參數(shù)資料
型號(hào): IS42S32800B
廠商: Integrated Silicon Solution, Inc.
英文描述: 2M Words x 32 Bits x 4 Banks (256-MBIT) SYNCHRONOUS DYNAMIC RAM
中文描述: 200萬(wàn)字× 32位× 4銀行(256兆)同步動(dòng)態(tài)RAM
文件頁(yè)數(shù): 23/62頁(yè)
文件大?。?/td> 939K
代理商: IS42S32800B
Integrated Silicon Solution, Inc. — 1-800-379-4774
Rev.
B
0
5/24
/06
23
ISSI
IS42S32800B
(Notes Continued)
6. A.C. Test Conditions
LVTTL Interface
Reference Level of Output Signals
Output Load
Input Signal Levels
Transition Time (Rise and Fall)of Input Signals
Reference Level of Input Signals
1.4V /1.4V
Reference to the Under Output Load
2.4V /0.4V
1ns
1.4V
1.4V
50
Output
30pF
Z0=
50
LVTTL A.C. Test Load
7.
Transition times are measured between VIH and VIL.Transition(rise and fall)of input signals are in a fixed slope
(1 ns).
t
HZ
defines the time in which the outputs achieve the open circuit condition and are not at reference levels.
If clock rising time is longer than 1 ns,(t
R
/2 -0.5)ns should be added to the parameter.
10. Assumed input rise and fall time t
T
(t
R
&t
F
)=1 ns
If t
R
or t
F
is longer than 1 ns,transient time compensation should be considered,i.e.,[(tr +tf)/2 -1 ]ns
should be added to the parameter.
11. Power up Sequence
Power up must be performed in the following sequence.
1) Power must be applied to V
DD
and V
DDQ
(simultaneously)when all input signals are held “NOP”state
and both CKE =”H”and DQM =”H.”The CLK signals must be started at the same
time.
2) After power-up,a pause of 200
μ
seconds minimum is required.Then,it is recom
mended that DQM is held “HIGH”(V
DD
levels)to ensure DQ output is in high
impedance.
3) All banks must be precharged.
4) Mode Register Set command must be asserted to initialize the Mode register.
5) A minimum of 2 Auto-Refresh dummy cycles must be required to stabilize the internal circuitry of the device.
8.
9.
相關(guān)PDF資料
PDF描述
IS42S32800B-6B 2M Words x 32 Bits x 4 Banks (256-MBIT) SYNCHRONOUS DYNAMIC RAM
IS42S32800B-6BI 2M Words x 32 Bits x 4 Banks (256-MBIT) SYNCHRONOUS DYNAMIC RAM
IS42S32800B-6BL 2M Words x 32 Bits x 4 Banks (256-MBIT) SYNCHRONOUS DYNAMIC RAM
IS42S32800B-6BLI 2M Words x 32 Bits x 4 Banks (256-MBIT) SYNCHRONOUS DYNAMIC RAM
IS42S32800B-6T 2M Words x 32 Bits x 4 Banks (256-MBIT) SYNCHRONOUS DYNAMIC RAM
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