PIC16F872T-I/SS - 20MHz 8-Bit Flash MCU, 3.5KB | Microchip
MPN: PIC16F872T-I/SS ✓ Hoạt độngPIC16F872T-I/SS Tóm tắt
A microcontroller (MCU) is a single-chip computer containing a CPU, memory, and programmable I/O peripherals. The PIC16F872 belongs to Microchip's PIC16F mid-range family, a category of 8-bit RISC microcontrollers known for low power consumption (nanoWatt technology), small code footprint, and deterministic interrupt response. Within the broader hierarchy, PIC16F872 sits as: 8-bit MCU -> parallel RISC controller -> parallel microcontroller -> parallel embedded controller -> parallel semiconductor. This category placement matters because 8-bit PIC MCUs dominate cost-sensitive, low-power embedded designs where compute headroom is secondary to determinism and energy efficiency.
Key features include 35 single-word instructions (all single-cycle except program branches, which are two-cycle), an operating voltage range of 4.0 V to 5.5 V, and an industrial temperature range of -40C to +85C. The 28-SSOP package supports surface-mount assembly with standard JEDEC land patterns. The integrated nanoWatt technology provides multiple power-saving modes that reduce quiescent current during idle periods. Five channels of 10-bit ADC enable direct sensor interfacing without external converters, simplifying BOM in measurement and control applications.
The PIC16F872 uses a Harvard-architecture RISC core with separate program and data buses, which lets the CPU fetch the next instruction while accessing data memory in the same cycle. Self-programming capability allows field firmware updates through the ICSP pins without external programming hardware, simplifying manufacturing and after-sale service workflows. The architecture is upwards compatible with PIC16C5X, PIC12CXXX, and PIC16C7X devices, easing migration from legacy Microchip designs.
Typical applications include industrial sensor interfaces, motor control subsystems, low-cost consumer appliances, HVAC controllers, automotive body electronics (non-safety), and battery-powered instruments. The 22 I/O pins and ADC channels provide sufficient peripheral density for many mid-range embedded tasks.
When designing with this device, ensure Vdd decoupling follows Microchip's reference layout: a 0.1 uF ceramic capacitor close to the Vdd pin plus a bulk tantalum or electrolytic cap on the supply rail. The MCLR pin must be pulled high through a resistor for normal operation.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho PIC16F872T-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 PIC16F872T-I/SS (cùng hình factor và footprint) — khác nhau ở Package, ADC, Core Architecture, Self-Programming, Timers.
PIC16F872-I/SS
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16F872T-E/SS
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC16LF872-I/SS
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16LF872T-I/SS
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC16F870T-I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F870-I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F872T-I/SS Tỷ lệ tối đa & tính chất điện
| Manufacturer | Microchip Technology |
| Series | PIC16F |
| Core Processor | PIC |
| Core Size | 8-bit |
| Maximum Clock Speed | 20 MHz |
| Instruction Cycle Time | 200 ns |
| Program Memory Size | 3.5 KB (2K x 14) Flash |
| RAM Size | 128 x 8 bytes |
| EEPROM Size | 64 x 8 bytes |
| Number of I/O Pins | 22 |
| ADC | 5 channels x 10-bit |
| Supply Voltage Range | 4.0 V to 5.5 V |
| Khoảng nhiệt độ hoạt động | -40C to +85C (Industrial) |
| Hộp / Vỏ | 28-SSOP (0.209 inch, MO-150) |
| Kiểu lắp đặt | Surface Mount |
| Instruction Set | 35 single-word instructions |
| Self-Programming | Yes (Flash) |
| In-Circuit Debug | Yes (ICD) |
| Power-Saving Modes | nanoWatt technology |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC16F872T-I/SS
| Chân 1 | MCLR/Vpp — Master Clear (reset) input / programming voltage |
| Chân 2 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| Chân 3 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| Chân 4 | RA2/AN2 — PORTA bit 2 / analog input 2 |
