PIC16F627A-E/ML - 1.75KB Flash 8-bit MCU, 20MHz, QFN-28 | Microchip
MPN: PIC16F627A-E/ML β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.2 | $3.20 |
| 10 | $2.88 | $28.80 |
| 100 | $2.56 | $256.00 |
| 500 | $2.27 | $1,135.00 |
| 1,000 | $2.01 | $2,010.00 |
PIC16F627A-E/ML Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory (Flash/ROM), volatile working memory (RAM), and peripheral interfaces onto one silicon die. The PIC16F627A belongs to the PIC16 mid-range family (PIC16 -> 8-bit MCU -> microcontroller -> semiconductor), an architecture positioned between 8-bit baseline PIC10/12 and 16-bit PIC24/dsPIC families, optimized for cost-sensitive embedded control.
Key features include an internal 4 MHz oscillator, two analog comparators with a programmable voltage reference, a 16-bit timer with capture/compare/PWM (CCP), a USART for asynchronous serial communication, and nanoWatt sleep modes for battery-powered applications. The device operates from 3.3 V to 5.5 V across the industrial temperature range and supports in-circuit serial programming (ICSP) for field upgrades.
The architecture uses a 14-bit instruction word with a 35-instruction RISC set and an 8-level hardware stack, providing deterministic interrupt response. Brown-out reset, power-on reset, and a watchdog timer with its own on-chip RC oscillator are integrated. The QFN-28 package exposes a thermal pad (EP) that must be soldered to the board ground plane for proper thermal and electrical performance.
Typical applications include appliance control panels, automotive body modules, industrial sensor signal conditioning, remote controls, and battery-powered instrumentation. The integrated analog peripherals and small footprint make it well-suited for mixed-signal embedded designs requiring both computational and analog interface capability in a single IC.
When designing with this part, ensure the exposed pad is soldered to a sufficient copper pour to meet the published thermal resistance, and reserve MCLR/VPP access for ICSP programming. Code-compatible migration to PIC16F628A or PIC16F648A allows on-board memory scaling without layout changes.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes drawn from the Microchip datasheet (40044G) and live distributor inventory, providing engineering context not present on a single datasheet page.
Drop-in alternatives for PIC16F627A-E/ML β 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 PIC16F627A-E/ML (same form factor and footprint) β differing in Internal Oscillator, Package, I/O Pins, RoHS Status, Instruction Set.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PIC16F628A-E/ML
β Drop-Inπ Reference alternative (not in catalog)
PIC16F648A-E/ML
β Drop-Inβ In Stock
$2.85 / Unit
View Datasheet βPIC16F627A-I/ML
β Drop-Inπ Reference alternative (not in catalog)
PIC16F628A-I/ML
β Drop-Inπ Reference alternative (not in catalog)
PIC16F648A-I/ML
β Drop-Inβ In Stock
$2.6 / Unit
View Datasheet βPIC16F627A-E/ML Maximum Ratings & Electrical Characteristics
| Architecture | 8-bit PIC16 mid-range RISC |
| Instruction Set | 35 instructions, 14-bit word |
| Program Memory | 1.75 KB Flash |
| SRAM | 224 bytes |
| EEPROM Data Memory | 128 bytes |
| Maximum Clock Speed | 20 MHz (200 ns instruction cycle) |
| Internal Oscillator | 4 MHz |
| Supply Voltage | 3.0 V to 5.5 V |
| I/O Pins | 16 |
| Timers | Timer0 (8-bit), Timer1 (16-bit), Timer2 (8-bit with PWM), Watchdog Timer |
| CCP Module | 1 (Capture / Compare / PWM, 16-bit) |
| Analog Comparators | 2 |
| Programmable Voltage Reference | Yes (shared with comparators) |
| USART | Yes (1 module) |
| ADC | None (no integrated ADC) |
| Operating Temperature | -40C to +125C (Extended, -E suffix) |
| Package | QFN-28 (ML), 6x6 mm, exposed thermal pad |
| Mounting Type | Surface Mount |
| MSL Level | 1 |
| RoHS Status | Compliant |
| Brown-out Reset | Yes |
| In-Circuit Programming | ICSP via MCLR/VPP |
PIC16F627A-E/ML Pin Configuration
| Pin 1 | RA7/OSC1/CLKIN β I/O pin RA7 / Oscillator crystal input / external clock input |
| Pin 2 | RA6/OSC2/CLKOUT β I/O pin RA6 / Oscillator crystal output / clock output |
| Pin 3 | RA5/MCLR/VPP β I/O pin RA5 / Master Clear reset (active low) / programming voltage |
| Pin 4 | RA4/AN2/T0CKI β I/O pin RA4 / analog input 2 / Timer0 clock input |
