PIC16F676-E/P - 8-Bit 20MHz Flash MCU | Microchip Technology
MPN: PIC16F676-E/P ✓ ActivePIC16F676-E/P Overview
A PIC microcontroller is a programmable system-on-chip category combining a CPU, program memory, data memory, I/O ports, and integrated peripherals. The PIC16F676 belongs to the PIC16 mid-range family, where a small instruction set, dedicated I/O, and low component count make it useful for control-oriented products that do not require a high-performance 32-bit processor.
The PIC16F676-E/P provides 1.75 KB, or 1K by 14 words, of flash program memory and 64 bytes of RAM for firmware and working variables. Its key differentiator is an integrated 10-bit analog-to-digital converter with 8 channels. Additional control resources include digital I/O, comparators, a watchdog timer, and an internal oscillator, allowing compact designs without requiring several external support components.
Microchip describes the PIC16F630 and PIC16F676 as identical except for the 10-bit A/D converter, which is present on the PIC16F676. The 200 ns instruction execution capability supports responsive control loops, while the 35 single-word instructions can reduce firmware size. The -E/P ordering identifies the extended-temperaturegrade device supplied in a 14-pin PDIP package.
Typical uses include compact temperature controllers, simple motor and relay controllers, LED status panels, battery-operated instruments, digital timers, and analog sensing systems. The integrated ADC is particularly useful when the design must monitor several analog inputs while retaining a small pin count and straightforward embedded-control workflow.
When laying out a design, begin with the PIC16F676-E/P pinout and preserve the 14-pin PDIP footprint rather than assuming compatibility with a 20-pin or surface-mount variant. Confirm oscillator, programming, reset, analog-input, and supply connections against the manufacturer data sheet. The comparator and ADC share analog resources, so their configuration and multiplexing must be checked for the intended channel sequence.
This page combines manufacturer specifications, verified distributor listings, package details, strict drop-in alternatives, and practical design guidance. It is intended to help engineers identify the correct grade and package, compare compatible replacements, and move directly from component selection to PCB and firmware validation.
Drop-in alternatives for PIC16F676-E/P — 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 PIC16F676-E/P (same form factor and footprint) — differing in Package, Architecture, Instruction Execution Time, Supply Voltage Range, Data EEPROM.
PIC16F676-I/P
✅ Drop-InContact for price
View Datasheet →PIC16F630-I/P
✅ Drop-InContact for price
View Datasheet →PIC16F630-E/P
✅ Drop-InContact for price
View Datasheet →PIC16F676A-I/P
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC16F676A-E/P
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PIC16F676-E/P Maximum Ratings & Electrical Characteristics
| Microcontroller Type | 8-bit CMOS flash-based microcontroller |
| Maximum Clock Speed | 20 MHz |
| Instruction Execution Time | 200 ns |
| Instruction Set | 35 single-word instructions |
| Program Memory Type | Flash |
| Program Memory Size | 1.75 KB (1K x 14 words) |
| RAM Size | 64 bytes |
| ADC Resolution | 10 bits |
| ADC Channels | 8 channels |
| I/O Port Count | 12 I/O |
| Supply Voltage Range | 4.5 V to 5.5 V |
| Package | 14-pin PDIP |
| Package Type | CDIP, 0.300 inch, lead-free, PDIP-14 |
| Mounting Style | Through-hole |
| Temperature Grade | Extended temperature |
| Lifecycle Status | Active |
PIC16F676-E/P Pin Configuration
| Pin 1 | VSS — Ground reference |
| Pin 2 | RA5 — General-purpose I/O RA5 |
| Pin 3 | RA4 — General-purpose I/O RA4 |
| Pin 4 | RA3/MCLR — General-purpose I/O RA3 and master clear reset input |
| Pin 5 | RA2 — General-purpose I/O RA2 |
| Pin 6 | RA1 — General-purpose I/O RA1 |
| Pin 7 | RA0 — General-purpose I/O RA0 |
| Pin 8 | RE3 — General-purpose I/O RE3 |
| Pin 9 | RE2 — General-purpose I/O RE2 |
| Pin 10 | RE1 — General-purpose I/O RE1 |
| Pin 11 | RE0 — General-purpose I/O RE0 |
| Pin 12 | RA6/OSC1 — General-purpose I/O RA6 or oscillator input |
| Pin 13 | RA7/OSC2 — General-purpose I/O RA7 or oscillator output |
| Pin 14 | VDD — Positive supply voltage |
Typical Applications
PIC16F676-E/P is suitable for 6 applications: Temperature and Analog Monitoring Controller, Small Relay and Indicator Controller, Battery-Powered Instrument, Motor and Actuator Control, Digital Timer and Sequence Panel, Industrial Sensor Interface.
Temperature and Analog Monitoring Controller
The PIC16F676-E/P fits compact analog-monitoring products because its integrated 10-bit ADC provides 8 channels without requiring a separate converter. A controller can sample temperature sensors, potentiometers, or resistive dividers and then drive indicators through its digital I/O. The 20 MHz clock supports timely sampling and control, while the 14-pin PDIP package simplifies through-hole assembly and prototype rework. The principal design consideration is configuring the ADC channel sequence, reference source, and acquisition timing correctly; the ADC cannot be treated as interchangeable with the no-ADC PIC16F630.
Recommended
Small Relay and Indicator Controller
The PIC16F676-E/P is appropriate for small relay, LED, and status-indicator controllers because it combines 1.75 KB of flash program memory with 20 MHz processing in a compact 14-pin package. Firmware can implement debouncing, blink patterns, timing sequences, and multiple output states without external programmable logic. Its 4.5 V to 5.5 V operating range simplifies conventional 5 V control designs. Engineers should confirm the required I/O count and drive-current limits, and provide appropriate transistor or driver circuitry rather than switching inductive loads directly.
