Am91L11
Am91L11 is 256 x 4 Static R/W RAM manufactured by AMD.
DESCRIPTION
The Am9111/Am91 L11 series of devices are high performance, low power, 1024-bit, static, read/write random access memories. They offer a wide range of access times including versions as fast as 200ns. Each memory is implemented as 256 words by 4 bits per word. This organization permits efficient design of small memory systems and allows finer resolution of incremental memory depth. The input data and output data signals are bussed together to share mon I/O pins. This feature not only decreases the package size, but helps eliminate external logic in bus-oriented memory systems.
These memories may be operated in a DC standby mode for reductions of as much as 84% of the normal power dissipation. Data can be retained with a power supply as low as 1.5 volts. The low power Am91 L11 series offer reduced power dissipation during normal operating conditions and even lower dissipation in the standby mode.
The Chip Enable input control signals act as high order address lines and they control the write amplifier and the output buffers. The Output Disable signal provides independent control over the output state of enabled chips.
These devices are all fully static and no refresh operations or sense amplifiers or clocks are required. Input and output signal levels are identical to TTL specifications, providing simplified interfacing and high noise immunity. The outputs- will drive two full TTL loads for increased fan-out and better bus interfacing capability.
Am9111 BLOCK DIAGRAM
CONNECTION DIAGRAM Top View
32X8 STORAGE
ARRAY
32X8 STORAGE
ARRAY
32X8 STORAGE
ARRAY
32X8 STORAGE
ARRAY
A5--------------~
GEl
A6--------------~ m
A7--------------~
~-r----~----~-----.~~
ADDRESS 3 ADDRESS 2 ADDRESS' ADDRESS 0 ADDRESS 5 ADDRESS r; ADDRESS 7
(GND) VSS OUTPUT DISABLE vce (+5 V)
ADDRESS 4 WRITE ENABLE ~ DATil 1/04 DATA 1/03 DATA 1/02 DATA I/O, CHIP ENABLE 2
MOS-350
Note: Flat Pack version available in 24-pin package.
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