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Freescale Semiconductor Electronic Components Datasheet



MC145423

Universal Digital Loop Transceiver



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MC145423 pdf
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Universal Digital Loop
Transceiver (UDLT-3)
Pin Selectable Master/Slave
Limited Distance Modem
The MC145423 is a CMOS integrated circuit designed to be one
of the major building blocks in digital subscriber voice/data
telephone systems and remote data acquisition and control systems.
The UDLT-3 incorporates into one device, all the functionality of
the MC145421 (ISDN UDLT-2 master), MC145425 (ISDN UDLT-2
slave), MC145422 (UDLT-1 master), and MC145426 (UDLT-1
slave).
Since these modes/functions are pin selectable, the MC145423
can be used in telephone switch line cards, as well as remote digital
telsets or data terminals.
VDD = 4.5 V to 5.5 V
28-Pin SOIC and TSSOP Packages
Protocol Independent
Pin Controlled Power-Down
LI Sensitivity Control in Master Mode
2.048 MHz Output in Slave Mode
UDLT-2 Features
Synchronous Full Duplex 160 kbps Voice and Data
Communications in a 2B+2D Format for ISDN Compatibility
Provides CCITT Basic Access Data Transfer Rate (2B+D) for
ISDNs on a Single Twisted Pair Up to 1 km on 26 AWG or
Larger Cable
UDLT-1 Features
Pin Controlled Loopback
Automatic Power-Up/Down (Slave)
Full Duplex Synchronous 64 kbps Voice/Data Channel and Two
8 kbps Signaling Data Channels Over One 26 AWG Wire Pair Up
to 2 km
Order Number: MC145423/D
Rev. 0, 8/24/00
MC145423
DW SUFFIX
SOIC
CASE 751F
DT SUFFIX
TSSOP
CASE 1168
ORDERING INFORMATION
MC145423DW SOIC Package
MC145423DT TSSOP Package
This document contains information on a product under development. Motorola
reserves the right to change or discontinue this product without notice.
© Motorola, Inc., 2000. All rights reserved.



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MC145423 pdf
MC145423
PIN ASSIGNMENT
VSS
Vref
LI
LB
VD
SDI1
SDI2
FRAME 10/20
SDCLK/8kHz
SDO1
SDO2
SE/(Mu/A)
PD
MOD TRI/SQ
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28 VDD
27 MASTER/SLAVE
26 LO1
25 LO2
24 Rx
23 RE2/BCLK
22 RE1/CLKOUT
21 LI SENS/2.048 MHz
20 TDC-RDC/XTALout
19 CCI/XTALin
18 MSI/TONE
17 EN1-TE1
16 EN2-TE2/SIE/B1B2
15 Tx
28-PIN SOIC/TSSOP PACKAGES
2 TELECOMMUNICATIONS



Part Number MC145423
Description Universal Digital Loop Transceiver
Maker Freescale Semiconductor - Freescale Semiconductor
Total Page 30 Pages
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