note: for detailed information on purchasing options, contact your local allegro field applications engineer or sales representative. allegro microsystems, inc. reserves the right to make, from time to time, revisions to the anticipated product life cycle plan for a product to accommodate changes in production capabilities, alternative product availabilities, or market demand. the information included herein is believed to be accurate and reliable. however, allegro microsystems, inc. assumes no respon- sibility for its use; nor for any infringements of patents or other rights of third parties which may result from its use. recommended substitutions: 10-bit serial input latched source driver a6810 for existing customer transition, and for new customers or new appli- cations, contact allegro sales. date of status change: november 1, 2010 this device is no longer in production. the device should not be purchased for new design applications. samples are no longer available. discontinued product
description the a6810 combines 10-bit cmos shift registers, ac com pa ny ing data latches, and control cir cuit ry with bipolar sourcing out puts and pnp active pull-downs. de signed pri mar ily to drive vacuum-flu o res cent (vf) displays, the 60 v and ?40 ma output ratings also allow this device to be used in many other peripheral power driver ap pli ca tions. the a6810 features an increased data input rate (com pared with the older ucn/ucq5810-f) and a con trolled output slew rate. the cmos shift register and latches allow direct interfacing with microprocessor-based systems. with a 3.3 or 5 v logic supply, serial data-input rates of at least 10 mhz can be attained a cmos serial data output permits cascaded con nec tions in ap pli ca tions re quir ing additional drive lines. similar devices are available as the a6812 (20-bit) and a6818 (32-bit). the a6810 output source drivers are npn dar ling tons, capable of sourcing up to 40 ma. the controlled output slew rate reduces elec tro mag net ic noise, which is an important consideration in systems that include telecommunications and microprocessors, and to meet government emissions regulations. for inter-digit 26182.124i features and benefits ? controlled output slew rate ? high-speed data storage ? 60 v minimum output breakdown ? high data-input rate ? pnp active pull-downs ? low output-saturation voltages ? low-power cmos logic and latches ? improved replacements for tl4810x, ucn5810x, and ucq5810x 10-bit serial input latched source driver continued on the next page? packages: functional block diagram not to scale a6810 18-pin dip (a package) 20-pin soicw (lw package)
10-bit serial input latched source driver a6810 2 allegro microsystems, inc. 115 northeast cutoff worcester, massachusetts 01615-0036 u.s.a. 1.508.853.5000; www.allegromicro.com selection guide part number pb-free packing ambient temperature, t a (c) package a6810ea-t yes 21 pieces/tube ?40 to 85 18-pin dip a6810sa-t yes 21 pieces/tube ?20 to 85 a6810elwtr-t yes 1000 pieces/13-in. reel ?40 to 85 20-pin soic-w a6810klwtr-t yes 1000 pieces/13-in. reel ?40 to 125 a6810slwtr-t yes 1000 pieces/13-in. reel ?20 to 85 *variant is in production but has been determined to be last time buy. this classification indicates that the variant is obsole te and notice has been given. sale of the variant is currently restricted to existing customer applications. the variant should not be purchased for new design applications because of obsolescence in the near future. samples are no longer available. status date change may 3, 2010. deadline for receipt of last time buy orders is october 29, 2010. blanking, all output drivers can be dis abled and all sink drivers turned on with a blank ing input high. the pnp active pull- downs can sink at least 2.5 ma. the a6810 is available in three temperature ranges for op ti mum per for mance in commercial (s), industrial (e), and automotive (k) ap pli ca tions. it is provided in two package styles, through-hole dip (package a) and surface-mount soic (package lw). copper leadframes, low logic-power dis si pa tion, and low output-saturation voltages allow all devices to source 25 ma from all outputs continuously over the full operating tem pera ture range. the lead (pb) free versions have 100% matte tin leadframe plating. description (continued) absolute maximum ratings* characteristic symbol notes rating units logic supply voltage v dd 7.0 v driver supply voltage v bb 60 v input voltage range v in ?0.3 to v dd + 0.3 v continuous output current range i out ?40 to 15 ma operating ambient temperature t a range e ?40 to 85 oc range k ?40 to 125 oc range s ?20 to 85 oc maximum junction temperature t j (max) 150 oc storage temperature t stg ?55 to 125 oc *caution: these cmos devices have input static protection (class 2) but are still susceptible to damage if exposed to extremely high static electrical charges.
