TRIPLE LVPECL-TO-PECL OR PECL-TO-LVPECL TRANSLATOR FEATURES DESCRIPTION ■ 5V and 3.3V power supplies required The SY100EL92 is a triple LVPECL-to-PECL or PECLto-LVPECL translator. The device receives standard PECL signals and translates them to differential LVPECL output signals (or vice versa). SY100EL92 can also be used as a differential line receiver for PECL-to-PECL or LVPECL-toLVPECL signals. However, please note that for the latter we will need two different power supplies. Please refer to Function Table for more details. VBB outputs are provided for interfacing single ended input signals. If a single ended input is to be used, the VBB output should be connected to the D input and the active signal will drive the D input. When used, the VBB should be bypassed to VCC via a 0.01µF capacitor. The VBB is designed to act as a switching reference for the SY100EL92 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 SY100EL92 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 0.01µF capacitor. To accomplish the LVPECL-to-PECL level translation, the SY100EL92 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. For differential LVPECL input VCC_VBB can be either 3.3V or 5V. Under open input conditions, the D input will be biased at a VCC/2 voltage level and the D input will be pulled to GND. This condition will force the "Q" output low, ensuring stability. ■ Also, supports LVPECL-to-PECL translation ■ 500ps propagation delays ■ Fully differential design ■ Differential line receiver capability ■ Application note ■ Available in 20-pin SOIC package PIN CONFIGURATION/BLOCK DIAGRAM 20 VCC VCC_VBB 1 D0 2 19 Q0 D0 3 18 Q0 4 17 VCCO D1 5 16 Q1 D1 6 15 Q1 VBB 7 14 VCCO D2 8 13 Q2 D2 12 Q2 11 VCC VBB SY100EL92 9 GND 10 SOIC TOP VIEW PIN NAMES FUNCTION TABLE Function Vcc Vcco Vcc_VBB PECL-to-LVPECL 5.0V 3.3V 5.0V Dn PECL / LVPECL Inputs LVPECL-to-PECL 5.0V 5.0V 3.3V Qn PECL / LVPECL Outputs PECL-to-PECL 5.0V 5.0V 5.0V VBB PECL / LVPECL Reference Voltage Output LVPECL-to-LVPECL 5.0V 3.3V 3.3V VCCO VCC for Output VCC_VBB VCC for VBB Output GND Common Ground Rail VCC VCC for Internal Circuitry Pin Function Rev.: D 1 Amendment: /0 Issue Date: January, 1999 SY100EL92 Micrel PECL INPUT DC ELECTRICAL CHARACTERISTICS VCC_VBB = VCC = +4.5V to +5.5V; VCCO = +3.0V to +3.8V TA = –40°C Symbol VCC TA = 0°C TA = +25°C TA = +85°C Parameter Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit Power Supply Voltage 4.5 — 5.5 4.5 — 5.5 4.5 — 5.5 4.5 — 5.5 V Input HIGH Voltage(1) 3.835 — 4.120 3.835 — 4.120 3.835 — 4.120 3.835 — 4.120 V VIL Input LOW Voltage(1) 3.190 — 3.515 3.190 — 3.525 3.190 — 3.525 3.190 — 3.525 V VPP Minimum Peak-to-Peak 150 — — 150 — — 150 — — 150 — — mV — — 150 — — 150 — — 150 — — 150 µA 0.5 –600 — — — — 0.5 –600 — — — — 0.5 –600 — — — — 0.5 –600 — — — — µA 3.620 — 3.740 3.620 — 3.740 3.620 — 3.740 3.620 — 3.740 V — — 12 — — 12 — 8.0 12 — — 12 mA VIH Input IIH Input HIGH Current IIL Input LOW Current VBB Output Reference(1) ICC Power Supply Current Dn Dn NOTE: 1. These levels are for VCC_VBB = 5.0V. Level specifications will vary 1:1 with VCC_VBB. LVPECL OUTPUT DC ELECTRICAL