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? 2007 by catalyst semiconductor, inc. characteristics subject to change without notice doc. no. 22 , rev. c cat5120, cat5121, cat5122 16-tap minipot? digitally programmable potentiometers with 2-wire interface for ordering information details, see page 10. fe atures 0.3a ultra-low supply current single-supply operation: 2.7v to 5.5v glitchless switching between resistor taps power-on reset to midscale 2-wire up/down serial interface resistance values: 10k, 50k and 100k available in sc70 and s ot-23 packages description cat5 20/5 2 /5 22 linear-taper digitally programmable potentiometers perform the same function as a mechanical potentiometer or a variable resistor. these devices consist of a fxed resistor and a wiper contact with 6-tap points that are digitally controlled through a 2-wire up/down serial interface. the cat5120 is confgured as a potentiometer. the cat5121 and cat5122 are confgured as variable resistors. see pin confgurations for part functionality. three resistance values are available: 10k, 50k and 100k. these are available in space-saving 5-pin and 6-pin sc70 and sot-23 packages. pin configur ation gnd cs u/d h v dd 2 ca t5122 gnd cs u/d 6 5 3 4 h v dd v dd 2 3 4 w 5 ca t5120 sc70 sot -23 sc70 sot -23 sc70 sot -23 gnd cs u/d 6 h 2 l 5 ca t5121 3 4 functiona l diagram pin descriptions name description v dd power supply gnd ground u/ d up/ down control input. with cs low, a low- to-high transition increments or decrements the wiper position. cs chip select input. a high-to-low cs transition determines the mode: increment if u/ d is high, or decrement if u/ d is low. l low terminal of resistor w wiper terminal of resistor h high terminal of resistor 16-position decoder up-down counter u/d v dd gnd h l w cs appl ications lcd screen adjustment volume control mechanical potentiometer replacement gain adjustment line impedance matching
cat5120, cat5121, cat5122 2 doc. no. 22 , rev. c ? 2007 by catalyst semiconductor, inc. characteristics subject to change without notice absolute maximum ratings (1) v dd to gnd -0.3v to +6v all other pins to gnd -0.3v to (v dd + 0.3)v input and output latch-up immunity 200ma max imum continuous current into h, l and w 100k 50k 10k 0.6ma .3ma .3ma continuous power dissipation (t a = +70oc) 5-pin sc70 (2) 6-pin sc70 (2) 247mw 245mw operating temperature range -40oc to +85oc junction temperature +50oc storage temperature range -65oc to +50oc soldering temperature (soldering, 0s) +300oc notes: (1) stresses above those listed under absolute maximum ratings may cause permanent damage to the device. these are stress ratings only, and functional operation of the device at these or any other conditions outside of those listed in the operational sections of this specifcation is not implied. exposure to any absolute maximum rating for extended periods may af fect device performance and reliability. (2) derate 3. mw/oc above t a = +70oc electrica l characteristics v dd = 2.7v to 5.5v, v h = v dd , v l = 0, t a = -40oc to 85oc. typical values are at v dd = 2.7v, t a = 25oc, unless otherwise noted. parameter symbol conditions min typ max units dc performance resolution 6 taps end-to-end resistance (-00) 75 00 25 k end-to-end resistance (-50) 37.5 50 62.5 end-to-end resistance (-0) 7.5 0 2.5 end-to-end resistance tempco tc r 200 ppm/oc ratiometric resistance tempco 5 ppm/oc integral nonlinearity inl 0.5 lsb differential nonlinearity dnl 0.5 lsb zero/full-scale error 0. 0.5 lsb wiper resistance r w 200 600 digital inputs input high voltage v ih 0.7 x v dd v input low voltage v il 0.3 x v dd v
cat5120, cat5121, cat5122 3 doc no. 22 , rev. c ? 2007 by catalyst semiconductor, inc. characteristics subject to change without notice typica l oper ating characteristics t a = 25oc, unless otherwise noted. v dd = 5.5v v dd = 2.7v 0 8 4 1 2 1 6 2 0 2 4 wiper position v dd = 2.7v 28 32 50k v dd = 5.5v electrica l characteristics (continued) v dd = 2.7v to 5.5v, v h = v dd , v l = 0, t a = -40oc to 85oc. typical values are at v dd = 2.7v, t a = 25oc, unless otherwise noted. parameter symbol conditions min typ max units timing characteristics (figures 1, 2) u/ d mode to cs setup t cu 25 ns cs to u/ d step setup t ci 50 ns cs to u/ d step hold t ic 25 ns u/ d step low period t il 25 ns u/ d step high period t ih 25 ns up/ down toggle rate () f toggle mhz output settling time (2) t settle 100k variable resistor confguration, cl = 10pf s 100k potentiometer confguration, cl = 10pf 0.25 power supply supply voltage v dd 2.7 5.5 v active supply current (3) i dd 25 a standby supply current (4) i sd v dd = +5v 0.3 a notes: ( ) up/down toggle rate: f toggle = /t settle (2) typical setting times are dependant on end-to-end resistance. (3) supply current taken while changing wiper tap, f toggle = mhz. (4) supply current taken while wiper position is fxed.
