PIC16F818T-I/SS - 8-bit PIC MCU, 20MHz, 1.75KB Flash, SSOP-20 | Microchip
Teilenummer: PIC16F818T-I/SS ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $2.95 | $2,95 |
| 10 | $2.66 | $26,60 |
| 100 | $2.39 | $239,00 |
| 500 | $2.15 | $1.075,00 |
| 1.000 | $1.92 | $1.920,00 |
PIC16F818T-I/SS Übersicht
A PIC microcontroller (Programmable Intelligent Computer) is a family of Harvard-architecture 8/16/32-bit microcontrollers built around a精简指令集 (RISC) core with separate program and data buses. Within Microchip's hierarchy it sits at the PIC16 mid-range tier (PIC10/12/16/18/24/32 families), positioned between baseline 8-pin PIC10/PIC12 devices and high-performance PIC18/PIC24/PIC32 devices. The mid-range PIC16F core is the workhorse family for cost-sensitive embedded control, known for deterministic interrupt response and a small, easy-to-learn instruction set (35 single-word instructions for the PIC16F818).
The PIC16F818 integrates 16 digital I/O pins, an 8MHz internal oscillator, 10-bit ADC, two PWM modules, a hardware USART, I2C and SPI peripherals, brown-out reset, power-on reset, watchdog timer, and Microchip's nanoWatt power-management technology for low-power sleep modes. It is code- and pin-compatible with the larger PIC16F819 (2KB Flash / 256B SRAM) and shares peripherals with the 18-pin PIC16F88.
Architecturally, the device uses a 14-bit instruction word and a Harvard bus, giving single-cycle instruction fetch with separate program Flash and data SRAM buses. This separation eliminates von Neumann fetch-decode bottlenecks and is the foundation of the PIC family's deterministic interrupt latency. The 8MHz internal RC oscillator can be software-tuned via the OSCTUNE register, eliminating external crystals in many cost-sensitive designs.
Typical applications include consumer appliance control, sensor signal conditioning, low-end motor control loops, battery chargers, LED lighting controllers, and educational/hobbyist platforms where PIC16F mid-range familiarity is preferred. The compact SSOP-20 footprint and industrial temperature grade suit space-constrained commercial and industrial products.
When migrating from PIC16C5X/PIC16C62xA/PIC16C7x/PIC12CXXX designs, the PIC16F818 retains socket-and-code compatibility for most peripheral functions while adding Flash reprogrammability and nanoWatt low-power features.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet - including guidance on internal-oscillator accuracy, ICSP programming pinout, and a same-package migration path to PIC16F819 for designers who later need additional program memory.
Drop-in-Alternativen für PIC16F818T-I/SS – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit PIC16F818T-I/SS (gleiche Bauform und Footprint) – abweichend in Package, Core Architecture, ADC, Internal Oscillator, Operating Temperature.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
PIC16F818-I/SS
✅ Drop-In✓ Auf Lager
$2.02 / Stück
Datenblatt ansehen →PIC16F818T-E/SS
✅ Drop-In✓ Auf Lager
$2.55 / Stück
Datenblatt ansehen →PIC16F818-E/SS
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
PIC16F819T-I/SS
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
PIC16F819T-E/SS
✅ Drop-In✓ Auf Lager
$2.15 / Stück
Datenblatt ansehen →PIC16F818T-I/SS Grenzwerte & elektrische Eigenschaften
| Core Processor | PIC |
| Core Size | 8-bit |
| Core Series | PIC16 |
| Maximum CPU Speed | 20 MHz |
| Instruction Cycle Time | 200 ns |
| Program Memory Type | Flash |
| Program Memory Size | 1.75 KB (1K x 14) |
| Data RAM (SRAM) | 128 B |
| EEPROM Data Memory | 128 B |
| Number of I/O Pins | 16 |
| Package Type | SSOP-20 (5.30 mm body width) |
| Package Code | SS |
| Montageart | Surface Mount |
| Packaging | Tape & Reel (TR) |
| Betriebstemperaturbereich | -40 C to +85 C (Industrial) |
| Supply Voltage Range | 2.0 V to 5.5 V |
| Internal Oscillator | 8 MHz (software-tunable via OSCTUNE) |
| Connectivity Peripherals | I2C, SPI, USART |
| On-chip Peripherals | Brown-out Detect/Reset, POR, PWM, WDT |
| Number of PWM Channels | 2 (10-bit) |
| ADC | 10-bit |
| Instruction Set Size | 35 single-word instructions |
| Upward Compatible With | PIC16C7x, PIC16C62xA, PIC16C5X, PIC12CXXX |
| RoHS-Status | Compliant |
| Lead-free / Halogen-free | Yes (per Microchip RoHS statement) |
PIC16F818T-I/SS Pin-Konfiguration
| Pin 1 | MCLR/VPP/RE3 — Master Clear (reset) input / programming voltage input / digital I/O |
| Pin 2 | RA0/AN0 — PORTA bit 0 / analog input channel 0 |
| Pin 3 | RA1/AN1 — PORTA bit 1 / analog input channel 1 |
| Pin 4 | RA2/AN2/VREF- — PORTA bit 2 / analog input channel 2 / ADC negative reference |
| Pin 5 | RA3/AN3/VREF+ — PORTA bit 3 / analog input channel 3 / ADC positive reference |
