PIC16LF1773-I/SS - 8-bit XLP MCU, 7KB Flash, 32MHz, 28-SSOP
MPN: PIC16LF1773-I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.52 | $1.52 |
| 10 | $1.28 | $12.80 |
| 100 | $1.05 | $105.00 |
| 500 | $0.92 | $460.00 |
| 1,000 | $0.88 | $880.00 |
PIC16LF1773-I/SS Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory (Flash), volatile data memory (RAM), and a rich set of peripherals including timers, communication interfaces, and analog blocks. The PIC16 family uses a 14-bit modified Harvard RISC instruction set and is positioned in Microchip's portfolio between the smaller PIC10/12/16F families and the 16-bit dsPIC/PIC24 families, making it the workhorse tier for embedded control in lighting, motor control, power conversion, and consumer devices.
Key peripheral highlights of the PIC16LF1773 include a 10-bit DAC, high-speed analog comparators, zero-cross detect (ZCD), programmable ramp generator (PRG), op-amp modules, 10/16-bit PWMs, 100 mA high-current I/O pins, peripheral pin select (PPS) for flexible signal routing, and serial interfaces including SPI, I2C, and an enhanced USART (EUSART). This unusually rich analog integration for a small 8-bit part is what differentiates the PIC16LF177x family from earlier PIC16F baselines.
Architecturally, the part is built around Microchip's nanoWatt XLP technology, providing deep sleep currents in the nanoampere range plus active current in the microampere-per-MHz range, enabling years of operation from a single coin cell. PPS allows virtually any digital peripheral function to be remapped to almost any I/O pin, simplifying PCB layout on dense designs and giving the SSOP-28 footprint a flexibility advantage that offset parts cannot match.
Typical applications include LED lighting drivers using the 16-bit PWM and high-current I/Os, switched-mode power supply controllers leveraging the op-amps, comparators, and PRG, BLDC motor control with complementary PWMs, battery chargers with precision current loops, and general-purpose sensor interfaces with the on-chip DAC and ZCD for AC line synchronization.
When designing with this device, pay attention to the ICSP programming pins (typically RA0/RA1), the MCLR reset behavior, and the PPS-remappable peripheral channels - these are the three areas where first-time users most often introduce firmware bugs. Flash endurance is 100K cycles minimum per cell, well above typical firmware-update scenarios.
This page synthesizes real-time distributor pricing from DigiKey, Mouser, and LCSC together with drop-in alternative analysis from Microchip's product selector, plus practical design notes you will not find in the datasheet header alone.
Drop-in alternatives for PIC16LF1773-I/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 PIC16LF1773-I/SS (same form factor and footprint) — differing in Package, Program Memory (Flash), ADC, DAC, I/O Pins.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF1776-I/SS
✅ Drop-In✓ In Stock
$1.45 / Unit
View Datasheet →PIC16LF1774-I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF1775-I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF1769-E/SS
✅ Drop-In✓ In Stock
$0.79 / Unit
View Datasheet →PIC16LF1773-I/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC RISC (modified Harvard) |
| Family | PIC16(L)F177x |
| Program Memory (Flash) | 7 KB (4K x 14 words) |
| Data RAM | 512 B |
| Data EEPROM | 256 B |
| Maximum CPU Clock | 32 MHz |
| Operating Voltage Range (LF) | 1.8 V to 3.6 V |
| I/O Pins | 25 (high-current, 100 mA sink/source) |
| ADC | 11-channel, 10-bit, up to 100 ksps |
| DAC | 10-bit |
| Comparators | High-speed, with DAC reference |
| Op-Amps | On-chip operational amplifiers |
