ST5451

ISDN HDLC AND GCI CONTROLLER

MONOLITHIC ISDN ORIENTED HDLC AND

GCI CONTROLLER.

GCI AND

µW/DSI COMPATIBLE.

FULLY CONTROLLING GCI AND GCI-SCIT

M & C/I CHANNELS MANAGEMENT.

FULLY SUPPORTING LAPB AND LAPD PRO-

TOCOL ON B OR D CHANNEL.

EASILY INTERFACEABLE WITH ANY KIND

OF STANDARD NON MULTIPLEXED OR

MULTIPLEXED BUS MICROPROCESSOR.

DMA ACCESS WITH MULTIPLEXED BUS

µP

CAN HANDLE AND STORE AT THE SAME

TIME TWO FRAMES IN TRANSMISSION

(64bytes FIFO Tx) AND EIGHT FRAMES IN

RECEPTION (64bytes FIFO Rx)

COMPATIBLE WITH ALL THE STMicroelec-

tronics ISDN PRODUCT FAMILY.

GENERAL DESCRIPTION

ST5451 HDLC and GCI controller is a CMOS cir-

cuit fully developed by STMicroelectronics and

diffused in advanced 1.2

µm HCMOS3 technol-

ogy.

The device is intended to be used mainly in ISDN

applications, in Terminal (TE) and in Line Termi-

nations (LT).

ST5451 can handle HDLC packets either on

16Kbit/s D channel or 64 Kbit/s B channel; it can

work with a

wide range of PCM signals go-

ing

from GCI (General Circuit Interface) to DSI

(Digital

System Interface) to

any

PCM-like

stream.

ST5451 is a complete GCI controller designed to

comply with the GCI and GCI-SCIT (Special Cir-

cuit Interface for Terminal) completely handling

Monitor (M) and Command/Indicate (C/I) chan-

nels.

ST5451 can be easily controlled by many differ-

ent kind of microprocessors or microcontrollers

having either non-multiplexed or multiplexed bus

structure.

ST5451 can be used in connection with ST5420/1

S Interface Devices (SID-

µW and SID-GCI) and

ST5080 Programmable ISDN Combo (PIC) in

Terminals and with ST5410 U Interface Device

(UID) in Line Terminations.

March 2000

T

is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without

®

PIN CONNECTION (Top view)

SO28

ORDERING NUMBER: ST5451D

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