PIC16LF627T-04I/SS - 4MHz PIC16 8-bit MCU, 1.75KB Flash | Microchip
MPN: PIC16LF627T-04I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.12 | $3.12 |
| 10 | $2.85 | $28.50 |
| 100 | $2.42 | $242.00 |
| 500 | $2.05 | $1,025.00 |
| 1,000 | $1.78 | $1,780.00 |
PIC16LF627T-04I/SS Overview
What is an 8-bit Flash microcontroller? An 8-bit Flash microcontroller is a small, self-contained computer-on-a-chip that integrates a CPU, non-volatile Flash program memory, volatile SRAM, and peripherals such as timers, comparators, and I/O. Within the broader taxonomy, it sits under microcontroller -> embedded controller -> semiconductor IC. Flash-based MCUs dominate low-power and cost-sensitive designs because they support in-circuit re-programming without an external ROM, and the 8-bit class remains popular where deterministic interrupt response and code density matter more than raw throughput.
Key features of the PIC16LF627T-04I/SS include a Harvard RISC architecture with only 35 single-cycle instructions, 16 bidirectional digital I/O pins with high-current sink/source for direct LED drive, two analog comparators with programmable on-chip voltage reference, a 16-bit timer/counter (TMR1) plus an 8-bit timer (TMR0), a Watchdog Timer with its own on-chip RC oscillator, Power-on Reset, Brown-out Detect, and programmable weak pull-ups on PORTB. The integrated USART supports RS-232/RS-485 communication without an external transceiver for short-run links.
Architecturally, the device uses a 14-bit instruction word with an 8-bit data path and a separate program/data bus, eliminating the Von Neumann bottleneck. The Flash program memory supports up to 100K erase/write cycles and retains data for more than 40 years, enabling field-upgradable firmware. The CMOS process combined with nanoWatt-style power management delivers typical active current below 2 mA at 4 MHz, supporting portable and remote applications.
Typical applications include industrial control logic, sensor signal conditioning, appliance front-panel controllers, automotive interior accessories (non-safety), battery-powered instrument front-ends, and remote sensor nodes. The integrated comparators make it a strong fit for threshold detectors and analog-front-end triggers.
Designers should note that the SSOP-20 footprint requires careful thermal relief on the PCB and that decoupling capacitors (0.1 uF plus 10 uF bulk) must be placed within 5 mm of VDD/VSS to ensure stable Brown-out Detect behavior across load transients.
This page combines distributor inventory and pricing, drop-in cross-reference alternatives, and engineering design notes beyond the manufacturer datasheet summary.
Drop-in alternatives for PIC16LF627T-04I/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 PIC16LF627T-04I/SS (same form factor and footprint) — differing in Package, Timers, Core Architecture, Mounting Type, Communication.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LF627AT-I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16LF627-04I/SS
✅ Drop-In✓ In Stock
$1.95 / Unit
View Datasheet →PIC16LF627A-I/P
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2 / Unit
View Datasheet →PIC16LF627T-04/SO
✅ Drop-In✓ In Stock
$0.84 / Unit
View Datasheet →PIC16LF627-04I/SO
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.55 / Unit
View Datasheet →PIC16LF627-04I/P
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.23 / Unit
View Datasheet →PIC16LF627T-04I/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC16 RISC (Harvard) |
| Program Memory | 1.75 KB (1K x 14) Flash |
| Data Memory (SRAM) | 224 bytes |
| EEPROM | 128 bytes |
| Maximum Clock Frequency | 4 MHz (04 speed grade) |
| Instruction Set | 35 single-cycle instructions |
| Operating Voltage Range | 2.0 V to 5.5 V (supports 2.5/3.3/5 V rails) |
| I/O Pins | 16 bidirectional |
| Analog Comparators | 2 with programmable VREF |
| Timers | TMR0 (8-bit), TMR1 (16-bit), TMR2 (8-bit PWM) |
| Communication | AUSART (RS-232/RS-485) |
| Package | 20-pin SSOP (0.65 mm pitch, 5.30 mm body) |
| Operating Temperature | -40 C to +85 C (Industrial) |
| Mounting Type | Surface Mount |
| MSL Level | 1 |
| Lead Free / RoHS | Yes / Compliant |
PIC16LF627T-04I/SS Pin Configuration
| Pin 1 | RA5/AN4/T1CKI — Bidirectional I/O, analog channel 4, or Timer1 clock input |
| Pin 2 | RA4/AN3/T0CKI — Bidirectional I/O, analog channel 3, or Timer0 clock input |
| Pin 3 | RA3/AN2/VREF+ — Bidirectional I/O, analog channel 2, or positive comparator VREF |
| Pin 4 | RA2/AN1/VREF- — Bidirectional I/O, analog channel 1, or negative comparator VREF |
