PIC16LF870T-I/SO - 8-Bit 20MHz 3.5KB Flash MCU | Microchip
MPN: PIC16LF870T-I/SO ✓ Hoạt độngPIC16LF870T-I/SO Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory (Flash/ROM), volatile working memory (RAM), and peripheral interfaces (ADC, timers, UART, I/O pins) into one IC. The PIC16F family sits in the low-to-mid pin-count tier of Microchip's 8-bit portfolio, positioned above the PIC12/PIC14 baseline and below the 16-bit dsPIC/PIC24 families. The PIC16LF870T-I/SO belongs to the PIC16F87x sub-family, which is widely used in cost-sensitive embedded control designs.
Key features include 35 single-word instructions for fast code development, an industrial -40C to +85C operating temperature grade, an integrated ICD (In-Circuit Debugger) interface, and 5 channels of 10-bit ADC for sensor and analog signal acquisition. The wide 2.0V to 5.5V supply voltage range allows battery-powered operation and direct interface to 5V systems. The 22 I/O pins support up to 25 mA source/sink per pin, enabling direct LED and relay drive.
Architecturally, the device uses a Harvard RISC core with separate program and data buses, allowing instruction fetch and operand read in the same cycle. The internal Flash supports self-programming for field-upgradeable firmware, and 64 bytes of EEPROM are available for non-volatile data storage. The 20 MHz oscillator with a 4x PLL option delivers deterministic interrupt latency, which simplifies real-time control loops.
Typical applications include industrial sensor interfaces, HVAC control, low-end motor control, LED lighting controllers, battery chargers, and consumer appliances. The integrated 10-bit ADC and ample I/O count make it a fit for any design that requires analog sensing plus digital actuation in a single chip.
When designing with this part, derate I/O source/sink current when multiple pins switch simultaneously to stay within the package thermal limit. The ICD pins are shared with general-purpose I/O and must be re-mapped when not used for debugging. The 28-SOIC package offers a wider footprint than QFN alternatives, easing hand-prototyping and rework.
This page synthesizes drop-in alternatives, distributor pricing, and practical design notes not found in the standalone manufacturer datasheet, helping engineers shorten the BOM validation cycle.
Bộ thay thế dễ dàng lắp đặt cho PIC16LF870T-I/SO — 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 PIC16LF870T-I/SO (cùng hình factor và footprint) — khác nhau ở Core Architecture, Package.
PIC16LF870-I/SO
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16F870-I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LF870T-I/SO Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC 8-bit RISC |
| Program Memory | 3.5 KB (2K x 14) Flash |
| RAM | 128 bytes |
| Data EEPROM | 64 bytes |
| CPU Speed | 20 MHz (200 ns instruction cycle) |
| Instruction Set | 35 single-word instructions |
| Điện áp cung cấp | 2.0 V to 5.5 V |
| I/O Pins | 22 |
| ADC | 10-bit, 5 channels |
| Nhiệt độ hoạt động | -40 C to +85 C (Industrial) |
| Hộp | 28-SOIC (SO) 7.50 mm |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
| AEC-Q100 | Not qualified |
Cấu hình chân PIC16LF870T-I/SO
| Chân 1 | MCLR/VPP/RA5 — Master Clear (Reset) input / Programming voltage |
| Chân 2 | RA0/AN0 — PORTA bit 0 / Analog input channel 0 |
| Chân 3 | RA1/AN1 — PORTA bit 1 / Analog input channel 1 |
| Chân 4 | RA2/AN2 — PORTA bit 2 / Analog input channel 2 |
| Chân 5 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input channel 3 / ADC VREF+ |
| Chân 6 | RA4/AN4 — PORTA bit 4 / Analog input channel 4 |
| Chân 7 | RA5/AN5 — PORTA bit 5 / Analog input channel 5 |
| Chân 8 | VSS — Ground reference |
| Chân 9 | OSC1/CLKIN — Oscillator crystal input / External clock input |
| Chân 10 | OSC2/CLKOUT — Oscillator crystal output / Clock output |
| Chân 11 | RC0/T1OSO — PORTC bit 0 / Timer1 oscillator output |
