PIC16LF1765-E/ST - 8-bit XLP MCU 14KB Flash 32MHz 14-TSSOP | Microchip
MPN: PIC16LF1765-E/ST ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.89 | $1.89 |
| 10 | $1.7 | $17.00 |
| 100 | $1.42 | $142.00 |
| 500 | $1.21 | $605.00 |
| 1,000 | $1.04 | $1,040.00 |
PIC16LF1765-E/ST 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 such as ADCs, timers, communication interfaces, and configurable I/O. The PIC16LF1765-E/ST belongs to Microchip's PIC16 mid-range family, which targets cost-sensitive embedded applications that need deterministic 8-bit processing with very low active and sleep current. Within the broader taxonomy it sits at: PIC16LF1765 -> PIC16F176x family -> PIC16 mid-range -> PIC microcontroller -> MCU -> embedded processor -> semiconductor.
Key features include 12 I/O pins, a 10-bit ADC with multiple channels, two operational amplifiers, zero-cross detect, high-current I/O, a 5-bit DAC, and the eXtreme Low Power (XLP) architecture that delivers nanoWatt sleep currents. The 32MHz maximum clock speed is generated internally, eliminating the need for an external crystal in most designs. Core-independent peripherals (CIPs) such as the Complementary Waveform Generator (CWG), Numerically Controlled Oscillator (NCO), and configurable logic cells allow many functions to run without CPU intervention, reducing overall power consumption.
Architecturally, the device uses a 14-bit instruction word modified Harvard architecture, with separate program and data buses that allow instruction fetch and operand access to occur in the same cycle. This produces predictable interrupt latency and deterministic execution—properties valued in motor control, lighting, and sensor-interface firmware. The 1.8V–3.6V supply range, deep sleep current in the nano-amp range, and integrated peripherals make it a strong fit for IoT sensor nodes and remote controls.
Typical applications include LED lighting controllers, small motor-control loops, IoT sensor nodes, smart-home devices, battery-powered instrumentation, and consumer white goods. The TSSOP-14 footprint simplifies hand-prototyping and rework-friendly low-volume production. The "E" temperature grade denotes an extended industrial range of -40°C to +125°C.
A key design consideration is to leverage XLP sleep modes aggressively and assign time-critical signal generation to the CWG or NCO peripherals, keeping the CPU in sleep as long as possible. This maximizes battery life in always-on applications and is the architectural reason this part is preferred over older PIC16F1xxx devices.
Drop-in alternatives for PIC16LF1765-E/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-E/ST (same form factor and footprint) — differing in Package, Program Memory (Flash), Core Architecture, ADC, Family.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF1764-E/ST
✅ Drop-In✓ In Stock
$1.25 / Unit
View Datasheet →PIC16LF1765-I/ST
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$0.86 / Unit
View Datasheet →PIC16F1765-E/ST
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.05 / Unit
View Datasheet →PIC16LF1713-E/ST
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF1705-I/ST
✅ Drop-In✓ In Stock
$1.05 / Unit
View Datasheet →PIC16LF1554-I/ST
✅ Drop-In✓ In Stock
$0.85 / Unit
View Datasheet →PIC16LF1765-E/ST Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit, 14-bit instruction word |
| Family | PIC16F176x / PIC16LF1765 |
| Program Memory (Flash) | 14 KB (8K x 14 words) |
| Data RAM | 1 KB |
| Maximum CPU Frequency | 32 MHz |
| Supply Voltage (VDD) | 1.8 V to 3.6 V |
| Number of I/O Pins | 12 |
| ADC | 10-bit |
| DAC | 5-bit |
| Operational Amplifiers | 2 on-chip op amps |
| Operating Temperature | -40 C to +125 C (E grade) |
| Package | 14-TSSOP |
| Mounting Type | Surface Mount |
| MSL Level | 1 |
| RoHS Status | Compliant |
| Lead-Free | Yes |
PIC16LF1765-E/ST Pin Configuration
| Pin 1 | RA0/ICSPDAT — Bidirectional I/O; ICSP data |
| Pin 2 | RA1/ICSPCLK — Bidirectional I/O; ICSP clock |
| Pin 3 | RA2 — Bidirectional I/O; analog input |
| Pin 4 | RA3/MCLR/VPP — Input only; Master Clear (reset) / programming voltage |
| Pin 5 | RC0 — Bidirectional I/O |
| Pin 6 | RC1 — Bidirectional I/O |
| Pin 7 | RC2 — Bidirectional I/O |
| Pin 8 | RC3 — Bidirectional I/O |
| Pin 9 | RC4 — Bidirectional I/O |
| Pin 10 | RC5 — Bidirectional I/O |
| Pin 11 | VSS — Ground reference |
| Pin 12 | VDD — Positive supply voltage |
| Pin 13 | RA4 — Bidirectional I/O; analog input |
| Pin 14 | RA5 — Bidirectional I/O; analog input |
Typical Applications
PIC16LF1765-E/ST is suitable for 7 applications: IoT Sensor Node, LED Lighting Controller, Small Motor Control, Battery-Powered Instrumentation, Smart Home Sensor Hub, Consumer White Goods Control, Remote Control Transmitter.
