PIC16F627-04/P - 4MHz 8-Bit Flash MCU, 1.75KB | Microchip
MPN: PIC16F627-04/P ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.05 | $30.50 |
| 100 | $2.69 | $269.00 |
| 500 | $2.34 | $1,170.00 |
| 1,000 | $2.05 | $2,050.00 |
PIC16F627-04/P Overview
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and I/O peripherals on one die; the 8-bit data path means arithmetic and data movement operate on 8-bit bytes. Mid-range PIC MCUs sit between baseline (10-/12-bit instruction) and enhanced mid-range / 16-bit families in Microchip's portfolio, offering a balance of code density, peripheral richness, and cost for embedded control. PIC16F627-04/P belongs to the PIC16F mid-range family and is widely used as an upgrade path from legacy PIC16C/16F devices.
Key features of the PIC16F627-04/P include: a 4 MHz internal oscillator / external clock option, 16 digital I/O pins with high-current sink/source capability, an internal 4 MHz RC oscillator, two 8-bit timers plus one 16-bit timer (Timer1), a 10-bit PWM module, an analog comparator with absolute voltage reference, a USART module for serial communication, and an internal watchdog timer with its own RC oscillator. The wide 4.5 V to 5.5 V operating range and industrial -40 C to +85 C temperature grade support harsh-environment designs.
Architecturally, the PIC16F627-04/P uses a 14-bit instruction word, separate program and data buses (Harvard), and 35 single-word instructions - making assembly programming compact and C compilation efficient. The on-chip in-circuit serial programming (ICSP) interface enables firmware updates after PCB assembly, while the flash program memory supports 100,000 erase/write cycles, allowing field-reconfigurable designs.
Typical applications include appliance controls, security and alarm panels, automotive body electronics (non-safety), industrial sensor interfaces, low-end remote controls, and general-purpose 8-bit embedded logic replacement. The PDIP-18 footprint simplifies breadboard prototyping and through-hole hobbyist designs, while the wide ecosystem of MPLAB X IDE, XC8 compiler, and PICkit programmers lowers development cost.
When designing with this MCU, ensure the supply decoupling network (100 nF + 10 uF bulk) sits within 50 mm of the VDD/VDD2 pins, and follow Microchip's recommended analog/digital ground partitioning when using the comparator with PWM to avoid switching noise coupling. For battery-powered designs, prefer the PIC16F627-04I/P (industrial -40 to +85 C variant) or the PIC16F628A for additional code space.
This page synthesizes verified distributor stock and pricing, drop-in alternative MPNs, and design considerations not aggregated on the Microchip datasheet PDF - giving procurement engineers and designers a one-stop summary for sourcing and second-source decisions.
Drop-in alternatives for PIC16F627-04/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 PIC16F627-04/P (same form factor and footprint) — differing in Operating Temperature, Package, Timers, Mounting Type, I/O Pins.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F628-04/P
✅ Drop-In✓ In Stock
$2.35 / Unit
View Datasheet →PIC16F627-04I/P
✅ Drop-In✓ In Stock
$2.3 / Unit
View Datasheet →PIC16F627A-I/P
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.72 / Unit
View Datasheet →PIC16F648A-04/P
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
PIC16F627-04/P Maximum Ratings & Electrical Characteristics
| Device Family | PIC16F62X (mid-range 8-bit) |
| Core Architecture | Harvard RISC, 14-bit instruction word |
| Instruction Set | 35 single-word instructions |
| Maximum Clock Speed | 4 MHz |
| Program Memory (Flash) | 1.75 KB (1K x 14 words) |
| Data RAM | 224 bytes |
| Data EEPROM | 128 bytes |
| I/O Pins | 16 digital I/O |
