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january 2009 rev 2 1/14 14 uln2064b, uln2066b ULN2068B, uln2074b 50 v - 1.5 a quad darlington switches features output current to 1.5 a for each darlington minimum breakdown 50 v sustaining voltage at least 35 v integral suppression diodes (uln2064b, uln2066b and ULN2068B isolated darlington pinout (uln2074b) versions compatible with all popular logic families description designed to interface logic to a wide variety of high current, high voltage loads, these devices each contain four npn darlington switches delivering up to 1.5 a with a specified minimum breakdown of 50 v and a sustaining voltage of 35 v measured at 100 ma. the uln2064b, uln2066b and ULN2068B contain integral suppression diodes for inductive loads have common emitters. the uln2074b feature isolated darlington pinouts and is intended for applications such as emitter follower configurations. inputs of the uln2064b, ULN2068B and uln2074b are compatible with popular 5 v logic familie s and the uln2066b are compatible with 6 - 15 v cmos and pmos. type ULN2068B includes a pre-driver stage to reduce loading on the control logic. powerdip-16 table 1. device summary part numbers package uln2064b powerdip-16 uln2066b powerdip-16 ULN2068B powerdip-16 uln2074b powerdip-16 www.st.com
contents uln2064b, uln2066b, ULN2068B, uln2074b 2/14 contents 1 diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 test circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 6 mounting instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 7 typical applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 8 package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 9 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
uln2064b, uln2066b, ULN2068B, uln2074b diagram 3/14 1 diagram figure 1. schematic diagrams ULN2068B: r in = 2.5k , r s = 900 uln2074b: r in = 350 uln2066b: r in = 3k uln2064b: r in = 350
pin configuration uln2064b, uln2066b, ULN2068B, uln2074b 4/14 2 pin configuration figure 2. pin connections (top view) ULN2068B uln2066b uln2074b uln2064b
uln2064b, uln2066b, ULN2068B, uln2074b maximum ratings 5/14 3 maximum ratings table 2. absolute maximum ratings symbol parameter value unit v cex output voltage 50 v v ce(sus) output sustaining voltage 35 v i o output current 1.75 a v i input voltage uln2066b - 2074b 30 v input voltage uln2064b - 2068b 15 i i input current 25 ma v s supply voltage for ULN2068B 10 v p tot power dissipation at t pins = 90 c 4.3 w power dissipation at t amb = 70 c 1 t amb operating ambient temperature range - 20 to 85 c t stg storage temperature - 55 to 150 c
electrical characteristics uln2064b, uln2066b, ULN2068B, uln2074b 6/14 4 electrical characteristics note: input voltage is with reference to the substrate (no connection to any other pins) for the uln2074b reference is ground for all other types. note: 1 input current may be limited by maximum allowable input voltage. table 3. electrical characteristics (t a = 25 c unless otherwise specified). symbol parameter test cond ition min. typ. max. unit i cex output leakage current ( figure 5 ) v ce = 50v, t a = 25c 100 a v ce = 50v, t a = 70c 500 v ce(sus) collector-emitter sustaining voltage ( figure 4 ) i c = 100ma, v i = 0.4v 35 v v ce(sat) collector-emitter saturation voltage ( figure 5 ) i c = 500ma, i b = 325a 1.1 v i c = 750ma, i b = 935a 1.2 i c = 1a, i b = 1.25ma 1.3 i c = 1.25a, i b = 2ma 1.4 i i(on) input current ( figure 6 ) for uln2064b and uln2074b v i = 2.4v v i = 3.75v 1.4 3.3 4.3 9.6 ma for uln2066b, v i = 5v v i = 12v 0.6 1.7 1.8 5.2 for ULN2068B, v i = 2.75v v i = 3.75v 0.55 1.0 v i(on) input voltage ( figure 7 ) v ce = 2v, i c = 1a uln2064b, uln2074b, uln2066b v ce = 2v, i c = 1.5a uln2064b, uln2074b, uln2066b ULN2068B 2 6.5 2.5 10 2.75 v i s supply current ( figure 10 ) for ULN2068B, v i = 2.75v, i c = 500ma 6ma t plh turn-on delay time 0.5 v i to 0.5v o 1s t phl turn-off delay time 0.5 v i to 0.5v o 1.5 s i r clamp diode leakage current ( figure 8 ) for uln2064b - uln2066b - ULN2068B, v r = 50v t a = 25c t a = 70c 50 100 a v f clamp diode forward voltage ( figure 9 ) for uln2064b - uln2066b - ULN2068B i f = 1a i f = 1.5a 1.75 2 v
uln2064b, uln2066b, ULN2068B, uln2074b test circuits 7/14 5 test circuits figure 3. output leakage current figure 4. collector-emitter sustaining voltage figure 5. collector-emitter saturation voltage figure 6. input current (on) figure 7. input voltage figure 8. clamp diode leakage current
test circuits uln2064b, uln2066b, ULN2068B, uln2074b 8/14 figure 9. clamp diode forward voltage figure 10. supply current figure 11. input current as a function of input voltage figure 12. input current as a function of input voltage figure 13. collector current as a function of input current
uln2064b, uln2066b, ULN2068B, uln2074b mounting instructions 9/14 6 mounting instructions the r thja can be reduced by soldering the gnd pins to a suitable copper area of the printed circuit board ( figure 14 ) or to an external heatsink ( figure 15 ). the diagram of figure 16 shows the maximum dissipated power p tot and the r thja as a function of the side " " of two equal square copper areas having a thickness of 35 (1.4 mils). during soldering the pins temperature must not exceed 260 c and the soldering time must not be longer than 12 seconds. the external heatsink or printed circuit coppe r area must be connected to electrical ground. figure 14. example of p.c. board area which is used as heatsink figure 15. external heatsink mounting example figure 16. maximum dissipated power and junction to ambient thermal resistance vs. side " " figure 17. maximum allowable power dissipation vs. ambient temperature
typical applications uln2064b, uln2066b, ULN2068B, uln2074b 10/14 7 typical applications figure 18. common-anode led drivers figure 19. common-cathode led drivers
uln2064b, uln2066b, ULN2068B, uln2074b package mechanical data 11/14 8 package mechanical data in order to meet environmental requirements, st offers these devices in different grades of ecopack? packages, depending on their level of environmental compliance. ecopack? specifications, grade definitions and product status are available at: www.st.com. ecopack? is an st trademark.
package mechanical data uln2064b, uln2066b, ULN2068B, uln2074b 12/14 dim. mm inch. min. typ. max. min. typ. max. a 1 0.51 0.020 b0. 8 5 1.40 0.0 33 0.055 b 0.50 0.020 b 10. 38 0.50 0.015 0.020 d 20.0 0.7 8 7 e 8 . 8 00. 3 46 e 2.54 0.100 e 3 17.7 8 0.700 f 7.10 0.2 8 0 i 5.10 0.201 l 3 . 3 00.1 3 0 z 1.27 0.050 powerdip-16 outline and mechanical data
uln2064b, uln2066b, ULN2068B, uln2074b revision history 13/14 9 revision history table 4. document revision history date revision changes 12-sep-2003 1 first release 22-jan-2009 2 modified table 1 on page 1 .
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