PIC16F627-20E/P - 8-bit 20MHz Flash MCU 1.75KB | Microchip
MPN: PIC16F627-20E/P ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.2 | $3.20 |
| 10 | $2.88 | $28.80 |
| 100 | $2.55 | $255.00 |
| 500 | $2.2 | $1,100.00 |
| 1,000 | $1.95 | $1,950.00 |
PIC16F627-20E/P Overview
What is a PIC mid-range microcontroller? A PIC microcontroller is a small, low-power programmable computer-on-a-chip built around a Harvard architecture (separate program and data buses) using a RISC instruction set. Microcontrollers (MCUs) sit at the bottom of the embedded-computing hierarchy: MCU -> microcontroller -> embedded controller -> semiconductor IC. The mid-range PIC16 family executes one instruction per clock cycle (200ns at 20MHz), making it faster than classical 8051-class parts while keeping a small instruction footprint of only 35 single-word instructions, ideal for cost-sensitive embedded control.
Key features of the PIC16F627-20E/P include an integrated 4MHz precision internal RC oscillator (no external crystal required for many applications), two analog comparators with a programmable voltage reference, a USART for asynchronous serial communication, a 16-bit timer/counter with capture/compare/PWM, an 8-bit timer/counter, an enhanced capture/compare/PWM module, and 11 digital I/O pins multiplexed with peripheral functions. Brown-out detect, power-on reset, watchdog timer with its own dedicated RC oscillator, and programmable weak PORTB pull-ups are all on-chip.
Architecturally, the device uses a 14-bit instruction word, an 8-bit data path, a hardware multiply (8x8 in one cycle on this family), and a 2-level hardware stack. The internal 4MHz oscillator can be trimmed in software via the OSCCAL register, and an external clock or crystal is supported via the OSC1/OSC2 pins. The ICSP (In-Circuit Serial Programming) interface uses RB6/RB7 and lets engineers program the device in-place on the PCB.
Typical applications include appliance control (washing machines, microwave ovens, coffee machines), automotive body modules (lighting, seat controllers, HVAC flaps), industrial sensor transmitters, IR remote controls, security alarm panels, and low-cost consumer electronics where a small pin count and modest flash/RAM footprint are sufficient. The extended temperature grade also makes it viable for outdoor and under-hood automotive subsystems.
A key design consideration is that the 4.5V-5.5V supply requirement rules out 3.3V-only designs; designers targeting lower voltages should consider PIC16F627A-I/P (3V-5.5V) or PIC16F88 variants. Watchdog timer should always be enabled in production firmware to recover from software lockups. Always configure the unused I/O pins as outputs low to minimize current consumption.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone Microchip datasheet, giving procurement and engineering teams a single decision-ready reference.
Drop-in alternatives for PIC16F627-20E/P — 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 PIC16F627-20E/P (same form factor and footprint) — differing in Operating Temperature, Package, Core Architecture, Timers, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F627-20/P
✅ Drop-In✓ In Stock
$1.74 / Unit
View Datasheet →PIC16F627A-I/P
✅ Drop-In✓ In Stock
$1.72 / Unit
View Datasheet →PIC16F628-20/P
✅ Drop-In✓ In Stock
$1.96 / Unit
View Datasheet →PIC16F627-04/P
✅ Drop-In✓ In Stock
$2.05 / Unit
View Datasheet →PIC16F627-20/SO
✅ Drop-In✓ In Stock
$1.83 / Unit
View Datasheet →PIC16F627-04E/P
✅ Drop-In✓ In Stock
$1.85 / Unit
View Datasheet →PIC16F627-20E/P Maximum Ratings & Electrical Characteristics
| Core | PIC16 mid-range 8-bit RISC |
| Instruction Set | 35 single-word instructions, 14-bit instruction width |
| Maximum Clock Frequency | 20 MHz |
| Instruction Cycle Time | 200 ns at 20 MHz |
| Program Memory (Flash) | 1.75 KB (1K x 14) |
| Data Memory (SRAM) | 224 bytes |
