PIC16LF627T-04I/SO - 4MHz 8-bit Flash MCU, 1.75KB | Microchip
MPN: PIC16LF627T-04I/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.57 | $25.70 |
| 100 | $2.21 | $221.00 |
| 500 | $1.92 | $960.00 |
| 1,000 | $1.68 | $1,680.00 |
PIC16LF627T-04I/SO Overview
What is an 8-bit flash microcontroller? An 8-bit flash microcontroller is a small single-chip computer built around an 8-bit data path, with non-volatile flash program memory that can be re-written in-circuit. The PIC16LF627T sits within the broader hierarchy: microcontroller -> embedded MCU -> 8-bit MCU -> PIC16 family -> PIC16F6xx sub-family, where 'LF' denotes a low-voltage (2.0-3.6 V typical) variant optimized for battery-powered designs. Flash-based MCUs replaced older OTP and ROM parts because they support field firmware updates and shorter development cycles.
Key features include a wide operating voltage range of 2.0 V to 5.5 V (the LF prefix), a 4 MHz internal oscillator option, two analog comparators with a programmable on-chip voltage reference, a Watchdog Timer with its own internal RC oscillator, Power-on Reset, Brown-out Detect, and Power-up Timer. The 16 I/O pins can be individually configured with weak programmable pull-ups on PORTB, and the device supports in-circuit serial programming (ICSP) for field updates. Two 8-bit and one 16-bit timer/counter modules provide flexible event timing.
Architecturally, the PIC16LF627 uses a Harvard RISC architecture with a 14-bit instruction word and a single accumulator (W) plus 224-byte data RAM. The integrated USART (SCI) with dedicated baud-rate generator simplifies asynchronous serial communication, while the analog comparator block enables threshold detection and small-signal conditioning without external op-amps. The internal 4 MHz RC oscillator reduces BOM cost by eliminating an external crystal in many designs, though an external crystal/oscillator mode remains available for timing-critical applications.
Typical applications include battery-powered sensor nodes, simple appliance control, IR remote transmitters/receivers, low-cost LED controllers, automotive body electronics (non-safety), and industrial monitoring where cost and low quiescent current dominate design priorities. The 'LF' voltage range (down to 2.0 V) makes it well-suited to 2xAA or coin-cell powered devices.
When designing with this MCU, remember that the 'T' suffix denotes tape-and-reel packaging, the '04' speed grade indicates the 4 MHz maximum instruction rate, and the 'I' indicates the industrial -40C to +85C temperature range. Code-protect fuses should be configured for production units to prevent firmware readout.
This page synthesizes distributor pricing, drop-in PIC16F6xx alternatives, and practical design notes not found in the manufacturer datasheet alone, providing a 360-degree reference for engineers selecting, sourcing, and qualifying this part.
Drop-in alternatives for PIC16LF627T-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 PIC16LF627T-04I/SO (same form factor and footprint) — differing in Package, Timers, Communication, I/O Pins, Internal Oscillator.
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Request AlternativesPIC16LF627T-04I/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC RISC (Harvard, 14-bit instruction word) |
| Family | PIC16F6xx (PIC16LF627 sub-family) |
| Maximum CPU Frequency | 4 MHz |
| Program Memory (Flash) | 1.75 KB (1K x 14 words) |
| Data SRAM | 224 bytes |
| Data EEPROM | 128 bytes |
| Digital I/O Pins | 16 |
| Operating Voltage Range | 2.0 V to 5.5 V (LF series) |
| Analog Comparators | 2 with programmable VREF |
| Timers | 2 x 8-bit + 1 x 16-bit Timer/Counter |
| Communication | USART/SCI with dedicated baud-rate generator |
| Internal Oscillator | 4 MHz (factory calibrated, software selectable) |
| Operating Temperature Range | -40C to +85C (Industrial, 'I' suffix) |
| Package | 18-pin SOIC (SO) |
| Package Dimensions | 7.50 mm body width, 1.27 mm pitch |
| Mounting Type | Surface Mount |
| MSL Level | 1 (unlimited floor life) |
| Lead-Free / RoHS | Lead-free, RoHS compliant per Microchip product page |
| Programming Interface | ICSP (In-Circuit Serial Programming) via RB6/RB7 |
| Special Features | POR, PWRT, OST, BOD, WDT with dedicated RC, weak pull-ups on PORTB, multiplexed MCLR |
PIC16LF627T-04I/SO Pin Configuration
| Pin 1 | RA2/AN2/VREF — Digital I/O / Analog input 2 / External VREF for comparator |
| Pin 2 | RA3/AN3/C1OUT — Digital I/O / Analog input 3 / Comparator 1 output |
| Pin 3 | RA4/T0CKI/C2OUT — Digital I/O (open-drain) / Timer0 clock input / Comparator 2 output |
| Pin 4 | RA5/MCLR/VPP — Digital I/O / Master Clear (Reset) input / Programming voltage input |
| Pin 5 | VSS — Ground reference |
| Pin 6 | RB0/INT — Digital I/O PORTB0 / External interrupt input |
| Pin 7 | RB1/RX/DT — Digital I/O / USART RX (asynchronous) / data line (synchronous) |
| Pin 8 | RB2/TX/CK — Digital I/O / USART TX (asynchronous) / clock line (synchronous) |
| Pin 9 | RB3/CCP1 — Digital I/O / Capture/Compare/PWM module 1 |
| Pin 10 | RB4/PGM — Digital I/O / Low-voltage ICSP programming input |
| Pin 11 | RB5 — Digital I/O PORTB5 |
| Pin 12 | RB6/PGC — Digital I/O / ICSP clock (programming/debugging) |
| Pin 13 | RB7/PGD — Digital I/O / ICSP data (programming/debugging) |
| Pin 14 | VDD — Positive supply voltage (2.0 V to 5.5 V) |
| Pin 15 | OSC2/CLKOUT/RA6 — Crystal/oscillator output / Fosc/4 clock output / Digital I/O |
| Pin 16 | OSC1/CLKIN/RA7 — Crystal/oscillator input / External clock input / Digital I/O |
| Pin 17 | RA0/AN0 — Digital I/O / Analog input 0 |
| Pin 18 | RA1/AN1 — Digital I/O / Analog input 1 |
Typical Applications
PIC16LF627T-04I/SO is suitable for 6 applications: Battery-Powered Sensor Node, IR Remote Control Transmitter, Low-Cost LED Lighting Controller, Industrial Monitoring and Alarm Modules, Simple Appliance Control (Coffee Maker, Fan, Humidifier), Automotive Body Electronics (Non-Safety).
