DP8419N-70 National Semiconductor, DP8419N-70 Datasheet - Page 9
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DP8419N-70
Manufacturer Part Number
DP8419N-70
Description
IC CTRLR 256K DRAM 48-DIP
Manufacturer
National Semiconductor
Datasheet
1.DP8419N-70.pdf
(28 pages)
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
DP8419 Mode Descriptions
8 Bits of Refresh Counter Used
All 9 Bits of Refresh Counter Used
Only LS 7 Bits of Refresh Counter used for the 7 Row Addresses
MSB not used but can toggle
FIGURE 1b DP8419 with 128 Row x 512 Column 64k DRAM
FIGURE 1c DP8419 with 256 Row x 256 Column 64k DRAM
DP8419 Interface Between System
FIGURE 1a DP8419 with any 16k DRAMS
FIGURE 1d DP8419 with 256k DRAMs
(Continued)
9
DRAM Banks
TL F 8396– 8
TL F 8396 – 5
TL F 8396 – 7
TL F 8396 – 6