| Data EEPROM | 128 bytes |
| I/O Pins | 11 |
| Timers | 1 x 8-bit, 1 x 16-bit (CCP/ECCP) |
| Analog Comparators | 2 with programmable voltage reference |
| Communication | USART |
| Internal Oscillator | 4 MHz precision (OSCCAL software trimmable) |
| Supply Voltage (Vdd) | 4.5 V to 5.5 V |
| Operating Temperature | -40 C to +125 C (extended, "E" suffix) |
| Package | 18-pin PDIP ("/P") |
| Mounting Type | Through-Hole (DIP) |
| Programming Interface | ICSP via RB6/RB7 |
| Special Features | Brown-out detect, watchdog timer, POR, PWRT, OST |
| RoHS Status | Compliant (lead-free) |
| Lifecycle Status | Active |
PIC16F627-20E/P Pin Configuration
| Pin 1 | RA2 — Digital I/O port A bit 2 / analog comparator input |
| Pin 2 | RA3 — Digital I/O port A bit 3 / comparator input / Vref output |
| Pin 3 | RA4 — Digital I/O port A bit 4 / Timer0 clock input |
| Pin 4 | MCLR/Vpp — Master clear reset (active low) / programming voltage input |
| Pin 5 | Vss — Ground reference |
| Pin 6 | RB0/INT — Digital I/O port B bit 0 / external interrupt input |
| Pin 7 | RB1/RX/DT — Digital I/O port B bit 1 / USART RX / synchronous data |
| Pin 8 | RB2/TX/CK — Digital I/O port B bit 2 / USART TX / synchronous clock |
| Pin 9 | RB3/CCP1 — Digital I/O port B bit 3 / CCP1 PWM output |
| Pin 10 | RB4 — Digital I/O port B bit 4 |
| Pin 11 | RB5 — Digital I/O port B bit 5 |
| Pin 12 | RB6/PGC — Digital I/O port B bit 6 / ICSP clock |
| Pin 13 | RB7/PGD — Digital I/O port B bit 7 / ICSP data |
| Pin 14 | Vdd — Positive supply voltage (4.5V-5.5V) |
| Pin 15 | OSC2/CLKOUT — Oscillator crystal output / clock out |
| Pin 16 | OSC1/CLKIN — Oscillator crystal input / external clock input |
| Pin 17 | RA6/OSC2 — Digital I/O port A bit 6 / alternate oscillator output |
| Pin 18 | RA7/OSC1 — Digital I/O port A bit 7 / alternate oscillator input |
Typical Applications
PIC16F627-20E/P is suitable for 7 applications: Home Appliance Control, Automotive Body Electronics, Security and Alarm Panels, IR Remote Control Transmitters, Industrial Sensor Transmitters, Consumer Electronics Toys and Gadgets, HVAC Fan and Blower Controllers.
Home Appliance Control
The PIC16F627-20E/P fits washing machine, dishwasher, microwave oven, and coffee machine control boards where 5V rails, modest flash, and reliable extended-temperature operation are required. Its 20MHz instruction throughput executes the supervisory state machine fast enough to scan user keypads, drive relay/SSR outputs via the ECCP PWM, and read thermistor inputs through the on-chip comparators with programmable voltage reference. The 128-byte EEPROM stores user presets (cycle selection, clock time) without external NVRAM. The integrated 4MHz internal oscillator often eliminates an external crystal on cost-sensitive appliance boards. Extended -40C to +125C temperature rating supports unventilated enclosures near heating elements. The 18-pin PDIP is still preferred for hand-reworkable appliance service boards where technicians swap MCUs without hot-air rework stations.
Recommended
Automotive Body Electronics
For interior lighting controllers, seat-position memory modules, mirror-adjust drivers, and HVAC flap actuators, the PIC16F627-20E/P's extended -40C to +125C temperature grade and 5V rail compatibility match the typical automotive 12V nominal (post-regulator) environment. The 20MHz clock provides enough margin to debounce switch inputs while servicing a LIN-style slave protocol bit-banged on the USART, and the on-chip comparators handle current-sense feedback for motor short-circuit protection. Designers use the ECCP module to drive small DC motor PWMs or LED current regulators. Although this part is not formally AEC-Q100 qualified, the "E" extended-temp variant is widely used in non-safety body modules. For safety-critical modules (airbag, ABS), the PIC16F627A-E/P Q-grade equivalent should be selected instead.
