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MA31751

Features: • MlL-STD-1750A/B Compatible•Radiation Hard CMOS/SOS Technology•User Configurable as Either a Memory Management Unit (MMU) or a Block Protect Unit (BPU) or Both•Memory Management Unit Configuration• 1 MWord Physical Address Space• Access Lock and Key o...

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SeekIC No. : 004407679 Detail

MA31751: Features: • MlL-STD-1750A/B Compatible•Radiation Hard CMOS/SOS Technology•User Configurable as Either a Memory Management Unit (MMU) or a Block Protect Unit (BPU) or Both•Mem...

MA31751 Data Sheet

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Part Number:
MA31751
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/11/27

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Product Details

Description



Features:

• MlL-STD-1750A/B Compatible
•Radiation Hard CMOS/SOS Technology
•User Configurable as Either a Memory Management Unit (MMU) or a Block Protect Unit (BPU) or Both
•Memory Management Unit Configuration
• 1 MWord Physical Address Space
• Access Lock and Key of 4K-Word Blocks
• Write/Execute Protection of 4K-Word Blocks
•Block Protect Unit Configuration
• Protection of 1K-Word Blocks
• Global Memory Write Protection During Initialisation
•Direct Memory Access Support




Specifications

Parameter
Min
Max
Unit
Supply Voltage
-0.5
7
V
Input Voltage
-0.3
VDD+0.3
V
Current Through Any Pin
-20
+20
mA
Operating Temperature
-55
125
°C
Storage Temperature
-65
150
°C
Note: Stresses above those listed may cause permanent damage to the device.
This is a stress rating only and functional operation of the device at these condi
tions, or at any other condition above those indicated in the operations section
of this specification, is not implied. Exposure to absolute maximum rating conditi
ons for extended periods may affect device reliability.




Description

The MA31751 Memory Management Unit/Block Protect Unit (MMU/BPU) is an optional chip which may be used to expand the capabilities of the MA31750.

User configurable, the MA31751 can perform as an MMU, a BPU or both MMU and BPU, conforming to MIL-STD-1750A and 1750B. MMU mapping and BPU protection for 1M words of memory is provided by the internal memory. Up to 16 MA31751 devices can be used to give 16M words of logical mapped onto 8M words of physical address space with protection in 1750B mode.

The MA31751 is designed to have a simple interface to both the CPU and the system bus with the minimal number of control lines. This reduces board space and simplifies system design.

The MA31751 traps the MMU and BPU XIO commands to program and read the logical to physical mapping and memory access control. This provides simple memory management as defined by the MIL-STD-1750.






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