|
|
PDF U4091BM-N Data sheet ( Hoja de datos )
| Número de pieza | U4091BM-N | |
| Descripción | Programmable Telephone Audio Processor | |
| Fabricantes | ATMEL Corporation | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de U4091BM-N (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
|
No Preview Available !
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
1 page  
U4091BM-N
Pin Description
Pin Symbol Function
1 RECIN Receive amplifier input(1)
2 TXACL Time constant adjustment for transmit anti-clipping
3
MIC3
Microphone input for hands-free operation
4
MIC2
Input of symmetrical microphone amplifier with high common-mode rejection ratio
5
MIC1
Input of symmetrical microphone amplifier with high common-mode rejection ratio
6 RECO2 Output of the receive amplifier
7 RECO1 Output of the receive amplifier, also used for sidetone network
8I
ND
The internal equivalent inductance of the circuit is proportional to the value of the capacitor at this pin. A
resistor connected to ground may be used to adjust the DC mask.
9 VL Positive supply-voltage input to the device in speech mode
10 SENSE Input for sensing the available line current
11
GND
Ground, reference point for DC and AC signals
12 VB Unstabilized supply voltage for speech network
13 SAO2 Negative output of speaker amplifier (push-pull only)
14 SAO1 Positive output of speaker amplifier (single ended and push-pull operation)
15 VMPS Unregulated supply voltage for the microcontroller (via series regulator to VMP)
16
VMP
Regulated output voltage for supplying the microcontroller (typically 3.3 V/6 mA in speech mode)
17
VMIC
Reference node for microphone amplifier, supply for electret microphones
18 TSACL Time constant for speaker amplifier anti-clipping
19 VRING Input for ringer supply
20
IMPA
Input for adjusting the ringer input impedance
21 COSC 70-kHz oscillator for ringing power converter
22 SWOUT Output for driving the external switch resistor
23 INT Interrupt line for serial bus
24 SCL Clock input for serial bus
25
SDA
Data line for serial bus
26 OSCIN Input for 3.58-MHz oscillator
27 RESET Reset output for the microcontroller
28 OSCOUT Clock output for the microcontroller
29 ES Input for external supply indication
30
ADIN
Input of A/D converter
31 BNMR Output of background-noise monitor receive
32 BNMT Output of background-noise monitor transmit
33 CT Time constant for mode switching of voice switch
34 TLDR Time constant of receive-level detector
35 INLDR Input of receive-level detector
36 INLDT Input of transmit-level detector
37
TLDT
Time constant of transmit-level detector
38 IMPSW Switch for additional line impedance
Note: 1. The protection device at Pin RECIN is disconnected.
4666B–CORD–08/04
5
5 Page 
U4091BM-N
Figure 5. Write Cycle
CLOCK
Write cycle
DATA
D7 D6 D5 D4 D3 D2 D1 D0 A3 A2 A1 A0 R/W=0
Data from µP
Strobe
from µP
Figure 6. Normal Read Cycle
CLOCK
Normal read cycle
DATA
A3 A2 A1 A0 R/W=1
Data from µP
Strobe
from µP
D7 D6 D5 D4 D3 D2 D1 D0
Data from U4091B
Figure 7. Fast Read Cycle
CLOCK
Fast read cycle
DATA
Strobe
from µP
D7=IZC D6=IVE
Data from U4091B
4666B–CORD–08/04
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet U4091BM-N.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| U4091BM-N | Programmable Telephone Audio Processor | ATMEL Corporation |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |