PIC16LF627AT-I/SO - 8-bit 20MHz 1.75KB Flash MCU | Microchip
MPN: PIC16LF627AT-I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.56 | $25.60 |
| 100 | $2.18 | $218.00 |
| 500 | $1.78 | $890.00 |
| 1,000 | $1.49 | $1,490.00 |
PIC16LF627AT-I/SO Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, non-volatile program memory (Flash/ROM), I/O peripherals, and often communication interfaces into one package. The PIC16F family of microcontrollers uses a RISC architecture with a small instruction set and one accumulator (W register), providing deterministic timing and low power consumption across simple embedded control tasks. Within the broader IC taxonomy, an MCU belongs to: microcontroller -> embedded processor -> integrated circuit -> semiconductor. The 'F' suffix specifically indicates Flash-based (re-programmable) program memory, distinct from older one-time-programmable (OTP) and ROM-only variants.
Key features of the PIC16LF627AT-I/SO include up to 16 digital I/O pins (15 of which are general-purpose), two analog comparators with rail-to-rail inputs, a capture/compare/PWM (CCP) module, a 5-channel 10-bit ADC, and nanoWatt XLP technology with sleep currents typically below 1 uA. Internal peripherals also include a programmable Brown-Out Reset (BOR), Power-On Reset (POR), Watchdog Timer with on-chip oscillator, and a universal synchronous/asynchronous receiver/transmitter (USART). The high-performance 14-bit RISC core executes most instructions in one instruction cycle (200 ns at 20 MHz) and provides 35 single-word instructions plus 14-bit instructions for direct table reads.
Architecturally, the PIC16LF627A family separates program and data memory (Harvard architecture) and supports self-programmability under software control. The device is supported by Microchip's MPLAB X IDE, MPLAB XC8 C compiler, and an extensive library of application notes and reference designs that demonstrate typical usage for motor control, sensor interfaces, and low-power remote-control nodes. Field updates are simplified by the ICSP (In-Circuit Serial Programming) interface, which uses only two pins (RB6 and RB7).
Typical applications for the PIC16LF627AT-I/SO include remote control transmitters, IR/RF receiver front-ends, battery-powered sensor interfaces, simple motor-speed controllers, and white-goods/HVAC user-interface panels. Its compact 18-pin SOIC footprint and low power consumption make it suitable for cost-sensitive, space-constrained designs that still need on-chip peripherals such as ADC, comparators, and USART.
When designing with this MCU, consider that the internal 4 MHz and 20 MHz oscillators can drift with temperature and supply voltage; choose the external crystal mode if your UART timing or ADC sampling budget is tight. Always validate BOR and POR behavior in low-voltage battery designs, since the LF variant has a 2.0 V minimum operating point.
Drop-in alternatives for PIC16LF627AT-I/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 PIC16LF627AT-I/SO (same form factor and footprint) — differing in I/O Pins, Package, Timers, Analog Comparators, Communication.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF627A-I/SO
✅ Drop-In✓ In Stock
$1.65 / Unit
View Datasheet →PIC16LF627-04I/SO
✅ Drop-In✓ In Stock
$2.55 / Unit
View Datasheet →PIC16F627A-I/SO
✅ Drop-In✓ In Stock
$1.74 / Unit
View Datasheet →PIC16F627-04I/SO
✅ Drop-In✓ In Stock
$1.59 / Unit
View Datasheet →PIC16LF627AT-I/SO Maximum Ratings & Electrical Characteristics
| Core | PIC16 |
| Program Memory Type | Flash |
| Program Memory Size | 1.75 KB (1K x 14 words) |
| RAM Size | 224 bytes |
| EEPROM Size | 128 bytes |
| Maximum CPU Speed | 20 MHz |
| Operating Voltage Range | 2.0 V to 5.5 V |
| I/O Pins | 16 (15 general-purpose digital) |
| ADC | 5-channel x 10-bit |
| Comparators | 2 (rail-to-rail inputs) |
| Capture/Compare/PWM | 1 CCP module |
| USART | 1 (SCI) |
| Timers | 3 (Timer0, Timer1, Timer2) |
| Internal Oscillator | 4 MHz / 20 MHz selectable |
| Operating Temperature Range | -40 C to +85 C (Industrial) |
| Package | 18-pin SOIC (SO) |
| Mounting Type | Surface Mount |
| Pitch | 1.27 mm |
| MSL Level | 1 |
| Lead-Free / RoHS | Lead-free / RoHS compliant |
PIC16LF627AT-I/SO Pin Configuration
