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NTE21256 Datasheet, PDF (1/6 Pages) NTE Electronics – 262,144-Bit Dynamic Random Access Memory (DRAM) | |||
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NTE21256
262,144âBit Dynamic Random
Access Memory (DRAM)
Description:
The NTE21256 is a 262,144 word by 1âbit dynamic Random Access Memory. This 5Vâonly component
is fabricated with Nâchannel silicon gate technology.
Nine multiplexed address inputs permit the NTE21256 to be packaged in an industry standard
16âLead DIP package. Features of this device include single power supply with ±10% tolerance, onâ
chip address, date registers which eliminate the need for interface registers, and fully TTL compatible
inputs and outputs, including clocks.
In addition to the usual read, write, and readâmodifyâwrite cycles, the NTE21256 is capable of early
and late write cycles, RASâonly refresh, and hidden refresh. Common I/O capability is given by using
early write operation.
The NTE21256 also features page mode which allows highâspeed random access of bits in the same
row.
Features:
D 262,144 x 1âBit Organization
D Single +5V Supply, ±10% Tolerance
D Low Power Dissipation:
â385mW active (Max)
â28mW standby (Max)
D Access Time: 150ns
D Cycle Time: 260ns
D All Inputs and Outputs TTL Compatible
D OnâChip Substrate Bias Generator
D ThreeâState Data Output
D Read, Write, ReadâModifyâWrite, RASâOnlyâRefresh, Hidden Refresh
D Common I/O Capability using âEarly Writeâ Operation
D Page Mode Read and Write, ReadâWrite
D 256 Refresh Cycles with 4ms Refresh Period
Absolute Maximum Ratings: (Note 1)
Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0° to +70°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . â65° to +150°C
Voltage on any pin relative to VSS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . â1 to +7V
Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1W
Data Out Current (Short Circuit) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50mA
Note 1. Stresses above those listed under âAbsolute Maximum Ratingsâ may cause permanent
damage to the device. Exposure to absolute maximum rating conditions for extended periods
may affect device reliability.
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