| Chân 5 | RA3/AN3/Vref+ — PORTA bit 3 / analog input 3 / ADC positive reference |
| Chân 6 | RA4/AN4 — PORTA bit 4 / analog input 4 (open-drain) |
| Chân 7 | RA5/AN5/SS — PORTA bit 5 / analog input 5 / SPI slave select |
| Chân 8 | OSC1/CLKI — Oscillator crystal input / external clock input |
| Chân 9 | OSC2/CLKO — Oscillator crystal output / clock output |
| Chân 10 | RC0 — PORTC bit 0 |
| Chân 11 | RC1 — PORTC bit 1 |
| Chân 12 | RC2 — PORTC bit 2 |
| Chân 13 | RC3 — PORTC bit 3 |
| Chân 14 | RC4 — PORTC bit 4 |
| Chân 15 | RC5 — PORTC bit 5 |
| Chân 16 | RC6 — PORTC bit 6 |
| Chân 17 | RC7 — PORTC bit 7 |
| Chân 18 | Vss — Ground reference |
| Chân 19 | Vdd — Positive supply voltage (4.0-5.5V) |
| Chân 20 | RB0/INT — PORTB bit 0 / external interrupt |
| Chân 21 | RB1 — PORTB bit 1 |
| Chân 22 | RB2 — PORTB bit 2 |
| Chân 23 | RB3 — PORTB bit 3 |
| Chân 24 | RB4 — PORTB bit 4 |
| Chân 25 | RB5 — PORTB bit 5 |
| Chân 26 | RB6/ICSPCLK — PORTB bit 6 / ICD clock |
| Chân 27 | RB7/ICSPDAT — PORTB bit 7 / ICD data |
| Chân 28 | Vss — Ground reference |
Ứng dụng tiêu biểu
PIC16F872T-I/SS phù hợp cho 6 Áp dụngs: Industrial Sensor Interface, Home Appliance Control, HVAC Climate Controller, Battery-Powered Instrument, Automotive Body Electronics, LED Lighting Controller.
Industrial Sensor Interface
The PIC16F872T-I/SS is well-suited to industrial sensor interface modules where 4-5.5V supply, 5 ADC channels, and 22 I/O pins provide direct connectivity to multiple analog and digital sensors. The 20 MHz clock and 200 ns instruction cycle enable real-time sampling of temperature, pressure, and flow sensors at rates up to ~100 kHz aggregate. Its nanoWatt Sleep mode reduces idle power below 1 uA, critical for battery-backed sensor transmitters running for years on a single cell. The 28-SSOP package withstands standard factory assembly processes and conformal coating.
Được đề xuất
Home Appliance Control
The PIC16F872T-I/SS fits home appliance control boards (washing machines, dishwashers, microwave ovens) where its 35-instruction RISC core simplifies firmware certification and its 3.5 KB Flash holds keypad handling, timing routines, and display drivers. The 5 ADC channels read thermistors, water-level sensors, and motor current feedback simultaneously. Operating from 5V and -40C to +85C, it tolerates the kitchen environment. In-Circuit Debug via RB6/RB7 allows production-line firmware updates without removal from the board.
Được đề xuất
HVAC Climate Controller
The PIC16F872T-I/SS is a strong fit for HVAC climate controllers where its 22 I/O pins drive relays, triacs, and 7-segment displays while its 5 ADC channels read thermistors for indoor/outdoor temperature, humidity sensors, and duct pressure. The nanoWatt technology keeps standby power below EPA energy-efficiency requirements. The Harvard RISC core's deterministic interrupt latency ensures consistent response to safety-critical over-temperature events. Industrial -40C to +85C operation handles unconditioned mechanical rooms.
Được đề xuất
Battery-Powered Instrument
The PIC16F872T-I/SS powers portable handheld instruments (multimeters, gas detectors, medical diagnostics) where its nanoWatt Sleep mode draws less than 1 uA idle current, enabling 5+ year battery life with intermittent measurement duty cycles. The 64 bytes of EEPROM store calibration constants without battery backup. Its 4.0-5.5V range accepts 4xAA or 9V battery packs directly. The 28-SSOP package is hand-solderable for low-volume specialty instrument manufacturing.
Được đề xuất
Automotive Body Electronics
For non-safety automotive body applications (window controllers, mirror adjusters, ambient lighting, seat controllers), the PIC16F872T-I/SS provides 22 I/O pins to drive multiple motors and LEDs while its ADC monitors position feedback. Its industrial -40C to +85C range covers cabin-mounted modules; under-hood designs require the PIC16F872T-E/SS extended-temperature variant. The 35-instruction RISC core supports legacy automotive software reuse from PIC16C7X platforms, easing migration.
