PIC16F627-20/SO - 8-Bit 20MHz 1.75KB Flash MCU | Microchip
MPN: PIC16F627-20/SO β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.32 | $3.32 |
| 10 | $2.96 | $29.60 |
| 100 | $2.45 | $245.00 |
| 500 | $2.1 | $1,050.00 |
| 1,000 | $1.83 | $1,830.00 |
PIC16F627-20/SO Overview
An 8-bit microcontroller (MCU) is a single-chip processor that integrates a CPU, non-volatile program memory (typically Flash), working RAM, and a rich set of peripheral interfaces. PIC microcontrollers use a Harvard architecture with separate program and data buses, a RISC instruction set (only 35 single-word instructions on the PIC16F62X family), and deterministic instruction timing - 200 ns per instruction at 20 MHz. Within the broader IC taxonomy, an MCU sits below microprocessors in complexity but above generic logic ICs, and it is the canonical choice for embedded control where deterministic real-time response, low power, and small footprint dominate.
Key features of the PIC16F627-20/SO include a 20 MHz maximum clock speed, 4.5 V to 5.5 V supply range, power-on reset (POR), power-up timer (PWRT), oscillator start-up timer (OST), brown-out detect (BOD), and a watchdog timer (WDT) with its own dedicated on-chip RC oscillator. Programmable weak pull-ups on PORTB, a multiplexed MCLR pin, and ICSP (In-Circuit Serial Programming) via two pins round out the system-level integration. Harvard separation between program Flash and data EEPROM also allows simultaneous instruction fetch and data access.
Typical applications for this part include industrial control logic, appliance control boards, sensor signal conditioning with on-chip comparators, low-cost UART-connected sensor nodes, simple PWM motor or LED drivers, and general-purpose embedded replacements for discrete logic. The 18-pin SOIC footprint and 5 V native supply make it especially attractive for through-hole-style 14-pin PIC upgrades where more peripherals are needed without changing the PCB.
When designing with this device, leave adequate decoupling on VDD (a 100 nF ceramic close to the pin) and follow the datasheet's oscillator configuration table when selecting XT, HS, RC, or LP modes. Stack-overflow-prone firmware should enable the WDT to recover from lock-ups in remote installations. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for PIC16F627-20/SO 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 PIC16F627-20/SO (same form factor and footprint) β differing in Package, I/O Pins, Core Architecture, Mounting Type, Program Memory (Flash).
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PIC16F627-20I/SO
β Drop-Inπ Reference alternative (not in catalog)
PIC16F627T-20/SO
β Drop-Inπ Reference alternative (not in catalog)
PIC16F627-04/SO
β Drop-Inπ Reference alternative (not in catalog)
PIC16F627A-I/SO
β Drop-Inβ In Stock
$1.74 / Unit
View Datasheet βPIC16F628-20/SO
β Drop-Inπ Reference alternative (not in catalog)
PIC16F627-20/P
β Drop-In β οΈ εζ°εΎ ιͺθ―β In Stock
$1.74 / Unit
View Datasheet βPIC16F627-20/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit Harvard RISC |
| Program Memory (Flash) | 1.75 KB (1K x 14 words) |
| Data SRAM | 224 bytes |
| Data EEPROM | 128 bytes |
| Maximum Clock Frequency | 20 MHz |
| Instruction Execution Time | 200 ns at 20 MHz |
| Supply Voltage (VDD) | 4.5 V to 5.5 V |
| I/O Pins | 16 |
| Package | 18-pin SOIC (SO) 0.300 inch width |
| A/D Converter | None (uses comparators instead) |
| Comparators | 2 on-chip analog comparators |
| USART | Yes (1x SCI/USART) |
| CCP Module | 1 capture/compare/PWM |
| Programmable Voltage Reference | Yes |
| Watchdog Timer | Yes, dedicated on-chip RC oscillator |
| Brown-out Detect (BOD) | Yes |
| In-Circuit Serial Programming (ICSP) | Yes |
| Operating Temperature Range | 0C to +70C (commercial) / -40C to +85C (industrial -20I variant) |
| Mounting Type | Surface Mount (SOIC) |
| RoHS Compliance | Compliant (lead-free SO package) |
| Instruction Set | 35 single-word instructions |
PIC16F627-20/SO Pin Configuration
| Pin 1 | RA2 β Bidirectional I/O pin; analog comparator input |
| Pin 2 | RA3 β Bidirectional I/O pin; analog comparator input |
| Pin 3 | RA4 β Bidirectional I/O pin; comparator output |
| Pin 4 | MCLR/RA5 β Master Clear (reset) input / RA5 I/O |
| Pin 5 | VDD β Positive supply voltage (+5 V) |
| Pin 6 | RB0 β Bidirectional I/O; interrupt-on-change |
| Pin 7 | RB1 β Bidirectional I/O |
| Pin 8 | RB2 β Bidirectional I/O |
| Pin 9 | RB3 β Bidirectional I/O |
| Pin 10 | RB4 β Bidirectional I/O; interrupt-on-change |
| Pin 11 | RB5 β Bidirectional I/O; interrupt-on-change |
| Pin 12 | RB6/PGC β Bidirectional I/O; ICSP clock |
| Pin 13 | RB7/PGD β Bidirectional I/O; ICSP data |
| Pin 14 | VSS β Ground reference |
| Pin 15 | RA6 β Bidirectional I/O; oscillator pin |
| Pin 16 | RA7 β Bidirectional I/O; oscillator pin |
| Pin 17 | RA0 β Bidirectional I/O; analog comparator input |
| Pin 18 | RA1 β Bidirectional I/O; analog comparator input |
Typical Applications
PIC16F627-20/SO is suitable for 6 applications: Industrial Control Logic, Appliance Control Boards, UART Sensor Hub / Data Logger, PWM Motor and LED Driver, Automotive Body Control Modules, Embedded Replacement for Discrete Logic.
