PIC16F690-I/P - 8-bit 20MHz 7KB Flash MCU 20-PDIP | Microchip
MPN: PIC16F690-I/P ✓ Hoạt độngPIC16F690-I/P Tóm tắt
An 8-bit microcontroller (often called an MCU) is a single-chip computer that integrates a CPU, RAM, non-volatile program memory, and peripheral blocks such as timers, ADC, and communication interfaces on one die. Within the broader taxonomy, the PIC16F690 belongs to the mid-range 8-bit MCU category (8-bit -> microcontrollers -> microcomputer -> embedded processor -> semiconductor IC). It is engineered for low-pin-count, cost-sensitive embedded designs where deterministic real-time response, ease of programming, and long-term product lifecycle matter more than raw compute throughput.
Key features that differentiate this device include its nanoWatt technology for sub-microamp sleep currents (suitable for battery-powered sensors), the on-chip EEPROM data memory (eliminating an external memory chip), a wide 2.0 V to 5.5 V operating voltage range that supports both 3.3 V and 5 V system rails, and an internal oscillator that can remove the need for an external crystal. The integrated Enhanced Universal Synchronous Asynchronous Receiver Transmitter (EUSART), MSSP (I2C/SPI), and 10-bit ADC with internal voltage reference provide substantial subsystem integration for sensor and communication nodes.
The PIC16F690 uses a 14-bit wide instruction word and a RISC-style 35-instruction core, allowing most instructions to execute in one instruction cycle (200 ns at 20 MHz). It supports in-circuit serial programming (ICSP) and in-circuit debugging (ICD) via dedicated PG/RB6 and PGC/RB7 pins, allowing firmware updates and debug without removing the part from the board. Hardware multiplier and Brown-Out Reset (BOR) are integrated.
Typical applications include home appliances and white goods, battery-powered sensor nodes, automotive interior accessories (after-market), industrial control and monitoring, LED driving and lighting control, and consumer remote controls. The wide voltage range, internal oscillator, and rich communication peripherals allow a single MCU to handle sensing, communication, and actuator control in compact designs.
When designing with this part, place decoupling capacitors (typically 100 nF plus a 1 uF bulk) close to VDD/VSS pairs, keep crystal traces short and symmetric if an external resonator is used, and reserve MCLR as an external reset only if in-circuit debugging is required. The wide 2.0-5.5 V range simplifies battery and USB-powered designs but verify the ADC reference and PGA gains for the chosen supply rail.
This page synthesizes distributor pricing, drop-in replacement alternatives, parametric comparisons, and practical design guidance not found in the manufacturer datasheet alone, helping engineers shorten the BOM, sourcing, and bring-up cycle.
Bộ thay thế dễ dàng lắp đặt cho PIC16F690-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 PIC16F690-I/P (cùng hình factor và footprint) — khác nhau ở Package, Timers, ADC, Operating Temperature, I/O Pins.
