unisonic technologies co.,ltd. UL316 linear integrated circuit www.unisonic.com.tw 1 of 5 copyright ? 2015 unisonic technologies co.,ltd qw-r125-032.c serial-interfaced 6-digit led controller ic with keyscan ? description the UL316 is a compact led contro ller and driver that interface microprocessors to led displays through a serial 3-wire interface. it drives led connected in common anode configuration. the UL316 drives up to 48 discrete leds in 8 segment/6 digit configuration while functioning from a supply voltage of 5.0v. sop-24 ? features * led driver with 14 outputs (8 segments/6 digits)40 ma load current capability for each segment * output pins connected dire ctly to the leds or can be open-drain * key-scanning (8 x 2 matrix) * 3-wire serial bus interface (clk, stb, din/dout) * 8-step dimming circuit to control the overall display brightness * single external resistor for output current setting * inputs with schmitt trigger give superior noise immunity * a single led digit output (dig1_led) can be used to drive up to 8 discrete leds * 8-step dimming circuit to control brightness of individual leds for led digit * 5.0 v ( 10%) for v cc * drives common-anode led digits * built-in power on reset and soft-start circuits ? ordering information ordering number package packing UL316g-s24-r sop-24 tape reel UL316g-s24-r (1)packing type (2)package type (1) r: tape reel (2) s24: sop-24 (3) g: halogen free and lead free (3)green package ? marking
UL316 linear integrated circuit unisonic technologies co., ltd 2 of 5 www.unisonic.com.tw qw-r125-032.c ? pin configurations ? pin configurations pin number symbol type name and function 1 din/dout in/out output serial data at fa lling edge of the shift clock, starting from lower bit. input serial data is clocked in at risi ng edge of the shift clock, starting from lower bit. 2 clk in reads serial data at rising edge, and outputs data at falling edge. 3 stb in initializes serial interface at rising or falling edge for reception of command. data input after the falling edge of stb are processed as a command. while command data are processed, current pr ocessing is stopped, and the serial interface is initialized. while stb is high, instructions are ignored. 4 irq_n out interrupt output (active low) to interrupt the mcu when there is a key press 5 dig1_led out single output led used together with the 8 segments to drive up to 8 discrete leds 6 dig2 out digit output pin 7 dig3 out digit output pin 8 dig4 out digit output pin 9 v cc pwr 5.0 v 10% core main supply voltage. bypass to gnd through a 0.1 f capacitor as close to the pin as possible 10 dig5 out digit output pin 11 dig6 out digit output pin 12 dig7 out digit output pin 13 seg8/ks8 out segment output pin (dual function as key source) 14 seg7/ks7 out segment output pin (dual function as key source) 15 seg6/ks6 out segment output pin (dual function as key source) 16 seg5/ks5 out segment output pin (dual function as key source) 17 gnd pwr connect this pin to system gnd 18 seg4/ks4 out segment output pin (dual function as key source) 19 seg3/ks3 out segment output pin (dual function as key source) 20 seg2/ks2 out segment output pin (dual function as key source) 21 seg1/ks1 out segment output pin (dual function as key source) 22 key2 in key 2 input 23 key1 in key 1 input 24 iset in segment current setting. connect to g nd through a resistor to set the peak s egment current.
UL316 linear integrated circuit unisonic technologies co., ltd 3 of 5 www.unisonic.com.tw qw-r125-032.c ? block diagram por ir generation current source serial i/f clock generation command decoder display memory timing generation key data memory 8-b output reg 7-b shift reg v cc internal reset irq_n iset output segments seg1/ks1 seg8/ks8 dig1_led dig2 dig7 din/dout clk stb key1 key2
UL316 linear integrated circuit unisonic technologies co., ltd 4 of 5 www.unisonic.com.tw qw-r125-032.c ? absolute maximum ratings (all voltages are referenced to gnd) parameter symbol values unit supply voltage to ground v cc -0.5 to +7 v logic input voltage v in -0.5 to v cc +0.5 v v power dissipation p d 1200 mw operating ambient temperature t a -40 ~ 85 c junction temperature t j 150 c storage temperature t stg -65 to +150 c note: de-rate at -9.6 mw/c at t a = 25c or higher. ? thermal data parameter symbol values unit junction to case jc 75 /w ? dc electrical characteristics dc electrical characteristics (t a = -40 to +85 c, v cc = 5.0 v 10%, gnd = 0 v) parameter symbol test conditions min typ max unit logic supply voltage v cc 4.5 5.0 5.5 v high level input voltage v ih high level guaranteed digital pins 0.57v cc v cc v low level input voltage v il low level guaranteed digital pins 0 0.3v cc v input current i ih , i il v in = v cc or gnd -2 2 a hysteresis voltage (din, clk, stb pins) v hys 1.05 v low level output voltage v ol ( dout ) d out , i ol2 =4ma 0.4 v segment drive led sink current i seg v led =2.5v, v digit =v cc ?1.0 -30 - 40 -50 ma digit drive led source current i dig v digit =v cc ?1.0 240 32 0 400 ma segment drive current matching i tolseg v cc =5.0v, t a =25c, v led =2.5 v 3 % external current setting reference resistor (precision = 1% tolerance) r set i seg =40ma 360 ? ? power supply characteristics (t a = -40 to +85 c, unless otherwise specified) parameter symbol test conditions min typ max unit quiescent power supply current i stby v cc =5.5v, all inputs=v cc or gnd 50 a operating power supply current (display on) i cc all segments on, all digits scanned, intensity set to full, internal oscillator, no display load connected 10 ma ? timing characteristics (t a = -40 ~ +85c, v cc =5.0v10%, typical values are at 25 c, unless otherwise specified) parameter symbol test conditions min typ max unit clock pulse width pw clk 400 ns strobe pulse width pw stb 1 s data setup time t setup 100 ns data hold time t hold clk rising edge to stb rising edge 100 ns clock-strobe time t clk-stb 1 s
UL316 linear integrated circuit unisonic technologies co., ltd 5 of 5 www.unisonic.com.tw qw-r125-032.c ? typical application circuit utc assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all utc products described or contained herein. utc products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expec ted to result in personal injury. reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. the information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.
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