PIC16LF627-04I/SS - 8-Bit 4MHz MCU 1.75KB Flash 16 I/O | Microchip
MPN: PIC16LF627-04I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.2 | $3.20 |
| 10 | $2.85 | $28.50 |
| 100 | $2.5 | $250.00 |
| 500 | $2.2 | $1,100.00 |
| 1,000 | $1.95 | $1,950.00 |
PIC16LF627-04I/SS Overview
An 8-bit microcontroller (MCU) is a small computing system-on-chip integrating a CPU, program memory (ROM/FLASH), data memory (RAM), and peripheral interfaces on a single die. MCUs belong to the broader hierarchy of microprocessors -> embedded processors -> microcontrollers -> 8-bit MCUs. The "PIC" architecture refers to Microchip's Peripheral Interface Controller family, which uses a reduced instruction set (RISC) and Harvard memory organization, popular in low-power and cost-sensitive embedded applications.
Key features of the PIC16LF627-04I/SS include an on-chip 10-bit ADC-free analog comparator module with two comparators and a programmable on-chip voltage reference (VREF), a USART module supporting RS-232/RS-485 communication, two 8-bit timers and one 16-bit timer, an internal oscillator option, and an integrated voltage supervisor. The "LF" prefix denotes the low-voltage (2.0-5.5V) variant of the PIC16F627 family. Industrial temperature grade (-40C to +85C) and in-circuit serial programming (ICSP) support make this part well suited to harsh environments.
The PIC16LF62X architecture uses a 14-bit instruction word with a single accumulator (W register) and a 35-instruction set, enabling compact code generation. Its pipeline architecture fetches and executes instructions in a single cycle except for program branches, giving a typical throughput of 4 MIPS at 4 MHz clock. The wide operating voltage range allows direct connection to single-cell lithium, two-cell AA, or regulated 5V rails.
Typical applications include low-power remote sensors, battery-powered consumer devices, simple motor control, LED display drivers, and industrial control subsystems. The on-chip analog comparator and VREF are particularly useful for threshold detection without external analog components.
Designers should note that the '04' suffix designates a 4 MHz maximum oscillator frequency variant; higher-speed designs should consider the PIC16LF627-20I/SS (20 MHz). For drop-in upgrades with more memory, the PIC16F628A family is pin-compatible and provides 2x program memory with USART enhancements.
Drop-in alternatives for PIC16LF627-04I/SS — 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/SS (same form factor and footprint) — differing in Core Architecture, Package, Timers, Mounting Type, Analog Comparators.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF627-04I/SO
✅ Drop-In✓ In Stock
$2.55 / Unit
View Datasheet →PIC16LF627-04I/P
✅ Drop-In✓ In Stock
$1.23 / Unit
View Datasheet →PIC16LF627-04/P
✅ Drop-In✓ In Stock
$1.05 / Unit
View Datasheet →PIC16F627A-I/SS
✅ Drop-In✓ In Stock
$1.12 / Unit
View Datasheet →PIC16LF627T-04I/SS
✅ Drop-In✓ In Stock
$1.78 / Unit
View Datasheet →PIC16LF627AT-I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF627-04I/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit RISC (Harvard) |
| Program Memory Size | 1.75 KB (1K x 14) FLASH |
| RAM Size | 224 bytes |
| EEPROM Size | 128 bytes |
| Maximum Clock Frequency | 4 MHz |
| Operating Voltage Range | 2.0 V to 5.5 V |
| Number of I/O Pins | 16 |
| Number of ADC Channels | 0 (comparator-based analog) |
| Timers | 2 x 8-bit, 1 x 16-bit |
| Communication Interfaces | USART, ICSP |
| Analog Comparators | 2 with programmable VREF |
| On-chip Voltage Reference | Yes (programmable) |
| Instruction Set Width | 14-bit, 35 instructions |
| Operating Temperature Range | -40 C to +85 C (Industrial) |
| Package Type | 20-pin SSOP |
| Package Code | SSOP20 |
| Mounting Type | Surface Mount (Gull Wing) |
| RoHS Status | Compliant |
| Lead-Free | Yes |
PIC16LF627-04I/SS Pin Configuration
| Pin 1 | RA2/AN2/VREF — PORTA bit 2 / analog input / voltage reference output |
| Pin 2 | RA3/AN3/CMP1 — PORTA bit 3 / analog input / comparator 1 output |
| Pin 3 | RA4/AN4/T0CKI — PORTA bit 4 / analog input / Timer 0 clock input |
| Pin 4 | RA5/MCLR/VPP — PORTA bit 5 / Master Clear reset (active low) / programming voltage |
| Pin 5 | VSS — Ground reference |
| Pin 6 | RB0/INT — PORTB bit 0 / external interrupt input |
| Pin 7 | RB1/RX/DT — PORTB bit 1 / USART RX / data |
| Pin 8 | RB2/TX/CK — PORTB bit 2 / USART TX / clock |
| Pin 9 | RB3/CCP1 — PORTB bit 3 / Capture/Compare/PWM 1 output |
| Pin 10 | RB4/PGM — PORTB bit 4 / low-voltage programming input |
| Pin 11 | RB5 — PORTB bit 5 |
| Pin 12 | RB6/T1OSO/T1CKI — PORTB bit 6 / Timer 1 oscillator output / clock input |
| Pin 13 | RB7/T1OSI — PORTB bit 7 / Timer 1 oscillator input |
| Pin 14 | VSS — Ground reference |
| Pin 15 | OSC2/CLKOUT — Oscillator output / clock output |
| Pin 16 | OSC1/CLKIN — Oscillator input / external clock input |
| Pin 17 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| Pin 18 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Positive power supply |
Typical Applications
PIC16LF627-04I/SS is suitable for 6 applications: Battery-Powered Sensor Nodes, LED Display and Sign Controllers, Industrial Threshold Detection, Simple Motor Control, Consumer Remote Controls, Automotive Body Electronics (Non-Safety).
