1

SY58025U

Micrel, Inc.

M9999-020207

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

DESCRIPTION

s Two independent differential 2:1 multiplexers

s Guaranteed AC performance over temperature and

voltage:

• DC-to >10.7Gbps data rate throughput

s Unique, patent-pending input isolation design

minimizes crosstalk

s Ultra-low jitter design:

s Unique, patent-pending 50

VT pin accepts DC-coupled and AC-coupled inputs

(CML, LVDS, PECL)

s Typical 400mV CML output swing (R

s Internal 50

s Power supply 2.5V

s –40

s Available in 32-pin (5mm

FEATURES

ULTRA PRECISION DUAL 2:1 CML

MUX WITH INTERNAL I/O TERMINATION

SY58025U

APPLICATIONS

s Data communication systems

s All SONET OC3-OC-768 applications

s All Fibre Channel applications

s All GigE applications

Rev.: C

Amendment: /0

Issue Date:

February 2007

The SY58025U features two ultra-fast, low jitter 2:1

differential muxes with a guaranteed maximum data or clock

throughput of 10.7Gbps or 7GHz, respectively.

The SY58025U 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 CML output is optimized for 50

Ω

environments with internal 50

Ω source termination and a

400mV output swing.

The SY58025U operates from a 2.5V or 3.3V supply and

is guaranteed over the full industrial temperature range

(–40

°C to +85°C). The SY58025U is part of Micrel’s Precision

All support documentation can be found on Micrel’s web

site at www.micrel.com.

FUNCTIONAL BLOCK DIAGRAM

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

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

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