DP8419N-70 National Semiconductor, DP8419N-70 Datasheet - Page 24

• Manufacturer Part Number: DP8419N-70
• Description: IC CTRLR 256K DRAM 48-DIP
• Manufacturer: National Semiconductor

Specifications of DP8419N-70

• Controller Type: Dynamic RAM (DRAM) Controller, Drivers
• Voltage - Supply: 4.5 V ~ 5.5 V
• Current - Supply: 150mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Through Hole
• Package / Case: 48-DIP (0.600", 15.24mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Interface: -
• Other names: *DP8419N-70

Symbol
REFRESH (Continued)
t
t
t
t
t
DP8419 DP8419X ONLY
t
t
DP8418 ONLY
t
t
DP8417 ONLY
t
t
TRI-STATE (DP8417 ONLY)
t
t
t
t
t
Switching Characteristics DP8417 DP8418 DP8419 DP8419X
V
of 22 DRAMs each or 88 DRAMs including trace capacitance
unless otherwise noted See Figure 11a for test load S1 is open unless otherwise specified Maximum propagation
delays are specified with all outputs switching
RQHRF
RFRH
RFSRG
CSHR
RKRL
CSRL1
CSRL0
CSRL1
CSRL0
CSRL1
CSRL0
ZH
HZ
HZ
ZL
LZ
CC
These values are Q0-Q8 C
e
5 0V
g
RFSH Hold Time from RGCK
RFSH High to RAS High
(Ending Forced Refresh
early)
RFSH Low Set-up to
RGCK Low (Mode 1)
CS High to RASIN Low for
Hidden Refresh
RFCK High to RASIN
low for hidden Refresh
CS Low to Access RASIN
Low (Using Mode 5 with
Auto Refresh Mode)
CS Low to Access RASIN
Low (Using Modes 4 or 5
with externally controlled
Refresh)
CS Low to Access RASIN
Low (Using Mode 5 with
Auto Refresh Mode)
CS Low to Access RASIN
Low (Using Modes 4 or 5
with externally controlled
Refresh)
CS Low to Access RASIN
Low (Using Mode 5 with
Auto Refresh Mode)
CS Low to Access RASIN
Low (Using Modes 4 or 5
with externally controlled
Refresh)
CS Low to Output
High from Hi-Z
CS High to Output
Hi-Z from High
CS High to Output
Hi-Z from High
CS Low to Output
Low from Hi-Z
CS High to Output
Hi-Z from Low
10% 0 C
PRELIMINARY
Parameter
s
T
A s
L
e
70 C unless otherwise noted (Notes 2 4 5) The output load capacitance is typical for 4 banks
500 pF RAS0 –RAS3 C
Figure 3
Figure 3
Figure 7
Figure 3
Figure 3
Figure 3
Figure 11b
Figure 11b
Figure 11b
Figure 11b
Figure 11b
(See Mode 1
Description)
(See Mode 1
Description)
(See Mode 5
Description)
(See Mode 5
Description)
(See Mode 5
Description)
S1 Open
S1 Open Q WE
S1 Open RAS0-3
CAS0-3
S1 Closed
S1 Closed
Condition
L
e
24
150 pF WE C
Min
2T
12
10
50
34
34
34
5
5
5
CL
Max
L
42
50
50
e
500 pF CAS C
Min
All C
L
L
e
e
(Continued)
50 pF
600 pF RL
Max
50
95
50
e
500
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns