PIC16F818T-I/SSTSL - 20MHz 8-bit Flash MCU 1.75KB | Microchip
MPN: PIC16F818T-I/SSTSL ✓ Hoạt độngPIC16F818T-I/SSTSL Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and programmable I/O peripherals on one die. The PIC16F818 belongs to the mid-range PIC16 family (hypernyms: 8-bit MCU -> microcontroller -> embedded controller -> semiconductor IC). It uses a RISC Harvard architecture with only 35 single-word instructions, allowing compact code generation and predictable interrupt latency, which makes the family well-suited for deterministic real-time control tasks.
Key features include an internal RC oscillator selectable up to 8 MHz, 10-bit ADC with up to 5 channels, 1 capture/compare/PWM module, an enhanced USART for asynchronous and synchronous serial communication, and a 10-bit PWM generator. NanoWatt Technology provides multiple power-managed modes - Run, Idle, and Sleep - with typical Sleep currents in the microamp range, enabling battery-friendly duty-cycled designs. The device supports in-circuit serial programming (ICSP) via two pins, allowing firmware updates after PCB assembly.
The enhanced mid-range core adds hardware interrupt context saving, a deeper hardware stack, and up to 256 bytes of access RAM, which the older PIC16C7x/PIC16C62xA/PIC16C5X/PIC12Cxxx baselines lack. Code written for these legacy parts is upward-compatible with the PIC16F818, simplifying migration from older 18-pin/20-pin PIC designs.
Typical applications include appliance control, sensor conditioning front-ends, low-cost motor control, LED lighting controllers, security keypads, and consumer white goods. The wide operating voltage and low Sleep current also make it a fit for battery-powered instrumentation and remote sensor nodes.
When designing with this part, reserve the ICSP pins (RB6/RB7) for in-system programming access. Place the decoupling capacitor within 5 mm of VDD and use a 100 nF X7R for digital noise suppression; add a 10 uF bulk capacitor if the supply has long traces.
This page synthesizes distributor pricing, parametric drop-in alternatives, and practical design notes not consolidated on a single manufacturer or distributor page, giving engineers a faster decision path than the Microchip PIC16F818/819 datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho PIC16F818T-I/SSTSL — 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 PIC16F818T-I/SSTSL (cùng hình factor và footprint) — khác nhau ở ADC, Internal Oscillator, Package, Core Architecture, Program Memory (Flash).
PIC16F818T-I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F818-I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F818T-I/MLTSL
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F88-I/SS
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16F819-I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F818T-I/SSTSL Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC16 enhanced 8-bit RISC |
| Program Memory | 1.75 KB (1K x 14) Flash |
| Data EEPROM | 128 bytes |
| Data SRAM | 128 bytes |
| CPU Speed | 20 MHz max (200 ns instruction cycle) |
| Operating Voltage | 2.0 V to 5.5 V |
| I/O Pins | 16 |
| ADC | 10-bit, up to 5 channels |
| Timers | Timer0, Timer1, Timer2 |
| PWM | 10-bit PWM (1 channel, ECCP) |
| Communication | EUSART (RS-232/485), ICSP |
| Internal Oscillator | Yes, 31 kHz to 8 MHz selectable |
| Nhiệt độ hoạt động | -40C to +85C (Industrial) |
| Hộp | 20-pin SSOP (5.30 mm body width) |
| Kiểu lắp đặt | Surface Mount, Tape & Reel |
| Instruction Set | 35 single-word instructions |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC16F818T-I/SSTSL
| Chân 1 | MCLR/VPP/RA5 — Master clear (reset) input / programming voltage / PORTA bit 5 |
| 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/CVREF — PORTA bit 2 / analog input channel 2 / comparator voltage reference |
| Chân 5 | RA3/AN3/VREF+ — PORTA bit 3 / analog input channel 3 / ADC positive reference |
| Chân 6 | RA4/AN4/T0CKI — PORTA bit 4 / analog input channel 4 / Timer0 clock input |
| Chân 7 | AVSS — Analog ground |
| Chân 8 | AVDD — Analog positive supply |
| Chân 9 | OSC1/CLKI/RA7 — Crystal oscillator input / external clock input / PORTA bit 7 |
| Chân 10 | OSC2/CLKO/RA6 — Crystal oscillator output / clock output / PORTA bit 6 |
| Chân 11 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| Chân 12 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 module |
| Chân 13 | RC2/CCP1 — PORTC bit 2 / ECCP module input/output |
| Chân 14 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Chân 15 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Chân 16 | RC5/SDO — PORTC bit 5 / SPI data out |
| Chân 17 | RC6/TX/CK — PORTC bit 6 / EUSART TX / SPI clock |
| Chân 18 | RC7/RX/DT — PORTC bit 7 / EUSART RX / SPI data |
| Chân 19 | VSS — Digital ground |
| Chân 20 | VDD — Digital positive supply |
Ứng dụng tiêu biểu
PIC16F818T-I/SSTSL phù hợp cho 7 Áp dụngs: Appliance Control Boards, Battery-Powered Sensor Nodes, LED Lighting Controllers, Security Keypads and Access Control, Consumer White Goods and HVAC, Automotive Interior Accessories (Non-Safety), Industrial Sensor Conditioning.
