PIC16F818T-E/SS - 20MHz 8-Bit Flash MCU, SSOP-20 | Microchip
料号： PIC16F818T-E/SS ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $4.36 | $4.36 |
| 10 | $3.93 | $39.30 |
| 100 | $3.5 | $350.00 |
| 500 | $3.15 | $1,575.00 |
| 1,000 | $2.83 | $2,830.00 |
| 3,000 | $2.55 | $7,650.00 |
PIC16F818T-E/SS 概述
What is a mid-range PIC microcontroller? A mid-range PIC16 microcontroller is an 8-bit RISC-based Flash MCU from Microchip's PIC16 family that sits between the baseline PIC10/12/16 devices and the enhanced PIC18 family. It typically offers 35 single-word instructions, multiple oscillator modes, integrated analog peripherals (ADC, comparators), and nanoWatt Technology for low-power sleep modes. Within the system hierarchy, the PIC16 family belongs to Microcontrollers -> Integrated Circuits -> Semiconductors, and serves as a versatile workhorse for embedded control in industrial, consumer, and automotive body applications.
Key features of the PIC16F818T-E/SS include a wide operating voltage range of 2.0 V to 5.5 V (extended range up to 5.5 V supported here), an internal 8 MHz oscillator, 10-bit ADC with up to 5 channels, one 8-bit and one 16-bit timer, nanoWatt power management with multiple sleep modes, and an ICD (In-Circuit Debugger) interface. The 'E' temperature grade (-40C to +125C) and 'T' tape-and-reel suffix suit industrial and high-volume manufacturing.
The PIC16F818T-E/SS shares a peripheral set with the PIC16F819 (which doubles program memory to 3.5 KB) and the PIC16F88 (which adds an enhanced USART and CCP module). It is upward instruction-set compatible with PIC16C7x, PIC16C62xA, PIC16C5X, and PIC12CXXX devices, easing migration from legacy designs.
Typical applications include sensor interface boards, small motor control, battery chargers, white goods control, HVAC fan controllers, security keypads, LED drivers, and general-purpose logic replacement. The wide temperature range and nanoWatt modes make it well suited for always-on industrial sensor nodes.
When designing with the PIC16F818T-E/SS, choose between the internal 8 MHz oscillator (lower BOM cost) and an external crystal (higher timing accuracy) based on whether UART baud-rate precision is required. Place decoupling capacitors (100 nF + 10 uF) as close as possible to VDD/VSS pins and respect the MCLR pin's VIL/VIH thresholds when used in noisy environments.
直接替换替代料： PIC16F818T-E/SS ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： PIC16F818T-E/SS （相同外形与封装尺寸） ——差异在于 ADC, Internal Oscillator, Program Memory (Flash), Core Architecture, Operating Temperature.
