參數資料
型號: K4F641612D-TI
廠商: SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述: 4M X 16BIT CMOS DYNAMIC RAM WITH FAST PAGE MODE
中文描述: 4米× 16位的CMOS動態(tài)RAM的快速頁面模式
文件頁數: 5/35頁
文件大小: 400K
代理商: K4F641612D-TI
CMOS DRAM
K4F661612D,
K4F641612D
CAPACITANCE
(T
A
=25
°
C, V
CC
=3.3V, f=1MHz)
Industrial Temperature
Parameter
Symbol
Min
Max
Units
Input capacitance [A0 ~ A12]
C
IN1
-
5
pF
Input capacitance [RAS, UCAS, LCAS, W, OE]
C
IN2
-
7
pF
Output capacitance [DQ0 - DQ15]
C
DQ
-
7
pF
Test condition : V
CC
=3.3V
±
0.3V, Vih/Vil=2.2/0.7V, Voh/Vol=2.0/0.8V
Parameter
Symbol
-45
-50
-60
Units
Note
Min
Max
Min
Max
Min
Max
Random read or write cycle time
t
RC
80
90
110
ns
Read-modify-write cycle time
t
RWC
115
133
153
ns
Access time from RAS
t
RAC
45
50
60
ns
3,4,10
Access time from CAS
t
CAC
12
13
15
ns
3,4,5
Access time from column address
t
AA
23
25
30
ns
3,10
CAS to output in Low-Z
t
CLZ
t
OFF
0
0
0
ns
3
Output buffer turn-off delay
0
13
0
13
0
13
ns
6
Transition time (rise and fall)
t
T
1
50
1
50
1
50
ns
2
RAS precharge time
t
RP
25
30
40
ns
RAS pulse width
t
RAS
45
10K
50
10K
60
10K
ns
RAS hold time
t
RSH
12
13
15
ns
CAS hold time
t
CSH
t
CAS
45
50
60
ns
CAS pulse width
12
10K
13
10K
15
10K
ns
RAS to CAS delay time
t
RCD
18
33
20
37
20
45
ns
4
RAS to column address delay time
t
RAD
13
22
15
25
15
30
ns
10
CAS to RAS precharge time
t
CRP
5
5
5
ns
Row address set-up time
t
ASR
0
0
0
ns
Row address hold time
t
RAH
t
ASC
8
10
10
ns
Column address set-up time
0
0
0
ns
13
Column address hold time
t
CAH
8
10
10
ns
13
Column address to RAS lead time
t
RAL
23
25
30
ns
Read command set-up time
t
RCS
0
0
0
ns
Read command hold time referenced to CAS
t
RCH
t
RRH
0
0
0
ns
8
Read command hold time referenced to RAS
0
0
0
ns
8
Write command hold time
t
WCH
8
10
10
ns
Write command pulse width
t
WP
8
10
10
ns
Write command to RAS lead time
t
RWL
13
15
15
ns
Write command to CAS lead time
t
CWL
12
13
15
ns
16
Data set-up time
t
DS
t
DH
0
0
0
ns
9,19
Data hold time
10
10
10
ns
9,19
AC CHARACTERISTICS
(-40
°
C
T
A
85
°
C, See note 2)
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