Micrel, Inc. 2.5V/3.3V/5V 1:5 LVPECL/PECL/ ECL/HSTL 2GHz CLOCK DRIVER WITH 2:1 DIFFERENTIAL INPUT MUX Precision Edge® SY100EP14U Precision Edge® SY100EP14U FEATURES • • • • • • • • • Guaranteed AC parameters over temp/voltage: • > 2GHz fMAX • < 25ps within-device skew • < 275ps tr/tf time • < 525ps prop delay 2:1 Differential MUX input Flexible supply voltage: 2.5V/3.3V/5V Wide operating temperature range: –40° C to +85° C VBB reference for single-ended or AC-coupled PECL inputs 100K ECL compatible outputs Inputs accept PECL/LVPECL/ECL/HSTL logic 75kΩ Ω internal input pull-down resistors Available in a 20-Pin TSSOP package ECL Pro™ DESCRIPTION The SY100EP14U is a high-speed, 2GHz differential PECL/ECL 1:5 fanout buffer optimized for ultra-low skew applications. Within device skew is guaranteed to be less than 25ps over temperature and supply voltage. The wide supply voltage operation allows this fanout buffer to operate in 2.5V, 3.3V, and 5V systems. A VBB reference is included for single-supply or AC-coupled PECL/ECL input applications, thus eliminating resistor networks. When interfacing to a single-ended or AC-coupled PECL/ECL input signal, connect the VBB pin to the unused /CLK pin, and bypass the pin to VCC through a 0.01µF capacitor. The SY100EP14U features a 2:1 input MUX, making it an ideal solution for redundant clock switchover applications. If only one input pair is used, the other pair may be left floating. In addition, this device includes a synchronous enable pin that forces the outputs into a fixed logic state. Enable or disable state is initiated only after the outputs are in a LOW state, thus eliminating the possibility of a “runt” clock pulse. The SY100EP14U I/O are fully differential and 100K ECL compatible. Differential 10K ECL logic can interface directly into the SY100EP14U inputs. The SY100EP14U is part of Micrel’s high-speed clock synchronization family. For applications that require a different I/O combination, consult the Micrel website at www.micrel.com, and choose from a comprehensive product line of high-speed, low-skew fanout buffers, translators, and clock generators. ECL Pro is a trademarks of Micrel, Inc. Precision Edge is a registered trademarks of Micrel, Inc. M9999-060910 [email protected] or (408) 955-1690 1 Rev.: G Amendment: /0 Issue Date: May 2010 Precision Edge® SY100EP14U Micrel, Inc. PACKAGE/ORDERING INFORMATION VCC /EN VCC 20 19 18 /CLK1 17 D Q CLK1 16 VBB CLK0 /CLK0 SEL VEE 15 1 14 13 12 11 0 1 2 3 4 5 6 7 8 9 10 Q0 /Q0 Q1 /Q1 Q2 /Q2 Q3 /Q3 Q4 /Q4 20-Pin TSSOP Ordering Information(1) Part Number Package Type Operating Range Package Marking SY100EP14UK4C K4-20-1 Commercial XEP14U SY100EP14UK4CTR(2) K4-20-1 Commercial XEP14U SY100EP14UK4I K4-20-1 Industrial XEP14U SY100EP14UK4ITR(2) K4-20-1 Industrial XEP14U SY100EP14UK4G(3) K4-20-1 Industrial XEP14U with Pb-Free bar line indicator SY100EP14UK4GTR(2, 3) K4-20-1 Industrial XEP14U with Pb-Free bar line indicator Notes: 1. 2. 3. M9999-060910 [email protected] or (408) 955-1690 Contact factory for die availability. Dice are guaranteed at TA = 25°C, DC Electricals only. Tape and Reel. Pb-Free package is recommended for new designs. 