FT25C16A-USR-T

Overview

The FT25C16A-USR-T is a 16-kbit serial EEPROM from Fremont Micro Devices, organized as 2K x 8 bits. It features a high-speed SPI interface with a maximum clock frequency of 20 MHz and an access time of 550 ns. The device operates on a supply voltage range of 1.8V to 5.5V and supports a write cycle time of 5 ms. It is housed in an 8-SOP surface-mount package and functions within an operating temperature range of -40°C to 85°C.

Feature Summary

• Supports high-speed serial data transfer via a standard SPI interface for efficient system integration.
• Provides non-volatile storage capability, retaining data without power supply.
• Operates across a wide voltage range, facilitating compatibility with mixed-voltage logic systems.

Applications

• Data logging in industrial control systems
• Configuration storage in consumer electronics
• Parameter retention in automotive embedded modules

Procurement Notes

Verify the specific suffix 'USR' confirms the 8-SOP package and tape-and-reel shipping format. Ensure the component date code aligns with project requirements. Confirm that the 20 MHz SPI speed meets the target controller's timing constraints. Validate that the 1.8V to 5.5V supply range matches the system power rails. Check for RoHS compliance documentation if required by regional regulations.

Selection Notes

Select this part when a small, fast serial memory is needed for configuration or log data. The 16-kbit capacity is suitable for limited parameter storage. The SPI interface reduces pin count compared to parallel alternatives. The wide voltage range allows use in both low-power and legacy 5V designs. Consider the SOP package size for PCB layout constraints.

Part Context

This component belongs to the FT25Cxx series of serial EEPROMs from Fremont Micro Devices. The series utilizes a 20 MHz SPI interface, distinguishing it from I²C-based counterparts like the FT24Cxx line. These devices are designed for applications requiring byte-level read/write operations without prior sector erasure, offering flexibility in data management.

Replacement Considerations

Compatible substitutes include other 16-kbit SPI EEPROMs from manufacturers such as Microchip (e.g., 25AA16A) or STMicroelectronics (e.g., M25P16). Verify pinout compatibility, specifically VCC, GND, CS, SCK, SI, and SO. Ensure the replacement supports the same 1.8V minimum voltage and 20 MHz clock speed. Confirm the package type matches the existing footprint.

FAQ

Does the FT25C16A-USR-T require a sector erase before writing?

No, the FT25C16A-USR-T supports byte-level programming without the need for prior sector or block erasure.

What is the maximum SPI clock frequency for this device?

The maximum serial clock frequency (SCK) is 20 MHz at VCC = 2.7V to 5.5V.