®
CMOS ST-BUS™ FAMILY
MT8931B
Subscriber Network Interface Circuit
Preliminary Information
Features
•
•
•
•
•
•
•
CCITT I.430 and ANSI T1.605 S/T interface
Full-duplex 2B+D, 192 kbit/s transmission
Link activation/deactivation
D-channel access contention resolution
Point-to-point, point-to-multipoint and star
configurations
Master (NT)/Slave (TE) modes of operation
Exceeds loop length requirements
ISSUE 2
August 1993
Ordering Information
MT8931BC
28 Pin Ceramic DIP
MT8931BE
28 Pin Plastic DIP
MT8931BP
44 Pin PLCC
-40°C to +85°C
Description
The MT8931B Subscriber Network Interface Circuit
(SNIC) implements the CCITT I.430 and ANSI
T1.605 Recommendations for the ISDN S and T
reference points. Providing point-to-point and point-
to-multipoint digital transmission, the SNIC may be
used at either end of the subscriber line (NT or TE).
t
ed
ee
d n
• Complete loopback testing capabilities
sh
en ig
• On chip HDLC D-channel protocoller
m es C
data
• 8 bit Motorola/Intel microprocessor interface
om D 931
31B
• Microprocessor-controlled operation
ec ew 8
An
T89
D-channel protocoller is included and
• Mitel ST-BUS interface
HDLC
• Low power CMOS technology
t R r N MT
ll
controlled through a Motorola/Intel microprocessor
M
o fo e
fu
port.
• Single 5 volt power supply
N
Se
y for
The MT8931B is fabricated in Mitel’s CMOS process.
Applications
•
•
•
•
•
ISDN NT1
ISDN S or T interface
ISDN Terminal Adaptor (TA)
Digital sets (TE1) - 4 wire ISDN interface
Digital PABXs, Digital Line Cards (NT2)
ns
Co
lt f
u
a
or
ct
DSTi
DSTo
ST-BUS
Interface
D-channel Priority
Mechanism
LTx
S-Bus
Link
Interface
VBias
LRx
F0od
C4b
F0b
STAR/Rsto
XTAL1/NT
XTAL2/NC
Microprocessor Interface
VSS
Timing
and
Control
PLL
HDLC
Transceiver
Link
Activation
Controller
VDD
Rsti
HALF
AD0-7
R/W/WR
DS/RD
AS/ALE
CS
IRQ/NDA
Figure 1 - Functional Block Diagram
10-71
http://www.zarlink.com
World Headquarters - Canada
Tel: +1 (613) 592 0200
Fax: +1 (613) 592 1010
North America - West Coast
Tel: (858) 675-3400
Fax: (858) 675-3450
North America - East Coast
Tel: (978) 322-4800
Fax: (978) 322-4888
Asia/Pacific
Tel: +65 333 6193
Fax: +65 333 6192
Europe, Middle East,
and Africa (EMEA)
Tel: +44 (0) 1793 518528
Fax: +44 (0) 1793 518581
Information relating to products and services furnished herein by Zarlink Semiconductor Inc. trading as Zarlink Semiconductor or its subsidiaries (collectively “Zarlink”) is
believed to be reliable. However, Zarlink assumes no liability for errors that may appear in this publication, or for liability otherwise arising from the application or use of any
such information, product or service or for any infringement of patents or other intellectual property rights owned by third parties which may result from such application or
use. Neither the supply of such information or purchase of product or service conveys any license, either express or implied, under patents or other intellectual property rights
owned by Zarlink or licensed from third parties by Zarlink, whatsoever. Purchasers of products are also hereby notified that the use of product in certain ways or in
combination with Zarlink, or non-Zarlink furnished goods or services may infringe patents or other intellectual property rights owned by Zarlink.
This publication is issued to provide information only and (unless agreed by Zarlink in writing) may not be used, applied or reproduced for any purpose nor form part of any
order or contract nor to be regarded as a representation relating to the products or services concerned. The products, their specifications, services and other information
appearing in this publication are subject to change by Zarlink without notice. No warranty or guarantee express or implied is made regarding the capability, performance or
suitability of any product or service. Information concerning possible methods of use is provided as a guide only and does not constitute any guarantee that such methods of
use will be satisfactory in a specific piece of equipment. It is the user’s responsibility to fully determine the performance and suitability of any equipment using such
information and to ensure that any publication or data used is up to date and has not been superseded. Manufacturing does not necessarily include testing of all functions or
parameters. These products are not suitable for use in any medical products whose failure to perform may result in significant injury or death to the user. All products and
materials are sold and services provided subject to Zarlink Semiconductor’s conditions of sale which are available on request.
Purchase of Zarlink’s I
2
C components conveys a licence under the Philips I
2
C Patent rights to use these components in an I
2
C System, provided that the system conforms
to the I
2
C Standard Specification as defined by Philips
Zarlink and the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc.
Copyright 2001, Zarlink Semiconductor Inc. All rights reserved.
TECHNICAL DOCUMENTATION - NOT FOR RESALE
Analogue and Mixed Signal
京公网安备 11010802033920号
EEWORLD
