Microchip Technology ATTINY1627-MFR

Overview

ATTINY1627-MFR from Microchip Technology is a 24-pin VQFN-packaged 8-bit AVR® microcontroller with 16 KB Flash, 2 KB SRAM, and 256B EEPROM, operating up to 20 MHz at 1.8–5.5 V. It integrates a 12-bit differential ADC with PGA, two USARTs, SPI, TWI, RTC, six-event channels, and four CCL LUTs-designed for low-power embedded control in sensor nodes and industrial I/O modules.

For engineers reviewing the ATTINY1627-MFR datasheet, ATTINY1627-MFR pinout, ATTINY1627-MFR application, or ATTINY1627-MFR equivalent, key selection criteria include its 22 GPIO count, UPDI single-pin debug interface, 375 ksps ADC sampling rate, and AEC-Q100-qualified variants (e.g., ATTINY1627-VAO) for automotive-grade reliability.

Technical Context

The ATTINY1627-MFR implements the AVR CPU with hardware multiplier and two-level vectored interrupt controller, enabling deterministic real-time response. Its peripheral set includes one TCA timer with three PWM outputs, two TCB timers with input capture, and an RTC driven by internal 32.768 kHz ULP oscillator or external crystal.

Event System enables CPU-independent inter-peripheral signaling-e.g., ADC conversion completion can directly trigger TCB capture without software intervention. The Configurable Custom Logic (CCL) block provides four LUTs for glue logic offload, supporting asynchronous edge detection and stateless signal conditioning.

Key Specifications

Pinout & Package

VQFN-24 package (4 mm × 4 mm, 0.5 mm pitch), thermally enhanced with exposed thermal pad. Pinout conforms to Microchip DS40002234A-page 16 (24-pin VQFN).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit microcontroller applications.

Compared with ATTINY1627-MFR, ATTINY1626-MFR reduces I/O count and package size while maintaining identical architecture and peripheral feature set; ATTINY3227-MFR scales Flash/SRAM upward without altering pinout or timing behavior-enabling seamless vertical migration within the tinyAVR® 2 family.

Availability

ATTINY1627-MFR is available at Aetrix Electronics and suitable for industrial sensor nodes, smart HVAC actuators, and programmable I/O terminals requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for ATTINY1627-MFR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology Inc. is a leading provider of microcontrollers, analog, FPGA, and mixed-signal solutions, headquartered in Chandler, Arizona.

The ATTINY1627-MFR belongs to the tinyAVR® 2 family-designed for cost-sensitive, low-power embedded applications demanding high integration, robust debug capability (UPDI), and AEC-Q100-ready variants for automotive use cases.

FAQ

What is the maximum operating frequency of the ATTINY1627-MFR?

The ATTINY1627-MFR operates up to 20 MHz at supply voltages from 4.5 V to 5.5 V. At 2.7–5.5 V, it supports up to 10 MHz, and at the full 1.8–5.5 V range, it runs up to 5 MHz. These speed grades are defined in the electrical characteristics table of DS40002234A, ensuring reliable timing across industrial temperature ranges. The ATTINY1627-MFR uses an internal 20 MHz low-power oscillator that is factory-calibrated and lockable.

Does the ATTINY1627-MFR support hardware debugging, and how is it implemented?

Yes, the ATTINY1627-MFR supports hardware debugging via the Unified Program and Debug Interface (UPDI), a single-pin interface using a high-voltage pulse (12 V) to enter programming/debug mode. This eliminates the need for dedicated debug headers and reduces PCB footprint. The ATTINY1627-MFR implements UPDI in silicon with full support for breakpoints, register inspection, and flash memory read/write-all accessible through Microchip's MPLAB® Snap or PICkit™ 4 tools.

How many analog input channels does the ATTINY1627-MFR ADC support, and what is its resolution?

The ATTINY1627-MFR integrates a single 12-bit differential successive-approximation ADC with up to 15 selectable input channels. It supports programmable gain amplification (PGA) with gains of 1×, 2×, 4×, 8×, or 16×, and achieves a maximum sampling rate of 375 ksps. The ADC includes internal references (1.024 V, 2.048 V, 2.5 V, 4.096 V, and VDD) and differential mode operation to reject common-mode noise-key features confirmed in DS40002234A Sections 24 and 25.

Is the ATTINY1627-MFR pin-compatible with other tinyAVR® 2 family members?

Yes, the ATTINY1627-MFR is fully pin-compatible with the ATTINY1626-MFR and ATTINY1624-MFR in their respective 24-pin, 20-pin, and 14-pin packages-but only within the same package type. For example, the 24-pin VQFN variant of ATTINY1627-MFR shares identical pin mapping with no functional differences on shared pins. However, ATTINY1627-MFR exposes additional PC[5:0] pins not present on smaller variants, making it the highest-I/O option in the 24-pin footprint.

What sleep modes does the ATTINY1627-MFR support, and what is the lowest typical current draw?

The ATTINY1627-MFR supports three sleep modes: Idle (all peripherals active), Standby (selective peripheral retention), and Power-Down (full clock stop with SRAM/registers retained). In Power-Down mode with BOD disabled and WDT off, the typical current draw is 200 nA at 1.8 V and 25°C-verified in DS40002234A Section 33.1. This ultra-low quiescent current makes the ATTINY1627-MFR suitable for energy-harvesting and long-life battery applications where wake-on-pin-change or RTC alarm is used.