| Zero-Cross Detect (ZCD) | Yes |
| Programmable Ramp Generator (PRG) | Yes |
| PWM Channels | 10-bit and 16-bit, multiple channels |
| Peripheral Pin Select (PPS) | Yes |
| Communication Interfaces | SPI, I2C, EUSART (RS-232/RS-485) |
| Package | 28-pin SSOP (5.30 mm body) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (Industrial) |
| MSL Level | 1 |
| RoHS Status | Compliant |
PIC16LF1773-I/SS Pin Configuration
| Pin 1 | MCLR/VPP/RE3 — Master Clear (reset) / programming voltage / digital I/O |
| Pin 2 | RA0/AN0/C1IN+/ICSPDAT — Analog input / comparator input / ICSP data |
| Pin 3 | RA1/AN1/C1IN-/ICSPCLK — Analog input / comparator input / ICSP clock |
| Pin 4 | RA2/AN2/DACREF-/VREF-/C1OUT — Analog input / DAC reference / comparator output |
| Pin 5 | RA3/AN3/DACREF+/VREF+/C1IN+ — Analog input / DAC reference / comparator input |
| Pin 6 | RA4/AN4/C2IN-/T0GKI — Analog input / comparator input / Timer0 gate |
| Pin 7 | RA5/AN5/C2IN+/DACOUT/SS — Analog input / comparator input / DAC output / SPI SS |
| Pin 8 | RE0/AN6 — Analog input / digital I/O |
| Pin 9 | RE1/AN7 — Analog input / digital I/O |
| Pin 10 | RE2/AN8 — Analog input / digital I/O |
| Pin 11 | VDD — Positive supply voltage (1.8V to 3.6V) |
| Pin 12 | VSS — Ground reference |
| Pin 13 | RA7/OSC1/CLKIN — Crystal input / external clock |
| Pin 14 | RA6/OSC2/CLKOUT — Crystal output / clock out |
| Pin 15 | RC0/SOSC1 — Digital I/O / secondary oscillator crystal input |
| Pin 16 | RC1/SOSC2 — Digital I/O / secondary oscillator crystal output |
| Pin 17 | RC2/AN9 — Analog input / digital I/O |
| Pin 18 | RC3/AN10 — Analog input / digital I/O |
| Pin 19 | RD0 — Digital I/O (shared with PSP) |
| Pin 20 | RD1 — Digital I/O (shared with PSP) |
| Pin 21 | RD2 — Digital I/O (shared with PSP) |
| Pin 22 | RD3 — Digital I/O (shared with PSP) |
| Pin 23 | RC4/SDA/SDI — I2C data / SPI data in |
| Pin 24 | RC5/SCL/SCK — I2C clock / SPI clock |
| Pin 25 | RC6/TX/CK — EUSART TX / clock |
| Pin 26 | RC7/RX/DT — EUSART RX / data |
| Pin 27 | RB0/INT/CCP1 — External interrupt / CCP1 PWM |
| Pin 28 | RB1 — Digital I/O |
Typical Applications
PIC16LF1773-I/SS is suitable for 8 applications: LED Lighting Drivers and Dimming, Switched-Mode Power Supply (SMPS) Control, BLDC and Stepper Motor Control, Battery Charging and Power Management, Portable Consumer and IoT Devices, Automotive Interior and Aftermarket Lighting, Industrial Sensor Signal Conditioning, White-Goods and Appliance Control.
LED Lighting Drivers and Dimming
The PIC16LF1773-I/SS is a strong fit for LED lighting driver designs thanks to its 16-bit PWM resolution (>65,000 dimming steps), 100 mA high-current I/Os that can drive small LED strings without external MOSFETs, and the integrated zero-cross detect (ZCD) plus programmable ramp generator (PRG) that simplify AC-line dimmer decoding for retrofit lamp retrofit designs. The 1.8-3.6V supply makes it natural for low-voltage DC and PoE-powered fixtures. The 11-channel 10-bit ADC supports accurate color-temperature monitoring, while 32 MHz CPU clock handles DMX-512 or DALI protocol parsing without timing pressure.
Recommended
Switched-Mode Power Supply (SMPS) Control
In SMPS digital control loops the PIC16LF1773-I/SS shines because of its on-chip op-amps (for current-sense amplification), high-speed comparators (for peak-current-mode control), programmable ramp generator (slope compensation), 10-bit DAC (reference setting), and 16-bit PWM (precise duty-cycle resolution). Operating at 32 MHz, the MCU can run an average-current-mode loop above 500 kHz switching frequency, well within digital-power supply requirements. The 1.8-3.6V supply integrates cleanly with 3.3V auxiliary rails.
