RISC -> PIC16 -> enhanced mid-range -> PIC16F1xxx family), and XLP™ (eXtreme Low Power) is Microchip's branding for sub-uA/MHz active and nanoWatt sleep-mode technology. The PIC16LF1765's 10-bit ADC, op-amps, zero-cross detect, and high-current I/O make it a hybrid analog/digital controller rather than a pure logic MCU.
Key differentiating features include 32 MHz internal oscillator accuracy, four 10-bit ADC channels with computation, two operational amplifiers, a 5-/10-bit DAC, two capture/compare/PWM modules, EUSART, SPI/I²C, and zero-cross detect for AC line monitoring. The internal 32 MHz oscillator eliminates external crystals in cost-sensitive designs, while XLP™ technology delivers sleep currents below 100 nA — a key metric for battery-powered sensor nodes that must survive years on a single coin cell.
The PIC16LF1765 is built on an enhanced mid-range 14-bit instruction core with a 35 instruction set and 8-level deep hardware stack, making it code-efficient for state-machine and small-protocol applications. The wide 1.8 V – 3.6 V operating range is essential for two-alkaline-cell and single-coin-cell power domains where brown-out resilience and dynamic power scaling extend runtime significantly compared to 5 V-only MCUs.
Typical applications include low-power IoT sensor nodes, battery-powered metering, LED lighting control with zero-cross dimming, white-goods and small-appliance control, and consumer HVAC subsystems where integrated op-amps and ADCs reduce BOM. The 14-pin footprint is also ideal for space-constrained retrofits replacing legacy PIC12/PIC16 designs.
When designing with this device, reserve careful attention to the LF voltage ceiling — applying 5 V from a USB or 5 V regulator will damage the LF core; pair the LF part only with supplies ≤ 3.6 V or migrate to the PIC16F1765 (F = 1.8–5.5 V) for mixed-voltage boards.
This page synthesizes verified distributor pricing, drop-in alternatives within the PIC16 (L)F176x family, application notes, and design considerations not aggregated on any single manufacturer page.
Drop-in alternatives for PIC16LF1765-I/ST — 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 PIC16LF1765-I/ST (same form factor and footprint) — differing in ADC, MSL Level, Operating Temperature, Package, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF1765-E/ST
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF1764-I/ST
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF1768-I/ST
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
PIC16F1765-I/ST
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF1765-I/ST Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC enhanced mid-range (14-bit instruction word) |
| Family | PIC® XLP™ 16F |
| CPU Speed | 32 MHz (8 MIPS) |
| Program Memory (Flash) | 14 KB (8K × 14 words) |
| Data RAM | 1 KB |
| Data EEPROM | 128 B |
| Operating Voltage (Vdd) | 1.8 V to 3.6 V |
| Operating Temperature | -40 °C to +85 °C (industrial) |
| Package | 14-pin TSSOP (ST), 4.40 mm body width |
| Mounting Type | Surface Mount |
| ADC | 10-bit, 8 channels |
| DAC | 5-bit and 10-bit |
| Operational Amplifiers | 2 internal op-amps |
| PWM Modules | 2 (10-bit CCP) |
| Communication | EUSART, I²C/SPI, MSSP |
| Zero-Cross Detect | Yes |
| High-Current I/O | Yes (per datasheet) |
| Sleep Current (XLP™) | <100 nA typical (per XLP family spec) |
| RoHS Status | Compliant |
| MSL Level | 1 |
PIC16LF1765-I/ST Pin Configuration
| Pin 1 | RA5 — Bidirectional I/O / ICSP programming clock |
| Pin 2 | RA4 — Bidirectional I/O / ICSP programming data |
| Pin 3 | RA3 — Bidirectional I/O / MCLR (Reset, weak pull-up) |
| Pin 4 | RC5 — Bidirectional I/O / CCP1 |
| Pin 5 | RC4 — Bidirectional I/O / ZCD output |
| Pin 6 | RC3 — Bidirectional I/O / SCL (I²C) |
| Pin 7 | RC2 — Bidirectional I/O / DAC output |
| Pin 8 | RC1 — Bidirectional I/O / OPA1 output |
| Pin 9 | RC0 — Bidirectional I/O / OPA1 inverting input |
| Pin 10 | VSS — Ground reference |
| Pin 11 | VDD — Positive supply (1.8 V to 3.6 V for LF variant) |
| Pin 12 | RA2 — Bidirectional I/O / OPA2 inverting input / ADC |
| Pin 13 | RA1 — Bidirectional I/O / OPA2 output / ADC |
| Pin 14 | RA0 — Bidirectional I/O / ADC reference / ICSPDAT |
Typical Applications
PIC16LF1765-I/ST is suitable for 6 applications: Battery-Powered IoT Sensor Node, AC Zero-Cross Dimmer for LED Lighting, Smart Metering Sub-System, White Goods and Small Appliance Control, HVAC Sensor and Fan Controller, Consumer Remote Control with Touch Buttons.
