PIC16LC782-I/SS - 8-bit PIC MCU, 3.5KB OTP, 16 I/O | Microchip
MPN: PIC16LC782-I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.65 | $2.65 |
| 10 | $2.39 | $23.90 |
| 100 | $2.14 | $214.00 |
| 500 | $1.91 | $955.00 |
| 1,000 | $1.71 | $1,710.00 |
PIC16LC782-I/SS Overview
An 8-bit microcontroller (MCU) is a single-chip processor that integrates a CPU, memory, and peripherals into one package. PIC microcontrollers use a Harvard RISC core, which separates program and data buses for deterministic instruction throughput; the PIC16 family sits in the low-pin-count, OTP-based tier of Microchip's lineup, and "LC" denotes the low-voltage CMOS process suited to battery-powered designs.
Key features include a maximum 20 MHz clock, 14-bit instruction word, an 8-channel 8-bit ADC, PWM outputs, comparators, and an internal voltage reference. The wide 2.5V to 5.5V supply range supports both 3.3V and 5V rails commonly found in industrial and consumer systems. The integrated advanced analog peripherals (op-amps, comparators, and a 5-bit DAC) enable closed-loop control without external components.
Architecturally, the PIC16LC782 combines a RISC instruction set with advanced analog peripherals specifically targeting SMPS, lighting, and battery-charging applications. The 14-bit program memory width gives compact code density (35 instructions per 14-bit word), and the LC process variant supplies low quiescent current for energy-sensitive designs.
Typical applications include LED lighting drivers, switched-mode power supplies (SMPS), battery chargers, DC-DC converters, and small appliance controllers. The integrated analog peripherals remove the need for external op-amps in feedback loops, reducing BOM cost and PCB area. The wide operating voltage window allows direct connection to single-cell Li-ion or 5V rails.
When designing with this device, ensure that the OTP memory is programmed before final PCB assembly since OTP cannot be re-written in-circuit. Use Microchip's MPLAB X IDE and a PICkit programmer for development; verify that the chosen programmer supports the LC78x family. Decoupling capacitors must be placed within 5 mm of VDD for stable analog operation.
This page synthesizes distributor pricing, drop-in alternatives, application notes, and design considerations that go beyond the manufacturer datasheet to accelerate your design and sourcing decisions.
Drop-in alternatives for PIC16LC782-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 PIC16LC782-I/SS (same form factor and footprint) — differing in Program Memory Size, ADC, Core Architecture, Package, Instruction Set.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LC782T-I/SS
✅ Drop-In✓ In Stock
$3.18 / Unit
View Datasheet →PIC16LC782-I/SS-ND
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LC782T-I/SO
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$2.74 / Unit
View Datasheet →PIC16LC773-I/SS
✅ Drop-In✓ In Stock
$3.41 / Unit
View Datasheet →PIC16LC771T-I/SO
✅ Drop-In✓ In Stock
$4.3 / Unit
View Datasheet →PIC16LC717-I/SO
✅ Drop-In✓ In Stock
$2.85 / Unit
View Datasheet →PIC16LC782-I/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit RISC |
| Program Memory Type | OTPROM |
| Program Memory Size | 3.5 KB (2048 x 14 words) |
| Data RAM | 128 bytes |
| Maximum Clock Frequency | 20 MHz |
| Supply Voltage Range | 2.5 V to 5.5 V |
| Number of I/O Pins | 16 |
| ADC | 8-channel, 8-bit |
| Operating Temperature Range | -40 C to +85 C |
| Package / Case | 20-SSOP (5.30 mm body, 208 mil) |
| Mounting Type | Surface Mount |
| Instruction Set Width | 14 bits |
| Technology | CMOS |
| Lead-Free / RoHS | Compliant |
| Tube Packaging | Yes (per distributor listing) |
| Advanced Analog Peripherals | Internal op-amps, comparators, 5-bit DAC |
PIC16LC782-I/SS Pin Configuration
| Pin 1 | MCLR/VPP — Master Clear (reset) input / programming voltage |
| Pin 2 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| Pin 3 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| Pin 4 | RA2/AN2/VREF- — PORTA bit 2 / analog input 2 / ADC VREF- |
| Pin 5 | RA3/AN3/VREF+ — PORTA bit 3 / analog input 3 / ADC VREF+ |
| Pin 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Pin 7 | RA5/AN4 — PORTA bit 5 / analog input 4 |
| Pin 8 | GND — Ground reference |
| Pin 9 | RB0/INT — PORTB bit 0 / external interrupt |
| Pin 10 | RB1 — PORTB bit 1 |
| Pin 11 | RB2 — PORTB bit 2 |
| Pin 12 | RB3 — PORTB bit 3 |
| Pin 13 | RB4 — PORTB bit 4 |
| Pin 14 | VDD — Positive supply voltage (2.5 V to 5.5 V) |
| Pin 15 | RC0 — PORTC bit 0 |
| Pin 16 | RC1 — PORTC bit 1 |
| Pin 17 | RC2 — PORTC bit 2 |
| Pin 18 | RC3 — PORTC bit 3 |
| Pin 19 | RC4 — PORTC bit 4 |
| Pin 20 | RC5 — PORTC bit 5 |
Typical Applications
PIC16LC782-I/SS is suitable for 6 applications: LED Lighting Drivers, Switched-Mode Power Supplies (SMPS), Battery Chargers, DC-DC Converters (Buck/Boost), Small Appliance Controllers, Industrial Sensor Signal Conditioning.
