MC145574APB Freescale Semiconductor, MC145574APB Datasheet - Page 67
MC145574APB
Manufacturer Part Number
MC145574APB
Description
IC TRANSCEIVER ISDN 32-LQFP
Manufacturer
Freescale Semiconductor
Type
Transceiverr
Specifications of MC145574APB
Voltage - Supply
4.75 V ~ 5.25 V
Mounting Type
Surface Mount
Package / Case
32-LQFP
Number Of Line Interfaces
1
Control Interface
HDLC
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Number Of Drivers/receivers
-
Protocol
-
Lead Free Status / Rohs Status
Not Compliant
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MOTOROLA
7.3.1
7.3.2
7.3.3
7.3
of power, the MC145574 should be reset. This pin is a Schmitt–trigger input and could have an external
RC circuit connected to perform the power–on reset function.
ADDITIONAL NOTES
Input Levels
The MC145574 S/T transceiver is always TTL/CMOS level compatible on all digital input pins.
Output Levels
The MC145574 is always CMOS level compatible on all digital output pins.
SCP HIDOM
The MC145574 S/T transceiver has the capability of forcing all outputs (both analog and digital) to
the high–impedance state. This feature, known as the “serial control port high–impedance digital output
mode” is provided to allow “in–circuit” testing of other circuits or devices resident on the same PCB
without requiring the removal of the MC145574.
The SCP HIDOM mode is entered by holding SCPEN low for a minimum of 33 consecutive rising
edges of the SCPCLK while SCP Rx is high. If SCPEN goes high or if SCP Rx goes low, the device
exits the SCP HIDOM mode and returns to normal operation.
MC145574
7–5