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Micrel, Inc.
3V LVTTL-TO-DIFFERENTIAL LVPECL AND DIFFERENTIAL LVPECL-TO-LVTTL TRANSLATOR
Precision Edge SY89328L
Precision Edge(R) SY89328L (R)
FEATURES
s 3.3V 10% power supply s Guaranteed AC parameters over temperature: fMAX > 275MHz (LVTTL) s < 2ns LVPECL-to-LVTTL propagation delay s < 600ps LVTTL-to-LVPECL propagation delay s Internal 75k input pull-up and pull-down resistors s Industrial temperature range: -40C to +85C s Available in ultra-small 8-pin MLFTM (2mm x 2mm) package Precision Edge(R)
DESCRIPTION
The SY89328L is a differential LVPECL-to-LVTTL translator and an LVTTL-to-differential LVPECL translator in a single package. Because LVPECL (Positive ECL) levels are used, only +3.3V and ground are required. The SY89328L is functionally equivalent to the SY100EPT28L, but in an ultra-small 8-lead MLFTM package that features a 70% smaller footprint. This ultra-small package and the dual translation design of the SY89328L make it ideal for applications that are sending and receiving signals across a backplane.
BLOCK DIAGRAM
IN_LVPECL Q_LVTTL /IN_LVPECL Q_LVPECL IN_LVTTL /Q_LVPECL
Precision Edge is a registered trademark of Micrel, Inc. MicroLeadFrame and MLF are trademarks of Amkor Technology, Inc. M9999-072005 hbwhelp@micrel.com or (408) 955-1690
Rev.: B Amendment: /0
1
Issue Date: July 2005
Micrel, Inc.
Precision Edge(R) SY89328L
PACKAGE/ORDERING INFORMATION
IN_LVPECL /IN_LVPECL Q_LVPECL /Q_LVPECL
1 2 3 4 8 7 6 5
VCC Q_LVTTL IN_LVTTL GND
Ordering Information
Part Number SY89328LMITR SY89328LMGTR Package Type MLF-8 MLF-8 Operating Range Industrial Industrial Package Marking HEP28 HEP28 with Pb-Free bar-line indicator Lead Finish Sn-Pb Pb-Free NiPdAu
8-Pin MLFTM Ultra-Small Outline (2mm x 2mm)
PIN DESCRIPTION
Pin Number 1, 2 7 6 3, 4 8 5 Pin Name IN_LVPECL, /IN_LVPECL Q_LVTTL IN_LVTTL Q_LVPECL, /Q_LVPECL VCC GND, Exposed Pad Type 100k ECL Input Pin Function Differential LVPECL Input: Includes internal 75k pull-down resistor on internal 75k pull-up and pull-down resistors on /IN. See "Input Interface Applications" section for single-ended inputs. Single-ended LVTTL Output: Translated from LVPECL input. Q_LVTTL output will default LOW with IN_LVPECL and /IN_LVPECL inputs left open. Single-ended LVTTL Input. Differential LVPECL Output: Translated from LVTTL input. See "Output Interface Applications" section for recommendations on terminations. Positive Power Supply: Bypass with 0.1F//0.01F low ESR capacitors. GND and exposed pad must be tied to ground plane.
LVTTL Output LVTTL Input 100k ECL Output VCC Power Ground
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2
Micrel, Inc.
Precision Edge(R) SY89328L
Absolute Maximum Ratings(Note 1)
Supply Voltage (VCC) .................................. -0.5V to +3.8V Input Voltage (VIN) ......................................... -0.5V to VCC LVPECL Output Current (IOUT) Continuous ............................................................. 50mA Surge .................................................................... 100mA Input Current Source or sink current on IN, /IN .......................... 50mA Lead Temperature (soldering, 20 sec.) ................... +260C Storage Temperature (TS) ....................... -65C to +150C
Note 1.
Operating Ratings(Note 2)
Supply Voltage (VCC) ...................................... 3.0V to 3.6V Ambient Temperature (TA) ......................... -40C to +85C Package Thermal Resistance, Note 3 MLFTM (JA) Still-Air ................................................................. 93C/W 500lfpm ............................................................... 87C/W MLFTM (JB) Junction-to-Board ................................................ 60C/W
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. The data sheet limits are not guaranteed if the device is operated beyond the operating ratings. Package thermal resistance assumes exposed pad is soldered (or equivalent) to the devices most negative potential on the PCB.
Note 2. Note 3.
DC ELECTRICAL CHARACTERISTICS(Note 4)
Symbol VCC ICC Parameter Power Supply Voltage Power Supply Current Max VCC, No Load Condition Min 3.0 Typ 3.3 22 Max 3.6 40 Units V mA
LVPECL DC ELECTRICAL CHARACTERISTICS(Note 4)
VCC = +3.3V10% and VEE = 0V; RL = 50 to VCC-2V; TA = -40C to +85C, unless otherwise noted. Symbol VOH VOL VIH VIL VCMR IIH IIL Parameter Output HIGH Voltage Output LOW Voltage Input HIGH Voltage Input LOW Voltage LVPECL Common Mode Range Input HIGH Current Input LOW Current IN /IN
Note 4.
