SY88933VKG

1
SY88933V
Micrel, Inc.
M9999-011508
hbwhelp@micrel.com or (408) 955-1690
3.3V/5V 1.25Gbps PECL LOW-POWER
LIMITING POST AMPLIFIER
WITH TTL SIGNAL DETECT
SY88933V
Rev.: D Amendment: /0
Issue Date: January 2008
TYPICAL APPLICATIONS CIRCUIT
APPLICATIONS
1.25Gbps Ethernet
1.55Mbps and 622Mbps SONET/SDH
High-gain line driver and line receiver
531Mbps and 1062Mbps Fibre Channel
Gigabit interface converter
Single 3.3V or 5V power supply
DC to 1.25Gbps operation
Low noise PECL data outputs
Chatter-free OC-TTL signal setect (SD) output with
internal 6.75k pull-up resistor
TTL EN input
Programmable SD level set (SD
LVL
)
Available in a tiny 10-pin MSOP (3mm) package
FEATURES
DESCRIPTION
The SY88933V 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 significant
amounts of noise and may vary in amplitude over time.
The SY88933V quantizes these signals and outputs PECL
level waveforms.
The SY88933V 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 1.25Gbps and as small as 5mVp-p
can be amplified to drive devices with PECL inputs.
The SY88933V generates a TTL SD output. A
programmable signal-detect level set pin (SD
LVL
) sets
the sensitivity of the input amplitude detection. SD asserts
high if the input amplitude rises above the threshold set
by SD
LVL
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.
V
CC
EN
GND GND
To
CDR
SY88933V
100k
0.1µF
From
Transimpedance
Amp.
D
OUT
/D
OUT
V
REF
V
CC
SD
LVL
D
IN
/D
IN
0
.1
µF
0
.1
µF
0
.1
µF
0
.1
µF
SD
50 50 R
pd
R
pd
For 3.3V, R
pd
= 120
For 5V, R
pd
= 220
2
SY88933V
Micrel, Inc.
M9999-011508
hbwhelp@micrel.com or (408) 955-1690
PACKAGE/ORDERING INFORMATION
PIN DESCRIPTION
Pin Number Pin Name Type Pin Function
1ENTTL Input: Enable: Asserts 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: capacitor here to V
CC
helps stabilize SD
LVL
.
5 SDLVL Input Signal-Detect Level Set: a resistor from this pin to V
CC
sets the
threshold for the data input amplitude at which SD will be asserted.
6GND Ground Device ground.
7SDOpen-collector Signal-Detect: asserts high when the data input amplitude rises above
TTL output w/ the threshold set by SD
LVL
.
internal 6.75k
pull-up resistor
8 /DOUT PECL Output Complementary data output.
9 DOUT PECL Output True data output.
10 VCC Power Supply Positive power supply.
SDLVL GND65
1EN
DIN
/DIN
VREF
10 VCC
DOUT
/DOUT
SD
9
8
7
2
3
4
10-Pin MSOP (K10-1)
Ordering Information
Package Operating Package Lead
Part Number Type Range Marking Finish
SY88933VKC K10-1 Commercial 933V Sn-Pb
SY88933VKCTR
(1)
K10-1 Commercial 933V Sn-Pb
SY88933VKI K10-1 Industrial 933V Sn-Pb
SY88933VKITR
(1)
K10-1 Industrial 933V Sn-Pb
SY88933VKG
(2)
K10-1 Industrial 933V with Pb-Free
Pb-Free bar-line indicator NiPdAu
SY88933VKGTR
(1, 2)
K10-1 Industrial 933V with Pb-Free
Pb-Free bar-line indicator NiPdAu
Note:
1. Tape and Reel.
2. Pb-Free package is recommended for new designs.
3
SY88933V
Micrel, Inc.
M9999-011508
hbwhelp@micrel.com or (408) 955-1690
Absolute Maximum Ratings
(Note 1)
Supply Voltage (V
CC
) ....................................... 0V to +7.0V
Input Voltage (D
IN
,
/D
IN
) .........................................0 to V
CC
Output Current (I
OUT
)
Continuous .............................................................50mA
Surge....................................................................100mA
EN Voltage .............................................................0 to V
CC
V
REF
Current ......................................... –800µA to +500µA
SD
LVL
Voltage ................................................. V
REF
to V
CC
Storage Temperature (T
S
) ....................... –55°C to +125°C
Operating Ratings
(Note 2)
Supply Voltage (V
CC
) .............................. +3.0V to +3.6V or
............................................................ +4.5V to +5.5V
Ambient Temperature (T
A
), Note 3 ............ –40°C to +85°C
Junction Temperature (T
J
), Note 3 .......... –40°C to +120°C
Package Thermal Resistance
MSOP
(θ
JA
) Still-Air ..................................................113°C/W
V
CC
= 3.0V to 3.6V or 4.5V to 5.5V; R
LOAD
= 50 to V
CC
–2V; T
A
= –40°C to +85°C; typical values at V
CC
= 3.3V, T
A
= 25°C.
Symbol Parameter Condition Min Typ Max Units
I
CC
Power Supply Current No output load 22 42 mA
SD
LVL
SD
LVL
Voltage V
REF
V
CC
V
V
IH
EN Input HIGH Voltage 2.0 V
V
IL
EN Input LOW Voltage 0.8 V
I
IH
EN Input HIGH Current V
IN
= 2.7V 20 µA
V
IN
= V
CC
100 µA
I
IL
EN Input LOW Current V
IN
= 0.5V –0.3 mA
V
OH
SD Output HIGH Level V
CC
3.3V 2.4 V
V
CC
< 3.3V 2.0 V
V
OL
SD Output LOW Level I
OL
= +2mA 0.5 V
V
OH
PECL Output HIGH Voltage 50 to V
CC
–2V output load V
CC
–1.085 V
CC
–0.955 V
CC
–0.880 V
V
OL
PECL Output LOW Voltage 50 to V
CC
–2V output load V
CC
–1.830 V
CC
–1.705 V
CC
–1.555 V
V
OFFSET
Differential Output Offset ±160 mV
V
IHCMR
Common Mode Range Note 1 GND +2.0 V
CC
V
V
REF
Reference Voltage Note 2 V
CC
–1.38 V
CC
–1.32 V
CC
–1.26 V
Note 1. The V
IHCMR
range is referenced to the most positive side of the differential input signal.
Note 2. The current provided into or from V
REF
must be limited to 800µA source and 500µA sink.
DC ELECTRICAL CHARACTERISTICS
Note 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 affect device reliability.
Note 2. The data sheet limits are not guaranteed if the device is operated beyond the operating ratings.
Note 3. Commercial devices are guaranteed from 0°C to +85°C ambient temperature.

SY88933VKG

Mfr. #:
Manufacturer:
Microchip Technology / Micrel
Description:
Limiting Amplifiers 3.3V-5.0V 1.25Gbps PECL Post Amp
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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