快速对比工具——选择替代料号进行并排对比：
PIC16F818-E/SS
✅ 直接替换📋 参考替代料（不在目录中）
PIC16F818T-I/SS
✅ 直接替换✓ 有现货
$1.92 / 个
查看数据手册 →PIC16F819T-E/SS
✅ 直接替换✓ 有现货
$2.15 / 个
查看数据手册 →PIC16F88-I/SS
✅ 直接替换✓ 有现货
$3.08 / 个
查看数据手册 →PIC16F818T-E/SSVAO
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
PIC16F818-I/SS
✅ 直接替换✓ 有现货
$2.02 / 个
查看数据手册 →PIC16F818T-E/SS 最大额定值与电气特性
| Product Family | PIC16F (PIC mid-range 8-bit) |
| Core Architecture | 8-bit RISC (35 single-word instructions) |
| Program Memory (Flash) | 1.75 KB (1K x 14 words) |
| Data EEPROM | 128 bytes |
| Data SRAM | 128 bytes |
| Maximum CPU Clock | 20 MHz (200 ns instruction cycle) |
| Supply Voltage (VDD) | 2.0 V to 5.5 V |
| I/O Pins | 16 |
| ADC | 10-bit, up to 5 channels |
| Timers | 1 x 8-bit, 1 x 16-bit |
| Internal Oscillator | 8 MHz |
| 工作温度 | -40C to +125C (E grade, extended) |
| 封装 | 20-pin SSOP (5.30 mm body width) |
| 安装类型 | Surface Mount |
| MSL 等级 | 1 (unlimited floor life) |
| Power-Saving Modes | nanoWatt Technology (multiple sleep modes) |
| In-Circuit Debug | ICD-capable |
| RoHS 状态 | Compliant |
PIC16F818T-E/SS 引脚配置
| 引脚 1 | RA0/AN0 — Digital I/O / Analog input channel 0 |
| 引脚 2 | RA1/AN1 — Digital I/O / Analog input channel 1 |
| 引脚 3 | RA2/AN2/VREF- — Digital I/O / Analog input channel 2 / ADC negative reference |
| 引脚 4 | RA3/AN3/VREF+ — Digital I/O / Analog input channel 3 / ADC positive reference |
| 引脚 5 | RA4/AN4/T0CKI — Digital I/O / Analog input channel 4 / Timer0 clock input |
| 引脚 6 | RA5/AN5/SS/HLVDIN — Digital I/O / Analog input channel 5 / SPI slave select / High/Low-Voltage Detect input |
| 引脚 7 | RA6/OSC2/CLKO — Digital I/O / Oscillator crystal output / Clock output |
| 引脚 8 | RA7/OSC1/CLKI — Digital I/O / Oscillator crystal input / Clock input |
| 引脚 9 | RE3/MCLR/VPP — Digital input / Master Clear reset (active-low) / Programming voltage |
| 引脚 10 | VSS — Ground reference |
| 引脚 11 | VDD — Positive supply voltage (2.0 V to 5.5 V) |
| 引脚 12 | RB0/INT — Digital I/O / External interrupt input |
| 引脚 13 | RB1 — Digital I/O |
| 引脚 14 | RB2 — Digital I/O |
| 引脚 15 | RB3/PGM — Digital I/O / Low-voltage ICSP programming entry |
| 引脚 16 | RB4 — Digital I/O |
| 引脚 17 | RB5 — Digital I/O |
| 引脚 18 | RB6/PGC — Digital I/O / In-Circuit Debugger clock |
| 引脚 19 | RB7/PGD — Digital I/O / In-Circuit Debugger data |
| 引脚 20 | VDD — Positive supply voltage (tied to pin 11) |
典型应用
PIC16F818T-E/SS 适用于 7 应用s: Industrial Sensor Interface Board, Small BLDC Fan Motor Controller, Battery Charger Controller (Lead-Acid / Li-Ion), Security Keypad / Access Control Module, White Goods Control Board (Washer / Dishwasher), HVAC Fan / Blower Speed Controller, General-Purpose Logic Replacement Board.
Industrial Sensor Interface Board
The PIC16F818T-E/SS is well-suited for industrial 4-20 mA sensor interface boards that digitize analog signals from pressure, temperature, or flow transducers. Its 10-bit ADC with up to 5 input channels handles multiple sensor inputs simultaneously, while the 20 MHz CPU clock provides sufficient bandwidth for digital filtering and linearization calculations. The 2.0-5.5 V VDD range supports both 3.3 V and 5 V analog front ends, and the E temperature grade (-40C to +125C) ensures reliable operation in factory-floor enclosures. nanoWatt sleep modes reduce quiescent current below 1 uA for battery-backed loop-powered designs.
