PIC16LF627-04I/SO - 4MHz 1.75KB Flash 8-bit MCU | Microchip
MPN: PIC16LF627-04I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.85 | $3.85 |
| 10 | $3.55 | $35.50 |
| 100 | $3.2 | $320.00 |
| 500 | $2.85 | $1,425.00 |
| 1,000 | $2.55 | $2,550.00 |
PIC16LF627-04I/SO Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (Flash, RAM, EEPROM), and programmable peripherals. The PIC16F62X family is classified as an 8-bit mid-range MCU, sitting within the broader hierarchy: microcontroller -> embedded processor -> semiconductor IC. MCUs are the foundation of embedded systems, executing firmware to read sensors, drive actuators, and communicate with peripherals in everything from consumer appliances to industrial controllers.
Key features of the PIC16LF627-04I/SO include 16 I/O pins with individually programmable direction, a high-current sink/source capability of 25 mA per pin for direct LED drive without external transistors, two on-chip analog comparators, and a programmable on-chip voltage reference (VREF) module. The device integrates a 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 on-chip RC oscillator for reliable operation. Programmable weak pull-ups on PORTB reduce external component count.
Architecturally, the PIC16LF627 uses a Harvard architecture with separate program (Flash) and data (RAM) buses, plus a 14-bit instruction word. The enhanced core supports interrupt handling with a hardware context save, and the integrated USART supports RS-232/RS-485 communication. The internal 4 MHz RC oscillator allows operation without external crystal components, lowering BOM cost in cost-sensitive designs.
Typical applications include low-power remote controls, consumer white goods, automotive interior modules, battery-powered instrumentation, industrial sensor interfaces, and small appliance controllers. Its combination of Flash memory, integrated peripherals, and wide operating voltage makes it ideal for legacy 5 V designs transitioning from older OTP parts. When designing with this MCU, ensure that the MCLR pin is correctly biased (high for normal operation) and that decoupling capacitors are placed close to VDD/VSS. Programming is supported through Microchip's MPLAB X IDE and ICD debuggers, with a broad third-party toolchain ecosystem.
Drop-in alternatives for PIC16LF627-04I/SO — 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 PIC16LF627-04I/SO (same form factor and footprint) — differing in Timers, Package, Core Architecture, Internal Oscillator, Operating Temperature.
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No drop-in alternatives available for this product.
Request AlternativesPIC16LF627-04I/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC RISC (Harvard, 14-bit instruction word) |
| Family | PIC16F62X (PIC16LF627) |
| Program Memory (Flash) | 1.75 KB (1K x 14 words) |
| Data RAM | 224 bytes |
| Data EEPROM | 128 bytes |
| Maximum CPU Frequency | 4 MHz |
| Instruction Execution Time | 200 ns @ 4 MHz |
| Instruction Set Size | 35 single-word instructions |
| I/O Pins | 16 |
| Operating Voltage (VDD) | 2.0 V to 5.5 V |
| Operating Temperature | -40 C to +85 C (Industrial) |
| Timers | Timer0, Timer1, Timer2 |
| Analog Comparators | 2 with programmable VREF |
| Communication | USART (SCI/SPI mode) |
| Package | 18-pin SOIC (7.50 mm width) |
| Mounting Type | Surface Mount |
| MSL Level | 1 (unlimited) |
| RoHS Status | Compliant |
PIC16LF627-04I/SO Pin Configuration
| Pin 1 | RA2/AN2/VREF- — PORTA bit 2 / analog input / VREF- |
| Pin 2 | RA3/AN3/VREF+ — PORTA bit 3 / analog input / VREF+ |
| Pin 3 | RA4/AN4/T0CKI — PORTA bit 4 / analog input / Timer0 clock |
| Pin 4 | RA5/MCLR/VPP — PORTA bit 5 / Master Clear (reset) / programming voltage |
| Pin 5 | VSS — Ground reference |
| Pin 6 | RB0/INT — PORTB bit 0 / external interrupt |
| Pin 7 | RB1/RX/DT — PORTB bit 1 / USART RX / I/O |
| Pin 8 | RB2/TX/CK — PORTB bit 2 / USART TX / clock |
| Pin 9 | RB3/CCP1 — PORTB bit 3 / Capture/Compare/PWM |
