TM497MBK36A

The TM497MBK36A is a type of 16M-byte dynamic random-access memory, which is organized as four times 4194304 * 9 (bit 9 is generally used for parity) in a 72-pin leadless single-in-line memory module (SIMM). The SIMM is consiste d of eight TMS417400DJ, 4194304 * 4-bit DRAMs, each in 24/26-lead plastic SOJ packages, and four TMS44100DJ, 4 194304 * 1-bit DRAMs, each in 20/26-lead plastic SOJ packages mounted on a substrate with decoupling capacitors. Each TMS417400DJ and TMS44100DJ is described in the TMS417400 and TMS44100 data sheets (respectively).

Features of TM497MBK36A are: (1)single 5-v power supply (±0% tolerance); (2)72-pin single-in-line memory module(SIMM) for use with sockets; (3)utilizes eight 16-megabit DRAMs in plastic,small-outline j-lead (SOJ) packages and four 4-megabit drams inplastic small-outline j-lead (SOJ) packages; (4)long refresh period: 32 ms (2048 cycles); (5)all inputs, outputs, clocks fully TTL compatible; (6)common cas control for nine common data-in and data-out lines in four blocks; (7)separate RAS control for eighteen data-in and data-out lines in two blocks; (8)3-state output.

The absolute maximum ratings of the TM497MBK36A can be summarized as: (1)supply voltage range:1V to 7V; (2)voltage range on any pin:1V to 7V; (3)short-circuit output current: 50 mA; (4)power dissipation: 12W; (5)operating free-air temperature range:0°C to 70°C; (6)storage temperature range:55°C to 125°C.