TC7129(2002) View Datasheet(PDF) - Microchip Technology
Part Name
Description
Manufacturer
TC7129
(Rev.:2002)
(Rev.:2002)
Microchip Technology
TC7129 Datasheet PDF : 24 Pages
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TC7129
FIGURE 4-11:
TC7129 FUNCTIONAL BLOCK DIAGRAM
Low Battery
Continuity
TC7129
OSC1
OSC2
OSC3
Segment Drives
Backplane
Drives
Annunciator
Drive
Latch, Decode Display Multiplexer
VDISP
Up/Down Results Counter
Sequence Counter/Decoder
Control Logic
RANGE
L/H
CONT
V+
V-
DGND
Analog Section
DP1
DP2
UR/DP3
OR/DP4
REF HI
REF LO
INT OUT
INT IN
COMMON
IN IN
HI LO
BUFF
FIGURE 4-12:
INTEGRATOR BLOCK DIAGRAM
CREF
RINT
CINT
REF HI
REF LO
IN HI
DE
INT1
DE-
DE
DE+
–
+ Buffer
Common
IN LO
Continuity
DE+
INT1, INT2
DE-
ZI, X10
INT
REST
–V+
200mV
–
500kΩ
+ Continuity
Comparator
Integrator
10
–
pF
+
100pF
X10
Comparator 1
+
–
TC7129
To Display Driver
To Digital
Section
Comparator 2
DS21459B-page 14
© 2002 Microchip Technology Inc.
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