IS42S32800B-7B ISSI, Integrated Silicon Solution Inc, IS42S32800B-7B Datasheet - Page 26

• Manufacturer Part Number: IS42S32800B-7B
• Description: IC SDRAM 256MBIT 143MHZ 90BGA
• Manufacturer: ISSI, Integrated Silicon Solution Inc

Specifications of IS42S32800B-7B

• Format - Memory: RAM
• Memory Type: SDRAM
• Memory Size: 256M (8Mx32)
• Speed: 143MHz
• Interface: Parallel
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 90-BGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

IS42S32800B
26
Figure 3.Auto Refresh (CBR)(Burst Length=4,CAS#Latency=2)
A0-A9
BS0,1
RAS#
CAS#
CS#
WE#
CLK
CKE
DQM
A10
DQ
DQ
Precharge All
T0
Command
t
T1
CK2
t
RP
T2
Auto Refresh
Command
T3 T4 T5 T6 T7
t
RC
Auto Refresh
T8
Command
T9
T10
T11
t
T12
RC
T13
T14
Command
Activate
Bank A
RAx
RAx
T15 T16 T17 T18 T19
Command
Integrated Silicon Solution, Inc.
Bank A
Read
CAx
Ax0
Ax1
T20
Ax2
T21
Ax3
T22
07/21/09
Rev. F