參數(shù)資料
型號(hào)： NTE6664
廠商： NTE Electronics, Inc.
英文描述： Integrated Circuit 64K-Bit Dynamic RAM
中文描述： 集成電路64K的位動(dòng)態(tài)隨機(jī)存儲(chǔ)器
文件頁(yè)數(shù)： 3/5頁(yè)
文件大小： 39K
代理商： NTE6664
Read, Write, and Read
–
Modify
–
Write Cycles (Cont
’
d):
(V
CC
= 5V
±
10%, T
A
= 0 to +70
°
C
unless otherwise specified, Notes 6, 7, and 8)
Symbol
Test Conditions
t
RCD
Note 14
t
ASR
t
RAH
t
ASC
t
CAH
t
AR
Note 18
t
T
t
RCS
t
RCH
Note 15
t
RRH
Note 15
t
WCH
t
WCR
Note 18
t
WP
t
RWL
t
CWL
t
DS
Note 16
t
DH
Note 16
t
DHR
Note 18
t
CRP
t
RSH
t
RFSH
t
WCS
Note 17
t
CWD
Note 17
t
RWD
Note 17
t
CSH
t
CP
t
PC
t
RFD
t
FBP
t
FBR
Parameter
Min
25
0
20
0
35
95
3
0
0
0
35
95
35
45
45
0
35
95
–
10
75
–
–
10
45
120
150
60
145
–
10
2000
320
Typ
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
Max
75
–
–
–
–
–
50
–
–
–
–
–
–
–
–
–
–
–
–
–
2
–
–
–
–
–
–
–
–
–
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ms
ns
ns
ns
ns
ns
ns
ns
ns
ns
RAS to CAS Delay Time
Row Address Setup Time
Row Address Hold Time
Column Address Setup Time
Column Address Hold Time
Column Address Hold Time Referenced to RAS
Transition Time (Rise and Fall)
Read Command Setup Time
Read Command Hold Time Referenced to CAS
Read Command Hold Time Referenced to RAS
Write Command Hold Time
Write Command Hold Time Referenced to RAS
Write Command Pulse Width
Write Command to RAS Lead Time
Write Command to CAS Lead Time
Data in Setup Time
Data in Hold Time
Data in Hold Time Referenced to RAS
CAS to RAS Precharge Time
RAS Hold Time
Refresh Period
Write Command Setup Time
CAS to Write Delay
RAS to Write Delay
CAS Hold Time
CAS Precharge Time (Page Mode Cycle Only)
Page Mode Cycle Time
RAS to REFRESH Delay
REFRESH Period (Battery Backup Mode)
REFRESH to RAS Precharge Time
(Battery Backup Mode)
REFRESH Cycle Time (Auto Pulse Mode)
REFRESH Pulse Period (Auto Period Mode)
REFRESH to RAS Setup Time (Auto Pulse Mode)
REFRESH to RAS Delay Time (Auto Pulse Mode)
REFRESH Inactive Time
RAS to REFRESH Lead Time
RAS Inactive Time During REFRESH
t
FC
t
FP
t
FSR
t
FRD
t
FI
t
FRL
t
FRI
270
60
–
30
320
60
370
370
–
–
–
–
–
–
–
–
ns
ns
ns
ns
ns
ns
ns
2000
–
–
–
–
–
Note 6. V
IH
min and V
IL
max are reference levels for measuring timing of input signals. Transition
times are measured between V
IH
and V
IL
.
Note 7. An initial pause of 100
μ
s is required after power
–
up followed by 8 RAS cycles before proper
device operation is guaranteed.
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