TC820CLW713 Microchip Technology, TC820CLW713 Datasheet - Page 6

• Manufacturer Part Number: TC820CLW713
• Description: IC ADC 3 3/4DGT LGC PROBE 44PLCC
• Manufacturer: Microchip Technology

Specifications of TC820CLW713

• Display Type: LCD
• Configuration: 7 Segment + 2 Annunciators
• Digits Or Characters: A/D 3.75 Digits
• Current - Supply: 1mA
• Voltage - Supply: 9V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 44-PLCC
• Lead Free Status / RoHS Status: Request inventory verification / Request inventory verification
• Interface: -

TC820
2.0
The descriptions of the pins are listed in
TABLE 2-1:
DS21476C-page 6
Pin Number
(40-PDIP)
10
11
12
13
14
15
16
17
18
19
20
21
22
23
—
1
2
3
4
5
6
7
8
9
PIN DESCRIPTIONS
Pin Number
(44-PQFP)
PIN FUNCTION TABLE
40
41
42
43
44
10
11
12
13
14
15
16
17
18
19
1
2
3
4
5
6
7
8
9
ANNUNC Square-wave output at the backplane frequency, synchronized to BP1. ANNUNC can be
BUZOUT Buzzer output. Audio frequency, 5kHz, output which drives a piezoelectric buzzer.
RANGE/
Symbol
DP0/LO
BC1BT
DP1/HI
BC4P3
BC3P2
BC2P1
PKFE1
LOGIC
DGND
BUZIN
FREQ
AGD4
AGD3
OFE2
AGD2
AGD1
HFE3
V
L-E4
BP3
BP2
BP1
DISP
LCD segment driver for L ("logic LOW"), polarity, and "e" segment of most significant digit
(MSD).
LCD segment drive for "a," "g," and "d" segments of MSD.
LCD segment drive for "b" and "c" segments of MSD and decimal point 3.
LCD segment drive for H ("logic HIGH"), and "f" and "e" segments of third LSD.
LCD segment drive for "a," "g," and "d" segments of third LSD.
LCD segment drive for "b" and "c" segments of third LSD and decimal point 2.
LCD segment drive for "over range," and "f" and "e" segments of second LSD.
LCD segment drive for "a," "g," and "d" segments of second LSD.
LCD segment drive for "b " and "c" segments of second LSD and decimal point 1.
LCD segment drive for "hold peak reading," and "f" and "e" segments of LSD.
LCD segment drive for "a," "g," and "d" segments of LSD.
LCD segment drive for "b" and "c" segments of LSD and "low battery."
LCD backplane #3.
LCD backplane #2.
LCD backplane #1.
Sets peak LCD drive signal: V
compensate for temperature variation of LCD crystal threshold voltage.
Internal logic digital ground, the logic "0" level. Nominally 4.7V below V
used to control display annunciators. Connecting an LCD segment to ANNUNC turns it
on; connecting it to its backplane turns it off.
Logic mode control input. When connected to V
LCD displays "OL" and the decimal point inputs control the HIGH and LOW annunciators.
When the "low" annunciator is on, the buzzer will also be on. When unconnected or
connected to DGND, the is in the Voltage/Frequency Measurement mode. This pin has a
5 µA internal pull-down to DGND.
Dual purpose input. In Range mode, when connected to V
will be 200 counts instead of 2000 counts.
Dual purpose input. Decimal point select input for voltage measurements. In logic mode,
connecting this pin to V
pull-down to DGND in Volts mode only. Decimal point logic:
Dual purpose input. Decimal point select input for voltage measurements. In Logic mode,
connecting this pin to V
pull-down to DGND in Volts mode only.
Buzzer control input. Connecting BUZIN to V
OR’ed (internally) with the "logic level low" input. There is an internal 5 μA pull-down to
DGND.
Table
DP1
0
0
1
1
2-1.
DPQ
0
1
0
1
DD
DD
will turn on the "low" LCD segment. There is an internal 5 µA
will turn on the "high" LCD segment. There is an internal 5 μA
PEAK
Decimal Point Selected
= (V
Description
DD
None
DP1
DP2
DP3
) – V
DD
DISP
DD
turns the buzzer on. BUZIN is logically
, the converter is in Logic mode. The
. V
DISP
© 2007 Microchip Technology Inc.
DD
may also be used to
, the integration time
DD
.