PIC16F87-I/SS - 8-Bit 20MHz 7KB Flash MCU | Microchip
MPN: PIC16F87-I/SS ✓ Hoạt độngPIC16F87-I/SS Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (Flash, RAM, EEPROM), and programmable peripherals on one die. The PIC16F87 belongs to the PIC16 mid-range architecture, which sits between PIC10/12 baseline and PIC18 enhanced families. Mid-range MCUs balance code density, peripheral integration, and low power consumption, making them ideal for embedded control tasks in appliance, automotive, and industrial applications where 8-bit processing is sufficient and cost is critical.
Key features include 256 bytes of EEPROM data memory, an 8 MHz internal oscillator, a Capture/Compare/PWM (CCP) module, an Addressable USART, two analog comparators, and a 10-bit ADC reference (referenced from the same datasheet family). nanoWatt Technology provides multiple power-saving modes including Sleep, Idle, and peripheral disable control. The PIC16F87 is code-compatible with the PIC16C7x, PIC16C62xA, PIC16C5X, and PIC12Cxxx families, simplifying migration for legacy designs.
Typical applications span automotive body controllers, industrial sensor interfaces, white-goods and appliance controls, consumer electronics with USART communication, and battery-backed low-power devices leveraging nanoWatt modes. The wide 4.0-5.5V supply range also supports regulated 5V industrial rails.
When designing with the PIC16F87-I/SS, ensure your ICD/ICSP programming interface (PGC/PGD) is accessible on the board and that VDD decoupling (100 nF + 10 uF) is placed within 5 mm of the supply pins. The -I industrial temperature grade supports -40C to +85C operation; use the -E grade (-40C to +125C) for harsh-environment deployments.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet. Cross-reference data is sourced from Microchip's official competitor cross-reference tool and verified distributor listings.
Bộ thay thế dễ dàng lắp đặt cho PIC16F87-I/SS — 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 PIC16F87-I/SS (cùng hình factor và footprint) — khác nhau ở Package, Internal Oscillator, ADC, Operating Temperature, Program Memory (Flash).
PIC16F87-I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F87-I/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F87-I/ML
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F88-I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F819-I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F870-I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F87-I/SS Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC16 mid-range 8-bit RISC |
| Program Memory (Flash) | 7 KB (4K x 14 words) |
| RAM | 368 bytes |
| EEPROM | 256 bytes |
| Instruction Set | 35 single-word instructions |
| Tần số xung maksimum | 20 MHz (200 ns instruction cycle) |
| Supply Voltage (VDD) | 4.0 V to 5.5 V |
| I/O Pins | 16 |
| Internal Oscillator | 8 MHz |
| Operating Temperature (Industrial -I) | -40 C to +85 C |
| Hộp | 20-pin SSOP (5.30 mm body, 0.65 mm pitch) |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | 1 (unlimited floor life at <=30 C/85% RH) |
| Trạng thái RoHS | Compliant |
| Lead-Free (Pb-Free) | Yes |
Cấu hình chân PIC16F87-I/SS
| Chân 1 | MCLR/VPP/RA5 — Master Clear (reset) input / Programming voltage / Port A bit 5 |
| Chân 2 | RA0/AN0 — Port A bit 0 / Analog input 0 |
| Chân 3 | RA1/AN1 — Port A bit 1 / Analog input 1 |
| Chân 4 | RA2/AN2/CVREF — Port A bit 2 / Analog input 2 / Comparator voltage reference |
| Chân 5 | RA3/AN3/C1OUT — Port A bit 3 / Analog input 3 / Comparator 1 output |
| Chân 6 | RA4/T0CKI/C2OUT — Port A bit 4 / Timer 0 clock input / Comparator 2 output |
| Chân 7 | RA5/SS/AN4 — Port A bit 5 / SPI slave select / Analog input 4 |
| Chân 8 | OSC2/CLKOUT — Oscillator crystal output / Clock output |
| Chân 9 | OSC1/CLKIN — Oscillator crystal input / External clock input |
| Chân 10 | RC0/T1OSO/T1CKI — Port C bit 0 / Timer 1 oscillator output / Timer 1 clock input |
| Chân 11 | RC1/T1OSI/CCP2 — Port C bit 1 / Timer 1 oscillator input / Capture/Compare/PWM 2 |
| Chân 12 | RC2/CCP1 — Port C bit 2 / Capture/Compare/PWM 1 |
| Chân 13 | RC3/SCK/SCL — Port C bit 3 / SPI clock / I2C clock |
| Chân 14 | RC4/SDI/SDA — Port C bit 4 / SPI data in / I2C data |
| Chân 15 | RC5/SDO — Port C bit 5 / SPI data out |
| Chân 16 | RC6/TX/CK — Port C bit 6 / USART transmit / USART clock |
| Chân 17 | RC7/RX/DT — Port C bit 7 / USART receive / USART data |
| Chân 18 | RB0/INT — Port B bit 0 / External interrupt |
| Chân 19 | VSS — Ground reference |
| Chân 20 | VDD — Positive supply voltage (4.0V to 5.5V) |
Ứng dụng tiêu biểu
PIC16F87-I/SS phù hợp cho 6 Áp dụngs: White Goods & Appliance Control, Industrial Sensor Interface & Monitoring, Automotive Body Electronics, Consumer Electronics & Remote Controls, HVAC Control & Building Automation, Low-Power Battery-Backed Devices.
