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參數(shù)資料
| 型號： | SC91710B |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | TONE / PULSE SWITCHABLE DIALER WITH HANDFREE FUNCTION |
| 中文描述： | 音頻/脈沖開關(guān)的撥號器帶免提功能 |
| 文件頁數(shù)： | 10/18頁 |
| 文件大?。?/td> | 297K |
| 代理商： | SC91710B |
Silan
Semiconductors
SC91710A/B
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.0
2001-11-13
10
TEST CIRCUIT
A
HKS
V
SS
MODE
V
DD
DP
DP
DT
keyboard
Operation
current
1
2
Standby
current
V+
Tone output voltage
3
Tone distortion
4
keyboard
HKS
V
SS
TONE
V
DD
V+
keyboard
counter
and
AC meter
10K
HKS
V
SS
TONE
V
DD
V+
Spectrum
analyzer
V
10K
A
HKS
V
DD
V
SS
V+
HKS V
SS
R*
V
DD
Keypad input current (row group)
7
V+
C*
ROW
MODE
A
Pulse output sink current
(open drain structure)
5
6
Pulse output sink current
(inverter structure)
8
HKS V
SS
R*
V
DD
V+
C*
COLUMN
MODE
A
PO
Flash
key
HKS
V
SS
V
DD
V
VEXT
A
PO
V
SS
V
DD
HKS
V
VEXT
A
keypad input current (column group)
Note: 1. Dist. (dB)=20log
{[
V
12
+V
22
+V
32
+…V
n2
)
1/2
]
/
[
(V
L2
+V
H2
)
1/2
]}
a. V1…Vn are extraneous frequencies (ie, inter modulation and harmonic), components in the 500Hz
to
3400Hz band.
b. V
L
,V
H
are the individual frequency components of DTMF signal.
c. Whether keyboard is pushed refer to the TONE mode time diagram.
2. Sink current Isink=I/(1-Duty Cycle), I is the net DC current measured from ampere meter.
3. R*, C* mean other column and row.
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