2.5V/3.3V/5V 1:2 DIFFERENTIAL PECL/LVPECL/ECL FANOUT BUFFER FEATURES DESCRIPTION ■ 2.5V, 3.3V and 5V power supply options ■ Guaranteed AC parameters over temperature: • fMAX > 3.0GHz • < 20ps output-to-output skew • < 200ps tr / tf • < 300ps propagation delay ■ Wide temperature range: –40°C to +85°C ■ Available in 8-pin (3mm) MSOP and SOIC packages The SY10/100EP11U is a precision, high-speed 1:2 differential fanout buffer. Having within-device skews and output transition times significantly improved over the EL11V, the EP11U is ideally suited for those applications which require the ultimate in AC performance. The differential inputs of the EP11U employ clamping circuitry to maintain stability under open input conditions. If the inputs are left open (pulled to VEE), the Q outputs will go LOW. PIN CONFIGURATION/BLOCK DIAGRAM PIN NAMES Pin Q0 1 8 VCC 2 Q1 3 75kΩ 7 D 6 /D PECL, LVPECL, ECL, LVECL Clock or Data Input: Internal 75kΩ pulldown resistor. If left floating, pin defaults LOW, QOUT goes LOW. /D PECL, LVPECL, ECL, LVECL complementary Clock or Data Input: Internal 75kΩ pull-up and down resistors. If left open, default is VCC/2. When the input is not used, it can be left open. Q0, /Q0 Q1, /Q1 PECL, LVPECL, ECL, LVECL Outputs: Terminates to VCC –2V. VCC Positive Power Supply: Bypass with 0.1µF//0.01µF low ESR capacitors. VEE Negative Power Supply: For PECL operation, connect to GND. VEE 75kΩ /Q1 4 VEE 75kΩ VCC 5 VEE VEE 8-pin MSOP and SOIC Packages Function D VCC /Q0 SY10EP11U SY100EP11U CROSS REFERENCE TABLE Micrel Semiconductor ON Semiconductor SY10EP11UZI/KI MC10EP11D/DT SY10EP11UZI/KI MC10LVEP11D/DT SY100EP11UZI/KI MC100EP11D/DT SY100EP11UZI/KI MC100LVEP11D/DT Rev.: B 1 Amendment: /0 Issue Date: September 2001 SY10EP11U SY100EP11U Micrel ABSOLUTE MAXIMUM RATINGS(1) Symbol Rating Value Unit 6V V –6.0 to 0 +6.0 to 0 V V 50 100 mA VCC — VEE Power Supply Voltage VIN Input Voltage (VCC = 0V, VIN not more negative than VEE) Input Voltage (VEE = 0V, VIN not more positive than VCC) IOUT Output Current TA Operating Temperature Range –40 to +85 °C Tstore Storage Temperature Range –65 to +150 °C θJA Package Thermal Resistance (Junction-to-Ambient) θJC –Continuous –Surge –Still-Air –500lfpm (SOIC) (SOIC) 160 109 °C/W –Still-Air –500lfpm (MSOP) (MSOP) 206 155 °C/W (SOIC) (MSOP) 39 39 °C/W Package Thermal Resistance (Junction-to-Case) NOTE: 1. 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. DC ELECTRICAL CHARACTERISTICS(1) TA = –40°C Symbol TA = +25°C TA = +85°C Parameter Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Power Supply Voltage (PECL) (LVPECL) (ECL) (LVECL) 4.5 2.37 –5.5 –3.8 5.0 — –5.0 –3.3 5.5 3.8 –4.5 –2.37 4.5 2.37 –5.5 –3.8 5.0 — –5.0 –3.3 5.5 3.8 –4.5 –2.37 4.5 2.37 –5.5 –3.8 5.0 — –5.0 –3.3 5.5 3.8 –4.5 –2.37 Power Supply Current SY10EP11U SY100EP11U — — — — 37 44 — — 25 30 39 44 — — — — 40 44 mA mA IIH Input HIGH Current — — 150 — — 150 — — 150 µA VIN = VIH IIL Input LOW Current 0.5 –150 — — — — 0.5 –150 — — — — 0.5 –150 — — — — µA µA VIN = VIL VIN = VIL CIN Input Capacitance (MSOP) (SOIC) — — — — — — — — 0.75 1.1 — — — — — — — — pF pF VCC IEE D /D Unit Condition V NOTES: 1. 10/100KEP circuits are designed to meet the DC specifications shown in the above table after thermal equilibrium has been established. The circuit is in a test socket or mounted on a printed circuit board and traverse airflow greater than 500lfpm is maintained. 