2 Precision Edge® SY100EP14U Micrel, Inc. PIN DESCRIPTION Pin Function CLK0, /CLK0 CLK1, /CLK1 PECL, LVPECL, ECL, LVECL, HSTL Clock or Data Inputs. Internal 75kΩ pull-down resistors on CLK0, CLK1, and internal 75kΩ pull-up and 75kΩ pull-down resistors or /CLK0, /CLK1. For single-ended applications, connect signal into CLK0 and/or CLK1 inputs. /CLK0, /CLK1 default condition is VCC/2 when left floating. CLK0, CLK1 default condition is LOW when left floating. Q0 to Q4 /Q0 to /Q4 LVPECL, PECL, ECL Differential Outputs: Terminate with 50Ω to VCC–2V. For single-ended applications, terminate the unused output with 50Ω to VCC–2V /EN LVPECL, PECL, ECL compatible synchronous enable: When /EN goes HIGH, the QOUT will go LOW and /QOUT will go HIGH on the next LOW input clock transition. Includes a 75kΩ pull-down. Default state is LOW when left floating. The internal latch is clocked on the falling edge of the input clock (CLK0, CLK1) SEL LVPECL, PECL, ECL compatible 2:1 Mux input signal select: When SEL is LOW, CLK0 input pair is selected. When SEL is HIGH, CLK1 input pair is selected. Includes a 75kΩ pull-down. Default state is LOW and CLK0 is selected. VBB Output Reference Voltage: Equal to VCC–1.7V (approx.), and used for single-ended input signals or AC-coupled applications. For single-ended PECL, LVPECL applications, bypass with a 0.01µF to VCC. For single-ended LVTTL inputs, bypass to GND. Max. sink/source current is 0.5mA. VCC Positive Power Supply: Bypass with 0.1µF//0.01µF low ESR capacitors. VEE Negative Power Supply: LVPECL, PECL applications, connect to GND. TRUTH TABLE(1) FUNCTION TABLE CLK0 CLK1 CLK_SEL /EN Q CLK_SEL Active Input L X L L L 0 CLK0, /CLK0 H X L L H 1 CLK1, /CLK1 X L H L L X H H L H X X X H L* Note 1. On next negative transition of CLK0 or CLK1. M9999-060910 [email protected] or (408) 955-1690 3 Precision Edge® SY100EP14U Micrel, Inc. ABSOLUTE MAXIMUM RATINGS(1) Symbol Rating Value Unit 6.0 V –6.0 to 0 +6.0 to 0 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 IBB VBB Sink/Source Current(2) ±0.5 mA TLEAD Lead Temperature (soldering, 20sec.) +260 °C TA Operating Temperature Range –40 to +85 °C Tstore Storage Temperature Range –65 to +150 °C ESD Mil Std. 883 Human Body Model, All Pins >1.5k V θJA Package Thermal Resistance (Junction-to-Ambient) 115 75 65 °C/W θJC Package Thermal Resistance (Junction-to-Case) 21 °C/W –Continuous –Surge –Still-Air (single-layer PCB) –Still-Air (multi-layer PCB) –500lfpm (multi-layer PCB) 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. Note 2. Due to the limited drive capability, use for inputs of same package only. DC ELECTRICAL CHARACTERISTICS(1) TA = –40° C Symbol TA = +25° C TA = +85° C Parameter Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. VCC Power Supply Voltage (PECL) (LVPECL) (ECL) (LVECL) 4.5 2.37 –4.5 –3.8 5.0 3.3 –5.0 –3.3 5.5 3.8 –5.5 –2.37 4.5 2.37 –4.5 –3.8 5.0 3.3 –5.0 –3.3 5.5 3.8 –5.5 –2.37 4.5 2.37 –4.5 –3.8 5.0 3.3 –5.0 –3.3 5.5 3.8 –5.5 –2.37 ICC Power Supply Current — — 75 — 68 78 — — 82 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 (TSSOP) — — — — 0.75 — — — — pF Note 1. D /D Unit Condition V 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. M9999-060910 [email protected] or (408) 955-1690 4 Precision Edge® SY100EP14U Micrel, Inc. (100KEP) LVPECL DC ELECTRICAL CHARACTERISTICS(1) VCC = 2.5V ±5%, VEE = 0V TA = –40° C Symbol TA = +85° C Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit VIL Voltage(2) Input LOW (Single-ended) 555 — 875 555 — 875 555 — 875 mV VIH Input HIGH Voltage(2) (Single-ended) 1335 — 1620 1335 — 1620 1335 — 1620 mV VOL Output LOW Voltage 555 680 805 555 680 805 555 680 805 mV VOH Output HIGH Voltage 1355 1480 1605 1355 1480 1605 1355 1480 1605 mV 50Ω to VCC–2V VIHCMR Input HIGH Voltage Common Mode Range(3) 1.2 — VCC 1.2 — VCC 1.2 — VCC Note 1. Note 2. Note 3. Parameter TA = +25° C Condition 50Ω to VCC–2V V 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 varies 1:1 with VCC. VBB reference is not functional for VCC < 3.0V. External VBB equivalent is required. VIHCMR (min) varies 1:1 with