GS78108Ab 1m x 8 8mb asynchronous sram 8, 10, 12 ns 3.3 v v dd bga commercial temp industrial temp rev: 1.02 11/2004 1/10 ? 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 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. pin descriptions 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 memory array row decoder column decoder address input buffer control i/o buffer a 0 ce we oe dq 1 a 19 dq 8 bl oc k di agram
GS78108Ab specifications cited are subject to change without notice . for latest documentation see http://www.gsitechnology.com. rev: 1.02 11/2004 2/10 ? 2003, gsi technology 1m x 8 async sram in bump , 14x22mm bga?top vi ew (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. 1234567 anca 15 a 14 a 16 a 13 a 12 nc bnca 11 a 10 ce a 9 a 8 nc cncnc v dd , nc a 17 v ss , nc nc nc dnc v dd v ss v ss v ss v dd nc encnc v dd v ss v dd nc nc fnc v dd v ss v ss v ss v dd nc gdq 1 nc v dd v ss v dd nc dq 5 hdq 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 kdq 3 v dd v ss v ss v ss v dd dq 7 ldq 4 nc v dd v ss v dd nc dq 8 mnc v dd v ss v ss v ss v dd nc nncnc v dd v ss v dd nc nc pnc v dd v ss v ss v ss v dd nc r ncncncncncncnc tnca 7 a 6 we a 5 a 4 nc ua 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: 1.02 11/2004 3/10 ? 2003, gsi technology x: ?h? or ?l? note: permanent device damage may occur if absolute maximum ratings ar e exceeded. functional operation shall be restricted to recomme nded operating conditions. exposure to higher than recommended voltages for extended peri ods 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 ? lx l write i dd lh 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 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
GS78108Ab specifications cited are subject to change without notice . for latest documentation see http://www.gsitechnology.com. rev: 1.02 11/2004 4/10 ? 2003, gsi technology 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 7pf 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
GS78108Ab specifications cited are subject to change without notice . for latest documentation see http://www.gsitechnology.com. rev: 1.02 11/2004 5/10 ? 2003, gsi technology ac test conditions ac characteristics read cycle parameter symbol -8 -10 -12 unit minmaxminmaxminmax 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 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 * ?4?5?6 ns output disable to output in high z (oe ) t ohz * ?3.5?4?5 ns 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: 1.02 11/2004 6/10 ? 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 )twr10?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 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: 1.02 11/2004 7/10 ? 2003, gsi technology write cycle 1: we controlled write cycle 2: ce controlled 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 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: 1.02 11/2004 8/10 ? 2003, gsi technology package dimensions?119-bump pbga (package b, variation 1) bpr 1999.05.18 n p a b pin 1 corner k e f ct 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 admissions - 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) 1.96 2.06 2.19 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
GS78108Ab specifications cited are subject to change without notice . for latest documentation see http://www.gsitechnology.com. rev: 1.02 11/2004 9/10 ? 2003, gsi technology * customers requiring delivery in tape and reel should add the character ?t? to the end of the part number. for example: GS78108Ab-12t ordering information part number * package access time temp. range status GS78108Ab-8 119-bump bga (var. 1) 8 ns commercial GS78108Ab-10 119-bump bga (var. 1) 10 ns commercial GS78108Ab-12 119-bump bga (var. 1) 12 ns commercial GS78108Ab-8i 119-bump bga (var. 1) 8 ns industrial GS78108Ab-10i 119-bump bga (var. 1) 10 ns industrial GS78108Ab-12i 119-bump bga (var. 1) 12 ns industrial GS78108Ab-15i 119-bump bga (var. 1) 15 ns industrial
GS78108Ab specifications cited are subject to change without notice . for latest documentation see http://www.gsitechnology.com. rev: 1.02 11/2004 10/10 ? 2003, gsi technology revision history rev. code: old; new types of changes format or content page #/revisions/reason GS78108Ab_r1 ? creation of new datasheet
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