AS4C128M16D2-25BIN

The Alliance AS4C128M16D2-25BIN is a high-performance DDRII Synchronous DRAM (SDRAM) designed for high-speed data transfer rates. It features a 400 MHz system frequency, achieving data transfer rates of up to 800 Mbps/pin. This memory device is organized as 8 banks x 16Mbit x 16, utilizing an 8-bank architecture for concurrent operation.

Key features include a 4-bit prefetch architecture, programmable CAS Latency (3, 4, 5, 6, 7), and programmable Additive Latency (0-6). The device supports write latency equal to read latency minus one. It offers programmable wrap sequences (Sequential or Interleave) and programmable burst lengths of 4 and 8.

Operating with a JEDEC standard power supply of 1.8V ± 0.1V for both VDD and VDDQ, the AS4C128M16D2-25BIN is suitable for a wide range of applications. It includes features like Power Down Mode, Auto Refresh, Self Refresh, and Partial Array Self Refresh (PASR). The memory operates within a case temperature range of 0°C to 85°C.

This component is available in an 84-ball FBGA package. It also incorporates On-Die Termination (ODT) and a weak strength data-output driver option. The device features bidirectional differential data strobes (DQS, DQS) and differential clock inputs (CK, CK) for reliable signal integrity. An on-chip DLL aligns DQ and DQS transitions with CK transitions.