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Transformerless 2 W to 4 W conversion
Controls battery feed to line
Programmable line impedance
Programmable network balance impedance
Off-hook and dial pulse detection
Ring ground over-current protection
Programmable gain
Programmable constant current feed
-22 V to -72 V battery operation
Ordering Information
MT91600AN
MT91600ANR
MT91600AN1
MT91600ANR1
*Pb
28 Pin SSOP
28 Pin SSOP
28 Pin SSOP*
28 Pin SSOP*
Free Matte Tin
Tubes
Tape & Reel
Tubes
Tape & Reel
February 2005
-40擄C to +85擄C
Description
The Zarlink MT91600 provides an interface between
a switching system and a subscriber loop, mainly for
short loop SLIC applications. The functions provided
by the MT91600 include battery feed, programmable
constant current, 2 W to 4 W conversion, off-hook
and dial pulse detection, user definable line and
network balance impedance鈥檚 and the capability of
programming the audio gain externally. The device is
fabricated as a CMOS circuit in a 28 pin SSOP
package.
Applications
Line interface for:
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PABX/ONS
Intercoms
Key Telephone Systems
Control Systems
X3
X2
X1
TD
Tip Drive
Controller
Audio Gain & Network
Balance Circuit
VX
VR
TF
TIP
RING
RF
C3A
C3B
RV
RD
Over-Current
Protection Circuit
Relay
Driver
Ring Drive
Controller
Loop Supervision
Line Sense
2 W to 4 W
Conversion & Line
Impedance
Z3
Z2
Z1
RLYC
RLYD
IC
VREF
SHK
C1
C2A
C2B
VDD GND VEE
Figure 1 - Functional Block Diagram
1
Zarlink Semiconductor Inc.
Zarlink, ZL and the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc.
Copyright 1999-2005 Zarlink Semiconductor Inc. All Rights Reserved.
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