MC145474 Просмотр технического описания (PDF) - Motorola => Freescale
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MC145474 Datasheet PDF : 111 Pages
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NOTICE
PRODUCT ENHANCEMENT AND DATA UPDATE
This notice outlines changes made to the first and second printings of the Advance Information
MC145474/75 data sheet. Changes incorporated into this revision reflect enhancements made to the
MC145474/75 ISDN S/T Transceiver as well as additional information gathered to keep up with recent
standards and to ensure Motorola’s commitment to Total Customer Satisfaction.
Product Enhancements
The following two enhancements are now incorporated into the MC145474/75. The enhanced MC145474
ISDN S/T Transceiver is fully compatible with all previous versions of the chip.
1. Far End Code Violation (FECV) detection
This enhancement provides an additional interrupt (IRQ #6) that indicates when an FECV has occurred.
The following sections of the MC145474/75 data sheet have been changed or added to support this
enhancement:
Section 1.3
Features
Section 6.20
IRQ pin
Section 7.5.3.2 NR3(1) IRQ #6
Section 7.6.3
NR4(1) IRQ #6 Enable
Section 10.9
Multiframing — FECV Detection
Section 13.7
Interrupts — IRQ #6
2. Force IDL Transmit
This enhancement is an additional SCP control bit which allows a TE configured MC145474/75 to
continue transmission onto the IDL interface regardless of the state of its transmitter. The TE’s receiver,
though, must be synchronized to INFO 4 incoming from the NT. The following sections of the
MC145474/75 data sheet have been changed or added to support this enhancement:
Section 7.2.2
NR0(2) Transmit Power Down
Section 8.15.7 BR13(1) Force IDL Transmit
General Data Sheet Updates
In addition to the data sheet changes made above due to product enhancement the following sections have
also been changed or added:
Section 6.24
Crystal specification changed to include ±100 ppm requirement.
Section 14.3
Description of receive filter delay compensation added.
Section 14.4.1
Recommended transformer vendor addresses updated.
Section 14.4.4
New section added for PCB layout recommendations.
Section 15.9
SCP timing definitions 20, 22 and 23 updated in Figure 15-2.
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding
the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit,
and specifically disclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters can and do vary in different
applications. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. Motorola does
not convey any license under its patent rights nor the rights of others. Motorola products are not designed, intended, or authorized for use as components in
systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of
the Motorola product could create a situation where personal injury or death may occur. Should Buyer purchase or use Motorola products for any such
unintended or unauthorized application, Buyer shall indemnify and hold Motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless
against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death
associated with such unintended or unauthorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the part.
Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer.
This document replaces MC145474/D ADI1523.
MOTOROLA
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© MOTOROLA INC., 1992
MC145474 • MC145475
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