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| 型號： | MC145572AFN |
| 廠商： | Freescale Semiconductor |
| 文件頁數(shù)： | 26/52頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC TRANSCEIVER ISDN 44-PLCC |
| 標準包裝： | 26 |
| 類型： | 收發(fā)器 |
| 規(guī)程： | RS232 |
| 電源電壓： | 5V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 44-LCC（J 形引線） |
| 供應(yīng)商設(shè)備封裝： | 44-PLCC（17.525x17.525） |
| 包裝： | 管件 |
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33
MC145572EVK
2.7.4
LT Side Configuration DIP Switch S7
This DIP switch is used to congure operation of the LT side of the MC145572EVK. In particular, the
MC145572 U-Interface Transceiver is congurable for IDL or GCI operation, master or slave timing mode,
Parallel or Serial Control Port operation.
2.8
POWER SUPPLY
The MC145572EVK is a + 5 V only board that pulls approximately 250 mA while activated and operating
in the combined NT1/LT mode. It is recommended that a 5 V supply with a 1 A minimum current capability
be used.
Power supply connections are made to the terminals marked + 5 V and GND on J19. The terminal marked
ALT is reserved for future use.
One 1N5339A D28 5 watt zener regulator diode (5.6 V) protects the MC145572EVK from over voltage
and reverse polarity conditions.
Figure 2-9. Power Connector Pin Assignments
Table 2-9. LT Side Conguration DIP Switch S2
DIP Switch
Function
Description
Factory
Setting
Open
Closed
S2-1
RFon
RFoff
Selects between on-board and off-board 8 kHz clock reference applied to the
FREQREF pin of the LT side MC145572. When open, this switch selects the on-board
5 ppm reference. When closed, the signal at JP26-3 is applied to FREQREF. See
S7-8 description.
RFon
S2-2
MAS
SLV
Selects the level on the M/S pin to the NT1 U-Interface Transceiver. MC145572 is the
timing master.
MAS
S2-3
FSR
FSX=FSR
Connects the FSR and FSX pins of the NT side MC145572 when closed. Use only in
slave mode.
FSR
S2-4
8
10
Selects 10- or 8-bit mode gated IDL clock outputs for use with a bit error analyzer on
the NT1 side when the MC145572 is congured for MCU mode operation.
10
S2-5
IDL2
GCI
Selects between MCU or GCI operation for the LT side U-transceiver. When open, the
MC145572 is congured for MCU operation and the time division multiplexed bus
interface to the MC145572 is in the IDL2 mode. When closed, the MC145572 is
congured for GCI operation and all 2B+D and control/status information is
transferred over the GCI interface.
IDL2
S2-6
RF=FSR
When closed, this switch connects the FSR signal of the LT side MC145572 to the
EXTFREF, the external frequency reference input. S2-1 must also be in the closed
position.
RF=FSR
S2-7
Not Used.
+ 5 V
GND
ALT
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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| MC145572APB | 功能描述:IC ISDN INTERFACE TXCVER 44-LQFP RoHS:否 類別:集成電路 (IC) >> 接口 - 驅(qū)動器，接收器，收發(fā)器 系列:- 標準包裝:1,000 系列:- 類型:收發(fā)器 驅(qū)動器/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-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:16-SOIC 包裝:帶卷 (TR) |
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| MC145572FNR2 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MC145572PB | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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