AS4DDR232M72PBG Datasheet | Austin Semiconductor

i PEM 2.4 G b SDRAM-DDR2 Gb Austin Semiconductor, Inc. AS4DDR232M72PBG 32Mx72 DDR2 SDRAM i NTEGRATED Plastic Encapsulated Microcircuit Features - - - - - - - - - - - - - - - - - - DDR2 Data rate = 667, 533, 400 Available in Industrial, Enhanced and Extended Temp Package: - 255 Plastic Ball Grid Array (PBGA), 25 x 32mm - 1.27mm pitch Differential data strobe (DQS, DQS#) per byte Internal, pipelined, double data rate architecture 4-bit prefetch architecture DLL for alignment of DQ and DQS transitions with clock signal Four internal banks for concurrent operation (Per DDR2 SDRAM Die) Programmable Burst lengths: 4 or 8 Auto Refresh and Self Refresh Modes On Die Termination (ODT) Adjustable data - output drive strength 1.8V ±0.1V power supply and I/O (VCC/VCCQ) Programmable CAS latency: 3, 4, 5, or 6 Posted CAS additive latency: 0, 1, 2, 3 or 4 Write latency = Read latency - 1- t CK Organized as 32M x 72 w/ support for x80 Weight: AS4DDR232M72PBG ~ 3.5 grams typical BENEFITS - - - - - - SPACE conscious PBGA defined for easy SMT manufacturability (50 mil ball pitch) Reduced part count 47% I/O reduction vs Individual CSP approach Reduced trace lengths for lower parasitic capacitance Suitable for hi-reliability applications Upgradable to 64M x 72 density (consult factory for info on AS4DDR264M72PBG) NOTE: Self Refresh Mode available on Industrial and Enhanced temp. only .. FUNCTIONAL Ax, BA0-1 BLOCK DIAGRAM ODT VRef VCC VCCQ VSS VSSQ VCCL VSSDL CS0 CS1 CS2 CS3 CS4 UDMx, LDMx UDSQx,UDSQx LDSQx, LDSQx RASx,CASx,WEx CKx,CKx,CKEx A 2 2 2 3 3 A VCCL VSSDL 2 2 2 3 3 B VCCL VSSDL 2 2 2 3 3 C VCCL VSSDL 2 2 2 3 3 2 2 2 3 3 D VCCL VSSDL DQ64-79 DQ0-15 B DQ16-31 C DQ32-47 D DQ48-63 AS4DDR232M72PBG Rev. 2.0 5/07 Austin Semiconductor,...