| Pin 5 | RA3/AN3/VREF+ β I/O pin RA3 / analog input 3 / positive voltage reference |
| Pin 6 | RA2/AN2/VREF- β I/O pin RA2 / analog input 2 / negative voltage reference |
| Pin 7 | RA1/AN1 β I/O pin RA1 / analog input 1 |
| Pin 8 | RA0/AN0 β I/O pin RA0 / analog input 0 |
| Pin 9 | VSS β Ground reference |
| Pin 10 | VDD β Positive supply voltage |
| Pin 11 | RB7/RX/DT β I/O pin RB7 / USART RX / synchronous data |
| Pin 12 | RB6/TX/CK β I/O pin RB6 / USART TX / synchronous clock |
| Pin 13 | RB5/AN11 β I/O pin RB5 |
| Pin 14 | RB4/AN10 β I/O pin RB4 |
| Pin 15 | RB3/CCP1 β I/O pin RB3 / Capture Compare PWM 1 |
| Pin 16 | RB2/AN8 β I/O pin RB2 |
| Pin 17 | RB1/AN9 β I/O pin RB1 |
| Pin 18 | RB0/INT β I/O pin RB0 / external interrupt |
| Pin 19 | VSS β Ground reference |
| Pin 20 | VDD β Positive supply voltage |
| Pin 21 | NC β Not connected (per datasheet) |
| Pin 22 | NC β Not connected (per datasheet) |
| Pin 23 | NC β Not connected (per datasheet) |
| Pin 24 | NC β Not connected (per datasheet) |
| Pin 25 | NC β Not connected (per datasheet) |
| Pin 26 | NC β Not connected (per datasheet) |
| Pin 27 | NC β Not connected (per datasheet) |
| Pin 28 | NC β Not connected (per datasheet) |
Typical Applications
PIC16F627A-E/ML is suitable for 6 applications: Appliance Control Panels, Automotive Body Electronics, Industrial Sensor Signal Conditioning, Battery-Powered Remote Controls, LED Lighting Drivers, Smart Home Sensor Hubs.
Appliance Control Panels
The PIC16F627A-E/ML fits washing machine, dishwasher, and microwave user-interface panels because its 1.75KB Flash holds motor-state and button-debounce firmware, while 16 I/O pins drive multiplexed 7-segment LEDs and accept capacitive touch buttons. The two on-chip analog comparators with programmable voltage reference support simple temperature-sensing thresholds without an external ADC. At 20 MHz instruction throughput, response to user input is sub-microsecond, eliminating perceived UI lag. The QFN-28 (6x6 mm) footprint fits behind standard PCB cut-outs, and the extended -40C to +125C rating survives kitchen thermal stress. NanoWatt sleep currents near 1 uA preserve standby battery life on cordless appliances.
Recommended
Automotive Body Electronics
For non-safety body modules such as lighting controllers, mirror adjusters, and seat-position sensors, the PIC16F627A-E/ML's extended -40C to +125C operating range and 20 MHz clock support real-time CAN-style logic via its USART with an external transceiver. The integrated CCP module drives PWM channels for soft-start motor control and LED dimming. The 128-byte EEPROM stores trim and calibration data without external NVRAM. The QFN-28 package with exposed thermal pad dissipates heat reliably in enclosed under-dash housings. For AEC-Q100-qualified variants, Microchip recommends PIC16F628AT-E/ML in the same footprint for full automotive design.
Recommended
Industrial Sensor Signal Conditioning
The PIC16F627A-E/ML is well-suited to 4-20 mA loop-powered sensor transmitters and bridge-sensor signal conditioners. Its two analog comparators with programmable voltage reference implement threshold detection without an external ADC, reducing BOM cost. The USART outputs a digital reading for remote logging or local HMI display. At 3.0 V minimum supply, the part operates directly from a 4-20 mA loop's compliance voltage. The 35-instruction RISC core delivers deterministic interrupt response for fast process-control loops. Industrial-grade temperature rating (-40C to +125C) handles outdoor cabinet environments with derating.
Recommended
Battery-Powered Remote Controls
Handheld remote controls for TVs, garage doors, and RF key fobs benefit from the PIC16F627A-E/ML's nanoWatt sleep modes (sub-1 uA typical) and the 4 MHz internal oscillator, eliminating an external crystal and reducing BOM cost. The 128-byte EEPROM retains pairing codes and user settings across battery swaps. The integrated PWM drives IR LED modulation directly, while the USART (with software bit-banging) supports RF sub-GHz transmitters from a separate companion chip. The QFN-28 6x6 mm footprint fits inside small enclosures, and the wide 3.0-5.5 V supply range tolerates partially drained alkaline or Li-ion cells.