10-bit serial input latched source driver a6810 3 allegro microsystems, inc. 115 northeast cutoff worcester, massachusetts 01615-0036 u.s.a. 1.508.853.5000; www.allegromicro.com thermal characteristics characteristic symbol test conditions* value units package thermal resistance r ja package a, 1-layer pcb with copper limited to solder pads 65 oc/w package lw, 1-layer pcb with copper limited to solder pads 90 oc/w *additional thermal information available on the allegro website. pin-out diagrams
10-bit serial input latched source driver a6810 4 allegro microsystems, inc. 115 northeast cutoff worcester, massachusetts 01615-0036 u.s.a. 1.508.853.5000; www.allegromicro.com limits @ v dd = 3.3 v limits @ v dd = 5 v characteristic symbol test conditions mln. typ. max. min. typ. max. units output leakage current i cex v out = 0 v ? <-0.1 -15 ? <-0.1 -15 a output voltage v out(1) i out = -25 ma 57.5 58.3 ? 57.5 58.3 ? v v out(0) i out = 1 ma ? 1.0 1.5 ? 1.0 1.5 v output pull-down current i out(0) v out = 5 v to v bb 2.5 5.0 ? 2.5 5.0 ? ma input voltage v in(1) 2.2 ? ? 3.3 ? ? v v in(0) ? ? 1.1 ? ? 1.7 v input current i in(1) v in = v dd ? <0.01 1.0 ? <0.01 1.0 a i in(0) v in = 0 v ? <-0.01 -1.0 ? <-0.01 -1.0 a input clamp voltage v ik i in = -200 a ? -0.8 -1.5 ? -0.8 -1.5 v serial data output volt age v out(1) i out = -200 a 2.8 3.05 ? 4.5 4.75 ? v v out(0) i out = 200 a ? 0.15 0.3 ? 0.15 0.3 v maximum clock frequency f c 10* ? ? 10* ? ? mhz logic supply current i dd(1) all outputs high ? 0.25 0.75 ? 0.3 1.0 ma i dd(0) all outputs low ? 0.25 0.75 ? 0.3 1.0 ma load supply current i bb(1) all outputs high, no load ? 1.5 3.0 ? 1.5 3.0 ma i bb(0) all outputs low ? 0.2 20 ? 0.2 20 a blanking -to- output delay t dis(bq) c l = 30 pf, 50% to 50% ? 0.7 2.0 ? 0.7 2.0 s t en(bq) c l = 30 pf, 50% to 50% ? 1.8 3.0 ? 1.8 3.0 s strobe -to- output delay t p(sth-ql) r l = 2.3 k , c l 30 pf ? 0.7 2.0 ? 0.7 2.0 s t p(sth-qh) r l = 2.3 k , c l 30 pf ? 1.8 3.0 ? 1.8 3.0 s output fall time t f r l = 2.3 k , c l 30 pf 2.4 ? 12 2.4 ? 12 s output rise time t r r l = 2.3 k , c l 30 pf 2.4 ? 12 2.4 ? 12 s output slew rate dv/dt r l = 2.3 k , c l 30 pf 4.0 ? 20 4.0 ? 20 v/ s clock -to- serial data out delay t p(ch-sqx) i out = 200 a ? 50 ? ? 50 ? ns negative current is de ned as coming out of (sourcing) the speci ed device terminal. typical data is is for design information only and is at t a = +25c. *operation at a clock frequency greater than the speci ed minimum value is possible but not warranteed. electrical characteristics at t a = +25c (a6810s-) or over op er at ing tem per a ture range (a6810e-), v bb = 60 v, logic supply operating voltage v dd = 3.0 to 5.5 v; un less otherwise noted
10-bit serial input latched source driver a6810 5 allegro microsystems, inc. 115 northeast cutoff worcester, massachusetts 01615-0036 u.s.a. 1.508.853.5000; www.allegromicro.com timing requirements and specifications (logic levels are v dd and ground) serial data present at the input is trans ferred to the shift register on the logic ?0? to logic ?1? transition of the clock input pulse. on suc ceed ing clock pulses, the registers shift data information towards the serial data output. the serial data must appear at the input prior to the rising edge of the clock input waveform. information present at any register is transferred to the respective latch when the strobe is high (serial-to-par al lel con ver sion). the latches will continue to accept new data as long as the strobe is held high. ap pli ca tions where the latches are bypassed (strobe tied high) will require that the blanking input be high during serial data entry. when the blanking input is high, the output source driv ers are disabled (off); the pnp active pull-down sink drivers are on. the in for ma tion stored in the latches is not affected by the blanking input. with the blank ing input low, the outputs are con trolled by the state of their re spec tive latches. blanking out n dwg. wp-030a data 10% 50% en(bq) t dis(bq) t high = all outputs blanked (disabled) r t f t 50% 90% a. data active time before clock pulse (data set-up time), t su(d) ........................................... 