PIC16C76-20E/SO - 8-bit 20MHz OTP MCU, 14KB EPROM | Microchip
MPN: PIC16C76-20E/SO ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.79 | $6.79 |
| 10 | $6.11 | $61.10 |
| 100 | $5.43 | $543.00 |
| 500 | $4.89 | $2,445.00 |
| 1,000 | $4.35 | $4,350.00 |
PIC16C76-20E/SO Overview
An 8-bit microcontroller (MCU) is a small computer-on-a-chip integrating a CPU, memory (program + data), and programmable peripherals on a single silicon die. PIC microcontrollers use a Harvard architecture with separate program and data buses, paired with a精简 (RISC) instruction set that executes one instruction per clock cycle (except branches). The PIC16C76 sits in the mid-range PIC16 family, which sits under the broader PICmicro taxonomy of 8-bit, 16-bit, and 32-bit families, itself a sub-class of microcontrollers (MCUs) within the embedded semiconductor hierarchy.
Key features of the PIC16C76-20E/SO include 5 channels of 8-bit Analog-to-Digital conversion, two 8-bit timer/counters with capture/compare/PWM capability, a synchronous serial port configurable as either 3-wire SPI or 2-wire I2C, and a Universal Asynchronous Receiver Transmitter (USART) for asynchronous serial communication. The device supports high sink/source current of 25/25 mA per pin, eliminating the need for external drivers on many loads.
Architecturally, the PIC16C76 employs a 14-bit instruction word with a 35-instruction set, an 8-level deep hardware stack, and direct/indirect addressing modes with banking for both program and data spaces. Power consumption is rated at 15 uA typical at 5V / 4 MHz active, and 1 uA typical standby at 3V / 32 kHz, making it suitable for low-power industrial nodes.
Typical applications include industrial automation controllers, automotive body and chassis subsystems, consumer appliances, sensor-signal conditioning front-ends, and embedded control in legacy equipment. The 8-bit ADC and PWM peripherals are particularly well matched to closed-loop motor and valve control, while the SPI/I2C/USART trio enables straightforward bridging to sensors, EEPROMs, and host MCUs.
When designing with the PIC16C76-20E/SO, plan the oscillator and reset circuits around the datasheet recommended circuits (typical RC or crystal). Because the program memory is OTP, code must be fully verified before programming; for field-updatable designs consider the flash-based PIC16F76 counterpart in the same 28-pin SOIC footprint.
This page synthesizes distributor pricing, parametric comparison with the closest same-package drop-in alternatives, and practical design notes that complement but do not replace the manufacturer datasheet.
Drop-in alternatives for PIC16C76-20E/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 PIC16C76-20E/SO (same form factor and footprint) — differing in Package, Timers, Program Memory Size, Core Architecture, Program Memory Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16C76-20/SO
✅ Drop-In✓ In Stock
$6.42 / Unit
View Datasheet →PIC16C76-20I/SO
✅ Drop-In✓ In Stock
$5.74 / Unit
View Datasheet →PIC16C76-10I/SO
✅ Drop-In✓ In Stock
$5.3 / Unit
View Datasheet →PIC16F76-I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16C745-I/SP
✅ Drop-In✓ In Stock
$4.12 / Unit
View Datasheet →PIC16C66-20I/SO
✅ Drop-In✓ In Stock
$6.42 / Unit
View Datasheet →PIC16C76-20E/SO Maximum Ratings & Electrical Characteristics
| Product Type | 8-bit Microcontroller (MCU) |
| Family | PIC16C7X mid-range |
| Program Memory Size | 14 KB (8K x 14) OTP EPROM |
| RAM Size | 368 bytes |
| Data EEPROM | Not present on this OTP variant |
| Maximum Clock Frequency | 20 MHz |
| Supply Voltage Range | 4.0 V to 6.0 V |
| Number of I/O Pins | 22 |
| ADC | 5 channels x 8-bit |
| Timers | 2 x 8-bit Timer/Counter with CCP |
| Serial Interfaces | 1 x SSP (SPI / I2C), 1 x USART |
| Instruction Set | 35 instructions, 14-bit word |
| I/O Sink/Source Current | 25 mA / 25 mA |
| Active Current (typ) | 15 uA at 5 V / 4 MHz |
| Standby Current (typ) | 1 uA at 3 V / 32 kHz |
| Operating Temperature Range | -40 C to +125 C (Extended, 'E') |
| Package | 28-pin SOIC (0.295 in / 7.50 mm) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Lead-Free | Yes |
PIC16C76-20E/SO Pin Configuration
| Pin 1 | MCLR/VPP — Master Clear (input) or programming voltage (input) |
