TM248CBK32F

` Organization TM124BBK32F . . . 1 048 576 * 32 TM248CBK32F . . . 2 097 152 * 32
` Single 5-V Power Supply (±10% Tolerance)
` 72-Pin Single-In-Line Memory Module (SIMM) for Use With Socket
` TM124BBK32F Utilizes Two 16-Megabit DRAMs in Plastic Small-Outline J-Lead (SOJ) Packages
` TM248CBK32F Utilizes Four 16-Megabit DRAMs in Plastic Small-Outline J-Lead (SOJ) Packages
` Long Refresh Period 16 ms (1024 Cycles)
` All Inputs, Outputs, Clocks Fully TTL Compatible
` 3-State Output
` Common CAS Control for Eight Common Data-In and Data-Out Lines in Four Blocks
` Enhanced Page-Mode Operation With
CAS-Before-RAS (CBR), RAS-Only, and Hidden Refresh
` Presence Detect
` Performance Ranges: ACCESS ACCESS ACCESS READ TIME TIME TIME OR tRAC tAA tCAC 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
` Low Power Dissipation
` Operating Free-Air Temperature Range 0°C to 70°C
` Gold-Tabbed Versions Available:† TM124BBK32F TM248CBK32F
` Tin-Lead (Solder) Tabbed Versions
Available: TM124BBK32U TM248CBK32U

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†
Supply voltage range, VCC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 V to 7 V
Voltage range on any pin (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 V to 7 V
Short-circuit output current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 mA
Power dissipation: TM124BBK32F, TM124BBK32U . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 W
TM248CBK32F, TM248CBK32U . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 W
Operating free-air temperature range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55°C to 125°C


† Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTE 1: All voltage values are with respect to VSS.

The TM248CBK32F 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, 1 048 576 × 16-bit DRAMs, each in a 42-lead plastic SOJ package mounted on a substrate with decoupling capacitors. The TM248CBK32F is described in the TM248CBK32F data sheet. The TM124BBK32F SIMM is available in the single-sided BK-leadless module for use with sockets.