TC14433COG713 Microchip Technology, TC14433COG713 Datasheet - Page 10

• Manufacturer Part Number: TC14433COG713
• Description: IC ADC 3 1/2 DIGIT 24SOIC
• Manufacturer: Microchip Technology

Specifications of TC14433COG713

• Display Type: LED
• Configuration: 7 Segment
• Interface: BCD
• Digits Or Characters: A/D 3.5 Digits
• Current - Supply: 1.8mA
• Voltage - Supply: 4.5 V ~ 8 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 24-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Request inventory verification / Request inventory verification

TC14433/A
5.0
The Typical Application circuit is an example of a 3-1/2
digit voltmeter using the TC14433 with Common-
anode displays. This system requires a 2.5V reference.
Full scale may be adjusted to 1.999V or 199.9 mV.
Input overrange is indicated by flashing a display. This
display uses LEDs with common anode digit lines.
Power supply for this system is shown as a dual ±5V
supply; however, the TC14433 will operate over a wide
voltage range
The circuit in Figure shows a 3-1/2 digit LCD voltmeter.
The 14024B provides the low frequency square wave
signal drive to the LCD backplane. Dual power supplies
are shown here; however, one supply may be used
when V
be at least 2.8V above V
When only segments b and c of the decoder are con-
nected to the 1/2 digit of the display, 4, 0, 7 and 3
appear as 1.
The overrange indication (Q
when the count is greater than 1999; (e.g., 1.999V for
a reference of 2V) The underrange indication, useful for
auto-ranging circuits, occurs when the count is less
than 180; (e.g., 0.180V for a reference of 2V).
DS21394C-page 10
SS
TYPICAL APPLICATIONS
is connected to V
EE
.
EE
3
= 0 and Q
. In this case, V
0
= 1) occurs
AG
must
TABLE 5-1:
Figure is an example of a 3-1/2 digit LED voltmeter
with a minimum of external components, (only 11
additional components). In this circuit, the 14511B
provides the segment drive and the 75492 or 1413
provides sink for digit current. Display is blanked during
the overrange condition.
Note 1:
Condition
Note:
of MSD
Coded
+0 UR
+1 OR
-0 UR
-1 OR
+0
+1
-0
-1
Q
Q
Q
When used in conjunction with Q
of out of range condition is indicated; i.e., Q
= 0 → OR or Q
If the most significant digit is connected to
a display other than a “1” only, such as a
full digit display, segments other than b
and c must be disconnected. The BCD to
7-segment decoder must blank on BCD
inputs 1010 to 1111 (see Table 5-1).
3
2
0
Q
1
1
1
1
0
0
0
0
3
– 1/2 digit, low for “1”, high for “0”.
– Out of range condition exists if Q
– Polarity: “1” = positive, “0” = negative.
Q
1
0
1
0
1
0
1
0
2
TRUTH TABLE
Q
1
1
1
1
0
0
1
1
1
© 2006 Microchip Technology Inc.
Q
3
0
0
1
1
0
0
1
1
0
= 1 → UR.
4 – 1
0 – 1
7 – 1
3 – 1
BDC to 7-Segment
Decoding
b and c to MSD
only segments
Blank
Blank
Blank
Blank
Hook up
3
, the type
0
= 1.
3