Instrukcja obsługi Microchip SY88813V
Microchip
nieskategoryzowany
SY88813V
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M9999-072505
hbwhelp@micrel.com or (408) 955-1690
3.3V/5V 155Mbps PECL LOW POWER
LIMITING POST AMPLIFIER WITH PECL
SIGNAL DETECT
SY88813V
Rev.: B Amendment: /0
Issue Date: July 2005
TYPICAL APPLICATIONS CIRCUIT
APPLICATIONS
■155Mbps SONET/SDH
■Small form factor transceivers
■High-gain line driver and line receiver
■Single 3.3V or 5V power supply
■Up to 155Mbps operation
■Low noise PECL data outputs
■Chatter-free PECL Signal Detect (SD) output
■TTL /EN input
■Programmable SD level set (SD LVL)
■Available in a tiny 10-pin MSOP (3mm) package
FEATURES DESCRIPTION
The SY88813V low power limiting post amplifier is
designed for use in fiber-optic receivers. The device connects
to typical transimpedance amplifiers (TIAs). The linear signal
output from TIAs can contain signicant amounts of noise
and may vary in amplitude over time. The SY88813V
quantizes these signals and outputs PECL level waveforms.
The SY88813V operates from a single +3.3V or +5V
power supply, over temperatures ranging from –40 C to°
+85°C. With its wide bandwidth and high gain, signals with
data rates up to 155Mbps and as small as 5mVPP can be
amplied to drive devices with PECL inputs.
The SY88813V generates a PECL signal-detect output.
A programmable signal-detect level set pin (SDLVL) sets
the sensitivity of the input amplitude detection. SD asserts
high if the input amplitude rises above the threshold set by
SDLVL and deasserts low otherwise. /EN deasserts the true
output signal without removing the input signal. Typically
4.6dB SD hysteresis is provided to prevent chattering.
VCC
/EN
GND GND
To
CDR
SY88813V
3kΩ
From
Transimpedance
Amp.
DOUT
/DOUT
VREF
VCC
SDLVL
DIN
/DIN
0.1µF
0.1µF
0.1µF
0.1µF
SD
50Ω
Rpd
50Ω
100Ω
Rpd Rpd
For 3.3V, Rpd = 120Ω
For 5V, Rpd
= 220Ω
2
SY88813V
Micrel, Inc.
M9999-072505
hbwhelp@micrel.com or (408) 955-1690
PIN DESCRIPTION
Pin Number Pin Name Type Pin Function
1 /EN TTL Input: Enable: Deasserts true data output when high.
Default is high.
2 DIN Data Input True data input.
3 /DIN Data Input Complementary data input.
4 VREF Reference voltage.
5 SDLVL Input Signal-Detect Level Set: A voltage between V
CC and VREF on this pin
sets the threshold for the data input amplitude at which SD will be
asserted.
6 GND Ground Device ground.
7 SD PECL Output Signal-Detect: Asserts high when the data input amplitude rises above
the threshold set by SDLVL.
8 /DOUT PECL Output Complementary data output.
9 DOUT PECL Output True data output.
10 VCC Power Supply Positive power supply.
LOSLVL GND65
1/EN
DIN
/DIN
VREF
10 VCC
DOUT
/DOUT
/LOS
9
8
7
2
3
4
10-Pin MSOP (K10-1)
PACKAGE/ORDERING INFORMATION
Ordering Information
Package Operating Package Lead
Part Number Type Range Marking Finish
SY88813VKC K10-1 Commercial 813V Sn-Pb
SY88813VKCTR(1) K10-1 Commercial 813V Sn-Pb
SY88813VKG K10-1 Industrial 813V with Pb-Free
Pb-Free bar-line indicator NiPdAu
SY88813VKGTR(1) K10-1 Industrial 813V with Pb-Free
Pb-Free bar-line indicator NiPdAu
Note:
1. Tape and Reel.
3
SY88813V
Micrel, Inc.
M9999-072505
hbwhelp@micrel.com or (408) 955-1690
Absolute Maximum Ratings(1)
Supply Voltage (VCC) ....................................... 0V to +7.0V
Input Voltage (DIN, /DIN) .........................................0 to V
CC
Output Current (IOUT)
Continuous ............................................................. 50mA
Surge .................................................................... 100mA
/EN Voltage ............................................................0 to VCC
VREF Current ......................................... –800 AµA to +500µ
SDLVL Voltage ........................................................0 to VCC
Lead Temperature (soldering, 20 sec.) ................... +260°C
Storage Temperature (TS) ....................... 55 C–°C to +125°
Operating Ratings(2)
Supply Voltage (VCC) .............................. +3.0V to +3.6V or
............................................................ +4.5V to +5.5V
Ambient Temperature (TA), 40 CNote 3 ............ –°C to +85°
Junction Temperature (TJ), 40 CNote 3 .......... –°C to +120°
Package Thermal Resistance
MSOP
(θJA) Still-Air .................................................. 113°C/W
(ψJB) Still-Air.................................................... 74°C/W
VCC = 3.0V to 3.6V or 4.5V to 5.5V; RLOAD
= 50Ω to VCC–2V; TA = C to +85 C; typical values at V–40° ° CC = 3.3V, TA = 25°C
Symbol Parameter Condition Min Typ Max Units
ICC Power Supply Current no output load 21 40 mA
SDLVL SDLVL Voltage VREF VCC V
VIH /EN Input HIGH Voltage 2.0 V
VIL /EN Input LOW Voltage 0.8 V
IIH /EN Input HIGH Current VIN = 2.7V 20 µA
VIN = VCC 100 µA
IIL /EN Input LOW Current VIN = 0.5V –0.3 mA
VOH PECL Output HIGH Voltage 50Ω to VCC–2V output load V
CC–1.085 VCC–0.955 VCC–0.880 V
VOL PECL Output LOW Voltage 50Ω to VCC–2V output load V
CC–1.830 VCC–1.705 VCC–1.555 V
VOFFSET Dierential Output Oset ±100 mV
VIHCMR Common Mode Range Note 5 GND +1.7 VCC V
VREF Reference Voltage Note 6 V
CC–1.38 VCC–1.32 VCC–1.26 V
Notes:
1. Permanent device damage may occur if absolute maximum ratings are exceeded. This is a stress rating only and functional operation is
not implied at conditions other than those detailed in the operational sections of this data sheet. Exposure to absolute maximum ratlng
conditions for extended periods may aect device reliability.
2. The data sheet limits are not guaranteed if the device is operated beyond the operating ratings.
3. Commercial devices are guaranteed from 0° °C to +85 C ambient temperature.
4. Specification for packaged product only.
5. The VIHCMR range is referenced to the most positive side of the dierential input signal.
6. The current provided into or from V
REF must be limited to 800 A source and 500 A sink.µ µ
DC ELECTRICAL CHARACTERISTICS4)
Specyfikacje produktu
| Marka: | Microchip |
| Kategoria: | nieskategoryzowany |
| Model: | SY88813V |
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