MC145572APB Freescale Semiconductor, MC145572APB Datasheet - Page 16

• Manufacturer Part Number: MC145572APB
• Description: IC ISDN INTERFACE TXCVER 44-LQFP
• Manufacturer: Freescale Semiconductor
• Type: Transceiverr

Specifications of MC145572APB

• Protocol: RS232
• Voltage - Supply: 5V
• Mounting Type: Surface Mount
• Package / Case: 44-LQFP
• Number Of Line Interfaces: 1
• Control Interface: HDLC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Number Of Drivers/receivers: -
• Lead Free Status / Rohs Status: Not Compliant

The option is also provided to swap the Transmit and Receive pins with respect to the ASCII terminal data
connector. This appears in the form of a set of jumpers located near J16. With the jumpers populated as
in case 1 in Figure 2-3, the receive signal is present on pin 2 and the transmit signal on pin 3 (Rx2 Ð Rx2
and Tx3 Ð Tx3). Conversely in case 2, Rx2 Ð Rx2 and Tx3 Ð Tx3, the transmit signal is present on pin 2
and the receive on pin 3. This option is useful when the user must use a cable in which the Tx/Rx polarity
at pins 2 and 3 is not known. Pin 7 of both J16 is circuit board ground Ñ all other pins (1, 4 Ð 6, 8 Ð 25)
are no connects.
2.4
The MC145572EVK provides one connector for communication between a remote ASCII terminal and the
on-board microcontroller Serial Communications Interface (SCI). J16 resides on the NT1 side. The
connector is an industry standard DB-25 type and bring, transmit, and receive data on- or off-board via
MotorolaÕs MC145407 + 5 V EIA-232D Driver/Receiver.
TO/FROMASCII
TERMINAL
** Tx3Rx2, with jumpers populated on this vertical column.
* Rx3Tx2, with jumpers populated on this vertical column.
EIA-232 INTERFACE
DATA
GROUND
25
24
23
22
21
20
19
18
17
16
15
14
J16
13
12
11
10
9
8
7
6
5
4
3
2
1
Freescale Semiconductor, Inc.
For More Information On This Product,
Figure 2-3. EIA-232 Interface Schematic
Go to: www.freescale.com
1*
2**
Rx INPUT
Tx OUTPUT
Rx2
DO3Tx3
DI3
MC145407
TO MCU RECEIVE
DATA IN
FROM MCU
TRANSMIT DATA OUT
MC145572EVK
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