Philips Semiconductors

Product specification

SA5225

Fiber optic postamplifier

2

1998 Oct 07

853-1595 20141

DESCRIPTION

The SA5225 is a high-gain limiting amplifier that is designed to

process signals from fiber optic preamplifiers. Capable of operating

at 125Mb/s, the chip has input signal level-detection with a

user-adjustable threshold. The DATA and LEVEL-DETECT outputs

are differential for optimum noise margin and ease of use. Also

available is the SA5224 which is optimized for FDDI applications.

FEATURES

APPLICATIONS

PIN DESCRIPTION

D Package

CAZN

CAZP

GNDA

DIN

DOUT

DOUT

VREF

VSET

1

2

3

4

5

6

7

8

9

10

11

12

13

14

16

15

DIN

CF

JAM

VCCA

VCCE

GNDE

ST

ST

SD00374

Figure 1. Pin Configuration

ORDERING INFORMATION

DESCRIPTION

TEMPERATURE RANGE

ORDER CODE

DWG #

16-Pin Plastic Small Outline (SO) Package

–40 to +85

SA5225D

SOT109-1

BLOCK DIAGRAM

(6)

(2)

(1)

(16)

(13)

(12)

(8)

(9)

(10)

(11)

(7)

(3)

(16)

(15)

(5)

(4)

LIMITING

AMPLIFIER

ECL

BUFFER

JAM

BUFFER

SD

BUFFER

LEVEL

DETECTOR

REFERENCE

DIN

DIN

VREF

VSET

GNDA

CF

GNDE

DOUT

DOUT

JAM

ST

VCCE

CAZN

CAZP

VCCA

ST

SD00375

Figure 2. Block Diagram