MC145426 Motorola, MC145426 Datasheet

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MC145426

Manufacturer Part Number
MC145426
Description
(MC145422 / MC145426) UNIVERSAL DIGITAL-LOOP TRANSCEIVER(UDLT)
Manufacturer
Motorola
Datasheet

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DataSheet
4
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Universal Digital-Loop
Transceivers (UDLT)
that provide 80 kbps full–duplex data communication over 26 AWG and larger
twisted–pair cable up to two kilometers in distance. Intended primarily for use in
digital subscriber voice/data telephone systems, these devices can also be
used in remote data acquisition and control systems. These devices utilize a
256 kilobaud modified differential phase shift keying burst modulation technique
for transmission to minimize RFI/ EMI and crosstalk. Simultaneous power
distribution and duplex data communication can be obtained using a single
twisted–pair wire.
evolving, telephone switching hardware and software architectures.
telephone switch linecard and the MC145426 Slave UDLT for use at the remote
digital telset and/or data terminal.
reliable low–power operation and proven capability for complex analog/digital
LSI functions.
MC145422 Master UDLT
MC145426 Slave UDLT
REV 2
9/95
MOTOROLA
U
.com
The MC145422 and MC145426 UDLTs are high–speed data transceivers
These devices are designed for compatibility with existing, as well as
The UDLT chip–set consists of the MC145422 Master UDLT for use at the
The devices employ CMOS technology in order to take advantage of their
Motorola, Inc. 1995
Provides Full–Duplex Synchronous 64 kpbs Voice/Data Channel and Two
8 kbps Signaling Data Channels Over One 26 AWG Wire Pair Up to Two
Kilometers
Compatible with Existing and Evolving Telephone Switch Architectures and
Call Signaling Schemes
Automatic Detection Threshold Adjustment for Optimum Performance Over
Varying Signal Attenuations
Protocol Independent
Single 5 V Power Supply
22–Pin PDIP, 24–Pin SOG Packages
Application Notes AN943, AN949, AN968, AN946, and AN948
Pin Controlled Power–Down and Loopback Features
Signaling and Control I/O Capable of Sharing Common Bus Wiring with
Other UDLTs
Variable Data Clock — 64 kHz to 2.56 MHz
Pin Controlled Insertion/Extraction of 8 kbps Channel into LSB of 64 kbps
Channel for Simultaneous Routing of Voice and Data Through PCM Voice
Path of Telephone Switch
Compatible with MC145500 Series PCM Codec–Filters
Pin Controlled Loopback Feature
Automatic Power–Up/Power–Down Feature
On–Chip Data Clock Recovery and Generation
Pin Controlled 500 Hz D3 or CCITT Format PCM Tone Generator for
Audible Feedback Applications
22
24
ORDERING INFORMATION
MC145422DW SOG Package
MC145426DW SOG Package
MC145422P
MC145426P
MC145422
MC145426
1
1
MC145422 MC145426
Order this document
Plastic DIP
Plastic DIP
SOG PACKAGE
PLASTIC DIP
DW SUFFIX
CASE 751E
CASE 708
P SUFFIX
by MC145422/D
1

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MC145426 Summary of contents

Page 1

... The UDLT chip–set consists of the MC145422 Master UDLT for use at the telephone switch linecard and the MC145426 Slave UDLT for use at the remote digital telset and/or data terminal. The devices employ CMOS technology in order to take advantage of their reliable low– ...

Page 2

... MC145422 — MASTER (PLASTIC PACKAGE ref SI1 6 SO1 7 SI2 8 SO2 MC145426 — SLAVE (PLASTIC PACKAGE ref SI1 6 SO1 7 SI2 8 SO2 9 Mu MC145422 MC145426 2 4 DataSheet U .com PIN ASSIGNMENTS ...

Page 3

... DataSheet U .com MC145422 MASTER UDLT BLOCK DIAGRAM + 1 MODULATION BUFFER – 1 RECEIVE REGISTER SEQUENCE AND CONTROL VD CONTROL DEMODULATION TRANSMIT REGISTER MC145426 SLAVE UDLT BLOCK DIAGRAM + 1 LOOPBACK – 1 CONTROL TONE GEN. POWER– SEQUENCE DOWN AND CONTROL CONTROL OSC VD CONTROL DEMODULATION TRANSMIT REGISTER ...

Page 4

... Modulation Baud Rate (See Note 2) NOTES: 1. The MC145426 crystal frequency divided by 512 must equal the MC145422 MSI Frequency 2. Assumes crystal frequency of 4.096 MHz for the MC145426 and 2.048 MHz CCI for the MC145422. DIGITAL CHARACTERISTICS Input High Level Input Low Level ...

Page 5

... MSI to TDC/RDC Setup Time TE1/RE1 to TDC/RDC Setup Time Rx to TDC/RDC Setup Time Rx to TDC/RDC Hold Time SI1, SI2 to MSI Setup Time SI1, SI2 to MSI Hold Time MC145426 SWITCHING CHARACTERISTICS Parameter Input Rise Time Input Fall Time Clock Output Pulse Width Crystal Frequency ...

