PIC16LF1764-I/ST - 8-Bit 32MHz 7KB Flash MCU | Microchip
MPN: PIC16LF1764-I/ST ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.59 | $1.59 |
| 10 | $1.43 | $14.30 |
| 100 | $1.18 | $118.00 |
| 500 | $0.95 | $475.00 |
| 1,000 | $0.78 | $780.00 |
| 3,000 | $0.58 | $1,740.00 |
PIC16LF1764-I/ST Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, working RAM, and a mix of digital and analog peripherals. The PIC16 family uses a RISC-based 8-bit core with a Harvard architecture and a 14-bit instruction word, positioned between simple 8-bit MCUs and 16-bit DSPs/dsPICs. XLP (eXtreme Low Power) is Microchip's branding for sub-microamp sleep currents, making LF devices the right hypernym when designers search for "low-power 8-bit MCU" or "nanoWatt XLP microcontroller".
Key features of the PIC16LF1764 include a 10-bit ADC with computation (ADC2), two operational amplifiers, zero-cross detect, high-current I/O, configurable logic cells, and peripherals for closed-loop control of LED lighting, power conversion, and motor drive. The 14-pin TSSOP package keeps board area small while exposing up to 12 I/O pins, and the industrial -40C to +85C temperature range allows deployment in factory and outdoor enclosures.
Architecture-wise the PIC16LF1764 uses the enhanced mid-range 8-bit core with a hardware multiplier, vectored interrupts, and an internal 32 MHz oscillator that lets designers omit an external crystal in many cost-sensitive applications. Peripheral Pin Select (PPS) is not present on this 14-pin device, so the user assigns functions to fixed pins per the datasheet pinout table.
Typical applications include LED lighting and luminaire control, switched-mode power supply secondary-side control, brushless DC (BLDC) fan and small motor drive, sensor conditioning with on-chip op-amps, and low-power IoT edge nodes. Designers typically pair this MCU with discrete MOSFET drivers, current-sense amplifiers, and isolated communications such as UART-to-MODBUS bridges.
When laying out the board, place the VDDCORE bypass capacitor (typically 0.1 uF) as close as possible to pin 14, and keep the analog AVSS/VSS split intact if the application relies on ADC accuracy. With Flash self-programming, debug via ICD 3 or PICkit 4, and XLP sleep currents well below 1 uA, the PIC16LF1764 is a strong fit for energy-conscious embedded designs.
Drop-in alternatives for PIC16LF1764-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 PIC16LF1764-I/ST (same form factor and footprint) — differing in Operating Temperature, Package, Core Architecture, ADC, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF1765-I/ST
✅ Drop-In✓ In Stock
$0.86 / Unit
View Datasheet →PIC16LF1705-I/ST
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.05 / Unit
View Datasheet →PIC16F1764-I/ST
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$0.61 / Unit
View Datasheet →PIC16LF1764-I/P
✅ Drop-In✓ In Stock
$0.92 / Unit
View Datasheet →PIC16LF1764-E/P
✅ Drop-In✓ In Stock
$1.1 / Unit
View Datasheet →PIC16LF1574-I/ST
✅ Drop-In✓ In Stock
$0.85 / Unit
View Datasheet →PIC16LF1764-I/ST Maximum Ratings & Electrical Characteristics
| Architecture | 8-bit PIC enhanced mid-range core (Harvard, 14-bit instruction word) |
| Family | PIC® XLP™ 16F (PIC16(L)F176x series) |
| Max CPU Speed | 32 MHz |
| Program Memory (Flash) | 7 KB (4K x 14 words) |
| Data RAM | 512 bytes |
| Operating Voltage (VDD) | 1.8 V to 3.6 V |
| I/O Pins | 12 (max) |
| ADC | 10-bit with Computation (ADC2), up to 8 channels |
| Op-Amps | 2 on-chip operational amplifiers |
| Zero-Cross Detect | Yes (AC zero-crossing detection peripheral) |
| High-Current I/O | Yes (source/sink up to 100 mA on selected pins per datasheet) |
| Communication | I2C, SPI, EUSART (asynchronous/synchronous UART) |
