DP8522AV-25 National Semiconductor, DP8522AV-25 Datasheet - Page 51

• 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
Unless otherwise stated V
per bank including trace capacitance (see Note 2)
Two different loads are specified
C
C
Number
L
L
e
e
50
51
52
53
54
55
56
50 pF loads on all outputs except
150 pF loads on Q0–8 9 and 10 or
Symbol
tD1
tD2
tD3a
tD3b
tD4
tD5
tD6
CC
e
5 0V
(AREQ or AREQB Negated to RAS
Negated) Minus (CLK High to RAS
Asserted)
(CLK High to Refresh RAS Negated)
Minus (CLK High to RAS Asserted)
(ADS Asserted to RAS Asserted
(Mode 1)) Minus (AREQ Negated
to RAS Negated)
(CLK High to RAS Asserted (Mode 0))
Minus (AREQ Negated to RAS Negated)
(ECAS Asserted to CAS Asserted)
Minus (ECAS Negated to CAS Negated)
(CLK to Refresh RAS Asserted) Minus
(CLK to Refresh RAS Negated)
(AREQ Negated to RAS Negated)
Minus (ADS Asserted to RAS
Asserted ((Mode 1))
g
10% 0 C
Parameter Description
Difference
k
T
A k
70 C the output load capacitance is typical for 4 banks of 18 VRAMs
51
C
C
C
H
H
H
e
e
e
50 pF loads on all outputs except
125 pF loads on RAS0– 3 and CAS0–3 and
380 pF loads on Q0– 8 9 and 10
Min
b
7
C
L
8520A 21A 22A-25
Max
14
11
10
4
4
7
6
(Continued)
Min
b
7
C
H
Max
14
11
10
4
4
7
6