EDI8L32256V T NO 256Kx32 SRAM FEATURES n 256Kx32 bit CMOS Static The EDI8L32256V is a high speed, 3.3 volt, 8 megabit SRAM. The device is available with access times of 12, 15, 17 and 20ns, allowing the creation of a no wait state DSP memory solution. n DSP Memory Solution D DE EN M M CO RE • ADSP - 21060L (SHARC) • ADSP - 21062L (SHARC) The device can be configured as a 256Kx32 and used to create a single chip external data memory solution for Texas Instruments' TMS320LC31 (figure 3), or Analog Device's SHARCTM DSP (figure 4). • TMS320LC31 n Random Access Memory Array • Fast Access Times: 12, 15, 17 and 20ns Alternatively the device's chip enables can be used to configure it as a 512Kx16. A 512Kx48 program memory array for Analog's SHARC DSP is created using three devices (figure 5). If this memor y is too deep, two 256Kx24s (EDI8L24256V) can be used to create a 256Kx48 array or two 128Kx24s (EDI8L24128V) can be used to create a 128Kx48 array. • Individual Byte Enables • User Configurable Organization with Minimal Additional Logic • Master Output Enable and Write Control • TTL Compatible Inputs and Outputs • Fully Static, No Clocks The device provides a 32% space savings when compared to two monolithic 256Kx16, 44 pin SOJs. n Surface Mount Package The device provides a memory upgrade of the EDI8L32128V (128Kx32). For more memory the device can be upgraded to the EDI8L32512V (512Kx32). For additional upgrade information see figure 6. • 68 Lead PLCC, No. 99 JEDEC MO-47AE • Small Footprint, 0.990 Sq. In. • Multiple Ground Pins for Maximum Noise Immunity R FO n Single 3.3V (±5%) Supply Operation NOTE: Solder Reflow temperature should not exceed 260°C for 10 seconds. PIN CONFIGURATIONS PIN DESCRIPTION Address Inputs Chip Enables (One per Word) Byte Selects (One per Byte) Master Write Enable Master Output Enable Common Data Input/Output Power (3.3V±5%) Ground No Connection W NE AØ-A17 EØ-E1 BSØ-BS3 W G DQØ-DQ31 VCC VSS NC GN SI DE March, 1998 Rev. 2 ECO# 10135 1 White Electronic Designs Corporation • Westborough, MA 01581 • (508) 366-5151 www.whiteedc.com EDI8L32256V BLOCK DIAGRAM ABSOLUTE MAXIMUM RATINGS RECOMMENDED OPERATING CONDITIONS Parameter Sym Min Typ Max Units Supply Voltage VCC 3.135 3.3 3.465 V 0°C to + 70°C Supply Voltage VSS 0 0 0 V Industrial -40°C to +85°C Input High Voltage VIH 2.2 -- VCC+0.3 V Storage Temperature -55°C to +125°C Input Low Voltage VIL -0.3 -- 0.8 V Power Dissipation 1.7 Watts Output Current. 