Micrel, Inc.

SY88353BL

February 2007

3

M9999-021707-B

Pin Description

Pin Number

Pin Name

Type

Pin Function

1

DIN

Data Input

True data input.

4

/DIN

Data Input

Complementary data input.

5

VTHN

DC Input

Tie this pin to pin 6 (VTHREF) and apply a DC voltage on pin 16

(VTHP) for signal crossing adjustment. Connect to ground if no

crossing adjustment is needed.

6

VTHREF

1.25V Reference voltage (referenced to ground) for decision

threshold adjustment.

7

LOS

Open-collector TTL

output

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

9

/DOUT

CML Output

Complementary data output.

12

DOUT

CML Output

True data output.

14

LOSLVL

Input

threshold for the data input amplitude at which LOS will be

asserted.

15

/EN

TTL Input: Default is

HIGH.

/Enable: This input enables the outputs when it is LOW. Note

that this input is internally connected to a 25kΩ pull-up resistor

and will default to a logic HIGH state if left open.

16

VTHP

DC Input

Apply a DC voltage from 0 to 2.4V to adjust the signal crossing

level when pin 5 (VTHN) is tied to pin 6 (VTHREF). 1.25V sets

the crossing close to 50%. Connect to ground if no crossing

adjustment is needed.

2, 3, 10, 11

GND

Ground

Device ground.

8, 13

VCC

Power Supply

Positive power supply.