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TC820CKW データシートの表示(PDF) - TelCom Semiconductor Inc => Microchip
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TC820CKW
3-3/4 DIGIT A/D CONVERTER WITH FREQUENCY COUNTER AND LOGIC PROBE
TelCom Semiconductor Inc => Microchip
TC820CKW Datasheet PDF : 22 Pages
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3-3/4 A/D CONVERTER WITH
FREQUENCY COUNTER
AND LOGIC PROBE
FUNCTIONAL BLOCK DIAGRAM
CR+
EF
VI+N
VI–N
VR+
EF
VR–
EF
COMMON
VDD
VSS
CR–EF VBUFF
CAZ
VINT OSC1 OSC2
OSC3
BUZ IN
LOGIC
LOW
÷
8
÷
2
FREQUENCY COUNTER INPUT
LOW TO LCD
BATT
DETECT
A/D CONTROL
DEINT
UNDERRANGE
OVERRANGE
EOC
RANGE
RANGE/FREQ
INPUT
TC820
A/D COUNTER SELECT
SEL
B
A
RANGE
A/D COUNTER
(3999 COUNTS)
COMPARATOR
A>B
LOW BATT
DISPLAY
LATCH
LOGIC
LOW
TRIPLEX
DRIVERS
15
DGND UR OR
EOC/
HOLD
PEAK
HOLD
ANNUNC VDISP SEG0 • • • BP3
1
TC820
2
BUZZER
DRIVER
RANGE/
FREQ
3
FREQ/
VOLTS
4
LOGIC
DP0/LO
DP1/HI
5
6
7
TELCOM SEMICONDUCTOR, INC.
8
3-155
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