| Pin 6 | RA4/AN4/T0CKI — PORTA bit 4 / analog input channel 4 / Timer0 clock input |
| Pin 7 | RA5/AN5/SS — PORTA bit 5 / analog input channel 5 / SPI slave select |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSC1/RA7 — Oscillator crystal input / PORTA bit 7 |
| Pin 10 | OSC2/RA6 — Oscillator crystal output / PORTA bit 6 |
| Pin 11 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| Pin 12 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 PWM output |
| Pin 13 | RC2/CCP1 — PORTC bit 2 / CCP1 PWM output |
| Pin 14 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Pin 15 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Pin 16 | RC5/SDO — PORTC bit 5 / SPI data out |
| Pin 17 | RC6/TX/CK — PORTC bit 6 / USART transmit / USART clock |
| Pin 18 | RC7/RX/DT — PORTC bit 7 / USART receive / USART data |
| Pin 19 | RB6/PGC — PORTB bit 6 / ICSP clock input |
| Pin 20 | RB7/PGD — PORTB bit 7 / ICSP data I/O |
Typische Anwendungen
PIC16F818T-I/SS ist geeignet für 6 Anwendungs: Consumer Appliance Control (Washing Machines, Microwave Ovens), Battery-Powered Sensor Nodes (nanoWatt Sleep Modes), LED Lighting Controllers and DMX Decoders, Industrial Sensor Signal Conditioning, Low-End Motor Control (DC, Stepper, Small BLDC), Educational and Hobbyist Development Platforms.
Consumer Appliance Control (Washing Machines, Microwave Ovens)
The PIC16F818T-I/SS suits consumer appliance control boards where cost dominates over raw performance: washing machine motor drivers, microwave oven keypads and timers, dishwasher control logic, and refrigerator user interfaces. The 16 digital I/O pins comfortably drive LED or seven-segment displays, button matrices, and triac/relay control lines for solenoid valves and heater elements, while the two 10-bit PWM channels deliver precise motor-speed control for brushless DC fans or universal motors. The industrial -40C to +85C rating covers the kitchen and laundry thermal envelope, and the 8MHz internal oscillator eliminates two external crystal pins and reduces BOM cost by ~$0.10-0.20 per board. Microchip's MPLAB X IDE free toolchain plus the PICkit 3/4 ICSP programmer enable rapid firmware iteration during the white-goods design cycle.
Empfohlen
Battery-Powered Sensor Nodes (nanoWatt Sleep Modes)
The PIC16F818T-I/SS's nanoWatt technology makes it well-suited for battery-powered wireless sensor endpoints including HVAC thermometers, irrigation soil-moisture probes, and battery-backed security sensors. Sleep current drops to roughly 50nA typical with the watchdog timer and RTCC active, allowing coin-cell-powered designs to achieve multi-year battery life when the CPU wakes only on a periodic interrupt (e.g., once per minute) or external edge interrupt. The integrated 10-bit ADC reads thermistor, photocell, or other analog sensors without external signal conditioning, and the 128-byte EEPROM stores calibration constants and rolling counters that survive power cycles. At 20MHz active the device still draws only a few mA, balancing measurement bursts and communication windows efficiently.
Empfohlen
LED Lighting Controllers and DMX Decoders
The PIC16F818T-I/SS integrates two 10-bit PWM channels plus a hardware USART, which is sufficient for entry-level LED lighting controllers driving RGB or RGBW strips via MOSFET driver stages, or for DMX-512 slave decoders receiving dimming commands over a 250kbps RS-485 link. The PWM hardware generates flicker-free dimming across the full 0-100% range without CPU overhead, while the USART handles DMX break detection and packet framing in interrupt service routines. The 20MHz instruction cycle supports 8-bit PWM resolution at >1kHz refresh - well above the 100Hz threshold for human-flicker perception. The 128-byte EEPROM stores DMX addresses and curve profiles that survive power cycles, simplifying commissioning.
Empfohlen
Industrial Sensor Signal Conditioning
Industrial signal-conditioning front-ends - 4-20mA loop transmitters, RTD/thermocouple amplifiers, and bridge sensor digitizers - can leverage the PIC16F818T-I/SS's 10-bit ADC, I2C/SPI connectivity, and 2.0V to 5.5V supply range. The PIC16F818 reads the conditioned analog signal, applies digital filtering and linearization in firmware, and outputs the processed value over I2C to a host PLC or SPI to a local display. The industrial -40C to +85C temperature grade covers factory-floor environments, and the brown-out reset and watchdog timer protect against the voltage transients common on 24V industrial bus rails. The internal 8MHz oscillator accuracy is adequate for slow-changing process signals (<100Hz bandwidth) where timing precision is not critical.
