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shanghai belling corp., ltd BL93C46 1 BL93C46 1k bits (128 x 8 or 64 x 16) three-wire serial eeprom features three-w i re seri al interfac e v cc = 1.8v to 5.5v 2 mhz rate ( 5 v) compatibility self-timed write cy cle (5 ms max) 1 million write cy cles guaranteed data retention > 100 y ears 8-lead pdip, 8-lead jedec so ic and 8-lead tssop packages description t he BL93C46 provi des 10 24 bits of serial el ectricall y er asa b le pr ogramm a ble re ad on l y memor y (eep rom) orga nize d as 6 4 w o rds of 16 b i ts each, w h en the org pi n is conn ected to v cc an d 1 28 w o rds of 8 b i ts e a c h w h e n it is tied to gro und. t hebl93 c46 is av aila bl e in spac e-savi ng 8-le a d pdip, 8-lead t ssop and 8-lea d jedec soic packag e s. t he bl93 c46 is en abl ed throu gh the chi p select pin (cs), and a ccessed via a 3 - w i re serial i n terface consisti ng of data input (di), data output (do), and shift c l ock (sk). upon receivi ng a r e a d instructio n at di, the address i s dec od ed a n d the data is clo cked out seri all y on th e data o u tput pin do. t he w r it e cy cl e is complete l y sel f -timed and no separ ate eras e c y cle is req u ir ed bef ore w r ite . t he w r ite cy c l e i s onl y en ab led w hen it is in t he erase/w r ite enabl e st ate. w h en cs is brou g h t ?high? foll o w i ng the initi a tio n of a w r ite cy cle, the do pin out puts the ready /busy status. order information part num b er package shipping b l 9 3 c 4 6 - d i p p d i p 8 t u b e b l 9 3 c 4 6 - s o p s o p 8 tube 2500 pcs / t a pe & reel b l 9 3 c 4 6 - t s s o p t s s o p 8 tube 3000 pcs / t a pe & reel
shanghai belling corp., ltd BL93C46 2 pin descriptions block diagram
shanghai belling corp., ltd BL93C46 3 electrical characteristics
shanghai belling corp., ltd BL93C46 4 ac electrical characteristics
shanghai belling corp., ltd BL93C46 5 functional description t he bl93c4 6 is accesse d via a sim p le a nd versati l e th ree- w i r e seri al communic a tio n interfac e. device oper ation is co ntroll ed b y s e v en i n structions issue d b y th e host proc esso r. a valid instr u ction starts w i th a rising ed ge of cs and c onsis ts of a start bit (logic? 1?) foll o w e d b y th e ap propri a te o p co de a nd the de sired memory address location. re a d (re a d ) : t he read (read) instructio n contains the addr ess code for the memor y locati on to be read. after the instru ction a nd addr ess are dec od ed, data fr om the se lecte d m e mo r y l o catio n is ava ila ble at the serial o u tput pi n do. output d a ta chan ges ar e s y nc hron iz e d w i th the risin g edg es of serial clock sk. it sh ou l d be noted that a dummy bit (logic ?0?) precedes the 8- or 16-bit data output string. er a s e/write (ewen): t o assure data in tegrit y , the part autom atical l y goes into t he erase/w r ite disabl e (ew d s) state w h e n po w e r is first applie d. an erase/w r ite enab le(ewen) instructi on mu st be exec uted first before a n y pr ogrammi ng in structions can be carried o u t. please not e that once in the ew en state, progr ammin g r e mai n s en ab le d until a n ew d s instructio n is execute d or v cc p o w e r is re moved from th e part. er a s e (er a se): t he erase (erase) instruction programs all bi ts in the specified memor y location to the logic a l ? 