Microchip SY89542U Bedienungsanleitung

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Precision Edge

®

SY89542U

Micrel, Inc.

M9999-082407

[email protected] or (408) 955-1690

FUNCTIONAL BLOCK DIAGRAM

DESCRIPTION

■Dual 2:1 multiplexer

■Guaranteed AC performance over temp and voltage:

•DC-to > 3.2Gbps data rate throughput

•< 600ps In-to-Out t

pd

•< 150ps t

r

/t

f

■Ultra-low jitter design:

•< 1ps

RMS

random jitter

•< 10ps

PP

deterministic jitter

•< 10ps

PP

total jitter (clock)

•< 0.7ps

RMS

crosstalk-induced jitter

■Unique input isolation design minimizes crosstalk

■Internal input termination

■Unique input termination and V

T

pin accepts

DC-Coupled and AC-coupled inputs (LVDS, LVPECL,

CML)

■350mV LVDS output swing

■CMOS/TTL compatible MUX select

■Power supply 2.5V ±5%

■–40°C to +85°C temperature range

■Available in 32-pin (5mm x 5mm) MLF

®

package

FEATURES

2.5V, 3.2Gbps DUAL, DIFFERENTIAL

2:1 LVDS MULTIPLEXER WITH

INTERNAL TERMINATION

Precision Edge

®

SY89542U

APPLICATIONS

■Redundant clock/data switchover

■SONET/SDH multi-channel select applications

■Fibre Channel applications

■GigE applications

Rev.: DAmendment: /0

Issue Date:August 2007

The SY89542U includes two precision, high-speed 2:1

differential Muxes with LVDS (350mV) compatible outputs

with a guaranteed data rate throughput of 3.2Gbps over

temperature and voltage.

The SY89542U differential inputs include a unique, 3-pin

internal termination that allows access to the termination

network through a V

T

pin. This feature allows the device to

easily interface to different logic standards, both AC- and

DC-coupled without external resistor-bias and termination

networks. The result is a clean, stub-free, low jitter interface

solution.

The SY89542U operates from a single 2.5V supply, and

is guaranteed over the full industrial temperature range

(–40°C to +85°C). For applications that require a 3.3V supply,

consider the SY89543L. The SY89542U is part of Micrel’s

Precision Edge

®

product family.

All support documentation can be found on Micrel’s web

site at www.micrel.com.

Precision Edge

®

LVDS

QA

/QA

INA0

/INA0

V

TA0

50Ω

50Ω

0

MUX A

2:1 MUX

1

INA1

/INA1

V

TA1

50Ω

50Ω

S

SELA (CMOS/TTL)

LVDS

QB

/QB

INB0

/INB0

V

TB0

50Ω

50Ω

0

MUX B

2:1 MUX

1

INB1

/INB1

V

TB1

50Ω

50Ω

S

SELB (CMOS/TTL)

Precision Edge is a registered trademark of Micrel, Inc.

Micro

LeadFrame and MLF are registered trademarks of Amkor Technology, Inc.

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