Empfohlen
Low-End Motor Control (DC, Stepper, Small BLDC)
The PIC16F818T-I/SS's two 10-bit PWM channels plus four additional CCP/timer-driven I/O make it suitable for low-end brushed DC motor speed control, unipolar stepper motor sequencing, and small sensorless BLDC fans in 12V-24V systems. The PWM outputs drive external half-bridge drivers (e.g., DRV8870, L293D) while the ADC reads back current-sense amplifier outputs for closed-loop torque or speed regulation. Stepper sequencing can run off timer interrupts at sub-microsecond resolution thanks to the 200ns instruction cycle. The ICSP programming header permits in-system firmware tuning of PID coefficients during prototype bring-up, and the 128-byte EEPROM stores trim values and motor profiles per axis.
Empfohlen
Educational and Hobbyist Development Platforms
The PIC16F818T-I/SS is a popular educational MCU because it combines a forgiving PIC16 mid-range instruction set (only 35 single-word instructions to learn) with enough peripherals - 16 I/O, ADC, PWM, USART, I2C, SPI - for genuine embedded-systems coursework. University EE/CE programs and makerspace workshops choose the PIC16F818 for first-year microcontroller labs because MPLAB X IDE, XC8 compiler, and PICkit 3/4 programmer are all free for non-commercial use. The SSOP-20 package fits standard 0.1-inch-pitch breakout boards with breakout adapter PCBs, and the wide 2.0V-5.5V supply range lets students power boards from USB, 3.3V LDO, or 2xAA batteries interchangeably during labs.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für PIC16F818T-I/SS – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | PIC16F818-I/SS | PIC16F818T-E/SS | PIC16F818-E/SS | PIC16F819T-I/SS | PIC16F819T-E/SS |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | SSOP-20 | SSOP-20 (same) | SSOP-20 (same) | SSOP-20 (same) | SSOP-20 (same) | SSOP-20 (same) |
| Program Memory (Flash) | 1.75 KB (1K x 14) | 1.75 KB | 1.75 KB | 1.75 KB | 3.5 KB (2K x 14) | 3.5 KB (2K x 14) |
| Data RAM (SRAM) | 128 B | 128 B | 128 B | 128 B | 256 B | 256 B |
| EEPROM | 128 B | 128 B | 128 B | 128 B | 256 B | 256 B |
| Maximum CPU Speed | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Operating Temperature Range | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +125 C (Extended) | -40 C to +125 C (Extended) | -40 C to +85 C (Industrial) | -40 C to +125 C (Extended) |
| Packaging Format | Tape & Reel (TR) | Tube | Tape & Reel | Tube | Tape & Reel | Tape & Reel |
Wichtigste Unterscheidungsmerkmale
- Tape-and-reel packaging optimized for high-volume SMT production (vs. PIC16F818-I/SS)
- Extended temperature grade variant available for harsh environments (vs. PIC16F818T-E/SS)
- Drop-in memory upgrade path to PIC16F819 family (vs. PIC16F819T-I/SS)
Designhinweise
Do not leave the MCLR pin floating. The PIC16F818T-I/SS requires MCLR tied to VDD through a 10k pull-up resistor (or directly to VDD for applications not needing external reset). A floating MCLR pin causes erratic resets and unreliable startup, especially in electrically noisy environments like motor control or relay-driven appliances. For ICSP programming, MCLR must be accessible to the programmer via a 10k isolation resistor or direct connection through the ICSP header.
Place a 100nF decoupling capacitor as close as possible to the VDD pin (pin 19) and another on the AVdd-related supply trace if separate analog supply pins are used. For designs using the internal oscillator only, no external crystal load capacitors are needed; this saves two PCB pads and reduces BOM cost. Keep the ICSP pins (RB6/PGC and RB7/PGD) accessible on a 5-pin header with VPP, VDD, VSS routed to the connector for in-circuit programming without removing the MCU from the board.
For battery-powered designs leveraging nanoWatt sleep modes, switch off unused peripherals via the peripheral disable registers (PCON, CMCON, ADCON0) before entering Sleep instruction. The brown-out reset (BOR) should be enabled via the configuration bits to protect EEPROM contents during voltage dips - critical for designs storing calibration constants or count values in the 128-byte EEPROM. Wake from sleep via Watchdog Timer overflow, external interrupt on RB0, or peripheral interrupt from the ADC/comparator modules.
Compliance-Informationen
RoHS and REACH compliant per Microchip product page. AEC-Q100 not qualified - for automotive AEC-Q100 qualified PIC16F818 variants consult Microchip's automotive-grade portfolio. Lead-free and halogen-free per Microchip environmental compliance statement.