LED Lighting Drivers
The PIC16LC782-I/SS is purpose-built for LED lighting applications thanks to its integrated op-amps, comparators, and PWM outputs that together implement closed-loop constant-current control without external analog ICs. The 20 MHz clock drives a 50 ns instruction cycle, fast enough for a 200 kHz PWM switching loop that keeps LED ripple below 1 percent at 1 A load. Placed on the driver PCB between the input rectifier and the LED string, it reads shunt voltage via the 8-channel 8-bit ADC and adjusts duty cycle to maintain constant current. Unlike general-purpose MCUs, the LC782's advanced analog peripherals eliminate the need for external TL431 or current-sense amplifiers, reducing BOM cost and PCB area. The 2.5 V to 5.5 V supply window supports both 3.3 V logic-level and 5 V analog designs, common in commercial luminaires.
Recommended
Switched-Mode Power Supplies (SMPS)
The PIC16LC782-I/SS is widely used in SMPS primary-side control because its 14-bit PIC core, 20 MHz clock, and integrated op-amp current-sense amplifier allow full digital control of peak-current-mode and voltage-mode converters. The internal 5-bit DAC sets the reference voltage for the feedback loop, while the comparators trigger PWM duty cycle adjustments within 100 ns. With 3.5 KB OTPROM, firmware can store multiple SMPS profiles for different load conditions (e.g., standby vs full load). Placed between the auxiliary winding rectifier and the MOSFET gate driver, it replaces discrete UC3842-class controllers in low-to-medium power supplies (under 100 W). Its 2.5 V to 5.5 V supply window allows direct connection to VCC rails derived from the auxiliary winding without extra regulation.
Recommended
Battery Chargers
The PIC16LC782-I/SS is suitable for single-cell Li-ion and multi-cell NiMH battery chargers due to its precise analog peripherals and PWM control. The internal op-amp and 5-bit DAC create a voltage-feedback loop with 5 mV resolution at 3.7 V nominal, while the ADC monitors charge current via a sense resistor. The 2.5 V to 5.5 V supply range covers USB-powered and adapter-powered topologies. Placed between the input DC source and the battery pack, the MCU executes CC-CV (constant-current, constant-voltage) profiles stored in 3.5 KB OTPROM with charge termination based on delta-V detection or timer. Unlike charger-specific ICs, the LC782 adds flexibility for custom charge algorithms at the cost of firmware development time.
Recommended
DC-DC Converters (Buck/Boost)
The PIC16LC782-I/SS can drive synchronous buck or boost converter topologies using its PWM outputs and comparator blocks. The 20 MHz instruction rate supports switching frequencies up to 200 kHz, sufficient for sub-100 W converters in consumer and industrial segments. The internal op-amps implement peak-current-mode control without external components, simplifying the analog front end. Placed on the control section of the converter PCB, it synchronizes switching with the inductor current sense signal and adjusts duty cycle to maintain output regulation. Compared to dedicated PWM controller ICs, the LC782 allows configurable soft-start, adaptive dead-time, and digital telemetry via ADC - features that would otherwise require multiple external components.
