PIC16F689-I/P - 8-bit MCU, 7KB Flash, 20MHz, 20-DIP | Microchip
MPN: PIC16F689-I/P ✓ Hoạt độngPIC16F689-I/P Tóm tắt
What is an 8-bit PIC microcontroller? An 8-bit PIC microcontroller is a single-chip computer built around a RISC CPU core with 8-bit wide data paths, on-chip flash program memory, RAM, EEPROM, and a rich set of integrated peripherals. In the broader taxonomy, a PIC16F part belongs to the mid-range 8-bit microcontroller family, which sits under the umbrella of microcontrollers (MCU), and in turn under embedded controllers, microcomputer ICs, and ultimately semiconductors. The PIC16F689 specifically targets low-pin-count (20-pin) cost-sensitive embedded designs.
Key features of this device include 18 digital I/O pins, a 12-bit A/D converter with 12 channels, an enhanced USART, an MSSP module supporting SPI and I2C (both Master and Slave), two 8-bit timers and one 16-bit timer, an 8-bit parallel slave port, and an internal voltage reference. A wide 2.0V to 5.5V operating range lets a single design power from a 3.3V or 5V rail. nanoWatt Technology brings idle, sleep, and watchdog-timer based power-saving modes that draw microamp-level currents.
Architecturally, the PIC16F689 uses a 14-bit instruction word with a single accumulator (W) and up to 80 instructions, plus hardware stack and interrupt controller. The on-board ICD (In-Circuit Debugger) and ICSP (In-Circuit Serial Programming) interfaces speed firmware development and field firmware upgrades. The 12-bit ADC and internal comparator make mixed-signal interfacing straightforward for sensor-front-end designs.
Typical applications include consumer appliance controls, low-end remote controls, sensor interfaces, simple motor controllers, battery chargers, lighting ballasts, and educational / hobbyist projects where the 20-DIP form factor supports breadboarding. Designers often pair it with Microchip's free MPLAB X IDE, XC8 compiler, and MPLAB ICD 3 / PICkit 4 debug tools.
When designing with this part, plan the I/O budget carefully: although the chip exposes 18 I/O pins, several are multiplexed with the ICSP, ICD, oscillator, and MCLR functions. Choose an external oscillator or set the INTOSC configuration carefully to free up the OSC1/OSC2 pins for general I/O. Use the built-in EEPROM endurance spec to estimate write-cycle life in data-logging applications.
This page synthesizes distributor pricing, drop-in PIC16F family alternatives, and practical design notes that complement - but do not replace - the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho PIC16F689-I/P — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC16F689-I/P (cùng hình factor và footprint) — khác nhau ở Package, Timers, Architecture, I/O Pins, ADC.
PIC16F690-I/P
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16F685-I/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F688-I/SL
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F684-E/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F59-I/P
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16F628A-I/P
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16F689-I/P Tỷ lệ tối đa & tính chất điện
| Core Architecture | 8-bit PIC16 (mid-range x14) |
| Program Memory Type | Flash |
| Program Memory Size | 7 KB (4K x 14 words) |
| Data RAM | 256 bytes |
| Data EEPROM | 256 bytes |
| Max CPU Frequency | 20 MHz |
| Operating Voltage Range | 2.0 V to 5.5 V |
| Number of I/O Pins | 18 |
| A/D Converter | 12-bit, 12 channels |
| Communication Peripherals | Enhanced USART, MSSP (SPI / I2C Master & Slave) |
| Timers | 2 x 8-bit, 1 x 16-bit |
| Hộp | 20-pin PDIP (300 mil) |
| Kiểu lắp đặt | Through-Hole |
| Khoảng nhiệt độ hoạt động | -40 C to +85 C (industrial, 'I' suffix) |
| Low-Power Feature | nanoWatt Technology |
| Programming / Debug | ICSP, ICD |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC16F689-I/P
| Chân 1 | VDD — Positive supply voltage (2.0 V to 5.5 V) |
