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參數(shù)資料
| 型號： | MT9125 |
| 廠商： | Mitel Networks Corporation |
| 英文描述： | Dual ADPCM Transcoder(雙ADPCM編解碼器) |
| 中文描述： | 雙差分PcM轉(zhuǎn)碼器（雙差分PcM編解碼器） |
| 文件頁數(shù)： | 10/20頁 |
| 文件大?。?/td> | 172K |
| 代理商： | MT9125 |
MT9125
Preliminary Information
8-82
configuration the ENB1 and ENB2 inputs are
ignored. If F0i is tied continuously to V
SS
, then SSI
operation will be assumed and the transcoder will
use the strobes connected to ENB1 and ENB2 as its
internal reference.
Power-Down Operation (PWRDN)
To minimize power consumption a pin selected,
power-down option is provided. Device power down
is accomplished by forcing the PWRDN pin to V
SS
.
This asynchronous control forces all internal clocking
to halt and the C2o, EN1, EN2, DSTo and ADPCMo
outputs to become tri-stated. Upon returning
PWRDN to V
DD
coincident with the next alignment
signal, all outputs will return to their active state and
the internal clocks are re-started. In this mode the
ADPCM algorithm is not reset to the 'optional reset
values', however, the self-convergent nature of the
algorithm will ensure that convergence of the
(AD)PCM streams will occur within 3496 frames as
specified by CCITT G.721.
Removal of the BCLK and MCLK inputs is not
necessary during power-down mode. If the device is
released from power-down without a valid MCLK the
ADPCMo and PCMo outputs will become active,
driving either continuous logic high or logic low, until
a MCLK signal is applied to resume internal
operation.
PWRDN is a schmidt trigger input.
Applications
Various configurations of Pair Gain drops are
depicted in Figures 7, 8 and 9. These show
applications using mixed ST-BUS/SSI, all ST-BUS
and all SSI implementations. Figure10 shows an ST-
BUS line card application for Pair Gain while Figure
11 shows a 2-channel, wireless-set, base station
application based upon ST-BUS.
Figure 9 - Pair Gain Application (SSI/SSI)
T
R
T
R
T
R
T
R
D
X
D
R
FS
X
FS
R
BCLK
X
MCLK
X
V
FxL-
V
FRO
V
FxL+
D
X
D
R
FS
X
FS
R
BCLK
X
MCLK
X
V
FxL-
V
FRO
V
FxL+
D
X
D
R
FS
X
FS
R
BCLK
X
MCLK
X
V
FxL-
V
FRO
V
FxL+
D
X
D
R
FS
X
FS
R
BCLK
X
MCLK
X
V
FxL-
V
FRO
V
FxL+
Gate
Array
Ring
Generator
to SLICs
Hookswitch
from SLICs
T
R
L
in
+
L
in
-
L
out
+
L
out
-
BCLK
MCLK
TX
RX
EN1
EN2
MT9125
BCLK
F0i
MCLK
ADPCMi
ADPCMo
ENA
ENS
DSTi
DSTo
ENB1
ENB2
V
DD
MT9125
BCLK
F0i
MCLK
ADPCMi
ADPCMo
ENA
ENS
DSTi
DSTo
ENB1
ENB2
V
DD
S
L
I
C
S
L
I
C
S
L
I
C
S
L
I
C
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MT9125AE | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:CMOS Dual ADPCM Transcoder |
| MT9125AP | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:CMOS Dual ADPCM Transcoder |
| MT9126 | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:CMOS Quad ADPCM Transcoder |
| MT9126AE | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:CMOS Quad ADPCM Transcoder |
| MT9126AE1 | 制造商:Microsemi Corporation 功能描述:ADPCM VOICE COMPRESSION G.726 16KBPS/24KBPS/32KBPS 5V 28PDIP - Rail/Tube 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC TRANSCODER QUAD ADPCM 28PDIP 制造商:Microsemi Corporation 功能描述:IC TRANSCODER QUAD ADPCM 28PDIP |
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