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re v: 1.02 9/2001 1/11 ? 1999, giga semiconductor, inc. for latest documentation see http://www.gsitechnology.com. gs781 16 b 512k x 16 8mb asynchronous sram 10, 12, 15 ns 3.3 v v dd bga commercial temp industrial temp features ? fast access time: 10, 12, 15 ns ? cmos low power operation: 300/250/220/180 ma at minimum cycle time ? single 3.3 v 0.3 v power supply ? all inputs and outputs are ttl-compatible ? fully static operation ? industrial temperature option: ?40 to 85c ? 14 mm x 22 mm, 119-bump, 1.27 mm pitch ball grid array package description the gs781 16 is a high speed cmos static ram organized as 524,288 -words by 16 -bits. static design eliminates the need for external clocks or timing strobes. the gs78116 operates on a single 3.3 v power supply and all inputs and outputs are ttl- compatible. the gs 781 16 is available in 14 mm x 22 mm bga package. pin descriptions symbol description a 0 to a 18 address input dq 1 to dq 16 data input/output ce chip enable input we write enable input oe output enable input v dd +3.3 v power supply v ss ground nc no connect memory array row decoder column decoder address input buffer control i/o buffer a 0 ce we oe dq 1 a 18 block diagram dq 16
rev: 1.02 9/2001 2/11 ? 1999, giga semiconductor, inc. for latest documentation see http://www.gsitechnology.com. gs781 16 b 512k x 16 async sram in 119-bump, 14 mm x 22 mm note: bumps 1b, 7t, 3c, and 5c are actually nc?s but should be wired 3c = v dd and 1b, 7t and 5c = v ss to assure compatibility with future versions. top view 1 2 3 4 5 6 7 a nc a 15 a 14 a 16 a 13 a 12 nc b nc, v ss a 11 a 10 ce a 9 a 8 nc c nc nc v dd , nc a 17 v ss , nc nc nc d nc v dd v ss v ss v ss v dd nc e dq 1 nc v dd v ss v dd nc dq 16 f dq 2 v dd v ss v ss v ss v dd dq 15 g dq 3 nc v dd v ss v dd nc dq 14 h dq 4 v dd v ss v ss v ss v dd dq 13 j v dd v ss v dd v ss v dd v ss v dd k dq 5 v dd v ss v ss v ss v dd dq 12 l dq 6 nc v dd v ss v dd nc dq 11 m dq 7 v dd v ss v ss v ss v dd dq 10 n dq 8 nc v dd v ss v dd nc dq 9 p nc v dd v ss v ss v ss v dd nc r nc nc nc a 18 nc nc nc t nc a 7 a 6 we a 5 a 4 nc, v ss u nc a 3 a 2 oe a 1 a 0 nc
rev: 1.02 9/2001 3/11 ? 1999, giga semiconductor, inc. for latest documentation see http://www.gsitechnology.com. gs781 16 b note: x: ?h? or ?l? note: permanent device damage may occur if absolute maximum ratings are exceeded. functional operation shall be restricted to recommen ded operating conditions. exposure to higher than recommended voltages for extended periods of time could affect device reliability. notes: 1. input overshoot voltage should be less than v dd +2 v and not exceed 20 ns. 2. input undershoot voltage should be greater than ?2 v and not exceed 20 ns. truth table ce oe we dq 1 to dq 8 v dd current h x x not selected isb1, isb2 l l h read l x l write i dd l h h high z absolute maximum ratings parameter symbol rating unit supply voltage v dd ?0.5 to +4.6 v input voltage v in ?0.5 to v dd +0.5 ( 4.6 v max.) v output voltage v out ?0.5 to v dd +0.5 ( 4.6 v max.) v allowable power dissipation pd 1.5 w storage temperature t stg ?55 to 150 o c recommended operating conditions parameter symbol min typ max unit supply voltage for -10/12/15 v dd 3.0 3.3 3.6 v input high voltage v ih 2.0 ? v dd +0.3 v input low voltage v il ?0.3 ? 0.8 v ambient temperature, commercial range t ac 0 ? 70 o c ambient temperature, industrial range t ai ?40 ? 85 o c
rev: 1.02 9/2001 4/11 ? 1999, giga semiconductor, inc. for latest documentation see http://www.gsitechnology.com. gs781 16 b notes: 1. tested at t a = 25c, f = 1 mhz 2. these parameters are sampled and are not 100% tested. capacitance parameter symbol test condition max unit input capacitance c in v in = 0 v 10 pf output capacitance c out v out = 0 v 7 pf dc i/o pin characteristics parameter symbol test conditions min max input leakage current i il v in = 0 to v dd ?2 ua 2 ua output leakage current i ol output high z, v out = 0 to v dd ?1 ua 1 ua output high voltage v oh i oh = ?4 ma 2.4 output low voltage v ol i ol = +4 ma 0.4 v power supply currents parameter symbol test conditions 0 to 70c ?40 to 85c 10 ns 12 ns 15 ns 10 ns 12 ns 15 ns operating supply current i dd e v il all other inputs 3 v ih or v il min. cycle time i out = 0 ma 225 ma 220 ma 180 ma 270 ma 240 ma 200 ma standby current i sb1 e 3 v ih all other inputs 3 v ih or v il min. cycle time 130 ma 120 ma 110 ma 150 ma 140 ma 130 ma standby current i sb2 e 3 v dd ? 0.2v all other inputs 3 v dd ? 0.2 v or 0.2 v 60 ma 80 ma
