PIC16F87-E/ML - 8-bit MCU, 20MHz, 7KB Flash 28-QFN | Microchip
MPN: PIC16F87-E/ML ✓ Hoạt độngPIC16F87-E/ML Tóm tắt
A microcontroller (MCU) is a single-chip computer containing a CPU, program and data memory, and programmable I/O peripherals. PIC16F87 sits in the mid-range 8-bit PIC16 family — a one-tier-up taxonomy step from baseline PIC10/PIC12/PIC16 devices to PIC18 and PIC32 32-bit devices, all broadly classified as microcontrollers → embedded processors → semiconductors. The 16F family is the original RISC-based Flash MCU family from Microchip and remains one of the largest 8-bit install bases in automotive, appliance and industrial control designs.
Key features include a programmable 8 MHz internal oscillator that allows operation without an external crystal, an integrated Addressable USART for asynchronous serial communication, two analog comparators, one Capture/Compare/PWM (CCP) module, nanoWatt power-managed sleep modes, and on-chip In-Circuit Serial Programming (ICSP) plus In-Circuit Debug (ICD). The 16 I/O pins are 5 V-tolerant and the analog comparator pair supports basic signal conditioning for sensor interface applications.
Internally, PIC16F87-E/ML uses a Harvard-architecture CPU with separate program and data buses, a 14-bit-wide instruction word (typical of mid-range PIC16 devices), and a hardware stack. Five I/O ports (Port A–E with PORTE limited by 28-pin pin-out) route digital and analog signals. The CCP and USART peripherals share timers and I/O, so system architects must plan allocation at firmware design time.
Typical applications include automotive body modules, white goods and appliance control boards, industrial sensor interfaces, general-purpose sensor hubs, and battery-powered consumer devices that require low standby current from the nanoWatt sleep modes. The 'E' temperature grade and QFN package make it a strong fit for compact automotive electronic control units (ECUs) where PCB area is constrained and ambient temperatures under-hood or in-cabin are demanding.
When using PIC16F87-E/ML, place decoupling capacitors (100 nF plus 1–10 µF bulk) directly at VDD/VSS pins and keep the MCLR reset trace short to avoid spurious resets. Designers should also reserve the ICSP/ICD pins (RB6/RB7) for in-circuit programming and not commit them to other peripherals.
This page synthesizes distributor pricing, drop-in alternatives, AEC-Q100 compliance notes and practical design guidance that go well beyond the manufacturer datasheet. Information current as of 2026-09-22.
Bộ thay thế dễ dàng lắp đặt cho PIC16F87-E/ML — 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-E/ML (cùng hình factor và footprint) — khác nhau ở Package, Internal Oscillator, Operating Temperature, ADC, EEPROM Size.
PIC16F87-I/ML
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F86-I/ML
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16F87T-E/ML
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F871-E/PT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16F876A-E/ML
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F87-E/ML Tỷ lệ tối đa & tính chất điện
| Core | 8-bit PIC16 RISC |
| Instruction Set Width | 14-bit |
| Instruction Count | 35 single-word instructions |
| Instruction Execution Time | 200 ns (at 20 MHz) |
| Maximum Clock Speed | 20 MHz |
| Internal Oscillator | 8 MHz (factory calibrated, software-selectable) |
| Program Memory (Flash) | 7 KB (4K x 14) |
| Data EEPROM | 256 bytes |
| Data SRAM | 368 bytes |
| I/O Pins | 16 |
| Điện áp cung cấp | 4.0 V to 5.5 V |
| Nhiệt độ hoạt động | -40 °C to +125 °C (automotive 'E' grade) |
| Hộp | 28-QFN, 6 x 6 mm (HVQCCN, 'ML' suffix) |
| Kiểu lắp đặt | Surface Mount (no-lead QFN) |
| Communication Peripherals | Addressable USART, I²C/SPI (SSP) |
| Analog Peripherals | 2 Comparators |
| Timers/CCP | 1 CCP module, 3 timers (TMR0, TMR1, TMR2) |
| Programming/Debug | ICSP + ICD (2-wire) |
| Power-Saving Modes | nanoWatt (Sleep, Idle, etc.) |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC16F87-E/ML
| Chân 1 | RA2/AN2/VREF- — Port A bit 2 / analog channel 2 / negative voltage reference |
| Chân 2 | RA3/AN3/VREF+ — Port A bit 3 / analog channel 3 / positive voltage reference |
