PIC16F818T-E/SS - 20MHz 8-Bit Flash MCU, SSOP-20 | Microchip
MPN: PIC16F818T-E/SS β Active| Qty | Unit Price | Extended |
|---|---|---|
| 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 Overview
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.
Drop-in alternatives for PIC16F818T-E/SS β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PIC16F818T-E/SS (same form factor and footprint) β differing in Core Architecture, Data EEPROM, Data SRAM, Operating Temperature, Package.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PIC16F818-E/SS
β Drop-Inπ Reference alternative (not in catalog)
PIC16F818T-I/SS
β Drop-Inβ In Stock
$1.92 / Unit
View Datasheet βPIC16F819T-E/SS
β Drop-Inβ In Stock
$2.15 / Unit
View Datasheet βPIC16F88-I/SS
β Drop-Inπ Reference alternative (not in catalog)
PIC16F818T-E/SSVAO
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
PIC16F818-I/SS
β Drop-Inβ In Stock
$1.92 / Unit
View Datasheet βPIC16F818T-E/SS Maximum Ratings & Electrical Characteristics
| 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 |
| Operating Temperature | -40C to +125C (E grade, extended) |
| Package | 20-pin SSOP (5.30 mm body width) |
| Mounting Type | Surface Mount |
| MSL Level | 1 (unlimited floor life) |
| Power-Saving Modes | nanoWatt Technology (multiple sleep modes) |
| In-Circuit Debug | ICD-capable |
| RoHS Status | Compliant |
PIC16F818T-E/SS Pin Configuration
| Pin 1 | RA0/AN0 β Digital I/O / Analog input channel 0 |
| Pin 2 | RA1/AN1 β Digital I/O / Analog input channel 1 |
| Pin 3 | RA2/AN2/VREF- β Digital I/O / Analog input channel 2 / ADC negative reference |
| Pin 4 | RA3/AN3/VREF+ β Digital I/O / Analog input channel 3 / ADC positive reference |
| Pin 5 | RA4/AN4/T0CKI β Digital I/O / Analog input channel 4 / Timer0 clock input |
| Pin 6 | RA5/AN5/SS/HLVDIN β Digital I/O / Analog input channel 5 / SPI slave select / High/Low-Voltage Detect input |
| Pin 7 | RA6/OSC2/CLKO β Digital I/O / Oscillator crystal output / Clock output |
| Pin 8 | RA7/OSC1/CLKI β Digital I/O / Oscillator crystal input / Clock input |
| Pin 9 | RE3/MCLR/VPP β Digital input / Master Clear reset (active-low) / Programming voltage |
| Pin 10 | VSS β Ground reference |
| Pin 11 | VDD β Positive supply voltage (2.0 V to 5.5 V) |
| Pin 12 | RB0/INT β Digital I/O / External interrupt input |
| Pin 13 | RB1 β Digital I/O |
| Pin 14 | RB2 β Digital I/O |
| Pin 15 | RB3/PGM β Digital I/O / Low-voltage ICSP programming entry |
| Pin 16 | RB4 β Digital I/O |
| Pin 17 | RB5 β Digital I/O |
| Pin 18 | RB6/PGC β Digital I/O / In-Circuit Debugger clock |
| Pin 19 | RB7/PGD β Digital I/O / In-Circuit Debugger data |
| Pin 20 | VDD β Positive supply voltage (tied to pin 11) |
Typical Applications
PIC16F818T-E/SS is suitable for 7 applications: 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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F818T-E/SS β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | 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 |
Key Differentiators
- Extended -40C to +125C temperature grade (E suffix) for harsh industrial environments (vs PIC16F818T-I/SS)
- Tape-and-reel packaging (T suffix) for high-volume SMT assembly (vs PIC16F818-E/SS)
- 1.75 KB Flash sufficient for typical mid-range PIC16 firmware without over-provisioning cost (vs PIC16F88-I/SS)
- nanoWatt Technology with multiple sleep modes for battery-backed designs (vs PIC16F88-I/SS)
Design Notes
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.
Compliance Information
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.
