ICL7149 データシートの表示（PDF） - Intersil
部品番号
コンポーネント説明
メーカー
ICL7149 Datasheet PDF : 13 Pages
| |||
ICL7139, ICL7149
Timing Waveform
FIRST AUTO ZERO
FIRST INTEGRATE
UNDERRANGE
FIRST DEINTEGRATE
AUTO ZERO
SECOND AUTO ZERO
SECOND INTEGRATE
UNDERRANGE
UNDERRANGE
SECOND DEINTEGRATE
AUTO ZERO
THIRD AUTO ZERO
THIRD INTEGRATE
THIRD DEINTEGRATE
AUTO ZERO
FOURTH AUTO ZERO
FOURTH INTEGRATE
FOURTH DEINTEGRATE
AUTO ZERO
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
FIGURE 1. LINE FREQUENCY CYCLES (1 CYCLE = 1000 INTERNAL CLOCK PULSES = 2000 OSCILLATION CYCLES)
Pin Descriptions
I/O
PIN NUMBER
O
1
O
2
O
3
I
4
I
5
I
6
O
7
O
8
I/O
9
I/O
10
I
11
I
12
I
13
I
14
I
15
O
16
I
17
I
18
I
19
DESCRIPTION
Segment Driver POL/AC
Backplane 2
Backplane 1
V+
V-
Reference Input
Lo Ω
Hi Ω
Deintegrate
Analog Common
Int I
Int V/Ω
Triple Point
Auto Zero Capacitor (CAZ)
Integrate Capacitor (CINT)
Beeper Output
mA / µA
Ω/V/A
Hi Ω DC/Lo Ω AC
I/O
PIN NUMBER
DESCRIPTION
I
20
Hold
O
21
Oscillator Out
I
22
Oscillator In
O
23
Segment DRIVER k/m
O
24
Segment Driver Ω/A
O
25
Segment Driver M Ω/µA
O
26
Segment Driver Lo Bat/V
O
27
Segment Driver B0/C0
O
28
Segment Driver A0/D0
O
29
Segment Driver G0/E0
O
32
Segment Driver A1/D1
O
33
Segment Driver G1/E1
O
34
Segment Driver F1/DP1
O
35
Segment Driver B2/C1
O
39
Segment Driver B3/C3
O
40
Segment Driver ADG3/E3
NOTE: For segment drivers, segments are listed as (segment for
backplane 1)/(segment for backplane 2). Example: pin 27; segment
B0 is on backplane 1, segment C0 is on backplane 2.
3-36
Share Link: 