ULTRA PRECISION 8:1 MUX

Micrel ULTRA PRECISION 8:1 MUX WITH INTERNAL TERMINATION AND 1:2 CML FANOUT BUFFER Precision Edge™ SY58037U Precision Edge™ SY58037U FEATURES s Selects between 1 of 8 inputs, and provides two precision, low skew CML output copies Precision Edge™ s Guaranteed AC performance over temperature and DESCRIPTION voltage: • DC to 5Gbps throughput The SY58037U is a low jitter, low skew, high-speed 8:1 • <450ps propagation delay IN-to-Q (VIN ≥ 300mV) multiplexer with a 1:2 differential fanout buffer optimized for • <70ps tr / tf time precision telecom and enterprise server distribution • <15ps skew (output-to-output) applications. The SY58037U distributes clock frequencies s Unique, patent-pending, channel-to-channel from DC to 4GHz and data rates to 5Gpbs guaranteed over isolation design provides superior crosstalk temperature and voltage. performance The SY58037U differential input includes Micrel’s unique, s Ultra-low jitter design: 3-pin input termination architecture that directly interfaces • <1psrms random jitter to any differential signal (AC- or DC-coupled) as small as • <10pspp deterministic jitter 100mV (200mVpp) without any level shifting or termination • <10pspp total jitter (clock) resistor networks in the signal path. The outputs are 50Ω • <0.7psrms crosstalk-induced jitter source-terminated CML with extremely fast rise/fall time s Unique, patent-pending, input termination and VT guaranteed to be less than 70ps. pin accepts DC- and AC-coupled inputs (CML, PECL, The SY58037U features a patent-pending isolation design LVDS) that significantly improves channel-to-channel crosstalk s 400mV CML output swing performance. www.DataSheet4U.com s 50Ω source terminated outputs minimize round-trip The SY58037U operates from a 2.5V ±5% or 3.3V ±10% reflections supply and is guaranteed over the full industrial temperature range of –40°C to +85°C. The SY58037U is part of Micrel’s s Power supply 2.5V ±5% or 3.3V ±10% high-speed, Precision Edge™ product line. s –40°C to +85°C temperature range Data sheets and support documentation can be found on s Available in 44-pin (7mm × 7mm) MLF™ package Micrel’s web site at www.micrel.com. APPLICATIONS s s s s Data communication systems All SONET/SDH data/clock applications All Fibre Channel applications All Gigabit Ethernet applications Precision Edge is a trademark of Micrel, Inc. MLF and MicroLeadFrame are trademarks of Amkor Technology, Inc. M9999-070804 hbwhelp@micrel.com or (408) 955-1690 Rev.: A Amendment: /0 1 Issue Date: July 2004 Micrel Precision Edge™ SY58037U FUNCTIONAL BLOCK DIAGRAM IN0 50Ω VT0 50Ω /IN0 VREF-AC0 IN1 50Ω VT1 50Ω /IN1 IN2 50Ω VT2 50Ω 8:1 MUX 0 1 1:2 Fanout /IN2 VREF-AC1 IN3 50Ω VT3 50Ω 2 3 4 MUX Q0 /Q0 Q1 /Q1 S2 S1 S0 /IN3 IN4 50Ω VT4 50Ω 5 6 7 /IN4 VREF-AC2 IN5 50Ω VT5 50Ω /IN5 IN6 50Ω VT6 50Ω /IN6 VREF-AC3 IN7 50Ω VT7 50Ω /IN7 SEL0 (CMOS/TTL) SEL1 (CMOS/TTL) SEL3 (CMOS/TTL) TRUTH TABLE SEL2 L L L L H H H H SEL1 L L H H L L H H SEL0 L H L H L H L H Q IN0 IN1 IN2 IN3 IN4 IN5 IN6 IN7 /Q /IN0 /IN1 /IN2 /IN3 /IN4 /IN5 /IN6 /IN7 M9999-070804 hbwhelp@micrel.com or (408) 955-1690 2 Micrel Precision Edge™ SY58037U PACKAGE/ORDERING INFORMATION VT5 /IN5 IN6 VT6 /IN6 VREF-AC3 IN7 VT7 /IN7 SEL2 NC Ordering