PIC16LC773T-I/SO - 8-Bit 20MHz 7KB OTP MCU SOIC-28 | Microchip
MPN: PIC16LC773T-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.9 | $8.90 |
| 10 | $8.01 | $80.10 |
| 100 | $7.12 | $712.00 |
| 500 | $6.41 | $3,205.00 |
| 1,000 | $5.69 | $5,690.00 |
PIC16LC773T-I/SO Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, data RAM, and programmable peripherals. The PIC16 family uses a Harvard RISC architecture with a 14-bit wide instruction word, which simplifies decoder logic and yields deterministic, easily calculated instruction cycles. LC-prefixed PIC16 parts are optimized for low-voltage operation (2.5V-5.5V), making them suitable for battery-powered and energy-conscious designs where full-spec PIC16C devices cannot meet the minimum VDD.
Key features of the PIC16LC773T-I/SO include 22 digital I/O pins spread across multiple ports, integrated 12-bit ADC (up to 6 channels on this family), hardware USART, MSSP (SPI/I2C), and three timers. The OTP program memory cannot be electrically erased but can be window-erasable on certain package variants, and it supports in-circuit serial programming (ICSP) via two pins. Internal brown-out reset and power-on reset simplify firmware bring-up.
The architecture uses a 14-bit instruction set with an 8-level hardware stack and interrupts; most instructions execute in a single cycle (4 oscillator clocks). With a 20MHz oscillator the instruction cycle is 200ns, sufficient for typical control loops, slow communication protocols, and human-interface firmware. Compared with flash-based PIC16F cousins, the OTP LC variant reduces unit cost at moderate volumes but loses field reprogrammability.
Typical applications include appliance control panels, low-cost sensor interfaces, simple motor-driver controllers, industrial front-end modules, and consumer white-goods. Designers choose the LC family when the firmware is stable, volumes are moderate-to-high, and supply-voltage headroom is constrained.
When designing with this device, plan the OTP programming step into manufacturing because once the bit cells are written they cannot be electrically erased. Always reserve the ICSP pins (typically RB6/RB7) on the PCB so firmware can be programmed after board assembly.
Drop-in alternatives for PIC16LC773T-I/SO — 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 PIC16LC773T-I/SO (same form factor and footprint) — differing in ADC, Core Architecture, Package, RoHS Status, Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LC773T-I/SO
✅ Drop-In✓ In Stock
$5.69 / Unit
View Datasheet →PIC16LC773-I/SO
✅ Drop-In✓ In Stock
$5.95 / Unit
View Datasheet →PIC16LC773T/SO
✅ Drop-In✓ In Stock
$3.85 / Unit
View Datasheet →PIC16F877A-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LC771T-I/SO
✅ Drop-In✓ In Stock
$4.3 / Unit
View Datasheet →PIC16LC773T-I/SO Maximum Ratings & Electrical Characteristics
| Product Type | 8-bit Microcontroller (MCU) |
| Core Architecture | PIC RISC (Harvard, 14-bit instructions) |
| Family | PIC16C / PIC16LC |
| Program Memory Size | 7KB (4K x 14) OTP |
| RAM Size | 256 bytes |
| Maximum CPU Frequency | 20 MHz |
| Supply Voltage (VDD) | 2.5V to 5.5V (LC variant) |
| I/O Pins | 22 |
| Package | 28-pin SOIC (SOIC-28, 7.50 mm width) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C (Industrial, 'I' suffix) |
| ADC | 12-bit (per family datasheet) |
| Timers | 3 (Timer0, Timer1, Timer2) |
| Communication | USART (SCI), MSSP (SPI / I2C) |
| ICSP (In-Circuit Serial Programming) | Yes |
| Program Memory Type | OTP (One-Time-Programmable) |
| Packaging Form | Tape and Reel ('T' suffix) |
| RoHS Status | Compliant |