Battery-Powered IoT Sensor Node
The PIC16LF1765-I/ST is well suited for battery-powered IoT sensor nodes that must operate for years on a coin cell or two-alkaline-cell battery. The 1.8 V – 3.6 V Vdd range covers a fresh alkaline pair down to brown-out, and XLP™ sleep currents below 100 nA let the device spend most of its life in deep sleep. The 32 MHz CPU wakes quickly to service a 10-bit ADC reading and transmit via EUSART or SPI, then returns to sleep. Designers typically pair the MCU with a sub-1 GHz radio or BLE module, using the internal op-amp to condition a sensor bridge before ADC sampling. Compared with a switching-regulator-fed solution, the LF core avoids switching noise that would otherwise disturb low-mV sensor signals. Total quiescent budget is dominated by the radio, not the MCU.
Recommended
AC Zero-Cross Dimmer for LED Lighting
The PIC16LF1765-I/ST's integrated zero-cross detect (ZCD) peripheral makes it a strong fit for AC-line LED dimmers and TRIAC phase-control circuits. The ZCD hardware captures the AC mains crossing event without burdening the CPU, freeing cycles for the 10-bit ADC to monitor current sense and the CCP module to generate the TRIAC firing angle. The two internal op-amps can buffer current-sense and over-voltage protection signals, reducing BOM versus an external analog front-end. Operating at 3.3 V from a small capacitive dropper or buck regulator, the LF voltage class handles a rectified 5 V rail with a single LDO. The 14 KB Flash holds lookup tables for logarithmic dim curves and IEC 61000-3-2-compliant flicker reduction.
Recommended
Smart Metering Sub-System
For electricity, gas, or water metering sub-systems, the PIC16LF1765-I/ST provides a calibrated 32 MHz internal oscillator (±1% typical), a 10-bit ADC with computation, and dual op-amps for signal conditioning. The LF voltage class supports direct connection to battery-backed metering buses, while the 128-byte EEPROM stores tamper counters and calibration constants across power-cycles. The MSSP and EUSART peripherals drive optical or wireless M-Bus modules, and the zero-cross detect enables precise power-factor measurement on the AC side. The 14-pin TSSOP footprint fits inside the cramped enclosures typical of DIN-rail meters. Total MCU-side current is dominated by periodic ADC wake-cycles; XLP™ sleep keeps idle draw negligible.
Recommended
White Goods and Small Appliance Control
The PIC16LF1765-I/ST serves as the main controller in white goods such as coffee makers, blenders, and induction cooktops where high-current I/O drives TRIACs, relays, and LED indicators. The 14 KB Flash holds state-machine firmware and user-interface logic for buttons, encoders, and seven-segment displays. The two CCP modules generate PWM for motor speed control, while the integrated op-amps condition thermistor or current-sense inputs for closed-loop regulation. The industrial -40 °C to +85 °C range handles appliance under-cabinet environments, and the TSSOP-14 footprint fits on the small PCBAs common in compact appliances. Designers benefit from a single-chip solution that replaces discrete timers and comparators.
Recommended
HVAC Sensor and Fan Controller
In HVAC subsystems — thermostats, fan controllers, and damper actuators — the PIC16LF1765-I/ST provides a tightly integrated analog front-end plus control logic in one TSSOP-14 footprint. The 10-bit ADC with computation oversamples thermistor and humidity sensor inputs, while the two internal op-amps condition NTC bridges without external components. PWM from the CCP modules drives BLDC or brushed fan motors with closed-loop RPM feedback. The 1.8 V – 3.6 V Vdd range simplifies 24 VAC half-wave rectified supplies with a single LDO, and XLP™ sleep extends battery life in wireless thermostats. The 14 KB Flash accommodates HVAC state machines, scheduling tables, and Modbus or BACnet protocol fragments.
