sy88923av Micrel Semiconductor, sy88923av Datasheet

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sy88923av

Manufacturer Part Number
sy88923av
Description
Sy88923av 5v/3.3v 3.2 Gbps High-speed Limiting Post Amplifier
Manufacturer
Micrel Semiconductor
Datasheet

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Micrel, Inc.
M9999-110905
hbwhelp@micrel.com or (408) 955-1690
FEATURES
APPLICATIONS
BLOCK DIAGRAM
Single 3.3V or 5V power supply
Up to 3.2Gbps operation
Low noise PECL data outputs
Chatter-free open collector TTL LOS output
TTL /EN Input
Differential PECL inputs for data
Available in a tiny 10-pin (3mm) MSOP and 10-pin
(3mm) EPAD-MSOP
1.25Gbps and 2.5Gbps Gigabit Ethernet
531Mbps, 1062Mbps and 2.12Gbps Fibre Channel
622Mbps SONET
Gigabit interface converter
2.5Gbps SDH/SONET
2.5Gbps proprietary links
Parallel 10G Ethernet
LOS
GND
V
/D
V
D
REF
LVL
CC
IN
IN
Limiting
Amplifer
5V/3.3V 3.2Gbps HIGH-SPEED
LIMITING POST AMPLIFIER
1
ECL
Buffer
Level
Detect
gain and wide bandwidth is ideal for use as a post
amplifier in fiber-optic receivers with data rates up to
3.2Gbps. Signals as small as 5mV
to drive devices with PECL inputs. The SY88923AV
generates a chatter-free Loss-of-Signal (LOS) open
collector TTL output.
detect function to identify when the input signal has been
lost. The LOS output will change from logic “LOW” to logic
“HIGH” when input signal is smaller than the swing set by
LOS
of the device to maintain stability under loss-of-signal
condition. Using LOS
detection can be adjusted. The LOS
by connecting a resistor divider between V
shown in Figure 3. “Typical Operating Characteristics” on
page 6 show the relationship between input level sensitivity
and the voltage set on LOS
requires a pull-up resistor for proper operation, Figure 1.
DESCRIPTION
The SY88923AV limiting post amplifier with its high
The SY88923AV incorporates a programmable level
The LOS output is a TTL open collector output that
LVL
Figure 1. LOS Output with Desired Rise Time
. This information can be fed back to the EN input
Enable
SY88923AV
D
/D
/EN
LOS
LOS
OUT
OUT
LVL
pin, the sensitivity of the level
LVL .
V
CC
4.7k to 10k
LVL
PP
voltage can be set
Rev.: F
Issue Date: November 2005
can be amplified
SY88923AV
CC
SY88923AV
Amendment: /0
and V
REF

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sy88923av Summary of contents

Page 1

... Signals as small as 5mV to drive devices with PECL inputs. The SY88923AV generates a chatter-free Loss-of-Signal (LOS) open collector TTL output. The SY88923AV incorporates a programmable level detect function to identify when the input signal has been lost. The LOS output will change from logic “ ...

Page 2

... K10-1 SY88923AVEC K10-2 (2) SY88923AVECTR K10-2 (3) SY88923AVKG K10-1 (2, 3) SY88923AVKGTR K10-1 (3) SY88923AVEY K10-2 (2, 3) SY88923AVEYTR K10-2 Notes: 1. Contact factory for die availability. Dice are guaranteed Tape and Reel. 3. Pb-Free package is recommended for new designs. Type Pin Function /EN TTL Input Output Enable (Active Low). ...

Page 3

... Min Typ Max –0.3 20 100 GND +2 REF 0.5 100 V –1085 V –955 –1830 V –1705 V –1555 –1.38 V –1. –0.8 0.5 2.0 0.8 SY88923AV Units –880 mV mV –1. ...

Page 4

... C to +85 C; unless otherwise noted Condition Note 15mV 5mV ID PP Note 5 Note –1 pattern 23 2 –1 pattern V > 100mV < 100mV SY88923AV Min Typ Max Units 5 1800 mV PP 1400 mV PP 600 mV PP 0.2 0.5 s 0 115 150 ps ...

Page 5

... The /EN pin allows the user to disable the output signal without removing the input signal. The SY88923AV ground pin should be connected to the circuit board ground. Use multiple PCB vias close to the part to connect to ground. Avoid long, inductive runs which can degrade performance ...

Page 6

... Assert 0 0 -0.2 -0.4 -0.6 -0.8 -1.0 -1.2 LOS = V — V (V) LVL CC M9999-110905 hbwhelp@micrel.com or (408) 955-1690 LVL = 25¡ LVL = 25¡ De-Assert 6 SY88923AV LOS Assert and De-Assert Levels vs. LOS LVL 100 5. 25¡ 2.5Gbps 70 23 Pattern De-Assert Assert 0 0 -0.2 -0.4 -0.6 -0.8 -1.0 -1.2 ...

Page 7

... Micrel, Inc. 10-PIN MSOP (K10-1) M9999-110905 hbwhelp@micrel.com or (408) 955-1690 7 SY88923AV Rev. 00 ...

Page 8

... Micrel Products for use in life support appliances, devices or systems is at Purchaser’s own risk and Purchaser agrees to fully indemnify M9999-110905 hbwhelp@micrel.com or (408) 955-1690 +0.08 -0.08 +0.003 -0.003 +0.05 -0.05 +0.002 -0.002 +0.15 -0.15 +0.004 -0.004 +0.008 -0.008 +0.003 -0.003 +0.15 -0.15 +0.006 -0.006 + 1 (408) 474-1000 FAX WEB Micrel for any damages resulting from such use or sale. © 2005 Micrel, Incorporated. 8 +0.07 -0.08 +0.003 -0.003 Rev.01 http://www.micrel.com SY88923AV ...

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