PIC16LF627-04/P - 4MHz 8-Bit Flash MCU, 1.75KB | Microchip
MPN: PIC16LF627-04/P ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.65 | $1.65 |
| 10 | $1.52 | $15.20 |
| 100 | $1.38 | $138.00 |
| 500 | $1.21 | $605.00 |
| 1,000 | $1.05 | $1,050.00 |
PIC16LF627-04/P Overview
A flash-based 8-bit CMOS microcontroller (MCU) combines a CPU core, on-chip non-volatile program memory, RAM, and configurable peripherals in a single integrated circuit. The PIC16F62X family uses a Harvard architecture where program and data memories are accessed through separate buses, allowing instruction fetch and operand read to occur in a single cycle. This class of MCU sits within the broader product hierarchy: 8-bit microcontroller -> microcontroller -> embedded controller -> semiconductor IC. It is widely deployed in cost-sensitive, low-power consumer, appliance, and industrial control applications where deterministic real-time behavior matters more than raw compute throughput.
Key differentiating features include 4MHz maximum operating frequency, 200ns instruction cycle, 16 I/O with individual direction control, an enhanced USART supporting RS-232/RS-485, a 16-bit timer/counter with capture/compare/PWM, an internal voltage reference, two analog comparators, and in-circuit serial programming (ICSP). The 224-byte SRAM and 128-byte EEPROM on-chip data EEPROM support parameter storage without external memory. Brown-out reset (BOR), watchdog timer (WDT), and power-on reset (POR) round out the safety features typical of Microchip mid-range 8-bit devices.
Architecturally, the PIC16F62X uses a 14-bit instruction set with a fixed 2-stage pipeline, delivering 5 MIPS at 20MHz. The 'LF' voltage variant extends low-voltage operation down to 2.0V, making the part usable directly from a 2xAA battery stack or 3.3V regulated rail. The '-04' speed designation caps the internal oscillator at 4MHz, trading clock speed for lower EMI and reduced power consumption in cost-sensitive designs.
Typical applications include consumer remote controls, small appliance controllers, simple sensor signal conditioners, low-end motor drivers, smart battery chargers, and hobbyist/educational embedded projects. The 18-pin PDIP package is favored for breadboard prototyping and through-hole manufacturing. Designers choose this part when flash re-programmability, integrated EEPROM, and a familiar PIC16 toolchain matter more than higher pin count or modern peripherals like USB or CAN.
Drop-in alternatives for PIC16LF627-04/P — 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/P (same form factor and footprint) — differing in Core Architecture, Package, Mounting Type, Operating Temperature, Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF628-04/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF627A-I/P
✅ Drop-In✓ In Stock
$2 / Unit
View Datasheet →PIC16F627-04/P
✅ Drop-In✓ In Stock
$2.05 / Unit
View Datasheet →PIC16F628-04/P
✅ Drop-In✓ In Stock
$2.35 / Unit
View Datasheet →PIC16F627A-I/P
✅ Drop-In✓ In Stock
$1.72 / Unit
View Datasheet →PIC16LF627-04/P Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC16 8-bit RISC, Harvard |
| Maximum CPU Frequency | 4 MHz |
| Program Memory (Flash) | 1.75 KB (1K x 14) |
| Data SRAM | 224 bytes |
| Data EEPROM | 128 bytes |
| Instruction Set Width | 14-bit |
| Instruction Cycle Time | 200 ns @ 4 MHz |
| Supply Voltage (Vdd) | 2.0 V to 5.5 V |
| I/O Pins | 16 |
| Operating Temperature Range | 0C to +70C |
| Package | 18-pin PDIP (P) |
| Mounting Type | Through-Hole (DIP) |
| Peripherals | USART, 16-bit Timer/CCP, 2x Analog Comparator |