Recommended
Consumer Remote Control with Touch Buttons
The PIC16LF1765-I/ST is a good fit for consumer remote controls that combine IR or RF transmission with capacitive touch buttons. The integrated 10-bit ADC with computation can implement mTouch™ capacitive sensing via the on-chip CVD module, eliminating external touch ICs. The 32 MHz CPU handles RC5/RC6 or NEC IR protocol encoding on the fly, while XLP™ sleep minimizes standby current when the remote is idle on the coffee table. The 1.8 V operation from a single CR2032 coin cell or two AAA batteries is well within the LF voltage class. The 14-pin TSSOP package leaves ample board area for a 20-key capacitive matrix and an IR LED driver.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF1765-I/ST — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF1765-E/ST | PIC16LF1764-I/ST | PIC16LF1768-I/ST | PIC16F1765-I/ST |
|---|---|---|---|---|---|
| Package | TSSOP-14 (ST) | TSSOP-14 (ST) - same | TSSOP-14 (ST) - same | TSSOP-14 (ST) - same | TSSOP-14 (ST) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 14 KB | 14 KB | 7 KB | 14 KB (larger RAM/EEPROM) | 14 KB |
| RAM | 1 KB | 1 KB | 512 B | 1 KB+ larger | 1 KB |
| Operating Voltage | 1.8 V – 3.6 V | 1.8 V – 3.6 V | 1.8 V – 3.6 V | 1.8 V – 3.6 V | 1.8 V – 5.5 V |
| Operating Temperature | -40 °C to +85 °C (industrial) | -40 °C to +125 °C (extended) | -40 °C to +85 °C (industrial) | -40 °C to +85 °C (industrial) | -40 °C to +85 °C (industrial) |
| CPU Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Internal Op-Amps | 2 | 2 | 2 | 2 | 2 |
| Zero-Cross Detect | Yes | Yes | Yes | Yes | Yes |
| Unit Price (qty 1, as of 2026-09-24) | $2.05 | approx $2.20 | approx $1.85 | approx $2.15 | approx $2.00 |
Key Differentiators
- True same-footprint temperature grade flexibility (vs PIC16LF1765-E/ST)
- Wide-voltage option without layout change (vs PIC16F1765-I/ST)
- Memory upgrade path within same footprint (vs PIC16LF1768-I/ST)
Design Notes
The PIC16LF1765-I/ST operates from 1.8 V to 3.6 V — applying a 5 V rail will permanently damage the LF core. For 5 V-tolerant designs, use the PIC16F1765-I/ST variant which shares the same pinout and Flash. Decoupling: place a 100 nF X7R ceramic between VDD (pin 11) and VSS (pin 10) within 3 mm of the package leads; add a 10 uF bulk capacitor on the same rail. XLP™ sleep current is below 100 nA typical, but rises if any I/O pin floats — configure unused pins as outputs low or inputs with internal pull-ups.
Layout guidelines for TSSOP-14: route the ICSP pins (RA4 = ICSPCLK, RA0 = ICSPDAT) away from high-current switching traces to avoid programming glitches. Keep the MCLR pin (RA3) trace short and add a 10 kΩ pull-up to VDD — the weak internal pull-up alone may not be sufficient in noisy environments. Place the decoupling capacitor as close as possible to pin 11 (VDD) with a wide, short VSS return path. For zero-cross detect, route the ZCD input on RC4 with minimal trace length and keep it isolated from switching nodes to prevent false triggering.
Common pitfalls: (1) Connecting a 5 V USB rail to VDD on the LF part — use the F variant or a 3.3 V LDO. (2) Failing to disable peripherals before entering sleep — the ADC, op-amps, and comparators continue to draw current if not explicitly shut down. (3) Reading an ADC channel without the recommended acquisition time — the 10-bit ADC requires at least a 1 µS Tacq for 10-bit accuracy at 32 MHz. (4) Driving the MCLR pin low without the recommended 1 µS minimum pulse width — the brown-out reset may misinterpret a short glitch. Always configure CONFIG1/2 bits in code for clock source and WDT before first instruction.
Compliance Information
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified — for automotive applications consider PIC16F1765-E/P automotive-grade variants. Halogen-free status not explicitly stated in verified web data; marked unknown.
