Microchip SY58029U Bedienungsanleitung

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Precision Edge

®

SY58029U

Micrel, Inc.

M9999-082707

[email protected] or (408) 955-1690

DESCRIPTION

Selects 1 of 4 differential inputs

Provides two copies of the selected input

Guaranteed AC performance over temperature and

voltage:

•DC-to->5Gbps data rate throughput

•<390ps IN-to-Out t

pd

•<110ps t

r

/t

f

times

Ultra low-jitter design:

•<10ps

PP

total jitter (clock)

•<1ps

RMS

random jitter

•<10ps

PP

deterministic jitter

•<0.7ps

RMS

crosstalk-induced jitter

Unique patended input design minimizes crosstalk

Accepts an input signal as low as 100mV

Unique patented input termination and V

T

pin

accepts DC- and AC-coupled inputs (CML, LVPECL,

LVDS)

800mV 100K LVPECL output swing

Power supply 2.5V ±5% or 3.3V ±10%

–40°C to +85°C temperature range

Available in 32-pin (5mm

∞∞

∞∞

∞ 5mm) MLF

®

package

FEATURES

ULTRA PRECISION DIFFERENTIAL

LVPECL 4:1 MUX with 1:2 FANOUT

and INTERNAL TERMINATION

Precision Edge

®

SY58029U

APPLICATIONS

Redundant clock and/or distribution

All SONET/SDH clock/data distribution

Loopback

All Fibre Channel distribution

All Gigabit Ethernet clock and/or data distribution

Rev.: DAmendment: /0

Issue Date:August 2007

The SY58029U is a 2.5V/3.3V precision, high-speed, 4:1

differential multiplexer with 100k LVPECL (800mV)

compatible outputs, capable of handling clocks up to 4GHz

and data streams up to 5Gbps. In addition, a 1:2 fanout

buffer provides two copies of the selected inputs.

The differential input includes Micrel’s unique, 3-pin input

termination architecture that allows customers to interface

to any differential signal (AC- or DC-coupled) as small as

100mV without any level shifting or termination resistor

networks in the signal path. The result is a clean, stub-free,

low-jitter interface solution. The outputs are 800mV LVPECL,

(100k temperature compensated) with extremely fast rise/

fall times guaranteed to be less than 110ps.

The SY58029U operates from a 2.5V±5% supply or a

3.3V±10% supply and is guaranteed over the full industrial

temperature range of –40°C to +85°C. For applications that

require CML outputs, consider the SY58028U. For 400mV

LVPECL outputs, consider the SY58030U. The SY58029U

is part of Micrel’s high-speed, Precision Edge

®

product line.

All support documentation can be found on Micrel’s web

site at www.micrel.com.

TYPICAL PERFORMANCE

Precision Edge is a registered trademark of Micrel, Inc.

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

Precision Edge

®

FUNCTIONAL BLOCK DIAGRAM

IN0

/IN0

V

T0

50Ω

50Ω

IN1

/IN1

V

T1

50Ω

50Ω

Q

0

/Q

0

0

1

MUX

4:1

MUX

1:2

Fanout

V

REF-AC0

IN2

/IN2

V

T2

50Ω

50Ω

V

REF-AC2

V

REF-AC1

2

IN3

/IN3

V

T3

50Ω

50Ω

V

REF-AC3

3

SEL0 (CMOS/TTL)

SEL1 (CMOS/TTL)

Q

1

/Q

1









TIME(100ps/div.)

OutputSwing

(200mV/div.)

Produktspezifikationen