|
|
PDF MSM7705 Data sheet ( Hoja de datos )
| Número de pieza | MSM7705 | |
| Descripción | 4ch Single Rail CODEC | |
| Fabricantes | OKI electronic componets | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de MSM7705 (archivo pdf) en la parte inferior de esta página. Total 20 Páginas | ||
|
No Preview Available !
E2U0042-28-81
¡¡SemicondSucetormiconductor
MSM7705-01/02/03
4ch Single Rail CODEC
This vMerSsMio7n7: 0A5u-0g1. /10929/803
Previous version: Nov. 1996
GENERAL DESCRIPTION
The MSM7705-01/02/03 are four-channel CODEC CMOS ICs for voice signals ranging from 300
to 3400 Hz. These devices contain filters for A/D and D/A conversion.
Designed especially for a single-power supply and low-power applications, these devices
contain four-channel A/D and D/A converters in a single chip and achieve a reduced footprint
and a reduced number of external components.
The MSM7705-01/02/03 are best suited for digital telephone terminals, digital PABXs, and push-
button phones.
FEATURES
• Single power supply: +5 V
• Power consumption
Operating mode:
70 mW Typ. 140 mW Max.
Power-saving mode:
14 mW Typ.
32 mW Max.
Power-down mode:
0.05 mW Typ.
0.3 mW Max.
• Conforms to ITU-T Companding law
MSM7705-01: m/A-law pin-selectable
MSM7705-02: m-law
MSM7705-03: A-law
• Built-in PLL eliminates a master clock
• The PCM interface can be switched between 4 channel serial/parallel
• Transmission clock: 64/128/256/512/1024/2048 kHz
96/192/384/768/1536/1544 kHz
(During 4 channel serial mode, the 64, 96, 128, and 192 kHz clocks are
disabled)
• Transmit gain adjustable for each channel
• Built-in reference voltage supply
• Analog output can directly drive a 600 W line transformer
• Package:
44-pin plastic QFP (QFP44-P-910-0.80-2K) (Product name : MSM7705-01GS-2K)
(Product name : MSM7705-02GS-2K)
(Product name : MSM7705-03GS-2K)
1/20
1 page  
¡ Semiconductor
MSM7705-01/02/03
DIN1, DIN2, DIN3
PCM signal inputs for channels 1, 2, and 3 when the parallel mode is selected.
D/A conversion is performed by the serial PCM signals to these pins, the RSYNC signals
synchronous with the serial PCM signals, and the BCLK signal. Then the analog signals are
output from AOUT1, AOUT2, and AOUT3 pins, respectively.
The data rate of the PCM signal is equal to the frequency of the BCLK signal.
The PCM signal is shifted at the falling edge of the BCLK signal and latched into the internal
register when shifted by eight bits.
The start of the PCM data (MSD) is identified at the rising edge of RSYNC.
When the serial mode is selected, this pin is not used and should be connected to GND (0 V).
DIN4
PCM signal input for channel 4 when the parallel mode is selected.
D/A conversion is performed by the serial PCM signal to this pin, the RSYNC signal synchronous
with the serial PCM signal, and the BCLK signal. Then the analog signal is output from AOUT4
pin.
The data rate of the PCM signal is equal to the frequency of the BCLK signal.
The PCM signal is shifted at the falling edge of the BCLK signal and latched into the internal
register when shifted by eight bits.
The start of the PCM data (MSD) is identified at the rising edge of RSYNC.
When the serial mode is selected, this pin is used for the 4ch multiplexed PCM signal input.
BCLK
Shift clock signal input for DIN1, DIN2, DIN3, DIN4, DOUT1, DOUT2, DOUT3, and DOUT4.
The frequency is equal to the data rate. Setting this signal to logic "1" or "0" drives both transmit
and receive circuits to the power saving state.
RSYNC
Receive synchronizing signal input.
Eight bits of PCM data required are selected from a series of PCM signal to the DIN1, DIN2, DIN3,
and DIN4 pins by the receive synchronizing signal.
All timing signals in the receive section are synchronized by this synchronizing signal. This
signal must be synchronized in phase with the BCLK (generated from the same clock source as
BCLK). The frequency should be 8 kHz ±50 ppm to guarantee the AC characteristics which are
mainly the frequency characteristics of the receive section.
However, this device operates in the range of 6 kHz to 10 kHz unless the frequency characteristics
of the system used are strictly specified, but the electrical characteristics specified in the data
sheet are not guaranteed.
5/20
5 Page 
¡ Semiconductor
MSM7705-01/02/03
AC Characteristics
(VDD = +5 V ±5%, Ta = –30°C to +85°C)
Parameter
Symbol
Loss T1
Loss T2
Transmit Frequency Response
Loss T3
Loss T4
Loss T5
Loss T6
Loss R1
Loss R2
Receive Frequency Response
Loss R3
Loss R4
Loss R5
SD T1
SD T2
Transmit Signal to Distortion Ratio SD T3
SD T4
SD T5
SD R1
SD R2
Receive Signal to Distortion Ratio SD R3
SD R4
SD R5
GT T1
GT T2
Transmit Gain Tracking
GT T3
GT T4
GT T5
GT R1
GT R2
Receive Gain Tracking
GT R3
GT R4
GT R5
Freq.
(Hz)
60
300
1020
2020
3000
3400
300
1020
2020
3000
3400
1020
1020
1020
1020
Level Condition
(dBm0)
0
0
3
0
–30 *1
–40
–45
3
0
–30 *1
–40
–45
3
–10
–40
–50
–55
3
–10
–40
–50
–55
Min.
20
–0.15
–0.15
–0.15
0
–0.15
–0.15
–0.15
0.0
35
35
35
29
24
36
36
36
30
25
–0.3
–0.3
–0.5
–1.2
–0.3
–0.3
–0.5
–1.2
Typ. Max.
26
+0.07
Reference
–0.04
+0.03
0.40
–0.03
Reference
+0.04
+0.11
0.47
43
41
38
31.5
27
43
41
40
33.5
30
+0.02
Reference
+0.04
+0.15
+0.40
0.0
Reference
+0.04
+0.16
+0.37
—
+0.20
+0.20
+0.20
0.80
+0.20
+0.20
+0.20
0.80
—
—
—
—
—
—
—
—
—
—
+0.3
+0.3
+0.5
+1.2
+0.3
+0.3
+0.5
+1.2
Unit
dB
dB
dB
dB
dB
dB
*1 Psophometric filter is used
11/20
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet MSM7705.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| MSM7702 | Single Rail CODEC | OKI electronic componets |
| MSM7704 | 2ch Single Rail CODEC | OKI electronic componets |
| MSM7704-01 | 2ch Single Rail CODEC |  LAPIS |
| MSM7705 | 4ch Single Rail CODEC | OKI electronic componets |
| 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 |