| Programming Method | ICSP (In-Circuit Serial Programming) |
| RoHS Status | Compliant |
PIC16LF627-04/P Pin Configuration
| Pin 1 | RA2/AN2/CVREF/VREF- — Digital I/O / analog comparator input / voltage reference |
| Pin 2 | RA3/AN3/C1OUT — Digital I/O / analog input / comparator 1 output |
| Pin 3 | RA4/AN4/T0CKI — Digital I/O / analog input / Timer0 clock input |
| Pin 4 | RA5/MCLR/VPP — Digital I/O / Master Clear (reset) / programming voltage |
| Pin 5 | VSS — Ground reference |
| Pin 6 | RB0/INT — Digital I/O / external interrupt |
| Pin 7 | RB1/RX/DT — Digital I/O / USART RX / I/O data |
| Pin 8 | RB2/TX/CK — Digital I/O / USART TX / clock line |
| Pin 9 | RB3/CCP1 — Digital I/O / Capture-Compare-PWM |
| Pin 10 | RB4/PGM — Digital I/O / LVP programming entry |
| Pin 11 | RB5 — Digital I/O |
| Pin 12 | RB6/T1OSO/T1CKI/PGC — Digital I/O / Timer1 oscillator / ICSP clock |
| Pin 13 | RB7/T1OSI/PGD — Digital I/O / Timer1 oscillator / ICSP data |
| Pin 14 | VDD — Positive supply voltage (2.0V to 5.5V) |
| Pin 15 | OSC2/CLKOUT/RA6 — Crystal output / Fosc clockout / digital I/O |
| Pin 16 | OSC1/CLKIN/RA7 — Crystal input / external clock / digital I/O |
| Pin 17 | RA0/AN0 — Digital I/O / analog comparator input |
| Pin 18 | RA1/AN1 — Digital I/O / analog comparator input |
Typical Applications
PIC16LF627-04/P is suitable for 6 applications: Consumer Remote Control, Small Appliance Controller, Battery Charger Control, Sensor Signal Conditioner, Hobbyist and Educational Embedded Projects, Simple Motor Driver Controller.
Consumer Remote Control
The PIC16LF627-04/P fits consumer remote-control designs because its 4MHz core, 16 I/O, and 1.75KB flash are sufficient for IR protocol encoding/decoding (RC5, NEC, Sony) and keypad scanning. Operating at 2.0V-5.5V, it runs directly from 2xAA cells without a boost regulator. The internal 16-bit CCP timer drives IR carrier generation (typically 38kHz), and the 224-byte SRAM supports frame buffering. Low power consumption extends battery life to multi-year levels in standby.
Recommended
Small Appliance Controller
In small kitchen or laundry appliances, the PIC16LF627-04/P delivers deterministic real-time control for motor PWM, temperature sensing, and button/HMI management. Its 16-bit CCP module generates triac-firing pulses or low-side MOSFET drive; the two analog comparators implement over-temperature and zero-cross detection. The 128-byte EEPROM stores calibration constants and user settings through power cycles. The 18-pin PDIP is breadboard-friendly for prototyping with through-hole manufacturing at low volume.
Recommended
Battery Charger Control
The PIC16LF627-04/P is well-suited for NiMH, Li-ion, or lead-acid charger controllers operating from 2.0V to 5.5V, since its ADC-free analog comparators monitor charge current and termination voltage while the 16-bit timer tracks elapsed time. The internal USART reports state to a host display, and the EEPROM logs charge cycle counts. The wide Vdd range accommodates a single-cell Li-ion pack directly, simplifying BOM. Low Iq in sleep mode reduces standby drain to microampere levels.
Recommended
Sensor Signal Conditioner
The PIC16LF627-04/P serves as a low-cost sensor front-end that linearizes and calibrates transducer outputs such as thermocouples, RTDs, or load cells. Its analog comparator and 16-bit timer measure pulse widths from sigma-delta or PWM-output sensors, while the EEPROM stores calibration tables. The USART streams conditioned readings to a host controller. Low power and wide Vdd range make it a fit for remote or battery-powered sensor nodes in industrial monitoring.
