0.56" 7-Segment Numeric LED Displays With MOS I.C. Driver LTM-8500 Series Package Dimensions 0.56 inch (14.22mm) digit height. Wide supply voltage operation. Serial data input. Constant Current drivers. Continuous brightness control. Solid state reliability-long operation life. Wide viewing angle. Choices of five bright colors/bright red/green/yellow/ red orange/high efficiency red. TTL compatible. A. LTM-8522 DISPLAYS Features Description The LTM-8500 series are 0.56 inch (14.22mm) numeric display modules, and a built-in M5450 MOS integrated circuits. The integrated circuit contains serial data input, 35 bits shift register. 34 LED driver output and a brightness control. The bright red yellow and green devices utilize LED chips which are made from GaP on a transparent GaP substrate. The red orange and high efficiency red devices utilize LED chips which are made from GaAsP on a transparent GaP substrate. The MOS integrated circuits are produced with N-channel silicon gate technology. Bright red displays have black face and red segments. Green and yellow displays have gray face and white segments. Red orange displays have orange face and orange segments. High efficiency red displays have red face and red segments. B. LTM-8529 C. LTM-8530 Notes: All dimensions are in millimeters (inches) Tolerance : 0.25mm (0.010") unless otherwise noted. 9-205 16-m8500.p65 Page 205 2000/7/11, UE 07:33 Adobe PageMaker 6.5C/Win Devices Part No. LTMBright Red Green Yellow 8522P 8522G 8522Y 8522E 8529P 8529G 8529Y 8529E 8530P 8530G 8530Y 8530E Description Pockage Dimension 8522HR 3 Digit, Rt. Hand Decimal A 8529HR 11/ 2 Digit, Rt. Hand Decimal B 8530HR 2 Digit, Rt. Hand Decimal C Red Orange Hi.-Eff. Red Pin Connection Connection Pin No. LTM-8522 LTM-8529 1 Vss Vss LTM-8530 Vss 2 V LED V LED VLED 3 V LED No Pin No Pin 4 Bit 25 Output No Pin No Pin 5 Bit 26 Output No Pin No Pin 6 Bit 27 Output Bit 15 Output Bit 17 Output 7 Bit 28 Output Bit 16 Output Bit 18 Output 8 Bit 29 Output Bit 17 Output Bit 19 Output 9 Bit 30 Output Bit 18 Output Bit 20 Output 10 Bit 31 Output Bit 19 Output Bit 21 Output 11 Bit 32 Output Bit 20 Output Bit 22 Output 12 Bit 33 Output Bit 21 Output Bit 23 Output 13 Bit 34 Output Bit 22 Output Bit 24 Output 14 Data Enable Data Enable Data Enable 15 Data Input Data Input Data Input 16 Clock Input Clock Input Clock Input 17 VDD VDD VDD 18 BRT. Control BRT. Control BRT. Control Absolute Maximum Ratings at Ta=25 Parameter Supply Voltage*1 Input Voltage Off State Output Voltage LED Supply Voltage Power Dissipation of IC*2 Symbol Min. Max. Unit VDD -0.3 12 V VI -0.3 12 V 12 V V O (off) 2.8 V LED PD(IC) 3.5 V 335 mW 8.5 mA Supply Current I DD Operating Temperature Range Top -20 +60 Storage Temperature Range Tstg -20 +60 Solder Temperature 1/16 Inch Below Seating Plane for 3 Seconds at 260 Note : 1. All voltages are with respect to Vss(GND) 2. Power dissipation of IC is given by P D =(V LED -V F) *V F is LED forward voltage. 9-206 (I F ) (No. of Segments)+(8.5mA) (V DD ) Recommended Operating Condition at Ta=25 Input Voltage Logical 0 Logical 1 Logical 1 Level Level Level Symbol Min. Max. Unit VDD 4.75 Typ. 11 V V V V mA Test Condition 10 A Input Bias 4.75V<VDD<5.25V VDD>5.25V VI -0.3 2.2 VDD -2 Brightness Input Current IB 0 0.8 VDD VDD 0.75 Brightness Input Voltage VB 3 4.3 V 11 V 10 IF=0 A IB=100 A IF=200 A 0.5 20 A mA mA MHZ % Max. Unit Test Condition Off State Voltage V O (off) Output Sink Current Segment Off Segment On Input Clock Frequency Output Matching 3 6 F CLOCK IO 0 Input Current =750 A Electrical/Optical Characteristics at Ta=25 DISPLAYS Parameter Supply Voltage LTM-8522P/8529P/8530P Parameter Average Luminous Intensity Peak Emission Wavelength Symbol Min. Typ. IV 320 950 P Spectral Line Half-Width Dominant Wavelength Luminous Intensity Matching Ratio d cd IB=0.4mA 697 nm IB=0.4mA 90 nm IB=0.4mA 657 nm I V-m 2:1 IF=20mA IB=0.4mA LTM-8522G/8529G/8530G Parameter Average Luminous Intensity Peak Emission Wavelength Symbol Min. Typ. IV 800 2400 P Spectral Line Half-Width Dominant Wavelength Luminous Intensity Matching Ratio d Max. Unit cd Test Condition IB=0.4mA 565 nm IB=0.4mA 30 nm IB=0.4mA 569 nm I V-m 2:1 IF=20mA IB=0.4mA LTM-8522Y/8529Y/8530Y Parameter Average Luminous Intensity Peak Emission Wavelength Symbol Min. Typ. IV 800 2400 P Spectral Line Half-Width Dominant Wavelength Luminous Intensity Matching Ratio d Max. Unit cd Test Condition IB=0.4mA 585 nm IB=0.4mA 35 nm IB=0.4mA 588 nm I V-m 2:1 IF=20mA IB=0.4mA LTM-8522E/8529E/8530E Parameter Average Luminous Intensity Peak Emission Wavelength Symbol Min. Typ. IV 800 2400 P Spectral Line Half-Width Dominant Wavelength Luminous Intensity Matching Ratio d I V-m Max. Unit cd Test Condition IB=0.4mA 630 nm IB=0.4mA 40 nm IB=0.4mA 621 nm 2:1 IF=20mA IB=0.4mA 9-207 LTM-8522HR/8529HR/8530HR Parameter Average Luminous Intensity Peak Emission Wavelength Symbol Min. Typ. IV 800 2400 P Spectral Line Half-Width d Dominant Wavelength Luminous Intensity Matching Ratio I V-m Max. Unit cd Test Condition IB=0.4mA 635 nm IB=0.4mA 40 nm IB=0.4mA 623 nm 2:1 IF=20mA IB=0.4mA Note: Luminous intensity is measured with a light sensor and filter combination that approximates the CIE (Commision Internationale De L'Eclairage) eye-response curve. Functional Description Serial data transfer from the data source to the display driver is accomplished with 2 signals serial data and clock. Using a format of a leading "1" followed by the 35 data bits allow data transfer without an additional load signal. The 35 data bits are latched after the 36th bit is completed, thus providing non multiplexed, direct drive to the display. Outputs change only if the serial data bits differ from the previous time. Brightness of display is determined by control the output current of LED display. A 1nF capacitor should be connected to brightness control, Pin 7 to prevent possible oscillations. The output current is typically 25 times greater than the current into Pin 7 which is set by an external variable resistor. There is an internal limiting resistor of 400 nominal value. Figure 1 shows the input data format. A start bit of logical "1" preceed the 35 bits of data. At the 36th clock, a LOAD signal is generated synchronously with the high state of the clock, which loads the 35 bits of the shift registers into the latches. At the low state of the clock a RESET signal is generated which clears all the shift registers for the next set of data . The shift registers are static master-slave configuration. There is no clear for master portion of the first register, thus allowing continuous operation. There must be a complete set of 36 clocks or the shift registers won't clear. When power is first applied to the chip, an internal power ON, a reset signal is generated which reset all registers and all latches. The START bit and first clock return the chip on its normal operation. Bit 1 is the first following the start bit and it will appear on the segment A of the digit 1. A logical "1" at the input will turn on the appropriate LED. Figure 2 shows the timing relationship between data, clock, and DATA ENABLE. A max. clock frequency of 0.5MHz is assumed. Figure 1. Internal Block Diagram 9-208 Figure 2. Input Data Format Table I Serial Data Input Sequence Bit Digit LTM-8522 Segment Digit LTM-8529 Segment Digit LTM-8530 Segment 1 1 A 1 B 1 2 1 B 1 C 1 B 3 1 C 1 G 1 C 4 1 D 1 H 1 D 5 1 E 1 J 1 E 6 1 F 1 D.P. 1 F 7 1 G 2 A 1 G 8 1 D.P. 2 B 1 D.P. 9 2 A 2 C 2 A 10 2 B 2 D 2 B 11 2 C 2 E 2 C 12 2 D 2 F 2 D 13 2 E 2 G 2 E 14 2 F 2 D.P. 2 F 15 2 G Pin 6 2 G 16 2 D.P. Pin 7 2 17 3 A Pin 8 Pin 6 18 3 B Pin 9 Pin 7 19 3 C Pin 10 Pin 8 20 3 D Pin 11 Pin 9 21 3 E Pin 12 Pin 10 22 3 F Pin 13 Pin 11 23 3 G No Connection Pin 12 24 3 D.P. No Connection Pin 13 25 Pin 4 No Connection No Connection 26 Pin 5 No Connection No Connection 27 Pin 6 No Connection No Connection 28 Pin 7 No Connection No Connection 29 Pin 8 No Connection No Connection 30 Pin 9 No Connection No Connection 31 Pin 10 No Connection No Connection 32 Pin 11 No Connection No Connection 33 Pin 12 No Connection 34 Pin 13 No Connection No Connection No Connection DISPLAYS Figure 3. Timing Relationship A D.P. 9-209 Typical Application A. 1 1/2 DIGIT DISPLAY B. 2 DIGIT DISPLAY C. 2 1/2 DIGIT DISPLAY D. 3 DIGIT DISPLAY E. 3 1/2 DIGIT DISPLAY F. 4 DIGIT DISPLAY NOTES:1.Clean only in water,isopropanol, ethanol,freon TF(or equivalent). 2.Luminous intensity is measured with a light sensor and filter combination thar approximates the CIE (Commision lnternationale De L'Eclairage)eye-response curve. 9-210 16-m8500.p65 Page 210 2000/7/11, UE 07:34 Adobe PageMaker 6.5C/Win