PIC16F627-20I/P - 8-bit Flash MCU, 20MHz, 1.75KB | Microchip
MPN: PIC16F627-20I/P ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.07 | $30.70 |
| 100 | $2.71 | $271.00 |
| 500 | $2.42 | $1,210.00 |
| 1,000 | $2.18 | $2,180.00 |
PIC16F627-20I/P Overview
An 8-bit microcontroller (MCU) is a self-contained computing IC that integrates a CPU, non-volatile program memory (Flash or ROM), volatile data memory (RAM), and peripheral blocks such as timers, communication interfaces, and analog comparators on a single silicon die. The PIC16F627 belongs to Microchip's mid-range PIC16 family, sitting in the broader hierarchy: PIC16F -> 8-bit PIC microcontroller -> microcontroller -> embedded controller -> semiconductor device. PIC MCUs are widely used because they employ a Harvard architecture with separated program and data buses, a RISC instruction set of only 35 single-word instructions, and deterministic interrupt latency that simplifies real-time firmware design.
Key features of the PIC16F627-20I/P include 1.75 KB of self-programmable Flash (100K erase/write cycles typical), 224 bytes of RAM, and 128 bytes of EEPROM for non-volatile data storage with 1M erase/write endurance. The device supports an operating voltage range of 2.0 V to 5.5 V, low-power Sleep mode with wake-up on pin change, and an internal oscillator option on later "A" revision silicon. It also provides a programmable brown-out reset, a watchdog timer with its own on-chip RC oscillator, and In-Circuit Serial Programming (ICSP) for in-system firmware updates.
Architecturally, the PIC16F627-20I/P uses a 14-bit instruction word with a hardware multiplier absent, single-cycle branch execution, and a two-stage pipeline. Its USART supports both asynchronous RS-232 and synchronous SPI master/slave modes, while the two analog comparators can be software-routed to internal reference voltages for threshold detection. These features make the device well suited to small embedded control tasks where deterministic timing and minimal external components matter more than raw compute throughput.
Typical applications include appliance control boards, sensor signal conditioning, automotive body modules (non-safety), remote controls, low-cost motor drivers, security keypads, LED lighting controllers, and small industrial sensor nodes. The wide 2.0 V to 5.5 V supply range also enables battery-powered designs powered by 2xAA or single-cell Li-ion chemistries.
When designing with this part, observe the maximum clock rate of 20 MHz versus the slower 4 MHz and 32 kHz internal oscillator options for low-power operation. Place a 100 nF decoupling capacitor close to VDD, and configure the MCLR pin with the recommended 10 kohm pull-up plus optional reset capacitor to avoid spurious resets. For designs migrating to the higher-integration PIC16F627A revision silicon, verify that any pinout or register-level changes are accommodated before qualification.
This page synthesizes distributor pricing, drop-in alternatives drawn from the PIC16F62X family, and practical design notes not consolidated in the Microchip datasheet alone.
Drop-in alternatives for PIC16F627-20I/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 PIC16F627-20I/P (same form factor and footprint) — differing in Operating Temperature, Package, I/O Pins, Analog Comparators, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F628-20I/P
✅ Drop-In✓ In Stock
$2.1 / Unit
View Datasheet →PIC16F627-20E/P
✅ Drop-In✓ In Stock
$1.95 / Unit
View Datasheet →PIC16F627-20/P
✅ Drop-In✓ In Stock
$1.74 / Unit
View Datasheet →PIC16F627-04I/P
✅ Drop-In✓ In Stock
$2.3 / Unit
View Datasheet →PIC16F627A-I/P
✅ Drop-In✓ In Stock
$1.72 / Unit
View Datasheet →PIC16F627-20I/P Maximum Ratings & Electrical Characteristics
| Product Type | 8-bit Flash Microcontroller (MCU) |
| Family | PIC16F62X (mid-range) |
| Program Memory (Flash) | 1.75 KB (1024 x 14-bit words) |
| RAM | 224 bytes |
