Microchip SY55858U Handleiding

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SuperLite™

SY55858U

Micrel, Inc.

M9999-110705

[email protected] or (408) 955-1690

DESCRIPTION

■Guaranteed AC parameters over temperature:

•f

MAX

>3.0GHz (3Gbps)

•t

r

/ t

f

<120ps

•Within-device skew <25ps

■Non-blocking “switch architecture”

■Configurable as dual 2:1 mux, dual 1:2 fanout buffer,

1:4 fanout buffer, quad buffer, or dual 2x2 switch

■50Ω compatible outputs

■Unique input termination and V

T

pin for DC-coupled

and AC-coupled input signals–CML or PECL

■Fully differential inputs/outputs

■TTL/CMOS compatible control logic

■Wide supply voltage range:2.3V to 3.6V

■Wide operating temperature range:–40°C to +85°C

■Available in 32-pin EPAD-TQFP package

The SY55858U is a low-voltage, high-speed dual 2x2

crosspoint switch with a flexible input that accepts CML

or PECL, and a 50Ω compatible differential CML (current-

mode logic) output. The non-blocking design allows any

input to connect to any output. Varying the state of the

select inputs allows SY55858U to be used in backup,

fault tolerant, protection and backplane distribution

applications.

The signal inputs (DA

0–1

and DB

0–1

) have a unique

internal termination design that allows access to the

termination network through V

T

pins. This feature allows

the device to easily interface to other logic standards

such as AC-coupled or DC-coupled PECL/LVPECL

signals. For applications that require a single-channel

2x2 crosspoint, consider the SY55854.

FEATURES

2.5V/3.3V 3.0GHZ DUAL 2x2 CML

CROSSPOINT SWITCH

W/INTERNAL TERMINATION

SuperLite™

SY55858U

APPLICATIONS

■SONET/SDH optical transport

■Backplane redundancy

■Add-drop Multiplexers

Rev.: DAmendment: /0

Issue Date:November 2005

SuperLite is a trademark of Micrel, Inc.

SuperLite™

Product specificaties