1

SY58027U

Micrel, Inc.

M9999-082707

hbwhelp@micrel.com or (408) 955-1690

DESCRIPTION

Two independent differential 2:1 multiplexers

Guaranteed AC performance over temperature and

voltage:

• DC-to >10.7Gbps data rate throughput

Unique, patent-pending input isolation design

minimizes crosstalk

Ultra-low jitter design:

Unique, patent-pending 50ý input termination and

VT pin accepts DC-coupled and AC-coupled inputs

(CML, LVDS, PECL)

400mV LVPECL output swing

Power supply 2.5V ±5% or 3.3V ±10%

–40°C to +85°C temperature range

Available in 32-pin (5mm

∞

∞

∞

∞

FEATURES

ULTRA PRECISION DUAL 2:1

400mV LVPECL MUX WITH

INTERNAL TERMINATION

SY58027U

APPLICATIONS

Data communication systems

All SONET OC3-OC768 applications

All Fibre Channel applications

All GigE applications

Rev.: D

Amendment: /0

Issue Date:

August 2007

The SY58027U features two ultra-fast, low jitter 2:1

differential muxes with a guaranteed maximum data

throughput of 10.7Gbps.

The SY58027U differential inputs include a unique

internal termination design that allows access to the

termination network through a VT pin. The device easily

interfaces 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 differential 400mV LVPECL outputs have

extremely fast rise/fall times guaranteed to be less than

80ps.

The SY58027U operates from a 2.5V or 3.3V supply and

is guaranteed over the full industrial temperature range

(–40°C to +85°C). The SY58027U is part of Micrel’s Precision

All support documentation can be found on Micrel’s web

site at www.micrel.com.

FUNCTIONAL BLOCK DIAGRAM

QA

/QA

INA0

/INA0

50

Ω

50

Ω

INA1

/INA1

50

Ω

50

Ω

0

1

MUX A

SELA

(TTL/CMOS)

S

QB

/QB

INB0

/INB0

50

Ω

50

Ω

INB1

/INB1

50

Ω

50

Ω

0

1

MUX B

SELB

(TTL/CMOS)

S

AnyGate and Precision Edge are registered trademarks of Micrel, Inc.

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