MH88631-1 Mitel, MH88631-1 Datasheet
MH88631-1
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MH88631-1 Summary of contents
Page 1
... Central Office Interface (LS/GS) MH88631-1 MH88631-2 Description The Mitel MH88631-1, 2 Central Office Trunk Interface circuit provides a complete audio and signalling link between audio switching equipment and a central office. The loop seize circuitry is controlled by an external input to provide either a loop start of ground start termination. The device is fabricated using thick film ceramic technology to achieve high density circuit design ...
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... MH88631 LPGND VDD RINGND T R VTR- VTR AGND RXIN+ RXIN- VEE Pin Description Pin # Name 1 LPGND Loop Ground is the system ground reference with respect to -48V. 2 VDD Positive Power Supply (+5V). 3 RINGND Ring Ground (Input). For Ground Start Trunk only a logic low input will enable the trunk circuit to ground the Ring lead through a low resistance (390 ) ...
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... Relay Driver 2 (Output). Open collector sinks current when RC2 is high. Diode clamp protected. 40 RC2 Relay Driver 2 (Input). A logic high will activate the relay (K2) to provide proper biasing to the Tip and Ring. This input control is used for Ground Start Trunk only. Description MH88631 2-227 ...
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... MH88631 Functional Description The MH88631- Central Office Loop Start and/or Ground start analog Trunk interface circuit providing a complete audio and signalling link to the Central Office. The trunk interface circuit performs transformerless wire conversion, between the 2-wire telephone loop and the 4 wire transmit and receive pairs of a voice switching system ...
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... C1, C2, C3, C4= 0.22 F, ± 10%, 200V C5 = 0.1 F, ± 5%, 250V C6 = 1.0 F, ± 5%, 250V Q1 = 2N5657, NPN 350V, 0.5A, 20W K1 Reed Relay, E/M 12V 2 Form C Dip *Note: required for Ground Start applications, not required for Loop start applications. spikes to worst case it is MH88631 VTR ...
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... MH88631 Absolute Maximum Ratings* Parameter 1 DC Supply Voltage 2 Storage Temperature * Exceeding these values may cause permanent damage. Functional operation under these conditions is not implied. Recommended Operating Conditions Parameter 1 Operating Supply Voltage 2 Operating Current 3 Power Consumption 4 Operating Temperature + * Typical figures are with nominal ...
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... THL 18 THL 18 20 -0.15 -0.10 -0.10 -0.15 8 PSR 40 R Termination. Sym Min Typ* 4.75 0.17 -0.30 -0.40 MH88631 Max Units Test Conditions 130 V rms Hz Voltage range 40 -120Vrms Hz Voltage range 35 -120Vrms 70 mA 300 @18mA 2300 @18mA RINGND = 5.0Vdc 100 m -48VDC with 200 series on Ring lead with 1. parallel with Tip and ...
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... MH88631 DUMMY RINGER TIP LIGHTNING PROTECTION RING R1 K2A -48V BATTERY +12V 2-232 MH88631-1, -2 VTR TXIN+ R6 RXIN RXIN- R2 RXOUT 11,30 AGND GSR K2B 1 -48V RETURN XB LPGND Loop Current Setting 33 XC RGND 40 RC2 XA 39 TXIN RD2 K2 VTR RD1 RC1 ...
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... Preliminary Information 0.140 Max Side View (3.6 Max) 0.010 + 0.002 (0.25 + 0.05) 0.14 Max (3.6 Max) Notes: 1) Not to scale 2) Dimensions in inches). 3) (Dimensions in millimetres). *Dimensions to centre of pin & tolerance non accumulative. 4.00 + 0.03 (102 + 1.0) 0.60 Max (15.25 Max) * 0.05 + 0.01 (1.3 + 0.5) * 0.05 + 0.02 0.020 + 0.05 (1.3 + 0.05) (0.51 + 0.13) Figure 4 - Mechanical Data MH88631 39 40 0.18 + 0.02 (4 0.100 + 0.10 (2.54 + 0.13) 2-233 ...
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... MH88631 Notes: 2-234 Preliminary Information ...