SY89542U datasheet(2/9 Pages) MICREL

Part #	SY89542U

Description	2.5Vm 3.2Gbps DUAL, DIFFERENTIAL 2:1 LVDS MULTIPLEXER WITH INTERNAL TERMINATION

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Manufacturer	MICREL [Micrel Semiconductor]

Direct Link	http://www.micrel.com

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2 / 9 page

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Precision Edge®

SY89542U

MicreL, Inc.

M9999-071505

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

PACKAGE/ORDERING INFORMATION

Pin Number

Pin Name

Pin Function

4, 2, 32, 30,

INA0, /INA0,

Differential Inputs: These input pairs are the differential signal inputs to the device. Inputs

27, 25, 23, 21

INA1, /INA1,

accept AC- or DC-coupled signals as small as 100mV. Each pin of a pair internally

INB0, /INB0,

terminates to a VT pin through 50Ω. Note that these inputs will default to an indeterminate

INB1, /INB1

state if left open. Unused differential input pairs can be terminated by connecting one input

to V

CC and the complementary input to GND through a 1kΩ resistor. The VT pin is to be

left open in this configuration. Please refer to the “Input Interface Applications” section for

more details.

3, 31, 26, 22

VTA0 , VTA1,

Input Termination Center-Tap: Each side of the differential input pair, terminates to a V

T

VTB0, VTB1

pin. The VTA0, VTA1, VTB0, VTB1 pins provide a center-tap to a termination network for

maximum interface flexibility. See “Input Interface Applications” section for more details.

6, 19

SELA, SELB

These single-ended TTL/CMOS compatible inputs select the inputs to the multiplexers.

Note that these inputs are internally connected to a 25k

Ω pull-up resistor and will default to

logic HIGH state if left open. Input switching threshold is VCC/2.

1, 5, 8, 17, 20,

VCC

Positive Power Supply: Bypass with 0.1

µF||0.01µF low ESR capacitors. The 0.01µF

24, 28, 29

capacitor should be as close to VCC pin as possible.

10, 11, 14, 15

QA, /QA,

Differential Outputs: This differential LVDS output pair provides a copy of the selected

QB, /QB

input. It is a logic function of the INA0, INA1, INB0, INB1 and SELA and SELB inputs.

Please refer to the “Truth Table” for details. Unused output pairs must be terminated with

100

Ω across the differential pair.

7, 9, 12, 13, 16, 18

GND,

Ground: Ground pin and exposed pad must be connected to the same ground plane.

Exposed pad

PIN DESCRIPTION

24

23

22

21

20

19

18

17

VCC

INB1

VTB 1

/INB1

VCC

SELB

GND

VCC

/INA0

VTA0

INA0

VCC

SELA

GND

VCC

1

2

3

4

5

6

7

8

910 11 12 13 14 15 16

32 31 30 29 28 27 26 25

32-Pin MLF™

Ordering Information(1)

Package

Operating

Package

Lead

Part Number

Type

Range

Marking

Finish

SY89542UMI

MLF-32

Industrial

SY89542U

Sn-Pb

SY89542UMITR(2)

MLF-32

Industrial

SY89542U

Sn-Pb

SY89542UMG(3)

MLF-32

Industrial

SY89542U with

Pb-Free

Pb-Free bar-line indicator

NiPdAu

SY89542UMGTR(2,3)

MLF-32

Industrial

SY89542U with

Pb-Free

Pb-Free bar-line indicator

NiPdAu

Notes:

1. Contact factory for die availability. Dice are guaranteed at T

A = 25°C, DC electricals only.

2. Tape and Reel.

3. Recommended for new designs.

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