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1 white electronic designs corporation ? westborough, ma 01581 (508) 366-5151 www.whiteedc.com edi8l32256v
256kx32 sram features pin configurations pin description 256kx32 bit cmos static dsp memory solution adsp - 21060l (sharc) adsp - 21062l (sharc) tms320lc31 random access memory array fast access times: 12, 15, 17 and 20ns 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 surface mount package 68 lead plcc, no. 99 jedec mo-47ae small footprint, 0.990 sq. in. multiple ground pins for maximum noise immunity single 3.3v (5%) supply operation 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. 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 sharc tm dsp (figure 4). alternatively the device's chip enables can be used to con- figure it as a 512kx16. a 512kx48 program memory array for analog's sharc dsp is created using three devices (fig- ure 5). if this memory 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. the device provides a 32% space savings when compared to two monolithic 256kx16, 44 pin sojs. 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 in- formation see figure 6. note: solder reflow temperature should not exceed 260c for 10 seconds.

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march, 1998 rev. 2 eco# 10135
2 white electronic designs corporation westborough, ma 01581 (508) 366-5151 www.whiteedc.com edi8l32256v absolute maximum ratings recommended operating conditions capacitance (f=1.0mhz, vin=vcc or vss) block diagram truth table parameter sym min typ max units supply voltage vcc 3.135 3.3 3.465 v supply voltage vss 0 0 0 v input high voltage vih 2.2 - - vcc+0.3 v input low voltage vil -0.3 -- 0.8 v voltage on any pin relative to vss -0.5v to 4.6v operating temperature ta (ambient) commercial 0c to + 70c industrial -40c to +85c storage temperature -55c to +125c power dissipation 1.7 watts output current. 20 ma junction temperature, tj 175c 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 e w g bs?-3 mode output p ower h x x x standby high z icc2,icc3 l h h x output disable high z icc1 l x x h output disable high z icc1 l h l l read dout icc1 l l x l write din icc1 *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. x means don't care
3 white electronic designs corporation westborough, ma 01581 (508) 366-5151 www.whiteedc.com edi8l32256v
ac test circuit ac test conditions (note: for tehqz,tghqz and twlqz, see figure 2) input pulse levels vss to 3.0v input rise and fall times 5ns input and output timing levels 1.5v output load figure 1 parameter sym conditions min max units 12/15 17/20 ns operating power supply current icc1 w= vil, ii/o = 0ma, 480 440 ma min cycle standby (ttl) supply current icc2 e vih, vin vil or 100 100 ma vin vih, f= ? mhz full standbysupply current icc3 e vcc-0.2v 20 20 ma vin vcc-0.2v or vin 0.2v input leakage current ili vin = 0v to vcc 10 10 a output leakage current ilo v i/o = 0v to vcc 10 10 a output high volltage voh ioh = -4.0ma 2.4 v output low voltage vol iol = 8.0ma 0.4 0.4 v
4 white electronic designs corporation westborough, ma 01581 (508) 366-5151 www.whiteedc.com edi8l32256v ac characteristics - read cycle read cycle 2 - w high read cycle 1 - w high, g, e low symbol 12ns 15ns 17ns 20ns parameter jedec alt. min max min max min max min max units read cycle time tavav trc 12 15 17 20 ns address access time tavqv taa 12 15 17 20 ns chip enable access time telqv tacs 12 15 17 20 ns byte select access time tblqx tblz 12 15 17 20 ns chip enable to output in low z (1) telqx tclz 3 3 3 3 ns byte select to output in low z tblqx tblz 3 3 3 3 ns chip disable to output in high z (1) tehqz tchz 7 8 8 10 ns byte select to output in high z tbhqz tbhz 7 8 8 10 ns output hold from address change tavqx toh 3 3 3 3 ns output enable to output valid tglqv toe 5 6 8 10 ns output enable to output in low z (1) tglqx tolz 2 2 2 2 ns output disable to output in high z(1) tghqz tohz 4568ns