Battery-Powered Sensor Node
The PIC16LF627T-04I/SO is well-suited to battery-powered wireless sensor nodes thanks to its 2.0 V minimum operating voltage and low quiescent current LF variant characteristics. With 1.75 KB of flash and 224 bytes of SRAM, the device can run a basic duty-cycled sensor reading loop, store calibration constants in the 128-byte EEPROM, and drive a low-power radio via GPIO. The 4 MHz internal oscillator eliminates an external crystal, reducing BOM and quiescent current. For typical 1% duty-cycle operation at 3 V with a 2400 bps sub-GHz radio, two AA cells can power the node for over a year. The 16 I/O pins support multiple sensor interfaces and an LED indicator without external multiplexers.
Recommended
IR Remote Control Transmitter
The PIC16LF627T-04I/SO is a strong fit for infrared remote control transmitters used in consumer A/V equipment. The internal 4 MHz oscillator provides sufficient timing accuracy for 38 kHz / 40 kHz / 56 kHz carrier generation through PWM, while the 16-bit Timer1 captures button-debounce intervals reliably. The flash memory stores complex button maps and protocol stacks (RC5, NEC, SIRC), and the 128-byte EEPROM retains pairing codes across battery swaps. The LF variant operates down to 2.0 V, extending battery life as AAA cells discharge. The 18-SOIC package is small enough for slim remote housings, and the 16 I/O pins drive 32-key matrix keypads via 4x8 scan with no external decoder.
Recommended
Low-Cost LED Lighting Controller
The PIC16LF627T-04I/SO serves as an LED lighting controller with PWM dimming, fade-in/fade-out effects, and basic DMX-512-style or analog 0-10 V dim input handling. The two on-chip analog comparators with programmable VREF provide cost-free threshold detection for ambient light sensors and analog dim inputs, eliminating external op-amps. The USART enables daisy-chained or addressable LED string control with simple TTL-level protocols. The 16 I/O pins drive multiple LED channels via low-side MOSFETs (e.g. 2N7002) or directly sink/source the 25 mA per-pin current to drive indicator LEDs. At $1.68 unit price in 1k quantity, this MCU enables sub-$5 BOM LED controller modules.
Recommended
Industrial Monitoring and Alarm Modules
The PIC16LF627T-04I/SO is suitable for industrial monitoring modules such as flow totalizers, level alarms, and temperature trip indicators where reliability and BOM cost dominate design priorities. The two analog comparators continuously monitor sensor inputs against the programmable on-chip voltage reference, generating interrupt-driven alarm outputs. The Watchdog Timer with its own internal RC oscillator ensures the MCU recovers from software lockups in electrically noisy industrial environments. Brown-out Detect and Power-on Reset guarantee defined startup behavior across power events. The wide -40C to +85C industrial temperature range handles factory floor conditions. The internal 4 MHz oscillator with software calibration eliminates field-trim requirements.
Recommended
Simple Appliance Control (Coffee Maker, Fan, Humidifier)
The PIC16LF627T-04I/SO provides the right level of integration for simple household appliances where the MCU replaces a handful of discrete timer ICs and relays. The 16 I/O pins drive multiple relays via triacs, read capacitive touch or button inputs, and control 7-segment displays directly via multiplexed GPIO. The 128-byte EEPROM stores user preferences (intensity level, last setting) across power cycles, and the internal USART enables optional BLE/Wi-Fi module hookup for smart-appliance variants. The industrial temperature range and proven PIC16F6xx longevity make it ideal for products with 10+ year production lifecycles. Flash-based firmware simplifies late-stage feature updates without hardware rework.
