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PDF SY84403BL Data sheet ( Hoja de datos )
| Número de pieza | SY84403BL | |
| Descripción | Ultra Small 3.3V 4.25Gbps CML Low-Power Limiting Post Amplifier | |
| Fabricantes | Micrel Semiconductor | |
| Logotipo |  |
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SY84403BL
Ultra Small 3.3V 4.25Gbps CML Low-Power
Limiting Post Amplifier with TTL LOS
General Description
The SY84403BL is the industry’s smallest limiting post
amplifier ideal for compact copper and fiber optic
module applications. The device connects to typical
transimpedance amplifiers (TIAs). The linear signal
output from TIAs can contain significant amounts of
noise and may vary in amplitude over time. The
SY84403BL quantizes these signals and outputs
typically 800mVPP voltage-limited waveforms.
The SY84403BL comes in a tiny 10-pin 2x2 MLF®
package, which is unparalleled in the industry. It offers
space savings of 55% or more over typical post amps.
It operates from a single +3.3V ±10% power supply,
over an industrial temperature range of –40°C to
+85°C. With its wide bandwidth and high gain, signals
with data rates up to 4.25Gbps and as small as
10mVPP can be amplified to drive devices with CML
inputs or AC-coupled PECL inputs.
The SY84403BL incorporates a loss-of-signal (LOS)
open-collector TTL output with internal 4.75kΩ pull-up
resistor. A programmable loss-of-signal level set pin
(LOSLVL) sets the sensitivity of the input amplitude
detection. LOS asserts high if the input amplitude falls
below the threshold set by LOSLVL and de-asserts
low otherwise. LOS can be fed back to the enable bar
(/EN) input to maintain output stability under a loss of
signal condition. /EN de-asserts the true output signal
without removing the input signal.
All support documentation can be found on Micrel’s
web site at: www.micrel.com.
Typical Performance
Features
• Available in an ultra small 10-pin (2mm x 2mm)
MLF® package
• Multi-rate up to 4.25Gbps operation
• 10mVPP input sensitivity
• Low noise 50Ω CML data outputs
– 800mVPP differential output swing
– 60ps edge rates
– 1psRMS typ. random jitter
– 10psPP typ. deterministic jitter
• Chatter-free Loss-of-Signal (LOS) output
– 3.5dB electrical hysteresis
– OC-TTL output with internal 4.75kΩ pull-up
resistor
• Programmable LOS sensitivity using single
external resistor
• Internal 50Ω data input termination
• TTL /EN input allows feedback from LOS
• Wide operating range:
– Single 3.3V ±10% power supply
– Industrial temperature range: –40°C to +85°C
• Part of Micrel’s new ultra small FOM IC family. For
Laser Diode Drivers, see SY84202L or SY84402L
Applications
• 1.062Gbps, 2.125Gbps and 4.25Gbps Fibre
Channel
• Cable driver
• SFF and SFP transceivers
• High-gain line driver and line receiver
Markets
• Copper interconnect
• Datacom and telecom
• Storage area network (SAN)
MLF and MicroLeadFrame are registered trademarks of Amkor Technology.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
May 2009
M9999-051509-A
[email protected] or (408) 955-1690
1 page  
Micrel, Inc.
SY84403BL
AC Electrical Characteristics
VCC = +3.0V to +3.6V; TA = –40°C to +85°C; RL = 50 Ω to VCC; typical values at VCC = +3.3V, TA = 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
LOSDL
LOS Assert Time
Low LOS Assert Level
Low LOS De-assert Level
RLOSLVL = 15kΩ, Note 11
RLOSLVL = 15kΩ, Note 11
2 10 µs
8 mVPP
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
25 33 mVPP
HSYM Medium LOS Hysteresis
RLOSLVL = 5kΩ, Note 12
2
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
[email protected] or (408) 955-1690
5 Page | ||
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