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DP8428 датащи(PDF) 21 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
номер детали DP8428
подробное описание детали  1 Megabit High Speed Dynamic RAM Controller/Drivers
PDF  26 Pages
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производитель  NSC [National Semiconductor (TI)]
домашняя страница  http://www.national.com
Logo NSC - National Semiconductor (TI)

DP8428 датащи(HTML) 21 Page - National Semiconductor (TI)

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Switching Characteristics DP8428 and DP8429 (Continued)
VCC e 50V g 10% 0 C s TA s 70 C unless otherwise noted (Notes 2 4 5) the output load capacitance is typical for 4
banks of 22 DRAMs each or 88 DRAMs including trace capacitance
These values are Q0-Q9 CL e 500 pF RAS0–RAS3 CL e 150 pF WE CL e 500 pF CAS CL e 600 pF RL e 500X
unless otherwise noted See
Figure 11 for test load Maximum propagation delays are specified with all outputs
switching
Preliminary
Symbol
Access Parameter
Condition
CL
All CL e 50 pF
Units
Min
Max
Min
Max
tRCDL1
RAS to CAS Low Delay
Figure 6
34
63
ns
(RAHS e 1)
DP8428-8029-80
tRCDL1
RAS to CAS Low Delay
Figure 6
34
55
ns
(RAHS e 1)
DP8428-7029-70
tRCDH
RAS to CAS High Delay
Figure 6
22
ns
tRAH0
Row Address Hold Time
Figure 6
25
25
ns
(RAHS e 0 Mode 5)
tRAH1
Row Address Hold Time
Figure 6
15
15
ns
(RAHS e 1 Mode 5)
tASC
Column Address Set-up Time
Figure 6
00
ns
(Mode 5)
tRCV0
RASIN to Column Address
Figure 6
94
ns
Valid (RAHS e 0 Mode 5)
DP8428-8029-80
tRCV0
RASIN to Column Address
Figure 6
85
ns
Valid (RAHS e 0 Mode 5)
DP8428-7029-70
tRCV1
RASIN to Column Address
Figure 6
76
ns
Valid (RAHS e 1 Mode 5)
DP8428-8029-80
tRCV1
RASIN to Column Address
Figure 6
68
ns
Valid (RAHS e 1 Mode 5)
DP8428-7029-70
tRPDL
RASIN to RAS Low Delay
Figures 5a 5b 6
21
18
ns
tRPDH
RASIN to RAS High Delay
Figures 5a 5b 6
20
17
ns
tASRL
Address Set-up to RASIN low
Figures 5a 5b 6
13
ns
tAPD
Address Input to Output
Figures 5a 5b 6
36
25
ns
Delay
tSPD
Address Strobe High to
Figures 5a 5b
48
ns
Address Output Valid
tASA
Address Set-up Time to ADS
Figures 5a 5b 6
5ns
tAHA
Address Hold Time from ADS
Figures 5a 5b 6
10
ns
tADS
Address Strobe Pulse Width
Figures 5a 5b 6
26
ns
tWPD
WIN to WE Output Delay
Figure 5b
28
ns
tCPDL
CASIN to CAS Low Delay
Figure 5b
17
33
ns
(RC low Mode 4)
tCPDH
CASIN to CAS High Delay
Figure 5b
13
33
ns
(RC low Mode 4)
tCPdif
tCPDL -tCPDH
See Mode 4
13
ns
Description
tRCC
Column Select to Column
Figure 5a
41
ns
Address Valid
tRCR
Row Select to Row
Figures 5a 5b
45
ns
Address Valid
tRHA
Row Address Held from
Figure 5a
7ns
Column Select
tCCAS
RC Low to CAS Low Delay
Figure 5a
50
ns
(CASIN Low Mode 4)
DP8428-8029-80
tCCAS
RC Low to CAS Low Delay
Figure 5a
46
ns
(CASIN Low Mode 4)
DP8428-7029-70
tDIF1
Maximum (tRPDL -tRHA)
See Mode 4
7
ns
Description
tDIF2
Maximum (tRCC -tCPDL)13
ns
21



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