DP8422AV-25 National Semiconductor, DP8422AV-25 Datasheet - Page 48

• Manufacturer Part Number: DP8422AV-25
• Description: IC CTRLR/DVR CMOS PROGRAM 84PLCC
• Manufacturer: National Semiconductor

Specifications of DP8422AV-25

• Controller Type: Dynamic RAM (DRAM)
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 84-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: *DP8422AV-25

Number
200
201
202
204
205
206
207
208
209a
209b
209c
209d
210
211
212
13 0 AC Timing Parameters
Unless otherwise stated V
per bank including trace capacitance (Note 2)
Two different loads are specified
C
C
L
L
e
e
50 pF loads on all outputs except
150 pF loads on Q0–8 9 10 and WE or
tSRFCK
tSDRFCK
tSXRFCK
tPCKRFL
tPARQRF
tPCKRFH
tPCKRFRASH
tPCKRFRASL
tPCKCL0
tPCKCL1
tPCKCL2
tPCKCL3
tWRFSH
tPCKRQL
tPCKRQH
Symbol
RFSH Asserted Setup to CLK High
DISRFSH Asserted Setup to CLK High
EXTENDRF Setup to CLK High
CLK High to RFIP Asserted
AREQ Negated to RFIP Asserted
CLK High to RFIP Negated
CLK High to Refresh RAS Negated
CLK High to Refresh RAS Asserted
CLK High to CAS Asserted
during Error Scrubbing
(t
CLK High to CAS Asserted
during Error Scrubbing
(t
CLK High to CAS Asserted
during Error Scrubbing
(t
CLK High to CAS Asserted
during Error Scrubbing
(t
RFSH Pulse Width
CLK High to RFRQ Asserted
CLK High to RFRQ Negated
CC
RAH
RAH
RAH
RAH
e
e
e
e
e
5 0V
15 ns t
15 ns t
25 ns t
25 ns t
Refresh Parameter
g
Description
10% 0 C
ASC
ASC
ASC
ASC
(Continued)
FIGURE 39 200 Refresh Timing
e
e
e
e
0 ns)
10 ns)
0 ns)
10 ns)
k
T
A k
70 C the output load capacitance is typical for 4 banks of 18 DRAMs
48
Min
C
C
C
27
28
15
15
H
H
H
e
e
e
8420A 21A 22A-20
C
L
50 pF loads on all outputs except
125 pF loads on RAS0– 3 and CAS0–3 and
380 pF loads on Q0– 8 9 10 and WE
Max
102
39
62
65
35
28
82
92
92
46
50
Min
27
28
15
15
C
H
Max
100
100
110
39
62
65
40
33
90
46
50
Min
22
22
12
15
8420A 21A 22A-25
C
L
Max
31
50
51
29
23
73
83
83
93
40
40
Min
22
22
12
15
TL F 8588 – F2
C
H
Max
100
31
50
51
33
27
80
90
90
40
40