MT8931C Datasheet, PDF (1/40 Pages) Mitel Networks Corporation – CMOS ST-BUS™ FAMILY Subscriber Network Interface Circuit Preliminary Information

CMOS ST-BUS™ FAMILY MT8931C
Subscriber Network Interface Circuit
Features
• ETS 300-012, 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
• Complete loopback testing capabilities
• On chip HDLC D-channel protocoller
• 8 bit Motorola/Intel microprocessor interface
• Microprocessor-controlled operation
• Mitel ST-BUS interface
• Low power CMOS technology
• Single 5 volt power supply
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)
ISSUE 4
November 1997
Ordering Information
MT8931CE 28 Pin Plastic DIP
MT8931CP 44 Pin PLCC
-40°C to +85°C
Description
The MT8931C Subscriber Network Interface Circuit
(SNIC) implements the ETSI ETS 300-012, 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).
An HDLC D-channel protocoller is included and
controlled through a Motorola/Intel microprocessor
port.
The MT8931C is fabricated in Mitel’s CMOS process.
DSTi
DSTo
F0od
C4b
F0b
STAR/Rsto
XTAL1/NT
XTAL2/NC
ST-BUS
Interface
Timing
and
Control
D-channel Priority
Mechanism
PLL
HDLC
Transceiver
S-Bus
Link
Interface
Link
Activation
Controller
LTx
VBias
LRx
VDD
Microprocessor Interface
VSS
Rsti HALF
AD0-7
R/W/WR
DS/RD
AS/ALE
CS
IRQ/NDA
Figure 1 - Functional Block Diagram
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