2 SY10EP11U SY100EP11U Micrel (10KEP) LVPECL DC ELECTRICAL CHARACTERISTICS(1) VCC = 2.5V ±5%, VEE = 0V TA = –40°C Symbol Parameter TA = +25°C TA = +85°C Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit Condition VOL Output LOW Voltage 565 690 815 630 755 880 690 815 940 mV 50Ω to VCC–2V VOH Output HIGH Voltage 1365 1490 1615 1430 1555 1680 1490 1615 1740 mV 50Ω to VCC–2V 1.2 — VCC 1.2 — VCC 1.2 — VCC VIHCMR Voltage(2) Input HIGH Common Mode Range V NOTES: 1. 10KEP circuits are designed to meet the DC specifications shown in the above table after thermal equilibrium has been established. The circuit is in a test socket or mounted on a printed circuit board and traverse airflow greater than 500lfpm is maintained. Input and output parameters are at VCC = 2.5V. They vary 1:1 with VCC. 2. The VIHCMR range is referenced to the most positive side of the differential input signal. Single-ended input CLK pin operation is limited to VCC ≥ 3.0V in PECL mode. (10KEP) LVPECL DC ELECTRICAL CHARACTERISTICS(1) VCC = 3.3V ±10%, VEE = 0V TA = –40°C Symbol TA = +25°C TA = +85°C Parameter Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit VIL Input LOW Voltage (Single-Ended) 1365 — 1690 1430 — 1755 1490 — 1815 mV VIH Input HIGH Voltage (Single-Ended) 2090 — 2415 2155 — 2480 2215 — 2540 mV VOL Output LOW Voltage 1365 1490 1615 1430 1555 1680 1490 1615 1740 mV 50Ω to VCC–2V VOH Output HIGH Voltage 2165 2290 2415 2230 2355 2480 2290 2415 2540 mV 50Ω to VCC–2V 1.2 — VCC 1.2 — VCC 1.2 — VCC VIHCMR Voltage(2) Input HIGH Common Mode Range Condition V NOTES: 1. 10KEP circuits are designed to meet the DC specifications shown in the above table after thermal equilibrium has been established. The circuit is in a test socket or mounted on a printed circuit board and traverse airflow greater than 500lfpm is maintained. Input and output parameters are at VCC = 3.3V. They vary 1:1 with VCC. 2. The VIHCMR range is referenced to the most positive side of the differential input signal. Single-ended input CLK pin operation is limited to VCC ≥ 3.0V in PECL mode. (10KEP) PECL DC ELECTRICAL CHARACTERISTICS(1) VCC = 5.0V ±10%, VEE = 0V TA = –40°C Symbol TA = +25°C TA = +85°C Parameter Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit Condition VIL Input LOW Voltage (Single-Ended) 3065 — 3390 3130 — 3455 3190 — 3515 mV VIH Input HIGH Voltage (Single-Ended) 3790 — 4115 3855 — 4180 3915 — 4240 mV VOL Outuput LOW Voltage 3065 3190 3315 3130 3255 3380 3190 3315 3440 mV 50Ω to VCC–2V VOH Output HIGH Voltage 3865 3990 4115 3930 4055 4180 3990 4115 4240 mV 50Ω to VCC–2V VIHCMR Input HIGH Voltage(2) Common Mode Range 1.2 — VCC 1.2 — VCC 1.2 — VCC V NOTES: 1. 10KEP circuits are designed to meet the DC specifications shown in the above table after thermal equilibrium has been established. The circuit is in a test socket or mounted on a printed circuit board and traverse airflow greater than 500lfpm is maintained. Input and output parameters are at VCC = 5.0V. They vary 1:1 with VCC. 2. The VIHCMR range is referenced to the most positive side of the differential input signal. Single-ended input CLK pin operation is limited to VCC ≥ 3.0V in PECL mode. 3 SY10EP11U SY100EP11U Micrel (10KEP) ECL/LVECL DC ELECTRICAL CHARACTERISTICS(1) VCC = 0V, VEE = –5.5V to –2.375V TA = –40°C Symbol Parameter Min. Typ. TA = +25°C Max. Min. Typ. TA = +85°C Max. Min. Typ. Max. Unit Condition VIL Input LOW Voltage (Single-Ended) –1935 — –1610 –1870 — –1545 –1810 — –1485 mV VIH Input HIGH Voltage (Single-Ended) –1210 — –885 — –820 — –760 mV VOL Outuput LOW Voltage –1935 –1810 –1685 –1870 –1745 –1620 –1810 –1685 –1560 mV 50Ω to VCC–2V VOH Output HIGH Voltage –1135 –1010 –885 mV 50Ω to VCC–2V VEE +1.2 0.0 VIHCMR Voltage(2) Input HIGH Common Mode Range –1145 –1070 –945 –820 VEE +1.2 0.0 –1085 –1010 –885 VEE +1.2 –760 0.0 V NOTES: 1. 