Appliance Control Boards
PIC16F818T-I/SSTSL fits appliance control boards where deterministic 200 ns instruction execution and 16 I/O pins drive relays, triacs, and sensor inputs. Its 10-bit ADC reads temperature sensors (NTC) and voltage dividers for power-line monitoring, while the ECCP module generates PWM for triac phase-angle control of heater elements or universal-motor speed. NanoWatt Sleep mode lets the MCU draw microamp-level standby current between button presses, meeting ENERGY STAR idle budgets for white goods. The wide 2.0-5.5 V VDD range accommodates both 3.3 V logic-level keypads and 5 V relay-driver rails from a single part.
Được đề xuất
Battery-Powered Sensor Nodes
For battery-powered sensor nodes, PIC16F818T-I/SSTSL's NanoWatt Sleep current (typically <1 uA) and internal 31 kHz-8 MHz RC oscillator let the MCU wake periodically, sample a sensor, and return to Sleep without external components. The 128-byte EEPROM logs calibration or hourly readings without battery backup, and 16 I/O pins support I2C sensor buses plus interrupt-driven wake lines. Operating down to 2.0 V allows 2xAA alkaline or single Li-ion cell designs without boost converters. The 20-pin SSOP footprint is friendly to compact sensor PCBs.
Được đề xuất
LED Lighting Controllers
PIC16F818T-I/SSTSL drives LED lighting controllers where the ECCP module produces 10-bit PWM dimming across RGB or single-channel high-brightness LEDs. The 20 MHz core handles DMX-512 or DALI receive parsing via the EUSART while maintaining smooth dim curves, and the 10-bit ADC monitors LED current via a sense resistor for closed-loop brightness regulation. The 2.0-5.5 V range simplifies compatibility with both 3.3 V logic-level LEDs and 5 V analog dimming interfaces. The wide -40C to +85C industrial temp range suits outdoor fixtures.
Được đề xuất
Security Keypads and Access Control
PIC16F818T-I/SSTSL serves security keypads where the EUSART interfaces with RFID readers or Zigbee modules, and 16 I/O pins scan 4x4 matrix keypads with minimal ghosting. The 1.75 KB Flash stores encrypted credential tables, while 128-byte EEPROM retains user records across power cycles. The 200 ns instruction execution ensures sub-millisecond debounce and tamper-loop response, and the ICSP interface allows field firmware updates via service-tool headers. The 20-SSOP footprint fits behind standard wall-mount keypads.
Được đề xuất
Consumer White Goods and HVAC
PIC16F818T-I/SSTSL is well-matched to consumer white goods and HVAC thermostats where a mix of analog sensing and digital control is required. The 10-bit ADC reads thermistor inputs, the ECCP module drives triac-fired compressor or blower loads, and the EUSART links to a Wi-Fi or BLE module for cloud connectivity. The 2.0-5.5 V VDD range supports direct operation from 5 V standby rails in mains-powered equipment, and the -40C to +85C industrial grade handles outdoor thermostat enclosures. NanoWatt Idle mode keeps standby power below 0.5 W for ENERGY STAR compliance.