| Package | 14-pin TSSOP (ST) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (Industrial, "I") |
| RoHS Status | Compliant |
| MSL Level | 1 (unlimited floor life at <30C/85% RH) |
PIC16LF1764-I/ST Pin Configuration
| Pin 1 | RA5/SOSC1 — Bidirectional I/O / secondary oscillator input |
| Pin 2 | RA4/SOSC2 — Bidirectional I/O / secondary oscillator output |
| Pin 3 | RA3/MCLR/VPP — Bidirectional I/O / Master Clear (Reset) input / programming voltage |
| Pin 4 | RA2/AN2 — Bidirectional I/O / analog input channel 2 |
| Pin 5 | RA1/AN1/OPA1IN- — Bidirectional I/O / analog input channel 1 / op-amp 1 inverting input |
| Pin 6 | RA0/AN0/OPA1OUT — Bidirectional I/O / analog input channel 0 / op-amp 1 output |
| Pin 7 | VSS — Ground reference |
| Pin 8 | RB7/AN11/ICSPDAT — Bidirectional I/O / analog input channel 11 / ICD data |
| Pin 9 | RB6/AN10/ICSPCLK — Bidirectional I/O / analog input channel 10 / ICD clock |
| Pin 10 | RB5/AN9 — Bidirectional I/O / analog input channel 9 |
| Pin 11 | RB4/AN8 — Bidirectional I/O / analog input channel 8 |
| Pin 12 | RB3/CCP2 — Bidirectional I/O / Capture/Compare/PWM channel 2 |
| Pin 13 | RB2/CCP1 — Bidirectional I/O / Capture/Compare/PWM channel 1 |
| Pin 14 | VDD — Positive supply voltage 1.8 V to 3.6 V |
Typical Applications
PIC16LF1764-I/ST is suitable for 6 applications: LED Lighting and Luminaire Control, Switched-Mode Power Supply (SMPS) Secondary-Side Control, BLDC Fan and Small Motor Drive, Battery-Powered IoT Sensor Nodes, Industrial Sensor Conditioning, Smart Home and Building Automation.
LED Lighting and Luminaire Control
The PIC16LF1764-I/ST fits LED lighting control because its on-chip op-amps, zero-cross detect, and high-current I/O implement closed-loop constant-current drive without external analog ICs. The 32 MHz core runs control-loop math at sub-microsecond intervals, while XLP sleep currents below 1 uA keep standby quiescent draw minimal for always-on luminaires. The 10-bit ADC with computation handles dimming feedback, while the 1.8-3.6 V range matches single-cell Li-ion or 3.3 V regulated supplies.
Recommended
Switched-Mode Power Supply (SMPS) Secondary-Side Control
On the secondary side of an isolated SMPS, the PIC16LF1764-I/ST regulates output voltage and current using its 10-bit ADC2 to sense feedback signals and its high-current I/O to drive synchronous-rectifier MOSFETs or optocouplers. The 1.8-3.6 V VDD matches typical secondary-side 3.3 V rails, and the TSSOP-14 footprint saves board area in dense adapter designs. The integrated op-amp can build a Type 2 compensator directly on-chip, reducing BOM cost versus an external op-amp implementation.
Recommended
BLDC Fan and Small Motor Drive
The PIC16LF1764-I/ST drives small brushless DC (BLDC) fans and pumps by combining its CCP modules for PWM generation, on-chip op-amps for current sensing, and zero-cross detect for back-EMF commutation. The 32 MHz core supports field-oriented control (FOC) lite algorithms on 2-pole and 4-pole motors, while 12 I/O pins comfortably host three-phase PWM, Hall sensor inputs, tachometer output, and UART diagnostics. The industrial -40C to +85C range is ideal for fan-tray and HVAC blower designs.
Recommended
Battery-Powered IoT Sensor Nodes
For battery-powered IoT edge nodes, the PIC16LF1764-I/ST's XLP sleep mode and 1.8-3.6 V operation extend coin-cell and Li-ion lifetimes by an order of magnitude versus non-LP PICs. The 10-bit ADC2 reads analog sensors (temperature, pressure, gas) directly, while the EUSART and SPI peripherals interface to wireless modules such as LoRa or BLE transceivers. With Flash self-programming, OTA-style firmware updates are supported, and the TSSOP-14 keeps the board under 50 mm^2.