White Goods & Appliance Control
The PIC16F87-I/SS is a strong fit for white-goods appliance control boards (washing machines, dishwashers, refrigerators) where its 7 KB Flash holds the main control loop, 368 RAM handles transient buffers, and 256 EEPROM stores calibration and user setting persistence. With 16 I/O pins the MCU can directly drive relay drivers, multiplex keypads, and read temperature sensors through the integrated comparator. The -40C to +85C industrial temperature grade covers laundry-room and kitchen thermal environments without derating. Power-budgeted appliance cycles benefit from nanoWatt Technology Sleep and Idle modes, dropping quiescent draw during standby to single-digit microamps while preserving peripheral interrupts.
Được đề xuất
Industrial Sensor Interface & Monitoring
Industrial sensor interface modules benefit from the PIC16F87-I/SS's USART for RS-232/RS-485 communication, CCP module for timing/capture operations, and two on-chip comparators for analog threshold detection. The 7 KB Flash holds sensor linearization tables and MODBUS ASCII/RTU frame handlers, while the 256-byte EEPROM stores sensor calibration coefficients that survive power cycles. The 20 MHz / 5 MIPS throughput is sufficient for sub-100 ms sensor sampling loops on 8-16 channels using a multiplexer. Wide 4.0-5.5V supply tolerance accommodates noisy 24V industrial rails after a front-end regulator. Programmable brown-out reset prevents corrupted writes during brown-out events common in factory-floor wiring.
Được đề xuất
Automotive Body Electronics
Automotive body and interior modules (window lifters, mirror controllers, seat adjusters, HVAC flap actuators) run well on the PIC16F87-I/SS, where its 8-bit processing power, USART for LIN-bus communication via external transceiver, and CCP for PWM-driven motor control are sufficient. The 256-byte EEPROM preserves last-user settings after battery disconnect, while 16 I/O drive H-bridges and read Hall sensors. The wide 4.0-5.5V supply accommodates 12V vehicle bus transients when paired with a TVS diode and bulk capacitor. Designers targeting AEC-Q100 qualified parts should evaluate PIC16F87T variants or step up to PIC18K-series for underhood applications.
Được đề xuất
Consumer Electronics & Remote Controls
The PIC16F87-I/SS fits consumer remote controls, IR/RF transceivers, smart-plug controllers, and small display controllers where 7 KB Flash holds protocol stacks (NEC RC5, custom proprietary) and 368 RAM buffers incoming frames. The 8 MHz internal oscillator eliminates the external crystal on space-constrained PCBs, while the USART interfaces with Bluetooth or sub-GHz radio modules for wireless remote designs. nanoWatt Technology Sleep mode drops quiescent current below 1 uA, extending coin-cell battery life in handheld units. The compact 20-pin SSOP package keeps the BOM area under 50 mm² including passives.
Được đề xuất
HVAC Control & Building Automation
Building automation subsystems - HVAC zone controllers, smart thermostats, occupancy sensors, damper actuators - leverage the PIC16F87-I/SS's CCP for PWM valve/motor control, two comparators for thermistor or humidity sensor signal conditioning, and USART for BACnet MS-TP or Modbus RTU backhaul. The 256-byte EEPROM stores schedule profiles, setpoint histories, and commissioning parameters that persist across power cycles. The -40C to +85C industrial temperature grade handles unconditioned mechanical-room environments. nanoWatt Sleep with peripheral interrupt enables battery-backed wireless sensor nodes that sleep for years on a single lithium cell.
