SY733021U
2.5/3.3V 1-to-1 Differential to
LVCMOS/LVTTL Tra nslator
Precision E dge®
General Description
Micrel’s SY733021U is a 1-to-1, differential-to-LVCMOS /
LVTTL translator. The differential input is highly flexible
and can accept LVPECL, LVDS, LVHSTL, SSTL, and
HCSL input types.
SY733021U is part of Micrel’s Precision Edge® product
line, is pin-to-pin compatible with IDT’s ICS83021I and is
available as a Pb-free 8-pin SOIC in either tube or tape
and reel packaging. The SY733021U runs on a 2.5V
(±5%) or a 3.3V (±10%) power supply and is guaranteed
over the full industrial temperature range (–40°C to
+85°C).
Datasheets and support documentation are available on
Micrel’s web site at: www.micrel.com.
Features
• Differential LVPECL, LVDS, LVHSTL, SSTL, and HCSL
inputs
• 350MHz maximum frequency
• Additive phase jitter:
− 90fsRMS, 100MHz (637kHz to 10MHz)
• <500ps part-to-part skew
• 1.9ns typical propagation delay (VCC = 2.5V)
• 2.5V ±5% or 3.3V ±10% power supply operation
• −40°C to +85°C industrial operating temperature
• Available in 8-pin SOIC lead-free package
Applications
• Clock distribution
• PCIExpress®
• Servers
• Switches
• Routers
Functional Block Diagram
Precision Edge is a registered trademark of Micrel, Inc.
PCI-Express is a registered trademark of PCI-SIG.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • US A • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
March 21, 2014 Revision 1.0
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Micrel, Inc.
SY733021U
Ordering Information(1)
Part Number Package Type Operating Range Package Marking Lead Finish
SY733021UZG 8L SOIC Industrial SY733021U with Pb-Free Bar-Line Indicator NiPdAu
SY733021UZGTR
(2)
8L SOIC Industrial SY733021U with Pb-Free Bar-Line Indicator NiPdAu
Note:
1. Contact f act ory for die avail abi lit y. Dice are guaranteed at TA = 25°C, DC Electricals only.
2. Tape and reel.
Pin Configuration
8-Pin SOIC (Z8-1)
Pin Description
Pin Number Pin Name Functional Description
7 Q TTL Output
2, 3 D, /D Differential Inputs
8 VCC +3.3V or +2.5V Power Supply
5 GND Ground
1, 4, 6 NC No Connect
Truth Table
D /D Q
L H L
H L H
Open Open L
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Micrel, Inc.
SY733021U
Absolute Maximum Ratings(3)
Input Voltage (VIN) ................................ –0.5V to VCC + 0.5V
Suppl y Voltage (VCC) ..................................................... 4.6V
Lead Temperature (soldering, 20s) ............................ 260°C
Storage Temperature (TS) ......................... –65°C to +150°C
Operating Ratings(4)
Suppl y Voltage (VCC) ............... +2.5V ± 5% or +3.3V ± 10%
Ambient Temperature (TA) .......................... –40°C to +85°C
Junction Thermal Resistance
SOIC (θJA) ........................................................ 113°C/W
DC Electrical Characteristics(5)
VCC = +2.5V ±5% or +3.3V ±10%; TA = -40°C to +85°C
Symbol Parameter Condition Min. Typ. Max. Units
VCC Power Supply Voltage 2.375 2.5 2.625 V
2.97 3.3 3.63
ICC Power Supply Current 20 mA
TTL DC Electrical Characteristics(5, 6)
TA = -40°C to +85°C
Symbol
Parameter
Condition
Min.
Typ.
Max.