| Chân 3 | RA4/T0CKI — Port A bit 4 / Timer0 external clock input |
| Chân 4 | RA5/SS/AN4 — Port A bit 5 / SPI slave select / analog channel 4 |
| Chân 5 | VSS — Ground reference |
| Chân 6 | OSC1/CLKIN — External clock input / crystal pin 1 |
| Chân 7 | OSC2/CLKOUT — Crystal pin 2 / clock output |
| Chân 8 | RC0/T1OSO/T1CKI — Port C bit 0 / Timer1 oscillator output / clock input |
| Chân 9 | RC1/T1OSI — Port C bit 1 / Timer1 oscillator input |
| Chân 10 | RC2/CCP1 — Port C bit 2 / Capture-Compare-PWM 1 output |
| Chân 11 | RC3/SCK/SCL — Port C bit 3 / SPI clock / I²C clock |
| Chân 12 | RC4/SDI/SDA — Port C bit 4 / SPI data in / I²C data |
| Chân 13 | RC5/SDO — Port C bit 5 / SPI data out |
| Chân 14 | RC6/TX/CK — Port C bit 6 / USART transmit / clock |
| Chân 15 | RC7/RX/DT — Port C bit 7 / USART receive / data |
| Chân 16 | VSS — Ground reference (second bond on QFN package) |
| Chân 17 | VDD — Positive supply voltage |
| Chân 18 | RB0/INT — Port B bit 0 / external interrupt |
| Chân 19 | RB1 — Port B bit 1 |
| Chân 20 | RB2 — Port B bit 2 |
| Chân 21 | RB3/PGM — Port B bit 3 / LVP programming pin |
| Chân 22 | RB4 — Port B bit 4 |
| Chân 23 | RB5 — Port B bit 5 |
| Chân 24 | RB6/PGC — Port B bit 6 / ICSP clock (programming) |
| Chân 25 | RB7/PGD — Port B bit 7 / ICSP data (programming) |
| Chân 26 | MCLR/Vpp/RE3 — Master clear reset / programming voltage / Port E bit 3 (Note: on 28-pin QFN this pin serves as MCLR/Vpp and is shared with PORTE) |
| Chân 27 | RA6/AN6 — Port A bit 6 / analog channel 6 (alternate oscillator configuration) / digital I/O |
| Chân 28 | RA7/AN7 — Port A bit 7 / analog channel 7 (alternate oscillator configuration) / digital I/O |
Ứng dụng tiêu biểu
PIC16F87-E/ML phù hợp cho 6 Áp dụngs: Automotive Body Control Module, Home Appliance Control Board, Industrial Sensor Interface Module, Battery-Powered Sensor Node, HVAC and Thermostat Controller, Simple Consumer Remote and HMI.
Automotive Body Control Module
The PIC16F87-E/ML fits automotive body control modules because its 7 KB Flash, 256-byte EEPROM and 16 I/O are sufficient to drive lighting, wiper, mirror and door-lock actuators while the E-grade -40 °C to +125 °C rating handles under-dash and in-cabin ambient. The 20 MHz instruction cycle is fast enough for 10 ms body-CAN-style scheduling; the Addressable USART plus SSP serializer large messages to a downstream body controller. Compared with newer PIC16F1xxxx options, PIC16F87-E/ML remains favored where boot-leg or migration-safety demands the well-known mid-range architecture.
Được đề xuất
Home Appliance Control Board
PIC16F87-E/ML is a strong fit for white-goods control boards in washers, dishwashers and refrigerators: 7 KB Flash hosts motor-control state machines, 256-byte EEPROM retains user settings, and the 2 analog comparators evaluate sensor thresholds without external op-amps. The 28-QFN footprint lets designers shrink the PCB versus 28-SOIC alternatives while staying within the same BOM footprint. Designers use the CCP module to drive TRIAC-controlled AC loads and the USART to drive LED/HMI front-panels.
Được đề xuất
Industrial Sensor Interface Module
The PIC16F87-E/ML handles sensor aggregation in industrial panels where 16 I/O is enough to read switches, encoders or 4–20 mA-derived analog signals via the built-in comparators, and the USART streams digital values to a host PLC. Its automotive-extended -40 °C to +125 °C range plus 5 V I/O tolerates the harsh installed environments of factory floors and outdoor cabinets. The CCP driving PWMs also drives analog inputs via filter-and-buffer front-ends for proportional-valve control loops.
Được đề xuất
Battery-Powered Sensor Node
PIC16F87-E/ML supports battery-powered sensor nodes thanks to its nanoWatt Sleep modes drawing low quiescent current, 7 KB Flash holding sensor-fusion firmware, and USART waking the radio transceiver only on events. With 4 V to 5.5 V supply and 16 I/O, the device can be paired with a 4-series AA pack or a lithium chemistries via an LDO. Designers extend battery life by clocking down to the 8 MHz internal oscillator and parking the CPU in Sleep between sensor reads.
