Micrel, Inc.

SY88053AL

May 2010

5

M9999-052610-A

AC Electrical Characteristics

Symbol

Parameter

Condition

Min

Typ

Max

Units

Output Rise/Fall Time

(20% to 80%)

Note 6

25

35

ps

Deterministic

Random

Note 7

Note 8

10

1

Differential Input Voltage Swing

15

1800

Differential Output Voltage Swing

Note 6

600

700

800

LOS Release Time

Note 11

100

500

ns

LOS Assert Time

Note 11

100

500

ns

Low LOS Assert Level

5

14

Low LOS De-assert Level

20

25

Low LOS Hysteresis

2

3.0

6

dB

Medium LOS Assert Level

10

21

Medium LOS De-assert Level

30

40

Medium LOS Hysteresis

2

3.0

6

dB

High LOS Assert Level

35

55

High LOS De-assert Level

76

85

High LOS Hysteresis

2

3.0

6

dB

3dB Bandwidth

10

GHz

Differential Voltage Gain

38

dB

Single-Ended Small-Signal Gain

26

32

dB

Notes:

6. Amplifier in limiting mode. Input is a 200MHz square wave.

assert amplitude.

10. This specification defines electrical hysteresis as 20log (LOS De-Assert/LOS Assert). The ratio between optical hysteresis and electrical

hysteresis is found to vary between 1.5 and 2 depending upon the level of received optical power and ROSA characteristics. Based on that ratio,

the optical hysteresis corresponding to the electrical hysteresis range 1dB-4.5 dB, shown in the AC characteristics table, will be 0.5dB-3dB

Optical Hysteresis.

11. In real world applications, the LOS Release/Assert time can be strongly influenced by the RC time constant of the AC-coupling cap and the 50Ω

input termination. To keep this time low, use a decoupling cap with the lowest value that is allowed by the data rate and the number of

consecutive identical bits in the application (typical values are in the range of 0.001µF to 1.0µF).