GM3485E 15kV E S D-Pr ot ect ed ,F ai l -S afe ,H i gh-S peed(10M bps ) S l ew -R at e-Li m i t ed R S -485 Tr an s cei ve r s Gen er al Des cr i pt i on F eat u r es The GM 3485E i s +/ - 15kV el ect r os t at i c di s charge (ES D) prot ect ed, hi gh- s peed True Fa i l -S afe R ecei ver W hi le M ai nt ai ni ng t rans ce i ver for R S -485 com m uni cat i on t hat EIA / TIA - 485 C om pat i bi li t y cont ai n one dri ver and one rece i ver. The devi ce fea t ures fai l -s afe ci rcui t ry, whi ch guar ant ee s a Low Qui es cent S uppl y C urrent : 500uA l ogi c- hi gh rec ei ver out put when t he rece i ver Al l ow Up t o 32 Trans ce i vers on t he Bus i nput s are open or s hort ed. Thi s m eans t hat t he rec ei ver out put wi l l be l ogi c-hi gh even i f al l 1nA Low -C urre nt S hut down M ode t rans m i t t ers on a t erm i nat ed bus are di s abl ed. The GM 3485E dri ver s l ew rat e i s not l i m i ted , A ppl i cat ion s m aki ng t rans m i t s peeds up t o 10M bps pos s i bl e. R S -485 C om m uni cat i ons Al l t rans m i t t er out put s and rec ei ver i nput s are prot ect e d t o +/ - 15kV us i ng t he Hum an Body Le vel Trans l at ors M odel . The t rans cei ve r t yp i ca l l y draws 500 M ot or C ont rol l er m i cron am pere of s uppl y current when unl oaded, or when ful l y l oaded wi t h t he dri ver In dus t ri al C ont rol Lo cal Area Net works di s abl ed. Thi s devi ce ha s a 1-uni t -l oad rec ei ver Energy M et er Net works i nput i m pedance t hat al l ows up t o 32 t rans ce i vers on t he bus . The GM 3485E i s P ower In vert e rs i nt ended for hal f-dupl ex com m uni cat i ons . Bui l di ng Aut om at i on Net works I / O E S D pr ot ect i on Tel ecom m uni cat i ons Equi pm ent Hum an Body M odel : 15kV IE C 61000-4-2 PI N C on fi gur at i on C ont act di s charge : 12kV Ai r di s charge : 15kV GM 3 48 5E P i n fi gu r e Or der i n g I n for m at i on Dat a S up pl y L ow - P ow er Rx / T x IE C 6 10 00 - 4- 2 T E M P P IN P ART Dup l ex Rat e Vol t ag e S hut d o w n on B us Ai r di sch a rg e RANGE P ACK AGE GM 3 48 5E Hal f 1 0M b ps 3 . 3V YE S 3 2 1 5kV - 4 0+8 5 8 S OP w w w.gmmi cro. com Han g Zh ou Gat e mo d e M i croel ec t ron i cs L t d - 1 -GM3485E Pi n Des cr i pt i on PI N N A ME FU N C T I O N Re c e ive r O u tp u t. Wh e n RE is lo w a n d if A - B -5 0 mV , RO w ill b e h igh if A - B 1 RO -2 0 0 mV , RO w ill b e lo w . Re c e ive r O u tp u t En a b le . D riv e RE lo w to e n a b le RO RO is h igh im p e d a n c e w h e n RE is 2 R E h igh . D riv e RE h igh a n d D E lo w to e n te r lo w -p o w e r s h u td o w n m o d e . D riv e r O u tp u t En a b le . D riv e D E h igh to e n a b le d rive r o u tp u ts . Th e s e o u tp u ts a re h igh 3 D E im p e d a n c e w h e n D E is lo w . D riv e RE h igh a n d D E lo w to e n te r lo w -p o w e r s h u td ow n mo d e . D riv e r In p u t. Wit h D E h igh , a lo w o n D I fo rc e s n o n-in ve rt in g o u tp ut lo w a n d in ve rti n g 4 D I o u tp u t h igh . Sim i la rly, a h igh o n D I fo rc e s n o n-i n ve rt in g o u tp u t h igh a n d in ve rt in g o u tp ut lo w . 5 G N D G ro u n d 6 A N o n -i n ve rti n g Re c e ive r In p u t a n d N o n -i n ve rti n g D riv e r O u tp u t. 7 B In ve rti n g Re c e ive r In p u t a n d In ve rti n g D riv e r O u tp u t. V CC Po s iti ve Su p p ly 3 . 0 V V CC 3 . 6V . 8 A B S OLUTE M A XI M UM R A TI NGS P ARAM E T E R S YM B OL N U M UNIT S S u pp l y Vo l tage ( V C C ) V +6 . 0 V C C C o n tr o l I n pu t Vo l tage ( , DE ) , DE - 0 .3 t o V +0 . 3 V R E R E C C Dr i ver I n pu t V ol t age ( DI ) DI - 0 . 3 t oV +0 . 3 V C C Dr i ver Ou t pu t Vo l t age ( A, B ) A, B 1 3 V R ecei v er I n pu t V ol t age ( A, B ) A, B 1 3 V R ecei v er Ou t pu t V ol t age ( R O) R O - 0 . 3V +0 . 3 V C C C o n ti n uo us P o wer Di ssi p at i o n S OP 8 4 71 mW Op er at i n g Te mp er at u r e R an ges - 4 0+8 5 S t or age Te mp er at u r e R an ge - 6 5+1 50 Le ad Te mp er at u r e ( so l der i n g, 1 0s) 3 00 DC E LE C TRI C A L C H AR A C TER I S TI CS ( V C C = + 3 .3V 5 %, TA = T t o T , u nl ess o t her wi se n ot ed . Typ i ca l val u es ar e at V C C = +3 . 3V an d TA = +2 5 C . ) ( No t e 1 ) M I N M AX P ARAM E T E R CONDIT IO NS M IN T YP M AX S YM B OL UNIT S D R I V ER Di ff e r en t i al Dr i ver Ou t pu t VO D 1 F i gu r e 1 2 . 0 V ( No Lo ad ) V F i gu r e 1 , R = 2 7 1 . 5 V Di ff e r en t i al Dr i ver Ou t pu t O D 2 C h an ge- i n - M agn i t ud e o f 0 .2 V Di ff e r en t i al Ou t pu t V ol t age V F i gu r e 1 , R = 2 7 O D ( No t e 2 ) Dr i ve r Co m mo n - Mo d e F i gu r e 1 , R = 2 7 VO C 1 3 V Ou t p u t V o l t ag e w w w.gmmi cro. com Han g Zh ou Gat e mo d e M i croel ec t ron i cs L t d - 2 -