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ltm-8500 series package dimensions a. ltm-8522 features 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. 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 bright- ness 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 de- vices utilize led chips which are made from gaasp on a transparent gap substrate. the mos integrated cir- cuits 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 other- wise noted. 16-m8500.p65 2000/7/11, uJ 07:33 page 205 adobe pagemaker 6.5c/win
9-206 part no. ltm- hi.-eff. red 3 digit, rt. hand decimal 1 1 / 2 digit, rt. hand decimal 2 digit, rt. hand decimal 8522hr 8529hr 8530hr green 8522g 8529g 8530g pockage dimension description a b c devices red orange 8522e 8529e 8530e bright red 8522p 8529p 8530p pin connection ltm-8522 vss v led v led bit 25 output bit 26 output bit 27 output bit 28 output bit 29 output bit 30 output bit 31 output bit 32 output bit 33 output bit 34 output data enable data input clock input v dd brt. control pin no. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 connection yellow 8522y 8529y 8530y ltm-8529 vss v led no pin no pin no pin bit 15 output bit 16 output bit 17 output bit 18 output bit 19 output bit 20 output bit 21 output bit 22 output data enable data input clock input v dd brt. control ltm-8530 vss v led no pin no pin no pin bit 17 output bit 18 output bit 19 output bit 20 output bit 21 output bit 22 output bit 23 output bit 24 output data enable data input clock input v dd brt. control absolute maximum ratings at ta=25 symbol parameter supply voltage*1 input voltage off state output voltage led supply voltage power dissipation of ic*2 supply current operating temperature range storage temperature range v dd v i v o (off) v led p d (ic) i dd top tstg min. -0.3 -0.3 2.8 -20 -20 max. 12 12 12 3.5 335 8.5 +60 +60 unit v v v v mw ma note : 1. all voltages are with respect to vss(gnd) 2. power dissipation of ic is given by p d =(v led -v f ) (i f ) (no. of segments)+(8.5ma) (v dd ) *v f is led forward voltage. solder temperature 1/16 inch below seating plane for 3 seconds at 260
9-207 displays recommended operating condition at ta=25 electrical/optical characteristics at ta=25 ltm-8522p/8529p/8530p symbol parameter supply voltage input voltage logical 0 level logical 1 level logical 1 level brightness input current brightness input voltage off state voltage output sink current segment off segment on input clock frequency output matching v dd v i i b v b v o (off) f clock i o min. 4.75 -0.3 2.2 v dd -2 0 3 0 typ. 3 6 max. 11 0.8 v dd v dd 0.75 4.3 11 10 0.5 20 unit v v v v ma v v a ma ma mhz % test condition 10 a input bias 4.75v5.25v input current =750 a i f =0 a i b =100 a i f =200 a ltm-8522g/8529g/8530g ltm-8522y/8529y/8530y symbol parameter average luminous intensity peak emission wavelength spectral line half-width dominant wavelength luminous intensity matching ratio i v p d i v -m min. 320 typ. 950 697 90 657 max. 2:1 unit cd nm nm nm test condition i b =0.4ma i b =0.4ma i b =0.4ma i f =20ma i b =0.4ma symbol parameter average luminous intensity peak emission wavelength spectral line half-width dominant wavelength luminous intensity matching ratio i v p d i v -m min. 800 typ. 2400 565 30 569 max. 2:1 unit cd nm nm nm test condition i b =0.4ma i b =0.4ma i b =0.4ma i f =20ma i b =0.4ma symbol parameter average luminous intensity peak emission wavelength spectral line half-width dominant wavelength luminous intensity matching ratio i v p d i v -m min. 800 typ. 2400 585 35 588 max. 2:1 unit cd nm nm nm test condition i b =0.4ma i b =0.4ma i b =0.4ma i f =20ma i b =0.4ma ltm-8522e/8529e/8530e symbol parameter average luminous intensity peak emission wavelength spectral line half-width dominant wavelength luminous intensity matching ratio i v p d i v -m min. 800 typ. 2400 630 40 621 max. 2:1 unit cd nm nm nm test condition i b =0.4ma i b =0.4ma i b =0.4ma i f =20ma i b =0.4ma
9-208 ltm-8522hr/8529hr/8530hr note: luminous intensity is measured with a light sensor and filter combination that approximates the cie (commision internationale de leclairage) eye-response curve. symbol parameter average luminous intensity peak emission wavelength spectral line half-width dominant wavelength luminous intensity matching ratio i v p d i v -m min. 800 typ. 2400 635 40 623 max. 2:1 unit cd nm nm nm test condition i b =0.4ma i b =0.4ma i b =0.4ma i f =20ma i b =0.4ma 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 figure 2. input data format
9-209 displays table i serial data input sequence bit 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 ltm-8522 ltm-8529 ltm-8530 digit segment digit segment digit segment 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 3 3 3 3 3 3 3 3 a b c d e f g d.p. a b c d e f g d.p. a b c d e f g d.p. pin 4 pin 5 pin 6 pin 7 pin 8 pin 9 pin 10 pin 11 pin 12 pin 13 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 1 1 1 1 1 1 2 2 2 2 2 2 2 2 b c g h j d.p. a b c d e f g d.p. pin 6 pin 7 pin 8 pin 9 pin 10 pin 11 pin 12 pin 13 no connection no connection no connection no connection no connection no connection no connection no connection no connection no connection no connection no connection a b c d e f g d.p. a b c d e f g d.p. pin 6 pin 7 pin 8 pin 9 pin 10 pin 11 pin 12 pin 13 no connection no connection no connection no connection no connection no connection no connection no connection no connection no connection figure 3. timing relationship
9-210 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. 16-m8500.p65 2000/7/11, uJ 07:34 page 210 adobe pagemaker 6.5c/win
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