Battery-Powered Sensor Nodes
The PIC16LF627-04I/SS fits battery-powered wireless sensor nodes where its 2.0V minimum operating voltage allows direct connection to a single CR2032 lithium coin cell or two AA alkaline cells, while its 4 MHz maximum clock and RISC architecture keep active current draw to a few hundred microamperes. The 16 I/O pins with 25 mA source/sink capability allow direct LED indicator drive and digital sensor interfacing without external drivers. The 1.75 KB FLASH holds typical sensor-fusion or BLE-beacon firmware, and the on-chip analog comparators with programmable VREF enable threshold-based battery-voltage monitoring without an external ADC. Compared to higher-end Cortex-M0+ MCUs the PIC16LF627-04I/SS offers roughly 1/3 the sleep current and far simpler programming via ICSP, making it ideal for cost-sensitive remote sensor designs.
Recommended
LED Display and Sign Controllers
The PIC16LF627-04I/SS is well suited for LED matrix and segment-display controllers thanks to its 16 high-current I/O pins rated at 25 mA source/sink per pin. Designers can directly multiplex a 4-digit 7-segment display or a 4x4 LED matrix without external driver transistors. The integrated USART enables daisy-chaining multiple display nodes via RS-485 for larger signage installations. The wide 2.0-5.5V supply range supports both 3.3V and 5V LED configurations. The 1.75 KB program memory comfortably holds lookup tables for character fonts, brightness PWM tables, and communication protocols. Compared to a CPLD-based LED driver solution, the PIC16LF627-04I/SS offers in-system reprogrammability via ICSP for fast pattern updates.
Recommended
Industrial Threshold Detection
The PIC16LF627-04I/SS is ideal for industrial threshold and limit-switch monitoring thanks to its two on-chip analog comparators with a programmable voltage reference (VREF). This allows direct interfacing with thermistor, photodiode, or strain-gauge sensor networks without an external ADC IC, reducing BOM cost and PCB area. The industrial -40C to +85C operating temperature range meets harsh-environment requirements for factory-floor equipment. The USART module supports RS-232 or RS-485 reporting back to a central PLC. Compared to a discrete op-amp + ADC solution, the PIC16LF627-04I/SS integrates the comparator, VREF, and processing in one package, simplifying manufacturing and improving reliability in dusty, vibration-prone environments.
Recommended
Simple Motor Control
The PIC16LF627-04I/SS handles low-cost motor control applications such as small DC-fan speed regulation, RC-servo driving, or brushed-DC motor PWM control. Its two 8-bit timers plus one 16-bit timer provide the PWM channels needed for motor drive signals, while the high-current I/O pins can directly interface with small MOSFET gate drivers. The 4 MHz clock at 4 MIPS provides sufficient instruction throughput for sensorless back-EMF commutation at low RPM. Compared to dedicated motor-controller ICs, the PIC16LF627-04I/SS offers more general-purpose I/O for user interfaces and HMI buttons at a lower unit cost, while the on-chip comparators enable zero-crossing back-EMF detection for sensorless commutation in cost-sensitive toys and appliances.
Recommended
Consumer Remote Controls
The PIC16LF627-04I/SS is well matched to IR/RF remote-control applications where low cost, low standby power, and small PCB footprint are paramount. The 2.0-5.5V operation allows direct connection to a single CR2032 cell, and the SSOP-20 package saves board area compared to DIP alternatives. The USART plus two analog comparators can be repurposed to modulate an IR LED or generate sub-GHz RF carrier with bit-banging, eliminating a dedicated transmitter IC. The 1.75 KB FLASH holds typical NEC, RC5, or proprietary remote-control protocol stacks. Compared to ASIC encoder ICs, the PIC16LF627-04I/SS offers in-system firmware updates and the ability to support multiple protocols via simple button-press configuration.
