MT8930C-1 Datasheet, PDF (1/42 Pages) Mitel Networks Corporation – CMOS ST-BUS™ FAMILY Subscriber Network Interface Circuit

CMOS ST-BUS™ FAMILY MT8930C
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
• Controllerless or 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)
ISSUE3
November 1997
Ordering Information
MT8930CE 28 Pin Plastic DIP
MT8930CP 44 Pin PLCC
-40°C to +85°C
Description
The MT8930C 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. A controllerless mode allows the SNIC to
operate without a microprocessor.
The MT8930C is fabricated in Mitel’s CMOS process.
DSTi
DSTo
F0od
C4b
F0b
STAR/Rsto
CK/NT
Cmode
ST-BUS
Interface
Timing
and
Control
D-channel Priority
Mechanism
PLL
HDLC
Transceiver
Microprocessor Interface
S-Bus
Link
Interface
Link
Activation
Controller
LTx
VBias
LRx
V_DD
V_SS
Rsti HALF
AD0-7
R/W/WR,
AFT/PRI
DS/RD,
DinB
AS/ALE,
P/SC
Figure 1 - Functional Block Diagram
CS,
DReq
IRQ/NDA,
DCack
9-33