Recommended
Security and Alarm Panels
The PIC16F627-20E/P is a workhorse for PIR motion-detector boards, door/window contact transmitters, and small alarm control panels that need extended-temperature operation and EEPROM-backed event logging. Its 224 bytes of SRAM buffer immediate sensor states while flash holds the supervision state machine, and the 128-byte EEPROM retains up to 64 alarm events across power cycles without external memory. The two on-chip comparators interface directly to PIR sensor analog front-ends, and the USART links to a downstream keypad or wireless module. The 4MHz internal oscillator keeps quiescent current low for battery-backed PIRs running on lithium primary cells. 18-pin PDIP remains the package of choice for through-hole security sensor boards where mechanical robustness matters.
Recommended
IR Remote Control Transmitters
Remote control handsets for TVs, set-top boxes, air conditioners, and ceiling fans leverage the PIC16F627-20E/P's 4MHz internal oscillator and ultra-low sleep current to deliver 6-12 months of battery life on two AAA cells. The on-chip USART or bit-banged GPIO generates the 38kHz/56kHz carrier modulation for RC5, NEC, or SIRC IR protocols, and the ECCP PWM can be used directly for precise carrier duty-cycle control. The 11 I/O pins comfortably matrix a 4x4 key keypad, while 128-byte EEPROM stores learned-code tables or model presets. The 18-pin PDIP and SOIC variants both fit within typical handset enclosures, and the 5V-only operation is acceptable because alkaline cells remain above 4.5V for most of their discharge curve.
Recommended
Industrial Sensor Transmitters
Loop-powered 4-20mA sensor transmitters, HVAC duct sensors, and small PLC expansion modules use the PIC16F627-20E/P for its extended temperature range and ability to run from a regulated 5V rail derived from a 24V industrial loop. The on-chip 10-bit ADC reference, two comparators, and programmable voltage reference support direct interfacing to bridge sensors, RTDs, and 0-10V analog inputs. The USART enables Modbus RTU slave communication on RS-485 transceivers, while the ECCP module drives 0-10V output stages via PWM filtering. Flash memory holds calibration coefficients and Modbus register maps; EEPROM stores non-volatile configuration. The PIC16F62X family is well-supported by Microchip's MPLAB X toolchain, making code reuse across product variants straightforward.
Recommended
Consumer Electronics Toys and Gadgets
Educational toys, novelty gadgets, LED light controllers, and small consumer appliances benefit from the PIC16F627-20E/P's combination of low unit cost, easy in-circuit programming, and tiny 18-pin PDIP footprint. The internal 4MHz oscillator removes the need for external timing components, reducing BOM cost for sub-$10 retail products. The ECCP and CCP modules drive RGB LEDs via PWM for color-mixing toys, and the on-chip comparators interface to simple analog sensors (touch pads, light sensors). The 128-byte EEPROM stores user settings such as color presets or game high scores. The PIC16F62X instruction set is widely documented in textbooks and online tutorials, making this MCU a popular choice for student and hobbyist projects transitioning from Arduino to bare PIC development.