Được đề xuất
Low-Power Battery-Backed Devices
Battery-backed devices - data loggers, remote telemetry units, wireless sensor nodes, security sensors - benefit from the PIC16F87-I/SS's nanoWatt Technology feature set including Sleep mode (sub-1 uA typical), peripheral disable control, and oscillator fail detection. The 256-byte EEPROM stores hourly/daily data samples without external NVRAM, while the integrated 8 MHz oscillator eliminates standby current from external crystal drive circuits. The wide 4.0-5.5V supply supports direct 3x AA battery packs or single-cell Li-ion with regulator. The 5 MIPS throughput enables synchronous wake-process-sleep duty cycles under 1% active time for multi-year battery life on 2000 mAh cells.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16F87-I/SS — 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 | PIC16F87-I/SO | PIC16F88-I/SS | PIC16F819-I/SS | PIC16F870-I/SS |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-pin SSOP | 20-pin SOIC | 20-pin SSOP - same | 20-pin SSOP - same | 20-pin SSOP - same |
| Program Memory (Flash) | 7 KB | 7 KB | 7 KB | 3.5 KB (-50%) | 3.5 KB (-50%) |
| RAM | 368 bytes | 368 bytes | 368 bytes | 256 bytes (-30%) | 128 bytes (-65%) |
| EEPROM | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 64 bytes (-75%) |
| Maximum Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| ADC Module | External reference | External reference | 8-channel 10-bit ADC (added) | 5-channel 10-bit ADC | 5-channel 10-bit ADC |
| Operating Voltage Range | 4.0V to 5.5V | 4.0V to 5.5V | 2.0V to 5.5V (LF88 variant) | 2.0V to 5.5V | 2.2V to 5.5V |
| Automotive Grade | No (-I industrial) | No (-I industrial) | No (-I industrial) | No | No |
Bảo phân biệt quan trọng
- Direct drop-in compatibility with PIC16F88-I/SS for feature superset upgrade (vsPIC16F88-I/SS)
- Higher Flash density than entry-level PIC16F870/PIC16F819 in same SSOP footprint (vsPIC16F870-I/SS)
- Larger EEPROM for parameter persistence than PIC16F870 (vsPIC16F870-I/SS)
- Same silicon as PIC16F87-I/SO and PIC16F87-I/ML with package options (vsPIC16F87-I/SO)
Ghi chú thiết kế
Estimated: Decoupling VDD with a 100 nF ceramic capacitor within 5 mm of pin 20 and a bulk 10 uF tantalum or aluminum polymer capacitor at the PCB power entry reduces switching noise from CCP PWM and USART transitions. Place a ferrite bead on VDD if the supply rail is shared with motors or relays. nanoWatt Technology Sleep mode requires the brown-out detector to remain enabled only if external VDD transients exceed 4V minimum threshold - per Microchip datasheet 30292D section 11.
Estimated: Keep the MCLR/VPP pin (pin 1) trace short and routed away from PWM-driven signals. Place ICSP programming connector with dedicated PGC (RB6) and PGD (RB7) access pads so production programming does not require a populated header. For the 20-pin SSOP, route all I/O traces on a single signal layer where possible; the SSOP 0.65 mm pitch accepts 0.15 mm trace/space rules with no fanout problems. Add a ground guard ring around the oscillator crystal pins 8-9 to reduce EMI.
Estimated: The PIC16F87-I/SS is rated 4.0V-5.5V only - attempting 3.3V operation will fail Flash programming and EEPROM writes. For 3.3V designs, use the PIC16LF87 variant. The configuration word (CONFIG) must be set before code execution; unprogrammed parts default to RC oscillator mode. Pin RA4 is open-drain output only - it cannot source current. When using the internal 8 MHz oscillator, the OSCCAL register value loaded at programming time determines frequency accuracy; do not overwrite it without recalibrating.
Estimated: For long USART cable runs (>3 m) or noisy industrial environments, place a 100 ohm series resistor at the TX line (RC6) close to the MCU to damp reflections. The CCP1 PWM output on RC2 (pin 12) carries high-frequency content; route this trace away from analog comparator inputs (RA0-RA3) by at least 3 mm to avoid coupled noise. When using the comparator for analog thresholding, add 1-10 ns RC filter on the input to suppress HF switching noise from digital outputs.
Thông tin tuân thủ
RoHS and lead-free per Microchip product page. Industrial -I temperature grade (-40C to +85C) is not AEC-Q100 qualified; for automotive applications use AEC-Q100-qualified parts from the PIC16F1xxx family or PIC18K-series.
