4-1/2 DIGIT ANALOG-TO-DIGITAL
CONVERTER WITH ON-CHIP LCD DRIVERS
TC7129
ELECTRICAL CHARACTERISTICS:
V
+
to V
–
= 9V, V
REF
= 1V, T
A
= +25°C, f
CLK
= 120 kHz, unless otherwise
indicated. Pin numbers refer to 40-pin DIP.
Symbol
Parameter
"Weak Output" Current
Sink/Source
Pin 22 Source Current
Pin 22 Sink Current
1
Test Conditions
Pins 20, 21 Sink/Source
Pin 27 Sink/Source
Min
—
—
—
—
Typ
3/3
3/9
40
3
Max
—
—
—
—
Unit
µA
µA
µA
µA
2
3
4
5
PIN CONFIGURATIONS
40-Pin PDIP
OSC1
OSC3
ANNUNICATOR DRIVE
B1, C1, CONT
A1, G1, D1
F1, E1, DP1
B2, C2, LO BATT
A2, G2, D2
F2, E2, DP2
1
2
3
4
5
6
7
8
9
40 OSC2
39
DP1
38 DP2
37 RANGE
36 DGND
35 REF LO
34 REF HI
33 IN HI
32
31
IN LO
B3, C3, MINUS 10
DISPLAY
A3, G3, D3 11
OUTPUT
F3, E3, DP3 12
LINES
B4, C4, BC5 13
A4, G4, D4
F4, E4, DP4
BP3
BP2
BP1
VDISP
DP4/OR
B1, C1, CONT
14
15
16
17
18
19
20
TC7129CPL
BUFF
–
30 CREF
+
29 CREF
28 COM
27 CONT
26 INT OUT
25 INT IN
+
24 V
23 V –
22 LATCH/HOLD
21 DP3/UR
B1, C1, CONT
A1, G1, D1
A1, G1, D1
44-Pin QFP
RANGE
DGND
OSC3
OSC1
OSC2
A.D.
DP1
DP2
NC
RANGE
44-Pin PLCC
OSC3
OSC1
OSC2
A.D.
DP1
DP2
NC
DGND
44 43
42
41 40 39
38
37
36
35
34
6
33
REF LO
32
REF HI
31
IN HI
30
IN LO
29
BUFF
5
4
3
2
1
44
43
42
41
40
6
39
REF LO
38
REF HI
37
IN HI
36
IN LO
35
BUFF
34
NC
33
CREF
32
CREF
31
COM
30
CONT
29
INT OUT
F1, E1, DP1
1
B2, C2, BATT
2
A2, G2, D2
3
F2, E2, DP2
4
B3, C3, MINUS
5
NC
6
A3, G3, D3
F3, E3, DP3
7
8
F1, E1, DP1
B2, C2, BATT
A2, G2, D2
7
8
9
F2, E2, DP2
10
B3, C3, MINUS
11
NC
12
A3, G3, D3
13
F3, E3, DP3
14
B4, C4, BC5
15
A4, G4, D4
16
F4, E4, DP4
17
18 19
20
21
22
23
24
25
TC7129CKW
28
NC
–
27
CREF
26
C +
REF
25
COM
24
CONT
23
INT OUT
TC7129CLW
–
+
7
B4, C4, BC5
9
A4, G4, D4
10
F4, E4, DP4
11
12 13
14
15 16
17
18
19
20
21 22
26
27
28
DP4/OR
BP1
DP3/UR
VDISP
LATCH/HOLD
DP4/OR
DP3/UR
VDISP
LATCH/HOLD
INT IN
INT IN
BP3
BP2
NC
V–
BP3
BP2
BP1
NC
V–
V+
V
+
8
3-233
TELCOM SEMICONDUCTOR, INC.
TELCOM [ TELCOM SEMICONDUCTOR, INC ]
