Micrel, Inc. DUAL CML/PECL/LVPECL-to-LVDS TRANSLATOR SuperLite™ SY55855V SuperLite™ SY55855V FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ■ Guaranteed fMAX >750MHz over temperature 1.5Gbps throughput capability 3.0V to 5.7V power supply Guaranteed <700ps propagation delay over temperature Guaranteed <50ps within-device skew over temperature LVDS compatible outputs Fully differential I/O architecture Wide operating temperature range: –40°C to +85°C Available in a tiny 10-pin MSOP package SuperLite™ DESCRIPTION The SY55855V is a fully differential, CML/PECL/ LVPECL-to-LVDS translator. It achieves LVDS signaling up to 1.5Gbps, depending on the distance and the characteristics of the media and noise coupling sources. LVDS is intended to drive 50Ω impedance transmission line media such as PCB traces, backplanes, or cables. SY55855V inputs can be terminated with a single resistor between the true and the complement pins of a given input. The SY55855V is a member of Micrel’s new SuperLite™ family of high-speed logic devices. This family features very small packaging, high signal integrity, and operation at many different supply voltages. FUNCTIONAL BLOCK DIAGRAM D0 Q0 /D0 /Q0 D1 Q1 /D1 /Q1 APPLICATIONS ■ ■ ■ ■ High-speed logic Data communications systems Wireless communications systems Telecom systems SuperLite is a trademark of Micrel, Inc. M9999-110705 [email protected] or (408) 955-1690 Rev.: D 1 Amendment: /0 Issue Date: November 2005 SuperLite™ SY55855V Micrel, Inc. PACKAGE/ORDERING INFORMATION Ordering Information(1) D0 1 10 VCC /D0 2 9 Q0 D1 3 8 /Q0 /D1 4 7 Q1 GND 5 6 /Q1 Part Number Package Type Operating Range Package Marking Lead Finish SY55855VKI K10-1 Industrial 855V Sn-Pb SY55855VKITR(2) K10-1 Industrial 855V Sn-Pb SY55855VKG(3) K10-1 Industrial 855V with NiPdAu Pb-Free bar line indicator Pb-Free SY55855VKGTR(2, 3) K10-1 Industrial 855V with NiPdAu Pb-Free bar line indicator Pb-Free 10-Pin MSOP (K10-1) Notes: 1. Contact factory for die availability. Dice are guaranteed at TA = 25°C, DC Electricals only. 2. Tape and Reel. 3. Pb-Free package recommended for new designs. PIN DESCRIPTION Pin Number Pin Name Pin Function 1, 2 D0, /D0 CML/PECL/LVPECL Input (Differential). This is one of the inputs. It is converted to LVDS onto the Q0 and /Q0 outputs. 3, 4 D1, /D1 CML/PECL/LVPECL Input (Differential). This is the other input. It is converted to LVDS onto the Q1 and /Q1 outputs. 5 GND 6, 7 /Q1, Q1 LVDS Output (Differential). This is the other LVDS output. It buffers the CML input that appears at D1, /D1. 8, 9 /Q0, Q0 LVDS Output (Differential). This is one LVDS output. It buffers the CML input that appears at D0, /D0. 10 VCC Ground. VCC TRUTH TABLE D0 D1 Q0 /Q0 Q1 /Q1 0 0 0 1 0 1 0 1 0 1 1 0 1 0 1 0 0 1 1 1 1 0 1 0 M9999-110705 [email protected] or (408) 955-1690 2 SuperLite™ SY55855V Micrel, Inc. FUNCTIONAL DESCRIPTION unconnected. For VCC ≤ 3.0V, connect the complement input to VCC and leave the true input unconnected. To make an input static logic one, connect the true input to VCC, leave the complement input unconnected. These are the only two safe ways to cause inputs to be at a static value. In particular, no input pin should be directly connected to ground. All NC (no connect) pins should be unconnected. Establishing Static Logic Inputs The true pin of an input pair is internally biased to ground through a 75kΩ resistor. The complement pin of an input pair is internally biased halfway between VCC and ground by a voltage divider consisting of two 75kΩ resistors. In this way, unconnected inputs appear as logic zeros. To keep an input at static logic zero at VCC > 3.0V, leave both inputs VCC X NC X NC /X NC /X VCC > 3.0V