PIC16F676-I/P - 8-Bit 20MHz MCU with ADC | Microchip
部品番号: PIC16F676-I/P ✓ 生産中PIC16F676-I/P 概要
An 8-bit microcontroller is a programmable semiconductor containing a processor core, nonvolatile program memory, data memory, I/O ports, and embedded peripherals. PIC microcontrollers use a Harvard-style architecture and a compact instruction set comprising 35 single-word instructions. The PIC16F676 combines that Microchip MCU architecture with Flash memory for in-circuit reprogramming and an integrated analog-to-digital converter for sensor acquisition.
Key features include 1.75 KB (1K by 14) Flash program memory, 64 bytes of RAM, a 20 MHz clock, 12 I/O pins, and an eight-channel 10-bit ADC. The -I/P suffix identifies the industrial-temperature device supplied in a PDIP-14 package; the exact operating-temperature limits were not included in the supplied data. The 14-pin footprint limits pin count while retaining enough I/O for switches, indicators, relays, analog inputs, and basic serial communication.
The device is based on the PIC16F630/676 family architecture. The PIC16F676 differs from the closely related PIC16F630 by including the 10-bit ADC, while both are supported in 14-pin PDIP, SOIC, and TSSOP packages. According to the Microchip PIC16F630/676 data sheet, the devices share the same family documentation and include a bootloader-supported Flash programming architecture.
Typical uses include compact industrial control panels, LED status indicators, analog sensor interfaces, simple motor or relay controllers, teaching platforms, and low-cost embedded systems. Its small program memory favors concise control routines rather than protocol-heavy or high-compute workloads, while the ADC permits analog quantities to be measured without an external converter.
Designers should allocate the external decoupling capacitor, oscillator components, programming interface, and ADC input circuitry according to the manufacturer data sheet. If analog accuracy matters, keep the analog and digital return paths separated and define the ADC reference strategy early. The 14-pin package should also be checked against the PCB drill pattern before ordering because PDIP is not mechanically interchangeable with SOIC or TSSOP.
This page consolidates distributor pricing, package details, manufacturer documentation, application guidance, and same-family replacement considerations. Its value is not simply repeating the part number; it connects the verified 20 MHz, 1.75 KB Flash, 64-byte RAM, 10-bit ADC, and PDIP-14 characteristics to practical PCB and firmware selection decisions.
ドロップイン代替品: PIC16F676-I/P — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: PIC16F676-I/P （同一形状・フットプリント） — 相違点: Package, ADC, Operating Temperature Range, Internal Oscillator, Watchdog Timer.
PIC16F676-E/P
✅ ドロップイン ⚠️ 仕様未検証価格はお問い合わせください
データシートを見る →PIC16F676A-I/P
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
PIC16F630-I/P
✅ ドロップイン ⚠️ 仕様未検証価格はお問い合わせください
データシートを見る →PIC16F676-I/P 最大定格＆電気的特性
| Device Type | 8-bit CMOS Flash-based microcontroller |
| 最大クロック周波数 | 20 MHz |
| Instruction Execution Time | 200 ns |
| Program Memory Type | Flash |
| Program Memory Size | 1.75 KB (1K x 14 words) |
| RAM Size | 64 bytes |
| ADC Resolution | 10 bits |
| ADC Channel Count | 8 channels |
| I/O Pin Count | 12 pins |
| Single-Word Instruction Count | 35 instructions |
| Supply Voltage Range | 4.5 V to 5.5 V |
| Package Type | PDIP-14 |
| Package Pin Count | 14 pins |
| 実装タイプ | Through-hole |
PIC16F676-I/P ピン構成
| ピン 1 | RA0/AN0/C1IN+ — Port A digital input/output, analog input channel 0, or comparator 1 positive input |
| ピン 2 | RA1/AN1/C1IN- — Port A digital input/output, analog input channel 1, or comparator 1 negative input |
| ピン 3 | RA2/AN2/VREF-/CVREF — Port A digital input/output, analog input channel 2, comparator reference, or voltage reference negative connection |
| ピン 4 | RA3/AN3/VREF+/C1OUT — Port A digital input/output, analog input channel 3, positive voltage reference, or comparator output |
| ピン 5 | RA4/T0CKI/C1OUT — Port A digital input/output, Timer 0 clock input, or comparator output |
| ピン 6 | RA5/AN4/C2IN+/OSC1/CLKIN — Port A digital input/output, analog input channel 4, comparator input, or oscillator input |
| ピン 7 | VSS — Ground reference connection |
| ピン 8 | RB0/AN12 — Port B digital input/output or analog input channel 12 |
| ピン 9 | RB1/AN10 — Port B digital input/output or analog input channel 10 |
| ピン 10 | RB2/AN8 — Port B digital input/output or analog input channel 8 |
| ピン 11 | RB3/AN9/PGM/C1IN+ — Port B digital input/output, analog input channel 9, programming mode input, or comparator input |
| ピン 12 | VDD — Positive supply voltage connection |
| ピン 13 | RB4 — Port B digital input/output |
| ピン 14 | RB5/AN11/T0CKI — Port B digital input/output, analog input channel 11, or Timer 0 clock input |
主な用途
PIC16F676-I/P の用途: 6 件s: Compact Analog Sensor Interface, LED Status and Warning Panel, Simple Relay and Actuator Controller, Battery-Powered Instrumentation, Motor Speed and Direction Control, Programmable Logic and Teaching Platform.