Được đề xuất
HVAC and Thermostat Controller
In HVAC and thermostat controllers the PIC16F87-E/ML executes on/off and PID loops for relays and TRIACs while monitoring NTC thermistors via the 2 built-in comparators. The 256-byte EEPROM stores schedule and setpoint data that survives power cycles, and the 7 KB Flash handles menu logic and adaptive control algorithms. The 28-QFN 6x6 mm footprint fits inside slim wall-mount thermostats where PCB height is at a premium.
Được đề xuất
Simple Consumer Remote and HMI
PIC16F87-E/ML serves as the controller inside simple consumer remotes and HMI panels: the addressable USART or SSP port drives LED drivers, while the CCP drives PWM dim control, and the 16 I/O support key matrices and rotary encoders. The 7 KB Flash holds IR/RF protocol stacks and audio-cue firmware, and the 28-QFN 6x6 mm package stays small inside slim remote enclosures. The automotive-grade temperature grade also makes the same firmware usable in dashboards or motorcycles.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16F87-E/ML — 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/ML | PIC16F86-I/ML | PIC16F87T-E/ML | PIC16F871-E/PT | PIC16F876A-E/ML |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-QFN (6x6) | 28-QFN (6x6) - same | 28-QFN (6x6) - same | 28-QFN (6x6) - same | 28-QFN (6x6) - same | 28-QFN (6x6) - same |
| Maximum Clock Speed | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 16 MHz (-20%) | 20 MHz |
| Program Flash | 7 KB (4K x 14) | 7 KB (4K x 14) | 3.5 KB (-50%) | 7 KB (4K x 14) | 5 KB | 14 KB (+100%) |
| Data EEPROM | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 64 bytes | 256 bytes |
| Data SRAM | 368 bytes | 368 bytes | 368 bytes | 368 bytes | 128 bytes | 368 bytes |
| Temperature Grade | -40 °C to +125 °C (E / automotive) | -40 °C to +85 °C (industrial) | -40 °C to +85 °C (industrial) | -40 °C to +125 °C (E / automotive) | -40 °C to +125 °C (E / automotive) | -40 °C to +125 °C (E / automotive) |
| Analog Peripherals | 2 Comparators | 2 Comparators | 2 Comparators | 2 Comparators | 8 ch 10-bit ADC, no comparators | 5 ch 10-bit ADC + Comparators |
Bảo phân biệt quan trọng
- Larger program Flash within same family footprint (vsPIC16F86-I/ML)
- Automotive temperature grade in a 28-QFN footprint (vsPIC16F876A-E/ML)
- On-chip EEPROM data memory (vsPIC16F871-E/PT)
Ghi chú thiết kế
Decoupling must include a 100 nF X7R ceramic placed within 3 mm of VDD and a bulk 1–10 µF tantalum or ceramic at the board supply entry. PIC16F87-E/ML has multiple VDD/VSS pins on a QFN package — every one must be tied to reduce supply-noise coupling and to provide a low-impedance return for the internal logic. Brown-out detection should be enabled in the configuration bits so partial-power-down events do not corrupt EEPROM writes.
Keep MCLR traces short and use an RC delay (typ. 10 kΩ plus 1 µF) to provide reset noise immunity in automotive environments where ignition transients can couple onto the line. Reserve pins RB6 (PGC) and RB7 (PGD) for ICSP/ICD and avoid routing noisy signals over them, otherwise production programmers lose contact. For QFN devices, expose the exposed thermal pad — even though 8-bit PICs dissipate very little power — and tie it to the ground plane for thermal relief and mechanical solder-joint robustness.
Do not assume the 8 MHz internal oscillator is accurate enough for USART operation at higher baud rates; switch to an external crystal (HS mode) or LF-INTOSC with calibrated USART divider values when serial error budgets tighten. Watch out for read-modify-write hazards on the PORT registers — read the LAT register and use it for the write-back to avoid spurious I/O toggling. Finally, when migrating from PIC16F86 to PIC16F87, double-check that the larger Flash region is mapped into the program's high-water-mark and the reset/interrupt vectors still land at 0x0000/0x0004.
Thông tin tuân thủ
E-grade -40 °C to +125 °C suffix suggests automotive intent but AEC-Q100 is not explicitly listed in Microchip automotive grade table for this part number per the verified data. Verify factory certificate of conformance for safety-critical automotive platforms.
