SY84403BL Datasheet, PDF (5/10 Pages) Micrel Semiconductor – Ultra Small 3.3V 4.25Gbps CML Low-Power Limiting Post Amplifier with TTL LOS

Micrel, Inc.
SY84403BL
AC Electrical Characteristics
V_CC = +3.0V to +3.6V; T_A = –40°C to +85°C; R_L = 50 Ω to V_CC; typical values at V_CC = +3.3V, T_A = 25°C.
Symbol Parameter
Condition
Min
Typ
Max
Units
tr, tf
Output Rise/Fall Time
(20% to 80%)
Note 7
60
120
ps
tJITTER
Deterministic
Random
Note 8
Note 9
10
psPP
1
psRMS
VID
Differential Input Voltage Swing
See Figure 1
10
1800
mVpp
VOD_AC AC Differential Output Voltage
Note 10
600
800
950
mVpp
tOFF
LOS Release Time
2
10
µs
tON
LOSAL
LOS Assert Time
Low LOS Assert Level
RLOSLVL = 15kΩ, Note 11
2
10
µs
8
mVPP
LOSDL Low LOS De-assert Level
RLOSLVL = 15kΩ, Note 11
12
mVPP
HSYL Low LOS Hysteresis
RLOSLVL = 15kΩ, Note 12
2
3.5
4.5
dB
LOSAM Medium LOS Assert Level
RLOSLVL = 5kΩ, Note 11
12
17
mVPP
LOSDM Medium LOS De-assert Level
RLOSLVL = 5kΩ, Note 11
HSYM Medium LOS Hysteresis
RLOSLVL = 5kΩ, Note 12
2
25
33
mVPP
3.5
4.5
dB
LOSAH High LOS Assert Level
RLOSLVL = 100Ω, Note 11
34
47
mVPP
LOSDH High LOS De-assert Level
RLOSLVL = 100Ω, Note 11
70
83
mVPP
HSYH High LOS Hysteresis
RLOSLVL = 100Ω, Note 12
2
3.5
4.5
dB
VSR
LOS Sensitivity Range
10
35
mVPP
AV(Diff) Differential Voltage Gain
32
38
dB
S21
Single-Ended Small-Signal Gain
26
32
dB
Notes:
7. Amplifier in limiting mode. Input is a 200MHz square wave.
8. Deterministic jitter measured using 4.25Gbps K28.5 pattern, VID = 20mVPP.
9. Random jitter measured using 4.25Gbps K28.7 pattern, VID = 20mVPP.
10. Differential output swing measured at 4.25Gbps with 20mVpp input and PRBS-23 data pattern and 50Ω load.
11. See “Typical Operating Characteristics” for a graph showing how to choose a particular RLOSLVL for a particular LOS assert and its associated
de-assert amplitude.
12. 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 on the level of received optical power and ROSA characteristics. Based on that
ratio, the optical hysteresis corresponding to the electrical hysteresis range 2dB-4.5 dB shown in the AC characteristics table will be 0.5dB-
3dB Optical Hysteresis.
May 2009
5
M9999-051509-A
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