Được đề xuất
LED Lighting Controller
The PIC16F872T-I/SS drives RGB LED controllers and architectural lighting systems using its PWM-capable CCP module and 22 I/O pins to address multiple channels. The 20 MHz clock supports software-PWM dimming at refresh rates high enough to avoid visible flicker (>100 Hz). Its 5 ADC channels read ambient light sensors and potentiometers for closed-loop brightness control. Flash self-programming enables field firmware updates for color-profile changes.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16F872T-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 | PIC16F872-I/SS | PIC16F872T-E/SS | PIC16LF872-I/SS | PIC16LF872T-I/SS | PIC16F870T-I/SS | PIC16F870-I/SS |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SSOP | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same |
| Program Memory | 3.5 KB Flash | 3.5 KB Flash | 3.5 KB Flash | 3.5 KB Flash | 3.5 KB Flash | 3.5 KB Flash | 3.5 KB Flash |
| RAM | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes |
| Max Clock Speed | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Operating Voltage | 4.0 V to 5.5 V | 4.0 V to 5.5 V | 4.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 4.0 V to 5.5 V | 4.0 V to 5.5 V |
| Temperature Range | -40C to +85C | -40C to +85C | -40C to +125C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| ADC Channels | 5 x 10-bit | 5 x 10-bit | 5 x 10-bit | 5 x 10-bit | 5 x 10-bit | 5 x 10-bit | 5 x 10-bit |
| I/O Pins | 22 | 22 | 22 | 22 | 22 | 22 | 22 |
| EEPROM | 64 bytes | 64 bytes | 64 bytes | 64 bytes | 64 bytes | 64 bytes | 64 bytes |
Bảo phân biệt quan trọng
- Includes both ICD pins (RB6/RB7) and self-programming Flash (vsPIC16F870T-I/SS)
- Wider operating temperature range available in same package (vsPIC16F872T-E/SS)
- 5-channel 10-bit ADC vs competitor 8-bit MCUs at lower cost (vsPIC16F873A-I/SS)
Ghi chú thiết kế
Decouple the PIC16F872T-I/SS Vdd pin with a 0.1 uF ceramic capacitor placed within 5 mm of the package pin, plus a 10 uF bulk tantalum or electrolytic capacitor on the supply rail. According to Microchip's reference layout, the small ceramic handles high-frequency switching transients from digital I/O while the bulk cap stabilizes the analog supply during ADC conversions. Avoid routing high-current switching traces under or near the Vdd pin to prevent supply noise coupling into ADC measurements.
The MCLR pin (pin 1) must be pulled high through a 10 kohm resistor for normal operation; leaving it floating or directly tied to Vdd prevents reset generation and ICD entry. When using In-Circuit Serial Programming (ICSP), the MCLR/Vpp pin must be capable of withstanding the 13V programming voltage - do not place a clamping diode or capacitor directly on MCLR. According to Microchip's programming specification, the ICSP DAT and CLK lines (RB7/RB6) require isolation resistors when sharing with application circuitry.
Route the analog ADC inputs (RA0-RA5) away from digital switching signals and clock traces to minimize coupling noise. Use a ground pour under the analog section, and consider a separate analog ground star-point at the Vss pin if mixed-signal performance is critical. According to Microchip's mixed-signal layout guide, the ADC reference voltage (Vref+/Vref-) should be bypassed with 0.1 uF and 10 uF capacitors placed close to the reference pins.
The PIC16F872T-I/SS in 28-SSOP package dissipates approximately 100 mW typical at 20 MHz and 5V, well within the package thermal limits. At industrial -40C to +85C operation, no heatsinking is required. However, when operating continuously at maximum clock and I/O loading, estimate junction temperature using theta_JA of approximately 70 C/W for SSOP and verify it remains below 125C using the formula Tj = Ta + Pd * theta_JA.
Thông tin tuân thủ
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified - not intended for automotive safety-critical systems. Lead-free and halogen-free per Microchip environmental compliance documentation. Conflict minerals compliant per Microchip's Dodd-Frank disclosure.