cat5120, cat5121, cat5122 4 doc. no. 22 , rev. c ? 2007 by catalyst semiconductor, inc. characteristics subject to change without notice cs u/ d w t cu t il t ih t settle t ic t ci t settle note: "w" is not a digital signal. it represents wiper transitions. functiona l description the cat5120/5121/5122 consist of a fxed resistor and a wiper contact with 6-tap points that are digitally controlled through a 2-wire up/down serial interface. three end-to-end resistance values are available: 10k, 50k and 100k. the cat5 20 is designed to operate as a potentiometer. in this confguration, the low terminal of the resistor array is connected to ground (pin 2). the cat5 22 performs as a variable resistor. in this device, the wiper terminal and high terminal of the resistor array is connected at pin 5. the cat5 2 is a similar variable resistor, except the low terminal is connected to pin 5. d igita l inter face oper ation the minipots have two modes of operation when the serial interface is active: increment and decrement mode. the serial interface is only active when cs is low. figure 2. s erial interface timing diagram, decrement mode figure 1. s erial interface timing diagram, increment mode the cs and u/ d inputs control the position of the wiper along the resistor array. when cs transitions from high to low, the part will go into increment mode if u/ d input is high, and into decrement mode when u/ d input is low. once the mode is set, the device will remain in that mode until cs goes high again. a low-to-high transition at the u/ d pin will increment or decrement the wiper position depending on the current mode (figures and 2). when the cs input transitions to high (serial interface inactive), the value of the counter is stored and the wiper position is maintained. note that when the wiper reaches the maximum (or minimum) tap position, the wiper will not wrap around to the minimum (or maximum) position. power-on reset all parts in this family feature power-on reset (por) circuitry that sets the wiper position to midscale at power- up. by default, the chip is in the increment mode. cs u/ d w t cu t il t ih t ic t settle t ci t settle note: "w" is not a digital signal. it represents wiper transitions.
cat5120, cat5121, cat5122 5 doc no. 22 , rev. c ? 2007 by catalyst semiconductor, inc. characteristics subject to change without notice appl ications infor mation the minipots are intended for circuits requiring digitally controlled adjustable resistance, such as lcd contrast control, where voltage biasing adjusts the display contrast. al tern ative positive lcd bias control use an op amp to provide buffering and gain on the output of the cat5 20. connect the mechanical potentiometer to the positive input of a noninverting op amp (figure 3) to select a portion of the input signal by digitally controlling the wiper terminal. figure 4 shows a similar circuit for the cat5 2. figure 3. positive lcd bias control figure 4. positive lcd bias control adjus table gain figure 5 shows how to use the variable resistor to digitally adjust the gain of a noninverting op amp confguration. connect the cat5 2 in series with a resistor to ground to form the adjustable gain control of a noninverting amplifer. the minipots have a low 5ppm/c ratiometric tempco that allows for a very stable adjustable gain confguration over temperature. 30v w l h +5v v out 30v l h +5v v out v cc l h v in v out v cc l h w v in v out ca t51 20 ca t51 21 ca t51 21 ca t51 20 figure 5a. adjustable gain circuit figure 5b. adjustable gain circuit