Recommended
HVAC Fan and Blower Controllers
Variable-speed fan, blower, and small pump controllers for residential HVAC systems use the PIC16F627-20E/P to read thermistor inputs, drive TRIAC phase-control or PWM outputs, and implement soft-start profiles. The 20MHz clock executes PI control loops at sub-millisecond rates, smooth enough for quiet fan speed transitions, and the ECCP module generates 25kHz PWM for quiet motor drive. Extended -40C to +125C operation handles the temperature swings inside an air handler. The on-chip comparators detect zero-crossing for TRIAC firing and current limiting for fault protection. The 128-byte EEPROM stores user fan curves and last-set fan speed across power cycles. The 18-pin PDIP remains serviceable in field-replacement scenarios typical of HVAC technician workflows.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F627-20E/P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F627-20/P | PIC16F627A-I/P | PIC16F628-20/P | PIC16F627-04/P | PIC16F627-20/SO | PIC16F627-04E/P |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | PDIP-18 | PDIP-18 - same | PDIP-18 - same | PDIP-18 - same | PDIP-18 - same | SOIC-18 - surface mount | PDIP-18 - same |
| Maximum Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 4 MHz (-80%) | 20 MHz | 4 MHz (-80%) |
| Flash Program Memory | 1.75 KB | 1.75 KB | 1.75 KB | 3.5 KB (+100%) | 1.75 KB | 1.75 KB | 1.75 KB |
| SRAM | 224 bytes | 224 bytes | 224 bytes | 224 bytes | 224 bytes | 224 bytes | 224 bytes |
| EEPROM | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes |
| Supply Voltage | 4.5V to 5.5V | 4.5V to 5.5V | 3.0V to 5.5V (broader) | 3.0V to 5.5V | 3.0V to 5.5V | 4.5V to 5.5V | 3.0V to 5.5V |
| Operating Temperature | -40C to +125C (extended) | 0C to +70C (commercial) | -40C to +85C (industrial) | 0C to +70C (commercial) | 0C to +70C (commercial) | 0C to +70C (commercial) | -40C to +125C (extended) |
| I/O Pins | 11 | 11 | 11 | 11 | 11 | 11 | 11 |
| Approx. Unit Price (qty 100) | $2.55 | ~$2.20 | ~$2.45 | ~$2.80 | ~$1.95 | ~$2.30 | ~$2.10 |
Key Differentiators
- Extended -40C to +125C temperature grade with 20MHz performance (vs PIC16F627-20/P)
- 20MHz max clock vs 4MHz on speed-04 variants (vs PIC16F627-04/P)
- Doubles flash from 1.75KB to 3.5KB without pin change (vs PIC16F627-20/P)
Design Notes
The PIC16F627-20E/P requires a regulated 4.5V-5.5V supply; place a 100nF ceramic decoupling capacitor as close as possible to pin 14 (Vdd) and pin 5 (Vss), with a 10uF tantalum or aluminum bulk capacitor at the regulator output. For battery-backed or loop-powered designs, add a 100kohm resistor from MCLR to Vdd to avoid spurious resets. The internal 4MHz oscillator draws approximately 1mA at 5V in active mode, so a switching regulator is recommended for low-power sensor applications.
Keep the ICSP pins (RB6/PGC pin 12 and RB7/PGD pin 13) accessible on the PCB for in-circuit programming and debugging. Route the MCLR/Vpp line directly to a programming header without series resistors or capacitors. Place the oscillator crystal (if used) within 1cm of pins 15-16 with a grounded guard ring to minimize EMI coupling. Decoupling capacitors should have short traces to the Vdd/Vss pins, never shared with high-noise digital signals.
Do not forget to configure all unused I/O pins as outputs (set the corresponding TRIS bits) to minimize current consumption in sleep mode. The CONFIG word must explicitly disable the watchdog timer only if firmware controls WDT postscaler; otherwise enable WDT for production firmware. Brown-out detect (BOD) configuration must match the actual Vdd voltage - setting BOD to 4.5V on a 3.3V design causes continuous reset. The OSCCAL register must be calibrated at production test or operating frequency will drift by up to +/-5% from nominal.
The PIC16F627-20E/P consumes roughly 5-15mW active at 20MHz and 5V, well within the PDIP-18 thermal limit of approximately 1W. For industrial or automotive under-hood applications the extended -40C to +125C operating range is sufficient without additional heatsinking. Always verify worst-case quiescent current by measuring I_DD in sleep mode with all peripherals disabled and all I/O configured as outputs.
Compliance Information
RoHS compliant and lead-free per Microchip product page (DS40044G family). Not formally AEC-Q100 qualified - automotive customers should select the PIC16F627A-E/P Q-grade equivalent for AEC-Q100 compliance. Conflict-mineral reporting (CMRT) is available from Microchip on request.