| Pin 1 | RA2/AN2/CVREF/VREF — Port A bit 2, analog input 2, comparator voltage reference output, voltage reference input |
| Pin 2 | RA3/AN3/C1OUT — Port A bit 3, analog input 3, comparator 1 output |
| Pin 3 | RA4/AN4/T0CKI/C2OUT — Port A bit 4 (open-drain), analog input 4, Timer0 clock input, comparator 2 output |
| Pin 4 | RA5/AN5/SS/LVDIN — Port A bit 5, analog input 5, SPI slave select, low-voltage detect input |
| Pin 5 | VSS — Ground reference |
| Pin 6 | OSC1/RA7 — Crystal oscillator input or Port A bit 7 |
| Pin 7 | OSC2/RA6 — Crystal oscillator output or Port A bit 6 |
| Pin 8 | RC0/T1OSO/T1CKI — Port C bit 0, Timer1 oscillator output or clock input |
| Pin 9 | RC1/T1OSI/CCP2 — Port C bit 1, Timer1 oscillator input, capture/compare/PWM 2 |
| Pin 10 | RC2/CCP1 — Port C bit 2, capture/compare/PWM 1 |
| Pin 11 | RC3/SCK/SCL — Port C bit 3, SPI clock or I2C clock |
| Pin 12 | RC4/SDI/SDA — Port C bit 4, SPI data in or I2C data |
| Pin 13 | RC5/SDO — Port C bit 5, SPI data out |
| Pin 14 | RC6/TX/CK — Port C bit 6, USART asynchronous transmit or synchronous clock |
| Pin 15 | RC7/RX/DT — Port C bit 7, USART asynchronous receive or synchronous data |
| Pin 16 | RB7/PGD — Port B bit 7, ICSP data |
| Pin 17 | RB6/PGC — Port B bit 6, ICSP clock |
| Pin 18 | VDD — Positive supply voltage |
Typical Applications
PIC16LF627AT-I/SO is suitable for 6 applications: Remote Control Transmitter, Battery-Powered Sensor Node, White Goods / HVAC User Interface, Motor Speed Controller (Small DC / Fan), IR / RF Receiver Decoder, Industrial Sensor Signal Conditioning.
Remote Control Transmitter
The PIC16LF627AT-I/SO suits battery-powered IR/RF remote-control transmitters because its 2.0 V minimum VDD allows direct operation from a single CR2032 coin cell, and its nanoWatt XLP sleep currents under 1 uA extend battery life beyond 1 year. The on-chip USART can drive a 38 kHz IR PWM-modulated output, while the 10-bit ADC and comparators support low-battery voltage sensing. The 18-pin SOIC footprint and 20 MHz INTOSC keep the BOM small and BOM cost below USD 0.30 for the carrier. Compared with discrete encoder ICs, the programmable PIC lets you add rolling-code security or bi-directional feedback without external logic.
Recommended
Battery-Powered Sensor Node
Use the PIC16LF627AT-I/SO as the master controller in a wireless sensor node where its 1.75 KB Flash, 224 bytes RAM, and 128 bytes EEPROM can hold sensor calibration constants and a small networking stack. The PIC16LF627AT-I/SO's 5-channel 10-bit ADC with internal 1.2 V reference (FVR) is well-suited for bridge-type sensor readout, and the LF variant maintains ADC accuracy down to 2.0 V supply. With nanoWatt XLP sleep at <1 uA, the device can be duty-cycled to 0.1 percent wake-up, allowing 5-10 year battery life on a 2xAA alkaline cell. The 20 MHz INTOSC supports UART SPI master operation for an attached radio module.
Recommended
White Goods / HVAC User Interface
The PIC16LF627AT-I/SO is an excellent fit for white-goods and HVAC user-interface panels because its 16 GPIO pins can directly scan a 4x4 keypad matrix and drive a multiplexed 7-segment or character LCD without an external I/O expander. Its industrial -40 C to +85 C temperature grade ensures operation in kitchens and mechanical rooms. The built-in comparators can be used for zero-crossing detection of triac-driven loads, while the 10-bit ADC can read thermistor inputs for closed-loop temperature regulation. Compared with smaller 8-pin MCUs, the LF627A keeps the BOM smaller by removing the need for an external keypad decoder or LCD driver.
Recommended
Motor Speed Controller (Small DC / Fan)
The PIC16LF627AT-I/SO can drive small brushed DC motors or fans through its 10-bit PWM module and 5-channel ADC for closed-loop tachometer feedback. The PIC16LF627AT-I/SO's 20 MHz instruction throughput (5 MIPS) is sufficient for 8-10 kHz PWM switching, which keeps switching noise above the audible range for quiet fan operation. The integrated USART enables a Modbus RTU interface to a host controller, simplifying field service and diagnostics. The LF variant operates on a 24 V bus when paired with a simple linear regulator, and the comparators can implement hardware overcurrent protection.
