AS4C8M16D1-5TCNTR

Memory IC Overview

The AS4C8M16D1-5TCNTR is a 128Mb DDR SDRAM manufactured by Alliance Memory. It features an 8M x 16 organization with a 200 MHz maximum clock frequency and operates on a 2.5V power supply. The device utilizes a 66-pin TSOP II package with a 0.65mm pin pitch. Designed for commercial applications, it supports a temperature range of 0°C to +70°C. Key electrical parameters include a 2.3V to 2.7V operating voltage window and SSTL_2 I/O interface compatibility.

Memory IC Feature Summary

• Supports fully synchronous operation with internal pipeline architecture and four independent memory banks.
• Features programmable mode registers allowing configuration of CAS latency, burst length, and burst type.
• Includes DLL enable/disable functionality via the Extended Mode Register Set (EMRS).
• Provides individual byte write mask control and auto precharge capabilities.

Memory IC Applications

• High-performance embedded systems requiring high memory bandwidth.
• Consumer electronics utilizing double data rate memory interfaces.
• Industrial control units operating within commercial temperature ranges.
• Digital signal processing applications needing fast access times.

Memory IC Procurement Notes

Verify the specific ordering suffix '5TCNTR' against official datasheets to confirm the 66-pin TSOP II package and commercial temperature rating. Ensure the component meets RoHS compliance standards as indicated by the 'N' suffix. Cross-reference the manufacturer's part number with distributor listings to validate authenticity and current availability status before finalizing procurement orders.

Memory IC Selection Notes

Select this component when a 128Mb capacity with a 16-bit data bus width is required. The 200 MHz speed class suits designs needing high throughput. Verify that the system design accommodates the 66-pin TSOP II footprint. Confirm that the application environment remains within the specified commercial temperature limits of 0°C to +70°C for reliable operation.

Memory IC Part Context

This part belongs to the AS4C8M16D1 series of 128Mb DDR SDRAMs from Alliance Memory. The series offers various packaging options including FBGA and TSOP II. Variants exist for industrial temperature ranges and different organizational structures. This specific model targets commercial-grade applications requiring standard surface-mount integration.

Memory IC Replacement Considerations

Check for direct substitutes within the same AS4C8M16D1 family, such as variants with industrial temperature ratings or alternative packages like TFBGA. Ensure any replacement maintains identical pinout, voltage requirements, and timing specifications to guarantee circuit compatibility without redesign.

Memory IC FAQ

What is the function of the DLL in this SDRAM?

The Delay-Locked Loop (DLL) can be enabled or disabled via the Extended Mode Register Set (EMRS) to manage timing alignment for high-speed data transfers.

How is the burst length configured?

The burst length is programmed using the Mode Register Set (MRS) command, supporting lengths of 2, 4, or 8.