25LC160A-E/ST

Overview

The Microchip Technology 25LC160A-E/ST is a 16 Kbit Serial Electrically Erasable PROM featuring a 2048 x 8-bit organization. It utilizes an SPI-compatible serial bus with a maximum clock frequency of 10 MHz. The device operates within a supply voltage range of 2.5 V to 5.5 V and supports an industrial temperature range from -40°C to +125°C. It is housed in an 8-lead TSSOP package.

Feature Summary

• Supports self-timed erase and write cycles with a maximum duration of 5 ms.
• Includes built-in power-on/off data protection circuitry and a write enable latch.
• Features programmable block write protection for none, one-quarter, one-half, or all memory arrays.
• Provides a hold function to pause communication without resetting the serial sequence.

Applications

• Microcontroller system data storage
• Industrial control applications
• Automotive electronic systems

Procurement Notes

Verify that the specific ordering suffix matches the required package type and temperature grade. Confirm the 'E' designation aligns with automotive-grade specifications if intended for high-temperature environments. Ensure compatibility with the host system's SPI interface requirements before procurement.

Selection Notes

Select this component when a 16-byte page size is required for write operations. Choose the E variant for automotive-grade reliability and extended temperature ranges. Verify that the TSSOP package fits the available PCB footprint constraints. Ensure the host microcontroller supports the necessary SPI modes for reliable data transfer.

Part Context

This part belongs to the 25XX160A/B family of 16 Kbit Serial EEPROMs. The 'A' version specifically denotes a 16-byte page size, distinguishing it from the 'B' version which offers a 32-byte page size. All variants share the same pinout and core functionality while differing in packaging and temperature ratings.

Replacement Considerations

The 25LC160B-E/ST serves as a direct functional substitute, offering identical electrical characteristics but with a 32-byte page size instead of 16 bytes. Users must ensure software handles page boundary crossings appropriately when switching between these versions.

FAQ

How does the HOLD pin function during operation?

The HOLD pin allows the user to pause serial communication without resetting the sequence. When pulled low while SCK is low, the SO pin goes high-impedance. Communication resumes when HOLD is brought high while SCK is low.

What is the difference between the 25LC160A and 25LC160B page sizes?

The 25LC160A features a 16-byte page size, whereas the 25LC160B has a 32-byte page size. Both devices support up to their respective page limits per write cycle.