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| QUINT LVPECL-TO-PECL OR PECL-TO-LVPECL TRANSLATOR FEATURES s s s s s s 3.3V and 5V power supplies required Also, supports LVPECL-to-PECL translation 500ps propagation delays Fully differential design Differential line receiver capability Available in 28-pin PLCC package SY100E417 DESCRIPTION The SY100E417 is a quint LVPECL-to-PECL translator. It can also be used as a quint PECL-to-LVPECL translator. The device receives standard PECL signals and translates them to differential LVPECL output signals (or vice versa). The SY100E417 can also be used as a differential line receiver for PECL-to-PECL or LVPECL-to-LVPECL signals. However, please note that for the latter we will need two different power supplies. Please refer to Function Table for more details. A VBB output is provided for interfacing single ended input signals. If a single ended input is to be used, the VBB output should be connected to the Dn input and the active signal will drive the Dn input. When used, the VBB should be bypassed to VCC via a 0.01F capacitor. The VBB is designed to act as a switching reference for the SY100E417 under single ended input conditions. As a result, the pin can only source/sink 0.5mA of current. To accomplish the PECL-to-LVPECL level translation, the SY100E417 requires three power rails. The VCC and VCC_VBB supply is to be connected to the standard PECL supply, the 3.3V supply is to be connected to the VCCO supply, and GND is connected to the system ground plane. Both the VCC and VCCO should be bypassed to ground with a 0.01F capacitor. To accomplish the LVPECL-to-PECL level translation, the SY100E417 requires three power rails as well. The 5.0V supply is connected to the VCC and VCCO pins, 3.3V supply is connected to the VCC_VBB pin and GND is connected to the system ground plane. VCC_VBB is used to provide a proper VBB output level if a single ended input is used. VCC_VBB = 3.3V is only required for single-ended LVPECL input. For differential LVPECL input, VCC_VBB can be either 3.3V or 5.0V. Under open input conditions, the Dn input will be biased at a VCC/2 voltage level and the Dn input will be pulled to GND. This condition will force the "Qn" output low, ensuring stability. BLOCK DIAGRAM D0 D0 D1 D1 D2 D2 D3 D3 D4 D4 VBB Q0 Q0 Q1 Q1 Q2 Q2 Q3 Q3 Q4 Q4 FUNCTION TABLE Function PECL-to-LVPECL LVPECL-to-PECL PECL-to-PECL LVPECL-to-LVPECL Vcc 5.0V 5.0V 5.0V 5.0V Vcco 3.3V 5.0V 5.0V 3.3V Vcc_VBB 5.0V 3.3V 5.0V 3.3V Rev.: B Amendment: /1 1 Issue Date: March, 1999 Micrel SY100E417 PIN CONFIGURATION D4 D4 VCC_VBB Q4 Q4 VCCO PIN NAMES Pin Dn Qn VBB 18 17 Function PECL / LVPECL Inputs PECL / LVPECL Outputs Reference Voltage Output VCC for Outputs VCC for VBB Output Common Ground Rail VCC for Internal Circuitry 25 24 23 22 21 20 19 D3 D3 D2 D2 GND VBB D0 D0 26 27 28 1 2 3 4 5 6 7 8 9 10 11 TOP VIEW PLCC J28-1 16 15 14 13 12 Q3 Q3 VCC Q2 Q2 VCCO Q1 VCCO VCC_VBB GND VCC D1 D1 PECL INPUT DC ELECTRICAL CHARACTERISTICS VCC_VBB = VCC = +4.5V to +5.5V TA = -40C Symbol VCC VIH VIL VPP IIH IIL VBB ICC Parameter Power Supply Voltage Input HIGH Input LOW Input Input HIGH Current Input LOW Current Output Reference(1) VCCO Q1 VCCO Q0 Q0 TA = 0C Min. 4.5 3.835 3.190 TA = +25C Max. 5.5 4.120 3.525 TA = +85C Min. 4.5 3.835 3.190 Min. 4.5 3.835 3.190 Typ. -- -- -- Max. 5.5 4.120 3.515 Typ. -- -- -- Min. 4.5 3.835 3.190 Typ. -- -- -- Max. 5.5 4.120 3.525 Typ. -- -- -- Max. 5.5 4.120 3.525 Unit V V V Voltage(1) Voltage(1) Minimum Peak-to-Peak 150 -- -- -- -- -- -- -- 150 -- -- 3.740 150 -- 0.5 -600 3.620 -- -- -- -- -- -- 150 -- -- 3.740 150 -- 0.5 -600 3.620 -- -- -- -- -- -- 150 -- -- 3.740 150 -- 0.5 -600 3.620 -- -- -- -- -- -- 150 -- -- 3.740 mV A A Dn Dn 0.5 -600 3.620 V mA Power Supply Current -- -- 20 -- -- 20 -- 14 20 -- -- 20 NOTE: 1. These levels are for VCC_VBB = 5.0V. Level specifications will vary 1:1 with VCC_VBB. 2 Micrel SY100E417 LVPECL OUTPUT DC ELECTRICAL CHARACTERISTICS VCC = +4.5V to +5.5V; VCCO = +3.0V to 3.8V TA = -40C Symbol VCCO VOH VOL ICCO Parameter Power Supply Voltage Output HIGH Voltage(1) Output LOW