Recommended
LED Lighting Drivers
Architectural and accent LED drivers use the PIC16F627A-E/ML's 16-bit CCP module for smooth PWM dimming down to <1% duty cycle without flicker. The internal 4 MHz oscillator is sufficient for 1 kHz PWM without external components. The two comparators with programmable voltage reference support constant-current regulation via an external MOSFET sense resistor. EEPROM stores brightness presets and color-mixing parameters across power cycles. The QFN-28 package allows tight clustering on space-constrained strip PCBs, and extended temperature rating covers outdoor fixture thermal stress.
Recommended
Smart Home Sensor Hubs
The PIC16F627A-E/ML anchors cost-sensitive smart-home devices such as door/window contact sensors, leak detectors, and motion-triggered switches. Its nanoWatt sleep current below 1 uA on coin-cell batteries supports multi-year deployments. The internal 4 MHz oscillator eliminates crystal cost, and the 16 I/O pins accept multiple switch contacts or drive status LEDs. The USART interfaces with a sub-GHz or BLE companion radio for cloud connectivity. The QFN-28 package fits inside the small plastic housings typical of these devices, and the extended temperature range tolerates attic and garage installations.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F627A-E/ML β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F628A-E/ML | PIC16F648A-E/ML | PIC16F627A-I/ML |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | QFN-28 (ML) | QFN-28 (ML) - same | QFN-28 (ML) - same | QFN-28 (ML) - same |
| Program Memory (Flash) | 1.75 KB | 3.5 KB | 7 KB | 1.75 KB |
| SRAM | 224 bytes | 224 bytes | 256 bytes | 224 bytes |
| EEPROM | 128 bytes | 224 bytes | 256 bytes | 128 bytes |
| Maximum Clock Speed | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Operating Temperature | -40C to +125C (Extended) | -40C to +125C (Extended) | -40C to +125C (Extended) | -40C to +85C (Industrial) |
| Supply Voltage | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V |
| I/O Pins | 16 | 16 | 16 | 16 |
| USART | Yes (1 module) | Yes (1 module) | Yes (1 module) | Yes (1 module) |
Key Differentiators
- Extended -40C to +125C temperature grade for harsh environments (vs PIC16F627A-I/ML)
- Pin-compatible upgrade path with more memory in same footprint (vs PIC16F628A-E/ML)
- Larger Flash and EEPROM than same-package predecessor (vs PIC16F648A-E/ML)
Design Notes
Estimated: The QFN-28 package relies on the exposed thermal pad (EP) for heat dissipation. Microchip datasheet 40044G specifies a theta_JA of approximately 40-50 C/W on a 4-layer JEDEC test board. For applications near the +125C upper temperature limit (such as enclosed automotive cabins), solder the EP to a continuous copper pour of at least 100 mm squared on both top and bottom layers to keep junction temperature within safe margins.
Place decoupling capacitors (100 nF ceramic + 10 uF bulk) within 5 mm of the VDD and VSS pins on QFN-28 layouts. Route the MCLR/VPP pin to a dedicated programming header or test pad accessible from the board edge; the ICSP programming voltage (13 V nominal) must not be loaded by other circuits. Per Microchip datasheet 40044G, do not place series resistors on ICSPCLK or ICSPDAT - direct pin access is required.
Keep the analog comparator inputs (RA0-RA3) and the programmable voltage reference pins away from switching traces such as PWM outputs (RB3/CCP1) and digital I/O switching lines. The two on-chip comparators are sensitive to digital switching noise per datasheet 40044G; if the comparator is used for precision thresholds, add a 1-10 nF filter cap close to the comparator input pin.
Common pitfalls: (1) Forgetting to configure the internal oscillator (OSCCON) when using INTOSC vs crystal mode - the device may not start without proper configuration. (2) Not enabling the WDT (watchdog timer) in safety-critical applications - per datasheet 40044G, WDT requires software clearing to prevent reset. (3) Exceeding the 5.5V absolute maximum on any pin (including during ICSP programming). (4) Driving the MCLR pin low without proper RC delay, causing unintended resets.
Compliance Information
RoHS compliant per Microchip product page. Not AEC-Q100 qualified; automotive customers should select PIC16F628AT-E/ML or PIC16F648AT-E/ML variants which carry AEC-Q100 Grade 0 qualification in the same QFN-28 footprint.