Industrial Control Logic
The PIC16F627-20/SO fits industrial control logic boards because its 20 MHz clock, 1.75 KB Flash, and 5 V native supply match legacy PLC-style designs. Two on-chip comparators handle analog threshold detection, and the USART provides RS-232/RS-485 communication to supervisory PLCs or HMIs. Compared to a discrete 555-timer logic design, the PIC16F627-20/SO reduces part count, simplifies firmware upgrades, and offers brown-out detect plus watchdog timer for robust factory-floor operation. Per Microchip datasheet DS40302C, the device's industrial-grade ESD rating and -40C to +85C variants are qualified for harsh environments. The 18-pin SOIC footprint is footprint-compatible with PIC16F628 (more Flash), allowing BOM flexibility.
Recommended
Appliance Control Boards
The PIC16F627-20/SO is a strong fit for appliance control boards (washing machines, dishwashers, microwave ovens, HVAC thermostats) because of its low BOM cost, integrated comparators for sensor feedback, and the PWM/CCP module for motor or valve control. With 16 I/O pins, the MCU can directly drive relay arrays, LED indicators, and keypad scanning matrices. The integrated brown-out detect and watchdog timer protect against brown-out crashes common in motor-rich electrical environments. Per Microchip datasheet DS40302C, the device draws <2 mA active at 5 V and <1 uA sleep, ideal for ENERGY STAR compliance. Engineers can pair it with the PIC16F627-20I/SO for cold-storage variants.
Recommended
UART Sensor Hub / Data Logger
The PIC16F627-20/SO works well as a low-cost UART sensor hub because its hardware USART/SCI peripheral handles RS-232, RS-485, or LIN bus protocols without bit-banging. The 224-byte SRAM buffers short packets, and 128 bytes of EEPROM stores calibration constants or last-known state across power cycles. The CCP module can timestamp events using Timer1. Compared to a UART-over-SPI bridge, the integrated USART reduces firmware complexity and CPU overhead. Per Microchip datasheet DS40302C, the USART supports 9-bit mode for multi-drop RS-485 addressing, ideal for industrial sensor networks. The 18-pin SOIC footprint is small enough for sub-100 mm square sensor nodes.
Recommended
PWM Motor and LED Driver
The PIC16F627-20/SO is well-suited for low-power PWM motor speed control and LED dimming applications where its CCP/PWM module delivers 10-bit resolution at 19.5 kHz with no extra components. The two analog comparators can implement closed-loop current limiting, while the 16 I/O pins drive multiple MOSFET half-bridges or LED strings. At 20 MHz clock the PWM is fast enough for brushed DC motors and high-frequency LED drivers without audible switching artifacts. Per Microchip datasheet DS40302C, the PWM duty cycle can be updated asynchronously without glitches. Compared to dedicated PWM controllers, the PIC16F627-20/SO adds programmability and serial command interface in the same 18-SOIC PCB area.
Recommended
Automotive Body Control Modules
The PIC16F627-20/SO is used in non-safety automotive body control applications (interior lighting, accessory timing, simple switch debouncers) because it operates reliably from regulated 5 V body supplies, integrates brown-out detection for cranking transients, and provides 16 I/O pins for switch and relay scanning. Per Microchip datasheet DS40302C and the AEC-Q100 grade equivalents in the family (PIC16F627A-E/SO), the device can handle 12 V battery transients with external regulation. The wide operating temperature variants (PIC16F627-20I/SO, -40C to +85C) cover cabin-mounted ECUs. Cross-brand competitors in this space include the ATtiny series from Microchip (note: same company), but for legacy design continuity the PIC16F627-20/SO is preferred.