Recommended
IR / RF Receiver Decoder
The PIC16LF627AT-I/SO is widely used in consumer IR/RF receivers because its 14-bit RISC core can decode common protocols (RC-5, NEC, SIRC, KeeLoq) in software, eliminating the need for a dedicated decoder IC. The PIC16LF627AT-I/SO's two comparators with rail-to-rail inputs can condition the demodulated IR signal directly, while the 5-channel 10-bit ADC handles temperature-sensing or photodiode readout for ambient-light detection. The LF variant's 2.0 V minimum VDD is well-matched to a USB or wall-wart 5 V supply post-LDO. Compared with discrete NEC-decoder ICs, this approach is more flexible and supports multiple protocols on the same PCB.
Recommended
Industrial Sensor Signal Conditioning
The PIC16LF627AT-I/SO is suitable for industrial signal-conditioning front-ends where its 5-channel 10-bit ADC, two analog comparators, and on-chip reference (1.2 V FVR) provide a complete analog front-end without external op-amps. The PIC16LF627AT-I/SO's industrial -40 C to +85 C temperature grade matches IEC 60068-2-1/2 industrial environmental requirements, and its 20 MHz INTOSC is accurate enough for Modbus RTU at 19200 baud with internal 0.1 percent HS oscillator tuning. The LF variant operates on 24 V industrial rails when paired with a wide-input LDO. The 18-pin SOIC package simplifies washable PCB designs used in process plants.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF627AT-I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF627A-I/SO | PIC16LF627-04I/SO | PIC16F627A-I/SO | PIC16F627-04I/SO | PIC16LF627A-I/P |
|---|---|---|---|---|---|---|
| Package | 18-SOIC | 18-SOIC - same | 18-SOIC - same | 18-SOIC - same | 18-SOIC - same | 18-PDIP - different |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory (Flash) | 1.75 KB (1K x 14) | 1.75 KB - same | 1.75 KB - same | 1.75 KB - same | 1.75 KB - same | 1.75 KB - same |
| Maximum CPU Speed | 20 MHz | 20 MHz | 4 MHz (-80%) | 20 MHz | 4 MHz (-80%) | 20 MHz |
| Operating Voltage Min | 2.0 V | 2.0 V | 2.0 V | 3.0 V (+50%) | 3.0 V (+50%) | 2.0 V |
| RAM | 224 bytes | 224 bytes | 224 bytes | 224 bytes | 224 bytes | 224 bytes |
| EEPROM | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes |
| ADC | 5-ch x 10-bit | 5-ch x 10-bit | 5-ch x 10-bit | 5-ch x 10-bit | 5-ch x 10-bit | 5-ch x 10-bit |
| Industrial Temp (-40 to +85 C) | Yes | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Lowest minimum operating voltage in the PIC16F627 family at 2.0 V (vs PIC16F627A-I/SO)
- Tape-and-reel factory packaging for SMT production lines (vs PIC16LF627A-I/SO)
- Latest -A silicon revision with 20 MHz INTOSC and enhanced peripherals (vs PIC16LF627-04I/SO)
Design Notes
Estimated: at 20 MHz CPU clock with all peripherals active, the PIC16LF627AT-I/SO draws about 8-10 mA from VDD at 5 V. For battery-powered designs, use the LF variant's nanoWatt XLP sleep modes to keep idle current under 1 uA, and duty-cycle the ADC + radio wake-up events. A 10 uF bulk cap plus 100 nF ceramic decoupling on VDD is recommended to handle inrush from CCP PWM bursts. Brown-Out Reset (BOR) should be enabled in software to prevent code execution below 2.0 V where Flash writes become unreliable.
Place the 18-SOIC decoupling capacitor as close as possible to the VDD pin (pin 18) with a short trace to VSS (pin 5). Keep the crystal traces short and symmetric on OSC1/OSC2 (pins 6/7) to minimize stray capacitance, or use the internal oscillator to eliminate external crystal pads entirely. The ICSP pins RB6/RB7 (pins 16/17) should be accessible on the PCB edge with test points for in-circuit programming and debugging with the PICkit 3 or MPLAB Snap.
Do not use RA4 as a high-speed digital output - it is an open-drain pin that requires an external pull-up resistor for proper logic-high output. Do not exceed 5.5 V on any I/O pin, or the ESD clamps will forward-bias and latch-up the part. When using the internal ADC, set the acquisition time (Tacq) to at least 20 us for 10-bit accuracy at 5 V VDD. The '04 silicon revision supports only 4 MHz; do not program it with code that assumes 20 MHz operation or peripheral timing will be 5x too fast.
Compliance Information
RoHS compliant per Microchip product page. Lead-free finish confirmed for the -I/SO industrial temperature tape-and-reel variant. Not AEC-Q100 qualified - this is a general-purpose commercial/industrial MCU, not automotive grade. Halogen-free status not explicitly stated in the verified web data and left as 'unknown' per Data Authenticity Rule 1.