5 white electronic designs corporation westborough, ma 01581 (508) 366-5151 www.whiteedc.com edi8l32256v
symbol 12ns 15ns 17ns 20ns parameter jedec alt. min max min max min max min max units write cycle time tavav twc 12 15 17 20 ns chip enable to end of write telwh tcw 8 12 10 15 ns teleh tcw 8 12 10 15 ns byte select to end of write tblwh tbw 8 12 10 15 ns address setup time tavwl tas 0000ns taveltas0000ns address valid to end of write tavwh taw 9 12 12 15 ns taveh taw 9 12 12 15 ns write pulse width twlwh twp 9 12 12 15 ns twleh twp 9 12 12 15 ns write recovery time twhax twr 0000ns tehax twr 0000ns data hold time twhdx tdh 0000ns tehdx tdh 0000ns write to output in high z (1) twlqz twhz 0 5 0 6 0 7 0 7 ns data to write time tdvwh tdw 5 8 8 10 ns tdveh tdw 5 8 8 10 ns output active from end of write (1) twhqx twlz 2222ns note 1: parameter guaranteed, but not tested. write cycle 1 - w controlled
6 white electronic designs corporation westborough, ma 01581 (508) 366-5151 www.whiteedc.com edi8l32256v write cycle 2 - e controlled
7 white electronic designs corporation westborough, ma 01581 (508) 366-5151 www.whiteedc.com edi8l32256v
package description ordering information weight = 4.2g theta j a = 40 c/w theta j c = 15 c/w part number speed p ackage (ns) no. edi8l32256v12ac 12 99 EDI8L32256V15AC 15 99 edi8l32256v17ac 17 99 edi8l32256v20ac 20 99 commercial (0c to 70c) industrial (-40c to +85c) part number speed p ackage (ns) no. edi8l32256v15ai 15 99 edi8l32256v17ai 17 99 edi8l32256v20ai 20 99 package no. 99 68 lead plcc jedec mo-47ae
8 white electronic designs corporation westborough, ma 01581 (508) 366-5151 www.whiteedc.com edi8l32256v ti tms320c30/31 edi8l3265/256c primary address bus a23 - a0 e0\ e1\ bs0\ bs1\ bs2\ bs3\ w\ g\ strb\ r/w\ primary databus d31 - d0 a17 a16 a15 a14 a13 a12 a3 a2 a1 a0 dq31 dq30 dq29 dq28 dq27 dq4 dq3 dq2 dq1 dq0 a d d r e s s b u s d a t a b u s e0\ and e1\ may be tied to gnd o r co nnec ted to strb \. tying e0\ and e1\ to gnd will prevent device from entering standby mode. } 256kx 32 only figure 3 - interfacing the texas instruments tms320lc31 with the edi8l32256v (256k x 32) edi8l32256v texas instruments tms320lc31 figure 4 - interfacing the analog sharc dsp w/ the edi8l32256v (256k x 32 array) analog devices adsp-2106xl a31 - a0 d47 - d0 ms0\ ms1\ wr\ rd\ edi8l32256v e0\ e1\ bs0\ bs1\ bs2\ bs3\ w\ g\ (configured as 256kx32) dq0 - dq31 a0 - a17
9 white electronic designs corporation westborough, ma 01581 (508) 366-5151 www.whiteedc.com edi8l32256v figure 5 - interfacing the analog sharc dsp w/ the edi8l32256v (512k x 48 array) analog devices adsp-2106xl address bus a31 - a0 wr\ databus d47 - d0 ms0\ ms1\ rd\ edi8l32256v e0\ bs0\ bs1\ e1\ bs2\ bs3\ w\ g\ dq31 dq16 dq15 dq0 d a t a b u s dq15 dq0 a17 - a0 (configured as 512kx16) word1 edi8l32256v e0\ bs0\ bs1\ e1\ bs2\ bs3\ w\ g\ dq31 dq16 dq15 dq0 d a t a b u s dq31 dq16 a17 - a0 (configured as 512kx16) word2 edi8l32256v e0\ bs0\ bs1\ e1\ bs2\ bs3\ w\ g\ dq31 dq16 dq15 dq0 d a t a b u s dq47 dq32 a17 - a0 (configured as 512kx16) word3
10 white electronic designs corporation westborough, ma 01581 (508) 366-5151 www.whiteedc.com edi8l32256v figure 6

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