參數(shù)資料
型號(hào)： SY88983VMITR
英文描述： Amplifier. Other
中文描述： 放大器。其他
文件頁(yè)數(shù)： 1/8頁(yè)
文件大小： 72K
代理商： SY88983VMITR
1
Final
Micrel
DESCRIPTION
I
Single 3.3V or 5V power supply
I
Up to 3.2Gbps operation
I
Low noise PECL data outputs
I
Chatter-free open collector TTL LOS output
I
TTL /EN Input
I
Differential PECL inputs for data
I
Available in a tiny 10-pin (3mm) MSOP and 10-pin
(3mm) EPAD-MSOP
The SY88923AV 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
3.2Gbps. Signals as small as 5mVp-p can be amplified
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 “LOW” to logic
“HIGH” when input signal is smaller than the swing set by
LOS
LVL
. 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
shown in Figure 3. “
Typical Operating Characteristics
”
on
page 6 show the relationship between input level sensitivity
and the voltage set on LOS
LVL.
The LOS output is a TTL open collector output that
requires a pull-up resistor for proper operation, Figure 1.
SY88923AV
LOS
4.7k
to 10k
V
CC
Figure 1. LOS Output with Desired Rise Time
FEATURES
5V/3.3V 3.2Gbps HIGH-SPEED
LIMITING POST AMPLIFIER
SY88923AV
APPLICATIONS
I
1.25Gbps and 2.5Gbps Gigabit Ethernet
I
531Mbps, 1062Mbps and 2.12Gbps Fibre Channel
I
622Mbps SONET
I
Gigabit interface converter
I
2.5Gbps SDH/SONET
I
2.5Gbps proprietary links
I
Parallel 10G Ethernet
BLOCK DIAGRAM
Limiting
Amplifer
ECL
Buffer
GND
Enable
Level
Detect
/EN
LOS
D
IN
/D
IN
V
REF
V
CC
LOS
LVL
D
OUT
/D
OUT
Rev.: C
Issue Date:
Amendment: /0
May 22, 2003
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