PIC16LF627-04I/P - 8-bit 4MHz Flash MCU, 1.75KB | Microchip
MPN: PIC16LF627-04I/P ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.94 | $1.94 |
| 10 | $1.74 | $17.40 |
| 100 | $1.55 | $155.00 |
| 500 | $1.38 | $690.00 |
| 1,000 | $1.23 | $1,230.00 |
PIC16LF627-04I/P Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (FLASH/ROM), working memory (RAM), and configurable peripherals into one package. The PIC16F architecture uses a Harvard design with separate program and data buses, a 14-bit wide instruction word, and a RISC-style instruction set that executes most instructions in one oscillator cycle. Within the broader semiconductor taxonomy, MCUs sit between simple logic ICs and full microprocessors, optimized for embedded control rather than general-purpose computing.
Key features of the PIC16LF627 include a hardware USART for asynchronous serial communication, a Capture/Compare/PWM (CCP) module, an 8-channel 10-bit ADC, two analog comparators, and nanoWatt power management with sleep currents below 1 uA. Brown-out Detect (BOD), Power-on Reset (POR), Power-up Timer (PWRT), and Watchdog Timer (WDT) with dedicated RC oscillator are integrated for reliable field-up behavior without external supervision parts. The USART and comparators allow direct interfacing to RS-232/RS-485 transceivers and analog sensors.
The PIC16LF627-04I/P uses a 14-bit RISC core that completes most instructions in a single oscillator cycle, giving throughput close to 4 MIPS at the maximum 4 MHz clock. Internal RC oscillator options (factory calibrated, typically 4 MHz, 1 MHz, 32 kHz) eliminate the external crystal in many designs, reducing BOM cost and PCB area. In-circuit serial programming (ICSP) via two pins allows firmware updates after PCB assembly, supporting late-stage customization and field firmware revision without removing the chip.
Typical applications for this MCU include battery-powered sensor nodes, low-cost remote controls, HVAC thermostat interfaces, small appliance controllers, and industrial sensor signal conditioning where the 10-bit ADC and analog comparators interface directly to transducer outputs. The wide operating voltage range also makes it suitable for 3.3V systems drawing from single-cell Li-ion or two-AA battery packs.
When designing with the PIC16LF627-04I/P, leave pin 10 (RA5/MCLR/VPP) properly decoupled if reset is not used, and verify that VDD rises monotonically within the POR/PWRT window to guarantee clean startup. The internal oscillator is sufficient for most UART bit rates below 9600 baud at 4 MHz, but higher baud rates benefit from a crystal to keep cumulative timing error within the UART framing tolerance.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not consolidated on the manufacturer datasheet - structured for engineers evaluating PIC16F62X family migration paths and EMC/LF process-node selection trade-offs.
Drop-in alternatives for PIC16LF627-04I/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 PIC16LF627-04I/P (same form factor and footprint) — differing in Core Architecture, Mounting Type, Package, Timers, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF627-04/P
✅ Drop-In✓ In Stock
$1.05 / Unit
View Datasheet →PIC16LF627A-I/P
✅ Drop-In✓ In Stock
$2 / Unit
View Datasheet →PIC16LF628A-I/P
✅ Drop-In✓ In Stock
$1.84 / Unit
View Datasheet →PIC16F627A-I/P
✅ Drop-In✓ In Stock
$1.72 / Unit
View Datasheet →PIC16F627-04/P
✅ Drop-In✓ In Stock
$2.05 / Unit
View Datasheet →PIC16LF627-04I/P Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC16F RISC, 14-bit instruction word, Harvard |
| Program Memory (FLASH) | 1.75 KB (1K x 14) |
| Data RAM | 224 bytes |
| Data EEPROM | 128 bytes |
| Maximum Clock Frequency | 4 MHz (04 speed variant) |
| Supply Voltage (VDD) | 2.0 V to 3.6 V (LF process) |
| I/O Pins | 16 |
| ADC | 10-bit, multiplexed with I/O |
| Analog Comparators | 2 |
| USART | 1 hardware USART (AUSART) |
| CCP Module | 1 (Capture/Compare/PWM) |
| Timers | Timer0 (8-bit), Timer1 (16-bit), Timer2 (8-bit with PWM) |
| Internal Oscillator | Yes (4 MHz / 1 MHz / 32 kHz) |
| Watchdog Timer | Yes with dedicated RC oscillator |
| Brown-out Detect (BOD) | Yes |
| ICSP (In-Circuit Serial Programming) | Yes |
| Operating Temperature | -40 C to +85 C (I-grade) |
| Package | 18-pin PDIP (P) |
