參數(shù)資料
型號(hào)： PCT789T-A
英文描述： PCI HSP56 World MicroModem/PCT303DW/PCT1789W
中文描述： 世界MicroModem/PCT303DW/PCT1789W的PCI HSP56
文件頁數(shù)： 18/70頁
文件大?。?/td> 872K
代理商： PCT789T-A
PC-TEL, Inc.
18
1789W0DOCDAT06A-0299
PCT1789W DATA SHEET
PCT303DW F
UNCTIONAL
D
ESCRIPTION
!
PRELIMINARY
PRELIMINARY
Figure 8 Mode 2 I/V Characteristics (1,0)
Mode 3 (1,1) provides current limiting, while maintaining
a transmit level of –1 dBm at Tip and Ring. Figure 9
shows the I/V characteristics of mode 3. In mode 3, the
DC termination will current limit before reaching 60 mA.
Figure 9 Mode 3 I/V Characteristics (1,1)
The PCT303DW can be fully programmed to meet
international requirements, and the device is compliant
with FCC, NET4, CTR21, JATE, and country-specific
PTT specifications. Figure 2 outlines a limited set of line
interface configurations required to support CTR21 and
other key countries by setting different AC and DC
termination modes. See “Appendix: NET4 Country
Support” on page 65 for a more complete set of the line
interface configurations required to support NET4
countries.
Ring Detection
The ring signal is capacitively coupled from Tip and Ring
to the RNG1 and RNG2 pins. The PCT303DW supports
either full- or half-wave ring detection. With full-wave
ring detection, the designer can detect a polarity
reversal as well as the ring signal.
The ring detector output can be monitored in one of
three ways. The first method uses the RGDT pin. The
second method uses the register bits RDTP, RDTN, and
RDT of register 5. The final method uses the SDO
output.
The DSP must detect the frequency of the ring signal in
order to distinguish a ring from pulse dialing by
telephone
equipment
connected
necessary, the DSP can estimate the amplitude of the
ring signal based on the ring detect threshold and the
duty cycle of the ring detector output.
in
parallel.
If
The PCT303DW can be programmed for both ringer
impedance and ringer threshold as described in the
“Appendix: NET4 Country Support” on page 65.
12
11
10
9
8
7
6
Mode 2
.01 .02 .03 .04 .05 .06 .07 .08 .09 .1 .11
Loop Current (A)
V
45
40
35
30
25
20
15
10
5
.015
.02
.025
.03
Loop Current (A)
.035
.04
.045
.05
.055
.06
Mode 3
V
Table 8 Line Interface Configurations (Register 16)
AC
Termina-
tion
Bit 5
1. FCC
0
2. Australia
1
3. Japan
0
4. New Zealand
1
5. Singapore
a
0
6. South Africa
1
7. CTR21
b,c
1
Country
DC Termination
Bit 4
1
0
0
1
0
Bit 3
0
1
1
0
1
a.
Support for loop currents greater than or equal to
20 mA.
The PCT303DW can also be configured to meet
the individual specifications for these countries.
(See “Appendix: NET4 Country Support” on
page 65.)
CTR21 includes Austria, Belgium, Denmark,
Finland, France, Germany, Greece, Hungary,
Iceland,
Ireland,
Luxembourg, Netherlands, Norway, Portugal,
Spain, Sweden, Switzerland, and the UK.
1
1
0
1
b.
c.
Italy,
Liechtenstein,
相關(guān)PDF資料
PDF描述
PCX-150 150A QUASI- CW LASER DIODE DRIVER/PULSED CURRENT SOURCE
PCX-6220 150A 40V QUASI-CW LASER DIODE DRIVER/PULSED CURRENT SOURCE
PCXO116 Logic IC
PD-110A CAP,CERM,TRIM,5mm,9-50pf, 200VDC COLOR GREEN,2 LEADS
PD-110B CAP,CERM,TRIM,8mm,8.5-100pF, 250V,COLOR PURPLE
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PCT789T-C 制造商:PCTEL 功能描述:PCI MODEM CHIP
PCT789T-C1 制造商:Rochester Electronics LLC 功能描述:- Bulk
PCT900 制造商:General Tools 功能描述:Combination Contact/Non-Contact Laser Tachometer 制造商:General Tools 功能描述:TACHOMETERMINI PHOTO
PCT-A 制造商:Cooper Interconnect 功能描述: 制造商:Cooper Bussmann 功能描述: 制造商:COOPER BUSSMANN 功能描述:Fuse Holder 125V Pin Through Hole
PCTABLE 制造商:Black Box Corporation 功能描述:PC / UTILITY TABLE 28"H X 36"W X 24"D
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購

我的聯(lián)系方式

*
*
*