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SY88923KC Datasheet

  • SY88923KC

  • 2.5Gbps HIGH-SPEED LIMITING POST AMPLIFIER

  • 8頁

  • MICREL   MICREL

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2.5Gbps HIGH-SPEED
LIMITING POST AMPLIFIER
SY88923
FEATURES
s
Up to 2.5Gbps operation
s
Low noise
s
Chatter-Free LOS generation
s
Open Collector TTL LOS output
s
TTL /EN Input
s
Differential PECL inputs for data
s
Single power supply
s
Designed for use with SY88922 and SY88904 or
SY88905
s
Available in a tiny 10-pin (3mm) MSOP
DESCRIPTION
The SY88923 limiting post amplifier with its high gain
and wide bandwidth is ideal for use as a post amplifier in
fiber-optic receivers with data rates up to 2.5Gbps. Signals
as small as 5mVp-p can be amplified to drive devices with
PECL inputs. The SY88923 generates a chatter-free Loss
of Signal (LOS) open collector TTL output.
The SY88923 incorporates a programmable level detect
function to identify when the input signal has been lost.
This information can be fed back to the /EN input of the
device to maintain stability under loss of signal condition.
Using LOS
LVL
pin, the sensitivity of the level detection can
be adjusted. The LOS
LVL
voltage can be set by connecting
a resistor divider between V
CC
and V
REF
. Figure 3 and
Figure 4 show the relationship between input level sensitivity
and the voltage set on LOS
LVL
. Figure 5 shows the
relationship between input level sensitivity and resistor
divider ratio.
The LOS output is a TTL open collector output that
requires a pull-up resistor for proper operation, Figure 1.
+5.0V
SY88923
LOS
2k
PIN CONFIGURATION
/EN 1
D
IN
2
/D
IN
3
V
REF
4
LOS
LVL
5
MSOP
K10-1
10 V
CC
9 D
OUT
8 /D
OUT
7 LOS
6 GND
Figure 1. LOS Output with Desired Rise Time
APPLICATIONS
s
s
s
s
s
1.25Gbps Gigabit Ethernet
531Mbps and 1062Mbps Fibre Channel
622Mbps SONET
Gigabit interface converter
2.5Gbps SDH/SONET
BLOCK DIAGRAM
D
IN
Limiting
Amplifer
ECL
Buffer
D
OUT
D
OUT
D
IN
V
REF
Enable
V
CC
GND
Level
Detect
EN
LOS
LVL
LOS
Rev.: C
Amendment: /1
1
Issue Date: July 2000

SY88923KC 產品屬性

  • 100

  • 集成電路 (IC)

  • 線性 - 放大器 - 專用

  • -

  • 限幅后置放大器

  • 光纖學網絡

  • 表面貼裝

  • 10-TFSOP，10-MSOP（0.118"，3.00mm 寬）

  • 10-MSOP

  • 管件

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