| Mounting Type | Through Hole |
| RoHS Status | Compliant |
PIC16LF627-04I/P Pin Configuration
| Pin 1 | RA2 — Bidirectional I/O pin; AN2 analog input |
| Pin 2 | RA3 — Bidirectional I/O pin; AN3 analog input; VREF+ |
| Pin 3 | RA4 — Bidirectional I/O pin; T0CKI clock input |
| Pin 4 | RA5 — Bidirectional I/O pin; SS/AN4 |
| Pin 5 | GND — Ground reference |
| Pin 6 | RB0 — Bidirectional I/O; INT external interrupt |
| Pin 7 | RB1 — Bidirectional I/O; RX/DT USART receive |
| Pin 8 | RB2 — Bidirectional I/O; TX/CK USART transmit |
| Pin 9 | RB3 — Bidirectional I/O; CCP1 PWM output |
| Pin 10 | RB4 — Bidirectional I/O; PGM programming |
| Pin 11 | RB5 — Bidirectional I/O; PGM programming |
| Pin 12 | RB6 — Bidirectional I/O; ICSPCLK programming clock |
| Pin 13 | RB7 — Bidirectional I/O; ICSPDAT programming data |
| Pin 14 | VDD — Positive supply (2.0V to 3.6V) |
| Pin 15 | OSC2 — Oscillator output / RA6 I/O |
| Pin 16 | OSC1 — Oscillator input / RA7 I/O |
| Pin 17 | RA0 — Bidirectional I/O; AN0 analog input |
| Pin 18 | RA1 — Bidirectional I/O; AN1 analog input; VREF- |
Typical Applications
PIC16LF627-04I/P is suitable for 6 applications: Battery-Powered Sensor Node, HVAC Thermostat Interface, Small Appliance Controller, Industrial Sensor Signal Conditioning, Low-Cost Remote Control Transmitter, Automotive Aftermarket Accessory.
Battery-Powered Sensor Node
The PIC16LF627-04I/P is well matched to battery-powered sensor nodes where its 2.0-3.6V LF process and nanoWatt sleep current (below 1 uA) extend coin-cell life into multi-year timeframes. The integrated 10-bit ADC and two analog comparators let the chip interface directly to thermistor, photocell, or thermopile transducers without external signal conditioning. A 32 kHz internal oscillator mode keeps average current below 5 uA in periodic wake-up duty cycles. The 18-pin PDIP package simplifies through-hole prototyping for evaluation hardware before committing to SMD layouts. Pair the part with a 32 kHz watch crystal if sub-second sleep timing accuracy is required for synchronization.
Recommended
HVAC Thermostat Interface
The PIC16LF627-04I/P drives HVAC thermostat user interfaces where its 16 digital I/O pins directly scan 4x4 keypad matrices and 7-segment LED displays without external mux logic. The hardware USART handles Modbus or BACnet-style communication to building automation backbones, while the 10-bit ADC reads thermistor inputs at 0.5 C resolution across the -10C to +50C control range. The 4 MHz instruction rate comfortably runs debounce, PID, and LCD refresh loops in one mainline. The 18-pin PDIP remains popular for service-replaceable thermostat controllers where field swap, not miniaturization, is the priority. Combined with a 3.3V LDO and opto-isolated relay drivers, it forms a complete wall-mount controller.
Recommended
Small Appliance Controller
The PIC16LF627-04I/P fits small appliance controllers such as coffee makers, blenders, and slow cookers where the 18-pin PDIP is hand-solderable and field-replaceable. The CCP module drives PWM-controlled heating elements or motor speed regulation up to 10 kHz, while the analog comparators directly sense over-current or over-temperature conditions without external op-amps. The 1.75 KB FLASH accommodates state-machine firmware for thermal PID loops and user-mode selection. With industrial-grade -40C to +85C temperature range and 3.3V operation, the LF variant suits appliances with lithium backup or USB-powered control boards. Add an external TRIAC driver for mains-switched heater loads.
Recommended
Industrial Sensor Signal Conditioning
The PIC16LF627-04I/P conditions industrial sensor signals in 4-20 mA loop-powered or 0-10V analog input modules where its 10-bit ADC and 2 analog comparators provide front-end measurement without dedicated op-amps. The hardware USART communicates to downstream PLCs or remote IO modules, while the 18-pin PDIP allows easy replacement on legacy 24V analog cards where the 5V F-process variant is not desired. The integrated BOD and WDT with dedicated RC oscillator ensure deterministic restart on industrial power-rail glitches. The LF process permits direct 3.3V operation from low-drop linear regulators off 24V industrial bus. Combined with 4-20 mA loop transmitter ICs, it forms a complete analog-input module.
