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Dot Matrix LED Unit for Indoor Use LT1461ED(Chip On Board Type)
s Features
No. of dots : 16!16dots Outline dimensions : 64!64mm Dot size : o2.8mm Dot pitch : 4.0mm Radiation color : Yellow-green+Red(dichromatic type) Driving method : 1/16 duty dynamic drive
LT1461ED
s Absolute Maximum Ratings
Parameter Supply voltage for IC Supply voltage for LED Input voltage Turn-on time Operating temperature Storage temperature Power dissipation Symbol VCC VLED VI tON Topr Tstg P Rating 6.0 6.0 -0.3 to +5.5 1 -10 to +45 -20 to +70 13
(Ta=25C)
s Electrical Characteristics
Parameter Supply voltage for IC Supply voltage for LED IC current dissipation*1 LED current dissipation*1
(VCC=5V,VLED=5V,Ta=25C)
Unit V V V ms C C W
Symbol MIN. TYP. MAX. Unit V 5.25 5.0 VCC 4.75 -----V 5.25 5.0 VLED ----------mA 50 ICC ----------A 1.8 ILED ----------V 3.5 VIH Input voltage ----------V 1.5 VIL ----------A 0.1 IIH Input current ----------0.12 IIL mA ----------Clock frequency 4 fCLK MHZ Frame frequency -----625 80 fFR HZ *1 Under the condition that dichromatic all dots are lit.
s Optical Characteristics
Parameter Red Yellow-green Viewing angle Red Peak emission wavelength Yellow-green Luminance Symbol LV 21/2 p
(VCC=5V,VLED=5V,Ta=25C)
TYP 90 90 80 635 565
Unit cd/m nm
2
s Timing Chart
tsu CLOCK RDATA GDATA RDATAout GDATAout LATCH th tWCLK
HD(n+1)DATA tdD td(C-L) tWL
HD(n+2)DATA td(L-C)
s Terminal Functions
Function Connector Symbol Supply voltage for LED (+5V) VLED Power VCC Supply voltage for IC (+5V) supply Ground for IC (CN1) GND1 Ground for LED GND2 A0 to A3 Address specification signal for row driver RDATA Serial data input for red (H=ON, L=OFF) GDATA Serial data input for yellow-green (H=ON, L=OFF) Input signal (CN2) LATCH Latch signal of display data. L: Contents are latched.
ENABLE ADDRESS (A0~A3)
HD(n)DATA ON td(E-L) HD(n) td(E-A) td(L-A)
OFF
tEN HD(n+1)DATA ON td(L-E) HD(n+1) td(A-E)
tOFF
s Block Diagram
Vcc 47K
ENABLE Controls ON/OFF of LED (H: LED OFF) CLOCK
CN2 A0 A1 A2 A3 RDATA GDATA CLK LATCH ENABLE
HC367 Input circuit
Clock signal for data transmission in the shiftregister. (LH: serial data is shifted.) Ground for signal. (Connected to ground for IC) GND1 A0 to A3 Buffered input signal Input signal generated through 16-bit shift register RDATA or buffer Output GDATA Input signal generated through 16-bit shift register signal or buffer (CN3) LATCH Buffered input signal ENABLE Buffered input signal CLOCK Buffered input signal Ground for signal. (Connected to ground for IC) GND1 Each signal is used as input signal for next unit. * As for the terminal number, refer to the outline dimensions.
CN3 A0 A1 A2 A3 RDATA GDATA CLK LATCH ENABLE
Buffer
Decoder Driver Shiftresister Latch(G) Shiftresister Latch(R)
Driver
LED Matrix
VR1 VR2 G.ADJ G.ADJ Mono-Multi OSC
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Driver
15
2
63.8 0.2 P4.0X15=60.0 HD0 36.0 30.0
1
63.8 0.2 P4.0!15=60.0
VD0
HD15 256-o2.8 VD15
32.0 MAX
25.0
Pin connection
19 MAX 20 MAX 7 MIN 8 MIN CN3 CN2 10 10 6.6 CN1 (Power supply) 4-M3.0 (Depth 6.0)
1 2 3 4 V LED V CC GND1 GND2
6.6 13 MAX
19 MAX 2 MAX
28.0 0.1
23.2
CN2 (Input signal)
1 2 3 4 5 6 7 8 9 10 A0 A1 A2 A3 RDATA GDATA LATCH ENABLE CLOCK GND1
CN3 (Output signal)
1 2 3 4 5 6 7 8 9 10 A0 A1 A2 A3 RDATA GDATA LATCH ENABLE CLOCK GND1
22.8
1 10.5
16.5 4 28.0 0.1 62.5 4.5 28.0 0.1
LT1461ED
28.0
CN1 VR2 VR1
23.5 8MAX
0.1
1 4
1
62.5

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