Micrel, Inc.

SY88149HL

June 2010

5

M9999-061110-I

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

AC Electrical Characteristics

Ω to V

Symbol

Parameter

Condition

Min

Typ

Max

Units

Output Rise/Fall Time

(20% to 80%)

Note 4

260

ps

JAM Low to High Propagation Time

Note 12

5

ns

JAM High to Low Propagation Time

Note 13

2

ns

SD de-assert or LOS assert with Auto

Reset enabled.

75

100

150

ns

RESET time constant

Note 5

5

ns

SD Assert Time/LOS De-assert time

Note 9

5

ns

Deterministic

Random

Note 6

Note 7

15

5

Differential Input Voltage Swing

Figure 1

4

1800

Differential Output Voltage Swing

1500

Low SD Assert/LOS De-assert Level

Ω, Note 8, 10

4.2

Low SD De-assert/LOS Assert Level

Ω, Note 10

3

Low SD/LOS Hysteresis

Ω, Note 11

2.9

dB

Medium SD Assert/LOS

De-assert Level

Ω, Note 10

5.2

12

Medium SD De-assert/LOS Assert

Level

Ω, Note 10

2.5

3.7

Medium SD/LOS Hysteresis

Ω, Note 11

3

dB

High SD Assert/LOS De-assert Level

Ω, Note 10

15

24

High SD De-assert/ LOS Assert Level

Ω, Note 10

6

9.5

High SD/LOS Hysteresis

Ω, Note 11

4

dB

3dB Bandwidth

1

GHz

Differential Voltage Gain

48

dB

Single-ended Small-Signal Gain

42

dB

Notes:

4.

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

5.

The time between applying RESET and outputs being disabled.

6.

7.

8.

SD is the opposite polarity of LOS. Therefore, an SD Assert parameter is equivalent to a LOS De-assert parameter and vice versa.

9.

its associated de-assert amplitude.

11. This specification defines electrical hysteresis as 20log (SD Assert/SD De-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 upon that ratio, the optical

hysteresis corresponding to the electrical hysteresis range 2dB-5dB, shown in the AC characteristics table, will be: 1dB-4dB optical Hysteresis.

12. JAM Low to High transition propagation delay refers to the time it takes from a LOW to HIGH transition at JAM input to turning on (if SD is selected)

or turning off (if LOS is selected) the LVPECL outputs.

13. JAM High to Low transition propagation delay refers to the time it takes from a HIGH to LOW transition at JAM input to turning off (if SD is selected)

or turning on (if LOS is selected) the LVPECL outputs.