IoT Sensor Node
The PIC16LF1765-E/ST is well suited to battery-powered IoT sensor nodes because of its 1.8V–3.6V supply range, XLP nanoWatt sleep current (<100 nA), and 14KB Flash for application + wireless-stack code. Placed between a 2xAA pack and a low-power radio such as the MRF24J40, it periodically wakes via the RTCC, samples a sensor through the 10-bit ADC or on-chip op amp, transmits, and returns to deep sleep. The CWG and NCO peripherals can drive a piezo buzzer or sensor excitation waveform without waking the CPU, which is the architectural reason this part extends battery life into the multi-year range.
Recommended
LED Lighting Controller
The PIC16LF1765-E/ST fits small-form-factor LED lighting controllers because its Complementary Waveform Generator (CWG) and PWM modules can produce the high-resolution dimming signals needed for constant-current LED drivers without CPU overhead. The 5-bit DAC and two on-chip op amps close the loop with a current-sense amplifier and an external MOSFET, while the zero-cross detect peripheral triggers actions on AC mains zero crossings for triac dimming. Operating from a 3.3V auxiliary rail, the part stays in the same TSSOP-14 footprint used by entry-level commercial LED bulbs and downlights.
Recommended
Small Motor Control
For brushed DC and small stepper motor control, the PIC16LF1765-E/ST provides the 32MHz core, configurable logic cells, and CWG that allow back-EMF zero-cross detection and PWM generation with minimal firmware load. The 10-bit ADC samples current through one of the integrated op amps, while the MSSP drives an external stepper or H-bridge driver such as the DRV8833. The extended -40°C to +125°C E temperature grade supports automotive under-hood and industrial cabinet environments, and the 1.8V minimum supply keeps operation stable during cranking transients when paired with a hold-up capacitor.
Recommended
Battery-Powered Instrumentation
Portable measurement instruments benefit from the PIC16LF1765-E/ST's low active current (around 30 µA/MHz at 3V), integrated op amps for signal conditioning, and 10-bit ADC for direct sensor interface. A typical handheld DMM or environmental meter uses the MCU to drive an LCD via the MSSP-connected display controller, run a sigma-delta ADC cycle using the on-chip op amp as the integrator, and log results to an external EEPROM. XLP sleep modes let the device hibernate between user-triggered measurements, extending AAA cell life into the months range.
Recommended
Smart Home Sensor Hub
Smart-home sensor hubs use the PIC16LF1765-E/ST as a low-power edge node that aggregates temperature, humidity, occupancy, and ambient-light data before forwarding to a Zigbee or Thread radio. The 14KB Flash accommodates the application logic and a small OTA bootloader, and the EUSART plus MSSP provide simultaneous connections to a host MCU and an external sensor bus. Deep-sleep current below 100 nA keeps the always-on node within the energy budget of a coin-cell or energy-harvesting supply.
Recommended
Consumer White Goods Control
White-goods control boards, including coffee machines, microwave ovens, and dishwashers, use the PIC16LF1765-E/ST for user-interface scanning, sensor acquisition, and load-driver PWM. The 12 I/O pins are sufficient to drive 7-segment displays via the CWG, read capacitive touch buttons through the integrated op amps, and toggle triac-controlled heaters via zero-cross detect. The E temperature grade supports the high-ambient thermal conditions behind appliance control panels, and the TSSOP-14 package keeps the BOM footprint smaller than equivalent 20-pin PIC16LF1769 designs.