Recommended
Battery-Powered Instrument
The PIC16F676-E/P can serve as the control core of a small battery-powered instrument because its compact package limits board area and its 64 bytes of RAM supports lightweight working data. A 200 ns instruction execution time helps the firmware handle button input, display updates, and periodic ADC measurements. Because the exact supply-voltage reference in the verified data is 4.5 V to 5.5 V, the battery and regulator must support that range or include an appropriate conversion stage. Low-power behavior should be measured in the final firmware and board configuration.
Recommended
Motor and Actuator Control
The PIC16F676-E/P can implement basic motor, valve, or actuator sequencing where the required control bandwidth fits an 8-bit MCU. Its 20 MHz clock and 200 ns instruction execution support responsive state-machine control, while the integrated ADC allows the controller to monitor an analog command or feedback signal. The MCU should drive the load through suitable transistor, MOSFET, or driver circuitry rather than directly powering motors. Flyback protection, current limits, inductive-load transients, and grounding must be addressed at the board level.
Recommended
Digital Timer and Sequence Panel
The PIC16F676-E/P is well suited to digital timers, panel sequencers, and programmable indicator boards because its flash memory can retain a control program and its GPIO can operate multiple panel elements. The 35-instruction set helps compact the firmware for countdown, debounce, and sequence functions, while the 10-bit ADC can add analog controls if required. The PDIP format is especially convenient for prototypes and through-hole industrial panels. Firmware should define behavior during reset and power loss so the output state remains predictable when the controller restarts.
Recommended
Industrial Sensor Interface
The PIC16F676-E/P can act as a compact sensor-interface node when the monitored quantity fits an 8-channel, 10-bit ADC and the local control logic remains straightforward. It can convert analog sensor readings into digital status, provide thresholding, and forward information through a simple communications interface. The 20 MHz execution rate supports deterministic sampling and filtering, while the extended-temperaturegrade ordering supports a wider environmental envelope than the industrial variant. Designers should still verify local noise conditions, grounding, connector protection, and isolation requirements.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F676-E/P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F676-I/P | PIC16F630-I/P | PIC16F630-E/P | PIC16F676A-I/P | PIC16F676A-E/P |
|---|---|---|---|---|---|---|
| Package | 14-pin PDIP | 14-pin PDIP | 14-pin PDIP | 14-pin PDIP | 14-pin PDIP | 14-pin PDIP |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Product Type | 8-bit CMOS flash-based microcontroller | 8-bit CMOS flash-based microcontroller | 8-bit CMOS flash-based microcontroller | 8-bit CMOS flash-based microcontroller | 8-bit CMOS flash-based microcontroller | 8-bit CMOS flash-based microcontroller |
| Maximum Clock Speed | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Program Memory | 1.75 KB flash (1K x 14 words) | 1.75 KB flash (1K x 14 words) | 1.75 KB flash (1K x 14 words) | 1.75 KB flash (1K x 14 words) | 1.75 KB flash (1K x 14 words) | 1.75 KB flash (1K x 14 words) |
| RAM | 64 bytes | 64 bytes | 64 bytes | 64 bytes | 64 bytes | 64 bytes |
| ADC | 10-bit, 8 channels | 10-bit, 8 channels | Not available | Not available | 10-bit, 8 channels | 10-bit, 8 channels |
| Temperature Ordering | Extended temperature (-E) | Industrial temperature (-I) | Industrial temperature (-I) | Extended temperature (-E) | Industrial temperature (-I) | Extended temperature (-E) |
Key Differentiators
- Integrated eight-channel analog conversion (vs PIC16F630-I/P)
- Extended-temperature ordering option (vs PIC16F676-I/P)
- Compact 14-pin control solution (vs PIC16F676A-I/P)
Design Notes
Design the supply network for the verified 4.5 V to 5.5 V operating range and place the local decoupling capacitance at the VDD and VSS pins of the PIC16F676-E/P. Keep switching-regulator and relay-supply wiring away from the ADC inputs. Confirm the regulator tolerance, startup behavior, and ground-return path on the completed board because a microcontroller can appear to malfunction when its supply is disturbed even though the nominal 5 V rail appears correct.
Use the 14-pin PDIP footprint exactly as shown in the manufacturer pinout and verify the orientation of pin 1 before soldering. The -E/P suffix identifies the 14-pin through-hole package; a surface-mount order code cannot be assumed to share the same footprint. Route programming, MCLR, oscillator, and analog signals according to the selected configuration, and provide adequate clearances around the socket or package for inspection and rework.
Do not substitute PIC16F630 for PIC16F676 without treating the ADC as a major functional change. The manufacturer data sheet states that the devices are identical except for the A/D converter, but a program written for the PIC16F676 may depend on ADC channels, analog multiplexing, comparator relationships, and interrupt behavior. Validate the replacement with the production firmware, analog accuracy tests, and the complete peripheral configuration rather than checking only the package pins.
Treat analog inputs as precision signal paths: use short traces, keep them away from switching nodes and oscillator circuitry, and provide local return paths to the device ground. The 10-bit ADC is useful for monitoring sensors, but its practical accuracy depends on reference quality, source impedance, acquisition time, and PCB leakage. Verify the analog network with the intended sensor, reference configuration, and firmware sampling sequence.
Compliance Information
The verified package listing identifies PIC16F676-E/P as lead-free. Explicit RoHS, REACH, AEC-Q100, halogen-free, and conflict-minerals statements were not included in the supplied data.
