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WED8L24257V10BC Datasheet(PDF) 1 Page - White Electronic Designs Corporation |
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WED8L24257V10BC Datasheet(HTML) 1 Page - White Electronic Designs Corporation |
1 / 6 page 1 White Electronic Designs Corporation (508) 366-5151 www.whiteedc.com July 2002 Rev. 1A ECO #15432 WED8L24257V FIG. 1 PIN NAMES BLOCK DIAGRAM PIN SYMBOLS PIN CONFIGURATION Asynchronous SRAM, 3.3V, 256Kx24 FEATURES n 256Kx24 bit CMOS Static n Random Access Memory Array Fast Access Times: 10, 12, and 15ns Master Output Enable and Write Control TTL Compatible Inputs and Outputs Fully Static, No Clocks n Surface Mount Package 119 Lead BGA (JEDEC MO-163), No. 391 Small Footprint, 14mmx22mm Multiple Ground Pins for Maximum Noise Immunity n Single +3.3V (±5%) Supply Operation n DSP Memory Solution Motorola DSP5630x Analog Devices SHARCTM DESCRIPTION The WED8L24257VxxBC is a 3.3V, twelve megabit SRAM con- structed with three 256Kx8 die mounted on a multi-layer laminate substrate. With 10 to 15ns access times, x24 width and a 3.3V operatingvoltage,theWED8L24257Visidealforcreatingasinglechip memory solution for the Motorola DSP5630x (Figure 8) or a two chip solution for the Analog Devices SHARCTM DSP (Figure 9). The single or dual chip memory solutions offer improved system performance by reducing the length of board traces and the number of board connections compared to using multiple monolithic devices. The JEDEC Standard 119 lead BGA provides a 69% space savings over using six 256Kx4, 300 mil wide SOJs and the BGA package has a maximum height of 110 mils compared to 148 mils for the SOJ packages. The BGA package also allows the use of the same manufacturingandinspectiontechniquesastheMotorolaDSP,which is also in a BGA package. A0-17 Address Inputs E Chip Enable W Master Write Enable G Master Output Enable DQ0-23 Common Data Input/Output VCC Power (3.3V ±5%) GND Ground NC No Connection 1 234 56 7 A NC AO A1A2 A3A4 NC B NC A5 A6 E A7 A8 NC C I/012 NC NC NC NC NC I/00 D I/013 VCC GND GND GND VCC I/01 E I/014 GND VCC GND VCC GND I/02 F I/015 VCC GND GND GND VCC I/03 G I/016 GND VCC GND VCC GND I/04 H I/017 VCC GND GND GND VCC I/05 J NC GND VCC GND VCC GND NC K I/018 VCC GND GND GND VCC I/06 L I/019 GND VCC GND VCC GND I/07 M I/020 VCC GND GND GND VCC I/08 N I/021 GND VCC GND VCC GND I/09 P I/022 VCC GND GND GND VCC I/010 R I/023 NC NC NC NC A17 I/011 T NC A9 A10 W A11 A12 NC UNC A13 A14 G A15 A16 NC 256K x 24 Memory Array 18 A0-A17 G W E DQ0-7 DQ8-15 DQ16-23 |
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