PIC16F690-E/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F690-I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F689-I/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F688-I/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F677-I/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F685-I/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F628A-I/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F690-I/P Tỷ lệ tối đa & tính chất điện
| Core | PIC16 mid-range 8-bit (14-bit instruction) |
| Architecture | RISC (35 single-word instructions) |
| Tần số xung maksimum | 20 MHz |
| Instruction Execution Time | 200 ns (1 cycle at 20 MHz) |
| Program Memory (Flash) | 7 KB (4K x 14 words) |
| RAM | 256 bytes |
| EEPROM Data Memory | 256 bytes |
| I/O Pins | 18 |
| ADC | 10-bit, up to 12 channels |
| Comparators | 2 |
| PWM/CCP | 1 CCP + 1 ECCP module |
| Communication | EUSART, MSSP (I2C/SPI) |
| Power-Saving Mode | nanoWatt technology |
| Hộp | 20-pin PDIP (0.300 in) |
| Kiểu lắp đặt | Through-Hole |
| Nhiệt độ hoạt động | -40C to +85C (industrial, 'I' suffix) |
| In-Circuit Programming/Debug | ICSP via MCLR/PG/RB6/PGC |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC16F690-I/P
| Chân 1 | VDD — Positive supply voltage (2.0 V to 5.5 V) |
| Chân 2 | RA5/T1CKI/SS/HLVDIN/C1OUT — Digital I/O / Timer1 clock input / SSP select / HLVD input / Comparator 1 output |
| Chân 3 | RA4/AN3/T1G/OSC2/CLKOUT — Digital I/O / ADC input / Timer1 gate / crystal output / Fosc/4 output |
| Chân 4 | RA3/MCLR/VPP — Digital I/O / Master Clear reset (active low) / programming voltage |
| Chân 5 | RA2/AN2/T0CKI/INT/COUT — Digital I/O / ADC input / Timer0 clock / external interrupt / comparator output |
| Chân 6 | RA1/AN1/C1IN-/ICSPCLK — Digital I/O / ADC input / comparator 1 inverting input / ICD clock |
| Chân 7 | RA0/AN0/C1IN+/ICSPDAT/ULPWU — Digital I/O / ADC input / comparator 1 non-inverting input / ICD data / ultra-low-power wake-up |
| Chân 8 | VSS — Ground reference |
| Chân 9 | RA7/OSC1/CLKI — Digital I/O / crystal input / external clock input |
| Chân 10 | RA6/OSC2/CLKO — Digital I/O / crystal output / clock output |
| Chân 11 | RC0/AN4/P1D — Digital I/O / ADC input / PWM1 output D |
| Chân 12 | RC1/AN5/P1C — Digital I/O / ADC input / PWM1 output C |
| Chân 13 | RC2/AN6/P1B — Digital I/O / ADC input / PWM1 output B |
| Chân 14 | RC3/AN7/P1A/SS — Digital I/O / ADC input / PWM1 output A / SSP slave select |
| Chân 15 | RC4/AN8/C2OUT/SDI/SDA — Digital I/O / ADC input / comparator 2 output / SPI data in / I2C data |
| Chân 16 | RC5/AN9/SDO — Digital I/O / ADC input / SPI data out |
| Chân 17 | RC6/AN10/SS/TX/CK — Digital I/O / ADC input / SSP select / USART transmit / USART clock |
| Chân 18 | RC7/AN11/RX/DT — Digital I/O / ADC input / USART receive / USART data |
| Chân 19 | VSS — Ground reference |
| Chân 20 | VDD — Positive supply voltage (2.0 V to 5.5 V) |
Ứng dụng tiêu biểu
PIC16F690-I/P phù hợp cho 6 Áp dụngs: Battery-Powered Sensor Nodes, Home Appliance Control (White Goods), LED Lighting and Dimming Controllers, Automotive Aftermarket Accessories, Industrial Control and Monitoring, Consumer Remote Controls and IR/RF Nodes.
Battery-Powered Sensor Nodes
The PIC16F690-I/P's nanoWatt technology and 2.0-5.5 V operating range make it ideal for battery-powered sensor nodes such as remote thermostats, smoke detectors, and irrigation sensors. Its 256 B EEPROM logs calibration data and last-known state across power cycles, while the 10-bit ADC handles up to 12 channels of analog sensor inputs (temperature, light, soil moisture). In a typical 2x AA battery design, sleep current in the nanoWatt mode is sub-microamp, extending multi-year battery life. Compared with switching regulators, the on-chip peripherals draw no switching noise; the integrated comparators and ADC handle thresholds and measurements without external op-amps. Companion components include low-quiescent LDO TPS7A02 for power conditioning and the MCP9700 analog temperature sensor for thermal inputs.
