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參數(shù)資料
| 型號(hào)： | U3810BM |
| 英文描述： | Multi Standard Feature Phone Integrated Circuit |
| 中文描述： | 多標(biāo)準(zhǔn)功能手機(jī)集成電路 |
| 文件頁數(shù)： | 2/31頁 |
| 文件大?。?/td> | 497K |
| 代理商： | U3810BM |
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TELEFUNKEN Semiconductors
U3810BM
Rev. A1: 19.01.1996
2 (31)
Features
Slope of DC characteristics adjustable by an external
resistor
Gain of transmit and receive amplifiers automatically
adjusted by line length control
Regulation range adjustable by the serial bus
Possibility of fixed gain (PABX)
Sidetone balancing system adjustable with line length
or by the serial bus
Dynamic
components
impedance
adjustable
by
external
Stabilized power supply for peripherals
Confidence level during dialling
+6 dB possibility on second stage transmit gain
Transmit and receive gains adjustable by serial bus
Extra transmit input for handsfree and answering
machine purpose
+6 dB possibility on receive gain
Receive amplifier for dynamic or piezo-electric
earpieces
Extra receive output for handsfree purpose
High impedance microphone inputs suitable for
dynamic,
magnetic,
piezo-electric
microphone
or
electret
Distortion of line signal and sidetone prevented by
dynamic
range
limitation
(anti-clipping)
in
transmission
Squelch system in transmission prevents “room noise”
are being transmitted, and improves anti-larsen
efficiency (can be inhibited).
Loudhearing gain programmable in eight steps of 4 dB,
using the serial bus, or linearly adjusted, using a
potentiometer
Anti-larsen system efficiency is increased when
inhibiting squelch
Loudhearing anti-distortion system by automatic gain
control versus available current and voltage
Switching regulator in ringing phase
Input ringing detection, threshold and impedance
adjustable with external resistors
Ringing zero crossing information for external
microprocessor
Ringing programmable gain in eight steps of 4 dB using
the serial bus
Melody generator, with 30 frequencies in steps of semi
tones, driven by serial bus
Internal speed-up circuit permits a faster charge of
VDD and VCC capacitor
DTMF dialer driven by serial bus, in particular level
and pre-emphasis adjustment
Ability to transmit a confidence tone in speech mode
using melody generator frequencies
Five independent mutes driven by serial bus (two in
transmission, two in reception, one for the transmit /
receive loop)
Standard low-cost ceramic 455 kHz / clock output for
the microcontroller
Extra loudhearing input for answering machines,
handsfree and base station of phones cordless with
loudhearing
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