LED Display Product Data Sheet LTM-8522G Spec No.: DS-30-98-326 Effective Date: 06/23/2000 Revision: - LITE-ON DCC RELEASE BNS-OD-FC001/A4 LITE-ON Technology Corp. / Optoelectronics No.90,Chien 1 Road, Chung Ho, New Taipei City 23585, Taiwan, R.O.C. Tel: 886-2-2222-6181 Fax: 886-2-2221-1948 / 886-2-2221-0660 http://www.liteon.com/opto LITE-ON ELECTRONICS, INC. Property of Lite-On Only FEATURES ＊0.56-INCH (14.22-mm) DIGIT HEIGHT. ＊WIDE SUPPLY VOLTAGE OPERATION. ＊SERIAL DATA INPUT. ＊CONSTANT CURRENT DRIVERS. ＊CONTINUOUS BRIGHTNESS CONTROL. ＊SOLID STATE RELIABILITY-LONG OPERATION LIFE. ＊WIDE VIEWING ANGLE. ＊TTL COMPATIBLE. DESCRIPTION The LTM-8522G is a 0.56-inch (14.22-mm) 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. This device utilizes green LED chips, which are made from GaP on a transparent GaP substrate, and has a gray face and white segments. The MOS integrated circuits are produced with N-channel silicon gate technology. DEVICE PART NO. DESCRIPTION GREEN 3 Digit Rt. Hand Decimal LTM-8522G PART NO.: LTM-8522G BNS-OD-C131/A4 PAGE: 1 of 8 LITE-ON ELECTRONICS, INC. Property of Lite-On Only PACKAGE DIMENSIONS NOTES: All dimensions are in millimeters. Tolerances are 0.25-mm (0.01“) unless otherwise noted. PART NO.: LTM-8522G BNS-OD-C131/A4 PAGE: 2 of 8 LITE-ON ELECTRONICS, INC. Property of Lite-On Only PIN CONNECTION PART NO.: LTM-8522G BNS-OD-C131/A4 No. CONNECTION 1 VSS 2 VLED 3 VLED 4 BIT 25 OUTPUT 5 BIT 26 OUTPUT 6 BIT 27 OUTPUT 7 BIT 28 OUTPUT 8 BIT 29 OUTPUT 9 BIT 30 OUTPUT 10 BIT 31 OUTPUT 11 BIT 32 OUTPUT 12 BIT 33 OUTPUT 13 BIT 34 OUTPUT 14 DATA ENABLE 15 DATA INPUT 16 CLOCK INPUT 17 VDD 18 BRT. CONTROL PAGE: 3 of 8 LITE-ON ELECTRONICS, INC. Property of Lite-On Only ABSOLUTE MAXIMUM RATING AT TA=25oC PARAMETER Supply Voltage *1 Input Voltage Off State Output Voltage Symbol Min. Max. UNIT VDD -0.3 12 V VI -0.3 12 V 12 V 3.5 V VO(off) LED Supply Voltage VLED Power Dissipation of IC *2 PD(IC) 335 mW Supply Current IDD 8.5 mA Operating Temperature Range Top Storage Temperature Range 2.8 -20 Tstg -20 +60 0 C +60 0 C Solder Temperature 1/16 inch Below Seating Plane for 3 Seconds at 2600C RECOMMENDED OPERATING CONDITION AT TA=25oC Parameter Symbol Min. Supply Voltage VDD Max. Unit 4.75 11 V VI -0.3 2.2 VDD -2 0.8 VDD VDD V V V Brightness Input Current IB 0 0.75 mA Brightness Input Voltage VB 3 4.3 V Off State Voltage VO(off) 11 V 10 μA Input Voltage Logical “0” Level Logical “1” Level Logical “1” Level Typ. Test Condition ±10µA Input Bias 4.75V < VDD < 5.25V VDD > 5.25V Input Current=750μA Output Sink Current Segment Off Segment On 3 6 Input Clock Frequency FCLOCK Output Matching IO 0 0.5 ±20 mA mA MHZ IB=0 µA IB=100 µA IB=200 µA % Note: Luminous intensity is measured with a light sensor and filter combination that approximates the CIE (Commision Internationale De L’Eclairage) eye-response curve. PART NO.: LTM-8522G BNS-OD-C131/A4 PAGE: 4 of 8 LITE-ON ELECTRONICS, INC. Property of Lite-On Only ELECTRICAL/OPTICAL CHARACTERISTICS AT Ta=25℃ PARAMETER SYMBOL MIN. TYP. MAX. UNIT TEST CONDITION 2400 cd IB=0.4mA p 565 nm IB=0.4mA Spectral Line Half-Width 30 nm IB=0.4mA Dominant Wavelength d 569 nm IF=20mA Average Luminous Intensity IV Peak Emission Wavelength Luminous Intensity Matching Ratio FUNCTIONAL IV-m 800 2:1 IB=0.4mA 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 Ω nominal value. Figure 1 shows the input data format. A start bit of logical “1” proceed 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 0.5 MHz is assumed. PART NO.: LTM-8522G BNS-OD-C131/A4 PAGE: 5 of 8 LITE-ON ELECTRONICS, INC. Property of Lite-On Only FIGURE 1. INTERNAL BLOCK DIAGRAM FIGURE 2. INPUT DATA FORMAT FIGURE 3. TIMING RELATIONSHIP PART NO.: LTM-8522G BNS-OD-C131/A4 PAGE: 6 of 8 LITE-ON ELECTRONICS, INC. Property of Lite-On Only TABLE 1 SERIAL DATA INPUT SEQUENCE L T M -8522 PART NO.: LTM-8522G BNS-OD-C131/A4 B IT D IG IT SEGM ENT 1 1 A 2 1 B 3 1 C 4 1 D 5 1 E 6 1 F 7 1 G 8 1 D .P . 9 2 A 10 2 B 11 2 C 12 2 D 13 2 E 14 2 F 15 2 G 16 2 D .P . 17 3 A 18 3 B 19 3 C 20 3 D 21 3 E 22 3 F 23 3 G 24 3 D .P . 25 P IN 4 26 P IN 5 27 P IN 6 28 P IN 7 29 P IN 8 30 P IN 9 31 P IN 10 32 P IN 11 33 P IN 12 34 P IN 13 PAGE: 7 of 8 LITE-ON ELECTRONICS, INC. Property of Lite-On Only TYPICAL APPLICATION PART NO.: LTM-8522G BNS-OD-C131/A4 PAGE: 8 of 8