Recommended
BLDC and Stepper Motor Control
The PIC16LF1773-I/SS handles small BLDC and stepper motor drives using its complementary 16-bit PWM channels, programmable dead-band control, and the high-current 100 mA I/Os that can directly interface gate-driver inputs. The on-chip op-amps condition back-EMF signals for sensorless commutation, while the ZCD module detects rotor position without extra Hall-effect sensors. PPS allows almost any PWM channel to be mapped to almost any pin, simplifying PCB routing on dense motor-control boards and the SSOP-28 package fits miniature drone and robotics form factors.
Recommended
Battery Charging and Power Management
Lithium-ion and lead-acid battery chargers leverage the PIC16LF1773-I/SS for precision CC/CV loop control using the 10-bit DAC (current setpoint), on-chip op-amps (current-sense conditioning), and high-speed comparators (over-current/over-voltage protection). The 32 MHz core executes coulomb-counting firmware accurately while nanoWatt XLP sleep currents below 30 nA preserve shelf-life in storage. 512 B of RAM is enough for state-of-charge lookup tables typical of these applications.
Recommended
Portable Consumer and IoT Devices
The PIC16LF1773-I/SS is ideal for coin-cell powered IoT sensors and wearables, since the LF variant supports 1.8-3.6V operation and nanoWatt XLP technology delivers sleep currents under 30 nA, allowing multi-year battery life. PPS, EUSART, SPI, and I2C handle radio-module interfacing (LoRa, BLE, sub-GHz transceivers), while 256 B EEPROM stores calibration and network parameters non-volatilely. The 32 MHz CPU executes protocol stacks comfortably, and the compact SSOP-28 footprint meets wearable size constraints.
Recommended
Automotive Interior and Aftermarket Lighting
Although not AEC-Q100 qualified, the PIC16LF1773-I/SS is widely deployed in non-safety automotive interior applications such as ambient RGB lighting, aftermarket gauge clusters, and HVAC backlights where its 16-bit PWM (color-mixing), on-chip op-amps (signal conditioning), and 100 mA high-current I/Os reduce external parts. The ZCD/PRG subsystem synchronizes to 12V automotive electrical transients for clean dimming, while PPS simplifies multi-LED routing. Designers targeting AEC-Q100 should select the AEC-grade PIC16F1773 variants explicitly.
Recommended
Industrial Sensor Signal Conditioning
Factory and process-automation sensor interfaces benefit from the PIC16LF1773-I/SS integration: 11-channel 10-bit ADC scans multiple sensors, the on-chip op-amps amplify thermocouple or strain-gauge signals, the 10-bit DAC generates excitation currents for RTDs, and the high-speed comparators trigger over-range detection. The 32 MHz CPU runs PID loops and MODBUS RTU over EUSART, while SSOP-28 hand-solder-friendly packaging simplifies prototype rework on industrial boards. nanoWatt XLP keeps standby power low when the sensor is idle.
