MT91600 datasheet, PDF - EEWORLD Datasheet

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MT91600: DescriptionProgrammable SLIC; CategoryWireless rf/communication Telecom circuit; File Size305KB，18 Pages; ManufacturerZarlink Semiconductor (Microsemi); Websitehttp://www.zarlink.com/

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MT91600 Overview

Programmable SLIC

MT91600 Parametric

Parameter Name	Attribute value
Is it Rohs certified?	incompatible
Maker	Zarlink Semiconductor (Microsemi)
package instruction	5.30 MM, MO-150AH, SSOP-28
Reach Compliance Code	compli
battery fed	CONSTANT CURRENT
Battery powered	-48 V
mix	2-4 CONVERSION
JESD-30 code	R-PDSO-G28
JESD-609 code	e0
length	10.2 mm
Humidity sensitivity level	1
Negative supply voltage rating	-5 V
maximum noise	12 dBrnC
Number of functions	1
Number of terminals	28
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
PSRR-Mi	20 dB
Package body material	PLASTIC/EPOXY
encapsulated code	SSOP
Encapsulate equivalent code	SSOP28,.3
Package shape	RECTANGULAR
Package form	SMALL OUTLINE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	240
power supply	+-5 V
Certification status	Not Qualified
Maximum seat height	2 mm
Maximum slew rate	0.0195 mA
Nominal supply voltage	5 V
surface mount	YES
technology	CMOS
Telecom integrated circuit types	SLIC
Temperature level	INDUSTRIAL
Terminal surface	Tin/Lead (Sn/Pb)
Terminal form	GULL WING
Terminal pitch	0.65 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	30
width	5.3 mm

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MT91600

Programmable SLIC

Data Sheet

Features

•

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*

Free Matte Tin

Tubes

Tape & Reel

Tubes

Tape & Reel

February 2005

-40°C to +85°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’s 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:

•

PABX/ONS

Intercoms

Key Telephone Systems

Control Systems

Tip Drive

Controller

Audio Gain & Network

Balance Circuit

TIP

RING

C3A

C3B

Over-Current

Protection Circuit

Relay

Driver

Ring Drive

Controller

Loop Supervision

Line Sense

2 W to 4 W

Conversion & Line

Impedance

RLYC

RLYD

VREF

SHK

C2A

C2B

VDD GND VEE

Figure 1 - Functional Block Diagram

Zarlink Semiconductor Inc.

Zarlink, ZL and the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc.

MT91600

Loop Supervision & Dial Pulse Detection

Data Sheet

The Loop Supervision circuit monitors the state of the phone line and when the phone goes "Off Hook" the SHK pin

goes high to indicate this state. This pin reverts to a low state when the phone goes back "On Hook" or if the loop

resistance is too high for the circuit to continue to support a constant current.

The SHK output can also be monitored for dialing information when used in a dial pulse system.

Constant Current Control

The SLIC employs a feedback circuit to supply a constant feed current to the line. This is done by sensing the sum

of the voltages across the feed resistors, R1 and R2, and comparing it to the input reference voltage, Vref, that

determines the constant current feed current.

The MT91600’s programmable current range is between 18 mA to 32 mA.

Line Drivers & Overcurrent Protection

The Line Drivers control the external Battery Feed circuit which provide power to the line and allows bi-directional

audio transmission.

The loop supervision circuitry provides bias to the line drivers to feed a constant current while the over-current

protection circuitry prevents the ring driver from causing the ring transistor to overload.

The line impedance presented by the Line Driver circuitry is determined by the external network, which may be

purely resistive or complex, allowing the circuit to be configured for use in any application. The impedance can also

be fixed to one value and modified to look like a different value by reflecting an impedance through the SLIC from

an intelligent CODEC or DSP module.

There is long term protection on the RING output against accidental short circuits that may be applied either across

TIP/RING to GND or RING to GND. This high current will be sensed and limited to a value that will protect the

circuit.