cat5120, cat5121, cat5122 6 doc. no. 22 , rev. c ? 2007 by catalyst semiconductor, inc. characteristics subject to change without notice notes: 1. dimension are in mm. 2. dimension are inclusive of planting. 3. dimension are exclusive of mold flash & metal burr . 4. all specification comply to jdec m0-203 sc-70 6 lead e e b e1 no m m ax 1.10 0.10 1.00 0.30 0.25 0.46 8 sy mb ol a a1 a2 b c d e e1 e l l1 l2 mi n 0.00 0.80 0.70 0.15 0.08 0.26 0.36 0 0.42 re f 0.15 bs c 0.65 bs c 1.25 bs c 2.10 bs c 2.00 bs c 0.90 0.20 d a2 a a1 l l1 l2 gauge plan e c p ackage infor mation for current tape and reel information, download the pdf fle from: www.catsemi.com/documents/tapeandreel.pdf
cat5120, cat5121, cat5122 7 doc no. 22 , rev. c ? 2007 by catalyst semiconductor, inc. characteristics subject to change without notice notes: (1) dimension are in millimeter . (2) all specification comply to jdec m0-203 sc-70 5 lead e e b e1 no m m ax 1.10 0.10 1.00 0.30 0.18 0.46 8 sy mb ol a a1 a2 b c d e e1 e l l1 l2 mi n 0.00 0.80 0.80 0.15 0.10 0.26 0.36 0 0.42 re f 0.15 bs c 0.65 bs c 2.10 1.25 2.00 1.80 1.15 1.80 2.40 1.35 2.20 d a2 a a1 l l1 l2 gauge plan e c for current tape and reel information, download the pdf fle from: www.catsemi.com/documents/tapeandreel.pdf
cat5120, cat5121, cat5122 8 doc. no. 22 , rev. c ? 2007 by catalyst semiconductor, inc. characteristics subject to change without notice top view side view end view package information sot-23 6 lead doc. no. 139 / 031607 symbol min nom max a 0.90 1.45 a1 0.00 0.15 a2 0.90 1.30 b 0.30 0.50 c 0.08 0.22 d 2.90 bsc e 2.80 bsc e1 1.60 bsc e 0.95 bsc l 0.30 0.45 0.60 l1 0.60 ref l2 0.25 bsc 0 8 1 10 2 10 notes: (1) all dimensions in millimeters. angles in degrees. (2) complies with jedec standard mo-178. for current tape and reel information, download the pdf fle from: www.catsemi.com/documents/tapeandreel.pdf
cat5120, cat5121, cat5122 doc no. 22 , rev. c ? 2007 by catalyst semiconductor, inc. characteristics subject to change without notice top view side view end view package information sot-23 5 lead doc. no. 111 / 031607 symbol min nom max a 0.90 1.45 a1 0.00 0.15 a2 0.90 1.30 b 0.30 0.50 c 0.08 0.22 d 2.90 bsc e 2.80 bsc e1 1.60 bsc e 0.95 bsc l 0.30 0.45 0.60 l1 0.60 ref l2 0.25 bsc 0 8 1 10 2 10 notes: (1) all dimensions in millimeters. angles in degrees. (2) complies with jedec standard mo-178. for current tape and reel information, download the pdf fle from: www.catsemi.com/documents/tapeandreel.pdf
cat5120, cat5121, cat5122 0 doc. no. 22 , rev. c ? 2007 by catalyst semiconductor, inc. characteristics subject to change without notice example of ordering infor mation prefix device # suffix 5120 cat sd -10 i -g product number 5120 5121 5122 package sd: sc70 tb: sot-23 resistance -10: 10k -50: 50k -00: 100k company id temperature range i = industrial (-40c to 85c) lead finish blank: matte-tin g: nipdau t10 tape & reel t: tape & reel 3: 3000/reel 10: 10000/reel notes: () all packages are rohs-compliant (lead-free, halogen-free). (2) the standard lead fnish is nipdau. (2) the device used in the example above is a cat5120sdi-10-gt10 (sc70, industrial temperature range, nipdau, tape and reel). (3) for additional package and temperature options, please contact your nearest catalyst semiconductor sales offce.