Recommended
Low-Cost Remote Control Transmitter
The PIC16LF627-04I/P serves as the controller in low-cost IR/RF remote control transmitters where its sleep-mode current below 1 uA preserves battery life and its 4 MHz internal oscillator eliminates external resonator cost. The hardware USART or software bit-banging drives 38 kHz IR carrier modulation with stable timing derived from Timer1. The 16 I/O pins comfortably scan 16-button keypads plus status LEDs without mux chips. With 2.0-3.6V LF process, the part operates directly from 2xAAA alkaline cells without a boost converter. The A-revision PIC16LF627A-I/P is a direct drop-in upgrade if more compute headroom is later needed for protocol features.
Recommended
Automotive Aftermarket Accessory
The PIC16LF627-04I/P runs automotive aftermarket accessories such as alarm modules, lighting controllers, and CAN-to-LIN gateways where its industrial -40C to +85C temperature grade and 3.3V LF process match 12V-battery-tolerant accessory rails. The hardware USART handles LIN bus communication, while the CCP module drives PWM-controlled LED lighting or buzzer tones. The internal oscillator tolerates automotive temperature swings without crystal drift. For non-safety-critical accessories (lighting, comfort, audio) this part is widely used and accepted by hobbyists and small-volume automotive vendors. Pair with a CAN or LIN transceiver IC for vehicle-network connectivity.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF627-04I/P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF627-04/P | PIC16LF627A-I/P | PIC16LF628A-I/P | PIC16F627A-I/P | PIC16F627-04/P |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | PDIP-18 | PDIP-18 - same | PDIP-18 - same | PDIP-18 - same | PDIP-18 - same | PDIP-18 - same |
| Program FLASH | 1.75 KB | 1.75 KB | 1.75 KB | 3.5 KB (+100%) | 1.75 KB | 1.75 KB |
| Max Oscillator Frequency | 4 MHz | 4 MHz | 20 MHz (+400%) | 20 MHz | 20 MHz | 4 MHz |
| Supply Voltage (VDD) | 2.0 V to 3.6 V (LF) | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 2.0 V to 3.6 V | 4.0 V to 5.5 V (F process) | 4.0 V to 5.5 V (F process) |
| Data RAM | 224 B | 224 B | 224 B | 224 B | 224 B | 224 B |
| Data EEPROM | 128 B | 128 B | 128 B | 128 B | 128 B | 128 B |
| I/O Pins | 16 | 16 | 16 | 16 | 16 | 16 |
| Temperature Grade | -40 C to +85 C (I) | 0 C to +70 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | 0 C to +70 C |
Key Differentiators
- Low-voltage LF process for direct 3.3V battery operation (vs PIC16F627-04/P)
- Industrial -40C to +85C temperature range (vs PIC16LF627-04/P)
- 1.75 KB FLASH balances code size and unit cost (vs PIC16LF628A-I/P)
Design Notes
The PIC16LF627-04I/P nanoWatt sleep mode drops quiescent current below 1 uA when peripherals are disabled. According to Microchip datasheet (DS40044B), place a 0.1 uF ceramic decoupling capacitor within 5 mm of the VDD pin (pin 14) to keep digital switching transients out of the analog supply rail. Add a 10 uF bulk capacitor if the source impedance is high (battery or long cable). For battery life calculation, estimate the duty cycle as t_active/t_period and average current as (t_active*I_active + t_sleep*I_sleep)/t_period.
Pin 10 on this 18-pin DIP is the RA5/MCLR/VPP multiplexed pin - leaving it floating without the internal weak pull-up can cause spurious resets in noisy environments. Configure MCLRE=0 in the configuration word if MCLR reset is not needed and use the pin as RA5. The internal oscillator is factory calibrated but coarse; for UART bit rates above 9600 baud at 4 MHz, use an external crystal to keep total timing error below the 2% UART framing tolerance. Brown-out Detect (BOD) must be enabled in the configuration word for predictable 3.3V startup.
The PIC16LF627-04I/P typically dissipates below 100 mW even at full 4 MHz with all peripherals active, so no heatsink is required for normal through-hole operation. Estimated: at VDD=3.3V, all peripherals on, and clock=4 MHz, total current is around 2 mA giving 6.6 mW - well within the 18-pin PDIP thermal envelope. For high-temperature environments near 85C, derate clock frequency by 10% per 10C above 70C to maintain oscillator accuracy and reduce timing-related faults.
Compliance Information
RoHS compliant per Microchip product page; lead-free PDIP package; halogen-free. Not AEC-Q100 qualified - choose AEC-Q100-grade PIC parts for automotive safety applications.