推荐
Small BLDC Fan Motor Controller
In small brushless DC (BLDC) fan motor controllers for HVAC or PC cooling, the PIC16F818T-E/SS provides the timing and ADC resources needed for sensorless or Hall-sensor commutation. The 16-bit timer captures Hall-sensor transitions with microsecond resolution at 20 MHz CPU clock, while the 10-bit ADC reads back-EMF for sensorless control algorithms. PWM generation through the CCP-equivalent Compare module drives the gate driver FETs at 25 kHz switching frequency. The 1.75 KB Flash accommodates sensorless start-up ramp tables and the 128-byte SRAM holds the 6-step commutation state machine.
推荐
Battery Charger Controller (Lead-Acid / Li-Ion)
The PIC16F818T-E/SS is appropriate for multi-stage battery charger controllers in portable equipment, e-bike chargers, and UPS backup units. Its 10-bit ADC monitors battery voltage and charge current with adequate resolution for CC/CV transition control, while the 16-bit timer measures charge time and the 8-bit timer triggers PWM for buck-converter regulation. The wide 2.0-5.5 V VDD range allows direct operation from a 4-cell NiMH pack or with a small LDO from a 12 V lead-acid rail. EEPROM stores charge-cycle counters and calibration parameters across 100k erase/write cycles per datasheet.
推荐
Security Keypad / Access Control Module
For security keypads, PIN-entry access controllers, and door-strike controllers, the PIC16F818T-E/SS provides reliable 8-bit control with low standby current. The 16 digital I/O pins directly drive a 4x4 matrix keypad scan plus LED indicators and a relay or FET output for the door strike. The 128-byte EEPROM stores up to 50 user PINs with default Microchip endurance of 1M erase/write cycles. nanoWatt sleep mode drops quiescent current below 1 uA, allowing year-long battery operation. The E temperature grade handles outdoor mounting in harsh climates.
推荐
White Goods Control Board (Washer / Dishwasher)
In white-goods control boards for washing machines, dishwashers, and ovens, the PIC16F818T-E/SS manages user-interface inputs, motor-driver signaling, and sensor feedback. The 16-bit timer drives TRIAC phase-angle control for AC loads such as pumps and valves, while the 10-bit ADC reads temperature sensors (NTC) and water-level probes. The 1.75 KB Flash fits typical wash-cycle state machines, and the 128-byte EEPROM stores user presets and fault logs. The E temperature grade tolerates the high ambient inside appliance cabinets, and the SSOP-20 footprint suits compact PCB designs.
推荐
HVAC Fan / Blower Speed Controller
The PIC16F818T-E/SS is a good fit for HVAC fan and blower speed controllers that drive shaded-pole or PSC motors via TRIAC phase-angle dimming. The 16-bit timer generates the zero-crossing synchronization pulse with sub-microsecond accuracy, and the 10-bit ADC reads tachometer feedback for closed-loop RPM regulation. nanoWatt sleep mode enables always-on thermostat compatibility with negligible standby power. The wide operating voltage (2.0-5.5 V) and E temperature grade handle 24 VAC transformer-rail environments when paired with a small rectifier/regulator front end.
推荐
General-Purpose Logic Replacement Board
The PIC16F818T-E/SS excels as a 'soft-logic' replacement for legacy 74HC-series glue-logic boards, integrating multiple gates, latches, and timers into a single chip. The 16 I/O pins handle up to 16 discrete signals, and the 20 MHz CPU clock delivers sub-microsecond response latency to interrupt-driven I/O. Programmable behavior - debounce, sequencing, pulse-stretching - replaces dozens of discrete components, reducing PCB area and BOM cost. The ICD interface allows in-circuit firmware updates without removing the chip from the board.
