MH89760B

Features:

• Complete interface to a bidirectional T1 link
• D3/D4 or ESF framing and SLC-96 compatible
• Two frame elastic buffer with 32ms jitter buffer
• Insertion and detection of A, B, C, D bits Signalling freeze, optional debounce
• Selectable B8ZS, jammed bit (ZCS) or no zero code suppression
• Yellow and blue alarm signal capabilities
• Bipolar violation count, FT error count, CRC error count
• Frame and superframe sync. signals, Tx and Rx
• Per channel, overall, and remote loop around
• 8 kHz synchronization output
• Digital phase detector between T1 line and STBUS
• ST-BUS compatible
• Pin compatible with the MH89760
• Inductorless clock recovery
• Loss of Signal (LOS) indication
• Available in standard, narrow and surface mount formats


Application

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


Pinout




Specifications

	Parameter	Symbol	Min	Max	Units
1	Supply Voltage with respect to VSS	VDD	-0.3	7	V
2	Voltage on any pin other than supplies, OUTA or OUTB		VSS-0.3	VDD+0.3	V
3	Voltage on OUTA or OUTB			15	V
4	Current at any pin other than supplies, OUTA or OUTB			20	mA
5	Current at OUTA or OUTB			200	mW
6	Storage Temperature	TST	-20	85	°C

Description

The MH89760B is a complete T1 interface solution, meeting the Extended Super Frame (ESF), D3/D4 and SLC-96 formats. It interfaces to the DS11.544 Mbit/sec digital trunk.

The MH89760B is a pin-compatible enhancement of the MH89760, permitting the removal of the tuneable inductor and inclusion of the external NAND gate used for generating RxD.