Micrel, Inc.

SY88216L

July 2008

5

M9999-071108-C

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

AC Electrical Characteristics

Symbol

Parameter

Condition

Min

Typ

Max

Units

Data Rate

NRZ

0.155

2.5

Gbps

Modulation Current

(5)

AC-coupled

10

85

mA

DC-coupled, Voltage at MOD Pin

≥0.6V

10

70

(6)

mA

Modulation OFF Current

Current at MOD+ when /EN is

High or BEN is High

150

µA

Current at MOD- when /EN is

High or BEN is Low

150

µA

Output Current Rise Time

60

85

ps

Output Current Fall Time

60

85

ps

Jitter

Total Jitter

(7)

155Mbps

30

622Mbps

30

1.25Gbps

30

2.5Gbps

30

APC Loop Initialization Time

Power up with /En Low and BEN

High

12

µs

/EN Changes from High to Low

with Power ON and BEN High

10

µs

BEN Changes from Low to High

with Power ON and /EN Low

2.5

ns

Burst Enable Delay

(8, 9)

2.5

ns

Burst Disable Delay

(8, 10)

2

ns

Burst ON-Time

155Mbps

1.9

µs

622Mbps

720

ns

1.25Gbps

576

ns

2.5Gbps

576

ns

Burst OFF-Time

155Mbps

1.9

µs

622Mbps

720

ns

1.25Gbps

576

ns

2.5Gbps

576

ns

Notes:

5. Load = 15

Ω.

Ω, and damping

resistor = 10

Ω.

7. Total jitter is measured using 2

8. Measured with a laser equivalent resistive load.

9. Burst Enable Delay is measured as the time between the instant when the BEN+ signal going from low to high reaches 50% of its amplitude

and the instant at which the modulation current or the bias current (whichever takes longer) reaches 90% of its final value.

10. Burst Disable Delay is measured as the time between the instant when the BEN+ signal going from high to low reaches 50% of its amplitude

and the instant at which the modulation current or the bias current (whichever takes longer) goes below 10% of its final value.