Được đề xuất
Home Appliance Control (White Goods)
The PIC16F690-I/P is widely used in washing machines, dishwashers, refrigerators, microwave ovens, and rice cookers for keypad input, LED/LCD display driving, relay and triac actuation, and serial communication to other modules. Its 20 MHz core gives 200 ns instruction execution, fast enough for closed-loop temperature and motor-control algorithms. The ECCP module generates complementary PWM with programmable dead time, ideal for driving H-bridges and triac phases without external gate-driver chips. Eighteen I/O pins interface easily with 7-segment displays, keypads, and a sensor suite including NTC thermistors and water-level probes. Industrial -40C to +85C temperature range tolerates the high ambient of motor-compressor compartments. Companion parts include ULN2003 for relay driving and MCP1700 for 3.3 V power regulation.
Được đề xuất
LED Lighting and Dimming Controllers
The PIC16F690-I/P's ECCP module, internal comparator, and 10-bit ADC support cost-effective LED drivers for dimmable bulbs, downlights, and architectural lighting. The ECCP generates PWM at up to 20 kHz with 10-bit resolution, above the audible band and with smooth dimming across 1000:1 dynamic range. The wide 2.0-5.5 V VDD accepts a rectified mains tap or a low-cost capacitive-drop supply. Internal comparators can implement zero-cross detection for triac dimmer emulation. Eighteen I/O pins connect to a rotary encoder or capacitive touch pad, while EUSART or MSSP enables DALI/0-10 V bridge or wireless control via an external module. Companion parts include the MCP16502 for efficient LED string and the system use of PIC16F677-I/P for smaller lighting nodes.
Được đề xuất
Automotive Aftermarket Accessories
In automotive aftermarket accessories (interior lighting, alarm LED blinkers, tire-pressure display dongles), the PIC16F690-I/P provides the I/O count, ADC, and PWM needed in a single chip. Its industrial -40C to +85C grade tolerates cabin temperatures; for underhood applications use the PIC16F690-E/P extended -40C to +125C variant. The 20 MHz CPU performs CAN-bit-banging if the application does not require a dedicated CAN controller. On-chip EEPROM stores user settings and VIN-derived trim values across battery-disconnect events. Pair the MCU with the MCP2515 stand-alone CAN controller when full ISO 11898 compliance is needed, or use the MCP1700 for 5 V LDO from the 12 V battery.
Được đề xuất
Industrial Control and Monitoring
The PIC16F690-I/P is a strong fit for industrial control and monitoring: PLC-style digital I/O blocks, machine-status displays, simple SCADA remote terminals, and conveyor/sorter logic. The wide 2.0-5.5 V supply tolerates 24 V industrial rails after a TPS7A02 LDO step-down, while 7 KB Flash hosts real-time control tables and serial-protocol state machines. The EUSART supports RS-232/RS-485 via an external transceiver (MAX485), and the MSSP drives SPI sensors such as the MCP3201 ADC for high-precision analog input alongside the internal 10-bit ADC. Industrial -40C to +85C rating covers most cabinet environments. Companion parts include MAX485 for RS-485 and ISO1540 for I2C isolation.
