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| 3.3V TRIPLE LVPECL-to-ECL OR LVPECL-to-LVECL TRANSLATOR FEATURES s 3.3V power supply s 620ps propagation delay s Fully differential design s Supports low voltage operation s Available in 20-pin SOIC package SY100EL91L DESCRIPTION The SY100EL91L is a triple LVPECL-to-ECL or LVPECL-to-LVECL translator. A VBB output is provided for interfacing with single ended PECL signals at the input. If a single ended input is to be used, the VBB output should be connected to the D input. The active signal would then drive the D input. When used, the VBB output should be bypassed to ground via a 0.01F capacitor. The VBB output is designed to act as the switching reference for the EL91L under single ended input switching conditions. As a result this pin can only source/sink up to 0.5mA of current. To accomplish the level translation the EL91L requires three power rails. The VCC supply should be connected to the positive supply, and the VEE pin should be connected to the negative power supply. The GND pins as expected are connected to the system ground plane. Both VEE and VCC should be bypassed to ground via 0.01F capacitors. Under open input conditions, the D input will be biased at VCC/2 and the D input will be pulled to GND. This condition will force the Q output to a LOW, ensuring stability. PIN CONFIGURATION/BLOCK DIAGRAM VCC 1 D0 2 D0 3 20 VCC 19 18 ECL PECL Q0 Q0 GND Q1 Q1 GND ECL PECL_VBB 4 D1 5 D1 6 PECL_VBB 7 PECL PECL 17 16 15 14 13 12 11 ECL PIN NAMES Q2 Q2 D2 8 D2 9 Pin Dn PECL Inputs ECL Outputs Qn PECL_VBB Function VEE 10 VCC PECL Reference Voltage Output SOIC TOP VIEW FUNCTION TABLE Function LVPECL-to-ECL LVPECL-to-LVECL Vcc 3.3V 3.3V VEE -5.0V -3.3V Rev.: F Amendment: /2 1 Issue Date: November, 1999 Micrel SY100EL91L 3.3V LVPECL INPUT DC ELECTRICAL CHARACTERISTICS(1) TA = -40C Symbol VCC VIH VIL IIH IIL VBB ICC Parameter Power Supply Voltage Input HIGH Input LOW Voltage(2) Voltage(2) Min. 3.0 2.135 1.490 -- 0.5 -600 1.920 -- Typ. -- -- -- -- -- -- -- -- Max. 3.8 Min. 3.0 TA = 0C Typ. -- -- -- -- -- -- -- -- Max. 3.8 Min. 3.0 TA = +25C Typ. 3.3 Max. 3.8 Min. 3.0 TA = +85C Typ. -- -- -- -- -- -- -- -- Max. 3.8 2.420 1.825 150 -- -- 2.040 10 Unit V V V A 2.420 2.135 1.825 1.490 150 -- -- -- 0.5 -600 2.420 2.135 2.350 2.420 2.135 1.825 1.490 150 -- -- -- 0.5 -600 -- -- -- -- -- 6.0 1.825 1.490 150 -- -- -- 0.5 -600 Input HIGH Current Input LOW Current Dn Dn Output Reference(2) Power Supply Current A V mA 2.040 1.920 10 -- 2.040 1.920 10 -- 2.040 1.920 10 -- NOTES: 1. Parametric values specified at: 3 volt Power Supply Range 100EL91L Series 2. These levels are for VCC = 3.3V. Level specifications will vary 1:1 with VCC. -3.0V to -3.8V. ECL/LVECL OUTPUT DC ELECTRICAL CHARACTERISTICS(1) TA = -40C Symbol VEE VOH VOL IEE Parameter Power Supply Voltage ECL LVECL TA = 0C Min. -4.2 -3.0 -1025 -- Typ. -- -- -- -- -- Max. -5.5 -3.8 -880 28 TA = +25C Min. -4.2 -3.0 -1025 -- Typ. -- -- -955 22 Max. -5.5 -3.8 -880 28 TA = +85C Min. -4.2 -3.0 -1025 -1810 -- Typ. -- -- -- -- -- Max. -5.5 -3.8 -880 -1620 30 Unit V mV mV mA Min. -4.2 -3.0 -1085 -1830 -- Typ. -- -- -- -- -- Max. -5.5 -3.8 -880 28 Output HIGH