VEE, VIHCMR (Max) varies 1:1 with VCC. The VIHCMR range is referenced to the most positive side of the differential input signal. (100KEP) LVPECL DC ELECTRICAL CHARACTERISTICS(1) VCC = 3.3V ±10%; VEE = 0V TA = –40° C Symbol Parameter TA = +25° C TA = +85° C Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit Condition 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 VBB Reference Voltage(2) 1775 1875 1975 1775 1875 1975 1775 1875 1975 mV VCC = 3.3V VIHCMR Input HIGH Voltage Common Mode Range(3) 1.2 — VCC 1.2 — VCC 1.2 — VCC V Note 1. Note 2. Note 3. 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 varies 1:1 with VCC. Single-ended input operation is limited VCC ≥ 3.0V in LVPECL mode. VBB reference varies 1:1 with VCC. VIHCMR (min) varies 1:1 with VEE, VIHCMR (Max) varies 1:1 with VCC. The VIHCMR range is referenced to the most positive side of the differential input signal. M9999-060910 [email protected] or (408) 955-1690 5 Precision Edge® SY100EP14U Micrel, Inc. (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 Output 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 VBB Output Voltage Reference(2) 3475 3575 3675 3475 3575 3675 3475 3575 3675 mV VCC = +5.0V VIHCMR Input HIGH Voltage(3) Common Mode Range 2.0 — VCC 2.0 — VCC 2.0 — VCC Note 1. Note 2. Note 3. Condition V 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. VBB reference varies 1:1 with VCC. 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) LVECL DC ELECTRICAL CHARACTERISTICS(1) VEE = –2.37V to –3.8V; VCC = 0V TA = –40° C Symbol Parameter TA = +25° C Min. Typ. Typ. Max. Unit VIL Input LOW Voltage (Single-ended) –1945 — –1625 –1945 — –1625 –1945 — –1625 mV VIH Input HIGH Voltage (Single-ended) –1165 — –880 — –880 — –880 mV VOL Output LOW Voltage –1945 –1820 –1695 –1945 –1820 –1695 –1945 –1820 –1695 mV 50Ω to VCC–2V VOH Output HIGH Voltage –1145 –1020 –0895 –1145 –1020 –0895 –1145 –1020 –0895 mV 50Ω to VCC–2V –1525 –1425 –1325 –1525 –1425 –1325 –1525 –1425 –1325 mV Voltage(2) VBB Output Reference VIHCMR Input HIGH Voltage Common Mode Range(3) Note 1. Note 2. Note 3. VEE +1.2 Max. Min. –1165 0.0 Typ. TA = +85° C VEE +1.2 Max. 0.0 Min. –1165 VEE +1.2 0.0 Condition V 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 vary 1:1 with VCC. Single-ended input operation is limited VEE ≤ –3.0V in ECL/LVECL mode. VBB reference varies 1:1 with VCC. VIHCMR (min) varies 1:1 with VEE, VIHCMR (max) varies 1:1 with VCC. The VIHCMR range is referenced to the most positive side of the differential input signal. M9999-060910 [email protected] or (408) 955-1690 6 Precision Edge® SY100EP14U Micrel, Inc. (100K) ECL/LVECL DC ELECTRICAL CHARACTERISTICS(1) VCC = 0V, VEE = –5.5V to –3.0V 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 –1945 — –1625 –1945 — –1625 –1945 — –1625 mV VIH Input HIGH Voltage –1225 — –880 — –880 — –880 mV VOL Output LOW Voltage(2) –1945 –1820 –1695 –1945 –1820 –1695 –1945 –1820 –1695 mV 50Ω to VCC–2V VOH Output HIGH Voltage(2) –1145 –1020 –895 mV 50Ω to VCC–2V VBB Output Reference Voltage(3) –1525 –1425 –1325 –1525 –1425 –1325 –1525 –1425 –1325 mV VIHCMR Input HIGH Voltage Common Mode Range(4) Note 1. Note 2. Note 3. Note 4. –895 VEE +1.2 –1225 –1145 –1020 0.0 VEE +1.2 –895 –1225 –1145 –1020 0.0 VEE +1.2 0.0 V 10EP 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 vary 1:1 with VCC. All loading with 50Ω to VCC –2.0V. Single-ended input operation is limited VEE ≤–3.0V in ECL/LVECL mode. VBB reference varies 1:1 with VCC. VIHCMR (min) varies 1:1 with VEE, (max) varies 1:1 with VCC. The VIHCMR is referenced to the most positive side of the differential input signal. HSTL INPUT