AS4C64M16D2A-25BIN [Alliance Memory]

The AS4C64M16D2A is a 1Gb DDR2 SDRAM organized as 64M x 16 bits. It features JEDEC standard compliance, 1.8V I/O (SSTL_18-compatible), and internal configuration of 8 banks (8Mb addresses x 16 I/Os). Key DDR2 features include posted CAS# with additive latency, Write latency = Read latency -1, Off-Chip Driver (OCD) impedance adjustment, and On-Die Termination (ODT). The device operates at 400 MHz with differential clocks (CK/CK#), bidirectional data strobes (DQS/DQS#), and supports burst lengths of 4 or 8. It includes programmable mode registers, auto refresh/self refresh, and is available in an 84-ball FBGA package.