IS42S32800B-7BL INTEGRATED SILICON SOLUTION (ISSI), IS42S32800B-7BL Datasheet - Page 27

• Manufacturer Part Number: IS42S32800B-7BL
• Description: IC, SDRAM, 256MBIT, 143MHZ, BGA-90
• Manufacturer: INTEGRATED SILICON SOLUTION (ISSI)

Specifications of IS42S32800B-7BL

• Memory Type: DRAM - Sychronous
• Access Time: 7ns
• Page Size: 256Mbit
• Ic Interface Type: Parallel
• Memory Case Style: BGA
• No. Of Pins: 90
• Operating Temperature Range: 0°C To +70°C
• Termination Type: SMD
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

IS42S32800B
Integrated Silicon Solution, Inc.
Rev. F
07/21/09
Figure 4.Power on Sequene and Auto Refresh (CBR)
BS0, 1
DQM
CKE
RAS
ADD
CAS
CLK
A10
WE
DQ
CS
Hi-Z
Inputs
must
for 200us
be stable
T0 T1 T2 T3 T4 T5 T6 T7
High Level is Necessary
Precharge
Command
All Banks
High level
is required
t
RP
1st Auto
Refresh
Command
Minimum of 2 Refresh Cycles are required
T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22
2nd Auto
Refresh
Command
t
RC
Mode
Set Command
Address Key
Register
t
MRS
Command
27