| EEPROM Data Memory | 128 bytes |
| Maximum Clock Speed | 20 MHz |
| Instruction Cycle Time | 200 ns |
| Instruction Set | 35 single-word RISC instructions (14-bit) |
| I/O Pins | 16 |
| Timers | 3 (Timer0, Timer1, Timer2) |
| Analog Comparators | 2 |
| Communication Modules | USART/SCI |
| CCP Module | 1 (Capture/Compare/PWM) |
| Operating Voltage | 2.0 V to 5.5 V |
| Operating Temperature | -40 C to +85 C (Industrial grade) |
| Package | PDIP-18 (through-hole) |
| Mounting Type | Through-Hole (DIP) |
| Programming Method | ICSP (In-Circuit Serial Programming) |
| Architecture | Harvard, RISC |
| RoHS Status | Compliant |
PIC16F627-20I/P Pin Configuration
| Pin 1 | RA2 — Port A bit 2 / analog comparator output |
| Pin 2 | RA3 — Port A bit 3 / MCLR optional |
| Pin 3 | RA4 — Port A bit 4 / T0CKI |
| Pin 4 | MCLR — Master Clear reset input |
| Pin 5 | VSS — Ground reference |
| Pin 6 | RB0 — Port B bit 0 / INT interrupt |
| Pin 7 | RB1 — Port B bit 1 / RX |
| Pin 8 | RB2 — Port B bit 2 / TX |
| Pin 9 | RB3 — Port B bit 3 / CCP1 |
| Pin 10 | RB4 — Port B bit 4 / PGM |
| Pin 11 | RB5 — Port B bit 5 |
| Pin 12 | RB6 — Port B bit 6 / ICSP clock |
| Pin 13 | RB7 — Port B bit 7 / ICSP data |
| Pin 14 | VDD — Positive supply 2.0-5.5 V |
| Pin 15 | OSC2 — Oscillator output |
| Pin 16 | OSC1 — Oscillator input |
| Pin 17 | RA0 — Port A bit 0 / comparator input |
| Pin 18 | RA1 — Port A bit 1 / comparator input |
Typical Applications
PIC16F627-20I/P is suitable for 6 applications: Appliance Control Boards, Remote Control Transmitters, LED Lighting Controllers, Industrial Sensor Nodes, Automotive Body Modules, Security Keypads and Access Control.
Appliance Control Boards
The PIC16F627-20I/P fits appliance control boards because its 16 I/O pins directly drive relays, triacs, and seven-segment LED displays without external mux ICs. At 20 MHz the 200 ns instruction cycle executes scan loops and button debouncing in microseconds, leaving headroom for state-machine logic. The 2.0-5.5 V range supports both 3.3 V logic-level sensors and legacy 5 V triac drivers, while ICSP enables end-of-line firmware customization for different SKUs. Brown-out reset prevents corruption when mains relays drop voltage during inrush.
Recommended
Remote Control Transmitters
For IR/RF remote controls the PIC16F627-20I/P's Sleep mode draws only nanoamp-level current, enabling multi-year battery life from coin cells. Its 16 I/O lines scan 4x4 keypads and drive IR LEDs directly, while the USART generates accurate 38 kHz carrier frequencies for consumer IR protocols. The 1.75 KB Flash holds complete RC5/RC6 or NEC encoder tables plus custom key mappings, and the watchdog timer recovers the device from any code lockup. Industrial -40C to +85C operation supports outdoor and automotive remote use.
Recommended
LED Lighting Controllers
The PIC16F627-20I/P drives LED lighting controllers by combining its CCP/PWM module with 16 I/O lines to control brightness and RGB mixing. PWM resolution scales with Timer2 prescaler to deliver 10-bit color depth at acceptable refresh rates, while the 20 MHz clock ensures flicker-free dimming down to 1% duty cycle. The wide 2.0-5.5 V supply range simplifies designs using constant-current LED drivers powered from 12 V or 24 V buses, and the USART interfaces to DMX-512 or 0-10 V analog dimming receivers.
Recommended
Industrial Sensor Nodes
The PIC16F627-20I/P serves industrial sensor nodes because its two analog comparators provide threshold detection without external ADC hardware. Combined with a temperature sensor on RA0/RA1 and a 4-20 mA current loop on RA2, the MCU computes setpoint decisions and drives digital outputs within microseconds. The industrial -40C to +85C grade survives factory-floor temperature swings, while EEPROM retains calibration constants for the lifetime of the installation. Brown-out and watchdog timers ensure deterministic recovery from supply glitches common in motor cabinets.
