PSB2186 データシートの表示（PDF） - Siemens AG

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PSB2186

ISDN Subscriber Access Controller for Terminals (ISAC®-S TE)

Siemens AG 

General Information

Introduction

The PSB 2186 ISAC®-S TE implements the four-wire S/T interface used to link voice/data

terminals to an ISDN.

The PSB 2186 combines the functions of the S-Bus Interface Circuit (SBC: PEB 2080) and the

ISDN Communications Controller (ICC: PEB 2070) on one chip.

The component switches B- and D-channels between the S/T and the ISDN Oriented Modular

(IOM®) interfaces, the latter being a standard backplane interface for the ISDN-basic access.

The device provides all electrical and logical functions of the S/T interface, such as: activation/

deactivation, mode dependent timing recovery and D-channel access and priority control.

The HDLC packets of the ISDN D-channel are handled by the ISAC-S which interfaces them

to the associated microcontroller. In one of its operating modes the device offers high level

support of layer-2 functions of the LAPD protocol.

The ISAC-S is a CMOS device, available in a P-DIP-40, P-LCC-44, P-MQFP-64 package. It

operates from a single + 5 V supply and features a power-down state with very low power

consumption.

Semiconductor Group

7

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