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參數(shù)資料
| 型號： | 935260608112 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | TELEPHONE MULTIFUNCTION CKT, PDSO28 |
| 封裝： | PLASTIC, SOT-136, SO-28 |
| 文件頁數(shù)： | 50/56頁 |
| 文件大小： | 360K |
| 代理商： | 935260608112 |
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voltage at pin VDD is regulated at 3.3 V to supply the dialler and ringer parts and peripheral circuits.
Dialler part
The dialler and ringer parts of the IC are responsible for the system control, system settings and the generation and detection of various
signals.
The dialler offers a 32-digit last number redial function. The UBA2051x offers in addition 13 memories (3 direct + 10 indirect) of 21 digits.
During pulse dialling the DMO output of the UBA205x can be used to decrease the line voltage. During tone dialling the LED output of the
UBA205xA is used to indicate DTMF dialling. A keytone is available if a valid key is pressed for the types UBA2050x and UBA2051C.
Ringer part
The ringer part offers a discriminator input which enables the MDY/TONE output as soon as a valid ring frequency is detected. It offers a
choice of 4 different 3-tone melodies and a 4-level volume control, both programmable via the keyboard. An external very low cost ringer
output stage for a buzzer is needed. Stabilized supply (V
DD) during ringer mode for dialler and ringer part is included.
Speech/transmission part
l
Low DC line voltage; operates down to 1.45 V (excluding voltage drop over external polarity guard)
l
Line voltage regulator with adjustable DC voltage
l
Regulated 3.3 V supply (V
DD) for the dialler part and peripherals compatible with:
- Speech mode
- Ringer mode
- Trickle mode.
l
Unregulated supply (V
CC) for the transmission part and peripherals
l
Transmit stage with:
- Microphone amplifier with symmetrical high-impedance inputs
- DTMF input with confidence tone on receive output.
l
Receive stage with:
- Receive amplifier with asymmetrical output
- Earpiece amplifier with adjustable gain (and gain boost facility) for all types of earpieces.
l
AGC: line loss compensation for microphone and receive amplifiers.
Dialler part
l
Last Number Redial (LNR) (32 digits)
l
Pulse dialling:
- 10 PPS and 20 PPS (resistor option)
- M/B 2 : 3 and 1 : 2 (resistor option).
l
DTMF timing:
Features
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