| Chân 2 | RA5/T1CKI/OSC1/CLKIN — RA5 I/O / Timer1 clock / OSC1 / external clock in |
| Chân 3 | RA4/T1G/OSC2/CLKOUT — RA4 I/O / Timer1 gate / OSC2 / CLKOUT |
| Chân 4 | MCLR/VPP/RA3 — Master clear reset (active low) / programming voltage / RA3 I/O |
| Chân 5 | VSS — Ground reference |
| Chân 6 | RC0 — PORTC I/O bit 0 |
| Chân 7 | RC1 — PORTC I/O bit 1 |
| Chân 8 | RC2 — PORTC I/O bit 2 |
| Chân 9 | RC3 — PORTC I/O bit 3 |
| Chân 10 | RC4 — PORTC I/O bit 4 |
| Chân 11 | RC5 — PORTC I/O bit 5 |
| Chân 12 | RC6/TX/CK — PORTC I/O bit 6 / USART TX / I2C clock |
| Chân 13 | RC7/RX/DT — PORTC I/O bit 7 / USART RX / I2C data |
| Chân 14 | RB7/ICSPDAT — PORTB I/O bit 7 / ICSP data |
| Chân 15 | RB6/ICSPCLK — PORTB I/O bit 6 / ICSP clock |
| Chân 16 | RB5 — PORTB I/O bit 5 |
| Chân 17 | RB4 — PORTB I/O bit 4 |
| Chân 18 | RB3/PGM — PORTB I/O bit 3 / LVP programming |
| Chân 19 | RB2 — PORTB I/O bit 2 |
| Chân 20 | RB1 — PORTB I/O bit 1 |
Ứng dụng tiêu biểu
PIC16F689-I/P phù hợp cho 6 Áp dụngs: Consumer Appliance Control, Sensor Interface Module, Lighting Ballast and LED Driver Control, Battery Charger and Power Bank Controller, Hobbyist and Educational Boards, Low-End Remote Control Transmitter.
Consumer Appliance Control
Why the PIC16F689-I/P fits consumer appliance control: 18 I/O pins, 7 KB flash, and a wide 2.0-5.5 V operating range cover washing-machine user-interface boards, microwave key panels, and HVAC thermostat logic where the 20-pin PDIP is still preferred for hand-prototyping and quick rework. The 12-bit ADC with 12 channels reads NTC thermistors, humidity sensors, and rotary encoder wiper voltages to within 1 mV resolution. Compared to migrating to a 32-bit ARM MCU for simple on/off relays and triac drive, this part keeps BOM cost near $2 in 1k volumes and powers directly from a 3.3 V LDO. Use the enhanced USART to talk to a Bluetooth or Wi-Fi module when the appliance needs app connectivity.
Được đề xuất
Sensor Interface Module
Why the PIC16F689-I/P fits sensor interface modules: the 12-bit ADC with 12 channels and dual comparators let one chip read four 4-20 mA analog sensors, two digital switches, and a SPI temperature sensor. The 256-byte EEPROM with 1M-cycle endurance is well-suited to logging calibration constants, sensor IDs, and runtime hours. The MSSP supports both I2C and SPI, so a digital pressure sensor over SPI plus an I2C OLED display share the same MCU. nanoWatt sleep modes hold total current below 5 microamps for solar/battery installations, which is critical for remote sensor pods. PCB designers can lay out the 20-pin PDIP on a 0.1-inch pitch breadboard during early prototyping.
Được đề xuất
Lighting Ballast and LED Driver Control
Why the PIC16F689-I/P fits lighting ballast and LED control: the 20 MHz CPU and enhanced PWM-driven timers provide the resolution needed for dimming fluorescent ballasts, RGB LED strings, and 0-10 V analog dimming. The 2.0-5.5 V supply range lets the MCU run directly from an AC/DC cap-dropper stage, eliminating a dedicated LDO and shrinking BOM count. Up to 18 I/O drive MOSFET gate drivers, key matrix scanning, and the USART for DMX512 or DALI bridges. Compared with higher-pin-count PICs, the F689 saves PCB area while keeping nanoWatt low-power idle for emergency-lighting standby modes.
Được đề xuất
Battery Charger and Power Bank Controller
Why the PIC16F689-I/P fits battery charger / power-bank controllers: the 12-bit ADC monitors battery voltage, charge current, and NTC temperature with 1 mV resolution, while the dual analog comparators detect over-current and over-voltage conditions without CPU intervention. 256 bytes of EEPROM persist charge-cycle counters, capacity calibration, and fault logs through power cycles. The nanoWatt Technology idle mode draws under 1 microamp, extending standby time on lithium-ion power banks between uses. The 20-pin PDIP remains a service-friendly form factor for replacement electronics and warranty repair shops.