PIC16LC773T-I/SO Pin Configuration
| Pin 1 | RA2/AN2/VREF- — Port A bit 2 / Analog input 2 / ADC VREF- |
| Pin 2 | RA3/AN3/VREF+ — Port A bit 3 / Analog input 3 / ADC VREF+ |
| Pin 3 | RA4/T0CKI — Port A bit 4 / Timer0 clock input |
| Pin 4 | RA5/AN4/SS — Port A bit 5 / Analog input 4 / SPI slave select |
| Pin 5 | RE0/AN5/RD — Port E bit 0 / Analog input 5 / Parallel read |
| Pin 6 | RE1/AN6/WR — Port E bit 1 / Analog input 6 / Parallel write |
| Pin 7 | RE2/AN7/CS — Port E bit 2 / Analog input 7 / Parallel chip select |
| Pin 8 | VDD — Positive supply voltage (2.5V-5.5V) |
| Pin 9 | OSC2/CLKOUT — Oscillator output / Clock out |
| Pin 10 | OSC1/CLKIN — Oscillator input / External clock in |
| Pin 11 | RC0/T1OSO/T1CKI — Port C bit 0 / Timer1 oscillator output / Timer1 clock in |
| Pin 12 | RC1/T1OSI/CCP2 — Port C bit 1 / Timer1 oscillator input / CCP2 output |
| Pin 13 | RC2/CCP1 — Port C bit 2 / CCP1 PWM output |
| Pin 14 | RC3/SCK/SCL — Port C bit 3 / SPI clock / I2C clock |
| Pin 15 | RC4/SDI/SDA — Port C bit 4 / SPI data in / I2C data |
| Pin 16 | RC5/SDO — Port C bit 5 / SPI data out |
| Pin 17 | RC6/TX/CK — Port C bit 6 / USART TX / USART synchronous clock |
| Pin 18 | RC7/RX/DT — Port C bit 7 / USART RX / USART synchronous data |
| Pin 19 | VSS — Ground reference |
| Pin 20 | RD0/PSP0 — Port D bit 0 / Parallel slave port bit 0 |
| Pin 21 | RD1/PSP1 — Port D bit 1 / Parallel slave port bit 1 |
| Pin 22 | RD2/PSP2 — Port D bit 2 / Parallel slave port bit 2 |
| Pin 23 | RD3/PSP3 — Port D bit 3 / Parallel slave port bit 3 |
| Pin 24 | RD4/PSP4 — Port D bit 4 / Parallel slave port bit 4 |
| Pin 25 | RD5/PSP5 — Port D bit 5 / Parallel slave port bit 5 |
| Pin 26 | RD6/PSP6 — Port D bit 6 / Parallel slave port bit 6 |
| Pin 27 | RD7/PSP7 — Port D bit 7 / Parallel slave port bit 7 |
| Pin 28 | RB7/PGD — Port B bit 7 / ICSP data line |
Typical Applications
PIC16LC773T-I/SO is suitable for 6 applications: Appliance Control Panels, Industrial Sensor Interface Modules, Low-Cost Motor Driver Controllers, Consumer White-Goods Embedded Control, HVAC Thermostat Front-Ends, Battery-Operated Remote Controllers.
Appliance Control Panels
The PIC16LC773T-I/SO fits appliance control panels where the firmware is finalized, volumes are high, and 7KB OTP memory is sufficient. With 22 I/O pins, the MCU drives keypads, LED indicators, and a character LCD directly, while the integrated USART links to a host inverter or sensor board. The 2.5V-5.5V VDD range allows operation from a single 3.3V or 5V rail, removing the need for a second regulator on the appliance main board.
Recommended
Industrial Sensor Interface Modules
For industrial front-end modules reading analog sensors and reporting over RS-232 or RS-485, the PIC16LC773T-I/SO provides a 12-bit ADC with up to six channels, a hardware USART, and the MSSP peripheral for SPI sensors. The 256-byte RAM is sufficient for buffering a few hundred samples before forwarding, and the 20MHz CPU cycles each ADC conversion in microseconds. The -40C to +85C industrial temperature range lets the part operate inside unheated cabinets on the factory floor.
Recommended
Low-Cost Motor Driver Controllers
Small DC and stepper motor driver boards pair the PIC16LC773T-I/SO with external H-bridge ICs; the MCU provides PWM via Timer2, direction logic on PORTA, and fault feedback through the analog comparators. The 20MHz CPU keeps commutation loops in the 200ns-instruction range, well below the 1ms mechanical time constants of small motors. Designers appreciate that 7KB OTP holds the entire speed-table and acceleration-profile logic without external memory.