20 mA Junction Temperature, TJ 175°C Voltage on any pin relative to VSS -0.5V to 4.6V Operating Temperature TA (Ambient) Commercial CAPACITANCE (F=1.0MHZ, VIN=VCC OR VSS) *Stress greater than 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 greater than those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. TRUTH TABLE E H W X G X BSØ-3 X Mode Standby Output High Z Power ICC2,ICC3 L H H X Output Disable High Z L X X H Output Disable High Z ICC1 L H L L Read DOUT ICC1 L L X L Write DIN ICC1 ICC1 X Means Don't Care White Electronic Designs Corporation • Westborough, MA 01581 • (508) 366-5151 www.whiteedc.com 2 Parameter Sym Max Unit Address Lines CA 20 pF Data Lines CD/Q 10 pF Write & Output Enable Lines W, G 6 pF Chip Enable Lines/Byte Select E, BS 9 pF EDI8L32256V DC ELECTRICAL CHARACTERISTICS Parameter Sym Conditions Operating Power Supply Current ICC1 Standby (TTL) Supply Current ICC2 Full StandbySupply Current ICC3 Input Leakage Current Output Leakage Current Output High Volltage Output Low Voltage ILI ILO VOH VOL W= VIL, II/O = 0mA, Min Cycle E ³ VIH, VIN £ VIL or VIN ³ VIH, f=ØMHz E ³ VCC-0.2V VIN ³ VCC-0.2V or VIN £ 0.2V VIN = 0V to VCC V I/O = 0V to VCC IOH = -4.0mA IOL = 8.0mA AC TEST CIRCUIT Min Max 12/15 17/20 480 440 Units ns mA 100 100 mA 20 20 mA ±10 ±10 ±10 ±10 0.4 0.4 µA µA V V 2.4 AC TEST CONDITIONS Input Pulse Levels Input Rise and Fall Times Input and Output Timing Levels Output Load VSS to 3.0V 5ns 1.5V Figure 1 (note: For TEHQZ,TGHQZ and TWLQZ, see figure 2) 3 White Electronic Designs Corporation • Westborough, MA 01581 • (508) 366-5151 www.whiteedc.com EDI8L32256V AC CHARACTERISTICS - READ CYCLE Symbol Parameter Read Cycle Time Address Access Time Chip Enable Access Time Byte Select Access Time Chip Enable to Output in Low Z (1) Byte Select to Output in Low Z Chip Disable to Output in High Z (1) Byte Select to Output in High Z Output Hold from Address Change Output Enable to Output Valid Output Enable to Output in Low Z (1) Output Disable to Output in High Z(1) 12ns JEDEC Alt. Min TAVAV TAVQV TELQV TBLQX TELQX TBLQX TEHQZ TBHQZ TAVQX TGLQV TGLQX TGHQZ TRC TAA TACS TBLZ TCLZ TBLZ TCHZ TBHZ TOH TOE TOLZ TOHZ 12 17ns Max 15 3 3 15 15 15 7 7 3 4 3 3 3 10 10 3 8 2 5 Max 20 20 20 8 8 6 2 Min 20 3 3 3 4 20ns Max 17 17 17 8 8 5 2 Min 17 3 3 - W HIGH White Electronic Designs Corporation • Westborough, MA 01581 • (508) 366-5151 www.whiteedc.com Min 12 12 12 READ CYCLE 1 - W HIGH, G, E LOW READ CYCLE 2 15ns Max 10 2 6 8 Units ns ns ns ns ns ns ns ns ns ns ns ns EDI8L32256V AC CHARACTERTISTICS - WRITE CYCLE Parameter Write Cycle Time Chip Enable to End of Write Byte Select to End of Write Address Setup Time Address Valid to End of Write Write Pulse Width Write Recovery Time Data Hold Time Write to Output in High Z (1) Data to Write Time Output Active from End of Write (1) Symbol JEDEC Alt. TAVAV TWC TELWH TCW TELEH TCW TBLWH TBW TAVWL TAS TAVEL TAS TAVWH TAW TAVEH TAW TWLWH TWP TWLEH TWP TWHAX TWR TEHAX TWR TWHDX TDH TEHDX TDH TWLQZ TWHZ TDVWH TDW TDVEH TDW TWHQX TWLZ 12ns Min Max 12 8 8 8 0 0 9 9 9 9 0 