CHARACTERISTICS VCC_VBB = VCC = +4.5V to +5.5V; VCCO = +3.0V to +3.8V TA = –40°C Symbol VCCO TA = 0°C Parameter Min. Typ. Max. Power Supply Voltage Min. Typ. TA = +25°C TA = +85°C Max. Min. Typ. Max. Min. Typ. Max. Unit 3.8 3.0 3.3 3.8 3.0 — 3.8 V 3.0 — 3.8 3.0 — Output HIGH Voltage(1) 2.215 — 2.420 2.275 — 2.420 2.275 2.350 2.420 2.275 — 2.420 V VOL Output LOW Voltage(1) 1.470 — 1.745 1.490 — 1.680 1.490 1.600 1.680 1.490 — 1.680 V ICCO Power Supply Current — — 20 — — — 21 mA VOH 20 — 15 20 — 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 = VCCO = +4.5V to +5.5V TA = –40°C Symbol VCC TA = 0°C TA = +25°C TA = +85°C Parameter Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit Power Supply Voltage 4.5 — 5.5 4.5 — 5.5 4.5 — 5.5 4.5 — 5.5 V Input HIGH Voltage(2) 2.135 — 2.420 2.135 — 2.420 2.135 — 2.420 2.135 — 2.420 V VIL Input LOW Voltage(2) 1.490 — 1.825 1.490 — 1.825 1.490 — 1.825 1.490 — 1.825 V VPP Minimum Peak-to-Peak 150 — — 150 — — 150 — — 150 — — mV — — 150 — — 150 — — 150 — — 150 µA 0.5 –600 — — — — 0.5 –600 — — — — 0.5 –600 — — — — 0.5 –600 — — — — µA 1.92 — 2.04 1.92 — 2.04 1.92 — 2.04 1.92 — 2.04 V — — 12 — — 12 — 8.0 12 — — 12 mA VIH Input IIH Input HIGH Current IIL Input LOW Current VBB Output Reference(2) ICC Power Supply Current Dn Dn 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. 2 SY100EL92 Micrel PECL OUTPUT DC ELECTRICAL CHARACTERISTICS VCC_VBB = +3.0V to +3.8V; VCC = VCCO = +4.5V to +5.5V TA = –40°C Symbol TA = 0°C Parameter Min. Typ. Max. Min. Typ. VCCO Power Supply Voltage 4.5 — 5.5 4.5 VOH Output HIGH Voltage(1) 3.915 — 4.120 VOL Output LOW Voltage(1) 3.170 — ICCO Power Supply Current — — TA = +25°C TA = +85°C Max. Min. Typ. Max. Min. Typ. Max. Unit — 5.5 4.5 — 5.5 4.5 — 5.5 V 3.975 — 4.120 3.975 — 4.120 3.975 — 4.120 V 3.445 3.190 — 3.380 3.190 — 3.380 3.190 — 3.380 V 20 — — 20 — 15 20 — — 21 mA NOTE: 1. These levels are for VCCO = 5.0V. Level specifications will vary 1:1 with VCCO. AC ELECTRICAL CHARACTERISTICS(1) TA = –40°C Symbol Parameter tPLH tPHL Propagation Delay D to Q tskew Within-Device Skew Output-to-Output(2) Part-to-Part (Diff.)(2) Duty Cycle (Diff.)(3) VPP VCMR tr tf Diff. S.E. Minimum Input Swing(4) TA = 0°C TA = +25°C TA = +85°C Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit 430 410 520 540 630 710 430 410 520 540 630 710 430 410 520 540 630 710 430 410 520 540 630 710 ps — — — 20 20 25 100 200 — — — — 20 20 25 100 200 — — — — 20 20 25 100 200 — — — — 20 20 25 100 200 — ps 150 — — 150 — — 150 — — 150 — — mV 1.3 1.5 — — VCC–0.2 — — VCC–0.2 — — VCC–0.2 1.2 1.4 — — VCC–0.2 VCC–0.2 1.2 1.4 VCC–0.2 VCC–0.2 1.2 1.4 320 — 580 320 — 580 320 — 580 320 — 580 Range(5) Common Mode VPP < 500mV VPP ≥ 500mV Output Rise/Fall Times Q (20% to 80%) V VCC–0.2 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 Package Type Operating Range SY100EL92ZC Z20-1 Commercial SY100EL92ZCTR Z20-1 Commercial 3 SY100EL92 Micrel 20 LEAD SOIC .300" WIDE (Z20-1) Rev. 03 MICREL-SYNERGY TEL 3250 SCOTT BOULEVARD SANTA CLARA CA 95054 USA + 1 (408) 980-9191 FAX + 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. © 2000 Micrel Incorporated 4