rev: 1.02 9/2001 5/11 ? 1999, giga semiconductor, inc. for latest documentation see http://www.gsitechnology.com. gs781 16 b ac test conditions ac characteristics read cycle parameter symbol -10 -12 -15 unit min max min max min max read cycle time t rc 10 ? 12 ? 15 ? ns address access time t aa ? 10 ? 12 ? 15 ns chip enable access time ( ce ) t ac ? 10 ? 12 ? 15 ns output enable to output valid ( oe ) t oe ? 4 ? 5 ? 6 ns output hold from address change t oh 3 ? 3 ? 3 ? ns chip enable to output in low z ( ce ) t lz * 3 ? 3 ? 3 ? ns output enable to output in low z ( oe ) t olz * 0 ? 0 ? 0 ? ns chip disable to output in high z ( ce ) t hz * ? 5 ? 6 ? 7 ns output disable to output in high z ( oe ) t ohz * ? 4 ? 5 ? 6 ns dq vt = 1.4 v 50 w 30pf 1 dq 3.3 v output load 1 output load 2 589 w 434 w 5pf 1 notes: 1. include scope and jig capacitance. 2. test conditions as specified with output loading as shown in fig. 1 unless otherwise noted 3. output load 2 for t lz , t hz , t olz and t ohz . parameter conditions input high level v ih = 2.4 v input low level v il = 0.4 v input rise time tr = 1 v/ns input fall time tf = 1 v/ns input reference level 1.4 v output reference level 1.4 v output load fig. 1& 2
rev: 1.02 9/2001 6/11 ? 1999, giga semiconductor, inc. for latest documentation see http://www.gsitechnology.com. gs781 16 b read cycle 1: ce = oe = v il read cycle 2: we = v ih t aa t oh t rc address data out previous data data valid t aa t rc address t ac t lz t oe t olz ce oe data out t hz t ohz data valid high impedance
rev: 1.02 9/2001 7/11 ? 1999, giga semiconductor, inc. for latest documentation see http://www.gsitechnology.com. gs781 16 b * these parameters are sampled and are not 100% tested. write cycle 1: we controlled write cycle parameter symbol -10 -12 -15 unit min max min max min max write cycle time twc 10 ? 12 ? 15 ? ns address valid to end of write taw 7 ? 8 ? 10 ? ns chip enable to end of write tcw 7 ? 8 ? 10 ? ns data set up time tdw 5 ? 6 ? 7 ? ns data hold time tdh 0 ? 0 ? 0 ? ns write pulse width twp 7 ? 8 ? 10 ? ns address set up time tas 0 ? 0 ? 0 ? ns write recovery time ( we ) twr 0 ? 0 ? 0 ? ns write recovery time ( ce ) twr1 0 ? 0 ? 0 ? ns output low z from end of write twlz * 3 ? 3 ? 3 ? ns write to output in high z twhz * ? 4 ? 5 ? 6 ns t wc address ce we data in oe data out t aw t cw t as t wp t wr t dw t dh t wlz t whz data valid high impedance
rev: 1.02 9/2001 8/11 ? 1999, giga semiconductor, inc. for latest documentation see http://www.gsitechnology.com. gs781 16 b write cycle 2: ce controlled t wc address ce we data in oe data out t aw t wp t as t cw t wr1 t dw t dh data valid high impedance
rev: 1.02 9/2001 9/11 ? 1999, giga semiconductor, inc. for latest documentation see http://www.gsitechnology.com. gs781 16 b package dimensions - 119-pin pbga bpr 1999.05.18 n p a b pin 1 corner k e f c t a b c d e f g h j k l m n p r t u g s d 1 2 3 4 5 6 7 package dimensions - 119 pin pbga unit: mm symbol description min. nom. max a width 13.8 14.0 14.2 b length 21.8 22.0 22.2 c package height (including ball) ? ? 2.40 d ball size 0.60 0.75 0.90 e ball height 0.50 0.60 0.70 f package height (excluding balls) ? 1.46 1.70 g width between balls ? 1.27 ? k package height above board 0.80 0.90 1.00 n cut-out package width ? 12.00 ? p foot length ? 19.50 ? r width of package between balls ? 7.62 ? s length of package between balls ? 20.32 ? t variance of ball height ? 0.15 ? bottom view r top view side view
rev: 1.02 9/2001 10/11 ? 1999, giga semiconductor, inc. for latest documentation see http://www.gsitechnology.com. gs781 16 b * customers requiring delivery in tape and reel should add the character ?t? to the end of the part number. for example: gs781 16 b-12t ordering information part number * package access time temp. range status GS78116B-10 bga 10 ns commercial gs78116b-12 bga 12 ns commercial gs78116b-15 bga 15 ns commercial GS78116B-10i bga 10 ns industrial gs78116b-12i bga 12 ns industrial gs78116b-15i bga 15 ns industrial
rev: 1.02 9/2001 11/11 ? 1999, giga semiconductor, inc. for latest documentation see http://www.gsitechnology.com. gs781 16 b asynchronous sram datasheet revision history rev. code: old; new types of changes format or content page #/revisions/reason gs781 16 rev0.01a 5/1999; 1.00 x/1999 format/typos ? p.2/changed e to ce /consistency. content ? p.2/changed pin t1 from b a to b d /correction gs781 16 rev 1.0010/1999a;rev 1.01 2/2000formatb ? added gsi logo rev 1.01 2/2000formatb; 78116_r1_02 format/content ? updated format to comply with technical publication standards ? finalized document and removed preliminary references

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