PIC16LF627-04/SS - 8-bit PIC MCU, 1.75KB Flash, 4MHz SSOP-20 | Microchip
MPN: PIC16LF627-04/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.78 | $1.78 |
| 10 | $1.62 | $16.20 |
| 100 | $1.42 | $142.00 |
| 500 | $1.28 | $640.00 |
| 1,000 | $1.15 | $1,150.00 |
PIC16LF627-04/SS Overview
An 8-bit PIC microcontroller belongs to the RISC (Reduced Instruction Set Computer) family of microcontrollers built on a Harvard architecture, where program and data buses are physically separated. This category of MCU (microcontroller -> microprocessor -> semiconductor -> integrated circuit) executes one instruction per clock cycle and is widely used in cost-sensitive embedded control applications such as consumer appliances, automotive subsystems, and industrial sensor interfaces.
Key specifications include an integrated analog comparator module with programmable on-chip voltage reference (VREF), two analog comparators, programmable input multiplexing from device pins and internal VREF, and externally accessible comparator outputs. The PIC16LF627 also integrates a USART module with RS-232/RS-485 support, a synchronous serial port (SSP) for SPI/I2C, and a 16-bit timer/counter. The LF (low-power) designation indicates an extended operating voltage range down to 2.0 V, making it suitable for battery-powered designs.
The PIC16LF627 uses a Harvard architecture with separate program and data memory, optimizing instruction fetches and data accesses in parallel. Its RISC instruction set includes 35 single-word instructions, enabling compact code generation while maintaining deterministic interrupt response. The device's CMOS technology process delivers low power consumption typical of the PIC16F62X family, with nanoWatt technology for power-managed sleep modes.
Typical applications include remote controls, sensor interfaces, LED lighting controls, low-power telemetry devices, and automotive body electronics. It is frequently used in cost-sensitive designs requiring a USART for communication, on-chip EEPROM for parameter storage, and analog comparator functions for threshold detection.
When designing with this MCU, ensure decoupling capacitors of 0.1uF and 10uF are placed close to VDD pins, and verify that the maximum oscillator frequency rating is respected across the full voltage range. The internal oscillator and WDT (watchdog timer) can eliminate external components in many designs, further reducing BOM cost.
This page synthesizes distributor availability, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC16LF627-04/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 PIC16LF627-04/SS (same form factor and footprint) — differing in Analog Comparators, Core Architecture, Mounting Type, Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF627-04I/SS
✅ Drop-In✓ In Stock
$1.95 / Unit
View Datasheet →PIC16LF627T-04/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF628-04/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF627-04/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC RISC (Harvard) |
| Family | PIC16F62X |
| Program Memory (Flash) | 1.75 KB (1K x 14 words) |
| RAM | 224 bytes |
| EEPROM | 128 bytes |
| Maximum Clock Speed | 4 MHz |
| Operating Voltage Range | 2.0 V to 5.5 V |
| I/O Pins | 16 |
| Package | 20-pin SSOP |
| Mounting Type | Surface Mount |
| Instruction Set | 35 single-word RISC instructions |
| Analog Comparators | 2 |
| Communication Peripherals | USART (RS-232/RS-485), SSP (SPI/I2C) |
| Timers | 16-bit Timer/Counter |
| RoHS Status | Compliant |
PIC16LF627-04/SS Pin Configuration
| Pin 1 | RA2/AN2/CVREF/VREF- — Bidirectional I/O, analog input, comparator VREF output |
| Pin 2 | RA3/AN3/C1OUT — Bidirectional I/O, analog input, comparator 1 output |
| Pin 3 | RA4/AN4/T0CKI — Bidirectional I/O with open-drain option, Timer0 clock input |
| Pin 4 | RA5/AN5/SS — Bidirectional I/O, analog input, SPI slave select |
| Pin 5 | VSS — Ground reference |
| Pin 6 | OSC1/CLKIN — Oscillator crystal input or external clock input |
| Pin 7 | OSC2/CLKOUT — Oscillator crystal output or clock output |
| Pin 8 | RB0/INT — Bidirectional I/O, external interrupt input |
| Pin 9 | RB1/RX/DT — Bidirectional I/O, USART RX or synchronous data line |
| Pin 10 | RB2/TX/CK — Bidirectional I/O, USART TX or synchronous clock |
| Pin 11 | RB3/CCP1 — Bidirectional I/O, Capture/Compare/PWM 1 |
| Pin 12 | RB4/PGM — Bidirectional I/O, LVP programming pin |
| Pin 13 | RB5 — Bidirectional I/O |
| Pin 14 | RB6/PGC — Bidirectional I/O, ICSP clock pin |
| Pin 15 | RB7/PGD — Bidirectional I/O, ICSP data pin |
| Pin 16 | VDD — Positive supply voltage |
| Pin 17 | RA0/AN0 — Bidirectional I/O, analog input 0 |
| Pin 18 | RA1/AN1 — Bidirectional I/O, analog input 1 |
| Pin 19 | RA6/OSC2/CLKOUT — Bidirectional I/O or alternate oscillator output (multiplexed) |
| Pin 20 | RA7/OSC1/CLKIN — Bidirectional I/O or alternate oscillator input (multiplexed) |
Typical Applications
PIC16LF627-04/SS is suitable for 6 applications: Remote Control and IR Transmitter, Battery-Powered Sensor Node, LED Lighting Control, Industrial Control and Sensor Interface, Automotive Body Electronics, Consumer Appliance Control.