Recommended
Automotive Body Electronics (Non-Safety)
The PIC16LF627T-04I/SO can be used in non-safety automotive body electronics such as seat controllers, mirror adjusters, ambient lighting, and accessory timers, but it is NOT qualified to AEC-Q100. For safety-relevant or AEC-Q100-mandated automotive applications, designers should select an AEC-Q100-qualified MCU from the PIC16F1xxx family (e.g., PIC16F1938-E/SO) or a dedicated automotive MCU. Within non-safety body applications, the PIC16LF627 provides sufficient GPIO, PWM, and analog comparator resources at low cost, and operates reliably across -40C to +85C with proper input protection circuitry.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF627T-04I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF627-04I/SO | PIC16LF627AT-I/SO | PIC16F627-04I/SO | PIC16F628-04I/SO |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 18-SOIC | 18-SOIC - same | 18-SOIC - same | 18-SOIC - same | 18-SOIC - same |
| Maximum CPU Frequency | 4 MHz (1 MIPS) | 4 MHz | 4 MHz (up to 20 MHz in '20' grade) | 4 MHz | 4 MHz |
| Program Memory (Flash) | 1.75 KB (1K x 14) | 1.75 KB | 1.75 KB | 1.75 KB | 3.5 KB (2K x 14) |
| Data SRAM | 224 bytes | 224 bytes | 224 bytes | 224 bytes | 224 bytes |
| Data EEPROM | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes |
| I/O Pins | 16 | 16 | 16 | 16 | 16 |
| Operating Voltage Range | 2.0 V to 5.5 V (LF) | 2.0 V to 5.5 V (LF) | 2.0 V to 5.5 V (LF) | 2.0 V to 5.5 V | 2.0 V to 5.5 V |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| Flash Endurance (Min Cycles) | 10,000 (typical LF627) | 10,000 | 100,000 (LF627A enhanced) | 10,000 | 10,000 |
Key Differentiators
- Tape-and-reel packaging for SMT production (vs PIC16LF627-04I/SO)
- Industry-proven long-term availability (vs PIC16LF627AT-I/SO)
- Ultra-low quiescent current LF variant (vs PIC16F627-04I/SO)
Design Notes
The PIC16LF627T-04I/SO is a CMOS MCU with very low active current (~2 mA at 4 MHz / 5 V) and ultra-low sleep current (typically <1 uA in Sleep mode with WDT disabled). For battery-powered designs, use the Sleep mode aggressively - wake on Watchdog Timer overflow (default ~18 ms WDT period) or external interrupt on RB0/INT. Disable the A/D and comparator modules when not in use via the CMCON and VRCON registers to minimize quiescent current.
The internal 4 MHz INTOSC is factory-calibrated to within +/-1% at 5 V and 25C, but can drift +/-2% over the full -40C to +85C industrial range. For UART communication, compensate for oscillator error at the receiver (use lower baud rates) or use an external crystal for timing-critical serial links. The OSCTUNE register provides +/-12% software trim in 0.25% steps for fine-tuning against a reference. According to Microchip application note AN244, INTOSC drift with Vdd is approximately -0.1%/V from 2.0 V to 5.5 V.
Place a 100 nF decoupling capacitor as close as possible to the VDD pin (pin 14) on the PIC16LF627T-04I/SO, with trace length less than 5 mm. Add a bulk 10 uF tantalum or ceramic capacitor at the board's main power input. For ICSP programming, ensure the RB6/PGC and RB7/PGD pins are not loaded by external circuitry beyond ~50 pF and that MCLR (pin 4) is accessible with a pull-up resistor (typically 10 kOhm to VDD) - these are the three programming pins required for in-circuit serial programming.
Three common pitfalls when designing with the PIC16LF627T-04I/SO: (1) Configuring pin RA4 as a digital output ignores its open-drain nature - external pull-up is required for high-level output. (2) The MCLR pin (RA5/MCLR) defaults to MCLR function after reset; to use it as a digital I/O, the MCLRE configuration bit must be cleared in the configuration word. (3) PORTB weak pull-ups are enabled by the RBPU bit (active LOW = disabled); clearing RBPU enables pull-ups globally on PORTB. Neglecting these three configuration details is the source of most 'dead on arrival' PIC16F627 designs.
When using the USART for RS-232 or RS-485 communication, ensure the baud-rate error stays below +/-2% total. With the internal 4 MHz oscillator, the achievable standard baud rates are limited to 1200, 2400, 4800, 9600 (SPBRG=25), 19200 (SPBRG=12, ~0.16% error) at low BRGH=0 settings. For higher rates (57600, 115200), set BRGH=1 and use SPBRG=21 (57600, ~0.79% error) or migrate to a 20 MHz speed grade part. Adding an external RS-485 transceiver like the MAX485 or ISL3179 is recommended for industrial noise immunity.
Compliance Information
RoHS and lead-free compliant per Microchip product page. Not AEC-Q100 qualified - migrate to PIC16F1938-E/SO or similar for automotive applications. REACH compliance confirmed via Microchip regulatory documentation. Conflict minerals status available in Microchip's annual CMRT report.