Recommended
Embedded Replacement for Discrete Logic
The PIC16F627-20/SO is an excellent drop-in replacement for discrete 74HC logic glue, NE555 timer boards, and small CMOS state machines in legacy equipment. With 1.75 KB of Flash it absorbs moderate logic complexity, the 16 I/O pins replace 2-3 small logic ICs, and the integrated USART adds communication where none existed. Per Microchip datasheet DS40302C, the 35-instruction RISC core requires minimal firmware investment, and ICSP allows in-circuit firmware updates during board bring-up. Compared to fixed-function logic, the PIC16F627-20/SO reduces PCB area by 40-60 percent and provides firmware-driven design changes without respinning the board. Engineers can use the PIC16F628-20/SO if more code memory is needed.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F627-20/SO β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F627-20I/SO | PIC16F627T-20/SO | PIC16F627-04/SO | PIC16F627A-I/SO | PIC16F628-20/SO |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 18-pin SOIC | 18-pin SOIC | 18-pin SOIC | 18-pin SOIC | 18-pin SOIC | 18-pin SOIC |
| Flash Memory | 1.75 KB | 1.75 KB | 1.75 KB | 1.75 KB | 1.75 KB | 3.5 KB (+100%) |
| Max Clock Speed | 20 MHz | 20 MHz | 20 MHz | 4 MHz (-80%) | 20 MHz | 20 MHz |
| SRAM | 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 |
| Internal Oscillator | No (external only) | No (external only) | No (external only) | No (external only) | Yes, 4 MHz internal | No (external only) |
| I/O Pins | 16 | 16 | 16 | 16 | 16 | 16 |
| Operating Temperature | 0C to +70C | -40C to +85C | 0C to +70C | 0C to +70C | -40C to +85C | 0C to +70C |
| Comparators | 2 | 2 | 2 | 2 | 2 | 2 |
Key Differentiators
- Industrial-temperature drop-in variant available (vs PIC16F627-20/SO (commercial) vs PIC16F627-20I/SO (industrial))
- Tape-and-reel variant for high-volume assembly (vs PIC16F627-20/SO (tube) vs PIC16F627T-20/SO (T&R))
- Pin-compatible higher-memory upgrade path (vs PIC16F627-20/SO vs PIC16F628-20/SO)
- Modernized silicon revision available (vs PIC16F627-20/SO vs PIC16F627A-I/SO)
Design Notes
Estimated: At VDD = 5.0 V and 20 MHz active, the PIC16F627-20/SO draws approximately 8-10 mA active and <1 uA sleep per Microchip datasheet DS40302C. Place a 100 nF ceramic decoupling capacitor within 5 mm of the VDD pin (pin 5) to suppress switching transients, and a bulk 10 uF tantalum or aluminum electrolytic on the supply rail. For battery-powered designs, leverage the SLEEP instruction plus WDT wakeup to achieve <5 uA average current in duty-cycled applications.
The 18-pin SOIC footprint has 0.050 inch (1.27 mm) pin pitch and 0.300 inch (7.5 mm) body width per Microchip datasheet DS40302C. Keep the ICSP pins RB6 (clock) and RB7 (data) routed with short traces to a 6-pin header for PICkit programming access. Place the external crystal or resonator within 10 mm of pins RA6 (pin 15) and RA7 (pin 16) and guard the traces with a ground pour to minimize EMI coupling into adjacent analog comparator inputs.
Do not leave the MCLR pin floating; tie it through a 10 kohm pull-up to VDD or directly driven by a supervisor / reset IC. Floating MCLR causes intermittent resets and erratic operation. Also, configure the brown-out detect (BOD) configuration fuses to match your supply tolerance - factory default may be disabled. When migrating PIC16F627 code to PIC16F627A, recompile because the device ID and config-word addresses changed in the A revision per Microchip migration guide.
The PIC16F627-20/SO has no internal oscillator, so external clock quality directly affects timing accuracy. For RS-232/USART baud-rate-critical designs, use a crystal (HS or XT mode) rather than an RC oscillator; typical RS-232 links need 1 percent baud-rate accuracy. The analog comparator inputs (RA0-RA3) share pins with digital I/O; configure them as analog by clearing the corresponding CMCON/ANSEL bits to avoid digital switching noise coupling into comparator thresholds.
Compliance Information
RoHS and lead-free per Microchip product page; AEC-Q100 qualified parts are in the PIC16F627A-E/SO family. Conflict-minerals compliant per Microchip supplier declarations.
