Microchip SY89547L Handleiding

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Precision Edge

®

SY89547L

Micrel, Inc.

M9999-091809

[email protected] or (408) 955-1690

DESCRIPTION

■Selects among four differential inputs

■Provides two copies of the selected input

■Guaranteed AC performance over temp and voltage:

• DC-to > 3.2Gbps data rate throughput

• < 620ps In-to-Out t

pd

• < 150ps t

r

/t

f

■Unique input isolation design minimizes crosstalk

■Ultra-low jitter design:

• < 1ps

RMS

random jitter

• < 10ps

PP

deterministic jitter

• < 10ps

PP

total jitter (clock)

• < 0.7ps

RMS

crosstalk-induced jitter

■Internal input termination

■Unique input termination and V

T

pin accepts DC-

coupled and AC-coupled inputs (LVDS, LVPECL,

CML)

■350mV LVDS output swing

■Power supply 3.3V ±10%

■–40°C to +85°C temperature range

■Available in 32-pin (5mm x 5mm) MLF

®

package

FEATURES

3.3V, 3.2Gbps DIFFERENTIAL 4:1 LVDS

MULTIPLEXER with 1:2 FANOUT and

INTERNAL TERMINATION

Precision Edge

®

SY89547L

APPLICATIONS

■SONET/SDH multi-channel select applications

■Fibre Channel applications

■GigE applications

Rev.: DAmendment: /0

Issue Date:

September 2009

The SY89547L is a precision, high-speed 4:1 differential

multiplexer that provides two copies of the selected input.

The high speed LVDS (350mV) compatible outputs with a

guaranteed throughput of up to 3.2Gbps over temperature

and voltage.

The SY89547L differential inputs include Micrel’s unique,

3-pin internal termination design 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 SY89547L operates from a single 3.3V supply, and

is guaranteed over the full industrial temperature range

(–40°C to +85°C). For applications that require a 2.5V supply,

consider the SY89546U. For applications that only require

one differential output, consider the SY89544U or SY89545L.

The SY89547L is part of a Micrel’s Precision Edge

®

product

family. All support documentation can be found on Micrel’s

web site at: www.micrel.com.

TYPICAL PERFORMANCE

FUNCTIONAL BLOCK DIAGRAM

Precision Edge

®

IN0

/IN0

V

T0

50Ω

50Ω

IN1

/IN1

V

T1

50Ω

50Ω

Q0

/Q0

0

1

MUX

4:1 MUX

1:2 Fanout

LVDS

IN2

/IN2

V

T2

50Ω

50Ω

2

IN3

/IN3

V

T3

50Ω

50Ω

3

S0

S1

SEL0 (CMOS/TTL)

SEL1 (CMOS/TTL)

Q1

/Q1

Precision Edge is a registered trademark of Micrel, Inc.

Micro

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

0

50

100

150

200

250

300

350

400

0100020003000400050006000

OUTPUT AMPLITUDE (mV)

FREQUENCY (MHz)

Output Amplitude

vs. Frequency

Product specificaties