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Dot Matrix LED Unit for Outdoor Use LT1442M/LT1445M(Lamp Type)
s Features
No. of dots : 16!16dots Outline dimensions : 160!160mm Dot size : o7.5mm Dot pitch : 10mm Radiation color : Yellow-green+Red(High-luminosity)dichromatic type Driving method : Static drive
LT1445M
s Absolute Maximum Ratings
(Ta=25C)
s Electrical Characteristics
Parameter Supply voltage for IC Supply voltage for LED IC current dissipation LED current dissipation*1
(VCC=5V,VLED=3V,Ta=25C)
Parameter Symbol Rating Unit Supply voltage for IC V VCC 5.5 Supply voltage for LED V VLED 3.5 Input voltage*1 V 5.5 VI Operating temperature -10 to +75 Topr C Storage temperature -20 to +100 Tstg C W Power dissipation 35/49 P *1 VILT1442M/LT1445M in sequence.
s Optical Characteristics
Parameter Red Yellow-green Viewing angle Red Peak emission wavelength Yellow-green Luminance Symbol LV 21/2 p
(VCC=5V,VLED=3V,Ta=25C)
MIN. TYP. MAX. Unit Symbol V 5.0 VCC 4.75 5.25 V 3.0 2.75 3.25 VLED ------ 220/280 -----mA ICC ------ 9.3/11.5 -----ILED A ----------3.5 VIH V Input voltage ----------VIL V 1.5 ----------IIH 0.1 Input current A ----------IIL mA 0.12 Clock frequency ----------MHz 3.0 fCLK *1 Under the condition that dichromatic all dots are lit. Each figure in the table is the one of LT1442M/LT1445M in sequence.
TYP MIN. 800/700 MIN. 800/700 36/54 660 565
Unit cd/m nm
2
s Timing Chart
tsetup CLOCK RDATA GDATA LATCH tWL 1/fENA thold td(C-L) tWCLK
Each figure in the table is the one of LT1442M/LT1445M in sequence.
s Terminal Functions
Symbol VLED Power supply VCC (CN1) GND RDATA Connector GDATA LATCH Input signal (CN2) RENABLE GENABLE CLOCK GND RDATA GDATA Function Supply voltage for LED(+3V) Supply voltage for IC(+5V) Ground Serial data input for red(H=ON, L=OFF) Serial data input for yellow-green(H=ON, L=OFF) L: Contents of shift register is transmitted to latch register. H: Contents are latched. Controls ON/OFF of red LED (L: LED ON) Controls ON/OFF of yellow-green LED (L: LED OFF) Clock signal for data transmission in the shiftregister.(L/H: serial data is shifted.) Ground for signal Input signal generated through 256-bit shift register or buffer Input signal generated through 256-bit shift register or buffer
RENABLE GENABLE tWENA 1/fOSC Internal ENABLE Display pattern OFF ON OFF
s Block Diagram
Luminance adjustment circuit OSC VR1 (For red) VR2 (For yellow-green)
MONO-MULTI
CN2 Input signal portion GENABLE RENABLE CLOCK LATCH RDATA GDATA B U F F E R B U F F E R
CN3 Output signal portion GENABLE RENABLE CLOCK LATCH RDATA GDATA
Output signal LATCH Buffered input signal (CN3) RENABLE Buffered input signal GENABLE Buffered input signal Buffered input signal CLOCK Ground for signal GND Each signal is used as input signal for next unit. * As for the terminal number, refer to the outline dimensions.
Shift register(yellow-green)
Shift register(red)
LATCH
LATCH
Constant current driver
Constant current driver
LED lamp(dichromatic) 16!16dots Dot matrix Yellow-green Red
devices catalogs, data books, etc. Contact SHARP 8 (Internet) Data forshown inoptoelectronic/power device is provided for in order to obtain the latest device specification sheets before using any SHARP device. sharp's internet.(Address http://www.sharp.co.jp/ecg/)
(Notice)
In the absence of confirmation by device specification sheets, SHARP takes no responsibility for any defects that may occur in equipment using any SHARP
10
9.5 159 P10!13=130 9.5 52 38 23 15
159 P10!13=130
9.5
9.5
2.5
256-o7.5
1.6t
156 154 60 60
69.75
Pin connection 15.84 CN1(Power supply)
1 2 3 4 5 VLED GND VCC GND VLED
70
69.75
1
1
VR1 VR2
1
15 31
CN3 7
CN1 5
CN2 7
CN2(Input signal)
1 2 3 4 5 6 7 GDATA GENABLE LATCH GND CLOCK RENABLE RDATA
CN3(Output signal)
1 2 3 4 5 6 7 GDATA GENABLE LATCH GND CLOCK RENABLE RDATA
21 51 49
6-M3 Depth7
LT1442M/LT1445M
130 157

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