Recommended
Automotive Body Electronics (Non-Safety)
The PIC16LF627-04I/SS handles non-safety automotive body-electronics applications such as interior lighting controllers, simple window switches, seat-position memory modules, or auxiliary lighting timers. The industrial -40C to +85C temperature rating covers cabin environments. The 16 high-current I/O pins drive relays and small solenoids directly, while the on-chip comparators monitor battery voltage for low-voltage cutoff. Note that for under-hood or safety-critical applications, AEC-Q100 qualified parts like the PIC16F1826-I/SS are recommended. Compared to relay-logic or discrete-555-timer designs, the PIC16LF627-04I/SS provides configurable behavior, remote diagnostics via LIN bus, and easy firmware updates for late-stage feature changes in automotive trim-level variants.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF627-04I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF627-04I/SO | PIC16LF627-04I/P | PIC16LF627-04/P | PIC16F627A-I/SS | PIC16LF627T-04I/SS |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | SSOP-20 | SOIC-20 | PDIP-20 | PDIP-20 | SSOP-20 | SSOP-20 |
| Program Memory | 1.75 KB FLASH | 1.75 KB FLASH | 1.75 KB FLASH | 1.75 KB FLASH | 1.75 KB FLASH | 1.75 KB FLASH |
| Maximum Clock | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 20 MHz | 4 MHz |
| Operating Voltage | 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 |
| Temperature Grade | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Commercial (0C to +70C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) |
| Number of I/O | 16 | 16 | 16 | 16 | 16 | 16 |
| Analog Comparators | 2 with VREF | 2 with VREF | 2 with VREF | 2 with VREF | 2 with VREF | 2 with VREF |
| Approximate Price @ 1000pc | $1.95 | $1.90 | $2.10 | $1.85 | $2.30 | $1.95 |
Key Differentiators
- Industrial temperature grade with low-voltage operation (vs PIC16LF627-04/P)
- Higher clock speed headroom for future code growth (vs PIC16F627A-I/SS)
- Compact SSOP-20 footprint saves board area (vs PIC16LF627-04I/P (PDIP-20))
Design Notes
Estimated: The SSOP-20 package has a 0.65 mm pitch, which is at the practical limit for hand-soldering but easily handled by standard reflow profiles. A 4-layer PCB with a continuous ground plane beneath the MCU is recommended for EMI-sensitive applications. Place the ICSP programming header (5-pin standard: VPP/VDD/VSS/PGD/PGC) within 50 mm of the MCU pins to keep ICSP cable capacitance low and reliable in-circuit programming. Per Microchip guidelines, a 10 kohm pull-up on MCLR is mandatory for normal operation.
Estimated: When operating at 4 MHz from a 3.3 V supply, the typical active current is approximately 1-2 mA depending on which peripherals are enabled. For battery-powered designs, leverage the PIC16LF627-04I/SS SLEEP mode (current typically < 1 uA) and wake via Watchdog Timer or external interrupt. Brown-Out Reset (BOR) should be enabled to ensure clean startup at low battery voltages. Per Microchip datasheet section 14, the analog comparators draw approximately 40 uA each when active - disable them in SLEEP for maximum battery life.
The '04' suffix in PIC16LF627-04I/SS denotes the 4 MHz oscillator variant - do not configure the device with crystal or external oscillator frequencies above 4 MHz, or the FLASH memory access timing will fail and cause erratic program execution. Configuration bits must be set correctly for the chosen oscillator mode (HS, XT, LP, RC, or INTOSC) per datasheet section 14. The analog comparator output pins are shared with PORTA functions; when using the comparator output to drive external circuitry, ensure the corresponding TRISA bit is configured as input to avoid contention with the digital output driver.
Estimated: Place a 100 nF decoupling capacitor as close as possible to the VDD pin (pin 20) and a 10 uF bulk capacitor at the board power entry point. For designs using the internal oscillator, keep the OSC1/OSC2 traces short and avoid routing high-frequency signals adjacent to them to prevent crosstalk. The MCLR/VPP pin requires special routing - keep the trace short to the pull-up resistor and ICSP header to minimize capacitive loading that can prevent successful programming voltage rise time.
Compliance Information
RoHS compliant per Microchip product page; lead-free finish standard. Not AEC-Q100 qualified - for AEC-Q100 automotive applications, migrate to PIC16F1826 family. Conflict-minerals statement available from Microchip.
