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gs78108ab 1m x 8 8mb asynchronous sram 8, 10, 12 ns 3.3 v v dd bga commercial temp industrial temp rev: 1.04a 2/2007 1/12 ? 2003, gsi technology specifications cited are subject to change without notice . for latest documentation see http://www.gsitechnology.com. features ? fast access time: 8, 10, 12 ns ? cmos low power operation: 240/190/170 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 ? rohs-compliant package available description the gs78108a is a high speed cmos static ram organized as 1,048,576-words by 8-bits. static design eliminates the need for external clocks or timing strobes. the gs78108operates on a single 3.3 v power supply, and all inputs and outputs are ttl-compatible. the gs7810a8 is available in a 14 mm x 22 mm bga package. symbol description a 0 to a 19 address input dq 1 to dq 8 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 pin descriptions memory array row decoder column decoder address input buffer control i/o buffer a 0 ce we oe dq 1 a 19 dq 8 block diagram
1 2 3 4 5 6 7 a nc a 15 a 14 a 16 a 13 a 12 nc b nc 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 nc nc v dd v ss v dd nc nc f nc v dd v ss v ss v ss v dd nc g dq 1 nc v dd v ss v dd nc dq 5 h dq 2 v dd v ss v ss v ss v dd dq 6 j v dd v ss v dd v ss v dd v ss v dd k dq 3 v dd v ss v ss v ss v dd dq 7 l dq 4 nc v dd v ss v dd nc dq 8 m nc v dd v ss v ss v ss v dd nc n nc nc v dd v ss v dd nc nc p nc v dd v ss v ss v ss v dd nc r nc nc nc nc nc nc nc t nc a 7 a 6 we a 5 a 4 nc u a 18 a 3 a 2 oe a 1 a 0 a 19 gs78108ab specifications cited are subject to change without notice . for latest documentation see http://www.gsitechnology.com. rev: 1.04a 2/2007 2/12 ? 2003, gsi technology 1m x 8 async sram in bump , 14x22mm bga?top view (package b) note: bumps 3c and 5c are actually nc?s but should be wired 3c = v dd and 5c = v ss to assure compatibility with future versions.
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 ? gs78108ab specifications cited are subject to change without notice . for latest documentation see http://www.gsitechnology.com. rev: 1.04a 2/2007 3/12 ? 2003, gsi technology x: ?h? or ?l? 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 note: permanent device damage may occur if absolute maximum ratings ar e exceeded. functional operation shall be restricted to recommended operating conditions. exposure to higher than recommended voltages for extended peri ods of time could affect device reliability . recommended oper ating conditions parameter symbol min typ max unit supply voltage for -8/10/12 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 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.
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 gs78108ab specifications cited are subject to change without notice . for latest documentation see http://www.gsitechnology.com. rev: 1.04a 2/2007 4/12 ? 2003, gsi technology notes: 1. tested at t a = 25c, f = 1 mhz 2. these parameters are sampled and are not 100% tested 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 8 ns 10 ns 12 ns 8 ns 10 ns 12 ns operating supply current i dd e v il all other inputs v ih or v il min. cycle time i out = 0 ma 160 ma 130 ma 115 ma 180 ma 150 ma 135 ma standby current i sb1 e v ih all other inputs v ih or v il min. cycle time 60 ma 50 ma 50 ma 80 ma 70 ma 70 ma standby current i sb2 e v dd - 0.2v all other inputs v dd - 0.2v or 0.2v 20 ma 40 ma
dq vt = 1.4 v 50 30pf 1 dq 3.3 v output load 1 output load 2 589 434 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 gs78108ab specifications cited are subject to change without notice . for latest documentation see http://www.gsitechnology.com. rev: 1.04a 2/2007 5/12 ? 2003, gsi technology ac test conditions ac characteristics read cycle parameter symbol -8 -10 -12 unit min max min max min max read cycle time t rc 8 ? 10 ? 12 ? ns address access time t aa ? 8 ? 10 ? 12 ns chip enable access time ( ce ) t ac ? 8 ? 10 ? 12 ns output enable to output valid ( oe ) t oe ? 3.5 ? 4 ? 5 ns output hold from address change t oh 3 ? 3 ? 3 ? ns chip enable to output in low z ( ce ) t * 3 ? 3 ? 3 ? ns output enable to output in low z ( oe ) t * 0 ? 0 ? 0 ? ns chip disable to output in high z ( ce ) t * ? 4 ? 5 ? 6 ns output disable to output in high z ( oe ) t * ? 3.5 ? 4 ? 5 ns lz olz hz ohz
