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U3810BM 데이터시트 PDF




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부품번호 U3810BM 기능
기능 Multi Standard Feature Phone Integrated Circuit
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U3810BM 데이터시트, 핀배열, 회로
TELEFUNKEN Semiconductors
U3810BM
Multi Standard Feature Phone Integrated Circuit
Description
The U3810BM multi-standard feature phone circuit is
designed to be used with a microcontroller using a 2-wire
serial bus. It performs all speech and line interface
functions required in an electronic telephone set: the
ringing function with switching regulator and melody
generator, the DTMF dialling, the loudhearing with
antilarsen and antidistortion systems, a power supply, a
clock and a reset for the microcontroller. Transmit, receive
and loudhearing gains control / AGC range / DTMF
frequencies, pre-emphasis and level / melody generator,
and mutes are programmable through the serial bus.
Block diagramm
Speech
circuit
LH
Loudhearing
and
Tone ringing
DTMF
dialer
Tone
ringer
Figure 1
MC
with
EEPROM
93 7600 e
Applications
D Feature phones
D Answering machines
D Fax machines
Rev. A1: 19.01.1996
Benefits
D Complete system integration of analog signal
processing and digital control circuitry
D One IC for various PTT standards, e.g. programmable
specification via mC
D Only three low-cost transducers needed (instead of
four)
1 (31)




U3810BM pdf, 반도체, 판매, 대치품
U3810BM
TELEFUNKEN Semiconductors
TAD IOS
COS IMPA VRI
RPI
THA ZCO ESI
XCK RESET
TAL
VDD
VCC
VL
SAI
SAIX
VSA
SO1
SO2
GND
RREF
ISQ
SQUELCH
ANTI–
LARSEN
IAL
ANTI–
DISTORTION
9
3
3
NEA0,1,2
EA
CO
MELODY–/
DTMF–
GENERATOR
AMF
SIN0,1
M0,1,2,3,4
SERIAL
BUS
8
4
MIS IM
TX0,1,2
IR
RX0,1,2,6
LVIO
C
D
MF
STS
RECI
STL
RECOX
RECO1
IE1 IE2
RECO2
AGA/
SIDETONE–
BALANCING
IT
TX6
EC
AR0,1 AT0,1
BAL0,1,2
IAGC IBAL
CEI RDC AGA MICX MIC1 MIC2 ZAC TO MICO TIN
TACL
signal path (analog)
control path (digital)
94 9330
Figure 3 Digital adjustment of the analog parameters by the serial bus microprocessor-interface
4 (31)
Rev. A1: 19.01.1996

4페이지










U3810BM 전자부품, 판매, 대치품
TELEFUNKEN Semiconductors
U3810BM
Pin description
Pin Symbol
1 RPI
2 VRI
3 IMPA
4 COS
5 IOS
6 TAD
7 TAL
8 VDD
9 VCC
10 VL
11 SAI
12 SAIX
13 VSA
14 SO1
15 SO2
Function
Ringing power information. The RC combination smooths the drive current of the
loudspeaker amplifier.
Tone-ringer supply voltage. The rectified ringing voltage is delivered to VRI and then
converted into the lower supply voltage, VSA, by the converter.
External adjustment of input ringing impedance. IMPA is adjusted with a resistance
between pin 2 and 3. ZIN = RIN/100
Control output switching supply. COS drives the base of the external switching transis-
tor of the converter.
Current output of switching supply. This output provides a constant current, which
supplies the external part of converter. The magnitude of the current depends on the
VRI voltage and the value of resistance RIN.
Adjustment of antidistortion time constant in loudhearing with external RC
combination.
Adjustment of antilarsen time constant in loudhearing with external RC combination.
External logic supply.
Power supply for peripherals. VCC and VDD are stabilized supply voltages buffered
with external capacitors. They are derived internally from the same voltage source, but
are separated from each other by electronic switches. VDD also supplies the digital
part of the circuit and is achieved in all three modes: speech mode, ringing mode and
operation with external supply. According to the application, peripherial modules are
connected to VDD which, in addition to speech mode, must be supplied at least in one
of the two other modes. The digital part of circuit and microprocessor must continue
operating during line breaks, as they occur during pulse dialing or during flash-signal
transmission. Since VDD in this time intervals is fed only from the buffer capacity, the
power consumption from VDD must not cause the total voltage dump. VCC supplies
no internal parts of circuit and is supplied exclusively in speech mode. External
components, which must operate only in this mode, can be connected here. The power
is drawn only from the relevant buffer capacitor in the supply intervals during pulse
dialing or flash-signal transmission.
Line voltage.
Speaker amplifier input. The signal coming from the receive part, e.g. from REC01 or
RECO2, is fed in here.
Speaker amplifier input for special application i.e. answering machine. SAIX is
selected via the serial bus. SAIX has to be selected for ringing. IF ringing, Antidistor-
tion and Antilarsen are disabled.
Supply voltage for the loudhearing amplifier. Stabilized supply voltage buffered with
an external capacitor for the loudhearing amplifier and zero crossing detector; aditional
connection point for an external supply. In speech mode, VSA is supplied by the
analog part of the circuit. In this case, the stabilization point is adjusted to the DC line
voltage VSA= VL/1.5. In ringing mode, and VSA is supplied directly from the con-
verter. The stabilization point is permanently set. The logic supply, VDD, is fed by a
switch from VSA. VSA=5.2V. In the case of an external supply, VSA serves as a point
for a current from a power supply. The stabilization point of VSA and supply for the
logic correspond to the operation conditions in ringing mode.
Loudspeaker output 1.
Loudspeaker output 2. Differential output of loudhearing amplifier. The loudspeaker
can also be connected asymmetrically to ground or to VSA via a capacitor at one of the
two outputs. As a result of this connection there is a bigger output power in reference
to low line currents and loudspeakers with low impedance, while the differential
connection method results in a higher power output and lower harmonic distortion with
medium or high line currents and/or loudspeaker impedances
Rev. A1: 19.01.1996
7 (31)

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부품번호상세설명 및 기능제조사
U3810BM

Multi Standard Feature Phone Integrated Circuit

TEMIC Semiconductors
TEMIC Semiconductors

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