Information(1) Part Number GND VCC /Q1 Q1 VCC GND VCC /Q0 Q0 VCC GND Package Type MLF-44 MLF-44 MLF-44 Operating Range Industrial Industrial Industrial Package Marking SY58037U SY58037U Lead Finish Tn-Pb Tn-Pb IN5 VREF-AC2 /IN4 VT4 IN4 NC /IN3 VT3 IN3 VREF-AC1 /IN2 44 43 42 41 40 39 38 37 36 35 34 1 33 2 32 3 31 4 30 5 29 6 28 7 27 8 26 9 25 24 10 23 11 12 13 14 15 16 17 18 19 20 21 22 VT2 IN2 /IN1 VT1 IN1 VREF-AC0 /IN0 VT0 IN0 SEL0 SEL1 SY58037UMI SY58037UMITR(2) SY58037UMI SY58037U Pb-Free and white dot or bar SY58037U Pb-Free and white dot or bar SY58037UMITR(2) MLF-44 Industrial Notes: 1. Contact factory for die availability. Dice are guaranteed at TA = 25°C, DC electricals only. 2. Tape and Reel. 44-Pin MLF™ (MLF-44) PIN DESCRIPTION Pin Number 20, 18, 16, 14, 13, 11, 9, 7, 5, 3, 1, 43, 42, 40, 38, 36 19,15, 12, 8, 4, 44, 41, 37 17, 10, 2 39 21, 22, 35 24, 27, 29, 32 25, 26, 30, 31 23, 28, 33 Pin Name IN0, /IN0, IN1, /IN1, IN2, /IN2, IN3, /IN3, IN4, /IN4, IN5,/IN5, IN6, /IN6, IN7, /IN7 VT0, VT1 VT2, VT3, VT4, VT5, VT6, VT7 VREF-AC0, VREF-AC1, VREF-AC2, VREF-AC3 SEL0, SEL1, SEL2 VCC Q0,/Q0, Q1,/Q1 GND, Exposed Pad Pin Function Differential Inputs: These input pairs are the differential signal inputs to the device. Inputs accept AC or DC-coupled signals as small as 100mV. Each pin of a pair internally terminates to a VT pin through 50Ω. Note that these inputs will default to an indeterminate state if left open. Please refer to the “Input Interface Applications” section for more details. Input Termination Center-Tap: Each side of the differential input pair terminates to a VT pin. The VT pins provide a center-tap to a termination network for maximum interface flexibility. See “Input Interface Applications” section for more details. Reference Voltage: This output biases to VCC–1.2V. It is used when AC coupling the inputs (IN, /IN). For AC-coupled applications, connect VREF_AC to the VT pin and bypass with a 0.01µF low ESR capacitor to VCC. See “Input Interface Applications” section for more details. The TTL/CMOS-compatible inputs select the inputs to the multiplexer. Note that this input is internally connected to a 25kΩ pull-up resistor and will default to a logic HIGH state if left open. Positive Power Supply. Bypass with 0.1µF0.01µF low ESR capacitors as close to each VCC pin. Differential Outputs: These CML output pairs are the outputs of the device. Please refer to the truth table below for details. Unused output pairs may be left open. Each output is designed to drive 400mV into 100Ω across each output pair. Ground. GND and exposed pad must both be connected to the most negative potential of chip ground. 3 Micrel Precision Edge™ SY58037U Absolute Maximum Ratings(1) Power Supply Voltage (VCC ) ...................... –0.5V to +4.0V Input Voltage (VIN) ......................................... –0.5V to VCC LVPECL Output Current (IOUT) Continuous ............................................................. 50mA Surge .................................................................... 100mA Termination Current(3) Source or sink current on VT pin ........................ ±100mA Lead Temperature (soldering, 10 sec.) ..................... 