Micrel, Inc.

SY88403BL

November 2008

4

M9999-111808-F

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

Pin Description

QFN

Pin Number

EPAD-MSOP

Pin Number

Pin

Name

Type

Pin Function

1, 4

2, 3

DIN, /DIN

Differential

data input

Differential data input. Each pin internally terminates to REF

through 50

Ω.

2, 3, 10, 11

Exposed Pad

6

Exposed Pad

GND

Ground

Device ground. Exposed pad must be soldered (or equivalent)

to the same potential as the ground pins.

5, 8, 13, 16

10

VCC

Power

supply

Positive power supply. Bypass with 0.1µF||0.01µF low ESR

capacitors. 0.01µF capacitors should be as close as possible to

VCC pin.

6

4

VREF

Reference Voltage. Bypass with 0.01µF low ESR capacitor from

7

7

LOS

Open

Collector TTL

output with

internal

4.75k

Ω pull-

up resistor

Loss-of-Signal: Asserts high when the data input amplitude falls

below the threshold set by LOSLVL.

9, 12

9, 8

DOUT,

/DOUT

Differential

CML output

Differential data output.

14

5

LOSLVL

Input: Default

is maximum

sensitivity.

Loss-of-Signal level set: A resistor from this pin to VCC sets the

threshold for the data input amplitude at which the LOS output

will be asserted.

15

1

/EN

TTL input:

Default is

high.

Enable bar: De-asserts true data output when high. Incorporates

25k