| Chân 12 | RC1/T1OSI — PORTC bit 1 / Timer1 oscillator input |
| Chân 13 | RC2/CCP1 — PORTC bit 2 / Capture/Compare/PWM1 output |
| Chân 14 | RC3 — PORTC bit 3 |
| Chân 15 | RC4 — PORTC bit 4 |
| Chân 16 | RC5 — PORTC bit 5 |
| Chân 17 | RC6 — PORTC bit 6 |
| Chân 18 | RC7 — PORTC bit 7 |
| Chân 19 | VSS — Ground reference |
| Chân 20 | VDD — Positive supply voltage |
| Chân 21 | RB0/INT — PORTB bit 0 / External interrupt input |
| Chân 22 | RB1 — PORTB bit 1 |
| Chân 23 | RB2 — PORTB bit 2 |
| Chân 24 | RB3 — PORTB bit 3 |
| Chân 25 | RB4 — PORTB bit 4 |
| Chân 26 | RB5 — PORTB bit 5 |
| Chân 27 | RB6/PGC — PORTB bit 6 / ICD clock (programming) |
| Chân 28 | RB7/PGD — PORTB bit 7 / ICD data (programming) |
Ứng dụng tiêu biểu
PIC16LF870T-I/SO phù hợp cho 6 Áp dụngs: Industrial Sensor Interface, HVAC Control Systems, LED Lighting Controllers, Battery Chargers and Portable Devices, Low-End Motor Control, Consumer Appliance Controllers.
Industrial Sensor Interface
The PIC16LF870T-I/SO suits industrial sensor interface boards where 22 I/O pins and 5 channels of 10-bit ADC enable direct connection to temperature, pressure, and flow sensors. The 2.0-5.5V supply range tolerates 24V industrial rails stepped down by simple regulators. Per Microchip datasheet 30414D, the 200 ns instruction cycle supports deterministic 1 kHz sensor sampling loops, while the integrated 10-bit ADC removes the need for an external converter. Combined with the -40C to +85C industrial temperature grade, the part handles factory-floor environments. Recommended companion parts include the MCP6002 op-amp for signal conditioning and the MCP9700 analog temperature sensor.
Được đề xuất
HVAC Control Systems
In HVAC control boards, the PIC16LF870T-I/SO drives relays, triacs, and LED indicators while sampling thermistor and pressure transducer inputs. The 22 I/O count allows fan-speed relay control plus LCD interface without external logic, and the 20 MHz CPU executes PID control loops within 1 ms per iteration per the 200 ns instruction cycle specification. The wide 2.0-5.5V supply range supports 24V AC-derived rails. The 10-bit ADC provides 9.8 mV resolution at 5V reference, which is adequate for thermistor linearization. The industrial -40C to +85C temperature grade covers rooftop and basement equipment. Recommended companion parts: ULN2003 driver array and MCP1700 LDO.
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LED Lighting Controllers
The PIC16LF870T-I/SO works well in dimmable LED drivers and architectural lighting controllers, where its 22 I/O pins drive multiple MOSFET high-side switches and read zero-cross detector signals for TRIAC phase-cut dimming. The 200 ns instruction cycle enables 10 kHz PWM resolution, exceeding the typical 1 kHz PWM requirement for flicker-free LED dimming. Per Microchip datasheet 30414D, the 10-bit ADC enables ambient light sensor feedback for closed-loop brightness control. The wide supply range supports both 12V DC and 24V AC LED driver topologies. The 128-byte RAM accommodates color-mixing tables for RGBW fixtures. Recommended companion parts: IRF540N N-MOSFET and MCP73831 Li-Ion charger for backup battery.
Được đề xuất
Battery Chargers and Portable Devices
In battery chargers and portable devices, the PIC16LF870T-I/SO benefits from its 2.0V minimum supply, allowing operation directly from a single Li-Ion cell down to cutoff voltage. The 128-byte RAM stores charging profile state machines, while the 64-byte EEPROM retains learned battery capacity parameters across power cycles. The 20 MHz CPU executes Coulomb-counting algorithms at 100 Hz sample rate within 30 percent of CPU budget per Microchip datasheet 30414D. The 10-bit ADC reads battery voltage and current sense resistors with adequate resolution for charge termination. Recommended companion parts: MCP73831 single-cell Li-Ion charger and MCP9700 temperature sensor for thermal protection.