Được đề xuất
Automotive Interior Accessories (Non-Safety)
PIC16F818T-I/SSTSL handles automotive interior accessories such as dome-light controllers, seat-heater keypads, and aftermarket gauge clusters where 16 I/O pins and a 10-bit ADC are sufficient. The -40C to +85C industrial grade covers cabin-temperature operation, and the wide VDD range tolerates cranking transients when paired with a TVS-protected 5 V regulator. The 20-SSOP package fits inside tight dashboard enclosures. For under-hood or safety-critical applications, migrate to AEC-Q100-qualified PIC16F equivalents.
Được đề xuất
Industrial Sensor Conditioning
PIC16F818T-I/SSTSL conditions industrial 4-20 mA or 0-10 V sensor signals by digitizing them with its 10-bit ADC and outputting calibrated values over the EUSART as RS-485 Modbus frames. The 20 MHz core processes linearization, averaging, and fault-detection algorithms in real time, and the 128-byte EEPROM stores per-channel calibration constants. The wide 2.0-5.5 V VDD range supports both 3.3 V and 5 V analog front-ends, and NanoWatt Sleep mode lets battery-backed remote sensors idle at microamp currents between transmissions.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16F818T-I/SSTSL — 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 | PIC16F818T-I/SS | PIC16F818-I/SS | PIC16F818T-I/MLTSL | PIC16F88-I/SS | PIC16F819-I/SS |
|---|---|---|---|---|---|---|
| Package | 20-pin SSOP | 20-pin SSOP - same | 20-pin SSOP - same | 20-pin SSOP - same | 20-pin SSOP - same | 20-pin SSOP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 1.75 KB | 1.75 KB | 1.75 KB | 1.75 KB | 7 KB (+300%) | 3.5 KB (+100%) |
| Data SRAM | 128 B | 128 B | 128 B | 128 B | 368 B (+188%) | 256 B (+100%) |
| Data EEPROM | 128 B | 128 B | 128 B | 128 B | 256 B (+100%) | 256 B (+100%) |
| CPU Speed | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Operating Voltage | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V |
| ADC | 10-bit, 5 ch | 10-bit, 5 ch | 10-bit, 5 ch | 10-bit, 5 ch | 10-bit, 7 ch (+40%) | 10-bit, 5 ch |
| I/O Pins | 16 | 16 | 16 | 16 | 16 | 16 |
Bảo phân biệt quan trọng
- Flash-based reprogrammability with ICSP (vsPIC16F84A)
- On-chip 10-bit ADC eliminates external converter (vsPIC16F628)
- NanoWatt Technology for battery-friendly Sleep (vsPIC16F88)
- Cost-optimized 1.75 KB Flash vs larger siblings (vsPIC16F819)
Ghi chú thiết kế
Place a 100 nF X7R decoupling capacitor within 5 mm of the VDD pin (pin 20) and a second 100 nF near AVSS/AVDD (pins 7-8) for analog supply noise suppression. Estimated: at 20 MHz / 5 V active, VDD current is ~5-10 mA; add a 10 uF bulk cap if the supply trace exceeds 50 mm. The 2.0-5.5 V range allows direct 3.3 V or 5 V rails without level shifters.
Reserve ICSP pins RB6/PGC and RB7/PGD (bits 6 and 7 of PORTB) for in-circuit serial programming access - do not place series resistors above ~100 ohm or buffers that block programming voltages. MCLR (pin 1) needs a 10 kohm pull-up to VDD and a 100 nF cap to ground for reset; for ICSP, add a diode or resistor network that allows VPP (~13 V) to override the pull-up without back-driving the rest of the circuit.
Do not exceed 5.5 V on VDD - the PIC16F818 is not 5 V tolerant above spec. Ensure the ADC reference (VREF+/VREF-) is properly decoupled; floating references produce noisy ADC readings. When migrating code from PIC16F84A or PIC16C7x baselines, review the configuration-word defaults - the enhanced mid-range core has different oscillator and watchdog defaults that can leave the device unconfigured if the configuration bits are not explicitly programmed.
Estimated: at 20 MHz, 5 V and 10 mA active current, dissipation is ~50 mW - well within SSOP-20 thermal limits (theta_JA ~85 C/W typical for SSOP). For continuous 85C ambient operation, derate by ~1.2 mW/C. NanoWatt Sleep mode drops current to <1 uA typical, so thermal concerns are negligible in duty-cycled battery designs.
Thông tin tuân thủ
RoHS compliant per Microchip product page. Industrial temperature grade only; not AEC-Q100 qualified - select a Q-suffixed variant for automotive designs.
