1 048 576 x 32 位动态 RAM 模块
The TM124BBK32F is a 32-megabit dynamic random-access memory DRAM organized as four times
1048576 × 8 in a 72-pin SIMM. The SIMM is composed of two TMS418160DZ, 1048576 × 16-bit DRAMs, each in a 42-lead plastic SOJ package mounted on a substrate with decoupling capacitors. The TMS418160DZ is described in the TMS418160 data sheet. The TM124BBK32F SIMM is available in the single-sided BK-leadless module for use with sockets.
### TM248CBK32F
The TM248CBK32F is a 64-megabit DRAM organized as four times 2097152×8 in a 72-pin SIMM. The SIMM is composed of four TMS418160DZ, 1048576 × 16-bit DRAMs, each in a 42-lead plastic SOJ package mounted on a substrate with decoupling capacitors. The TMS418160DZ is described in the TMS418160 data sheet. The TM248CBK32F SIMM is available in the double-sided BK-leadless module for use with sockets.
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Organization
TM124BBK32F...1048576 × 32
TM248CBK32F...2097152 × 32
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Single 5-V Power Supply ±10% Tolerance
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72-Pin Single-In-Line Memory Module SIMM for Use With Socket
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TM124BBK32F - Utilizes Two 16-Megabit DRAMs in Plastic Small-Outline J-Lead SOJ Packages
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TM248CBK32F - Utilizes Four 16-Megabit DRAMs in Plastic Small-Outline J-Lead SOJ Packages
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Long Refresh Period
16 ms 1024 Cycles
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All Inputs, Outputs, Clocks Fully TTL Compatible
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3-State Output
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Common **CAS**\ Control for Eight Common Data-In and Data-Out Lines in Four Blocks
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Enhanced Page-Mode Operation With
**CAS**\\-Before- **RAS**\ CBR, **RAS**\\-Only, and Hidden Refresh
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Presence Detect
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Performance Ranges: ACCESS ACCESS ACCESS READ
ME TIME TIME OR t**RAC** t**AA** t**CAC** WRITE CYCLE MAX MAX MAX MIN"124BBK32F-60 60 ns 30 ns 15 ns 110 ns"124BBK32F-70 70 ns 35 ns 18 ns 130 ns"124BBK32F-80 80 ns 40 ns 20 ns 150 ns"248CBK32F-60 60 ns 30 ns 15 ns 110 ns"248CBK32F-70 70 ns 35 ns 18 ns 130 ns"248CBK32F-80 80 ns 40 ns 20 ns 150 ns
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Low Power Dissipation
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Operating Free-Air Temperature Range
0°C to 70°C
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Gold-Tabbed Versions Available:****
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TM124BBK32F
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TM248CBK32F
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Tin-Lead Solder Tabbed Versions Available:
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TM124BBK32U
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TM248CBK32U