IS61NLF25618A-7.5TQLI ISSI, Integrated Silicon Solution Inc, IS61NLF25618A-7.5TQLI Datasheet - Page 9

• Manufacturer Part Number: IS61NLF25618A-7.5TQLI
• Description: IC SRAM 4MBIT 117MHZ 100TQFP
• Manufacturer: ISSI, Integrated Silicon Solution Inc

Specifications of IS61NLF25618A-7.5TQLI

• Format - Memory: RAM
• Memory Type: SRAM - Synchronous
• Memory Size: 4M (256K x 18)
• Speed: 117MHz
• Interface: Parallel
• Voltage - Supply: 3.135 V ~ 3.465 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-TQFP, 100-VQFP
• Density: 4Mb
• Access Time (max): 7.5ns
• Sync/async: Synchronous
• Architecture: SDR
• Clock Freq (max): 117MHz
• Operating Supply Voltage (typ): 3.3V
• Address Bus: 18b
• Package Type: TQFP
• Operating Temp Range: -40C to 85C
• Number Of Ports: 2
• Supply Current: 160mA
• Operating Supply Voltage (min): 3.25V
• Operating Supply Voltage (max): 3.465V
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 100
• Word Size: 18b
• Number Of Words: 256K
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

IS61NLF12836A/IS61NVF12836A
IS61NLF25618A/IS61NVF25618A
STATE DIAGRAM
SYNCHRONOUS TRUTH TABLE
Notes:
1. "X" means don't care.
2. The rising edge of clock is symbolized by ↑
3. A continue deselect cycle can only be entered if a deselect cycle is executed first.
4. WE = L means Write operation in Write Truth Table.
5. Operation finally depends on status of asynchronous pins (ZZ and OE).
Integrated Silicon Solution, Inc. — www.issi.com
Rev. C
05/28/08
Operation
Not Selected
Not Selected
Not Selected
Not Selected Continue
Begin Burst Read
Continue Burst Read
NOP/Dummy Read
Dummy Read
Begin Burst Write
Continue Burst Write
NOP/Write Abort
Write Abort
Ignore Clock
WE = H means Read operation in Write Truth Table.
READ
BURST
READ
BURST
READ
BEGIN
BURST
External Address
External Address
External Address
READ
Current Address
Next Address
Next Address
Next Address
Next Address
Address
Used
N/A
N/A
N/A
N/A
N/A
(1)
WRITE
DS
DS
READ
DS
CE
CE
CE
CE
CE
H
X
X
X
X
X
X
X
X
L
L
L
L
DESELECT
WRITE
READ
CE2
X
X
X
H
X
H
X
H
X
H
X
X
L
CE
CE
CE
CE
CE2
X
X
H
X
X
X
X
X
X
L
L
L
L
WRITE
BURST
DS
ADV
DS
H
H
H
H
H
X
L
L
L
L
L
L
L
READ
WE
WE
WE
WE
WE
X
X
X
X
H
X
H
X
X
X
X
L
L
BURST
WRITE
BEGIN
BURST
WRITE
BW
BW
BW
BW
BWx
X
X
X
X
X
X
X
X
H
H
X
L
L
WRITE
OE
OE
OE
OE
OE
X
X
X
X
H
H
X
X
X
X
X
L
L
BURST
WRITE
CKE
CKE
CKE
CKE
CKE
H
L
L
L
L
L
L
L
L
L
L
L
L
CLK
↑
↑
↑
↑
↑
↑
↑
↑
↑
↑
↑
↑
↑
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