Compact Analog Sensor Interface
The PIC16F676-I/P fits analog sensor interfaces because its integrated 10-bit ADC provides eight measurement channels alongside 12 I/O pins and a 20 MHz clock. The device can sample a sensor, apply scaling and threshold logic in firmware, and update indicators without a separate external ADC. Its 4.5 V to 5.5 V operating range also permits direct use with conventional 5 V sensor systems. The engineering trade-off is the limited 1.75 KB Flash and 64-byte RAM, so the application should use concise code, avoid unnecessary buffering, and place ADC-sensitive traces away from switching and oscillator circuitry.
おすすめ
LED Status and Warning Panel
The PIC16F676-I/P is appropriate for LED status and warning panels because 12 I/O pins can drive multiple indicators while the 200 ns instruction execution time provides ample response margin. A programmed state machine can combine pushbuttons, flashing patterns, and fault indicators without requiring a larger controller. Its 1.75 KB Flash is useful for several standalone patterns, although the 64-byte RAM restricts history buffering. The design should use current-limiting resistors, define LED drive current against the device limits, and keep repetitive timing functions away from precision analog inputs.
おすすめ
Simple Relay and Actuator Controller
PIC16F676-I/P can implement a compact relay or actuator controller by using its GPIO pins for switch inputs and discrete output control. The 20 MHz Flash-based core supports debouncing, state sequencing, timing, and safety interlocks, while the integrated 10-bit ADC can monitor a feedback voltage or temperature-related sensor. Designers must keep coil transients away from the MCU and provide suitable driver protection because the controller does not directly replace a power transistor or relay driver. Firmware should include defined startup, fault, and shutdown states rather than relying on uncontrolled pin states.
おすすめ
Battery-Powered Instrumentation
The PIC16F676-I/P is suitable for small battery-powered instruments that need local measurement and simple user interaction without a high-performance processor. Its 64-byte RAM and compact 14-pin package simplify board area, and the 10-bit ADC supports proportional readings from resistive or voltage-based sensors. The 20 MHz clock provides more processing margin than many simple control tasks require, but actual battery life depends on the selected oscillator and firmware duty cycle. Low-power design should use the device's verified sleep or shutdown capabilities and should not assume an unverified low-voltage operating range.
おすすめ
Motor Speed and Direction Control
The PIC16F676-I/P can supervise a small motor-control system where the MCU performs command decoding, timing, interlocks, and speed-reference measurement. Its 10-bit ADC may monitor a command or feedback voltage, while its GPIO and timer resources support pulse and direction outputs. The device should not be assumed to drive a motor directly; external transistor or driver circuitry is required. Current sensing, inductive noise suppression, and deliberate separation between motor return paths and analog inputs are essential. The limited Flash and RAM favor a focused supervisory role rather than a sophisticated motion-control algorithm.
おすすめ
Programmable Logic and Teaching Platform
PIC16F676-I/P works well as a programmable logic or embedded-control teaching platform because it combines a simple 35-instruction set, 20 MHz execution capability, Flash reprogramming, and an integrated ADC in a 14-pin PDIP package. The through-hole package makes the device accessible on a perforated board or educational PCB, and the small memory footprint encourages efficient, readable firmware. Learners can implement timers, digital inputs, PWM-like outputs, and analog threshold functions without a complex development board. Expansion remains limited, so projects requiring large buffers, networking stacks, or high-resolution display interfaces should select a larger microcontroller family.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: PIC16F676-I/P — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | PIC16F676-E/P | PIC16F676A-I/P | PIC16F630-I/P |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | PDIP-14 | PDIP-14 | PDIP-14 | PDIP-14 |
| Device Type | 8-bit Flash microcontroller | 8-bit Flash microcontroller | 8-bit Flash microcontroller | 8-bit Flash microcontroller |
| ADC | 10-bit, 8 channels | 10-bit, 8 channels | 10-bit class | Not included |
主な差別化要因
- Integrated analog conversion in a compact controller （vs PIC16F630-I/P)
- Verified memory capacity for the target design （vs PIC16F676A-I/P)
- Same 14-pin PDIP mechanical interface across the candidate set （vs PIC16F676-E/P)
設計ノート
Use the manufacturer PDIP-14 footprint rather than a generic DIP outline, and confirm lead spacing, row width, drill diameter, and maximum body length against the package drawing. Keep the VDD decoupling capacitor close to pin 12 and connect VSS at pin 7 to a low-impedance ground plane. Because the same physical package can contain mixed analog, digital, programming, oscillator, and power functions, preserve the manufacturer pin-function mapping when making PCB changes.
Separate analog inputs from oscillator and switching traces, return comparator and ADC currents directly to the quiet ground reference, and avoid routing high-current outputs beneath sensitive analog nets. The supplied family documentation identifies VREF-, VREF+, CVREF, comparator, and analog-input functions on Port A, so those pins should not be treated as ordinary GPIO when planning the board. If the internal reference is used, follow the manufacturer conversion-time and settling guidance for the required measurement accuracy.
Do not treat the PIC16F630-I/P as an unconditional substitute for PIC16F676-I/P: the 10-bit ADC is absent, and firmware that references ADC registers cannot be assumed to work. Likewise, changing from -I/P to -E/P or PIC16F676A-I/P requires verification of temperature grade, memory organization, and device configuration. Before substituting any listed alternative, compare the exact datasheet, recompile the firmware, and run timing, ADC, reset, and power-fail tests on the intended hardware.
コンプライアンス情報
The supplied data identifies a lead-free PDIP package in one distributor record, but it does not explicitly state the device's lead-free, halogen-free, RoHS, REACH, or conflict-minerals status. AEC-Q100 is treated as not applicable because the target is an industrial-temperature microcontroller rather than an explicitly automotive-qualified device.