cat5120, cat5121, cat5122 doc no. 22 , rev. c ? 2007 by catalyst semiconductor, inc. characteristics subject to change without notice ordering infor mation part number resistor [k] package marking pin package quantity per reel cat5 20sdi-0-gt3 0 kc_ sc70-6 3,000 cat5 20sdi-0-gt0 0 kc_ sc70-6 0,000 cat5 20tbi-0-t3 0 kcym sot23-6 3,000 cat5 20tbi-0-t0 0 kcym sot23-6 0,000 cat5 20tbi-0-gt3 0 kcym sot23-6 3,000 cat5 20tbi-0-gt0 0 kcym sot23-6 0,000 cat5 20sdi-50-gt3 50 kd_ sc70-6 3,000 cat5 20sdi-50-gt0 50 kd_ sc70-6 0,000 cat5 20tbi-50-t3 50 kdym sot23-6 3,000 cat5 20tbi-50-t0 50 kdym sot23-6 0,000 cat5 20tbi-50-gt3 50 kdym sot23-6 3,000 cat5 20tbi-50-gt0 50 kdym sot23-6 0,000 cat5 20sdi-00-gt3 00 ke_ sc70-6 3,000 cat5 20sdi-00-gt0 00 ke_ sc70-6 0,000 cat5 20tbi-00-t3 00 keym sot23-6 3,000 cat5 20tbi-00-t0 00 keym sot23-6 0,000 cat5 20tbi-00-gt3 00 keym sot23-6 3,000 cat5 20tbi-00-gt0 00 keym sot23-6 0,000 cat5 2sdi-0-gt3 0 kf_ sc70-6 3,000 cat5 2sdi-0-gt0 0 kf_ sc70-6 0,000 cat5 2tbi-0-t3 0 kfym sot23-6 3,000 cat5 2tbi-0-t0 0 kfym sot23-6 0,000 cat5 2tbi-0-gt3 0 kfym sot23-6 3,000 cat5 2tbi-0-gt0 0 kfym sot23-6 0,000 cat5 2sdi-50-gt3 50 kg_ sc70-6 3,000 cat5 2sdi-50-gt0 50 kg_ sc70-6 0,000 cat5 2tbi-50-t3 50 kgym sot23-6 3,000 cat5 2tbi-50-t0 50 kgym sot23-6 0,000 cat5 2tbi-50-gt3 50 kgym sot23-6 3,000 cat5 2tbi-50-gt0 50 kgym sot23-6 0,000 cat5 2sdi-00-gt3 00 kh_ sc70-6 3,000 cat5 2sdi-00-gt0 00 kh_ sc70-6 0,000 cat5 2tbi-00-t3 00 khym sot23-6 3,000 cat5 2tbi-00-t0 00 khym sot23-6 0,000 cat5 2tbi-00-gt3 00 khym sot23-6 3,000 cat5 2tbi-00-gt0 00 khym sot23-6 0,000
cat5120, cat5121, cat5122 2 doc. no. 22 , rev. c ? 2007 by catalyst semiconductor, inc. characteristics subject to change without notice ordering infor mation (continue) part number resistor [k] package marking pin package quantity per reel cat5 22sdi-0-gt3 0 ky_ sc70-5 3,000 cat5 22sdi-0-gt0 0 ky_ sc70-5 0,000 cat5 22tbi-0-t3 0 kyym sot23-5 3,000 cat5 22tbi-0-t0 0 kyym sot23-5 0,000 cat5 22tbi-0-gt3 0 kyym sot23-5 3,000 cat5 22tbi-0-gt0 0 kyym sot23-5 0,000 cat5 22sdi-50-gt3 50 ka_ sc70-5 3,000 cat5 22sdi-50-gt0 50 ka_ sc70-5 0,000 cat5 22tbi-50-t3 50 kaym sot23-5 3,000 cat5 22tbi-50-t0 50 kaym sot23-5 0,000 cat5 22tbi-50-gt3 50 kaym sot23-5 3,000 cat5 22tbi-50-gt0 50 kaym sot23-5 0,000 cat5 22sdi-00-gt3 00 kb_ sc70-5 3,000 cat5 22sdi-00-gt0 00 kb_ sc70-5 0,000 cat5 22tbi-00-t3 00 kbym sot23-5 3,000 cat5 22tbi-00-t0 00 kbym sot23-5 0,000 cat5 22tbi-00-gt3 00 kbym sot23-5 3,000 cat5 22tbi-00-gt0 00 kbym sot23-5 0,000
catalyst semiconductor, inc. corporate headquarters 2 75 stender way santa clara, ca 5054 phone: 408.542.000 fax: 408.542.1200 www.catsemi.com copyrights, trademarks and patents trademarks and registered trademarks of catalyst semiconductor include each of the following: beyond memory ?, dpp ?, ezdim?, minipot? and quad mode? catalyst semiconductor has been issued u.s. and foreign patents and has patent applications pending that protect its products. catalyst semiconductor makes no warranty, representation or guarantee, express or implied, regarding the suitability of its products for any particular purpose, nor that the use of its products will not infringe its intellectual property rights or the rights of third parties with respect to any particular use or application and specifically disclaims any and all liability arising out of any such use or application, including but not limited to, consequential or incidental damages. catalyst semiconductor products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the catalyst semiconductor product could create a situation where personal injury or death may occur. catalyst semiconductor reserves the right to make changes to or discontinue any product or service described herein without notice. products with data sheets labeled advance information or preliminary and other products described herein may not be in production or offered for sale. catalyst semiconductor advises customers to obtain the current version of the relevant product information before placing orders. circuit diagrams illustrate typical semiconductor applications and may not be complete. document no: 22 revision: c issue date: 03/2/07 revision his to ry date r ev. reason 03/0/2005 a initial issue 0/27/2006 b update electrical characteristics 03/2/2007 c update ordering information update package outlines add example of ordering information add sot-23 5 lead package drawing update sot-23 6 lead package drawing

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