| Pin 10 | RB4/PGM — PORTB bit 4 / Low-voltage programming |
| Pin 11 | RB5 — PORTB bit 5 |
| Pin 12 | RB6/T1OSC1/PGC — PORTB bit 6 / Timer1 osc / ICSP clock |
| Pin 13 | RB7/T1OSC2/PGD — PORTB bit 7 / Timer1 osc / ICSP data |
| Pin 14 | VDD — Positive supply voltage (2.0-5.5 V) |
| Pin 15 | OSC2/CLKOUT/RA6 — Oscillator output / PORTB bit 6 |
| Pin 16 | OSC1/CLKIN/RA7 — Oscillator input / PORTB bit 7 |
| Pin 17 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| Pin 18 | RA1/AN1 — PORTA bit 1 / analog input 1 |
Typical Applications
PIC16LF627-04I/SO is suitable for 6 applications: Remote Control Transmitter, Battery-Powered Sensor Node, Industrial Sensor Interface, Consumer Appliance Controller, Automotive Interior Module, LED Lighting Controller.
Remote Control Transmitter
The PIC16LF627-04I/SO suits remote control transmitters because its 2.0-5.5 V operating range supports single 3 V coin-cell battery power, while the internal 4 MHz oscillator eliminates external crystal components to reduce BOM cost. The 16 I/O pins with 25 mA source capability can directly drive IR LEDs without external transistors, and the integrated USART enables status feedback channels. With 1.75 KB of Flash firmware the MCU can implement complex IR protocols (RC5, NEC, Sony SIRC) and button debouncing routines. The integrated WDT with its own RC oscillator survives battery brown-out events during transmission.
Recommended
Battery-Powered Sensor Node
For wireless sensor nodes and IoT edge devices, the PIC16LF627-04I/SO provides the low-power 8-bit processing needed for periodic sensor reads and RF packet assembly. The 224 bytes of RAM accommodate short sensor buffers, while the 2.0-5.5 V VDD range supports direct 2xAA or lithium battery operation without boost converters. Brown-out Detect (BOD) protects against battery droop during TX peaks, and the Watchdog Timer with internal RC oscillator maintains system integrity during deep sleep. The 16 I/O pins can interface SPI sensors, ADC inputs, and UART-connected radio modules like Sub-GHz transceivers.
Recommended
Industrial Sensor Interface
The PIC16LF627-04I/SO fits industrial sensor interface modules thanks to its industrial -40 C to +85 C temperature range and 5 V tolerance on I/O pins. The two integrated analog comparators with programmable VREF can directly process 4-20 mA current loop signals or resistive bridge outputs without external op-amps. The USART in RS-485 mode enables multi-drop industrial networks, while the 1.75 KB Flash supports Modbus RTU or proprietary protocols. The integrated BOD and POR ensure reliable cold-start operation in factory automation environments with noisy 24 V supply rails stepped down to 5 V.
Recommended
Consumer Appliance Controller
In small consumer appliances like coffee makers, blenders, and washing machine sub-modules, the PIC16LF627-04I/SO provides the right balance of cost, peripherals, and reliability. The 16 high-current I/O pins can directly drive relays, solenoids, LED indicators, and seven-segment displays. The 1.75 KB Flash accommodates state-machine firmware for temperature profiling or motor control, while the 128 bytes of EEPROM store user preferences and calibration values across power cycles. The programmable weak pull-ups on PORTB eliminate external resistors for keypad scanning.
Recommended
Automotive Interior Module
The PIC16LF627-04I/SO can serve in non-safety automotive interior modules like dashboard lighting controllers, climate trim panels, and accessory multiplexers. While not AEC-Q100 qualified, its industrial -40 to +85 C range covers most cabin environments and the wide 2.0-5.5 V supply tolerance survives load-dump events when paired with proper input protection. The integrated USART interfaces with body control modules over LIN or proprietary buses, and 16 I/O pins handle LED matrix drive, button inputs, and rotary encoder channels. The Flash memory supports field firmware updates via ICSP.
