- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄1924 > IDT82V2048EDR (IDT, Integrated Device Technology Inc)IC LIU T1/E1 8CH SHORT 208-TQFP PDF資料下載
參數(shù)資料
| 型號： | IDT82V2048EDR |
| 廠商： | IDT, Integrated Device Technology Inc |
| 文件頁數(shù)： | 9/76頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC LIU T1/E1 8CH SHORT 208-TQFP |
| 標(biāo)準(zhǔn)包裝： | 12 |
| 類型： | 線路接口裝置（LIU） |
| 規(guī)程： | E1 |
| 電源電壓： | 3.13 V ~ 3.47 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 208-BFQFP |
| 供應(yīng)商設(shè)備封裝： | 208-PQFP（28x28） |
| 包裝： | 托盤 |
| 其它名稱： | 82V2048EDR |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁當(dāng)前第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁
17
INDUSTRIAL
TEMPERATURE RANGES
OCTAL CHANNEL T1/E1/J1 SHORT HAUL LINE INTERFACE UNIT
Figure-7 T1 Pulse Template Test Circuit
For J1 applications, the PULS[3:0] (TCF1, 03H...) should be set to
‘0111’. Table-10 lists these values.
3.2.3.2 User-Programmable Arbitrary Waveform
When the PULS[3:0] bits are set to ‘11xx’, user-programmable arbitrary
waveform generator mode can be used in the corresponding channel. This
allows the transmitter performance to be tuned for a wide variety of line con-
dition or special application.
Each pulse shape can extend up to 4 UIs (Unit Interval), addressed by
UI[1:0] bits (TCF3, 05H...) and each UI is divided into 16 sub-phases,
addressed by the SAMP[3:0] bits (TCF3, 05H...). The pulse amplitude of
each phase is represented by a binary byte, within the range from +63 to -
63, stored in WDAT[6:0] bits (TCF4, 06H...) in signed magnitude form. The
most positive number +63 (D) represents the maximum positive amplitude
of the transmit pulse while the mostnegative number -63 (D) represents the
maximum negative amplitude of the transmit pulse. Therefore, up to 64
bytes are used. For each channel, a 64 bytes RAM is available.
There are eight standard templates which are stored in a local ROM.
User can select one of them as reference and make some changes to get
the desired waveform.
User can change the wave shape and the amplitude to get the desired
pulse shape. In order to do this, firstly, users can choose a set of waveform
value from the following eight tables, which is the most similar to the desired
and Table-9 list the sample data and scaling data of each of the eight tem-
plates.Thenmodifythecorrespondingsampledatatogetthedesiredtrans-
mit pulse shape.
Secondly, through the value of SCAL[5:0] bits increased or decreased
by 1, the pulse amplitude can be scaled up or down at the percentage ratio
against the standard pulse amplitude if needed. For different pulse shapes,
the value of SCAL[5:0] bits and the scaling percentage ratio are different.
The following eight tables list these values.
Do the followings step by step, the desired waveform can be pro-
grammed, based on the selected waveform template:
(1).Select the UI by UI[1:0] bits (TCF3, 05H...)
(2).Specify the sample address in the selected UI by SAMP [3:0] bits
(TCF3, 05H...)
(3).Write sample data to WDAT[6:0] bits (TCF4, 06H...). It contains the
data to be stored in the RAM, addressed by the selected UI and the
corresponding sample address.
(4).SettheRWbit(TCF3,05H...)to‘0’toimplementwritingdatatoRAM,
or to ‘1’ to implement read data from RAM
(5).Implement the Read from RAM/Write to RAM by setting the DONE
bit (TCF3, 05H...)
Repeat the above steps until all the sample data are written to or read
from the internal RAM.
(6).Write the scaling data to SCAL[5:0] bits (TCF2, 04H...) to scale the
amplitude of the waveform based on the selected standard pulse
amplitude
WhenmorethanoneUIisusedtocomposethepulsetemplate,theover-
lap of two consecutive pulses could make the pulse amplitude overflow
(exceed the maximum limitation) if the pulse amplitude is not set properly.
This overflow is captured by DAC_OV_IS bit (INTS1, 17H...), and, if
enabled by the DAC_OV_IM bit (INTM1, 12H...), an interrupt will be gen-
erated.
