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MSM548262

Features: • Single power supply: 5 V ±10%• Full TTL compatibility• Multiport organization RAM : 256K word × 8 bits SAM : 512 word × 8 bits• Fast page mode• Write per bit• Masked flash write• Masked block write•RAS only refresh•CAS beforeRAS ref...

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SeekIC No. : 004428878 Detail

MSM548262: Features: • Single power supply: 5 V ±10%• Full TTL compatibility• Multiport organization RAM : 256K word × 8 bits SAM : 512 word × 8 bits• Fast page mode• Write per bi...

MSM548262 Data Sheet

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Part Number:
MSM548262
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: 2024/11/26

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Product Details

Description



Features:

• Single power supply: 5 V ±10%
• Full TTL compatibility
• Multiport organization
   RAM : 256K word × 8 bits
   SAM : 512 word × 8 bits
• Fast page mode
• Write per bit
• Masked flash write
• Masked block write
• RAS only refresh
• CAS before RAS refresh
• Hidden refresh
• Serial read/write
• 512 tap location
• Bidirectional data transfer
• Split transfer
• Masked write transfer
• Refresh: 512 cycles/8 ms
• Package options:
  40-pin 400 mil plastic SOJ                       (SOJ40-P-400-1.27)             (Product : MSM548262-xxJS)
  44/40-pin 400 mil plastic TSOP (Type II)(TSOPII44/40-P-400-0.80-K)(Product : MSM548262-xxTS-K)
   xx indicates speed rank.


Pinout

Connection Diagram


Specifications

Parameter
Symbol
Condition
Rating
Unit
Input Output Voltage
VT
Ta = 25°C
1.0 to 7.0
V
Output Current
IOS
Ta = 25°C
50
mA
Power Dissipation
PD
Ta = 25°C
1
W
Operating Temperature
Topr
-
0 to 70
°C
Storage Temperature
Tstg
-
55 to 150
°C



Description

The MSM548262 is a 2-Mbit CMOS multiport DRAM composed of a 262,144-word by 8-bit dynamic RAM, and a 512-word by 8-bit SAM. Its RAM and SAM operate independently and asynchronously.

MSM548262 supports three types of operations: random access to RAM port, high speed serial access to SAM port, and bidirectional transfer of data between any selected row in the RAM port and the SAM port. In addition to the conventional multiport DRAM operating modes, the MSM548262 features block write, flash write functions on the RAM port and a split data transfer capability on the SAM port. The SAM port requires no refresh operation because it uses static CMOS flipflops




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