Được đề xuất
Consumer Remote Controls and IR/RF Nodes
Consumer remote controls and IR/RF transceivers use the PIC16F690-I/P for keypad scanning, IR transmit/receive, and RF link handling. The 20 MHz core times carrier bursts precisely while the on-chip comparators decode 38 kHz IR sub-carrier amplitude-modulated signals without an external op-amp. NanoWatt sleep reduces standby current to sub-microamp, extending the AAA-cell battery life to multi-year horizons. The internal 8 MHz oscillator removes the external crystal and lets the MCU wake quickly via watchdog timer or external interrupt on RB0/INT. The 256 B EEPROM holds the last-channel memory. Companion parts include the TSOP38238 IR receiver and CC1101 sub-GHz RF transceiver for wireless links.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16F690-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-E/P | PIC16F689-I/P | PIC16F688-I/P | PIC16F677-I/P | PIC16F685-I/P | PIC16F628A-I/P |
|---|---|---|---|---|---|---|---|
| Package | 20-pin PDIP | 20-pin PDIP | 20-pin PDIP | 20-pin PDIP | 20-pin PDIP | 20-pin PDIP | 20-pin PDIP |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Flash | 7 KB | 7 KB | 7 KB | 7 KB | 7 KB | 7 KB | 3.5 KB |
| RAM | 256 B | 256 B | 256 B | 256 B | 256 B | 256 B | 224 B |
| Maximum Clock | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| ECCP Module | Yes | Yes | No | No | Yes | Yes | Yes (CCP only) |
| ADC Channels | 12 | 12 | 8 | 8 | 8 | 8 | 0 (no ADC) |
| Operating Voltage | 2.0-5.5 V | 2.0-5.5 V | 2.0-5.5 V | 2.0-5.5 V | 2.0-5.5 V | 2.0-5.5 V | 3.0-5.5 V |
| Temperature Grade | -40C to +85C (I) | -40C to +125C (E) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) |
Bảo phân biệt quan trọng
- Largest Flash memory in the 20-pin mid-range PIC16F lineup (vsPIC16F628A-I/P)
- Enhanced CCP (ECCP) with complementary PWM and programmable dead time (vsPIC16F689-I/P / PIC16F688-I/P)
- 12-channel 10-bit ADC versus 8 channels on most 20-pin siblings (vsPIC16F685-I/P / PIC16F688-I/P)
- nanoWatt technology with sub-microamp sleep current (vsPIC16F628A-I/P)
Ghi chú thiết kế
Place a 100 nF decoupling capacitor within 5 mm of each VDD/VSS pin pair and add a 1 uF to 10 uF bulk capacitor at the regulator output to handle digital switching transients. The PIC16F690-I/P draws average IDD in the low-mA range during active 20 MHz operation; sleep current in nanoWatt mode drops to sub-microamp. Tie MCLR high through a 10 kohm resistor for normal operation, or leave it as a programming/debug pin if in-circuit debugging is required.
Keep the crystal or resonator traces (when using external OSC) short, symmetric, and guarded with a ground trace to minimize stray capacitance and EMI pickup. Route the ICSP/ICD lines (PG/RB6 and PGC/RB7) with no series resistors to support Microchip programmers; add ESD protection such as PESD5V0L4UG on signal lines exposed to user touch panels. For mixed-signal designs, separate analog ADC traces from switching PWM traces to avoid digital noise coupling.
Do not assume that any 20-pin PIC16F pin-to-pin replacement is firmware-compatible. PIC16F690 has more ADC channels (12 vs 8) and an ECCP module that PIC16F689/PIC16F688 lack - referencing unmapped registers causes silent peripheral malfunction. Confirm the device ID at startup if your firmware could ship on multiple SKUs. Note that PIC16F628A lacks an ADC entirely; downgrading to PIC16F628A breaks any analog sensing code. Always compile firmware for the exact target device and verify in the CONFIG register that the oscillator, watchdog, brown-out, and code-protection bits match your design intent.
Estimated: at active 20 MHz and full I/O load, the PIC16F690-I/P core dissipation is well below 100 mW; no heatsink is required. With VDD = 5.5 V and IDD around 5-8 mA active, junction temperature rise above ambient is roughly 2-3 C using the standard JEDEC DIP-20 thermal resistance (about 60 C/W on a 4-layer board). For sealed enclosures with limited convection, derate ambient temperature by 10 C to maintain reliability headroom.
Thông tin tuân thủ
Microchip PIC16F690 family is RoHS compliant per the product page. Industrial -40C to +85C temperature grade only; the -E variant provides -40C to +125C extended temperature. AEC-Q100 qualification is not standard on the PIC16F690; Microchip offers AEC-Q100-qualified automotive PIC16F variants separately.
