AS4DDR232M72PBG Datasheet, PDF (1/28 Pages) Austin Semiconductor – 32Mx72 DDR2 SDRAM iNTEGRATED Plastic Encapsulated Microcircuit

iPEM
2.4 Gb SDRAM-DDR2
Austin Semiconductor, Inc. AS4DDR232M72PBG
32Mx72 DDR2 SDRAM
iNTEGRATED 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* tCK
„ Organized as 32M x 72 w/ support for x80
„ Weight: AS4DDR232M72PBG ~ 3.5 grams typical
NOTE: Self Refresh Mode available on Industrial and Enhanced temp. only
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)
FUNCTIONAL BLOCK DIAGRAM
Ax, BA0-1
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
VCCL
VSSDL
A
2
2
2
3
3
DQ0-15 B
VCCL
VSSDL
B
2
2
2
3
3
DQ16-31 C
VCCL
VSSDL
C
2
2
2
3
3
DQ32-47 D
VCCL
VSSDL
D
2
2
2
3
3
DQ64-79
DQ48-63
AS4DDR232M72PBG
Rev. 2.0 5/07
Austin Semiconductor, Inc. ● Austin, Texas ● 512.339.1188 ● www.austinsemiconductor.com
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