Page 6

... CLK, TDC, RDC, RE1, CCI, MSI MSI VD, SO1, SO2 TDC Tx MC145422 MC145426 6 4 DataSheet U .com SWITCHING WAVEFORMS t w(H) t w(L) 90% 50% 10 Figure 1. 70% t PHL 70% Figure 2. 70% t PLH 70% Figure 3. 50% 70% t PLH 30% 70% t PHL 30% MOTOROLA ...

Page 7

... TE1, RE1, MSI TDC, RDC, CLK MOTOROLA 4 DataSheet U .com SWITCHING WAVEFORMS (continued) 70% t su3 70% TDC, RDC Figure 4. 70% t su5 70% Rx 30% Figure 5. t su6 TE1 (MC145426) OR MSI (MC145422) 70% SI1, SI2 30% Figure 6. 30% t su4 30% 30 70% 30% 70% 30 70% 30% MC145422 MC145426 7 ...

Page 8

... TE1 CLK RE1 CLK Tx CLK MC145422 MC145426 8 4 DataSheet U .com SWITCHING WAVEFORMS (continued) 70 70% Figure 7. 70 70% Figure 8. 70% SO1, SO2 30 70% TE1 Figure 9. 30 70% 30 70% 70% 30 70% MOTOROLA ...

Page 9

... TDC/RDC after the rising edge of TE1. Data on the Rx pin is loaded into the receive register of the UDLT on the eight falling edges of TDC/RDC after a positive transition on RE1. This clock should be ap- proximately leading–edge aligned with MSI. MC145422 MC145426 9 ...

Page 10

... Line Driver Outputs These outputs drive the twisted pair line with 256 kHz modified DPSK bursts each frame and are push–pull. These pins are driven to V ref when not modulating the line. MC145426 SLAVE UDLT PIN DESCRIPTIONS V DD Positive Supply Normally 5 V. ...

Page 11

... DataSheet U .com BACKGROUND The MC145422 master and MC145426 slave UDLT trans- ceiver ICs main application is to bidirectionally transmit the digital signals present at a codec–filter digital–PABX back- plane interface over normal telephone wire pairs. This allows the remoting of the codec–filter in a digital telephone set and enables each set to have a high speed data access to the PABX switching facility ...

Page 12

... CLK pin. On the ninth rising edge of CLK, TE1 goes low, RE1 goes high, and voice data from the codec–filter is input to the receiver register from the Rx pin on the next eight falling edges of CLK. RE1 is TE1 inverted and is provided to facilitate interface to the codec–filter. MC145422 MC145426 12 4 DataSheet U ...

Page 13

... LATCH SI1, SI2. TWO CCI CLOCKS LATER, TRANSFER RECEIVE REGISTER TO MODULATION BUFFER, START MODULATION. MOTOROLA 4 DataSheet U .com 125 s THREE–STATE VALID DATA DON’T CARE Figure 10. Master UDLT Timing OUT IN DON’T CARE IN VALID IN OUT OUT TRANSFER DEMODULATOR DATA TO DEMODULATION BUFFER MC145422 MC145426 13 ...

Page 14

... TE1 RE1 Tx Rx SI1, SI2 SO1, SO2 VD DEMODULATION DATA TRANSFER TO DEMODULATION BUFFER NOTE: 1. Slip between master and slave is taken up in this period. MC145422 MC145426 14 4 DataSheet U .com 125 s VOICE DON’T CARE DON’T CARE TRANSFER DEMODULATION BUFFER TO TRANSMIT REGISTER, GENERATE ENABLES, LATCH SI1, SI2, OUTPUT Tx, SO1, SO2, OUTPUT VALID DATA, START 128 kHz CLOCK, START MODULATION AFTER FOUR 256 kHz BAUD PERIODS ...

Page 15

... AWG twisted–pair wire as viewed the master UDLT and the slave UDLT. DIFFERENTIAL–PHASE–SHIFT KEYING MODIFIED DIFFERENTIAL–PHASE–SHIFT KEYING Figure 12. Modified Differential Phase Shift Keying Figure 13. Typical Signal Waveforms at Demodulator 13b. Bit Pattern — Random MC145422 MC145426 15 ...

Page 16

... MC145422 MC145426 16 4 DataSheet U .com MASTER BIT PATTERN — 1010101000 BIT PATTERN — RANDOM Figure 14. Typical Signal Waveforms at Demodulator SLAVE MOTOROLA ...

Page 17

... MOTOROLA 4 DataSheet U .com Figure 15. Typical Multichannel Digital Line Card MC145422 MC145426 17 ...

Page 18

... MC145422 MC145426 18 4 DataSheet U .com Figure 16. Basic Digital Telset MOTOROLA ...

Page 19

... MOTOROLA 4 DataSheet U .com MC145426 MC145502 Figure 17. Full–Featured Digital Telset MC145422 MC145426 19 ...

Page 20

... Motorola, Inc. Motorola, Inc Equal Opportunity/Affirmative Action Employer. How to reach us: USA/EUROPE: Motorola Literature Distribution; P.O. Box 20912; Phoenix, Arizona 85036. 1–800–441–2447 MFAX: RMFAX0@email.sps.mot.com – TOUCHTONE (602) 244–6609 INTERNET: http://Design–NET.com MC145422 MC145426 20 4 DataSheet U .com ...

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