1 ? state. t he self-timed eras e c y cle s t arts once the erase inst ruc t ion and addre ss are decoded. t he do pin outputs the read y / bu s y status of the part if cs is broug ht high afte r being ke pt lo w f o r a minim u m of 250 ns (t cs). a log i c ?1? at pin do in dic a tes that the se lecte d memor y locat i on has bee n er ased, a nd th e p a rt is ready for another instruction. write (wr i te): t he w r i t e (w rit e ) instruction contai ns the 8 or 16 bits of data to be w r itten into the specifi ed mem o r y l o catio n . t h e self-timed pr ogrammi ng c y c l e, twp, starts after the last bit of data is received at serial data i nput pi n di. t h e do pin outp u ts the read y/ bus y status of the part if cs i s brought hi gh after bei ng kept lo w for a minimum of 250 ns (t cs). a logic ?0? at do ind i cates th at progr ammin g is stil l i n pro g r e ss . a logic ?1? indi cates that the memor y loc a ti on at the specified ad dress ha s been w r itten w i t h the data patter n contai ne d in th e instructi on a nd the part is ready for further instructions . a read y / bu s y status c ann ot b e obtained if the cs is brought hi gh after the end of the selftim ed programming cy cle, t w p. er a s e a ll (er a l): t he erase all (eral) instructio n prog rams ever y bit in the memor y arra y to the l ogi c ?1? state and is pri m aril y use d for testing purp o se s. t he do pin outputs the re ad y/ bus y stat u s of the part if cs is
shanghai belling corp., ltd BL93C46 6 brou ght hig h af ter bein g kept lo w for a min i m u m of 250 ns (t cs). t he er al instructio n is valid on l y at vcc = 5.0v 10%. write a ll (wr a l): t he w r ite all (w ra l) instructi on p r ograms all m e mor y loc a tions w i t h the data p a tter n s specifi ed in th e instruction. t he do pin o u tp uts the rea d y / b us y status of the part if cs i s broug ht hig h after being kept low for a minimum of 250 ns (t cs). t he w r al instruction is valid only at vcc = 5.0v 10%. er a s e/write dis a bl e ( e wds): t o protect agai nst accid ental d a ta disturb, the er ase/w r ite di sabl e (ew d s) instruction disa bl es all progr amming mo d e s an d shoul d be execute d after all progr ammin g oper ations. t he op erati on of the re ad i n str u ction is in de p end ent of b o th the ew en an d ew ds instruc t ions and can be executed at any time. t i ming diagrams
shanghai belling corp., ltd BL93C46 7
shanghai belling corp., ltd BL93C46 8
shanghai belling corp., ltd BL93C46 9 package information 8-lead pdip outline dimensions millimeter symbol m i n n o m m a x a 3 . 6 0 3 . 8 0 4 . 0 0 a 2 3 . 1 0 3 . 3 0 3 . 5 0 b 0 . 4 4 - 0 . 5 3 b 1 1 . 5 2 b s c c 0 . 2 5 - 0 . 3 1 c 1 0 . 2 4 0 . 2 5 0 . 2 6 d 9 . 0 5 9 . 2 5 9 . 4 5 e 1 6 . 1 5 6 . 3 5 6 . 5 5 e 2 . 5 4 b s c ea 7 . 6 2 b s c l 3 . 0 0 - -
shanghai belling corp., ltd BL93C46 10 8-lead soic outline dim e nsions millimeter symbol m i n n o m m a x a - - 1 . 7 7 a 1 0 . 0 8 0 . 1 8 0 . 2 8 b 0 . 4 4 - 0 . 5 3 c 0 . 2 1 - 0 . 2 6 d 4 . 7 0 4 . 9 0 5 . 1 0 e 5 . 8 0 6 . 0 0 6 . 2 0 e 1 3 . 7 0 3 . 9 0 4 . 1 0 e 1 . 2 7 b s c 0 - 8
shanghai belling corp., ltd BL93C46 11 8-lead tssop outline dimensions millimeter symbol m i n n o m m a x a - - 1 . 2 0 a 1 0 . 0 5 - 0 . 1 5 a 2 0 . 9 0 1 . 0 0 1 . 0 5 a 3 0 . 3 4 0 . 4 4 0 . 5 4 b 0 . 2 0 - 0 . 2 8 b 1 0 . 2 0 0 . 2 2 0 . 2 4 c 0 . 1 0 - 0 . 1 9 c 1 0 . 1 0 0 . 1 3 0 . 1 5 d 2 . 8 3 2 . 9 3 3 . 0 3 e 6 . 2 0 6 . 4 0 6 . 6 0
shanghai belling corp., ltd BL93C46 12 e1 4.30 4.40 4.50 e 0.65bsc l 0.45 0.60 0.75 l1 1.00ref l2 0.25bsc r 0.09 - - r1 0.09 - - s 0.20 - - 1 0 - 8 2 10 12 14 3 10 12 14

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