TM124GU8A

• Organization . . . 1 048 576 × 8
• Single 5-V Power Supply (±10% Tolerance)
• 30-Pin Single In-Line Memory Module (SIMM)
• TM124GU8A Utilizes Two 4-Megabit Dynamic RAMs in Plastic Small-Outline J-Lead Packages (SOJs)
• Long Refresh Period . . . 16 ms (1024 Cycles)
• All Inputs, Outputs, Clocks Fully TTL Compatible
• 3-State Outputs
• Performance Ranges: ACCESS ACCESS READ TIME TIME OR (tRAC) (tAA) WRITE CYCLE (MAX) (MAX) (MIN) TM124GU8A-60 60 ns 30 ns 110 ns TM124GU8A-70 70 ns 35 ns 130 ns TM124GU8A-80 80 ns 40 ns 150 ns
• Low Power Dissipation
• Operating Free-Air Temperature Range 0°C to 70°C

Supply voltage range on any pin (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 V to 7 V
Voltage range on VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 V to 7 V
Short circuit output current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 mA
Power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 W
Operating free-air temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55°C to 125°C


† Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. This is a stress rating only, and functional operation of the device at these or any other conditions beyond those indicated in the "recommended operating conditions" section of this specification 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 TM124GU8A is a dynamic random-access memory module organized as 1 048 576 × 8 in a 30-pin leadless single in-line memory module (SIMM).

The TM124GU8A is composed of two TMS44400, 1 048 576 × 4 bit dynamic RAMs in 20/26-lead plastic small-outline J-lead packages (SOJs).

The TM124GU8A is mounted on a substrate with decoupling capacitors. The onboard capacitors eliminate the need for bypassing on the motherboard and offer superior performance over equivalent leaded capacitors due to reduced lead inductance. With the elimination of bypass capacitors on the motherboard, reduced PC  board size, and fewer plated through-holes, a cost savings can be realized.

The TM124GU8A features RAS access times of 60 ns, 70 ns, and 80 ns. All inputs and outputs, including clocks, are compatible with Series 74 TTL. All address lines and data in are latched on-chip to simplify system design. Data out is unlatched to allow greater system flexibility.

The TM124GU8A is characterized for operation from 0°C to 70°C.