TC14433AEJG(2002) View Datasheet(PDF) - Microchip Technology
Part Name
Description
Manufacturer
TC14433AEJG Datasheet PDF : 20 Pages
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TC14433/A
FIGURE 4-2:
3-1/2 DIGIT LED VOLTMETER WITH LOW COMPONENT COUNT USING
COMMON CATHODE DISPLAYS
470k 0.1µF 0.1µF
+5V
MCP1525
VX Input
VIN
VOUT
VSS
20k
1µF
R1 R1/C C1 C01 C02
VX
CLK1
VAG
CLK0
DU
OR
EOE
Q0
TC14433 Q1
VREF
Q2
VSS
VDD
VEE
DS4 DS3 DS2 DS1
300k
+5V
A B1 a
B
b
C I4511B c
D
d
LT
e
LE
f
VSS VDD g
Resitor Network
or Individual
Resistor*
R
RDP
Alternate Overrange Circuit
with Separated LED
1/6 75492
OR
OR
1/7 1413
RR
+5V
VEE**
(Minus)
Minus
Control
RM
+5V
75492
OR
1413*
Digit Drivers
Common
Cathode
Led Display
Note 1: For VREF = 2000V; V: 1.999V full scale.
2: For VREF = 200mV; V: 199.9mV full scale (change 470k to R = 27k and decimal point position.
3: Peak digit current for an eight displayed is 7 times the segment current:
*To increase segment current capability, add two 75491 ICs between 14511B and resistor network.
The use of the 1413 as digit driver increases digit current capability over the 75492.
**V can range between -2.8V and -11V.
FIGURE 4-3:
ALTERNATE OSCILLATOR CIRCUITS
(A) Crystal Oscillator Circuit
(B) LC Oscillator Circuit
10
CLK1
C1
18M
TC14433
11 CLK0
47k
C2
10pF < C1 and C2 < 200pF
10 CLK1
C
L
TC14433
11 CLK0
C f = 1 2/LC
2π
For L = 5mH and C = 0.01µF, f ≅ 32kHz
© 2002 Microchip Technology Inc.
DS21394B-page 11
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