25 ns b. data active time after clock pulse (data hold time), t h(d) ................................................ 25 ns c. clock pulse width, t w(ch) ................................................. 50 ns d. time between clock ac ti va tion and strobe, t su(c) ......... 100 ns e. strobe pulse width, t w(sth) .............................................. 50 ns note ? timing is representative of a 10 mhz clock. higher speeds may be attainable; operation at high temperatures will reduce the speci ed maximum clock frequency. clock serial data in strobe blanking out n dwg. wp-029 50% serial data out data data 10% 90% 50% 50% 50% c a b d e low = all outputs enabled p(sth-ql) t p(ch-sqx) t data p(sth-qh) t
10-bit serial input latched source driver a6810 6 allegro microsystems, inc. 115 northeast cutoff worcester, massachusetts 01615-0036 u.s.a. 1.508.853.5000; www.allegromicro.com truth table serial shift register contents serial latch contents output con tents data clock data strobe input input i 1 i 2 i 3 ... i n-1 i n output input i 1 i 2 i 3 ... i n-1 i n blanklng i 1 i 2 i 3 ... i n-1 i n h h r 1 r 2 ... r n-2 r n-1 r n-1 l l r 1 r 2 ... r n-2 r n-1 r n-1 x r 1 r 2 r 3 ... r n-1 r n r n x x x ... x x x l r 1 r 2 r 3 ... r n-1 r n p 1 p 2 p 3 ... p n-1 p n p n h p 1 p 2 p 3 ... p n-1 p n l p 1 p 2 p 3 ... p n-1 p n x x x ... x x h l l l ... l l l = low logic level h = high logic level x = irrelevant p = present state r = previous state
10-bit serial input latched source driver a6810 7 allegro microsystems, inc. 115 northeast cutoff worcester, massachusetts 01615-0036 u.s.a. 1.508.853.5000; www.allegromicro.com package a 18-pin dip 5.33 max 0.46 0.12 22.86 0.51 6.35 +0.76 ?0.25 3.30 +0.51 ?0.38 10.92 +0.38 ?0.25 1.52 +0.25 ?0.38 7.62 2.54 0.25 +0.10 ?0.05 c seating plane 2 1 18 a dimensions exclusive of mold flash, gate burrs, and dambar protrusions exact case and lead configuration at supplier discretion within limits shown a terminal #1 mark area all dimensions nominal, not for tooling use (reference jedec ms-001 ac) dimensions in inches package lw 20-pin soicw 2 1 20 2 1 20 a 2.65 max c seating plane c 0.10 20x a terminal #1 mark area gauge plane seating plane b 2.25 0.65 9.50 1.27 pcb layout reference view for reference only dimensions in millimeters (reference jedec ms-013 ac) dimensions exclusive of mold flash, gate burrs, and dambar protrusions exact case and lead configuration at supplier discretion within limits shown b reference pad layout (reference ipc soic127p1030x265-20m) all pads a minimum of 0.20 mm from all adjacent pads; adjust as necessary to meet application process requirements and pcb layout tolerances 1.27 0.25 0.20 0.10 0.41 0.10 12.800.20 10.300.33 7.500.10 4 4 0.27 +0.07 ?0.06 0.84 +0.44 ?0.43
10-bit serial input latched source driver a6810 8 allegro microsystems, inc. 115 northeast cutoff worcester, massachusetts 01615-0036 u.s.a. 1.508.853.5000; www.allegromicro.com for the latest version of this document, visit our website: www.allegromicro.com copyright ?1998-2010, allegro microsystems, inc. the products described here are manufactured under one or more u.s. patents or u.s. patents pending. allegro microsystems, inc. reserves the right to make, from time to time, such de par tures from the detail spec i fi ca tions as may be required to per- mit improvements in the per for mance, reliability, or manufacturability of its products. before placing an order, the user is cautioned to verify that the information being relied upon is current. allegro?s products are not to be used in life support devices or systems, if a failure of an allegro product can reasonably be expected to cause the failure of that life support device or system, or to affect the safety or effectiveness of that device or system. the in for ma tion in clud ed herein is believed to be ac cu rate and reliable. how ev er, allegro microsystems, inc. assumes no re spon si bil i ty for its use; nor for any in fringe ment of patents or other rights of third parties which may result from its use.
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