| Timers | 2 x 8-bit (Timer0, Timer2) + 1 x 16-bit (Timer1) |
| PWM Module | 10-bit resolution, 1 channel |
| Analog Comparator | Yes, with absolute voltage reference |
| USART | Yes (1 module) |
| Supply Voltage | 4.5 V to 5.5 V |
| Operating Temperature | 0 C to +70 C (commercial, /P suffix) |
| Package | 18-pin PDIP (0.300 in / 7.62 mm) |
| Mounting Type | Through-Hole (THT) |
| RoHS Status | Compliant (lead-free) |
PIC16F627-04/P Pin Configuration
| Pin 1 | RA2/AN2/VREF — Port A bit 2 / analog input / voltage reference |
| Pin 2 | RA3/AN3/CMP1 — Port A bit 3 / analog input / comparator-1 output |
| Pin 3 | RA4/T0CKI — Port A bit 4 / Timer0 clock input |
| Pin 4 | RA5/MCLR/VPP — Port A bit 5 / Master Clear (reset) / programming voltage |
| Pin 5 | VSS — Ground reference |
| Pin 6 | RB0/INT — Port B bit 0 / external interrupt |
| Pin 7 | RB1/RX/DT — Port B bit 1 / USART RX / data |
| Pin 8 | RB2/TX/CK — Port B bit 2 / USART TX / clock |
| Pin 9 | RB3/CCP1 — Port B bit 3 / Capture-Compare-PWM 1 |
| Pin 10 | RB4/PGM — Port B bit 4 / LVP programming |
| Pin 11 | RB5 — Port B bit 5 |
| Pin 12 | RB6/ICSPCLK — Port B bit 6 / ICSP clock |
| Pin 13 | RB7/ICSPDAT — Port B bit 7 / ICSP data |
| Pin 14 | VDD — Positive supply (5 V) |
| Pin 15 | OSC2/CLKOUT — Oscillator output / clock out |
| Pin 16 | OSC1/CLKIN — Oscillator input / clock in |
| Pin 17 | RA6/OSC2 — Port A bit 6 / secondary oscillator output |
| Pin 18 | RA7/OSC1 — Port A bit 7 / secondary oscillator input |
Typical Applications
PIC16F627-04/P is suitable for 6 applications: Appliance Control Boards, Security and Alarm Panels, Industrial Sensor Interfaces, Remote Control and Wireless Keyfobs, Hobby and Educational Projects, Automotive Body Electronics (Non-Safety).
Appliance Control Boards
The PIC16F627-04/P fits appliance control boards such as washing machines, microwaves, and small kitchen appliances. Its 16 high-current I/O pins (25 mA sink/source) directly drive relays, triacs, and LED indicators without external drivers. The on-chip 10-bit PWM module generates motor speed control signals for fans or pumps. With 4.5 V to 5.5 V operation and the 18-pin PDIP footprint simplifying service-friendly through-hole assembly, this MCU is preferred over SMD parts in field-replaceable consumer designs.
Recommended
Security and Alarm Panels
The PIC16F627-04/P is well suited for security alarm control panels and PIR sensor interfaces. Its 4 MHz Harvard RISC core executes 5 MIPS, sufficient for debouncing multiple zones and running a keypad scan loop concurrently. The internal EEPROM (128 bytes) stores user codes and event logs without external memory. The USART module links to a central monitoring station or GSM dialer. Operating from 5 V enables direct interface to legacy 12 V-backed alarm sensors with simple resistor dividers.
Recommended
Industrial Sensor Interfaces
In industrial sensor signal-conditioning modules, the PIC16F627-04/P reads analog comparators, scales 4-20 mA loops, and formats data for digital buses. The on-chip analog comparator with selectable voltage reference simplifies threshold detection for temperature, pressure, or level switches. The USART supports Modbus RTU over RS-485 with an external transceiver, and the industrial /04I/P variant tolerates -40 C to +85 C factory floors. EEPROM stores calibration constants.
Recommended
Remote Control and Wireless Keyfobs
The PIC16F627-04/P serves as the brain of handheld remote controls, RF keyfobs, and IR transmitter units. Its 4 MHz operation keeps current draw low, extending battery life on 2x AA or coin-cell supplies. The USART or bit-banged GPIO drives 315/433 MHz SAW transmitters or IR LEDs for line-of-sight control. The 18-pin PDIP package is breadboard-friendly for prototype development before committing to an SMD layout.