265°C Storage Temperature Range (TS ) ........... –65°C to +150°C Operating Ratings(2) Power Supply Voltage (VCC) ............... +2.375V to +2.625V ............................................................ +3.0V to +3.6V Ambient Temperature Range (TA) ............. –40°C to +85°C Package Thermal Resistance(4) MLF™ (θJA) Still-Air ............................................................. 24°C/W MLF™ (ψJB) Junction-to-board ............................................ 12°C/W DC ELECTRICAL CHARACTERISTICS(5) TA= –40°C to +85°C, unless otherwise stated. Symbol VCC ICC RIN RDIFF_IN VIH VIL VIN VDIFF_IN VT_IN VREF-AC Notes: 1. Permanent device damage may occur if ratings in the “Absolute Maximum Ratings” section are exceeded. This is a stress rating only and functional operation is not implied for conditions other than those detailed in the operational sections of this data sheet. Exposure to absolute maximum ratings conditions for extended periods may affect device reliability. 2. The data sheet limits are not guaranteed if the device is operated beyond the operating ratings. 3. Due to the limited drive capability, use for input of the same package only. 4. Package thermal resistance assumes exposed pad is soldered (or equivalent) to the device’s most negative potential on the PCB. ΨJB uses 4-layer θJA in still-air number unless otherwise stated. 5. The circuit is designed to meet the DC specifications shown in the above table after thermal equilibrium has been established. 6. VIH (min), not lower than 1.2V. Parameter Power Supply Voltage Condition VCC = 2.5V. VCC = 3.3V. No load, max. VCC. Min 2.375 3.0 Typ 2.5 3.3 145 Max 2.625 3.6 200 60 120 VCC VIH–0.1 1.7 Units V V mA Ω Ω V V V V Power Supply Current Input Resistance (IN-to-VT) Differential Input Resistance (IN-to-/IN) Input HIGH Voltage (IN-to-/IN) Input LOW Voltage (IN-to-/IN) Input Voltage Swing (IN-to-/IN) Differential Input Voltage Swing (IN-to-/IN) IN to VT (IN-to-/IN) Output Reference Voltage 40 80 Note 6 VCC–1.6 0 See Figure 1a. See Figure 1b. 0.1 0.2 50 100 1.28 VCC–1.3 VCC–1.2 VCC–1.1 V V 4 Micrel Precision Edge™ SY58037U CML OUTPUT DC ELECTRICAL CHARACTERISTICS(7) VCC = 2.5V ±5% or 3.3V ±10%; TA= –40°C to +85°C; RL = 100Ω across each output pair, unless otherwise stated. Symbol VOH VOUT VDIFF_OUT ROUT Parameter Output HIGH Voltage Q, /Q Output Differential Swing Q, /Q Differential Output Voltage Swing Q, /Q Output Source Impedance See Figure 1a. See Figure 1b. Condition Min Typ Max VCC Units V mV mV 60 Ω VCC–0.040 VCC–0.010 325 650 40 400 800 50 LVTTL/CMOS DC ELECTRICAL CHARACTERISTICS(7) VCC = 2.5V ±5% or 3.3V ±10%; TA= –40°C to +85°C, unless otherwise stated. Symbol VIH VIL IIH IIL Note: 7. The circuit is designed to meet the DC specifications shown in the above table after thermal equilibrium has been established. Parameter Input HIGH Voltage Input LOW Voltage Input HIGH Current Input LOW Current Condition Min 2.0 Typ Max VCC 0.8 30 Units V V µA µA –125 –300 5 Micrel Precision Edge™ SY58037U AC ELECTRICAL CHARACTERISTICS(8) VCC = 2.5V ±5% or 3.3V ±10%; TA= –40°C to +85°C, RL = 100Ω across each output pair or equivalent, unless otherwise stated. Symbol fMAX tpd Parameter Maximum Operating Frequency Differential Propagation Delay (IN-to-Q) (SEL-to-Q) ∆tpd Tempco tSKEW