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參數(shù)資料
| 型號： | U4074B |
| 英文描述： | Tone Ringer Interface |
| 中文描述： | 音鈴聲接口 |
| 文件頁數(shù)： | 3/6頁 |
| 文件大小： | 99K |
| 代理商： | U4074B |
U4074B
Preliminary Information
TELEFUNKEN Semiconductors
Rev. A1, 06-May-96
3 (6)
Tone ringing
Figure 1
2 kV
93 7575 e
a
b
10 F
110
0.22 F
15
25
Figure 2. Test circuit
Outputs O
1
, O
2
Pin 11, 12
The bridge push-pull outputs are used for direct
connection of a piezo electric sound transducer with a
typical value of 80 nF. The output stage transistors can
process up to 20 mA in both directions.
The output signal without load is 2
(V
B
- V
DD
–3.5 V)
R
i
V
(12,11
open
V
(12,11)
load– 1
R
load
where R
load
= 400
Volume Adjustment A1, A0
Pin 5 (6), 6 (7)
The ringing volume is adjusted by means of a 2-bit D/A
converter. The maximum volume is achieved with the bit
combination A1 (MSB) = 1 and A0 (LSB) = 1. The
volume can be reduced by approximately 35 dB (A) if a
bit combination of A1 = 0, A0 = 0 is
supplied. The volume
is programmed by supplying a ground potential to these
inputs.
Melody, Pin 7 (9)
The melody input inverts the activation phase of the
bridge push-pull output stage. The input is CMOS-
compatible and suitable for processing ringing
frequencies.
Supply Voltage V
DD,
Pin 10 (12)
An external load, such as a microcomputer, can be
connected to V
DD
. This value of V
DD
is 3.5 V for a
maximum load current of 1.5 mA. V
DD
is highly resistive
and can block up to 6 V in call and idle states. The typical
value of the back-up capacitor is 47 F.
Frequency Detection 2f,
Pin 4 (5)
Frequency detection takes place in the microcomputer.
For this purpose, the output 2f supplies a square wave
signal
with
double
ringing
microcomputer. The output signal is CMOS-compatible.
This terminal is highly resistive in idle and call states.
frequency
to
the
Comparator Threshold Adjustment
TH
Pin 3 (4)
The on/ off threshold of the 2f comparator can be adjusted
(terminal against ground respectively V
DD
). To fulfill the
Bundespost specification this terminal should be open.
V
DC,
Pin 8, 9
Decoupling diode for dc supply.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| U4076B | Three-Tone Ringer for Telephone Sets |
| U4076B-FL | Three-Tone Ringer for Telephone Sets |
| U4078B | Tone Ringer Interface with DC/DC Converter |
| U4080B | Voice-Switched Circuit for Handsfree Operation |
| U4083 | Low-Power Audio Amplifier for Telephone Applications |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| U4076B | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:Three-Tone Ringer for Telephone Sets |
| U4076B-FL | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:Three-Tone Ringer for Telephone Sets |
| U4077B | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:TELEFUNK ELECTRONIC CREATIVE TECHNOLOGIEN U2200B-FP |
| U4078B | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:Tone Ringer Interface with DC/DC Converter |
| U4080B | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:Voice-Switched Circuit for Handsfree Operation |
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