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參數(shù)資料
| 型號： | SI2400URT-EVB |
| 廠商： | Silicon Laboratories Inc |
| 文件頁數(shù)： | 80/94頁 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL FOR SI2400 ISOMODEM |
| 標準包裝： | 1 |
| 系列： | ISOmodem® |
| 主要目的： | 電信，調(diào)制解調(diào)器 |
| 嵌入式： | 否 |
| 已用 IC / 零件： | SI2400 |
| 主要屬性： | 雙路 RJ-11 連接至電話線路，音頻連接器 |
| 次要屬性： | RS-232，TTL 串行和 USB 接口 |
| 已供物品： | 板，調(diào)制解調(diào)器，電源 |
| 相關產(chǎn)品： | SI2400-BS-ND - IC ISOMODEM SYSTEM-SIDE 16SOIC SI2400-FS-ND - IC ISOMODEM SYST-SIDE DAA 16SOIC 336-1093-ND - IC ISOMODEM SYSTEM-SIDE 16SOIC |
| 其它名稱： | 336-1166 |
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Si2400
Rev. 1.3
81
state. It will take approximately one second to return to
normal dc operating conditions. The BTD and ROV bits
are sticky, and they must be written to zero to be reset.
After the BTE, ROV, and BTD bits are all cleared, the
BTE bit can be set to reenable billing tone detection.
Certain line events, such as an off-hook event on a
parallel phone or a polarity reversal, may trigger the
ROV or the BTD bits, after which the billing tone detector
must be reset. The user should look for multiple events
before qualifying whether billing tones are actually
present.
Although the DAA will remain off-hook during a billing
tone event, the received data from the line will be
corrupted (or a modem disconnect or retrain may occur)
in the presence of large billing tones. 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/customers.
Alternatively, when a billing tone is detected, the host
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 Si3015 can
remain off-hook during a billing tone event, but modem
data will be lost [or a modem disconnect or retrain may
occur] 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 18 shows an example billing tone filter.
Figure 19 shows the billing tone filter and the ringer
impedance network for the Czech Republic. Both of
these circuits may be combined into a single external
dongle.
L3 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 18. Billing Tone Filter
‘
Figure 19. Dongle Applications Circuit
Table 29. Component Values—Optional Billing
Tone Filters
Symbol
Value
C1,C2
0.027
μF, 50 V, ±10%
C3
0.01
μF, 250 V, ±10%
L3
3.3 mH, >120 mA, <10
Ω, ±10%
L4
10 mH, >40 mA, <10
Ω, ±10%
L4
C3
RIN G
TIP
FR O M
LINE
To
DAA
C1
C2
L3
TIP
RING
L3
3.3 mH, 120 mA
C1
0.027
F, 50 V
C2
0.027
F, 50 V
From
Line
To
Si3015
Chipset
L4
3.3 mH, 40 mA
C3
0.01
F, 250 V
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相關代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SI2401 | 制造商:SILABS 制造商全稱:SILABS 功能描述:V.22BIS ISOMODEM㈢ WITH LOW-COST DAA |
| SI2401-C-FS | 制造商:Silicon Laboratories Inc 功能描述: |
| SI2401DC-EVB | 功能描述:子卡和OEM板 SI2401 Daughter Card RoHS:否 制造商:BeagleBoard by CircuitCo 產(chǎn)品:BeagleBone LCD4 Boards 用于:BeagleBone - BB-Bone - Open Source Development Kit |
| SI2401-FS | 功能描述:電信線路管理 IC 2400b/s System Side 3rd Gen DAA Tech RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray |
| Si2401FS08-EVB | 功能描述:網(wǎng)絡開發(fā)工具 Si2401+Si3008 ISO modem Eval Board RoHS:否 制造商:Rabbit Semiconductor 產(chǎn)品:Development Kits 類型:Ethernet to Wi-Fi Bridges 工具用于評估:RCM6600W 數(shù)據(jù)速率:20 Mbps, 40 Mbps 接口類型:802.11 b/g, Ethernet 工作電源電壓:3.3 V |
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