dsd-40bcd ETC-unknow, dsd-40bcd Datasheet - Page 2

• Manufacturer Part Number: dsd-40bcd
• Description: Miniature Digit, Input Slave Display
• Manufacturer: ETC-unknow

Functional Specifications
T
A
Control Inputs
BCD (pins I-L) and TEST (pin 2) Inputs:
Polarity Input (pin F):
Digit Drive Inputs (pins A-E):
DP1-DP4 Inputs (pins 4-6, 8):
Power Supply Requirements
Supply Voltage
Supply Current:
Display
Display Type and Size
LED Peak Wavelength ( ):
Physical/Environmental
Operating Temperature
Storage Temperature
Humidity (Non-condensing)
Case Material
Weight
BCD Inputs and Resultant Displays
= +25°C and supply voltage = +5V, unless otherwise noted.
Ordering Information
DSD-40BCD - R S
Low-Level Input Voltage (V
Low-Level Input Current (I
High-Level Input Voltage (V
High-Level Input Current (I
Low-Level Input Voltage (V
Low-Level Input Current (I
High-Level Input Voltage (V
High-Level Input Current (I
Low-Level Input Voltage (V
Low-Level Input Current (I
High-Level Input Voltage (V
High-Level Input Current (I
Low-Level Input Voltage (V
Low-Level Input Current (I
High-Level Input Voltage (V
High-Level Input Current (I
DSD-40BCD-GS
DSD-40BCD-RL
DSD-40BCD-RS
DSD-40BCD-GS
DSD-40BCD-RL
DSD-40BCD-RS
DSD-40BCD
0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 1011 1100 1101 1110 1111
Accessories:
A panel-mount retaining clip is supplied with each model.
DMS-30-CP
DMS-BZL1
DMS-BZL2
Order on-line at www.datel.com
Panel cutout punch
DSD-40 bezel assembly
DSD-40 bezel assembly with sealing gasket
IL
IL
IL
IL
IH
IH
IH
IH
IL
IL
IL
IL
)
)
)
)
IH
IH
IH
IH
)
)
)
)
)
)
)
)
)
)
)
)
LED Color: GS = Standard Green
+4.75
Min.
+2.4
+4.5
+4.5
+4.5
–40
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0
0
4½ Digit LED, 0.52"/13.2mm high
RL = Low-Power Red
RS = Standard Red
1 ounce (28 grams)
+5.00
Typ.
+100
+35
+85
565
660
635
Polycarbonate
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4 ½ D I G I T , S L A V E L E D D I S P L A Y
Max.
+5.25
+130
+110
+0.8
0.05
+0.8
0.05
+0.8
+0.8
0.05
+45
+70
+75
0.4
0.4
0.4
20
95
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2
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Units
Volts
Volts
Volts
Volts
Volts
Volts
Volts
Volts
Volts
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
nm
nm
nm
°C
°C
%
2
Technical Notes
1. DSD-40BCD Operation (Please Refer to the Timing and Pinout
2. DSD-40BCD Timing Diagram (See Figure 2): The timing diagram
3. Decimal Point Inputs (DP1- DP4, Pins 4-6, 8): The four, active-low,
4. POLARITY (Pin F): The function of this active-low pin is to turn on
Diagrams for the Following Discussion): The DSD-40BCD display has
five digits, labeled digit 1 (left-most digit or MSD) through digit 5 (right-
most digit or LSD), which are turned on by bringing their respective
DIGIT DRIVE inputs to a high logic level. The binary coded decimal
data (BCD) on pins I- L is decoded into the corresponding seven-
segment LED outputs necessary to display the numerals
"0" through "9".
Since there are effectively five digits and only one set of BCD data
inputs, the DSD-40BCD's digits have their segments tied ("multi-
plexed") together. The top segment, referred to as segment A, of digit
5 is connected to the A segment of the other three digits (digit 1 has
no A segment). The remaining B, C, D, E, F and G segments are
connected to each other in the same fashion.
As an example of how the multiplexing scheme works, assume that
the BCD data inputs are 0001 (the BCD code for the decimal number
1) and also assume that the DIGIT DRIVE 3 input is high. Under these
conditions, the B and C segments of digits 1-5 will all be enabled.
However, only the digits whose DIGIT DRIVE inputs are high, in this
case only digit 3, will display the numeral "1". All the other digits will be
off. This example, while technically valid, will produce an extremely
bright "1" for digit 3. This will be explained in greater detail in the
section titled "Controlling the Display Brightness."
depicts the required typical input conditions and timing relationships
that allow the user to access all 5 digits. The recommended display
scan rate is 100Hz. All 5 digits are scanned in 10ms, and each
individual digit is "on" for 2ms (20% duty cycle). The 100Hz figure is
not critical; it can go as low as 70Hz without any impact on
display visibility.
The timing diagram shows the digits being scanned from left to right
(DIGIT 1 to DIGIT 5), but this order is not mandatory. Any drive
sequence can be used, as long as BCD data is presented at the
correct corresponding DIGIT DRIVE interval. An important point to
keep in mind is that the DSD-40BCD has no internal data latches!
The DIGIT DRIVE and BCD data inputs must be continuously strobed
to keep the display properly illuminated.
decimal point segments are multiplexed in a similar, though not
identical, manner as the rest of the digit segments. The four decimal
points are controlled by their respective DIGIT DRIVE inputs. A
selected decimal point may be permanently connected to ground. It
will only be illuminated when its respective DIGIT DRIVE input is high.
For example, if pin 6 (DP1) is hard-wired to pin 3 (5V RETURN), DP1
will only be on during the time interval that DIGIT DRIVE 1 is high.
As the specifications table clearly states, DP1- DP4 each require
20mA of sink current in order to achieve good illumination levels.
Unused decimal points may be left open. The specified minimum
V
decimal points.
the minus sign if negative readings are desired. The polarity input, like
the decimal points, can also be permanently connected to ground.
However, POLARITY is logic-level compatible and does not require
IH
applies only if logic-level devices are used to select the