PIC16F627-04E/P - 8-bit Flash MCU, 4MHz, 1.75KB, 18-DIP | Microchip
MPN: PIC16F627-04E/P ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.95 | $2.95 |
| 10 | $2.66 | $26.60 |
| 100 | $2.3 | $230.00 |
| 500 | $2.07 | $1,035.00 |
| 1,000 | $1.85 | $1,850.00 |
PIC16F627-04E/P Overview
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, non-volatile program memory (Flash/ROM/EPROM), data memory, timers, interrupts, and I/O peripherals on one die. Within the broader taxonomy, the PIC16F627 sits in the mid-range 8-bit PIC16 family of MCUs -> 8-bit microcontrollers -> microcontrollers (MCUs) -> microprocessors and microcontrollers -> semiconductor ICs -> integrated circuits. The RISC Harvard architecture used by PIC16F62X separates program and data buses, enabling simultaneous instruction fetch and data access, which yields deterministic instruction timing suitable for real-time embedded control.
Key differentiating features include a hardware USART for asynchronous serial communication, a capture/compare/PWM (CCP) module, two 8-bit timers (TMR0/TMR2) plus one 16-bit timer (TMR1), a watchdog timer (WDT) with its own dedicated on-chip RC oscillator for reliable operation independent of the system clock, brown-out detect (BOD), power-on reset (POR), power-up timer (PWRT), and oscillator start-up timer (OST). The instruction set comprises only 35 single-word instructions, easing firmware development. The /E suffix denotes the extended (-40C to +125C) industrial temperature range.
Architecturally the PIC16F627 uses a 14-bit wide instruction word and supports both internal and external oscillator modes (LP, XT, HS, RC, INTOSC), with an internal 4 MHz RC oscillator available. The Flash memory supports in-circuit serial programming (ICSP) via the RB6/RB7 pins plus MCLR, enabling in-field firmware updates without removing the device from the board.
Typical applications include low-cost remote controls, sensor signal conditioning front-ends, simple motor control loops, RS-232/RS-485 protocol bridges, appliance control boards, battery chargers, and consumer white-goods control panels. The compact 18-pin DIP form factor also makes the part a popular choice for hobbyist, education, and breadboard-prototype development.
Designers should allocate the MCLR pin with the standard 10 kohm pull-up to VDD and the recommended 100 nF decoupling capacitor on VDD placed within 5 mm of the pin. The /E extended temperature grade makes the part well-suited to automotive under-hood and industrial cabinet environments where commercial-grade 0C to +70C parts would fail.
This page synthesizes distributor pricing, drop-in same-package alternatives within the PIC16F62X family, and practical engineering design notes not found in the bare datasheet.
Drop-in alternatives for PIC16F627-04E/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 PIC16F627-04E/P (same form factor and footprint) — differing in Package, Operating Temperature, Timers, I/O Pins, Mounting Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F628-04E/P
✅ Drop-In✓ In Stock
$2.55 / Unit
View Datasheet →PIC16F648A-04E/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F627-04/P
✅ Drop-In✓ In Stock
$2.05 / Unit
View Datasheet →PIC16F627-04/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F627-04E/SS
✅ Drop-In✓ In Stock
$1.52 / Unit
View Datasheet →PIC16F628-04I/P
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$2.16 / Unit
View Datasheet →PIC16F627-04E/P Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC RISC, Harvard |
| Family | PIC16F62X (PIC16F627/628/648) |
| Program Memory | 1.75 KB Flash (1K x 14) |
| RAM | 224 bytes |
| EEPROM | 128 bytes |
| Instruction Set Width | 14-bit |
| Number of Instructions | 35 |
| Instruction Execution Time | 200 ns at 20 MHz (4 MHz oscillator at /04 speed grade) |
| Maximum Clock Frequency | 20 MHz |
| Oscillator Speed Grade | 04 (4 MHz) |
| Supply Voltage (VDD) | 2.0 V to 5.5 V |
| I/O Pins | 11 |
| Timers | TMR0 (8-bit), TMR1 (16-bit), TMR2 (8-bit) |
| CCP Module | 1 (Capture / Compare / PWM) |
| Communication | USART (async serial) |
| Watchdog Timer | Yes (with dedicated on-chip RC oscillator) |
| Brown-out Detect (BOD) | Yes |
| Power-on Reset / PWRT / OST | Yes |
| Programmable Weak Pull-ups | Yes (PORTB) |
| In-Circuit Serial Programming (ICSP) | Yes (RB6/RB7 + MCLR) |
| Operating Temperature | -40C to +125C (/E industrial extended grade) |
| Package | 18-pin PDIP (0.300 inch, plastic DIP) |
| RoHS Status | Compliant (lead-free) |