| Pin 2 | RA0/AN0 — PORTA bit 0 / ADC channel 0 |
| Pin 3 | RA1/AN1 — PORTA bit 1 / ADC channel 1 |
| Pin 4 | RA2/AN2 — PORTA bit 2 / ADC channel 2 |
| Pin 5 | RA3/AN3/VREF+ — PORTA bit 3 / ADC channel 3 / ADC positive reference |
| Pin 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Pin 7 | RA5/AN4/SS — PORTA bit 5 / ADC channel 4 / SPI slave select |
| Pin 8 | OSC2/CLKOUT — Oscillator output / clock output |
| Pin 9 | OSC1/CLKIN — Oscillator input / external clock input |
| Pin 10 | VSS — Ground reference |
| Pin 11 | VDD — Positive supply voltage (4.0 V to 6.0 V) |
| Pin 12 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| Pin 13 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 I/O |
| Pin 14 | RC2/CCP1 — PORTC bit 2 / CCP1 I/O |
| Pin 15 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Pin 16 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Pin 17 | RC5/SDO — PORTC bit 5 / SPI data out |
| Pin 18 | RC6/TX/CK — PORTC bit 6 / USART TX / USART clock |
| Pin 19 | RC7/RX/DT — PORTC bit 7 / USART RX / USART data |
| Pin 20 | VSS — Ground reference |
| Pin 21 | RB0/INT — PORTB bit 0 / external interrupt input |
| Pin 22 | RB1 — PORTB bit 1 |
| Pin 23 | RB2 — PORTB bit 2 |
| Pin 24 | RB3 — PORTB bit 3 |
| Pin 25 | RB4 — PORTB bit 4 |
| Pin 26 | RB5 — PORTB bit 5 |
| Pin 27 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Pin 28 | RB7/PGD — PORTB bit 7 / ICSP data |
Typical Applications
PIC16C76-20E/SO is suitable for 6 applications: Industrial Automation Controllers, Automotive Body and Chassis Modules, Consumer Appliance Control Boards, Sensor Signal Conditioning Front-Ends, Legacy Embedded Control Replacement, Educational and Hobbyist Development.
Industrial Automation Controllers
The PIC16C76-20E/SO is well matched to industrial automation controllers thanks to its 5-channel 8-bit ADC for analog sensor inputs (temperature, pressure, flow), two CCP modules that drive PWM outputs for proportional valves and motor speed, and a USART plus SSP for Modbus or I2C sensor networks. Its extended -40 to +125 C temperature grade supports factory-floor enclosures and outdoor cabinets. The 14 KB OTP program space holds typical ladder-logic replacement firmware with diagnostic state machines, while the 25 mA I/O drive removes the need for relay-driver buffers when switching 24 V coils through small transistors.
Recommended
Automotive Body and Chassis Modules
The PIC16C76-20E/SO is suitable for automotive body and chassis subsystems such as window lift controllers, seat position memory, lighting dimmers, and HVAC blend-door actuators. Its extended temperature rating (-40 to +125 C) handles under-dash environments, and the 25 mA I/O current directly drives small solenoids and LED arrays without external drivers. The 8-bit ADC monitors analog switches and position sensors, while the USART bridges to a vehicle body controller. OTP memory locks the firmware at production, preventing unauthorized reflashing by aftermarket toolchains.
Recommended
Consumer Appliance Control Boards
Consumer appliances such as washing machines, dishwashers, microwave ovens, and induction cooktops use the PIC16C76-20E/SO to coordinate user-interface keypads, motor drivers, and safety interlocks. The 22 I/O pins scan up to 88 matrix keys, the 5 ADC channels read thermistor inputs, and the CCP modules generate PWM for variable-speed drum or fan motors. The USART port connects to a diagnostic display or to a Wi-Fi module for smart-appliance connectivity. OTP memory secures the firmware IP against unauthorized cloning in high-volume white-goods manufacturing.
Recommended
Sensor Signal Conditioning Front-Ends
The PIC16C76-20E/SO functions as a smart sensor front-end, digitizing analog signals from load cells, thermistors, or bridge-type pressure sensors with its 5-channel 8-bit ADC and forwarding calibration-corrected data over SPI, I2C, or USART to a host processor. The CCP modules generate excitation pulses for ratiometric sensors, while the 25 mA I/O directly drives 4-20 mA loops through a single transistor. With 15 uA active current at 5 V/4 MHz, battery-powered remote sensor nodes can run for years on a single lithium cell when duty-cycled via the 1 uA standby mode.
