AT25320B-SSHL-B

Memory IC Overview

The AT25320B-SSHL-B is a 32-kilobit serial electrically-erasable programmable read-only memory (EEPROM) manufactured by Microchip Technology. It provides 4,096 words of 8 bits each and operates with a supply voltage range of 1.8V to 5.5V. The device supports SPI clock frequencies up to 20MHz at 5V, 10MHz at 2.5V, and 5MHz at 1.8V. It utilizes an 8-lead JEDEC SOIC package and functions within an industrial temperature range of -40°C to +85°C.

Memory IC Feature Summary

• Supports standard SPI modes 0 and 3 for synchronous data transfer
• Includes hardware write protection via the WP pin and software block protection
• Features self-timed write cycles without requiring separate erase operations
• Provides high endurance and long-term data retention capabilities

Memory IC Applications

• Industrial applications requiring low-power operation
• Commercial systems utilizing low-voltage logic
• Microcontroller-based designs needing non-volatile storage

Memory IC Procurement Notes

Verify the specific ordering suffix to confirm the shipping carrier option, as bulk tubes differ from tape and reel configurations. Ensure the lead finish matches system requirements, noting that the 'H' designation indicates NiPdAu. Confirm the operating temperature grade aligns with the intended environmental conditions before finalizing procurement.

Memory IC Selection Notes

Select this component when a 32-kilobit capacity is required alongside a compact 8-lead SOIC footprint. The device is suitable for designs needing flexible voltage operation between 1.8V and 5.5V. Consider the available block write protection levels if data security against inadvertent writes is a priority in the target application architecture.

Memory IC Part Context

This part belongs to the AT25320B/640B family of serial EEPROMs designed for space-saving implementations. The series offers various package options including TSSOP, UDFN, XDFN, and VFBGA. The AT25320B variant specifically provides 32Kb density, while the AT25640B offers 64Kb, sharing identical interface protocols and functional characteristics.

Memory IC Replacement Considerations

AT25320B-XHL-B

Memory IC FAQ

How does the HOLD pin function during serial communication?

The HOLD pin pauses serial communication without resetting the sequence. It must be brought low while SCK is low to pause, and high to resume.

What is the maximum write cycle time for this device?

The self-timed write cycle has a maximum duration of 5ms across all specified voltage ranges.