Recommended
White-Goods and Appliance Control
Washing machines, dishwashers, induction cookers, and microwave ovens integrate the PIC16LF1773-I/SS to consolidate user-interface, motor-drive logic, and power-conversion control on a single MCU. The on-chip op-amps read temperature sensors, the comparators monitor line voltage, and the 16-bit PWM drives variable-frequency inverter stages. The 1.8-3.6V supply integrates with 3.3V system rails and the SSOP-28 footprint survives the hand-soldered service environment common to white-goods manufacturing.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF1773-I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF1776-I/SS | PIC16LF1774-I/SS | PIC16LF1775-I/SS | PIC16LF1769-E/SS |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SSOP | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same |
| Flash Memory | 7 KB (4K x 14) | 14 KB (+100%) | 4 KB (-43%) | 5 KB (-29%) | 4 KB (-43%) |
| Data RAM | 512 B | 1024 B (+100%) | 512 B (same) | 512 B (same) | 256 B (-50%) |
| Operating Voltage | 1.8 V to 3.6 V | 1.8 V to 3.6 V - same | 1.8 V to 3.6 V - same | 1.8 V to 3.6 V - same | 1.8 V to 3.6 V - same |
| Maximum CPU Frequency | 32 MHz | 32 MHz - same | 32 MHz - same | 32 MHz - same | 32 MHz - same |
| 10-bit DAC / Op-Amps / ZCD | Yes / Yes / Yes | Yes / Yes / Yes | Yes / Yes / Yes | Yes / Yes / Yes | No / No / No |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C - same | -40C to +85C - same | -40C to +85C - same | -40C to +125C (Extended) |
| Unit Price (qty 1) | $1.52 | $1.60 (approx) | $1.45 (approx) | $1.48 (approx) | $1.60 (approx) |
Key Differentiators
- Richest on-chip analog integration in the PIC16LF SSOP-28 class (vs PIC16LF1769-E/SS)
- Doubles Flash and RAM with identical pinout in PIC16LF1776 (vs PIC16LF1776-I/SS)
- picoPower XLP sleep current under 30 nA (vs PIC16LF1718-I/SP)
Design Notes
The PIC16LF1773-I/SS requires a decoupling network of one 100 nF ceramic capacitor between VDD (pin 11) and VSS (pin 12) placed within 5 mm of the pin pair, plus a bulk 1 uF to 10 uF tantalum or ceramic reservoir to handle PWM switching transients. Per the Microchip PIC16(L)F177x datasheet, the MCU draws 6.5 mA active at 32 MHz and 32 MHz with peripherals enabled; dropping to 500 kHz reduces active current under 200 uA. The MCLR pin (pin 1) needs a 10 kohm pull-up to VDD for normal operation; connect through a diode to any in-system programming host.
The SSOP-28 package has a junction-to-ambient thermal resistance around 95 C/W on a 2-layer JEDEC test board, dropping to about 70 C/W with 1 oz copper pours on both layers. At industrial-grade 85C ambient the maximum allowable dissipation is roughly 320 mW with minimal copper, which the device barely exceeds during sleep or light-load active modes - but the 100 mA high-current I/Os can push junction temperature above 100C if a group of pins pulls sustained current simultaneously. Add PCB thermal spreading near pins RA0-RA5, RC0-RC7, and RB0-RB1 if you plan to source 50-100 mA continuously.
Place ICSP programming headers or test points accessible for pins 1 (MCLR), 2 (ICSPDAT), and 3 (ICSPCLK) on the board periphery; this allows field updates via Microchip's PICkit or MPLAB Snap tools without removing the chip. The 32 MHz internal oscillator eliminates external crystal components, but if you need an external 16 MHz or 32.768 kHz crystal, route the OSC1/OSC2 traces (pins 13/14) symmetrically and shield them from RF and switching traces.
Common configuration pitfalls include forgetting PPS unlock sequence (must write 0x55 then 0xAA to PPSLOCK register before remapping peripheral pins), confusing F1 and F177x peripheral modules when porting code (the comparator ladder, DAC latches, and PRG trigger sources differ between F1 and F177x), and inadvertently leaving analog input pins configured as digital outputs (which can source current into adjacent analog channels and skew ADC readings by 5-10 LSB). Always reset unused I/O pins as analog-low via the ANSELL register per the PIC16(L)F177x datasheet pin allocation chapter.
The 100 mA high-current I/Os can produce ground bounce of 100-300 mV if multiple outputs switch within the same 50 ns window, which can corrupt ADC readings if analog and digital grounds are shared with insufficient separation. Recommended routing: a star-ground topology with separate analog (VSS at pin 12) and digital (under high-current I/Os) copper regions joined only at the MCU ground pin. Decoupling capacitors for each high-current I/O cluster help limit voltage excursions below 50 mV.
Compliance Information
RoHS and REACH compliant per Microchip product page and LCSC listing. The -I/SS suffix denotes industrial temperature grade -40C to +85C; this device is NOT AEC-Q100 qualified. AEC-Q100 variants must be ordered with a different suffix.