The following tables give all the sample data based on the preset pulse
templates in detail for reference. For preset pulse templates, scaling up/
down against the pulse amplitude is not supported.
1.Table-2 Transmit Waveform Value For E1 75
2.Table-3 Transmit Waveform Value For E1 120
3.Table-4 Transmit Waveform Value For T1 0~133 ft
4.Table-5 Transmit Waveform Value For T1 133~266 ft
5.Table-6 Transmit Waveform Value For T1 266~399 ft
6.Table-7 Transmit Waveform Value For T1 399~533 ft
7.Table-8 Transmit Waveform Value For T1 533~655 ft
8.Table-9 Transmit Waveform Value For J1 0~655 ft
IDT82V2048E
TTIPn
TRINGn
Cable
RLOAD VOUT
Note: RLOAD = 100
± 5%
Table-2 Transmit Waveform Value For E1 75
Sample
UI 1
UI 2
UI 3
UI 4
1
0000000
2
0000000
3
0000000
4
0001100
0000000
5
0110000
0000000
6
0110000
0000000
7
0110000
0000000
8
0110000
0000000
9
0110000
0000000
10
0110000
0000000
11
0110000
0000000
12
0110000
0000000
13
0000000
14
0000000
15
0000000
16
0000000
SCAL[5:0] = 100001 (default), One step change of this value of SCAL[5:0]
results in 3% scaling up/down against the pulse amplitude.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| IDT82V2048LBBG | IC LIU T1/E1 8CH SHORT 160-BGA |
| IDT82V2048SDAG | IC LIU T1/E1 8CH SHORT 144-TQFP |
| IDT82V2051EPPG | IC LIU E1 SGL SHORT HAUL 44-TQFP |
| IDT82V2052EPFG | IC LIU E1 2CH SHORT HAUL 80-TQFP |
| IDT82V2081PPG8 | IC LIU T1/J1/E1 1CH 44-TQFP |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| IDT82V2048L | 制造商:IDT 制造商全稱:Integrated Device Technology 功能描述:OCTAL T1/E1 SHORT HAUL ANALOG FRONT END |
| IDT82V2048LBB | 功能描述:IC LIU T1/E1 8CH SHORT 160-BGA RoHS:否 類別:集成電路 (IC) >> 接口 - 驅(qū)動(dòng)器，接收器，收發(fā)器 系列:- 標(biāo)準(zhǔn)包裝:250 系列:- 類型:收發(fā)器 驅(qū)動(dòng)器/接收器數(shù):2/2 規(guī)程:RS232 電源電壓:3 V ~ 5.5 V 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:帶卷 (TR) |
| IDT82V2048LBBG | 功能描述:IC LIU T1/E1 8CH SHORT 160-BGA RoHS:是 類別:集成電路 (IC) >> 接口 - 驅(qū)動(dòng)器，接收器，收發(fā)器 系列:- 標(biāo)準(zhǔn)包裝:250 系列:- 類型:收發(fā)器 驅(qū)動(dòng)器/接收器數(shù):2/2 規(guī)程:RS232 電源電壓:3 V ~ 5.5 V 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:帶卷 (TR) |
| IDT82V2048LDA | 功能描述:IC LIU T1/E1 8CH SHORT 144-TQFP RoHS:否 類別:集成電路 (IC) >> 接口 - 驅(qū)動(dòng)器，接收器，收發(fā)器 系列:- 標(biāo)準(zhǔn)包裝:250 系列:- 類型:收發(fā)器 驅(qū)動(dòng)器/接收器數(shù):2/2 規(guī)程:RS232 電源電壓:3 V ~ 5.5 V 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:帶卷 (TR) |
| IDT82V2048LDAG | 功能描述:IC LIU T1/E1 8CH SHORT 144-TQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 驅(qū)動(dòng)器，接收器，收發(fā)器 系列:- 標(biāo)準(zhǔn)包裝:250 系列:- 類型:收發(fā)器 驅(qū)動(dòng)器/接收器數(shù):2/2 規(guī)程:RS232 電源電壓:3 V ~ 5.5 V 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:帶卷 (TR) |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。