參數(shù)資料
型號(hào): μPD45D128442
廠商: NEC Corp.
英文描述: 128 M-bit Synchronous DRAM with Double Data Rate(128 同步動(dòng)態(tài)RAM)
中文描述: 128 M位同步雙數(shù)據(jù)速率(128同步動(dòng)態(tài)RAM的內(nèi)存)
文件頁(yè)數(shù): 39/80頁(yè)
文件大小: 637K
代理商: ΜPD45D128442
39
μ
PD45D128442, 45D128842, 45D128164
Preliminary Data Sheet
13.6 AC Characteristics (Recommended Operating Conditions unless otherwise noted)
13.6.1 Test Conditions
Parameter
Symbol
Value
Unit
Notes
Input Reference voltage (Input timing measurement reference level)
V
REF
V
CC
Q x 0.5
V
Termination voltage (Output timing measurement reference level)
V
TT
V
REF
V
1
High level ac input voltage
V
IH
(ac)
V
REF
+ 0.35
V
Low level ac input voltage
V
IL
(ac)
V
REF
0.35
V
Input signal slew rate
SLEW
1
V/ns
2
Notes 1.
Output waveform timing is measured where the output signal crosses through the V
TT
level.
2.
Slew rate is to be maintained in the V
IL
(ac) to V
IH
(ac) range of the input signal swing. SLEW = (V
IH
(ac)-
V
IL
(ac))/
t
Output
R
S
= 25
R
T
= 25
C
LOAD
= 30 pF
V
TT
= 0.5 x V
CC
Q
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