| Mounting Type | Through-Hole |
PIC16F627-04E/P Pin Configuration
| Pin 1 | RA5/MCLR/VPP — Master Clear (reset) input / programming voltage / digital I/O RA5 |
| Pin 2 | RA0/AN0 — Digital I/O RA0 / analog input AN0 |
| Pin 3 | RA1/AN1 — Digital I/O RA1 / analog input AN1 |
| Pin 4 | RA2/AN2/VREF — Digital I/O RA2 / analog input AN2 / ADC voltage reference |
| Pin 5 | RA3/AN3 — Digital I/O RA3 / analog input AN3 |
| Pin 6 | RA4/TOCKI/C1OUT — Digital I/O RA4 / Timer0 clock input / Comparator 1 output |
| Pin 7 | RA6/OSC2/CLKOUT — Digital I/O RA6 (some packages) / oscillator crystal output / clock out |
| Pin 8 | VSS — Ground reference |
| Pin 9 | OSC1/CLKIN — Oscillator crystal input / external clock input |
| Pin 10 | OSC2/CLKOUT — Oscillator crystal output / clock output (Fosc/4) |
| Pin 11 | RC0 — Digital I/O RC0 |
| Pin 12 | RC1 — Digital I/O RC1 |
| Pin 13 | RC2/CCP1 — Digital I/O RC2 / Capture-Compare-PWM channel 1 |
| Pin 14 | RC3 — Digital I/O RC3 |
| Pin 15 | RC4 — Digital I/O RC4 |
| Pin 16 | RC5 — Digital I/O RC5 |
| Pin 17 | RC6/TX/CK — Digital I/O RC6 / USART asynchronous transmit / USART synchronous clock |
| Pin 18 | RC7/RX/DT — Digital I/O RC7 / USART asynchronous receive / USART synchronous data |
Typical Applications
PIC16F627-04E/P is suitable for 7 applications: Remote Control Transmitter, Appliance Control Board, Battery Charger Controller, Industrial Sensor Front-End, Automotive Accessory Module, RS-232/RS-485 Protocol Bridge, Educational / Hobby Development Platform.
Remote Control Transmitter
The PIC16F627-04E/P fits remote-control transmitter designs because its 11 I/O pins directly drive a 4x3 matrix keypad plus an IR LED without external logic, while the 1K x 14 Flash holds compact encoding firmware and 128 B of EEPROM stores learned-device codes. The internal 4 MHz oscillator eliminates an external resonator, reducing BOM cost. The /E extended -40C to +125C grade supports outdoor and garage environments. The CCP module generates accurate 38 kHz carrier PWM, and the USART is unused but available for debugging.
Recommended
Appliance Control Board
For white-goods appliance control boards (washing machines, dishwashers, microwave ovens), the PIC16F627-04E/P's 8-bit Harvard RISC core executes deterministic instruction cycles that simplify timing of triac-fired heater elements and pump relays. Its integrated brown-out detect and watchdog timer with dedicated RC oscillator recover from supply brown-outs and firmware lockups - critical for unattended appliance safety. The /E extended temperature grade survives under-cabinet thermal rise to +125C. Eleven I/O pins handle keypad scanning, LED status, and relay drive without external mux.
Recommended
Battery Charger Controller
The PIC16F627-04E/P controls NiCd/NiMH/Li-ion charger topologies by using the on-chip 8-bit ADC (via analog comparator) to sense battery voltage and the CCP PWM module to drive a buck-converter MOSFET at up to 4 MHz / 1 us resolution. Its 2.0V-5.5V VDD range allows direct operation from a single Li-ion cell. The 128-byte EEPROM stores charge-profile parameters and cycle counters without external memory. Per the Microchip PIC16F62X datasheet, low sleep current (under 1 uA typical) extends shelf life on standby chargers.
Recommended
Industrial Sensor Front-End
In industrial 4-20 mA loop-powered sensor transmitters, the PIC16F627-04E/P conditions and linearizes sensor inputs while the integrated USART drives an RS-485 link to a PLC. The 16-bit TMR1 provides precise pulse counting for flow meters, and the watchdog timer with dedicated RC oscillator ensures recovery from EMI-induced firmware upsets common on factory floors. The /E extended temperature range tolerates cabinet temperatures above +85C. Low sleep current and wide 2.0V-5.5V operation support loop-powered designs that harvest energy from the 4-20 mA current.
Recommended
Automotive Accessory Module
The PIC16F627-04E/P serves as the controller in non-safety automotive accessories such as interior lighting controllers, seat-position memory, and aftermarket alarm systems. Its /E extended -40C to +125C grade handles cabin and under-hood thermal swings, while the integrated brown-out detect survives cranking transients on the 12 V bus when paired with an external regulator. The CCP module generates PWM for LED dimming, and the USART links to a body-control network. While not AEC-Q100 qualified, the part is widely used in non-signal automotive subsystems.