0 0 0 0 5 5 5 2 15ns Min Max 15 12 12 12 0 0 12 12 12 12 0 0 0 0 0 6 8 8 2 17ns Min Max 17 10 10 10 0 0 12 12 12 12 0 0 0 0 0 7 8 8 2 20ns Min Max Units 20 ns 15 ns 15 ns 15 ns 0 ns 0 ns 15 ns 15 ns 15 ns 15 ns 0 ns 0 ns 0 ns 0 ns 0 7 ns 10 ns 10 ns 2 ns Note 1: Parameter guaranteed, but not tested. Write Cycle 1 - W Controlled 5 White Electronic Designs Corporation • Westborough, MA 01581 • (508) 366-5151 www.whiteedc.com EDI8L32256V WRITE CYCLE 2 - E CONTROLLED White Electronic Designs Corporation • Westborough, MA 01581 • (508) 366-5151 www.whiteedc.com 6 EDI8L32256V T NO PACKAGE DESCRIPTION D DE EN M M CO RE Package No. 99 68 Lead PLCC JEDEC MO-47AE Weight = 4.2g Theta JA = 40°C/W Theta Jc = 15°C/W ORDERING INFORMATION R FO INDUSTRIAL (-40°C TO +85°C) COMMERCIAL (0°C TO 70°C) Part Number Package No. 99 99 99 99 Part Number EDI8L32256V15AI EDI8L32256V17AI EDI8L32256V20AI Speed (ns) 15 17 20 W NE EDI8L32256V12AC EDI8L32256V15AC EDI8L32256V17AC EDI8L32256V20AC Speed (ns) 12 15 17 20 Package No. 99 99 99 GN SI DE 7 White Electronic Designs Corporation • Westborough, MA 01581 • (508) 366-5151 www.whiteedc.com EDI8L32256V Figure 3 - Interfacing the Texas Instruments TMS320LC31 with the EDI8L32256V (256K x 32) EDI8L3265/256C EDI8L32256V Primary Address Bus A23 - A0 A 17 A 16 A 15 A 14 A 13 A 12 Instruments TITexas TMS320C30/31 } TMS320LC31 A D D R E S S B U S A3 A2 A1 A0 E0\ and E1\ may be tied to GND or connected to STRB\. Tying E0\ and E1\ to GND will prevent device fr om entering standby mode. 256Kx 32 only E0\ E1\ D A T A B U S DQ 31 DQ 30 DQ 29 DQ 28 DQ 27 DQ4 DQ3 DQ2 DQ1 DQ0 BS0\ BS1\ BS2\ BS3\ STRB\ R/W\ W\ Primary Databus D31 - D0 G\ Figure 4 - Interfacing the Analog SHARC DSP w/ the EDI8L32256V (256K x 32 Array) A31 - A0 A0 - A17 Analog Devices ADSP-2106xL E0\ E1\ BS0\ BS1\ BS2\ BS3\ W\ G\ MS0\ MS1\ WR\ RD\ EDI8L32256V (Configured as 256Kx32) DQ0 - DQ31 D47 - D0 White Electronic Designs Corporation • Westborough, MA 01581 • (508) 366-5151 www.whiteedc.com 8 EDI8L32256V Figure 5 - Interfacing the Analog SHARC DSP w/ the EDI8L32256V (512K x 48 Array) EDI8L32256V Address Bus A31 - A0 (Configured as 512Kx16) A17 - A0 E0\ BS0\ BS1\ E1\ BS2\ BS3\ MS0\ MS1\ Analog Devices ADSP-2106xL W\ G\ WR\ RD\ DQ31 D A T A B U S EDI8L32256V (Configured as 512Kx16) A17 - A0 E0\ BS0\ BS1\ E1\ BS2\ BS3\ W\ G\ (Configured as 512Kx16) A17 - A0 E0\ BS0\ BS1\ E1\ BS2\ BS3\ W\ G\ 9 Word1 DQ0 DQ0 DQ31 D A T A B U S EDI8L32256V Databus D47 - D0 DQ15 DQ16 DQ15 DQ31 DQ16 DQ15 Word2 DQ16 DQ0 DQ31 D A T A B U S DQ47 DQ16 DQ15 Word3 DQ32 DQ0 White Electronic Designs Corporation • Westborough, MA 01581 • (508) 366-5151 www.whiteedc.com EDI8L32256V FIGURE 6 White Electronic Designs Corporation • Westborough, MA 01581 • (508) 366-5151 www.whiteedc.com 10