23LCV512T-E/ST

Memory IC Overview

The Microchip Technology 23LCV512T-E/ST is a 512-Kbit Serial SRAM device housed in an 8-lead TSSOP package. It features a SPI-compatible bus interface with support for SDI (Serial Dual Interface) mode, operating at clock rates up to 20 MHz. The memory organization is 64K x 8-bit. The device supports a supply voltage range of 2.5V to 5.5V and operates within an industrial temperature range of -40°C to +125°C. It includes an external battery backup input (VBAT) for data retention.

Memory IC Feature Summary

• Supports unlimited read and write cycles with zero write time.
• Features an external battery backup pin (VBAT) for maintaining data during power loss.
• Compatible with standard SPI protocols and offers an optional Serial Dual Interface (SDI) mode for increased data throughput.
• Provides Byte, Page, and Sequential modes for flexible memory access operations.

Memory IC Applications

• Data logging systems requiring non-volatile-like behavior via battery backup.
• Microcontroller-based embedded systems needing fast random access memory.
• Industrial control applications operating in extended temperature environments.
• Portable devices utilizing low-power serial interfaces for configuration storage.

Memory IC Procurement Notes

Verify the specific suffix 'E' indicates the extended temperature range (-40°C to +125°C), as datasheets primarily detail the Industrial ('I') grade (-40°C to +85°C). Confirm the 'T' suffix corresponds to tape-and-reel packaging if required for automated assembly. Ensure the host system supports the 2.5V to 5.5V supply range and 20 MHz clock frequency specifications.

Memory IC Selection Notes

Select this component when high-speed serial access is required alongside data retention capabilities during power interruptions. The 23LCV512 is suitable for designs needing more speed than EEPROMs but with backup features unlike standard volatile SRAMs. Consider the SDI mode if bandwidth requirements exceed standard SPI limits. Ensure the PCB layout accommodates the VBAT pin connection for the backup circuit.

Memory IC Part Context

This part belongs to the 23LCV512 family of serial SRAMs from Microchip Technology. It shares functional similarities with the 23LC512 but adds the VBAT pin for battery backup functionality. The device is designed to interface directly with microcontrollers supporting SPI or dual I/O interfaces, serving as a drop-in replacement for volatile memory in systems requiring data persistence.

Memory IC Replacement Considerations

The 23LC512 is a related variant without battery backup. Verify if the VBAT pin is necessary for the application. Other Microchip serial SRAMs like the 23LC1024 offer larger capacities but may require software adjustments for address mapping.

Memory IC FAQ

What is the function of the VBAT pin?

The VBAT pin allows an external battery or coin cell to maintain SRAM data when the main VCC supply falls below the trip point voltage.

Does the device support dual I/O operations?

Yes, the 23LCV512 supports SDI (Serial Dual Interface) mode, allowing two bits to be entered per clock cycle using SIO0 and SIO1 pins.

How does the device handle page boundaries during writes?

In Page mode, the internal address counter wraps around to the start of the page if a write exceeds the 32-byte boundary. In Sequential mode, it rolls over to address 0x0000 after reaching the end of the array.