參數(shù)資料
型號(hào): HM91710B
廠(chǎng)商: ELAN Microelctronics Corp .
英文描述: TONE/PULSE SWITCHABLE DIALER
中文描述: 音頻/脈沖可切換撥號(hào)器
文件頁(yè)數(shù): 7/19頁(yè)
文件大?。?/td> 131K
代理商: HM91710B
7
HM91710A/B
TONE/PULES SWITCHABLE DIALER
* This specification are subject to be changed without notice.
1.7.2002
TEST CIRCUIT
1
3
Operation current
Tone output voltage
5
2
4
Standby current
Tone distortion
6
**
(V1)**2+(V2)**2+..+(Vn)**2
DIST.(dB)= 20log
(VL)**2+(VH)**2
a. V1....Vn are extraneous frequencies (ie, inter modulation and
harmonic)
components in the 500Hz to 3400Hz band.
b. VL,VH are the individual frequency components of the
DTMF signal
c. Whether keyboard is pushed refer to the TONE mode time
diagram
A
V
SS
V
DD
V+
HKS
V+
KEY
BOARD
MODE
A
HKS
V
DD
V
SS
DP
DP
DT
V
SS
V
DD
V+
HKS
TONE
10K
KEYBOARD
ENTRY
.
COUNTER
AND
AC METER
V
SS
V
DD
V+
10K
SPECTRUM
ANALYZER
V
KEYBOARD
ENTRY
HKS
TONE
A
V
HKS
Flash Key
V
SS
V
DD
V
+
VEXT
PO
Pulse output sink current(
open drain structure)
A
V
V
V
C
MODE
R
*
*
SS
DD
HKS
ROW
+
Keypad input
7
Isink=I/(1-Duty Cycle) I is the net DC current measured from
ampere meter.
R* , C* mean others column and row.
A
HKS
V
VSS
MODE
VDD
R
C
*
*
+
Column
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