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U4091BM-N PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 U4091BM-N
기능 Programmable Telephone Audio Processor
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U4091BM-N 데이터시트, 핀배열, 회로
Features
Speech Circuit with Anti-clipping
Tone-ringer Interface with DC/DC Converter
Speaker Amplifier with Anti-distortion
Power-supply Management (Regulated, Unregulated) and a Special Supply for Electret
Microphone
Voice Switch
Interface for Answering Machine and Cordless Phone
Applications
Feature Phone
Answering Machine
Fax Machine
Speaker Phone
Cordless Phone
Programmable
Telephone
Audio
Processor
Benefits
No Piezoelectric Transducer for Tone Ringing Necessary
Complete System Integration of Analog Signal Processing on One Chip
Very Few External Components
U4091BM-N
Description
The programmable telephone audio processor U4091BM-N is a linear integrated cir-
cuit for use in feature phones, answering machines and fax machines. It contains the
speech circuit, tone-ringer interface with DC/DC converter, sidetone equivalent and
ear-protection rectifiers. The circuit is line-powered and contains all components nec-
essary for signal amplification and adaptation to the line. The U4091BM-N can also be
supplied via an external power supply. An integrated voice switch with loudspeaker
amplifier enables hands-free or loudhearing operation. With an anti-feedback function,
acoustic feedback during loudhearing can be reduced significantly. The generated
supply voltage is suitable for a wide range of peripheral circuits.
Rev. 4666B–CORD–08/04
http://www.Datasheet4U.com




U4091BM-N pdf, 반도체, 판매, 대치품
Pin Configuration
Figure 3. Pinning SSO44
RECIN 1
TXACL 2
MIC3 3
MIC2 4
MIC1 5
RECO2 6
RECO1 7
IND 8
VL 9
SENSE 10
GND 11
VB 12
SAO2 13
SAO1 14
VMPS 15
VMP 16
VMIC 17
TSACL 18
VRING 19
IMPA 20
COSC 21
SWOUT 22
44 STRC
43 STC
42 STO
41 AMREC
40 AMPB
39 MICO
38 IMPSW
37 TLDT
36 INLDT
U4091BM
35 INLDR
34 TLDR
33 CT
32 BNMT
31 BNMR
30 ADIN
29 ES
28 OSCOUT
27 RESET
26 OSCIN
25 SDA
24 SCL
23 INT
4 U4091BM-N
4666B–CORD–08/04

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U4091BM-N 전자부품, 판매, 대치품
U4091BM-N
3. Ringing:
During ringing, the supply for the system is fed into VB via the Ringing Power
Converter (RPC). Normally, the speaker amplifier in single-ended mode is used
for ringing. The frequency for the melody is generated by the DTMF/Melody
generator.
4. External supply:
In an answering machine, the chip is powered by an external supply via pin VB.
The answering machine connections can be directly made to U4091BM-N. The
answering machine is connected to the pin AMREC. For the output AMREC, an
AGC function is selectable via the serial bus. The output of the answering
machine will be connected to the pin AMPB, which is directly connected to the
switching matrix. This enables the signal to be switched to every desired output.
Figure 4. Supply Generator
V RL SENSE
10
C
1 µF
IND
R
+
-
R
300 k
V
5.5 V
VMPS
-
+ 3.3 V
470 µF
VMP
+
47 µF
- 5.5 V
VB
220 µF
Ringing Power
Converter (RPC)
Ringing Frequency
Detector (RFD)
The RPC transforms the input power at VRING (high voltage/low current) into an equiv-
alent output power at VB (low voltage/high current) which is capable of driving the low-
ohmic loudspeaker. The input impedance at VRING is adjustable from 3 kto 12 kby
RIMPA (ZRING = RIMPA/100) and the efficiency of the step-down converter is approxi-
mately 65%.
The U4091BM-N provides an output signal for the microcontroller. This output signal is
always double the value of the input signal (ringing frequency). It is generated by a cur-
rent comparator with hysteresis. The levels for the on-threshold are programmable in 16
steps, the off-level is fixed. Every change of the com parator output generates a high
level at the interrupt output INT . The information can then be r ead out by means of a
serial bus with either normal or fast read mode. The block RFD is always enabled.
Table 1. Threshold Level
RINGTH[0:3]
07
VRING
V
15 22 V
Step
1V
4666B–CORD–08/04
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부품번호상세설명 및 기능제조사
U4091BM-N

Programmable Telephone Audio Processor

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