BRIGHT LED ELECTRONICS CORP.
SINCE 1981
BT-M514RO-DR1
●
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Features :
0.56 inch (14.20mm) Digit Height.
Wide supply voltage operation.
Serial data input.
Constant current drivers.
Continuous brightness control.
Solid state reliability-long operation life.
No load signal required
Optional external data enable and reset
34 outputs,20mA sink capability
TTL compatible.
●
Package Dimensions :
●
1.
Description :
The BT-M514RO-DR1 is a 14.2mm
(0.56") 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 use hi-eff red LED chips,
which are made from AlGaAs on GaAs
substrate.
This product have a red face and
red segments
The MOS integrated circuits are
produced with N-channel silicon
gate technology.
Notes:
1. All dimensions are in millimeters(inches).
2. Tolerance is ±0.25mm(.01")unless otherwise
specified.
3. Specifications are subject to change without
notice.
2.
3.
4.
5.
●
Pin Connection:
Pin NO.
1
2
3
4
5
6
7
8
9
Description
VSS
V
LED
V
LED
Bit 25 Output
Bit 26 Output
Bit 27 Output
Bit 28 Output
Bit 29 Output
Bit 30 Output
Pin NO.
10
11
12
13
14
15
16
17
18
Description
Bit 31 Output
Bit 32 Output
Bit 33 Output
Bit 34 Output
Data Enable
Data Input
Clock Input
V
DD
BRT. Control
Note: Pin NO. 2 & 3 are internally connect.
Ver.1.0 Page 1 of 6
BRIGHT LED ELECTRONICS CORP.
SINCE 1981
BT-M514RO-DR1
●
Table I Serial Data Input Sequence
Bit
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
Digit
1
1
1
1
1
1
1
1
2
2
2
2
2
2
2
2
3
Segment
A
B
C
D
E
F
G
DP
A
B
C
D
E
F
G
DP
A
Bit
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
Digit
3
3
3
3
3
3
3
Segment
B
C
D
E
F
G
DP
Pin 4
Pin 5
Pin 6
Pin 7
Pin 8
Pin 9
Pin 10
Pin 11
Pin 12
Pin 13
Pad Name
V
DD
V
SS
Reset
B.C.
CLK
Data IN
ENB
Out 1~Out 35
Type
Power
Ground
Input
Input
Input
Input
Input
Output
Description
Power
Ground
Reset Signal Input,(Normally LO; Active HI)
DC Current Input For LED Brightness Control
Clock Input
Serial Data Input
Data Input Enables, (Normally LO; Active LO)
Nmos Output Drivers
●
Block Diagram
Ver.1.0 Page 2 of 6
BRIGHT LED ELECTRONICS CORP.
SINCE 1981
BT-M514RO-DR1
●
Functional Description
1.Data is transferred serially via 2 signals : clock and serial data. Data transfer without the added
inconvenience of an external load signal is accomplished by using a format of a leading “1”
followed by the allowed 35 data bits. These 35 data bits are latched after the 36
th
clock has been
transferred. This scheme provides non-multiplexed, direct drive to the led display. characters
currently displayed(thus, data output) changes only if the serial data bits differ from those
previously transferred.
2.Display brightness is determined by control of the output current for led displays. this control
function can be achieved by varying the current flowing into B.C. terminal. a simple way is to
set an external variable resistor illustrated in the block diagram. Typically, the output current is
36 times greater that current into B.C. terminal.
3. Figure 1 shows the input data format. A leading “1” is followed by 35 bits of data. After the 36
th
had been transferred, a load signal is generated synchronously with the clock high state. This
loads the 35 bits of data into the latches. A reset signal is generated consecutively with the
clock low which clears all shift registers for the next set of data. All shift registers are static
master-slave, with no clear for the master portion of the first register, allowing continuous
operation.There must be a complete of 36 clocks or the shift registers will not clear.
4. When the chip first powers on an internal power on reset signal is generated which resets all shift
registers and all latches. The start bit and the first clock return the chip to its normal operation.
Ver.1.0 Page 3 of 6
BRIGHT LED ELECTRONICS CORP.
SINCE 1981
BT-M514RO-DR1
●
Absolute Maximum Ratings, Ta=25℃ (Unless Otherwise Specified)
Characteristics
Supply Voltage
LED Supply Voltage
Clock Frequency
Input Voltage
Input B.C. Current
Output Sustaining Voltage
Out Continuous Current
Symbol
VDD
V
LED
Fosc
V
IN
I
BC
V
DS
IOUT
Rating
+3.5~+10
2.4~3.0
0~500K
-0.3~VDD+0.3
550
12
20
Unit
V
V
H
Z
V
µA
V
mA
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Timing Chart & Timing Conditions
VDD=+5V, Ta=25℃, Unless Otherwise Specified
Item
TH
TL
TDS
TDH
TDES
Description
Clock Input High Time
Clock Input Low Time
Serial Data Set-up Time
Serial Data Hold Time
Data Enable Set-up Time
Min
950
950
300
300
100
Typ
-
-
-
-
-
Max
-
-
-
-
-
Unit
nS
nS
nS
nS
nS
Ver.1.0 Page 4 of 6
BRIGHT LED ELECTRONICS CORP.
SINCE 1981
BT-M514RO-DR1
●
Absolute Maximum Ratings(Ta=25℃)
Parameter
Power Dissipation Per Segment
Forward Current Per Segment
Peak Forward Current Per Segment
Reverse Voltage Per Segment
Operating Temperature
Storage Temperature
Soldering Temperature
(1/16" From Body)
Symbol
Pd
I
F
I
FP
(Duty 1/10, 1KHZ)
V
R
Topr
Tstg
Tsol
Rating
80
30
150
5
-40℃~80℃
-40℃~85℃
260℃ For 5 Seconds
Unit
mW
mA
mA
V
-
-
-
●
Electrical And Optical Characteristics(Ta=25℃)
Parameter
Forward Voltage Per Segment
Luminous Intensity Per Segment
Reverse Current Per Segment
Peak Wave Length
Dominant Wave Length
Spectral Line Half-width
Symbol Condition
Vf
Iv
I
R
λp
λd
∆λ
I
F
=10mA
I
F
=10mA
V
R
=5V
I
F
=10mA
I
F
=10mA
I
F
=10mA
Min.
-
-
-
-
626
-
Typ.
1.9
3.0
-
640
-
40
Max.
2.5
-
100
-
636
-
Unit
V
mcd
µA
nm
nm
nm
Ver.1.0 Page 5 of 6
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