| Pin 5 | RA1/AN1/CIN-/CVREF — Bidirectional I/O, comparator 1 negative input, or VREF output |
| Pin 6 | RA0/AN0/CIN+ — Bidirectional I/O, analog channel 0, comparator 1 positive input |
| Pin 7 | OSC1/CLKIN — Crystal oscillator input or external clock input |
| Pin 8 | OSC2/CLKOUT — Crystal oscillator output or clock output |
| Pin 9 | VSS — Ground reference |
| Pin 10 | T0CKI/INT/RB0 — PORTB bit 0, external interrupt, or Timer0 clock |
| Pin 11 | RB1/RX/DT — PORTB bit 1, USART RX or data line |
| Pin 12 | RB2/TX/CK — PORTB bit 2, USART TX or clock line |
| Pin 13 | RB3/CCP1 — PORTB bit 3, Capture/Compare/PWM 1 |
| Pin 14 | RB4 — PORTB bit 4 with interrupt-on-change |
| Pin 15 | RB5 — PORTB bit 5 with interrupt-on-change |
| Pin 16 | RB6/PGC — PORTB bit 6, in-circuit debugger clock |
| Pin 17 | RB7/PGD — PORTB bit 7, in-circuit debugger data |
| Pin 18 | VDD — Positive supply (2.0V to 5.5V) |
| Pin 19 | VSS — Ground reference |
| Pin 20 | MCLR/VPP — Master Clear reset (active low) or programming voltage input |
Typical Applications
PIC16LF627T-04I/SS is suitable for 6 applications: Industrial Sensor Threshold Detection, Battery-Powered Remote Sensor Node, Appliance Front-Panel Controller, Automotive Interior Accessory Module, RS-485 Sensor Network Node, LED Lighting Controller.
Industrial Sensor Threshold Detection
The PIC16LF627T-04I/SS fits industrial sensor threshold detection because its two on-chip analog comparators with programmable VREF allow direct comparison of analog signals against a software-set reference without external op-amps. Its 16-bit TMR1 timer captures comparator events with 1 us resolution at 4 MHz, and the industrial -40C to +85C range survives factory-floor temperature swings. The 2.0V to 5.5V supply range lets the part run directly from a 3.3V sensor rail. With 16 mA sink/source per I/O, it can drive indicator LEDs or relay coils directly, simplifying the BOM. Typical design places the sensor output on RA0/RA1 (CIN+/CIN-) and triggers a firmware state change on comparator interrupt, enabling zero-latency alarm response. Compared with discrete op-amp + timer designs, this PIC integrates the entire front-end into one 20-pin SSOP, reducing PCB area by up to 60%.
Recommended
Battery-Powered Remote Sensor Node
The PIC16LF627T-04I/SS suits battery-powered remote sensor nodes because its LF silicon is characterized down to 2.0V, allowing direct operation from two AA alkaline cells across their full discharge curve (3.0V to 2.0V). The 4 MHz clock supports moderate sampling rates while keeping active current under 2 mA typical. Sleep mode with Watchdog Timer wake-up extends battery life to multiple years in duty-cycled applications. The integrated USART interfaces with sub-GHz radios (Si4432, RFM69) for wireless telemetry. The 20-pin SSOP package supports compact PCB designs inside sealed enclosures. Designers should add a 0.1 uF decoupling capacitor near VDD and route the MCLR pin through a 10 kohm pull-up for reliable reset behavior during brown-out events.
Recommended
Appliance Front-Panel Controller
The PIC16LF627T-04I/SS integrates well into appliance front-panel controllers because its 16 high-current I/O pins directly sink LED segments without driver transistors, reducing BOM cost. The 1.75 KB Flash accommodates state-machine firmware for washers, ovens, or HVAC controllers, while 128 bytes EEPROM retains user settings across power cycles. The two analog comparators monitor AC-line zero-crossing signals for TRIAC dimming or motor speed control. The 4 MHz instruction rate delivers 1 us resolution for timing-critical tasks like triac phase-angle firing. Industrial temperature rating suits laundry or kitchen environments, and SSOP-20 reflows cleanly on lead-free profiles. Compared with discrete logic ICs, this PIC eliminates 3-5 chips per panel.
Recommended
Automotive Interior Accessory Module
The PIC16LF627T-04I/SS works for non-safety automotive interior accessories such as ambient lighting controllers, seat-position memory, or aftermarket gauge drivers because its industrial temperature rating handles cabin extremes and its wide supply tolerance survives 12V battery transients with proper filtering. Note: this part is NOT AEC-Q100 qualified - for safety-critical ECUs, designers must use the PIC16F627A-I/SS automotive-grade family. The PIC16LF627's USART drives LIN-bus slave nodes when paired with a LIN transceiver like MCP2021. The integrated comparators detect switch closures without external circuitry. Two AA-cell or 12V-to-5V supply rails are both supported by the wide voltage range.