Được đề xuất
Hobbyist and Educational Boards
Why the PIC16F689-I/P fits hobbyist and educational boards: the 20-pin PDIP through-hole footprint works in breadboards and solder-less kits without SMD rework. ICSP via PGD/PGC allows in-circuit programming using a $25 PICkit 4 without desoldering the chip. The 7 KB flash holds substantial demo projects, from PWM motor drives to I2C sensor readers, supported by MPLAB X IDE and the free XC8 compiler. The 20 MHz instruction budget exercises all four arithmetic flags plus the 14-bit instruction set, making it a canonical teaching vehicle for the PIC16F mid-range family.
Được đề xuất
Low-End Remote Control Transmitter
Why the PIC16F689-I/P fits low-end remote-control transmitters: nanoWatt Technology reduces sleep current below 1 microamp, so a coin cell can power a key-fob or wall-mount remote for several years. The 18 I/O lines scan a 4x4 key matrix with interrupt-on-change wake-up, while the USART or MSSP drives an RF transceiver IC over SPI at low duty cycle. The 2.0-5.5 V supply range works directly from a CR2032 cell without boost or buck conversion. Compared to a smaller PIC10F, the F689 has enough flash and RAM to host structured rolling-code firmware for entry-level secure RF links.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16F689-I/P — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | PIC16F690-I/P | PIC16F685-I/P | PIC16F688-I/SL | PIC16F684-E/P |
|---|---|---|---|---|---|
| Package | 20-pin PDIP (300 mil) | 20-pin PDIP | 20-pin PDIP | 20-pin SOIC | 20-pin PDIP |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 7 KB | 8 KB | 7 KB | 7 KB | 4 KB |
| Data RAM | 256 B | 384 B | 256 B | 256 B | 128 B |
| Data EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B |
| Max CPU Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| ADC Channels (12-bit) | 12 | 12 | 8 | 7 | 8 |
| I/O Pins | 18 | 19 | 17 | 18 | 17 |
| Operating Voltage | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V |
Bảo phân biệt quan trọng
- Highest ADC channel count in this 20-pin PDIP family (vsPIC16F685-I/P)
- Larger flash than the cost-down PIC16F684 (vsPIC16F684-E/P)
- Through-hole PDIP form factor for service-friendly builds (vsPIC16F688-I/SL)
- Industrial -40 C to +85 C grade (vsGeneric PIC16F family)
Ghi chú thiết kế
Estimated: At 20 MHz and VDD=5 V the PIC16F689-I/P typically draws 5-8 mA active and under 1 microamp in nanoWatt sleep. Bulk-decouple VDD with a 100 nF ceramic placed within 5 mm of pin 1 and an additional 10 uF tantalum at the regulator output to suppress switching transients. For battery operation, use Sleep + Watchdog Timer wake-up rather than idle loops; this typically cuts average current by 10-100x.
Place a 100 nF decoupling capacitor directly across pins 1 (VDD) and 5 (VSS), plus a second 100 nF across pins 20 (RB1, internally tied to VDD via digital core) and 19 (RB2, near VSS) if the layout places RB1/RB2 far from VDD/VSS. Reserve a footprint for an MCLR pull-up to VDD (typically 10 kohm) on pin 4. Route the ICSP connector (PGD on RB7, PGC on RB6) away from switching nodes to avoid programming glitches.
Three common pitfalls: (1) Forgetting that the 'I' suffix means -40 C to +85 C industrial range, not extended -40 C to +125 C - use 'E' suffix for that. (2) Enabling low-voltage ICSP (LVP) on RB3/PGM but then forgetting that the pin is no longer available as a general I/O - either route the LVP line to a dedicated header or disable LVP in configuration bits. (3) Configuring MCLR as a regular input instead of reset - MCLR must be tied high through a 10 kohm resistor for normal operation.
For analog-accurate ADC readings, route the analog signals (AN0-AN11, typically shared with PORTA and PORTE pins) on a separate analog ground island connected to the main ground at a single point near the VDD decoupling capacitor. Add a ferrite bead or small resistor in series with AVDD if available. Keep the analog traces away from digital switching lines and clock signals to preserve the 12-bit ADC's signal-to-noise ratio.
Thông tin tuân thủ
RoHS compliant per Microchip product page. Industrial -40 C to +85 C temperature range with 'I' suffix. Lead-free matte-tin finish. Not AEC-Q100 qualified - choose PIC16F690-I/P automotive variants if needed.
