鈥?/div>
Receive sync output pulse
Full duplex transmission over a single twisted
pair
Selectable 80 or 160 kbit/s line rate
Adaptive echo cancellation
Up to 4 km loop reach
ISDN compatible (2B+D) data format
Transparent modem capability
Frame synchronization and clock extraction
MITEL ST-BUS compatible
Low power (typically 50 mW), single 5V supply
ISSUE 1
May 1995
Ordering Information
MT9174AE
MT9174AN
MT9174AP
24 Pin Plastic DIP
24 Pin SSOP
28 Pin PLCC
-40擄C to
+
85擄C
Description
The MT9174 is identical to the MT9172 in all
respects except for the addition of one feature. The
MT9174 includes a digital output pin indicating the
temporal position of the "SYNC" bit of the biphase
transmission. This feature is especially useful for
systems such as PCS wireless base stations
applications requiring close synchronization between
microcells.
The MT9174 is fabricated in Mitel鈥檚 ISO
2
-CMOS
process.
Applications
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
T
DD
Digital PCS (DECT, CT2, PHS) base
stations requiring cell synchronization
Digital subscriber lines
High speed data transmission over twisted
wires
Digital PABX line cards and telephone sets
80 or 160 kbit/s single chip modem
DSTi/Di
CDSTi/
CDi
Transmit
Interface
Prescrambler
Scrambler
Differentially
Encoded Biphase
Transmitter
Transmit
Filter &
Line Driver
L
OUT
F0/CLD
C4/TCK
F0o/RCK
MS0
MS1
MS2
RegC
Control
Register
Transmit
Timing
V
Bias
Address
Echo Canceller
Error
Signal
Echo Estimate
鈥?/div>
DPLL
MUX
L
OUT
DIS
Master Clock
Phase Locked
Transmit/
Clock
Receive
Timing &
Control
Sync Detect
Status
Receive
Precan
鈭?/div>
+
Receive
Filter
-1
+2
L
IN
OSC2
DSTo/Do
CDSTo/
CDo
RxSB
Receive
Interface
De-
Prescrambler
Descrambler
Differentially
Encoded Biphase
Receiver
OSC1
V
DD
V
SS
V
Bias
V
Ref
Figure 1 - Functional Block Diagram
9-155
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