MC145574APB Freescale Semiconductor, MC145574APB Datasheet - Page 119

• 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

MOTOROLA
16.4.1
16.4.2
16.4.3
16.4
ADDITIONAL NOTES
Sources of Line Interface Transformers
Line interface transformers for use with the MC145574 S/T may be obtained from the following
manufacturers:
Motorola cannot recommend one manufacturer over another and in no way implies that this is a com-
plete listing.
Termination Resistors
Note that the 100
ures 16–1 and 16–2) are mandatory when operating as an NT in accordance with CCITT I.430, ETSI
ETS 300012, and ANSI T1.605. When operating as a TE in point–to–point mode, these are also re-
quired. However, when configured as a TE in the passive bus arrangement, only one TE has these
termination resistors. The 100
tests.
Protection Diodes
CCITT I.430, ETSI ETS 300012, and ANSI T1.605 specify that the S/T–interface voltage cannot exceed
1.6 times the nominal voltage of 750 mV (= 1.2 V). Since the MC145574 is designed to operate with
2.5:1 turns ratio transformers, the diode structure as illustrated in Figures 16–1 and 16–2 is required
to provide protection, while not adversely affecting the S/T–interface when power is removed from
the device. This diode structure also protects the circuit against electrostatic discharges (ESD) and
latch–up.
The four pins RxP, RxN, TxP, and TxN are not internally protected against ESD and caution
must be taken during handling and mounting the devices to prevent any possible electrical
overstress.
Pulse Engineering
P.O. Box 12235
San Diego, California 92112
Tel : [phone]
Fax : [phone]
Part # PE 64998 (single)
Part # PE 65498 (dual)
FEE S.A.
Zone Industrielle
39270 Orgelet
France
Tel: [phone]
Fax: [phone]
Part # FE2150
termination resistors in the transmit and receive line circuitry (as shown in Fig-
termination resistor should also be removed for some conformance
MC145574
CAUTION
Secre Composants
117, rue de Cambrai
75019 Paris, France
Tel : [phone]
Fax : [phone]
Part # E01170, E01167
Part # E01171 (SMD)
APC
47 Riverside, Medway City Estate
Strood, Rochester, Kent ME2 4DP
United Kingdom
Tel: [phone]
Fax: [phone]
Part # APC15103
16–3