Recommended
Consumer White-Goods Embedded Control
Washing machines, dishwashers, and small kitchen appliances use the PIC16LC773T-I/SO to handle button inputs, valve drivers, water-level sensing, and buzzer feedback. The 2.5V-5.5V VDD range supports a 3.3V or 5V supply, while the 12-bit ADC handles temperature and turbidity analog signals. The OTP program memory reduces per-unit silicon cost at the volumes typical of white-goods production.
Recommended
HVAC Thermostat Front-Ends
Wall-mounted thermostat designs use the PIC16LC773T-I/SO to scan the keypad, read thermistor or solid-state temperature sensors via the 12-bit ADC, and drive the relay that switches the HVAC system. The integrated analog comparators provide hysteresis on the temperature trip points, eliminating external comparator chips. The industrial -40C to +85C range survives attic and outdoor-cabinet mounting.
Recommended
Battery-Operated Remote Controllers
Battery-powered remote controllers and handheld service tools benefit from the LC family's low-voltage operation down to 2.5V, which lets the PIC16LC773T-I/SO run directly from two AA alkaline cells. The hardware USART supports IR or RF module communication, and the 22 I/O pins drive button matrices and LED indicators. The 256-byte RAM is enough for command buffering in a 1-2 second active window between deep sleeps.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LC773T-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LC773-I/SO | PIC16LC773T/SO | PIC16F877A-I/SO | PIC16LC771T-I/SO |
|---|---|---|---|---|---|
| Package | SOIC-28 (7.50mm) | SOIC-28 (7.50mm) - same | SOIC-28 (7.50mm) - same | SOIC-28 (7.50mm) - same | SOIC-28 (7.50mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 7KB (4K x 14) OTP | 7KB (4K x 14) OTP | 7KB (4K x 14) OTP | 8KB Flash | 4KB (2K x 14) OTP |
| RAM Size | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes |
| Maximum Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Supply Voltage | 2.5V - 5.5V | 2.5V - 5.5V | 2.5V - 5.5V | 2.0V - 5.5V | 2.5V - 5.5V |
| I/O Pins | 22 | 22 | 22 | 22 | 22 |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | 0C to +70C (Commercial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| Memory Type | OTP EPROM | OTP EPROM | OTP EPROM | Flash | OTP EPROM |
| Packaging Form | Tape and Reel | Tube | Tape and Reel | Tube | Tape and Reel |
Key Differentiators
- Low-voltage 2.5V minimum VDD vs standard PIC16C773 at 3.0V (vs PIC16C773-I/SO)
- Flash reprogrammability on the same SOIC-28 footprint (vs PIC16F877A-I/SO)
- Tape and reel packaging form for SMT assembly (vs PIC16LC773-I/SO)
Design Notes
The PIC16LC773T-I/SO uses OTP memory; once the bit cells are programmed they cannot be electrically erased. Plan the OTP programming step into the production flow and ensure firmware is fully validated before programming. Always include the ICSP pins (RB6/RB7) on a header or test pad so blank parts can be programmed after PCB assembly, since OTP devices cannot be re-flashed if a bug is found post-release.
Decouple VDD with a 100nF ceramic capacitor placed within 5mm of the VDD pin, and add a 10uF bulk capacitor on the supply rail. The PIC16LC family supports brown-out reset and power-on reset internally; configure the BOR voltage in the configuration word to match your supply rail so the part does not run at indeterminate logic levels during slow power-up ramps.
Route the oscillator traces short and surround them with a ground guard ring to minimize EMI pickup. If using a crystal, place load capacitors within 3mm of the OSC1/OSC2 pins. The analog inputs (RA0-RA5) should be guarded with a digital-only ground island to avoid switching noise coupling into ADC samples; reference the Microchip PIC16C77X datasheet figure on ADC layout recommendations.
Compliance Information
Microchip declares PIC16LC773T-I/SO RoHS compliant with lead-free matte-tin plating on the SOIC-28 package. REACH compliance status confirmed per lot declaration; AEC-Q100 not applicable as the part is not automotive-qualified.
