TMS48C138-70DJ

Overview

The TMS48C138-70DJ is a Fast Page Mode Dynamic Random Access Memory (DRAM) integrated circuit manufactured by Texas Instruments. It features a memory density of 128K x 8 bits, providing a total storage capacity of 1 Megabit. The device operates with a maximum access time of 70 nanoseconds, which supports system clock frequencies up to approximately 14.3 MHz. This component is designed for high-speed data retrieval in legacy computing and industrial control applications requiring reliable volatile memory storage.

Feature Summary

• Supports Fast Page Mode operation for efficient sequential data access
• CMOS technology implementation for low power consumption
• Single +5V power supply requirement
• Active product status ensuring ongoing manufacturing support

Applications

• Legacy microprocessor-based computer systems
• Industrial control units requiring volatile data storage
• Embedded systems utilizing 8-bit architecture
• Test and measurement equipment memory modules

Procurement Notes

Verify the specific suffix 'DJ' indicates the correct package type and temperature range for your design requirements. Confirm that the 70ns access time aligns with your system's timing constraints. Ensure compatibility with existing DRAM controllers supporting Fast Page Mode protocols before procurement.

Selection Notes

Select this component when a 128Kx8 DRAM configuration is required with 70ns speed performance. Consider the physical package dimensions and pinout compatibility with your PCB layout. Evaluate if the single voltage supply meets your power budget compared to newer multi-voltage alternatives.

Part Context

This part belongs to the Texas Instruments TMS48 series of Fast Page DRAMs. It serves as a standard memory solution for older generation digital logic designs. The device complements other TI memory products like the TMS48C138-10DJ, offering different speed grades within the same density family.

Replacement Considerations

The TMS48C138-10DJ is a confirmed substitute offering faster 10ns access times within the same 128Kx8 density. Verify pin compatibility and timing margins when substituting slower parts for faster ones or vice versa.