ATSAML21E18B-AUT

Overview

The ATSAML21E18B-AUT is an ARM microcontroller from the SAML21 series, featuring an ARM Cortex-M0+ core operating at a maximum clock frequency of 48 MHz. It integrates 256 kB of program memory and 32 kB of SRAM data RAM within a TQFP-32 package. The device supports a supply voltage range of 1.62 V to 3.63 V and includes 25 I/O lines. Peripheral interfaces include I2C, LIN, SPI, USART, and USB. It features a 12-bit ADC with 10 channels, a 12-bit DAC, and six timer/counters.

Feature Summary

• Integrates a high-performance ARM Cortex-M0+ processor core for efficient code execution.
• Provides extensive connectivity through multiple communication interfaces including USB, SPI, and USART.
• Includes analog peripherals such as a 12-bit ADC and DAC for signal processing applications.

Applications

• Low-power sensor nodes requiring wireless or wired connectivity
• Industrial control systems utilizing LIN or SPI interfaces
• Portable battery-operated devices due to wide voltage support

Procurement Notes

Verify the specific suffix 'AUT' confirms AEC-Q100 automotive qualification status against the official Microchip datasheet. Confirm the TQFP-32 package dimensions and pinout match the target PCB footprint. Ensure the operating temperature range meets system requirements. Cross-reference the manufacturer part number directly with the original equipment manufacturer's documentation to avoid counterfeit components.

Selection Notes

Select this component when automotive-grade reliability is required alongside standard SAML21 performance. Compare memory sizes against alternatives like the ATSAMD21 series if non-automotive options are acceptable. Evaluate pin count availability versus I/O requirements. Consider power consumption profiles relative to the application's duty cycle and sleep modes supported by the Cortex-M0+ architecture.

Part Context

This part belongs to the Microchip SAML21 family, which extends the popular SAMD21 line with added automotive qualification. It shares architectural similarities with other SAML21 variants but differs in memory capacity and package type. The E18 designation typically indicates specific memory configurations within the series.

Replacement Considerations

ATSAMD21E18A-AUT offers similar specifications but lacks the explicit automotive qualification listed for the SAML21 variant in some distributor data. Other SAML21 models with different memory sizes may require software adaptation.