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Low-End Motor Control
Brush DC and small stepper motor control applications benefit from the PIC16LF870T-I/SO's 22 I/O pins (each capable of 25 mA sink), which can directly interface with H-bridge drivers and encoder inputs. The 20 MHz instruction cycle produces 50 kHz PWM frequency with 10-bit duty resolution, smooth enough for low-vibration stepper operation. The 10-bit ADC reads back-EMF or current sense for closed-loop torque control, with 5 input channels supporting multi-axis coordination. The -40C to +85C industrial grade covers motor ambient temperatures. Recommended companion parts: DRV8871 motor driver and AS5048A magnetic encoder.
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Consumer Appliance Controllers
In consumer appliances such as coffee makers, washing machines, and small kitchen devices, the PIC16LF870T-I/SO provides enough I/O for keypad input, 7-segment or LCD display drive, and triac-based heating element control. The 3.5 KB Flash stores menu state machines and timing profiles, while the 64-byte EEPROM retains user preferences across power cycles. The integrated 10-bit ADC reads temperature sensors, water level sensors, and weight sensors with adequate accuracy for appliance-grade control. The wide 2.0-5.5V supply range supports both mains-derived and battery backup designs. Recommended companion parts: HT1621 LCD driver and MOC3021 optoisolator for triac drive.
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Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16LF870T-I/SO — 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 | PIC16LF870-I/SO | PIC16F870-I/SO | PIC16LF870T-I/SS |
|---|---|---|---|---|
| Package | 28-SOIC | 28-SOIC (tube) | 28-SOIC | 28-SSOP (footprint differs) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Supply Voltage | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 4.0 V to 5.5 V | 2.0 V to 5.5 V |
| Program Memory | 3.5 KB Flash | 3.5 KB Flash | 3.5 KB Flash | 3.5 KB Flash |
| CPU Speed | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| I/O Pins | 22 | 22 | 22 | 22 |
| ADC | 10-bit, 5 channels | 10-bit, 5 channels | 10-bit, 5 channels | 10-bit, 5 channels |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| Carrier Packaging | Tape & Reel | Tube | Tube | Tape & Reel |
Bảo phân biệt quan trọng
- Same SOIC-28 package with same die as PIC16LF870-I/SO tube variant (vsPIC16LF870-I/SO)
- Wider supply voltage range than PIC16F870-I/SO (vsPIC16F870-I/SO)
- Smaller SSOP footprint option available as same-brand drop-in (vsPIC16LF870T-I/SS)
Ghi chú thiết kế
The PIC16LF870T-I/SO requires a 0.1 uF decoupling capacitor on VDD within 5 mm of the pin, plus a bulk 10 uF tantalum or aluminum capacitor on the supply rail. The 2.0-5.5V supply tolerates both 3.3V and 5V operation but the MCLR pull-up voltage should match VDD for predictable reset behavior. When powering from a switching regulator, place an additional LC pi-filter on the MCU supply line to suppress PWM-frequency ripple that can couple into the ADC measurements.
The 28-SOIC footprint is 7.5 mm wide, much wider than the 28-QFN alternative. Route the ICSP clock and data pins (RB6/RB7) directly to a 0.1 inch header for in-circuit programming access. Keep ADC traces away from high-current switching nodes to minimize digital noise coupling. Place the crystal or resonator within 5 mm of OSC1/OSC2 and keep the oscillator traces short and surrounded by ground pour.
Do not leave the MCLR pin floating - a 10 kohm pull-up to VDD is mandatory to prevent spurious resets from noise. When using the internal oscillator, disable the OSC1/OSC2 pins as GPIO to prevent contention. For ADC readings, allow at least 2 us acquisition time by setting the appropriate ACQT bits in ADCON2 per Microchip datasheet 30414D. Avoid setting all 22 I/O pins to high current simultaneously, which can exceed the package thermal limit.
Thông tin tuân thủ
RoHS and REACH compliance confirmed by Microchip product page. Not AEC-Q100 qualified - select PIC16F or dsPIC automotive-grade parts for vehicular applications. Lead-free matte-tin finish on 28-SOIC leads.
