DP8522AV-25 National Semiconductor, DP8522AV-25 Datasheet - Page 49

• Manufacturer Part Number: DP8522AV-25
• Description: IC CTRLR 4M VRAM 25MHZ 68PLCC
• Manufacturer: National Semiconductor

Specifications of DP8522AV-25

• Controller Type: Video RAM Controller, Drivers
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 68-LCC (J-Lead)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Current - Supply: -
• Voltage - Supply: -
• Interface: -
• Other names: *DP8522AV-25

15 0 AC Timing Parameters DP8520A DP8521A DP8522A
Number
1
2
3 4
5
6
7 8
9a
9b
9c
9d
10a
10b
11a
11b
12
13
14
15
16
17
18
19
20
fCLK
tCLKP
tCLKPW
fDCLK
tDCLKP
tDCLKPW
tPRASCAS0
tPRASCAS1
tPRASCAS2
tPRASCAS3
tRAH
tRAH
tASC
tASC
tPCKRAS
tPARQRAS
tPENCL
tPENCH
tPARQCAS
tPCLKWH
tPCLKDL0
tPEWL
tSECK
Symbol
CLK Frequency
CLK Period
CLK Pulse Width
DELCLK Frequency
DELCLK Period
DELCLK Pulse Width
RAS Asserted to CAS Asserted
(tRAH
RAS Asserted to CAS Asserted
(tRAH
(RAS Asserted to CAS Asserted
(tRAH
(RAS Asserted to CAS Asserted
(tRAH
Row Address Hold Time (tRAH
Row Address Hold Time (tRAH
Column Address Setup Time (tASC
Column Address Setup Time (tASC
CLK High to RAS Asserted
following Precharge
AREQ Negated to RAS Negated
ECAS0–1 Asserted to CAS Asserted
ECAS0–1 Negated to CAS Negated
AREQ Negated to CAS Negated
CLK to WAIT Negated
CLK to DTACK Asserted
(Programmed as DTACK of 1 2 1 1
or if WAITIN is Asserted)
ECAS Negated to WAIT Asserted
during a Burst Access
ECAS Asserted Setup to CLK High to
Recognize the Rising Edge of CLK
during a Burst Access
e
e
e
e
15 ns tASC
15 ns tASC
25 ns tASC
25 ns tASC
Common Parameter
Description
e
e
e
e
0 ns)
10 ns)
0 ns)
10 ns)
49
e
e
15)
25)
e
e
0)
10)
Min
40
12
50
12
30
40
40
50
15
25
10
19
0
5
0
C
L
8520A 21A 22A-25
Max
200
(Continued)
25
20
22
31
20
20
47
31
28
36
Min
40
12
50
12
30
40
40
50
15
25
10
19
0
5
0
C
H
Max
200
25
20
26
35
27
27
54
31
28
36