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參數(shù)資料
| 型號： | 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 |
| 文件頁數(shù)： | 23/64頁 |
| 文件大?。?/td> | 1740K |
| 代理商： | SI3012-KS |
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Si3038
Rev. 2.01
23
mode interference, or noise coupling. As shown in
Figure 19 on page 16, the C1, C2, C4, C24, and C25
capacitors isolate the Si3024 (system-side) from the
Si3014 (line-side). All transmit, receive, control, ring
detect, and caller ID data are communicated through
this barrier. Y2 class capacitors may be used for the
isolation barrier to achieve surge performance of 5 kV or
greater.
The ISOcap communications link is disabled by default.
The PR bits in register 3Eh must be cleared, and the
sample rate must be set in register 40h/42h. No
communication between the Si3024 and Si3014 can
occur until these conditions are set.
Off-Hook
The communication system generates an off-hook
command by writing a logic 1 to bit 0 (line 1) or bit 10
(line 2) of slot 12. The off-hook state is used to seize the
line for an incoming/outgoing call and can also be used
for pulse dialing. When in the on-hook state, negligible
dc current flows through the hookswitch. In the off-hook
state, the hookswitch transistor pair, Q1 and Q2, turn
on.
The net effect of the off-hook signal is the application of
a termination impedance across TIP and RING and the
flow of dc loop current. The termination impedance has
both an ac and dc component.
When executing an off-hook sequence, the Si3038
requires 1548/Fs seconds to complete the off-hook and
provide phone line data on the ac link. This includes the
12/Fs filter group delay. If necessary, for the shortest
delay, a higher Fs may be established prior to executing
the off-hook. The delay allows line transients to settle
prior to normal use.
DC Termination
The Si3038 has three programmable dc termination
modes, selected with the DCT[1:0] bits in register 5Ch.
Japan Mode (DCT[1:0] = 01 b), shown in Figure 21, is a
lower voltage mode and supports a transmit full scale
level of –2.71 dBm. Higher transmit levels for DTMF
dialing are also supported. See “DTMF Dialing” on
page 26. The low voltage requirement is dictated by
countries such as Japan and Malaysia.
Australia has separate dc termination requirements for
line seizure versus line hold. The designer can use
Japan mode to satisfy both requirements. However, if it
is desirable to have a higher transmit level for modem
operation, the designer can switch to FCC mode
500 ms after the initial off-hook. This will also satisfy the
Australian dc termination requirements.
.
Figure 21. Japan Mode I/V Characteristics
FCC Mode (DCT[1:0] = 10 b), shown in Figure 22, is the
default dc termination mode and supports a transmit full
scale level of –1 dBm at TIP and RING. This mode
meets FCC requirements in addition to the requirements
of many other countries.
Figure 22. FCC Mode I/V Characteristics
CTR21 Mode (DCT[1:0] = 11 b), shown in Figure 23,
provides current limiting, while maintaining a transmit
full scale level of –1 dBm at TIP and RING. In this mode,
the dc termination will current limit before reaching
60 mA.
10.5
10
9.5
9
8.5
8
7.5
7
6.5
.01 .02 .03 .04 .05 .06 .07 .08 .09 .1
Loop Current (A)
Japan DCT Mode
V
6
5.5
.11
12
11
10
9
8
7
6
FCC DCT Mode
.01 .02 .03 .04 .05 .06 .07 .08 .09 .1 .11
Loop Current (A)
V
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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