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参数资料
| 型号： | CH1817LET |
| 厂商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Family of Low Profile DAA Modules |
| 中文描述： | DAA的超薄系列模块 |
| 文件页数： | 3/7页 |
| 文件大小： | 443K |
| 代理商： | CH1817LET |
Cermetek Microelectronics, Inc.
CH1817 Family of Low Profile DAA Modules
Table 1.
CH1817 Family Pin Description.
Pin
1
Name
TIP
I/O
I/O
Function
TIP
. Direct telephone line connection.
2
RING
I/O
RING
. Direct telephone line connection.
3
OFFHK
I
OFF HOOK
. When set LOW, the CH1817 is placed On-Hook. When set HIGH, the
CH1817 is placed Off-Hook to answer or place a call. This input can also be used
for pulse dialing. NOTE: When answering incoming calls in response to a ring
indication on RI, internal relay contact degradation may occur if OFFHK is set HIGH
before RI returns to its HIGH state.
RING INDICATION
. It is asserted LOW by the CH1817 during the 2 second ON
portion of the incoming AC Ring Signal and is asserted HIGH during the 4 second
idle period between rings. An envelope of the AC ring signal may be created using
the application circuit shown in Figure 2.
RECEIVE
. This provides the signal or audio output with respect to ground and must
be AC coupled with a 0.1
μ
F capacitor to eliminate DC offset.
4
RI
O
5
RCV
O
6
XMIT(-)
or
N/C
VCC
I
or
-
I
TRANSMIT SIGNAL (-)
. Input a differential AC coupled audio signal with respect to
XMIT(+), CH1817-D versions only. All others, No Connection. For single ended
operation of CH1817-D, connect this pin to ground through a 0.1
μ
F capacitor.
POWER SUPPLY
. +5V ± 5%
7
8
XMIT(+)
I
TRANSMIT SIGNAL (+)
. Input an AC coupled audio signal with respect to ground.
Input a differential signal with respect to XMIT(-) for the CH1817-D versions only.
9
GND
I
Ground
. Must be connected to signal ground. Note: Noise should be less than
25mV peak-to-peak.
2002 Cermetek Microelectronics, Inc.
Page 3
Document No. 607-0007 Revision B (01/02)
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相关代理商/技术参数 |
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|---|---|
| CH1817LM | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Family of Low Profile DAA Modules |
| CH1817-LM | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Family of Low Profile DAA Modules |
| CH1818 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Telecommunication IC |
| CH1819 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Telecommunication IC |
| CH181-W | 制造商:Leviton Manufacturing Co 功能描述: |
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