推荐
推荐产品汇总
工程参考数据： PIC16F818T-E/SS ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | PIC16F818-E/SS | PIC16F818T-I/SS | PIC16F819T-E/SS | PIC16F88-I/SS | PIC16F818T-E/SSVAO |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | SSOP-20 (5.30 mm) | SSOP-20 - same | SSOP-20 - same | SSOP-20 - same | SSOP-20 - same | SSOP-20 - same |
| Flash Program Memory | 1.75 KB (1K x 14) | 1.75 KB - same | 1.75 KB - same | 3.5 KB (+100%) | 7.2 KB (+311%) | 1.75 KB - same |
| Data SRAM | 128 bytes | 128 B - same | 128 B - same | 256 B (+100%) | 368 B (+188%) | 128 B - same |
| Data EEPROM | 128 bytes | 128 B - same | 128 B - same | 256 B (+100%) | 256 B (+100%) | 128 B - same |
| Max CPU Clock | 20 MHz | 20 MHz - same | 20 MHz - same | 20 MHz - same | 20 MHz - same | 20 MHz - same |
| Operating Temperature | -40C to +125C (E) | -40C to +125C (E) - same | -40C to +85C (I) - narrower | -40C to +125C (E) - same | -40C to +85C (I) - narrower | -40C to +125C (E) - same |
| ADC Resolution | 10-bit | 10-bit - same | 10-bit - same | 10-bit - same | 10-bit (plus 2 comparators) - same | 10-bit - same |
| I/O Pins | 16 | 16 - same | 16 - same | 16 - same | 16 - same | 16 - same |
| Automotive Grade | No (industrial E grade) | No - same | No - same | No - same | No - same | Yes (PPAP/automotive) - better |
关键差异点
- Extended -40C to +125C temperature grade (E suffix) for harsh industrial environments （对比 PIC16F818T-I/SS)
- Tape-and-reel packaging (T suffix) for high-volume SMT assembly （对比 PIC16F818-E/SS)
- 1.75 KB Flash sufficient for typical mid-range PIC16 firmware without over-provisioning cost （对比 PIC16F88-I/SS)
- nanoWatt Technology with multiple sleep modes for battery-backed designs （对比 PIC16F88-I/SS)
设计说明
Place a 100 nF decoupling capacitor as close as possible to each VDD pin (pins 11 and 20 must be tied together) and a single 10 uF bulk capacitor at the board's power-entry point. The PIC16F818T-E/SS can operate from 2.0 V to 5.5 V; if powered from a switching regulator, add a ferrite bead and 1 uF cap on the analog AVdd if precision ADC readings are required. The internal voltage regulator requires VDD >= 2.0 V at all times during operation - dropping below this causes undefined behavior.
Keep the ICSP/ICD pins (RB6/PGC, RB7/PGD, MCLR/VPP) accessible on the PCB. Microchip recommends a 6-pin header (0.1-inch pitch) connected to these three pins plus VDD, VSS, and AUX for in-circuit programming and debugging. Do not place large capacitors directly on PGC/PGD, as they will slow the ICSP clock. Trace lengths to the ICSP connector should be under 50 mm to avoid signal integrity issues during programming.
When using the 20 MHz external crystal mode, place the crystal and its two loading capacitors (typically 15-33 pF) within 5 mm of the OSC1/OSC2 pins. Keep the crystal traces short and away from switching signals. For EMI-sensitive designs, use a 4-layer PCB with a solid ground plane beneath the crystal traces. The internal 8 MHz oscillator is sufficient for UART at standard baud rates up to 38.4 kbps with the high-baud-rate enable bit (BRGH=1).
Do not leave the MCLR pin floating - tie it to VDD through a 10 kohm pull-up resistor, or directly to VDD if not using external reset. The PIC16F818T-E/SS has CONFIG register settings for MCLR enable/disable; if disabled, the pin becomes a digital input (RE3). Watch the configuration-word LVP (Low-Voltage Programming) bit: if enabled, RB3/PGM becomes dedicated and cannot be used as general I/O without disabling LVP first.
合规信息
RoHS and REACH compliant per Microchip product declaration; Pb-free SSOP-20 package; MSL 1 (unlimited floor life). AEC-Q100 not qualified - choose PIC16F818T-E/SSVAO for automotive PPAP. Halogen-free per JESD709.