Remote Control and IR Transmitter
The PIC16LF627-04/SS is well suited to handheld infrared remote controls because its low-voltage CMOS design (2.0 V to 5.5 V) supports two AA alkaline cells directly, while the integrated USART and SSP peripherals handle IR protocol encoding. The 16 I/O pins drive LED indicators and keypad scanning without extra drivers, and nanoWatt sleep modes extend battery life to multi-year standby. Programming uses only 1.75 KB of Flash for typical RC5/RC6 or NEC code tables.
Recommended
Battery-Powered Sensor Node
For wireless sensor nodes and IoT edge devices, the PIC16LF627-04/SS offers 2.0 V operation with deep-sleep currents in the microamp range, plus 128 bytes of EEPROM for storing calibration constants. The two integrated analog comparators threshold-detect sensor signals without an ADC, freeing the CPU for protocol handling. Combined with an external sub-GHz transceiver, it forms a complete battery-powered telemetry platform.
Recommended
LED Lighting Control
In DMX-controlled or analog LED dimmer designs, the PIC16LF627-04/SS uses its high-current sink/source I/O pins (25 mA per pin) to directly drive LED strings without MOSFET drivers. The 16-bit timer/counter provides hardware PWM generation for smooth dimming, while the SSP peripheral handles I2C-controlled LED driver ICs. Its 4 MIPS performance allows smooth 8-bit gamma dimming with multiple channels.
Recommended
Industrial Control and Sensor Interface
Industrial applications benefit from the PIC16LF627-04/SS's two analog comparators with programmable VREF for threshold detection on 4-20 mA loops and analog sensors. The integrated USART with RS-485 support directly interfaces to industrial fieldbus nodes. The 128-byte EEPROM stores calibration and configuration data, while the watchdog timer ensures reliable recovery from faults in noisy industrial environments.
Recommended
Automotive Body Electronics
Automotive body modules such as seat controllers, mirror adjusters, and lighting controllers use the PIC16LF627-04/SS for distributed intelligence. Its 5.5 V operation tolerates 12 V battery transients with external clamping. The USART interfaces to LIN bus controllers for in-vehicle networking, and the 35-instruction RISC set enables deterministic response for safety-critical control loops. For AEC-Q100 qualified variants, the PIC16LF627-04I/SS industrial temperature grade is preferred.
Recommended
Consumer Appliance Control
White goods, coffee machines, and small kitchen appliances commonly use the PIC16LF627-04/SS for primary control because of its integrated peripherals (USART, comparators, timers) that replace multiple discrete components. The 16 I/O pins scan keypads, drive relays through transistors, and read thermistors via the analog comparator with on-chip VREF, keeping BOM cost below competing solutions. The 1.75 KB Flash supports typical state-machine firmware for these applications.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF627-04/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF627-04I/SS | PIC16LF627T-04/SS | PIC16LF628-04/SS | PIC16F627-04/SS |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-pin SSOP | 20-pin SSOP | 20-pin SSOP | 20-pin SSOP | 20-pin SSOP |
| Architecture | 8-bit PIC RISC | 8-bit PIC RISC | 8-bit PIC RISC | 8-bit PIC RISC | 8-bit PIC RISC |
| Program Memory (Flash) | 1.75 KB | 1.75 KB | 1.75 KB | 3.5 KB | 1.75 KB |
| RAM | 224 bytes | 224 bytes | 224 bytes | 224 bytes | 224 bytes |
| Maximum Clock Speed | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 20 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 | 4.5 V to 5.5 V |
| Temperature Range | Commercial (0C to +70C) | Industrial (-40C to +85C) | Commercial (0C to +70C) | Commercial (0C to +70C) | Commercial (0C to +70C) |
Key Differentiators
- Extended low-voltage operation down to 2.0 V (vs 4.5 V for F variant) (vs PIC16F627-04/SS)
- Industrial temperature grade option with identical package and pinout (vs PIC16LF627-04I/SS)
- Drop-in upgrade path to doubled Flash memory (vs PIC16LF628-04/SS)
Design Notes
Place a 0.1 uF decoupling capacitor as close as possible to the VDD pin (pin 16) on the PIC16LF627-04/SS, with a 10 uF bulk capacitor at the board entry point. The LF variant operates down to 2.0 V, but switching noise from relay coils or LED strings should be suppressed by RC snubbers to prevent spurious resets. Verify VDD ramp time is under the datasheet's 72 ms maximum to ensure proper Power-on Reset.
When using the SSOP-20 footprint, route the OSC1/OSC2 traces short and symmetrically to keep the internal oscillator stable. The MCLR/VPP pin (pin 4) requires its own decoupling and should not be left floating - tie it to VDD through a 10 kohm resistor for normal operation. Avoid running noisy digital traces under the analog comparator inputs (RA0-RA3) to minimize threshold drift in precision applications.
Do not exceed the 4 MHz maximum clock rating of the PIC16LF627-04/SS - the -04 suffix enforces this limit. For designs needing higher performance, select the PIC16LF627-20/SS (20 MHz) variant. The I/O pins source/sink up to 25 mA but the combined VDD current is limited - refer to the datasheet's 'Absolute Maximum Ratings' to avoid latch-up. Always configure unused pins as outputs to prevent floating input current draw.
Compliance Information
RoHS and lead-free compliant per Microchip product page. Not AEC-Q100 qualified - for automotive, use PIC16LF627-04I/SS industrial grade and add external ESD protection. Halogen-free status not explicitly published in the verified datasheet content provided.