Units
VOH Output High Voltage VCC = 2.625V 1.8 V
VCC = 3.63V 2.6
VOL Output Low Voltage VCC = 2.625V or 3.63V 0.5 V
Differential Input DC Electrical Characteristics(5)
VCC = +2.5V ±5% or +3.3V ±10%; TA = -40°C to +85°C
Symbol Parameter Condition Min. Typ. Max. Units
IIH Input High Current D, VIN = VCC = 3.63V or 2.625V 150 µA
/D, VIN = VCC = 3.63V or 2.625V 5
IIL Input Low Current D, VIN = 0V, VCC = 3.63V or 2.625V -5 µA
/D, VIN = 0V, VCC = 3.63V or 2.625V -150
VPP Peak-to-Peak Input Volta ge VIL ≥ -0.3V 0.15 1.3 V
VIHCMR Input High Common Mode
Range Note 7 GND + 0.5 VCC – 0.85 V
Notes:
3. Permanent device dam age may occur if absolute maximum ratings are exceeded. This is a stress rating only and funct i onal operati on is not impli ed
at conditions other than those detailed in the operati onal s ections of this data sheet. Exposure to absol ute maximum ratings conditions may affect
device reliabil it y.
4. The datas heet limits are not guaranteed i f t he device is operated beyond the recommended operating conditions.
5. The ci rcuit is designed to meet the DC specifications shown in the above tables after thermal equil i bri um has been established.
6. Outputs terminated with 50Ω to VCC/2. See Parameter Measurement Set-Up.
7. VIHCMR maximum varies 1:1 with VCC. The VIHCMR range is referenced to the most positive side of the differential input signal.
March 21, 2014 3 Revision 1.0
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Micrel, Inc.
SY733021U
AC Electrical Characteristics
VCC = +2.5V ±5% or +3.3V ±10%; TA = -40°C to +85°C
Symbol Parameter Condition Min. Typ. Max. Units
fMAX Maximum Frequency 350 MHz
tPD Propagation Delay Note 8, +2.5V ±5% supply 1.7 1.9 2.5 ns
Note 8, +3.3V ±10% supply 1.5 1.8 2.3
tSkew Part-to-Part skew Notes 9 and 10 500 ps
tR, tF Output Rise/Fall Times 20%–80% at 100 MHz, +2.5V ±5% supply 125 200 400 ps
20%–80% at 100 MHz, +3.3V ±10% supply 100
TRJ_Jitter Additive Phase Jitter 12kHz–20MHz at 100MHz 130 fsRMS
637kHz–10MHz at 100MHz 90 fsRMS
TDCY Duty C ycle 45 50 55 %
Notes:
8. Measured from the diff erent i al input crossing poi nt t o Vcc/2 at the output.
9. Part-to-Part skew is the difference in time between outputs receiving data from the same input, for the same temperature, voltage, and transition.
10. This paramet er is defined i n accordance with JEDEC Standard 65.
March 21, 2014 4 Revision 1.0
hbwhelp@micrel.com or (408) 955-1690
Micrel, Inc.
SY733021U
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL +1 (408) 944-0800 FAX +1 (408) 474-100 0 WEB http://www.micrel.com
Micrel makes no represent ations or warranties with respec t t o the accuracy or completeness of the information furnis hed in this data sheet. This
informat i on is not intended as a warranty and Micrel does not assume responsibility for its use. Micrel reserves the right to change circuitry,
specificat i ons and descript i ons at any time without notice. No license, whether express , im plied, aris i ng by estoppel or otherwise, t o any intellectual
property rights is granted by this document. Except as provided in Micrel’s terms and conditions of sale for such products, Micrel assumes no liability
whatsoever, and Micrel disclaims any express or implied warranty relating to the sale and/or use of Micrel products including liabil ity or warranties
relating to fitness for a partic ular purpose, merchant abi lit y, or inf ri ngem ent of any patent, copyright or other int el lectual property right.
Micrel Products are not designed or authorized for use as components in life support applianc es, devic es or systems where malfunction of a product
can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical
implant into the body or (b) support
or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A
Purchaser’s use or sale of Micrel Products for use in lif e support appliances, devices or systems is a Purchas er’s own risk and Purcha
ser agrees to fully
indemnify Mic rel for any damages resulting from such use or sale.
© 2014 Micrel, Incorporated.
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