Recommended
LED Lighting Controller
The PIC16LF627-04I/SO is well-matched to LED lighting controllers and decorative illumination drivers. Its PWM-capable CCP and Timer peripherals generate precise PWM dimming signals, while the 16 I/O pins with 25 mA source/sink drive multiple LED strings directly. The 2.0-5.5 V operating range supports USB-powered LED strips and battery-operated decorative fixtures. With 1.75 KB Flash, firmware can implement color-mixing algorithms, DMX-512 protocol parsing, or music-reactive visualizers. The internal 4 MHz oscillator eliminates crystal cost in price-sensitive consumer lighting.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF627-04I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF627A-I/SO | PIC16LF628-04I/SO | PIC16F627-04I/SO | PIC16LF628A-I/SO |
|---|---|---|---|---|---|
| Package | SOIC-18 | SOIC-18 (same) | SOIC-18 (same) | SOIC-18 (same) | SOIC-18 (same) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 1.75 KB | 1.75 KB | 3.5 KB | 1.75 KB | 3.5 KB |
| Maximum CPU Frequency | 4 MHz | 20 MHz | 4 MHz | 4 MHz | 20 MHz |
| Operating Voltage (VDD) | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 3.0 V to 5.5 V | 2.0 V to 5.5 V |
| I/O Pins | 16 | 16 | 16 | 16 | 16 |
| Data RAM | 224 bytes | 224 bytes | 224 bytes | 224 bytes | 224 bytes |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) |
| CCP Module | No | Yes | No | No | Yes |
| Pin-to-Pin Compatible | Yes (this part) | Yes | Yes | Yes | Yes |
Key Differentiators
- Industrial temperature grade with low-voltage operation (vs PIC16F627-04I/SO)
- Drop-in compatible with larger Flash upgrade (vs PIC16LF628-04I/SO)
- 25 mA I/O for direct LED drive (vs PIC16LF627A-I/SO)
- Integrated USART for serial communication (vs PIC16F84A)
Design Notes
Place a 100 nF decoupling capacitor as close as possible to VDD (pin 14) and a bulk 10 uF tantalum or ceramic on the supply rail. The PIC16LF627-04I/SO has an internal POR that requires a clean VDD rise; if the supply is slow (>1 ms) configure PWRT to extend the reset hold time. Brown-out Detect (BOD) should be enabled for battery-powered applications - the BOD threshold register sets the trigger level relative to VDD.
When using the 18-pin SOIC, route VDD and VSS traces as wide as practical (>=0.5 mm) and place the decoupling cap within 3 mm of the VDD pin. The MCLR/VPP pin (pin 4) requires a 10 kohm pull-up to VDD for normal operation; during ICSP programming, this pin is driven to ~13 V by the programmer. Avoid routing high-frequency signals near OSC1/OSC2 if using an external crystal.
A common mistake is forgetting that the PIC16LF627-04I/SO defaults to using the GP3/MCLR pin as a reset input, not a general-purpose I/O. To use RA5 as an I/O, the MCLRE configuration bit must be cleared in the CONFIG register at programming time. Also note that the 'LF' variant's 2.0 V minimum VDD is incompatible with standard 5 V-only peripherals - verify that downstream devices support 3.3 V operation or use level shifters.
If using the internal 4 MHz RC oscillator (INTRC), leave the OSC1/OSC2 pins (pins 15, 16) configurable as general-purpose I/O by clearing the FOSC configuration bits. For noise-sensitive analog measurements, switch to the internal RC oscillator during ADC reads (to avoid digital switching noise on the supply rail) and return to the crystal after the conversion completes.
Compliance Information
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified - for automotive applications use AEC-Q100 qualified PIC16F or PIC18 family parts. Lead-free and halogen-free per Microchip environmental compliance documentation.