Condition
Min
Typ
Max
Units V V V V V A A A
VCC-1.145 VCC-1.020 VCC-0.895 VCC-1.945 VCC-1.820 VCC-1.695 VCC-1.225 VCC-1.945 1.2 VIN = 3.46V 0.5 -300 VCC-0.880 VCC-1.625 VCC 150
The circuit is designed to meet the DC specifications shown in the above table after thermal equilibrium has been established.
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Micrel, Inc.
Precision Edge(R) SY89328L
LVTTL DC ELECTRICAL CHARACTERISTICS(Note 5)
VCC = +3.3V10%; CL = 20pF, TA = -40C to +85C, unless otherwise noted. Symbol VOH VOL VIH VIL VIK IIH IIL IOUT(SC) Parameter Output HIGH Voltage Output LOW Voltage Input HIGH Voltage Input LOW Voltage Input Clamp Voltage Input HIGH Current IIK = -18mA VIN = 2.7V VIN = VCC Input LOW Current LVTTL Output Short-Circuit Current VIN = 0.5V VOUT = 0V Condition IOH = -3mA IOH = -24mA Min 2.0 -- 2.0 -- -- -- -- -- -275 Typ -- -- -- -- -- -- -- -- -- Max -- 0.5 -- 0.8 -1.2 20 100 -0.2 -80 Units V V V V V A A A mA
AC ELECTRICAL CHARACTERISTICS
VCC = +3.3V10%. TA = -40C to +85C, unless otherwise noted. Symbol fMAX tpd Parameter Maximum Frequency LVPECL LVTTL Propagation Delay IN_LVPECL-to-Q_LVTTL IN_LVTTL-to-Q_LVPECL VPP tDC tJitter tr, tf LVPECL Input Voltage Swing (Single-Ended) Duty Cycle Cycle-toCycle Jitter Total Jitter LVPECL Output Rise/Fall Times (20% to 80%) LVTTL Output Rise/Fall Times (10% to 90%)
Note 5. Note 6. Note 7. Note 8. Note 9.
Condition Note 6 Note 7 Note 7 Note 6 Note 8
Min 700 275 1.5 100 100 45
Typ -- 350 -- 400 -- 50
Max -- -- 2.5 600 -- 55 <1 20
Units MHz MHz ns ps mV % psRMS psPP ns ns
Note 9 Note 10 At full output swing, Note 5 At full output swing, Note 6 200 0.5 -- --
500 1.0
The circuit is designed to meet the DC specifications shown in the above table after thermal equilibrium has been established. RL = 50 to VCC -2V CL = 20pF VPP (min) is the minimum input swing for which AC parameters are guaranteed. Cycle-to-cycle jitter definition: the variation of periods between adjacent cycles, Tn - Tn-1,where T is the time between rising edges of the output signal.
Note 10. Total jitter definition: with an ideal clock input of frequency fMAX, no more than one output edge in 1012 output edge will deviate by more than the specified peak-to-peak jitter value.
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Micrel, Inc.
Precision Edge(R) SY89328L
LVPECL INPUT INTERFACE APPLICATIONS
+3.3V 1k IN +3.3V
VCC --1.3V 1.6k
Figure 1. Single-Ended Input (Terminating unused input)
LVPECL OUTPUT INTERFACE APPLICATIONS
+3.3V
+3.3V
130 ZO = 50 ZO = 50 VCC --2V82
130
+3.3V
+3.3V
ZO = 50 ZO = 50 50 50 50
+3.3V
82
VCC --2V C (Optional) 0.01F
Figure 2a. Parallel Thevenin-Equivalent Termination
Figure 2b. Three Resistor "Y Termination"
+3.3V +3.3V +3.3V 130 130 ZO = 50 VCC --2V 82 1k +3.3V
82
1.6k VCC --1.3V
Figure 2c. Terminating Unused I/O
M9999-072005 hbwhelp@micrel.com or (408) 955-1690
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Micrel, Inc.
Precision Edge(R) SY89328L
8 LEAD ULTRA-SMALL EPAD-MicroLeadFrameTM (MLF-8)
Package EP- Exposed Pad
Die
CompSide Island
Heat Dissipation Heat Dissipation VEE Heavy Copper Plane VEE Heavy Copper Plane
PCB Thermal Consideration for 8-Pin MLFTM Package Package Notes: Note 1. Package meets Level 2 qualification. Note 2. All parts are dry-packaged before shipment. Note 3. Exposed pads must be soldered to a ground for proper thermal management.
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131
TEL
USA
+ 1 (408) 944-0800
FAX
+ 1 (408) 474-1000
WEB
http://www.micrel.com
The information furnished by Micrel in this datasheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer. Micrel Products are not designed or authorized for use as components in life support appliances, devices 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 life support appliances, devices or systems is at Purchaser's own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale. (c) 2005 Micrel, Incorporated. M9999-072005 hbwhelp@micrel.com or (408) 955-1690
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