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参数资料
| 型号： | TS34118 |
| 厂商： | Taiwan Semiconductor Co., Ltd. |
| 英文描述： | Voice Switched Speakerphone Circuit |
| 中文描述： | 语音开关扬声器电路 |
| 文件页数： | 5/20页 |
| 文件大小： | 328K |
| 代理商： | TS34118 |
TS34118
5-20
2004/09 rev. B
Pin Function Description
Pin
Name
Description
1
FO
Filter output. Output impedance is less than 50 ohms.
2
FI
Filter input. Input impedance is greater than 1.0Mohm.
3
CD
Chip Disable. A logic low(<0.8V) sets normal operation. A logic high (>2.0V) disables the IC to
conserve power. Input impedance is norminally 90K
.
4
Vcc
A supply voltage of +2.8 to +6.5 volts is required, at
≈
5.0mA. As Vcc falls from 3.5 to 2.8volts,
an AGC circuit reduces the receive attenuator gain by
≈
25dB (when in the receive mode).
5
HTO+
Output of the second hybrid amplifier. The gain is internally set at –1.0 to provide a differential
output, in conjunction with HTO-, to the hybrid transformer.
6
HTO-
Output of the first hybrid amplifier. The gain of the amp is set by external resistors.
7
HTI
Input and summing node for the first hybrid amplifier . DC level is
≈
V
B.
Output of the transmit attenuator. DC level is approximately V
B.
Input to the transmit attenuator. Max. Signal level is 350m Vrms . Input impedance is 10K
.
8
TXO
9
TXI
10
MCO
Output of the microphone amplifier. The gain of the amplifier is set by external resistors.
11
MCI
Input and summing node of the microphone amplifier. DC level is
≈
V
B.
Mute input. A logic low(<0.8V) sets normal operation. A logic high (>2.0V) mutes the
microphone amplifier without affecting the rest of the circuit. Input impedance is norminally
90K
.
12
MUT
13
VLC
Volume control input. When VLC=V
B
, the receive attenuator is at maximum gain when in the
receive mode. When VLC=0.3V
B
, the receive gain is down 35dB. Does not affect the transmit
mode.
14
C
T
An RC at this pin sets the response time for the circuit to switch modes.
15
V
B
An output voltage
≈
Vcc/2. This voltage is a system ac ground, and biases the volume control. A
filter cap is required
16
CPT
An RC at this pin sets the time constant for the transmit background monitor.
17
TLI2
Input to the transmit level detector on the mike/speaker side.
18
TLO2
Output of the transmit level detector on the mike/speaker side, and input to the transmit
background monitor.
19
RLO2
Output of the receive level detector on the mike/speaker side.
20
RLI2
Input to the receive level detector on the mike/speaker side.
21
RXI
Input to the receive attenuator and dial tone detector. Max input level is 350mV RMS. Input
impedance is
≈
10K
.
22
RXO
Output of the receive attenuator. DC level is approximately V
B
.
Input to the transmit level detector on the line side.
23
TLI1
24
TLO1
Output of the transmit level detector on the line side.
25
RLO1
Output of the receive level detector on the line side, and input to the receive background
monitor.
26
RLI1
Input to the receive level detector on the line side.
27
CPR
An RC at this pin sets the time constant for the receive background monitor.
28
GND
Ground pin for the entire IC.
相关PDF资料 |
PDF描述 |
|---|---|
| TS34118CD | Voice Switched Speakerphone Circuit |
| TS34118CS | Voice Switched Speakerphone Circuit |
| TS34119 | Low Power Audio Amplifier |
| TS34119CD | Low Power Audio Amplifier |
| TS34119CS | Low Power Audio Amplifier |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TS34118_1 | 制造商:TSC 制造商全称:Taiwan Semiconductor Company, Ltd 功能描述:Voice Switched Speakerphone Circuit |
| TS34118_13 | 制造商:TSC 制造商全称:Taiwan Semiconductor Company, Ltd 功能描述:Voice Switched Speakerphone Circuit Chip disable for active/standby operation |
| TS34118CD | 制造商:TSC 制造商全称:Taiwan Semiconductor Company, Ltd 功能描述:Voice Switched Speakerphone Circuit |
| TS34118CD28C4 | 制造商:TSC 制造商全称:Taiwan Semiconductor Company, Ltd 功能描述:Voice Switched Speakerphone Circuit |
| TS34118CS | 制造商:TSC 制造商全称:Taiwan Semiconductor Company, Ltd 功能描述:Voice Switched Speakerphone Circuit |
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