t aa t oh t rc address data out previous data data valid gs78108ab specifications cited are subject to change without notice . for latest documentation see http://www.gsitechnology.com. rev: 1.04a 2/2007 6/12 ? 2003, gsi technology read cycle 1: ce = oe = v il * these parameters are sampled and are not 100% tested write cycle parameter symbol -8 -10 -12 unit min max min max min max write cycle time twc 8 ? 10 ? 12 ? ns address valid to end of write taw 5.5 ? 7 ? 8 ? ns chip enable to end of write tcw 5.5 ? 7 ? 8 ? ns data set up time tdw 4 ? 5 ? 6 ? ns data hold time tdh 0 ? 0 ? 0 ? ns write pulse width twp 5.5 ? 7 ? 8 ? 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 * ? 3.5 ? 4 ? 5 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 gs78108ab specifications cited are subject to change without notice . for latest documentation see http://www.gsitechnology.com. rev: 1.04a 2/2007 7/12 ? 2003, gsi technology write cycle 1: we controlled twc address ce ub , lb we data in oe data out taw twp tas tcw twr1 tdw tdh data valid high impedance tbw write cycle 3: ub , lb control
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 gs78108ab specifications cited are subject to change without notice . for latest documentation see http://www.gsitechnology.com. rev: 1.04a 2/2007 8/12 ? 2003, gsi technology write cycle 2: ce controlled
gs78108ab specifications cited are subject to change without notice . for latest documentation see http://www.gsitechnology.com. rev: 1.04a 2/2007 9/12 ? 2003, gsi technology package dimensions?119-bump fp bga (package b, variation 1 ) (date code: yyww.31) 7 6 5 4 3 2 1 a1 bottom view 1.27 7.62 1.27 20.32 140.20 220.20 b a 0.20(4x) ?0.10 ?0.30 c c a b s s ?0.60~0.90 (119x) c seating plane 0.15 c 0.50~0.70 2.06.0.13 0.900.10 0.15 c a b c d e f g h j k l m n p r t u 0.560.05 s s a b c d e f g h j k l m n p r t u 0.70 ref 12.00 1 2 3 4 5 6 7 220.20 19.50 pin #1 corner ?1.00(3x) ref 30 typ.
gs78108ab specifications cited are subject to change without notice . for latest documentation see http://www.gsitechnology.com. rev: 1.04a 2/2007 10/12 ? 2003, gsi technology package dimensions?119-bump fp bga (package b, variation 2 ) (date code: yyww.3h) a b c d e f g h j k l m n p r t u 1 2 3 4 5 6 7 7 6 5 4 3 2 1 a1 top view a1 bottom view 1.27 7.62 1.27 20.32 140.10 220.10 b a 0.20(4x) ?0.10 ?0.30 c c a b s s ?0.60~0.90 (119x) c seating plane 0.15 c 0.50~0.70 1.86.0.13 a b c d e f g h j k l m n p r t u s s
ordering information part number 1 package access time temp. range status gs78108ab-8 119-bump bga 2 8 ns commercial gs78108ab-10 119-bump bga 2 10 ns commercial gs78108ab-12 119-bump bga 2 12 ns commercial gs78108ab-8i 119-bump bga 2 8 ns industrial GS78108AB-10I 119-bump bga 2 10 ns industrial gs78108ab-12i 119-bump bga 2 12 ns industrial gs78108ab-15i 119-bump bga 2 15 ns industrial gs78108agb-8 rohs-compliant 1 19-bump bga 2 8 ns commercial gs78108agb-10 rohs-compliant 1 19-bump bga 2 10 ns commercial gs78108agb-12 rohs-compliant 1 19-bump bga 2 12 ns commercial gs78108agb-8i rohs-compliant 1 19-bump bga 2 8 ns industrial gs78108agb-10i rohs-compliant 1 19-bump bga 2 10 ns industrial gs78108agb-12i rohs-compliant 1 19-bump bga 2 12 ns industrial gs78108agb-15i rohs-compliant 1 19-bump bga 2 15 ns industrial gs78108ab specifications cited are subject to change without notice . for latest documentation see http://www.gsitechnology.com. rev: 1.04a 2/2007 11/12 ? 2003, gsi technology notes: 1. customers requiring delivery in tape and reel should add the character ?t? to the end of the part number. for example: gs78108ab-12t 2. please see pages 8 and 9 for date code information for v ariation 1 and variation 2 of the 119-bump bga.
revision history rev. code: old; new types of changes format or content page #/revisions/reason gs78108ab_r1 ? creation of new datasheet gs78108ab_r1_01 content ? added ac specifications to datasheet gs78108ab_r1_01; gs78108a b_r1_02 content/format ? updated format ? added variation informat ion to package mechanical gs78108ab_r1_02; gs78108a b_r1_03 content ? added variation 2 119 bga to datasheet ? added date codes to mechanicals gs78108ab_r1_03; gs78108a b_r1_04 content ? added rohs-compliant package information ? (rev1.04a: added missing write cycle 3 timing diagram) gs78108ab specifications cited are subject to change without notice . for latest documentation see http://www.gsitechnology.com. rev: 1.04a 2/2007 12/12 ? 2003, gsi technology

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