Recommended
Automotive Body Modules
In non-safety body electronics the PIC16F627-20I/P drives mirror controls, seat adjusters, and lighting dimmers using its 16 I/O lines and PWM channels. The USART interfaces to LIN sub-bus transceivers for body-domain networking, while Timer1 generates the LIN break-field symbol without CPU overhead. ICSP supports end-of-line configuration via the OBD-II connector, and the 128-byte EEPROM stores per-vehicle option codes. For under-hood applications exceeding +85C, designers should step up to the PIC16F627-20E/P extended temperature grade instead.
Recommended
Security Keypads and Access Control
The PIC16F627-20I/P powers security keypads and access control readers because it scans 4x4 or 4x5 matrix keypads using only 8 I/O lines, leaving 8 lines for relay drivers, status LEDs, and a Wiegand/clock-data interface to the host reader. The 128-byte EEPROM stores encrypted access codes and audit trails, while the watchdog timer prevents lockup if the input scan stalls. The USART interfaces to external RFID or BLE modules for credential reads, and the industrial temperature grade supports outdoor keypad installations.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F627-20I/P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F628-20I/P | PIC16F627-20E/P | PIC16F627-20/P | PIC16F627-04I/P | PIC16F627A-I/P |
|---|---|---|---|---|---|---|
| Brand | 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 | PDIP-18 - same |
| Program Memory (Flash) | 1.75 KB | 3.5 KB (+100%) | 1.75 KB (same) | 1.75 KB (same) | 1.75 KB (same) | 1.75 KB (same) |
| Maximum Clock Speed | 20 MHz | 20 MHz (same) | 20 MHz (same) | 20 MHz (same) | 4 MHz (-80%) | 20 MHz (same) |
| RAM | 224 bytes | 224 bytes (same) | 224 bytes (same) | 224 bytes (same) | 224 bytes (same) | 224 bytes (same) |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C (same) | -40 C to +125 C (Extended) | 0 C to +70 C (Commercial) | -40 C to +85 C (same) | -40 C to +85 C (same) |
| EEPROM | 128 bytes | 128 bytes (same) | 128 bytes (same) | 128 bytes (same) | 128 bytes (same) | 128 bytes (same) |
| Internal Oscillator | No (external required) | No | No | No | No | Yes (4 MHz internal) |
Key Differentiators
- Drop-in upgrade with double Flash at same price point (vs PIC16F628-20I/P)
- Extended temperature grade option in same package (vs PIC16F627-20E/P)
- Mature long-life silicon with wide second-source availability (vs PIC16F627-04I/P)
Design Notes
Place a 100 nF decoupling capacitor as close as physically possible to the VDD pin (pin 14) of the PIC16F627-20I/P, with the ground return directly to the VSS pin (pin 5) on the same PCB side. For designs with multiple ICs, add a bulk 10 uF tantalum or aluminum electrolytic at the board entry point to suppress mains or load transients. The PIC's wide 2.0-5.5 V operating range simplifies power tree design, but the brown-out reset threshold should be configured just below the minimum expected VDD to prevent code execution at marginal voltages.
Do not leave the MCLR pin floating - the PIC16F627-20I/P datasheet specifies a 10 kohm pull-up to VDD is mandatory. Add an optional 100 nF capacitor to ground for slow-rising supply filtering, but note this introduces a 1 ms reset delay. Configure unused I/O pins as outputs (not inputs) in firmware to avoid shoot-through current; floating inputs can toggle randomly and consume microamp-level quiescent current that disturbs Sleep-mode battery calculations.
Route the crystal traces from OSC1/OSC2 (pins 16/15) with short, symmetric traces and guard them from digital switching signals with a ground pour on both sides. Keep the load capacitors within 5 mm of the oscillator pins. For high-speed designs above 10 MHz, consider a 4-layer PCB with a dedicated ground plane under the MCU; the PDIP-18 package has limited lead pitch (2.54 mm) which constrains trace widths, so prioritize routing the analog and high-impedance signals first.
Compliance Information
RoHS and lead-free compliant per Microchip product page. Not AEC-Q100 qualified; automotive under-hood applications should use PIC16F627-20E/P extended temperature grade. Halogen-free status not stated in provided data.
