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TC7129CPL Datasheet(PDF) 15 Page - TelCom Semiconductor, Inc

Part # TC7129CPL
Description  4-1/2 DIGIT ANALOG-TO-DIGITAL CONVERTER WITH ON-CHIP LCD DRIVERS
PDF  15 Pages
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Manufacturer  TELCOM [TelCom Semiconductor, Inc]
Direct Link  http://www.telcom-semi.com
Logo TELCOM - TelCom Semiconductor, Inc

TC7129CPL Datasheet(HTML) 15 Page - TelCom Semiconductor, Inc

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TELCOM SEMICONDUCTOR, INC.
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Figure 17.
Display Segment Assignments
The ANNUNCIATOR DRIVE output (pin 3) is a square-
wave running at the backplane frequency (100 Hz or 83.3 Hz),
with a peak-to-peak voltage equal to DGND voltage. Con-
necting an annunciator to pin 3 turns it ON; connecting it to
its backplane turns it OFF.
Figure 18.
Backplane Waveforms
BP1
BP2
BP3
LOW BATTERY
LOW BATTERY
CONTINUITY
F4, E4, DP4
A4, G4, D4
B4, C4, BC4
F3, E3, DP3
A3, G3, D3
B3, C3, MINUS
B1, C1, CONTINUITY
A1, G1, D1
F1, E1, DP1
B2, C2, LOW BATTERY
A2, G2, D2
BACKPLANE
CONNECTIONS
F2, E2, DP2
CONTINUITY
BP1
BP2
BP3
Figure 19.
Typical Display Output Waveforms
VDD
VH
VL
VDISP
VDD
VH
VL
VDISP
VDD
VH
VL
VDISP
VDD
VH
VL
VDISP
b SEGMENT
LINE
ALL OFF
a SEGMENT
ON
d, g OFF
a, g ON
d OFF
ALL ON
TC7129
4-1/2 DIGIT ANALOG-TO-DIGITAL
CONVERTER WITH ON-CHIP LCD DRIVERS



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