10KEP circuits are designed to meet the DC specifications shown in the above table after thermal equilibrium has been established. The circuit is in a test socket or mounted on a printed circuit board and traverse airflow greater than 500lfpm is maintained. 2. The VIHCMR range is referenced to the most positive side of the differential input signal. Single-ended input CLK pin operation is limited to VEE ≤ –3.0V in ECL/LVECL mode. (100KEP) LVPECL DC ELECTRICAL CHARACTERISTICS(1) VCC = 2.5V ±5% TA = –40°C Symbol Parameter TA = +25°C TA = +85°C Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit Condition VOL Outuput LOW Voltage 555 680 805 555 680 805 555 680 805 mV 50Ω to VCC–2V VOH Output HIGH Voltage 1355 1480 1605 1355 1480 1605 1355 1480 1605 mV 50Ω to VCC–2V VIHCMR Input HIGH Voltage(2) Common Mode Range 1.2 — VCC 1.2 — VCC 1.2 — VCC V NOTES: 1. 100KEP circuits are designed to meet the DC specifications shown in the above table after thermal equilibrium has been established. The circuit is in a test socket or mounted on a printed circuit board and traverse airflow greater than 500lfpm is maintained. Input and output parameters are at VCC = 2.5V. They vary 1:1 with VCC. 2. The VIHCMR range is referenced to the most positive side of the differential input signal. Single-ended input CLK pin operation is limited to VCC ≥ 3.0V in PECL mode. (100KEP) LVPECL DC ELECTRICAL CHARACTERISTICS(1) VCC = 3.3V ±10%, VEE = 0V TA = –40°C Symbol TA = +25°C TA = +85°C Parameter Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit VIL Input LOW Voltage (Single-Ended) 1355 — 1675 1355 — 1675 1355 — 1675 mV VIH Input HIGH Voltage (Single-Ended) 2075 — 2420 2075 — 2420 2075 — 2420 mV VOL Output LOW Voltage 1355 1480 1605 1355 1480 1605 1355 1480 1605 mV 50Ω to VCC–2V VOH Output HIGH Voltage 2155 2280 2405 2155 2280 2405 2155 2280 2405 mV 50Ω to VCC–2V 1.2 — VCC 1.2 — VCC 1.2 — VCC VIHCMR Voltage(2) Input HIGH Common Mode Range Condition V NOTES: 1. 100KEP circuits are designed to meet the DC specifications shown in the above table after thermal equilibrium has been established. The circuit is in a test socket or mounted on a printed circuit board and traverse airflow greater than 500lfpm is maintained. Input and output parameters are at VCC = 3.3V. They vary 1:1 with VCC. 2. The VIHCMR range is referenced to the most positive side of the differential input signal. Single-ended input CLK pin operation is limited to VCC ≥ 3.0V in PECL mode. 4 SY10EP11U SY100EP11U Micrel (100KEP) PECL DC ELECTRICAL CHARACTERISTICS(1) VCC = 5.0V ±10%, VEE = 0V TA = –40°C Symbol TA = +25°C TA = +85°C Parameter Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit VIL Input LOW Voltage (Single-Ended) 3055 — 3375 3055 — 3375 3055 — 3375 mV VIH Input HIGH Voltage (Single-Ended) 3775 — 4120 3775 — 4120 3775 — 4120 mV VOL Outuput LOW Voltage 3055 3180 3305 3055 3180 3305 3055 3180 3305 mV 50Ω to VCC–2V VOH Output HIGH Voltage 3855 3980 4105 3855 3980 4105 3855 3980 4105 mV 50Ω to VCC–2V 2.0 — VCC 2.0 — VCC 2.0 — VCC VIHCMR Voltage(2) Input HIGH Common Mode Range Condition V NOTES: 1. 100KEP circuits are designed to meet the DC specifications shown in the above table after thermal equilibrium has been established. The circuit is in a test socket or mounted on a printed circuit board and traverse airflow greater than 500lfpm is maintained. Input and output parameters are at VCC = 5.0V. They vary 1:1 with VCC. 2. The VIHCMR range is referenced to the most positive side of the differential input signal. Single-ended input CLK pin operation is limited to VCC ≥ 3.0V in PECL mode. (100KEP) ECL/LVECL DC ELECTRICAL CHARACTERISTICS(1) VCC = 0V, VEE = –5.5V to –2.375V TA = –40°C Symbol Parameter Min. Typ. TA = +25°C Max. Min. Typ. TA = +85°C Max. Min. Typ. Max. Unit mV Condition VIL Input LOW Voltage –1525 –1425 –1325 –1525 –1425 –1325 –1525 –1425 –1325 VIH Input HIGH Voltage –1225 VOL Outuput LOW Voltage –1945 –1820 –1695 –1945 –1820 –1695 –1945 –1820 –1695 mV 50Ω to VCC–2V VOH Output HIGH Voltage –1145 –1020 –895 –1145 –1020 –895 –1145 –1020 –895 mV 50Ω to VCC–2V VIHCMR Input HIGH Voltage(2) Common Mode Range VEE +1.2 0.0 VEE +1.2 0.0 VEE +1.2 0.0 — –880 –1225 — –880 –1225 — –880 mV V NOTES: 1. 100KEP circuits are designed to meet the DC specifications shown in the above table after thermal equilibrium has been established. The circuit is in a test socket or mounted on a printed circuit board and traverse airflow greater than 500lfpm is maintained. 2. The VIHCMR range is referenced to the most positive side of the differential input signal. Single-ended input CLK pin operation is limited to VEE ≤ 3.0V in ECL/LVECL mode. 5 SY10EP11U SY100EP11U Micrel AC ELECTRICAL CHARACTERISTICS VCC = 0V; VEE = –5.5V to –2.375V or VCC = 2.375V to 5.5V, VEE = 0V TA = –40°C Symbol Parameter Frequency(1) TA = +25°C TA = +85°C Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit fMAX Max. Toggle 3 — — 3 — — 3 — — GHz tPLH tPHL Propagation Delay (Differential) D to Q, /Q D to Q, /Q 140 170 200 230 250 300 160 180 220 240 270 310 180 210 240 270 300 360 ps ps tSKEW Within-Device Skew(2) Q, /Q — 5 20 — 5 20 — 5 20 ps — — — — 130 110 — — — — 130 110 — — — — 150 120 ps ps — 0.2 <1 — 0.2 <1 — 0.2 <1 ps rms Part-to-Part Skew(2) tJITTER Cycle-to-Cycle Jitter (rms) VPP Minimum Input Swing(3) 150 800 1200 150 800 1200 150 800 1200 mV tr, tf Output Rise/Fall Time (20% to 80%) 70 110 170 80 120 180 100 140 200 ps Condition VCC = 3.3V/5V VCC = 2.5V VCC = 3.3V/5V VCC = 2.5V NOTES: 1. Measured with 750mV input signal, 50% duty cycle. All loading with a 50Ω to VCC –2.0V. 2. Skew is measured between outputs under identical transitions. Duty cycle skew is defined only for differential operation when the delays are measured from the cross point of the inputs to the cross point of the outputs. 3. See “Timing Waveform.” TIMING WAVEFORM Q(0:1) 150mV to 1200mV /Q(0:1) 6 SY10EP11U SY100EP11U Micrel TERMINATION RECOMMENDATIONS +3.3V +3.3V ZO = 50Ω R1 130Ω R1 130Ω +3.3V R2 82Ω R2 82Ω Vt = VCC –2V ZO = 50Ω Figure 1. Parallel Termination–Thevenin Equivalent Notes: 1. For +2.5V systems: R1 = 250Ω R2 = 62.5Ω 2. For +5.0V systems: R1 = 82Ω R2 = 130Ω +5.0V or +3.3V +5.0V or +3.3V Z = 50Ω Z = 50Ω 50Ω 50Ω “source” “destination” 50Ω Rb Figure 2. Three-Resistor “Y–Termination” Notes: 1. Power-saving alternative to Thevenin termination. 2. Place termination resistors as close to destination inputs as possible. 3. Rb resistor sets the DC bias voltage equal to Vt. For +3.3V systems Rb = 46Ω to 50Ω. For +5V systems, Rb = 110Ω. PRODUCT ORDERING CODE Ordering Code Package Type Operating Range Package Marking SY10EP11UKI K8-1 Industrial HP11 SY10EP11UKITR* K8-1 Industrial HP11 SY10EP11UZI Z8-1 Industrial SY10EP11UZITR* Z8-1 Industrial Ordering Code Package Type Operating Range Package Marking SY100EP11UKI K8-1 Industrial XP11 SY100EP11UKITR* K8-1 Industrial XP11 HEP11U SY100EP11UZI Z8-1 Industrial XEP11U HEP11U SY100EP11UZITR* Z8-1 Industrial XEP11U *Tape and Reel 7 SY10EP11U SY100EP11U Micrel 8 LEAD MSOP (K8-1) Rev. 01 8 SY10EP11U SY100EP11U Micrel 8 LEAD SOIC .150" WIDE (Z8-1) Rev. 03 MICREL-SYNERGY TEL 3250 SCOTT BOULEVARD + 1 (408) 980-9191 FAX SANTA CLARA + 1 (408) 914-7878 WEB CA 95054 USA 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. © 2001 Micrel Incorporated 9