In situations where an accidental short circuit occurs either across TIP/RING to GND or RING to GND, an

excessive amount of current will flow through the ring drive transistor, Q3. Although the MT91600 will sense this

high current and limit it, if the power rating of Q3 is not high enough, it may suffer permanent damage. In this case,

a power sharing resistor, R23, can be inserted (see Figure 5) to dissipate some of the power. Capacitor C13 is

inserted to provide an a.c. ground point. The criteria for selecting a value for the power sharing resistor R23 can be

found in the application section of this data sheet.

Ringing and Ring Trip Detection

Ringing is applied to the line by disconnecting pin 8, RF, from pin 9, RV, and connecting it to a ringing source which

is battery backed. This may be done by use of an electro-mechanical relay. The SLIC is capable of detecting an Off

Hook condition during ringing by filtering out the large A.C. component by use of the external components

connected to pin 23. This filter allows an Off Hook condition to be monitored at SHK, pin 24.

When using DTMF signalling only i.e., pulse dialling is not used, the capacitor, C7, can be permanently connected

to ground and does not require to be switched out during dialling.

Power up Sequence

The circuit should be powered up in the following order: AGND, VEE, VDD, V

BAT.

Zarlink Semiconductor Inc.

MT91600 Related Products

	MT91600	MT91600AN	MT91600AN1	MT91600ANR	MT91600ANR1
Description	Programmable SLIC	Programmable SLIC	Programmable SLIC	Programmable SLIC	Programmable SLIC
Maker	Zarlink Semiconductor (Microsemi)	Zarlink Semiconductor (Microsemi)	Zarlink Semiconductor (Microsemi)	Zarlink Semiconductor (Microsemi)	Zarlink Semiconductor (Microsemi)
package instruction	5.30 MM, MO-150AH, SSOP-28	SSOP, SSOP28,.3	SSOP,	SSOP,	SSOP,
Reach Compliance Code	compli	unknow	unknow	unknow	unknow
JESD-30 code	R-PDSO-G28	R-PDSO-G28	R-PDSO-G28	R-PDSO-G28	R-PDSO-G28
length	10.2 mm	10.2 mm	10.2 mm	10.2 mm	10.2 mm
Negative supply voltage rating	-5 V	-5 V	-5 V	-5 V	-5 V
Number of functions	1	1	1	1	1
Number of terminals	28	28	28	28	28
Maximum operating temperature	85 °C	85 °C	85 °C	85 °C	85 °C
Minimum operating temperature	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C
Package body material	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	SSOP	SSOP	SSOP	SSOP	SSOP
Package shape	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR
Package form	SMALL OUTLINE, SHRINK PITCH	SMALL OUTLINE, SHRINK PITCH	SMALL OUTLINE, SHRINK PITCH	SMALL OUTLINE, SHRINK PITCH	SMALL OUTLINE, SHRINK PITCH
Certification status	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified
Maximum seat height	2 mm	2 mm	2 mm	2 mm	2 mm
Nominal supply voltage	5 V	5 V	5 V	5 V	5 V
surface mount	YES	YES	YES	YES	YES
technology	CMOS	CMOS	CMOS	CMOS	CMOS
Telecom integrated circuit types	SLIC	SLIC	SLIC	SLIC	SLIC
Temperature level	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL
Terminal form	GULL WING	GULL WING	GULL WING	GULL WING	GULL WING
Terminal pitch	0.65 mm	0.65 mm	0.65 mm	0.65 mm	0.65 mm
Terminal location	DUAL	DUAL	DUAL	DUAL	DUAL
width	5.3 mm	5.3 mm	5.3 mm	5.3 mm	5.3 mm
Is it Rohs certified?	incompatible	incompatible	conform to	-	conform to
JESD-609 code	e0	e0	e3	-	e3
Terminal surface	Tin/Lead (Sn/Pb)	Tin/Lead (Sn/Pb)	MATTE TIN	-	MATTE TIN

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