IS61LV256-15J ISSI, Integrated Silicon Solution Inc, IS61LV256-15J Datasheet - Page 6

• Manufacturer Part Number: IS61LV256-15J
• Description: SRAM 256K 32Kx8 15ns 3.3v
• Manufacturer: ISSI, Integrated Silicon Solution Inc
• Type: Asynchronousr

Specifications of IS61LV256-15J

• Memory Size: 256 Kbit
• Access Time: 15 ns
• Package / Case: SOJ-28
• Supply Voltage (max): 3.63 V
• Supply Voltage (min): 2.97 V
• Maximum Operating Current: 90 mA
• Organization: 32 K x 8
• Interface: TTL
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Number Of Ports: 1
• Operating Supply Voltage: 3.3 V
• Lead Free Status / Rohs Status: No

AC WAVEFORMS
WRITE CYCLE NO. 1 (
IS61LV256
2-6
WRITE CYCLE SWITCHING CHARACTERISTICS
Notes:
1. Test conditions assume signal transition times of 3ns or less, timing reference levels of 1.5V, input pulse levels of 0 to 3.0V and
2. Tested with the load in Figure 1b. Transition is measured 500 mV from steady-state voltage. Not 100% tested.
3. The internal write time is defined by the overlap of
4. Tested with
Symbol Parameter
t
t
t
t
t
t
t
t
t
t
output loading specified in Figure 1a.
but any one can go inactive to terminate the Write. The Data Input Setup and Hold timing are referenced to the rising or falling
edge of the signal that terminates the Write.
WC
SCE
AW
HA
SA
PWE
SD
HD
HZWE
LZWE
(4)
(2)
(2)
Write Cycle Time
CE
Address Setup Time to Write End
Address Hold from Write End
Address Setup Time
WE
Data Setup to Write End
Data Hold from Write End
WE
WE
ADDRESS
to Write End
Pulse Width
LOW to High-Z Output
HIGH to Low-Z Output
OE
D
OUT
HIGH.
WE
D
CE
IN
WE
WE WE
WE WE
Controlled)
t
DATA UNDEFINED
SA
Min.
12
—
8
8
0
0
8
6
0
0
-12 ns
(1,2)
Max.
CE
t
—
—
—
—
—
—
—
—
—
6
AW
t
HZWE
LOW and
t
SCE
t
WC
t
PWE
Min.
15
10
10
10
—
0
0
8
0
0
WE
HIGH-Z
-15 ns
(1,3)
LOW. All signals must be in valid states to initiate a Write,
(Over Operating Range)
t
Max.
SD
—
—
—
—
—
—
—
—
—
7
DATA-IN VALID
Min.
t
20
13
15
13
10
—
HA
0
0
0
0
t
t
-20 ns
LZWE
HD
Max.
Integrated Silicon Solution, Inc.
—
—
—
—
—
—
—
—
—
8
Min.
25
15
20
15
12
—
0
0
0
0
-25 ns
Max.
10
—
—
—
—
—
—
—
—
—
ISSI
SR81995LV61
Rev. F 0296
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
®