Recommended
RS-485 Sensor Network Node
The PIC16LF627T-04I/SS serves as an RS-485 sensor network node because its integrated AUSART implements RS-485 framing with a single external transceiver like MAX485 or LTC485. The 4 MHz core supports polled protocols (Modbus RTU) at 9600 to 38400 baud with low interrupt overhead. The 16 I/O pins connect to multiple sensors or actuator outputs in a single node. Industrial temperature rating fits outdoor or factory deployments. Compared with discrete UART chips, this part adds Flash-based firmware customization per node, allowing unique calibration constants and node IDs. The 20-pin SSOP footprint fits inside standard 35 mm DIN-rail enclosures.
Recommended
LED Lighting Controller
The PIC16LF627T-04I/SS fits LED lighting controllers because its 16 I/O pins each sink 25 mA - enough for direct LED matrix driving without driver ICs. The TMR2 PWM module generates 8-bit PWM for dimming, and the analog comparators sense ambient light or current feedback. The wide 2.0V-5.5V supply runs from a single 3.3V or 5V rail, or even from a small lithium cell. SSOP-20 reflows cleanly in automated assembly. Compared with dedicated LED drivers, this PIC adds intelligence (fade patterns, color sequencing, response to button events) at lower cost for under-16-LED installations like accent strips or signage.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LF627T-04I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LF627AT-I/SS | PIC16LF627-04I/SS | PIC16LF627A-I/P | PIC16LF627T-04/SO | PIC16LF627-04I/SO | PIC16LF627-04I/P |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-pin SSOP (5.30 mm) | 20-pin SSOP - same | 20-pin SSOP - same | 20-pin PDIP - different footprint | 20-pin SOIC - different footprint | 20-pin SOIC - different footprint | 20-pin PDIP - different footprint |
| Core Architecture | 8-bit PIC16 RISC | 8-bit PIC16 RISC | 8-bit PIC16 RISC | 8-bit PIC16 RISC | 8-bit PIC16 RISC | 8-bit PIC16 RISC | 8-bit PIC16 RISC |
| Max Clock Frequency | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| Flash Memory | 1.75 KB | 1.75 KB | 1.75 KB | 1.75 KB | 1.75 KB | 1.75 KB | 1.75 KB |
| SRAM | 224 bytes | 224 bytes | 224 bytes | 224 bytes | 224 bytes | 224 bytes | 224 bytes |
| Operating Voltage | 2.0V to 5.5V | 2.0V to 5.5V | 2.0V to 5.5V | 2.0V to 5.5V | 2.0V to 5.5V | 2.0V to 5.5V | 2.0V to 5.5V |
| Temperature Range | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| I/O Pins | 16 | 16 | 16 | 16 | 16 | 16 | 16 |
Key Differentiators
- Tape-and-reel packaging for high-volume SMD assembly (vs PIC16LF627-04I/SS)
- 'A' silicon revision with improved BOR and lower power (vs PIC16LF627-04I/SS)
- Through-hole PDIP option for prototyping and breadboarding (vs PIC16LF627T-04/SO)
Design Notes
Decouple VDD (pin 18) with a 0.1 uF ceramic capacitor placed within 5 mm of the pin, plus a 10 uF bulk tantalum or aluminum polymer capacitor on the same trace. The PIC16LF627T-04I/SS contains an internal Brown-out Detect (BOD) that may mis-trigger if VDD droops below 2.0V during load transients. Add a ferrite bead or small inductor (10 uH) on VDD when switching loads share the rail. Per Microchip design guidance, hold MCLR high through a 10 kohm pull-up to VDD to ensure clean reset.
Route the crystal traces (OSC1/OSC2, pins 7 and 8) on the top layer with a grounded guard ring, and keep them shorter than 10 mm to minimize stray capacitance. SSOP-20 thermal pad is not present, so a 4 mm x 4 mm copper pour on pin 9 (VSS) aids heat dissipation at 4 MHz full-load operation. Place C1/C2 crystal loading capacitors within 3 mm of the oscillator pins. Avoid routing signal traces under the crystal to prevent coupling.
Do not assume the LF silicon runs at 5V F-only specifications - the PIC16F627 datasheet minimum is 3.0V, but the LF version (PIC16LF627T) is characterized down to 2.0V, which is the entire reason for the LF suffix. Programming voltage on MCLR/VPP must reach 13V during ICSP programming - ensure your ICSP header does not have series resistance that drops the voltage below VPP_min. The TMR1 external clock (T1CKI/RA5) can only be sourced when the timer is configured for external clock mode in T1CON; do not leave RA5 floating if T1CKI is enabled.
Compliance Information
RoHS and lead-free per Microchip product page. Not AEC-Q100 qualified - this part is industrial grade only and must not be used in automotive safety-critical applications; for AEC-Q100 qualified alternatives, contact Microchip for PIC16F627A-E/SS automotive family.
