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MFG:MITEL  Package Cooled:04+  D/C:10  

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Part Number: MT8977

 

MFG: MITEL

Package Cooled: 04+

D/C: 10

Description: The MT8977 is a variant of the MT8976 framer, which has been enhanced to meet ACCUNET® T1.5 wander...


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MT8977 General Description


The MT8977 is a variant of the MT8976 framer, which has been enhanced to meet ACCUNET® T1.5 wander tolerance (138 UI).

The MT8977 meets ESF and D3/D4 formats, and is compatible with SLC-96 systems

MT8977 Maximum Ratings

Parameter
Symbol
Min
Max
Units
Power Supplies with respect to VSS
VDD
-0.3
7
V
Voltage on any pin other than supplies
VSS-0.3
VDD+0.3
V
Current at any pin other than supplies
40
mA
Storage Temperature
TST
-55
125
Package Power Dissipation
P
800
mW
* Exceeding these values may cause permanent damage. Functional operation under these conditions is not implied.

MT8977 Features

• D3/D4 or ESF framing and SLC-96 compatible
• Two frame elastic buffer with jitter tolerance improved to 156 UI
• Insertion and detection of A, B, C, D bits, signalling freeze, optional debounce
• Selectable B8ZS, jammed bit (ZCS) or no zero code suppression
• Yellow alarm and blue alarm signal capabilities
• Bipolar violation count, FT error count, CRC error count
• Selectable robbed bit signalling
• Frame and superframe sync. signals, Tx and Rx
• AMI encoding and decoding
• Per channel, overall, and remote loop around
• Digital phase detector between T1 line and STBUS
• One uncommitted scan point and drive point
• Pin compatible with MT8976 and MT8979
• ST-BUS compatible

MT8977 Typical Application

• DS1/ESF digital trunk interfaces
• Computer to PBX interfaces (DMI and CPI)
• High speed computer to computer data links

MT8977 Connection Diagram

MT8977  Connection Diagram

MT8977 datasheet

MT8977
PDF/DataSheet Download

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    The MT8976AC is a kind of Mitel's second generation T1 interface solution. The device meets the Extended Super Frame format (ESF), the current D3/D4 format and is compatible with SLC-96 systems. In addition, the MT8976AC interfaces to DS1 1.544 Mbit/sec digi...

  • MT8976

    MT8976

    The MT8976 is Zarlink's second generation T1 interface solution. The MT8976 meets the Extended Super Frame format (ESF), the current D3/D4 format and is compatible with SLC-96 systems.The MT8976 interfaces to DS1 1.544 Mbit/sec digital trunk.

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