Recommended
Legacy Embedded Control Replacement
The PIC16C76-20E/SO is used to repair and sustain legacy equipment in industrial, medical, and aerospace systems where the original OTP firmware is locked and re-spinning a PCB is cost-prohibitive. The pin-compatible PIC16C76-20/SO and PIC16C76-20I/SO family members share the same 28-SOIC footprint, enabling drop-in service replacements when an original part fails. Distributors stocking obsolete Microchip parts (Heisener, MicrochipUSA, AiPCBA) often have small quantities for service and refurbishment contracts, though extended lead times are typical.
Recommended
Educational and Hobbyist Development
The PIC16C76-20E/SO and its family siblings (PIC16F76, PIC16C76-20/SO) are popular in university embedded-systems courses and hobbyist projects because the PIC16 mid-range instruction set has 35 instructions that students can master quickly. The 28-SOIC package is breadboard-friendly with breakout boards, and the integrated peripherals (ADC, PWM, SPI, I2C, USART) cover the full span of an introductory MCU curriculum. MPLAB X IDE with MPASM or XC8 compilers provides free development tools, and PICkit programmers support both OTP and flash variants for hands-on lab exercises.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C76-20E/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C76-20/SO | PIC16C76-20I/SO | PIC16C76-10I/SO | PIC16F76-I/SO | PIC16C745-I/SP | PIC16C66-20I/SO |
|---|---|---|---|---|---|---|---|
| Package | 28-SOIC | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 14 KB OTP | 14 KB OTP | 14 KB OTP | 14 KB OTP | 14 KB Flash | 8 KB OTP | 8 KB OTP |
| Max Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 10 MHz | 20 MHz | 24 MHz | 20 MHz |
| ADC Channels | 5 x 8-bit | 5 x 8-bit | 5 x 8-bit | 5 x 8-bit | 5 x 8-bit | 5 x 8-bit | 5 x 8-bit |
| Temperature Grade | Extended (-40 to +125 C) | Commercial (0 to +70 C) | Industrial (-40 to +85 C) | Industrial (-40 to +85 C) | Industrial (-40 to +85 C) | Industrial (-40 to +85 C) | Industrial (-40 to +85 C) |
| Memory Type | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM | Flash | OTP EPROM | OTP EPROM |
| USB Interface | None | None | None | None | None | USB 1.1 FS | None |
Key Differentiators
- Extended temperature grade for harsh environments (vs PIC16C76-20/SO)
- Field-upgradeable flash alternative available (vs PIC16C76-20I/SO)
- Adds USB 1.1 full-speed peripheral (vs PIC16C745-I/SP)
Design Notes
Estimated: at 20 MHz clock and VDD = 5.0 V, the PIC16C76-20E/SO active current is on the order of 15 mA (data sheet typical 15 mA at 5 V / 4 MHz scales to roughly 30-50 mA at 20 MHz depending on I/O loading). Place a 0.1 uF ceramic decoupling capacitor within 5 mm of the VDD pin and a bulk 10 uF tantalum or aluminum polymer cap on the supply rail. Use a low-ESR bypass such as Murata GRM21BR71C105KA01 to suppress switching transients from the internal clock tree.
Keep the 28-SOIC pin 1 orientation consistent (notch/dot at top-left) and provide a guard ring around the MCLR/VPP pin to prevent ESD-induced resets during in-circuit programming. Per the PIC16C7X datasheet, an external pull-up of 10-50 kOhm on MCLR prevents spurious resets. Route the crystal traces (OSC1/OSC2) short and symmetric with a ground guard to minimize EMI pickup; place load capacitors (typically 15-33 pF for a 20 MHz crystal) within 5 mm of the oscillator pins.
Do not assume the PIC16C76-20E/SO has data EEPROM - it integrates only OTP program memory and 368 B general-purpose RAM; non-volatile user data must be stored in program memory via RETLW/PFSEM tables or externally with an I2C EEPROM such as 24LC256. The OTP nature means a verification cycle must precede production programming; once programmed, devices cannot be electrically erased. For last-minute firmware changes, choose the flash-based PIC16F76-I/SO drop-in replacement in the same 28-SOIC footprint.
Compliance Information
RoHS and REACH compliance per Microchip product page. Not AEC-Q100 qualified (extended grade is not automotive-qualified per Microchip's automotive product catalog). Halogen-free status not explicitly stated in available data.