Voltage Output LOW Voltage Power Supply Current -1555 -1810 -1620 -1810 -1705 -1620 NOTE: 1. Parametric values specified at: 3 volt Power Supply Range 100EL91L Series -3.0V to -3.8V. 2 Micrel SY100EL91L AC ELECTRICAL CHARACTERISTICS(4) LVPECL: VCC = +3.0V to +3.8V, ECL: VEE = -4.2V to -5.5V, LVECL: VEE = -3.0V to -3.8V TA = -40C Symbol tPLH tPHL tskew Parameter Propagation Delay D to Q Diff. S.E. Min. 490 440 -- -- -- 150 1.3 1.5 320 Typ. 590 590 40 -- 25 -- -- -- 400 Max. 690 740 100 200 -- -- VCC-0.2 VCC-0.2 TA = 0C Min. 510 460 -- -- -- 150 1.2 1.4 320 Typ. 610 610 40 -- 25 -- -- -- 400 Max. 710 760 100 200 -- -- VCC-0.2 VCC-0.2 TA = +25C Min. 520 470 -- -- -- 150 1.2 1.4 320 Typ. 620 620 40 -- 25 -- -- -- 400 Max. 720 770 100 200 -- -- VCC-0.2 VCC-0.2 TA = +85C Min. 560 510 -- -- -- 150 1.2 1.4 320 Typ. 660 660 40 -- 25 -- -- -- 400 Max. Unit 760 810 100 200 -- -- VCC-0.2 VCC-0.2 ps Within-Device Skew(1) Output-to-Output Part-to-Part (Diff.) Duty Cycle (Diff.) Minimum Input Swing(2) Common Mode VPP < 500mV VPP > 500mV Output Rise/Fall Times Q (20% to 80%) Range(3) ps VPP VCMR mV V tr tf 580 580 580 580 ps NOTES: 1. Skew is measured between outputs under identical transitions. 2. Minimum input swing for which AC parameters are guaranteed. The device has a DC gain of ~40. 3. 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. 4. Parametric values specified at: 3 volt Power Supply Range 100EL91L Series -3.0V to -3.8V. PRODUCT ORDERING CODE Ordering Code SY100EL91LZC SY100EL91LZCTR Package Type Z20-1 Z20-1 Operating Range Commercial Commercial 3 Micrel SY100EL91L LVPECL-TO-ECL MODE CONFIGURATION VCC = +3.3V VCC = +3.3V VCC = +3.3V VCC = 0V 125 83 125 R1 R2 R1 D0 2 D0 3 19 18 Q0 Q0 83 R3 R4 R3 125 83 R1 R2 R1 LVPECL DEVICE R3 VEE = 0V Single Ended Mode D1 5 D1 6 16 15 14 Q1 Q1 R2 LVPECL_VBB 4 17 ECL GND VEE = -3.3V R4 VCC = +3.3V VCC = 0V R2 VCC 1 20 ECL VCC 125 LVPECL LVPECL ECL DEVICE 83 R3 R4 LVPECL_VBB 7 GND Q2 Q2 VCC 0.1F VEE = 0V D2 8 D2 9 VEE 10 13 12 11 VEE = -3.3V Unused VCC = +3.3V Input VEE = 0V -3.3V VEE = -3.3V 3.3V Configuration VCC = +3.3V VCC = +3.3V VCC = +3.3V 125 VCC = 0V 83 125 R1 R2 R1 D0 2 D0 3 19 18 Q0 Q0 R3 83 83 R3 R4 125 R1 R2 R1 LVPECL DEVICE R3 VEE = 0V Single Ended Mode D1 5 D1 6 16 15 14 Q1 Q1 R2 LVPECL_VBB 4 17 ECL GND VEE = -5V R4 VCC = +3.3V VCC = 0V R2 VCC 1 20 ECL VCC R4 125 LVPECL LVPECL LVPECL ECL ECL DEVICE 83 R4 R3 LVPECL_VBB 7 0.1F GND Q2 Q2 VCC VEE = 0V D2 8 D2 9 VEE 10 13 12 11 VEE = -5V Unused VCC = +3.3V Input VEE = 0V -5V VEE = -5V 5.0V Configuration NOTES: 1. The schematic above demonstrates three different ways that all or any inputs of SY100EL91L can be used. The three modes or operation are: Differential LVPECL, Single-Ended LVPECL, and/or Open. 2. If D2 an D2 are used in differential mode, then the same scheme of D0 and D0 applies. If used in single-ended mode, then use the same scheme of D1 and D1. 4 R4 LVPECL ECL Micrel SY100EL91L 20 LEAD SOIC .300" WIDE (Z20-1) Rev. 03 MICREL-SYNERGY TEL 3250 SCOTT BOULEVARD SANTA CLARA CA 95054 USA FAX + 1 (408) 980-9191 + 1 (408) 914-7878 WEB 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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