Recommended
RS-232/RS-485 Protocol Bridge
The PIC16F627-04E/P bridges RS-232 and RS-485 protocols by using the integrated USART for one side and bit-banged UART on PORTB for the other, with the CCP module generating precise inter-frame timing. Its 11 I/O pins accommodate direction control (DE/RE) lines and status LEDs without external glue logic. The 1.75 KB Flash holds complete protocol state machines including Modbus RTU. The /E extended temperature grade supports outdoor and industrial cabinet installations, and the 2.0V-5.5V VDD range simplifies powering from 3.3 V or 5 V rails.
Recommended
Educational / Hobby Development Platform
The PIC16F627-04E/P remains a popular 8-bit teaching platform because the 18-PDIP package is breadboard-friendly, the 35-instruction RISC core is straightforward to learn, and the ICSP interface (RB6/RB7 + MCLR) lets students re-flash firmware in-circuit with a $15 PICkit 3 clone. The 1.75 KB Flash is large enough to host complete lessons on timers, ADC, interrupts, and PWM, while the 224 B RAM supports realistic small projects. Per Microchip's MPLAB X IDE, free toolchain support and the PICkit programmer ecosystem make it ideal for first-year embedded courses and maker projects.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F627-04E/P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F628-04E/P | PIC16F648A-04E/P | PIC16F627-04/P | PIC16F627-04/SO | PIC16F627-04E/SS | PIC16F628-04I/P |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 18-PDIP | 18-PDIP - same | 18-PDIP - same | 18-PDIP - same | 18-SOIC - differs (SMT) | 18-SSOP - differs (SMT) | 18-PDIP - same |
| Flash Program Memory | 1.75 KB (1K x 14) | 3.5 KB (2K x 14) | 7 KB (4K x 14) | 1.75 KB (1K x 14) | 1.75 KB (1K x 14) | 1.75 KB (1K x 14) | 3.5 KB (2K x 14) |
| RAM | 224 bytes | 224 bytes | 256 bytes | 224 bytes | 224 bytes | 224 bytes | 224 bytes |
| EEPROM | 128 bytes | 128 bytes | 256 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes |
| Max Oscillator Frequency | 4 MHz (/04 speed grade) | 4 MHz (/04) | 4 MHz (/04) | 4 MHz (/04) | 4 MHz (/04) | 4 MHz (/04) | 4 MHz (/04) |
| Supply Voltage (VDD) | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V |
| Operating Temperature | -40C to +125C (/E extended) | -40C to +125C (/E) | -40C to +125C (/E) | 0C to +70C (commercial) | 0C to +70C (commercial) | -40C to +125C (/E) | -40C to +85C (/I industrial) |
| I/O Pins | 11 | 11 | 11 | 11 | 11 | 11 | 11 |
Key Differentiators
- Extended industrial temperature grade (-40C to +125C) at lowest cost in the family (vs PIC16F627-04/P)
- Lowest-cost entry to the PIC16F62X family with Flash-based program memory (vs PIC16F628-04E/P)
- Through-hole 18-PDIP package ideal for breadboard and education (vs PIC16F627-04/SO)
Design Notes
Place a 100 nF decoupling capacitor within 5 mm of the VDD pin (pin 14 in 18-PDIP), with a 10 uF bulk capacitor on the same VDD rail. According to the Microchip PIC16F62X datasheet section on 'Decoupling', inadequate decoupling causes spurious POR events during high-current switching on adjacent I/O pins. For battery-powered designs, the brown-out detect (BOD) can be left enabled at the 2.0 V threshold to prevent code execution at unsafe VDD levels.
Connect the MCLR pin (pin 1) to VDD through a 10 kohm pull-up resistor and a 100 nF capacitor to ground for noise immunity, as recommended in the Microchip PIC16F62X datasheet. Without the capacitor, fast transients on VDD can couple into MCLR and trigger spurious resets. For ICSP programming, expose the MCLR, RB6 (PGC), and RB7 (PGD) pins to an in-line header so a PICkit can program the device in-circuit without removing it.
Do not assume the comparator output pin (C1OUT on RA4) is push-pull - per the PIC16F62X datasheet it is an open-drain output requiring an external pull-up. Forgetting the pull-up is a common source of 'floating comparator output' debug sessions. Similarly, PORTB weak pull-ups are individually programmable via the WPUB register but disabled by default; enable them in firmware if driving a button matrix without external resistors.
When using the HS (high-speed) oscillator mode above 4 MHz, keep the crystal traces short (under 10 mm) and surround them with a ground pour to minimize EMI radiation. For noise-sensitive analog measurements on RA0-RA3, the PIC16F62X datasheet recommends switching adjacent pins to digital mode during ADC conversion to avoid digital-coupling noise. The internal 4 MHz RC oscillator provides +/- 2% accuracy over the /E temp range, sufficient for UART at low baud rates.
Compliance Information
RoHS-compliant lead-free 18-PDIP package per Microchip product page. Not AEC-Q100 qualified - the /E temperature grade is industrial extended, not automotive safety-certified. For AEC-Q100 work, consider PIC16F18313 or PIC16F18855.
