Texas Instruments TMS427409A
The TMS41x409A and TMS42x409A series are 16 777 216-bit dynamic random-access memory (DRAM) devices organized as 4 194 304 words of four bits each. These devices feature maximum RAS access times of 50, 60, and 70 ns. The TMS426409A and TMS427409A are offered in a 24/26-lead plastic surface-mount SOJ package (DJ suffix) and a 24 / 26-lead plastic surface-mount TSOP (DGA suffix).TMS416409A, TMS417409A, TMS426409A, TMS427409A 4194304 BY 4-BIT EXTENDED DATA OUT DYNAMIC RANDOM-ACCESS MEMORIES SMKS893B – AUGUST 1996 – REVISED APRIL 1997 This data sheet is applicable to all TMS41x409As and TMS42x409As symbolized by Revision “B”, Revision “E”, and subsequent revisions as described in the device symbolization section. D Organization . . . 4 194304 × 4 D Single Power Supply (5 V or 3.3 V) D Performance Ranges: ’41x409A-50 ’41x409A-60 ACCESS ACCESS ACCESS TIME TIME TIME tRAC MAX tCAC MAX tAA MAX 50 ns 13 ns 25 ns 60 ns 15 ns 30 ns EDO CYCLE tHPC MIN 20 ns 25 ns ’41x409A-70 ’42x409A-50 70 ns 50 ns 18 ns 13 ns 35 ns 25 ns 30 ns 20 ns ’42x409A-60 60 ns 15 ns 30 ns 25 ns ’42x409A-70 70 ns 18 ns 35 ns 30 ns D Extended-Data-Out (EDO) Operation D CAS-Before-RAS ( CBR) Refresh D Low Power Dissipation D 3-State Unlatched Output D High-Reliability Plastic 24 / 26-Lead 300-Mil-Wide Surface-Mount Small-Outline J-Lead (SOJ) Package (DJ Suffix) and 24/26-Lead 300-Mil-Wide Surface-Mo...