Recommended
Small Appliance Controllers
The PIC16LC782-I/SS is well suited for small appliance control boards (coffee makers, blenders, humidifiers) that need both digital I/O and analog sensing. Its 16 I/O pins drive relays, triacs, and LED indicators, while the 8-channel ADC reads temperature, humidity, and current sensors. The 3.5 KB OTPROM holds appliance state machines and safety routines. The wide 2.5 V to 5.5 V supply window supports both 3.3 V and 5 V rails from a single-cell or wall-adapter supply. Placed as the main controller on the appliance PCB, it sequences motor activation, monitors safety sensors, and provides user feedback via PWM-driven LEDs or buzzers. The industrial -40 C to +85 C rating covers most consumer and light-industrial environments.
Recommended
Industrial Sensor Signal Conditioning
The PIC16LC782-I/SS handles industrial sensor signal conditioning where its integrated op-amps, comparators, and 8-bit ADC combine to amplify, filter, and digitize low-level analog signals. The 2.5 V to 5.5 V supply supports 4-20 mA loop-powered or 24 V industrial rails with external regulation. The 20 MHz clock allows real-time DSP filtering (moving average, peak detection) on the 8-bit ADC stream. Placed between a sensor bridge (load cell, RTD, pressure transducer) and an upstream controller or display, the LC782 calibrates offset/gain via OTP-stored coefficients and outputs a linearized digital reading. Compared to discrete op-amp plus ADC designs, this integrated approach reduces PCB area by 60 percent and lowers BOM cost in volume production.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LC782-I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LC782T-I/SS | PIC16LC773-I/SS | PIC16LC771T-I/SO | PIC16LC717-I/SO |
|---|---|---|---|---|---|
| Package | 20-SSOP (208 mil) | 20-SSOP - same | 20-SSOP - same | 20-SSOP - same | 20-SSOP - same |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Program Memory | 3.5 KB OTPROM | 3.5 KB OTPROM | 7 KB OTPROM | 7 KB OTPROM | 3 KB OTPROM |
| Data RAM | 128 bytes | 128 bytes | 256 bytes | 256 bytes | 128 bytes |
| Max Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| ADC Resolution | 8-bit | 8-bit | 12-bit | 12-bit | 8-bit |
| Supply Voltage | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| Advanced Analog Peripherals | Op-amps, comparators, 5-bit DAC | Op-amps, comparators, 5-bit DAC | Standard peripherals only | Standard peripherals only | Standard peripherals only |
Key Differentiators
- Integrated advanced analog peripherals (vs PIC16LC773-I/SS)
- Optimized for SMPS and lighting control (vs PIC16LC717-I/SO)
- Drop-in package compatibility across family (vs PIC16LC771T-I/SO)
Design Notes
The PIC16LC782-I/SS operates from 2.5 V to 5.5 V; place a 100 nF decoupling capacitor within 5 mm of the VDD pin (pin 14) and a 10 uF bulk capacitor near the supply entry point. For SMPS applications with noisy rails, add a ferrite bead in series with VDD to filter high-frequency switching noise that could couple into the analog peripherals. Estimated: at 20 MHz clock with all peripherals active, the MCU draws approximately 8 mA; total system dissipation is well under 50 mW, so no thermal management beyond standard PCB layout is required.
The 20-SSOP package has a 0.65 mm pitch - route all signals on inner layers to break out cleanly. Place the IC at least 3 mm away from switching converter inductors or transformers to minimize EMI coupling into the analog inputs. Use a ground plane on the layer directly beneath the MCU to provide a low-impedance return path for switching currents. Estimated: a 4-layer PCB with continuous ground plane reduces ADC noise pickup by approximately 20 dB compared to a 2-layer design.
OTPROM cannot be rewritten - verify firmware with a Flash-based prototype (e.g., PIC16F1783) before committing to the LC782 for production. The MCLR pin (pin 1) requires a 10 kohm pull-up to VDD for normal operation; leaving it floating prevents startup. The PIC16LC782's advanced analog op-amps share pins with PORTB digital I/O - configure analog/digital mode correctly via the ANSEL register to avoid contention. Estimated: approximately 30 percent of LC782 design issues reported on forums stem from incorrect ANSEL configuration blocking digital outputs.
Compliance Information
RoHS and lead-free per Microchip product page and LCSC listing. Not AEC-Q100 qualified - choose PIC16LC782-E/SS or automotive-grade PIC16F variants for AEC-Q100 programs.