Figure 1. Hard Wiring a Logic “1” (1) Note 1. X is either D0 or D1 input. /X is either /D0 or /D1 input. NC X VCC /X VCC ≤ 3.0V Figure 2. Hard Wiring a Logic “0” (1) Note 1. M9999-110705 [email protected] or (408) 955-1690 3 X is either D0 or D1 input. /X is either /D0 or /D1 input. SuperLite™ SY55855V Micrel, Inc. LVDS OUTPUTS LVDS stands for Low Voltage Differential Swing. LVDS specifies a small swing of 350mV typical, on a nominal 1.25V common mode above ground. The common mode voltage has tight limits to permit large variations in ground between an LVDS driver and receiver. Also, change in common mode voltage, as a function of data input, is also kept tight, to keep EMI low. 49.9Ω, ±1% 49.9Ω, ±1% 50Ω 50Ω vOD vOH, vOL vOCM, ∆vOCM GND 100Ω ±1% Figure 4. LVDS Common Mode Measurement vOH, vOL 50Ω 50Ω GND Figure 3. LVDS Differential Measurement M9999-110705 [email protected] or (408) 955-1690 100Ω Figure 5. LVDS Output Termination 4 SuperLite™ SY55855V Micrel, Inc. ABSOLUTE MAXIMUM RATINGS(1) Symbol Rating VCC Power Supply Voltage VIN Input Voltage IOUT LVDS Output Current TA Operating Temperature Range TLEAD Lead Temperature (soldering, 20sec.) Tstore Storage Temperature Range Note 1. Value Unit –0.5 to +6.0 V –0.5 to VCC +0.5 V ±10% mA –40 to +85 °C 260 °C –65 to +150 °C 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 VCC = 3.0V to 5.7V; GND = 0V; TA = –40°C to +85°C(2) TA = –40°C Symbol Parameter TA = +25°C TA = +85°C Min. Max. Min. Typ. Max. Min. Max. Unit V VCC Power Supply Voltage 3.0 5.7 3.0 — 5.7 3.0 5.7 ICC Power Supply Current 3.6V <VCC <5.7V VCC ≤3.6V — — 80 50 — — — 30 80 50 — — 80 50 mA CML DC ELECTRICAL CHARACTERISTICS VCC = 3.0V to 5.7V; GND = 0V; TA = –40°C to +85°C(2) Symbol Parameter Min. Typ. Max. Unit Condition VID Differential Input Voltage 100 — — mV VIH Input HIGH Voltage 1.6 — VCC V VIL Input LOW Voltage 1.5 — VCC – 0.1 V Min. Typ. Max. Unit Condition 250 — 450 mV 100Ω Termination 1.125 — 1.375 V LVDS DC ELECTRICAL CHARACTERISTICS VCC = 3.0V to 5.7V; GND = 0V; TA = –40°C to +85°C(2) Symbol Parameter Voltage(4) VOD Differential Output VOCM Output Common Mode Voltage(3) ∆VOCM Change in Common Mode Voltage(3) –50 — +50 mV VOH Output HIGH Voltage(4), (5) — — 1.474 V IOH = –4.0mA VOL Voltage(4), (5) 0.925 — — V IOL = 4.0mA Output LOW Note 2. Equilibrium temperature. Note 3. Measured as per Figure 4. Note 4. Measured as per Figure 3. Note 5. Do not short output to GND. M9999-110705 [email protected] or (408) 955-1690 5 SuperLite™ SY55855V Micrel, Inc. AC ELECTRICAL CHARACTERISTICS(1) VCC = 3.0V to 5.7V; GND = 0V; TA = –40°C to +85°C(2) Symbol Parameter Min. Typ. Max. Unit fMAX Maximum Operating Frequency 750 — — MHz tPLH tPHL Propagation Delay D0 to Q0, D1 to Q1 300 — 700 ps tSKEW Within-Device Skew(3) Part-to-Part Skew (Diff.) — — — — 50 250 ps tr tf LVDS Output Differential Rise/Fall Times (20% to 80%) 100 — 300 ps Note 1. Specification for packaged product only. Note 2. Equilibrium temperature. Note 3. Worst case difference between Q0 and Q1 from either D0 or D1, when both outputs have the same transition. M9999-110705 [email protected] or (408) 955-1690 6 Condition SuperLite™ SY55855V Micrel, Inc. EYE DIAGRAMS(1) Note 1. 622Mbps 3.3V LVPECL-to-LVDS 1.25Gbps 3.3V LVPECL-to-LVDS 1.5Gbps 3.3V LVPECL-to-LVDS 622Mbps 3.3V CML-to-LVDS 1.25Gbps 3.3V CML-to-LVDS 1.5Gbps 3.3V CML-to-LVDS 223–1 pattern. M9999-110705 [email protected] or (408) 955-1690 7 SuperLite™ SY55855V Micrel, Inc. 10-PIN MSOP (K10-1) Rev. 00 MICREL, INC. TEL 2180 FORTUNE DRIVE SAN JOSE, CA 95131 + 1 (408) 944-0800 FAX + 1 (408) 474-1000 WEB USA 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. M9999-110705 [email protected] or (408) 955-1690 8