Voltage(1) Min. 3.0 2.215 1.470 -- Typ. -- -- -- -- Max. 3.8 2.420 1.745 35 3.0 2.275 1.490 -- TA = 0C Min. Typ. -- -- -- -- Max. 3.8 Min. 3.0 TA = +25C Typ. 3.3 Max. 3.8 3.0 TA = +85C Min. Typ. -- -- -- -- Max. 3.8 2.420 1.680 37 Unit V V V mA 2.420 2.275 2.350 2.420 2.275 1.680 1.490 1.600 1.680 1.490 35 -- 23 35 -- Power Supply Current NOTE: 1. These levels are for VCCO = 3.3V. Level specifications will vary 1:1 with VCCO. LVPECL INPUT DC ELECTRICAL CHARACTERISTICS VCC_VBB = +3.0V to +3.8V(1); VCC = +4.5V to +5.5V TA = -40C Symbol VCC VIH VIL VPP IIH IIL VBB ICC Parameter Power Supply Voltage Input HIGH Voltage(2) Input LOW Voltage(2) Minimum Peak-to-Peak TA = 0C Min. 4.5 2.135 1.490 TA = +25C Max. 5.5 2.420 1.825 TA = +85C Min. 4.5 2.135 1.490 Min. 4.5 2.135 1.490 Typ. -- -- -- Max. 5.5 2.420 1.825 Typ. -- -- -- Min. 4.5 2.135 1.490 Typ. -- -- -- Max. 5.5 2.420 1.825 Typ. -- -- -- Max. 5.5 2.420 1.825 Unit V V V 150 -- -- -- -- -- -- -- 150 -- -- 2.04 150 -- 0.5 -600 1.92 -- -- -- -- -- -- 150 -- -- 2.04 150 -- 0.5 -600 1.92 -- -- -- -- -- -- 150 -- -- 2.04 150 -- 0.5 -600 1.92 -- -- -- -- -- -- 150 -- -- 2.04 mV A A Input Input HIGH Current Input LOW Current Output Reference(2) Dn Dn 0.5 -600 1.92 V mA Power Supply Current -- -- 20 -- -- 20 -- 14 20 -- -- 20 NOTES: 1. VCC_VBB = 3.3V is only required for single-ended LVPECL input. For differential LVPECL input, VCC_VBB can be either 3.3V or 5V. 2. These levels are for VCC_VBB = 3.3V. Level specifications will vary 1:1 with VCC_VBB. 3 Micrel SY100E417 PECL OUTPUT DC ELECTRICAL CHARACTERISTICS VCC = VCCO = +4.5V to +5.5V TA = -40C Symbol VCCO VOH VOL ICCO Parameter Power Supply Voltage Output HIGH Voltage(1) Output LOW Voltage(1) Min. 4.5 3.915 3.170 TA = 0C Min. Typ. 4.5 3.975 3.190 TA = +25C Max. 5.5 4.120 3.380 TA = +85C Min. 4.5 3.975 3.190 Typ. -- -- -- Max. 5.5 4.120 3.445 Min. 4.5 3.975 3.190 Typ. -- -- -- Max. 5.5 4.120 3.380 Typ. -- -- -- Max. 5.5 4.120 3.380 Unit V V V -- -- -- Power Supply Current -- -- 35 -- -- 35 -- 23 35 -- -- 37 mA NOTES: 1. These levels are for VCCO = 5.0V. Level specifications will vary 1:1 with VCCO. AC ELECTRICAL CHARACTERISTICS(1) TA = -40C Symbol tPLH tPHL tskew Parameter Propagation Delay D to Q Diff. S.E. Min. Typ. 410 380 -- -- -- 150 1.3 1.5 320 510 530 20 20 25 -- -- -- -- Max. 610 680 100 200 -- -- VCC-0.2 VCC-0.2 TA = 0C Min. 410 380 -- -- -- 150 1.2 1.4 320 Typ. 510 530 20 20 25 -- -- -- -- Max. 610 680 100 200 -- -- VCC-0.2 VCC-0.2 TA = +25C Min. 410 380 -- -- -- 150 1.2 1.4 320 Typ. 510 530 20 20 25 -- -- -- -- Max. 610 680 100 200 -- -- VCC-0.2 VCC-0.2 TA = +85C Min. 410 380 -- -- -- 150 1.2 1.4 320 Typ. 510 530 20 20 25 -- -- -- -- Max. Unit 610 680 100 200 -- -- VCC-0.2 VCC-0.2 ps Within-Device Skew Output-to-Output(2) Part-to-Part (Diff.)(2) Duty Cycle (Diff.)(3) Minimum Input Swing(4) Common Mode VPP < 500mV VPP 500mV Output Rise/Fall Times Q (20% to 80%) Range(5) ps VPP VCMR mV V tr tf 580 580 580 580 ps NOTES: 1. Power supply requirements applies as indicated in the DC electrical characteristics tables. 2. Skew is measured between outputs under identical transitions. 3. Duty cycle skew is the difference between a TPLH and TPHL propagation delay through a device Common Mode Range. 4. Minimum input swing for which AC parameters are guaranteed. The device has a DC gain of ~40. 5. The CMR range is referenced to the most positive side of the differential input signal. Normal operation is obtained if the HIGH level falls within the specified range and the peak-to-peak voltage lies between VPP min. and 1V. PRODUCT ORDERING CODE Ordering Code SY100E417JC SY100E417JCTR Package Type J28-1 J28-1 Operating Range Commercial Commercial Ordering Code SY100E417JI SY100E417JITR Package Type J28-1 J28-1 Operating Range Industrial Industrial 4 Micrel SY100E417 28 LEAD PLCC (J28-1) Rev. 03 MICREL-SYNERGY TEL 3250 SCOTT BOULEVARD FAX SANTA CLARA WEB CA 95054 USA + 1 (408) 980-9191 + 1 (408) 914-7878 http://www.micrel.com This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel Inc. (c) 2000 Micrel Incorporated 5 |
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