Recommended
Remote Control Transmitter
Handheld remote controls benefit from the PIC16LF1765-E/ST's low-voltage operation, low sleep current, and integrated zero-cross detect for IR carrier generation. A typical 4-key universal remote uses the MCU to scan a keypad matrix on three or four I/O pins, encode IR commands using the CWG as the 38kHz carrier, and sleep between button presses. The 14KB Flash stores the protocol database for several consumer brands without external EEPROM, and the TSSOP-14 footprint fits inside standard AAA-battery enclosures.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF1765-E/ST — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF1764-E/ST | PIC16LF1765-I/ST | PIC16F1765-E/ST | PIC16LF1713-E/ST | PIC16LF1705-I/ST |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 14-TSSOP | 14-TSSOP - same | 14-TSSOP - same | 14-TSSOP - same | 14-TSSOP - same | 14-TSSOP - same |
| Flash Memory | 14 KB | 8 KB | 14 KB | 14 KB | 7 KB | 8 KB |
| Data RAM | 1 KB | 1 KB | 1 KB | 1 KB | 512 B | 1 KB |
| Supply Voltage | 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 | 1.8 V to 3.6 V | 1.8 V to 3.6 V |
| Maximum Clock | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| I/O Pins | 12 | 12 | 12 | 12 | 12 | 12 |
| Operating Temperature | -40 C to +125 C | -40 C to +125 C | -40 C to +85 C | -40 C to +125 C | -40 C to +125 C | -40 C to +85 C |
Key Differentiators
- Largest Flash in PIC16F176x TSSOP-14 family (vs PIC16LF1764-E/ST)
- Low-voltage LF variant vs F variant (vs PIC16F1765-E/ST)
- Extended E temperature grade (vs PIC16LF1765-I/ST)
Design Notes
Operate the PIC16LF1765-E/ST from a clean 1.8V–3.6V rail; add a 100 nF decoupling capacitor as close as possible to VDD (pin 12) and a 1 µF–10 µF bulk cap on the same trace. For battery applications use a low-Iq LDO such as MCP1755 (typical quiescent 56 µA dropped to ~1 µA in shutdown) and add a series ferrite bead to suppress battery conducted noise from corrupting the ADC reference.
Do not leave MCLR floating. Tie RA3/MCLR/VPP to VDD through a 10 kΩ pull-up, or directly to VDD if not using an external reset supervisor. A floating MCLR pin can cause random reset events under EMI, which is one of the most common PIC16LF1765-E/ST debug complaints. Always configure CONFIG1 and CONFIG2 words in code; do not rely on factory defaults because they may differ between -E and -I temperature grades.
The TSSOP-14 package has θJA around 100 °C/W, which is fine for the PIC16LF1765-E/ST's typical 30 µA/MHz active current. At full 32 MHz and 3.3V the device dissipates only a few milliwatts, so thermal management is not a concern in normal embedded use. If the application drives high-current I/O above 25 mA per pin, derate to 20 mA or distribute load across multiple I/O pins to keep the junction temperature well below 125 °C at the upper E-grade limit.
Keep the ICSP trace pair (ICSPDAT on RA0 and ICSPCLK on RA1) short and parallel to avoid coupling noise into the ADC inputs during in-circuit programming. Place the analog reference decoupling capacitor (typically 100 nF) directly at the AVREF/VDD pair and reserve a guard ring around the analog input traces. For 10-bit ADC accuracy, route the analog signal away from digital switching traces and avoid sharing GND returns with high-current loads.
Use the core-independent peripherals (CWG, NCO, configurable logic cells) for time-critical waveform generation so the CPU can stay in sleep and not contribute to switching noise. Enable the ADC in burst-averaging mode with the FRC oscillator to average out periodic noise from nearby switching regulators, and trigger the ADC from the CWG or PWM module rather than from software loops to ensure deterministic conversion timing.
Compliance Information
RoHS and REACH compliance per Microchip product page. AEC-Q100 not qualified - for automotive AEC-Q100 applications choose the automotive-grade PIC16F1765-E/ST variant or contact Microchip for the AEC-Q100 qualified part number.
