NE580 Datasheet | Signetics

NE58O-F,N DESCRIPTION Features T h e N E 5 8 0i s a d u a l b a r - g r a p hl o g i cc i r c u i t a Dual channeldevice designedto provideallthe functionsneces_- a Easilyexpandableto handlemore chan- sary to drive a gas dischargeself-scan"") nels. b a r - g r a p hp a n e l .T h e N E 5 8 0i s c o n l i g u r e d o Single5 volt supply to drivea 201elementbar-graphin either5 a 3, 5 or 6 phaseoperation or 6 phaseoperation.Phasenumberselec- a Can be custom maskedtor dltferenl cath- t i o n i s o b t a i n e db y a p p l y i n ga l o g i c0 o r 1 ode segmentcounts,(maximum240) levelto the phaseselectpin.3 phaseopera- Equivalent8-bit resolutionol displayed t i o nf o r a 1 0 1e l e m e n t d e v i c e c abne a t t a i n e d intormalion. by a wire-orconnectionof adjacentcathode Overrangeindicaiionoutpuls. phaseoutputs. The deviceinputsacceptan analogvoltage in the range0 to 2.5Vand performsan A/D conversionwith relerenceto a fixed input voltageat the referenceterminal.On-chip f u n c t i o n si n c l u d ea c l o c k g e n e r a t o rl,i n e a r r a m p g e n e r a t o r ,c o n t r o l l o g i c a n d R O M decoding.Output functions prise 2 a n o d ec o n t r o ll i n e s ,2 o v e r r a n g ei n d i c a t i o n outputs, 6 cathode phase outputs and 1 cathode resetoutput.Referto the system b l o c kd i a g r a mf o r c l a r i f i c a t i o n ' A m i n i m u m o f e x t e r n a lc o m p o n e n t sa r e r e o u i r e df o r t h e w h o l ec o n v e r s i o na n d d i s play system shown in the typical application. The NE5B0can be exoanded to handle more analog channelsusing external parators. Either LM3934 or LM339A type parators will function well.A fewexternal ow-costlogicpackages can in additionprovidebinary or BCD encoded data to interface with a looic controlsystem. T h e d e v i c ei s s u p p l i e di n a 2 2 - p i np l a s t i c m o l d e do r c e r a m i cd u a l - i n - l i n ep a c k a g e . - s e l F s c a n i s a t r a d e m a r ko...