DC ELECTRICAL CHARACTERISTICS VCC = 2.37V to 3.8V; VEE = 0V TA = –40° C Symbol Parameter VIH Input HIGH Voltage VIL Input LOW Voltage VX Input Crossover Voltage M9999-060910 [email protected] or (408) 955-1690 TA = +25° C TA = +85° C Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit 1200 — — 1200 — — 1200 — — mV — — 400 — — 400 — — 400 mV 680 — 900 680 — 900 680 — 900 mV 7 Precision Edge® SY100EP14U Micrel, Inc. AC ELECTRICAL CHARACTERISTICS LVPECL: VCC = 2.37V to 2.625V, VEE = 0V; PECL: VCC = 4.50V to 5.50V, VEE = 0V; ECL: VEE = –4.50V to –5.5V, VCC = 0V; LVECL:VEE = –2.37V to –3.8V, VCC = 0V TA = –40° C Symbol Parameter TA = +25° C TA = +85° C Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit 2 — — 2 — — 2 — — GHz fMAX Maximum Frequency(1) tPLH tPHL PECL/ECL (VCC = 5V) PropagationDelay to Output IN (Differential) IN (Single-Ended) 250 — 330 — 400 — 250 — 330 355 450 — 250 — 330 — 600 — ps ps LVPECL/LVECL (VCC = 2.37V to 3.8V) Propagation Delay to Output IN (Differential) IN (Single-Ended) 275 — 350 — 425 — 275 — 350 375 475 — 275 — 350 — 525 — ps ps PECL/ECL (VCC = 5V) Within-Device Skew (Diff.) Part-to-Part Skew (Diff.) — — 25 100 35 125 — — 30 150 45 175 — — 40 175 50 200 ps ps LVPECL/LVECL (VCC = 2.37V to 3.8V) Within-Device Skew (Diff.) Part-to-Part Skew (Diff.) — — 10 100 25 125 — — 15 150 25 175 — — 15 200 25 225 ps ps /EN to CLK 100 50 — 100 50 — 100 50 — ps /EN to CLK 200 140 — 200 140 — 200 140 — ps tSKEW(2) tS Set-Up Time(3) Time(3) tH Hold VPP Minimum Input Swing 150 800 1200 150 800 1200 150 800 1200 mV t r, t f PECL/ECL Output Rise/Fall Times (20% to 80%) LVPECL/LVECL (VCC = 2.37V to 3.8V) 100 90 180 130 240 225 105 95 180 130 270 250 110 100 225 150 300 275 ps ps Note 1. Note 2. Note 3. fMAX is defined as the maximum toggle frequency. Measured with 750mV input signal, 50% duty cycle, all loading with 50W to VCC–2V. Skew is measured between outputs under identical transitions. Set-up and hold times apply to synchronous applications that intend to enable/disable before then ext clock cycle. For asynchronous applications, set-up and hold time does not apply. M9999-060910 [email protected] or (408) 955-1690 8 Precision Edge® SY100EP14U Micrel, Inc. 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 Note 1. For +2.5V systems: R1 = 250Ω, R2 = 62.5Ω Note 2. For +5.0V systems: R1 = 82Ω, R2 = 130Ω +3.3V +3.3V Z = 50Ω Z = 50Ω 50Ω “source” 50 Ω “destination” 50Ω Rb Figure 2. Three-Resistor “Y–Termination” Note 1. Power-saving alternative to Thevenin termination. Note 2. Place termination resistors as close to destination inputs as possible. Note 3. Rb resistor sets the DC bias voltage, equal to Vt. For +3.3V systems Rb = 46Ω to 50Ω. For +5V systems, Rb = 110Ω. +3.3V +3.3V +3.3V R1 130Ω Q R1 130Ω ZO = 50Ω /Q +3.3V 50Ω VBB Vt = VCC –2V R2 82Ω R2 82Ω 0.01µF +3.3V Figure 3. Terminating Unused I/O Note 1. Unused output (/Q) must be terminated to balance the output. Note 2. Micrel's differential I/O logic devices include a VBB reference pin . Note 3. Note 4. Connect unused input through 50Ω to VBB. Bypass with a 0.01µF capacitor to VCC, not GND. For +2.5V systems: R1 = 250Ω, R2 = 62.5Ω. M9999-060910 [email protected] or (408) 955-1690 9 Precision Edge® SY100EP14U Micrel, Inc. 20-PIN TSSOP (K4-20-1) ± .05 ± 0.002 ± .10 ± .004 + .10 – .00 + .004 – .000 ± .10 ± .004 + .10 – .00 + .004 – .000 Rev. 01 Package Notes: Note 1. Package meets Level 1 moisture sensitivity. MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA TEL + 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. © 2005 Micrel, Incorporated. M9999-060910 [email protected] or (408) 955-1690 10