3

SY89837U

Micrel, Inc.

M9999-022007

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

PACKAGE/ORDERING INFORMATION

Pin Number

Pin Name

Pin Function

1, 3,

IN0, /IN0,

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

6, 8

IN1, /IN1

accept AC- or DC-coupled signals as small as 200mV. Each pin of a pair internally terminates to

a VT pin through 50ý. Please refer to the “Input Interface Applications” section for more details.

2, 7

VT0, VT1

Input Termination Center-Tap: Each side of the differential input pair terminates to a VT pin. The

VT0 and VT1 pins provide a center-tap to a termination network for maximum interface flexibility.

See the “Input Interface Applications” section for more details.

31

SEL

This single-ended TTL/CMOS-compatible input selects the inputs to the multiplexer. This input

is internally connected to a 25ký pull-up resistor and will default to a logic HIGH state if left open.

9, 19, 22, 32

VCC

Positive power supply. Bypass with 0.1µF

⎬⎬0.01µF low ESR capacitors as close to the pins as

possible.

30, 28, 26, 24,

Q0 – Q7,

Differential Outputs: These LVPECL output pairs are the outputs of the device. They are a logic

18, 16, 14, 12,

/Q0 – /Q7

function of the IN0, IN1, and SEL inputs. Please refer to the truth table for details. Unused

29, 27, 25, 23,

output pairs may be left open.

17, 15, 13, 11

20,21

GND,

Ground. Ground and exposed pad to be tied together to most negative potential of chip.

Exposed Pad

10

CAP

Power-On Reset (POR) Initialization Capacitor. When using the multiplexer with RPE capability,

function as a normal multiplexer. See “Application” section for more details. The CAP pin should

never be left open.

PIN DESCRIPTION

24

23

22

21

20

19

18

17

Q3

/Q3

VCC

GND

GND

VCC

Q4

/Q4

IN0

VT0

/IN0

VREF-AC0

VREF-AC1

IN1

VT1

/IN1

1

2

3

4

5

6

7

8

910 11 12 13 14 15 16

32 31 30 29 28 27 26 25

Package

Operating

Package

Lead

Part Number

Type

Range

Marking

Finish

SY89837UMI

MLF-32

Industrial

SY89837U

Sn-Pb

MLF-32

Industrial

SY89837U

Sn-Pb

MLF-32

Industrial

SY89837U with

Pb-Free

Pb-Free bar-line indicator

NiduAu

MLF-32

Industrial

SY89837U with

Pb-Free

Pb-Free bar-line indicator

NiduAu

Notes:

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

2. Tape and Reel.

3. Pb-Free package is recommended for new designs.