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lvds interface ics 4bit lvds receiver BU90LV048 description lvds interface ic of rohm "serializer" "deserializer " operate from 8mhz to 150mhz wide clock range, and number of bits range is from 35 to 70. data is transm itted seven times (7x) stream and reduce cable number by 3(1/3) or less. the rohm's lvds has low swing mode to be able to expect further low emi. driver and receiver of 4 bits operate to 250mhz. it can be used for a variety of purposes, home appliances such as lcd-tv, business machines such as decoders, instruments, and medical equipment. features >500 mbps (250 mhz) switching rates flow-through pinout simplifies pcb layout 150 ps channel-to-channel skew (typical) 100 ps differenti al skew (typical) 3.7 ns maximum propagation delay 3.3v power supply design 6ma and 8ma selectable output drive strength accepts small sw ing (200 mv typical) dif ferential signal level s supports open, short and terminated input fail-safe conforms to ansi/tia/eia-644 standard industrial temperature operating range (-40 to +85) applications car navigation system copier digital tv (signal system) fa equipment medical equipment vending machine, ticket vending machine precaution this chip is not designed to protect from radioactivity. this document may be used as strategic technical data which subjects to cocom regulations.
2 / 12 jun.2008
3 / 12 block diagram + r1 - r out1 r in1+ en + r2 - + r3 - + r4 - r in1- r in2+ r in2- r in3+ r in3- r in4+ r in4- r out2 r out3 r out4 sl figure 1. block diagram
4 / 12 ssop-b16 package outline and specification figure 2. ssop-b16 package outline and specification 1pin mark product no. lv048 lot no.
5 / 12 pin configuration en 16 r out1 15 r out2 14 v cc 13 gnd 12 r out3 11 r out4 10 sl 9 1 r in1+ 2 3 4 5 6 7 8 r in1- r in2- r in2+ r in3+ r in3- r in4- r in4+ figure 3. pin diagram (top view)
6 / 12 pin description table 1 : pin description pin name pin no. type descriptions r in+ 2, 3, 6, 7 lvds in non-inverting receiver input pin r in- 1, 4, 5, 8 lvds in inverting receiver input pin r out 10, 11, 14, 15 lvcmos out receiver output pin sl 9 lvcmos in drive strength select pin : when sl is low or open, rout set 8ma mode. when sl is high, r out set 6ma mode. en 16 lvcmos in receiver enable pin: when en is low or open, the receiver is disabled. when en is high, the receiver is enabled. v cc 13 power power supply pin, +3.3v0.3v gnd 12 gnd ground pin function description input outputs drive strength en sl r in+ ? r in? r out h l or open vid ??? 0v h 8ma vid ? ? ?0.1v l full fail-safe open/short or terminated h h h vid ?? 0v h 6ma vid ? ? ?0.1v l full fail-safe open/short or terminated h all other combinations of en, sl inputs x z
7 / 12 absolute maximum ratings item symbol value unit min. max. supply voltage vcc -0.3 4.0 v input voltage vin -0.3 vcc+0.3 v output voltage vout -0.3 vcc+0.3 v storage temperature range tstg -55 125 package power package pd(mw) derating(mw/ ) 1 ssop-b16 400 4.0 450 *2 4.5 *2 1 at temperature ta > 25 2 package power when mounting on the pcb board. the size of pcb board :70 70 1.6 mm 3 the material of pcb board :the fr 4 glass epoxy board.(3% or les s copper foil area) recommended operating conditions item symbol value unit condition min. typ. max. supply voltage vcc 3.0 3.3 3.6 v operating temperature range topr -40 - 85
8 / 12 dc characteristics symbol parameter conditions pin min typ max units v th differential inpu t high threshold v cm = +1.2v, 0.05v, 2.95v r in+ , - - 100 mv v tl differential inpu t low threshold r in- -100 - - mv vcmr common-mode voltage range v id = 200mv pk to pk 0.1 - 2.3 v i in input current v in = 0 or vcc -20 - +20 a v oh1 output high voltage i oh = ?8 ma, v id = +200 mv, sl=low r out v cc - 0.4 - - v v oh2 output high voltage i oh = ?6 ma, v id = +200 mv, sl= high v cc - 0.4 - - v v ol1 output low voltage i ol = 8 ma, v id = ?200 mv, sl=low - - 0.4 v v ol2 output low voltage i ol = 6 ma, v id = ?200 mv, sl= high - - 0.4 v i os output short circuit current enabled, v out = 0v -15 -80 - ma i oz output 3-state current disabled, v out = 0v or v cc -10 1 +10 ua v ih input high voltage sl v cc 0.8 - v cc v v il input low voltage en gnd - v cc 0.2 v i i input current v in = 0v or v cc , other input = v cc or gnd -10 - +10 a v cl input clamp voltage i cl = ?18 ma -1.5 -0.8 - v i cc no load supply current receivers enabled en = v cc , inputs open v cc - 1 - ma i ccz no load supply current receivers disabled en= gnd, sl = gnd, inputs open - 0.5 - ma
9 / 12 switching characteristics v cc = +3.3v 0.3v, t opr = -40 to +85. symbol parameter conditions min typ max units t phld differential propagation delay high to low c l = 15pf v id = 200mv 1.2 2.0 3.7 ns t plhd differential propagation delay low to high (figure 4 and figure 5) 1.2 1.9 3.7 ns t skd1 differential pulse skew |t phld C t plhd | 0 0.1 0.4 ns t skd2 differential channel-to-channel skew; same device 0 0.15 0.5 ns t skd3 differential part to part skew - - 1.0 ns t skd4 differential part to part skew - - 1.5 ns t tlh rise time - 0.5 1.5 ns t thl fall time - 0.5 1.5 ns t phz disable time high to z r l = 2k - 8 14 ns t plz disable time low to z c l = 15pf - 8 14 ns t pzh enable time z to high (figure 6 and figure 7) - 3 14 ns t pzl enable time z to low - 9 14 ns f max maximum operating frequency all channels switching 250 - - mhz r r in+ receiver enabled generator 50 r in- cl r out 50 figure 4. receiver propagation delay and transition time test circuit
10 / 12 r in - r in + r out 0v differential 80 1.5v 20 tlh 80 1.5v 20 thl +1.2v +1.3v +1.1v plhd phld v oh v ol v id = 200mv figure 5. receiver propagation delay and transition time wavef orms 1/ 4 BU90LV048 generator cl 50 en device under test r out rl r in+ r in- v cc s 1 figure 6. receiver 3-state delay test circuit
11 / 12 1.5v phz 1.5v pzh 3v 0v 50 v ol 0.5v plz pzl 50 en when sl = l or open output when v id = -100mv output when v id = +100mv v oh gnd v cc 0.5v figure7. receiver 3-st ate delay waveforms typical application rt 100 data output enable data input 1/4 bu90lv047 1/4 BU90LV048 figure 8. point-to- point application
catalog no.08t243a '08.6 rohm ?

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