DP8419N-70 National Semiconductor, DP8419N-70 Datasheet - Page 9

• 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

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