Recommended
Hobby and Educational Projects
The PIC16F627-04/P is a popular MCU for hobbyist projects, maker tutorials, and university embedded systems courses. The PDIP-18 through-hole form factor inserts easily into breadboards and stripboards, simplifying rapid prototyping without specialized reflow equipment. The 35-instruction RISC architecture makes assembly-language teaching tractable, while the XC8 C compiler and free MPLAB X IDE lower the entry barrier. Many classic textbooks use this PIC family as reference examples.
Recommended
Automotive Body Electronics (Non-Safety)
For non-safety automotive body electronics such as interior lighting controllers, mirror adjusters, or seat-position memories, the PIC16F627-04/P provides a cost-effective solution. The internal watchdog timer with dedicated RC oscillator handles automotive electrical noise and load-dump events. The 5 V operation aligns with body-control voltage rails (often regulated from 12 V). For under-hood or safety-critical applications, choose the PIC16F627-04E/P extended temperature variant or migrate to AEC-Q100 qualified PIC16F1xxx parts.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F627-04/P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F628-04/P | PIC16F627-04I/P | PIC16F627A-I/P | PIC16F648A-04/P |
|---|---|---|---|---|---|
| Package | PDIP-18 (0.300 in) | PDIP-18 - same | PDIP-18 - same | PDIP-18 - same | PDIP-18 - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 1.75 KB (1K x 14) | 3.5 KB (2K x 14) | 1.75 KB (1K x 14) | 1.75 KB (1K x 14) | 7 KB (4K x 14) |
| RAM | 224 bytes | 224 bytes | 224 bytes | 224 bytes | 256 bytes |
| EEPROM | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 256 bytes |
| Max Clock Speed | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| Operating Temperature | 0 C to +70 C | 0 C to +70 C | -40 C to +85 C | -40 C to +85 C | 0 C to +70 C |
| PWM Module | 10-bit, 1 channel | 10-bit, 1 channel | 10-bit, 1 channel | 10-bit, 1 channel | 10-bit, 1 channel |
Key Differentiators
- Higher program memory in same package (vs PIC16F627-04/P vs PIC16F628-04/P)
- Industrial temperature option (vs PIC16F627-04/P vs PIC16F627-04I/P)
- Largest Flash within PIC16F62X PDIP-18 (vs PIC16F627-04/P vs PIC16F648A-04/P)
Design Notes
Place a 100 nF ceramic decoupling capacitor within 5 mm of the VDD pin (14) and a 10 uF bulk electrolytic/tantalum at the PCB power entry. For designs using the analog comparator, add a separate 100 nF decoupling near the AVREF pin and use a star-ground topology to prevent digital switching noise from coupling into the comparator reference.
Route the ICSP lines RB6/ICSPCLK and RB7/ICSPDAT with traces shorter than 100 mm and away from switching nodes. According to Microchip's ICSP specification, a 10 kohm pull-up on MCLR (pin 4) is recommended when using high-voltage programming; for low-voltage programming (LVP), leave RB4 floating or pulled low to enter programming mode accidentally.
Do not exceed the absolute maximum VDD of 7.5 V or current per pin of 25 mA. According to the Microchip datasheet, the configuration word FOSC bits must be set before enabling the oscillator or the device may lock up; in particular, choosing an oscillator mode that does not match the actual XTAL/RC network will prevent startup. Always verify oscillator configuration in code and on hardware.
When using the internal 4 MHz RC oscillator, the OSC2/CLKOUT pin can output the system clock as a reference; if unused, leave it floating. For designs sensitive to clock jitter (USART communication), prefer an external crystal with 15-33 pF load capacitors on OSC1/OSC2, since the internal RC oscillator typically has 1-2% accuracy and may exceed the USART baud-rate error budget at 115200 bps.
Compliance Information
RoHS compliant per Microchip product page. Lead-free (Pb-free) PDIP package. Not AEC-Q100 qualified - choose PIC16F627-04I/P or PIC16F1xxx with AEC-Q100 for automotive.
