- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄369899 > MC145425 (MOTOROLA INC) Universal Digital-Loop Transceiver2(通用數(shù)字回路收發(fā)器) PDF資料下載
參數(shù)資料
| 型號： | MC145425 |
| 廠商： | MOTOROLA INC |
| 元件分類： | 數(shù)字傳輸電路 |
| 英文描述： | Universal Digital-Loop Transceiver2(通用數(shù)字回路收發(fā)器) |
| 中文描述： | DATACOM, DIGITAL SLIC, PDIP24 |
| 封裝： | PLASTIC, DIP-24 |
| 文件頁數(shù)： | 9/16頁 |
| 文件大?。?/td> | 268K |
| 代理商： | MC145425 |
MC145421
MC145425
MOTOROLA
9
In the master, time–out begins on the rising edge of the
third MSI following the last received burst. This is equivalent
to two MSI frames. The VD output is forced low during time–
out. The B channel output data will be unknown, but the
D channel bits will remain at their last values. Successful de-
modulation of a burst from the slave will result in leaving the
time–out state on the next rising MSI edge.
When the PD pin is used as an output on the slave UDLT,
time–out controls the pin. Time–out forces the PD output low
to indicate that the device has powered itself down. In this
case, the slave will not transmit to the master. However,
when a valid burst is received, time–out ends and the PD pin
is driven high to indicate power up. This feature allows the
slave UDLT to self–power–up and down in demand–powered
loop systems.
NOTE
The slave uses a free running clock during time–
out. After a long period without a burst from the
master, the timing between master and slave
could be such that more than one burst will be
needed to resync the two devices.
125
μ
s
1ST BIT
2ND BIT
1ST BIT
2ND BIT
B CHANNEL 1 OUTPUT
B CHANNEL 2 OUTPUT
B CHANNEL 2 INPUT
B CHANNEL 1 INPUT
HIGH–Z
MSI
VD
DCLK
D1I, D2I
D1O, D2O
TDC/RDC
TE1
TE2
RE1
RE2
Tx
Rx
DON’T CARE
Figure 1. Typical MC145421 Master ISDN UDLT Timing
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MC145428L | Data Set Interface Asynchronous-To-Synchronous Synchronous-To-Asynchronous Converter |
| MC145428P | Data Set Interface Asynchronous-To-Synchronous Synchronous-To-Asynchronous Converter |
| MC145429L | TELSET AUDIO INTERFACE |
| MC145429P | TELSET AUDIO INTERFACE |
| MC145442BDW | Single-Chip 300-Baud Modem |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC145425P | 制造商:Motorola Inc 功能描述: |
| MC145426P | 制造商:Motorola Inc 功能描述: |
| MC145428P | 制造商:Motorola Inc 功能描述: |
| MC145436ADW | 制造商:Motorola Inc 功能描述: |
| MC145436ADWR2 | 制造商:Motorola Inc 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。