DS1345WP-100IND

Memory IC Overview

The DS1345WP-100IND is a 3.3V 1024k Nonvolatile SRAM with an integrated battery monitor, organized as 131,072 words by 8 bits. It features 100 ns read and write access times and operates within a supply voltage range of 3.0V to 3.6V. The device provides a minimum data retention of 10 years without external power and includes automatic write protection during power loss. Designed for the industrial temperature range of -40°C to +85°C, it utilizes a 34-pin PowerCap Module package that allows direct surface mounting while protecting the internal lithium energy source from high-temperature reflow soldering.

Memory IC Feature Summary

• Integrates a self-contained lithium energy source and control circuitry to automatically maintain data integrity during power failures
• Includes dedicated system power monitoring that asserts a reset signal when VCC falls out of tolerance and holds the processor in reset during ramp-up
• Features a battery monitor that performs daily checks on remaining capacity and asserts a warning output if voltage drops below the trip point
• Utilizes a replaceable snap-on PowerCap design that electrically disconnects the lithium source until initial power application to preserve freshness

Memory IC Applications

• Direct upgrade replacement for 128k x 8 SRAM, EEPROM, or Flash components
• Processor-based systems requiring automatic data protection during power loss events
• Industrial applications operating within the extended temperature range of -40°C to +85°C

Memory IC Procurement Notes

Verify the specific IND suffix confirms the industrial temperature rating of -40°C to +85°C rather than the commercial range. Confirm that the DS9034PC PowerCap module is ordered separately, as it is required to complete the nonvolatile SRAM assembly. Ensure the design accommodates the open-drain outputs for RST and BW pins by including appropriate external pullup resistors.

Memory IC Selection Notes

Select this component when a static RAM solution requires nonvolatile data retention without complex backup circuitry. The 34-pin PowerCap Module format facilitates surface-mount assembly while isolating the lithium battery from thermal stress. Consider the 100 ns access speed and 3.3V operation for compatibility with standard logic families. Verify that the system can support the required 3.0V to 3.6V supply voltage range.

Memory IC Part Context

The DS1345W belongs to the Maxim Integrated NV SRAM family designed to simplify nonvolatile memory implementation. These devices combine fast static RAM with integrated battery management to eliminate external backup components. The PowerCap Module packaging standardizes the interface for various NV SRAM products, allowing designers to swap memory types while maintaining pinout compatibility.

Memory IC Replacement Considerations

DS1345WP-100+