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MH88524

Part Number	MH88524
Manufacturer	Mitel Networks
Description	Dual 2-4 Wire Circuit Preliminary Information
Published	Apr 27, 2005
Detailed Description	MH88524 ® Dual 2-4 Wire Circuit Preliminary Information Features • • • • • • Full duplex operation Two complete circui...
Datasheet	MH88524 PDF File

Overview

MH88524 ® Dual 2-4 Wire Circuit Preliminary Information Features • • • • • • Full duplex operation Two complete circuits per package Transformerless 2-4 Wire (4-2 Wire) conversion + 5V operation Wide bandwidth (50kHz) Small Package Size MH88524 ISSUE 4 April 1995 Ordering Information 10 Pin SIL Package 0° C to 70° C Description The Mitel MH88524 (Dual 2-4 wire Circuit) provides two independent interfaces between4-Wire devices such as the MH88631 COIC (Central Office Interface CIrcuit) and a speech switch such as the MT8814 (Analog Switch Array), requiring only a single bidirectional switch per crosspoint.
The MH88524 can accommodate two full duplex audio links.
The device is fabricated as a thick film hybrid which incorporates various technologies for optimum circuit design and very high reliability.
Applications 4-2 Wire and 2-4 Wire conversion for: • • • • • • • • • MH88630/631, MH88632, MH88500 & MT8840 PBX Key Telephone System Channel bank Voice Mail Terminal Equipment Digital Loop Carrier Modem Intercom RX1 Receive Gain Circuit1 2-4 Wire Circuit 1 JUN1 TX1 Transmit Gain Circuit 1 RX2 Receive Gain Circuit 2 2-4 Wire Circuit 2 JUN2 TX2 Transmit Gain Circuit 2 VDD VEE AGND Figure 1 - Functional Block Diagram 2-73 MH88524 Preliminary Information RX1 JUN1 TX1 VDD AGND VEE IC TX2 JUN2 RX2 1 2 3 4 5 6 7 8 9 10 Figure 2 - Pin Connections Pin Description Pin # 1 2 3 4 5 6 7 8 9 10 Name RX1 JUN1 TX1 VDD AGND VEE IC TX2 JUN2 RX2 Description Receive 1 (Input).
4-Wire ground (AGND) referenced audio output.
Junctor 1 (Transmit and Receive).
Ground referenced transmit and receive speech path.
Transmit 1.
4-Wire ground (AGND) referenced audio output.
Positive Supply Voltage.
Typically +5V.
Analog Ground.
2-Wire and 4-Wire ground.
Normally connected to System Ground.
Negative Supply Voltage.
Typically -5V.
Internal Connection.
This pin is internally connected.
Transmit 2 (Output).
4-Wire ground AGND) referenced audio output.
Junctor 2 (Transmit and Re...

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