Recommended
Hobbyist and Educational Embedded Projects
The PIC16LF627-04/P is a classic choice for student and hobbyist projects on breadboards thanks to its 0.1-inch DIP pin spacing, 5V-tolerant I/O, and free MPLAB X IDE toolchain. It teaches core embedded concepts: GPIO, timers, interrupts, USART, and EEPROM without overwhelming complexity. The 1.75KB flash is large enough for blinking-LED demos up to UART-controlled robots. PICkit programmers provide in-circuit debugging over the ICSP pins, accelerating learning.
Recommended
Simple Motor Driver Controller
The PIC16LF627-04/P drives low-power brushed DC motors, small steppers, or solenoids via MOSFET gate drivers, using the 16-bit CCP module to generate PWM and the analog comparator to sense back-EMF for stall detection. Its 4MHz core is fast enough for software PID loops in applications like valve actuation or fan control. The USART serves as a command interface to a master controller. The 2.0V-5.5V range supports both 3.3V logic and 5V motor bus rails.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF627-04/P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF628-04/P | PIC16LF627A-I/P | PIC16F627-04/P | PIC16F628-04/P | PIC16F627A-I/P |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 18-pin PDIP (P) | 18-pin PDIP (P) - same | 18-pin PDIP (P) - same | 18-pin PDIP (P) - same | 18-pin PDIP (P) - same | 18-pin PDIP (P) - same |
| Maximum CPU Frequency | 4 MHz | 4 MHz | 20 MHz | 4 MHz | 4 MHz | 20 MHz |
| Program Memory (Flash) | 1.75 KB | 3.5 KB | 1.75 KB | 1.75 KB | 3.5 KB | 1.75 KB |
| Data SRAM | 224 bytes | 224 bytes | 224 bytes | 224 bytes | 224 bytes | 224 bytes |
| Data EEPROM | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes |
| Supply Voltage (Vdd) | 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 | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
| I/O Pins | 16 | 16 | 16 | 16 | 16 | 16 |
| Peripherals | USART, 16-bit Timer/CCP, 2x Comparator | USART, 16-bit Timer/CCP, 2x Comparator | USART, 16-bit Timer/CCP, 2x Comparator | USART, 16-bit Timer/CCP, 2x Comparator | USART, 16-bit Timer/CCP, 2x Comparator | USART, 16-bit Timer/CCP, 2x Comparator |
Key Differentiators
- Wide 2.0V-5.5V Vdd operation for battery-powered designs (vs PIC16F627-04/P)
- Higher flash memory density in same package (vs PIC16LF628-04/P)
- Original-spec 4MHz device vs newer A-revision (vs PIC16LF627A-I/P)
Design Notes
The PIC16LF627-04/P supports a wide 2.0V-5.5V Vdd range, but decoupling must include a 100nF ceramic capacitor placed within 5mm of the Vdd pin (pin 14). For battery-powered designs, add a 10uF bulk capacitor at the supply rail to suppress motor or relay inrush transients. The internal brown-out reset (BOR) and power-on reset (POR) circuitry require a clean Vdd ramp; avoid slow-rising supplies that could trip BOR intermittently.
Pin 4 is MCLR/VPP - never leave it floating. Tie it to Vdd through a 10k resistor for normal operation, or directly to Vdd if reset is not needed. For ICSP programming, route PGD (RB7) and PGC (RB6) traces to a 6-pin header that does not cross other signal traces. The OSC1/OSC2 crystal traces should be short and surrounded by a ground guard ring to minimize EMI pickup on the low-amplitude oscillator waveform.
Configuration word bits (CP, WDTE, BOREN, PWRTE) must be set correctly at programming time or the MCU may fail to start. The configuration word is at flash address 0x2007 and is not erased by a normal chip erase. When migrating from PIC16F627 to PIC16LF627, ensure Vdd actually exceeds 2.0V at startup; designs that worked on the F variant at 4.5V may stall on the LF variant if supplied from a marginal rail.
Compliance Information
RoHS-compliant per Microchip product page. Industrial temperature range 0C to +70C only; automotive designs should use AEC-Q100-qualified PIC16 variants.