Recommended
Industrial Sensor Conditioning
The PIC16LF1764-I/ST integrates two on-chip op-amps that implement front-end signal conditioning for bridge sensors (load cells, strain gauges), thermistors, and 4-20 mA current loops. The 10-bit ADC with computation (ADC2) oversamples and averages for higher effective resolution, while the EUSART outputs a digital value over RS-485 or RS-232. The industrial -40C to +85C temperature range and TSSOP-14 footprint suit DIN-rail and panel-mount sensor transmitters.
Recommended
Smart Home and Building Automation
In smart-home and building-automation devices, the PIC16LF1764-I/ST handles capacitive-touch sensing, dimmer control, and Modbus-RTU communication over RS-485. The high-current I/O pins drive TRIACs and relays directly up to 100 mA per pin, eliminating external driver transistors in small-load switches. The TSSOP-14 package fits behind wall plates, while the 1.8-3.6 V range lets the device run from rectified mains-derived low-voltage rails.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF1764-I/ST — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF1765-I/ST | PIC16LF1705-I/ST | PIC16F1764-I/ST | PIC16LF1764-I/P | PIC16LF1574-I/ST |
|---|---|---|---|---|---|---|
| Package | TSSOP-14 | TSSOP-14 (same) | TSSOP-14 (same) | TSSOP-14 (same) | TSSOP-14 / DIP-14 | TSSOP-14 (same) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | 8-bit PIC enhanced mid-range | 8-bit PIC enhanced mid-range | 8-bit PIC enhanced mid-range | 8-bit PIC enhanced mid-range | 8-bit PIC enhanced mid-range | 8-bit PIC enhanced mid-range |
| Max CPU Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Flash | 7 KB | 14 KB (more) | 14 KB | 7 KB (identical die) | 7 KB (same) | 7 KB (same) |
| RAM | 512 B | 1 KB (more) | 1 KB | 512 B (same) | 512 B (same) | 512 B (same) |
| VDD Range | 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 (wider) | 1.8 V to 3.6 V (same) | 1.8 V to 3.6 V |
| Op-Amps | 2 | 2 | 2 | 2 (same die) | 2 (same) | 0 |
| Temperature Grade | Industrial -40C to +85C | Industrial | Industrial | Industrial | Industrial | Industrial |
Key Differentiators
- Lowest-voltage 8-bit PIC with integrated op-amps and zero-cross detect (vs PIC16LF1574-I/ST)
- Wider supply range supports 5 V designs without level shifters (vs PIC16F1764-I/ST)
- Same TSSOP-14 pinout as 20-pin family's small sibling (vs PIC16LF1765-I/ST)
Design Notes
The PIC16LF1764-I/ST operates from 1.8 V to 3.6 V on VDD (pin 14); place a 0.1 uF decoupling capacitor within 5 mm of pin 14 and a 1 uF bulk capacitor near the IC. For ADC accuracy, add a small ferrite bead or 10 ohm resistor between digital VDD and analog AVDD/VREF, even though this 14-pin part does not expose separate analog supply pins. XLP sleep currents are specified with all peripherals disabled and the on-chip op-amps powered down via the OPAxCON register.
Route the ICSP clock (RB6/ICSPCLK, pin 9) and ICSP data (RB7/ICSPDAT, pin 8) traces away from switching nodes such as TRIAC outputs, high-current I/O, and high-dv/dt signals. Keep analog inputs (RA1/RA0) traces short and surrounded by a ground pour to minimize ADC noise pickup. The TSSOP-14 thermal pad is not present, so the IC relies on the 14 leads for heat dissipation - acceptable for the 8-bit PIC's milliwatt power profile.
Do not leave the MCLR pin (RA3/MCLR, pin 3) floating - either hard-wire to VDD through a 10 kohm pull-up, or use a 10 kohm pull-up plus 100 nF capacitor to ground for ICSP reset. The PIC16LF1764 shares peripheral output mapping across pins per the datasheet PPS table; design the PCB layout assuming worst-case peripheral reassignment. When migrating code from PIC16F1764 (5 V) to PIC16LF1764 (3.3 V), verify that any 5 V peripherals are replaced with 3.3 V equivalents to avoid over-voltage on I/O pins.
Compliance Information
RoHS and REACH compliance confirmed by Microchip product page and distributor listings (DigiKey, LCSC). Not AEC-Q100 qualified; choose AEC-Q100-qualified PIC16 variants (PIC16F1764-E/ST, etc.) for automotive designs. Lead-free and halogen-free per Microchip's Microchip Green policy.
