參數(shù)資料
型號(hào)： SI3012-KS
廠商： Electronic Theatre Controls, Inc.
英文描述： GLOBAL MC 97 SILICON DAA
中文描述： 全球三菱商事97硅DAA
文件頁(yè)數(shù)： 27/64頁(yè)
文件大小： 1740K
代理商： SI3012-KS
Si3038
Rev. 2.01
27
Figure 24. AC-Link Power-Down/Up Sequence
Although the DAA will remain off-hook during a billing
tone event, the received data from the line will be
corrupted when a billing tone occurs. If the user wishes
to receive data through a billing tone, an external LC
filter must be added. A modem manufacturer can
provide this filter to users in the form of a dongle that
connects on the phone line before the DAA. This keeps
the manufacturer from having to include a costly LC filter
internal to the modem when it may only be necessary to
support a few countries.
Alternatively, when a billing tone is detected, the system
software may notify the user that a billing tone has
occurred. This notification can be used to prompt the
user to contact the telephone company and have the
billing tones disabled or to purchase an external LC filter.
Billing Tone Filter (Optional)
In order to operate without degradation during billing
tones in Germany, Switzerland, and South Africa, an
external LC notch filter is required. (The Si3038 can
remain off-hook during a billing tone event, but modem
data will be lost in the presence of large billing tone
signals.) The notch filter design requires two notches,
one at 12 KHz and one at 16 KHz. Because these
components are fairly expensive and few countries
supply billing tone support, this filter is typically placed
in an external dongle or added as a population option
for these countries. Figure 25 shows an example billing
tone filter.
L1 must carry the entire loop current. The series
resistance of the inductors is important to achieve a
narrow and deep notch. This design has more than
25 dB of attenuation at both 12 KHz and 16 KHz.
Figure 25. Billing Tone Filter
‘
The billing tone filter effects the ac termination and
return loss. The current complex ac termination will
pass worldwide return loss specifications both with and
without the billing tone filter by at least 3 dB. The ac
termination is optimized for frequency response and
hybrid cancellation, while having greater than 4 dB of
margin with or without the dongle for South Africa,
Australia, CTR21, and German and Swiss country-
specific specifications.
SYNC
BIT_CLK
SDATA_OUT
Power Down Frame
Sleep State
Wake Event
New Audio Frame
slot 12
prev. frame
TAG
W rite to
56th
Data
MLNK
TAG
Slot 1
Slot 2
SDATA_IN
TAG
TAG
Slot 1
Slot 2
slot 12
prev. frame
Table 20. Component Values—Optional Billing
Tone Filters
Symbol
Value
C1,C2
0.027
μ
F, 50 V, ±10%
C3
0.01
μ
F, 250 V, ±10%
L1
3.3 mH, >120 mA, <10
, ±10%
L2
10 mH, >40 mA, <10
, ±10%
L2
C3
RING
TIP
From
Line
To
DAA
C1
C2
L1
相關(guān)PDF資料
PDF描述
SI3012 3.3 V FCC/JATE DIRECT ACCESS ARRANGEMENT
SI3012-KT 3.3 V FCC/JATE DIRECT ACCESS ARRANGEMENT
SI3035 3.3 V FCC/JATE DIRECT ACCESS ARRANGEMENT
SI3034 DESICCANT CLAY, 30G, PK400; RoHS Compliant: NA
SI3036 Masking Tape; Tape Backing Material:Crepe Paper; Width:24mm; Roll Length:55m; Adhesive Material:Rubber; Color:Natural; Leaded Process Compatible:No; Pack Quantity:1 RoHS Compliant: Yes
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SI3012-KSR 制造商:Silicon Laboratories Inc 功能描述:
SI-3012KS-TL 制造商:Sanken Electric Co Ltd 功能描述:IC REG LDO ADJ 1A 8SOIC
SI3012-KT 制造商:未知廠家 制造商全稱:未知廠家 功能描述:GLOBAL MC 97 SILICON DAA
SI-3012LU 制造商:SANKEN 制造商全稱:Sanken electric 功能描述:Surface-Mount, Low Current Consumption, Low Dropout Voltage Dropper Type
SI-3012LU-TL 制造商:Sanken Electric Co Ltd 功能描述:IC REG LDO ADJ 0.25A SOT89-5
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