SY88808L 10.3Gbps Transceiver with Programmable Equalization General Description The SY88808L high-speed transceiver is optimized for active copper cable assembly, backplane, and transmission line data-path management applications. The SY88808L is capable of equalizing serial data up to 10.3Gbps across up to 36 inches of FR4 or 10 meters of 26 AWG cable. The SY88808L differential inputs can directly interface to any differential signal as small as 150mVPK. Both channels of the transceiver have programmable EQ on the receiving end. The output of the transmitter can be programmed to provide an output swing from 100mVPK to 350mVPK. The output is optimized to drive into a 50Ω load. The AnyLength equalization circuit in the receiver can be programmed to optimize the eye of the data signal received from 0” to 36” of FR4 or 0m to 10m of 26AWG cable. Unlike discrete EQ settings, patent-pending AnyLength EQ provides optimal results as well as saves power. The SY88808L operates at 3.3V ±5% supply and its operation is guaranteed over the commercial temperature range of 0°C to +70°C. The SY88808L is part of Micrel’s ® high-speed, Precision Edge product line. Datasheets and support documentation can be found on Micrel’s web site at www.micrel.com. Precision Edge® Features • Programmable equalizing network optimize incoming data pattern • Equalization is optimized for any transmission length • Receives up to 36” FR4 PCB trace, or 10m of cable • 1Gbps through 10.3Gbps data rate throughput • Flexible I/O: – AC-coupled inputs and outputs – 50Ω source-terminated CML outputs minimize round-trip reflections – Wide input voltage range: 150mVPK to 350mVPK – Output disable • Input Loss-of-Signal – Hysteresis included • 3.3V ±5% supply voltage • 0°C to +70°C temperature range • Available in 28-pin (4mm x 4mm) QFN package Applications • • • • • Active Copper Cable Assembly ATE, T&M backplane management Serial backplane management Combination FR4+cable+interconnect receiver Fibre Channel, Ethernet, SONET/SDH data transmission Precision Edge is a registered trademark of Micrel, Inc Paralink is a registered trademark of LEONI Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com June 2010 M9999-063010-A [email protected] or (408) 955-1690 Micrel, Inc. SY88808L Typical Application Circuit Functional Block Diagram June 2010 2 M9999-063010-A [email protected] or (408) 955-1690 Micrel, Inc. SY88808L Ordering Information(1) Part Number Package Type Operating Range Package Marking SY88808LMH QFN-28 Commercial SY88808L with Pb-Free Bar-Line Indicator QFN-28 Commercial SY88808L with Pb-Free Bar-Line Indicator (2) SY88808LMHTR Notes: 1. Contact factory for die availability. Dice are guaranteed at TA = 25°C, DC Electricals only. 2. Tape and Reel. Pin Configuration 28-Pin QFN June 2010 3 M9999-063010-A [email protected] or (408) 955-1690 Micrel, Inc. SY88808L Pin Description Pin Number Pin Name Pin Function 1, 28 TXQ, /TXQ Differential Transmitter Output: This CML output pair is designed to drive 50Ω signals with variable output swing. 2, 13, 16, 27 VCC Positive power supply: Connect to 3.3V power supply. Bypass with 0.1μF||0.01μF low-ESR capacitors as close to VCC pins as possible. 3, 19 NC 4 TXSW RXEQDC, RXEQMF, 5, 10, 11, 12 RXEQHF, 24, 25 RXEQUHF, TXEQHF, TXEQUHF 6, 9, 20, 23 GND, Exposed Pad No connect. Programmable Swing Input pin: This input pin allows the user to set variable output swing. This pin can be programmed via external potentiometer (or a resistor) to output a swing from 100mVPK to 350mVPK. See “Programmable TX Output Swing” table for details. Programmable EQ: Equalization circuit can recover degraded signals after long traces of FR4 board. Equalization can be programmed via an external potentiometer (or resistor). This equalization scheme is optimized to recover degraded signal from any length of transmission line. The receiver of the RX channel can equalize up to 36” FR4 or 10m 26AWG cable. The receiver of the TX channel can equalize up to 9” FR4 or 3m 26AWG cable. RXEQDC, RXEQMF, RXEQHF, and RXEQUHF control DC, medium, high, and ultra high components of input data signals of RX channel respectively. TXEQHF and TXEQUHF control high and ultra high components of input data signals of TX channel respectively. See “Programmable Equalization” table for details. Ground: Ground pins and exposed pad must be connected to the same ground plane. 7, 8 RXIN, /RXIN Differential Receiver Input: This input pair is the differential input to the receive channel. It accepts differential AC-coupled signals as small as 150mVPK at the input of the transmission line. The input signal is fed in to an equalization circuit. The loss-of-signal (LOS) level includes a small amount of hysteresis to prevent the LOS output from oscillating when no signal is present. 14, 15 /RXQ, RXQ Differential Receiver Output: This CML output pair is designed to drive 250mVPK swing in to 50Ω. 17, 26 /RXEN, /TXEN 18 LOS 21, 22 June 2010 TXIN, /TXIN Single-Ended Input: TTL/CMOS compatible control input for the output pairs. The disable pins are internally connected to a 25kΩ pull-up resistor and will default to a logic HIGH state (Disable) if left open. When disabled, the Q goes LOW, and /Q goes HIGH. Default threshold is VCC/2. Single-Ended Output: This TTL/CMOS output signal switches LOW when the input signal of the receiver channel is valid and switches HIGH when the input signal is not valid. LOS is an open-collector output. Differential Transmitter Input: This input pair is the differential input to the transmit channel and accepts differential AC-coupled signals which are fed in to equalization circuit. Input swing is recommended to be ≥150mVPK at the input of the transmission line to ensure valid outputs. 4 M9999-063010-A [email protected] or (408) 955-1690 Micrel, Inc. SY88808L TX Output Swing Table Output Swing (mVPK) 100 250 350 TXSW (Ω) open 27 13 RX Channel Programmable Equalization Table FR4(1) Transmission Medium Cable(2) Length 36” 24” 18” 9” 10m RXEQDC (Ω) 95 45 35 25 60 RXEQMF (Ω) 305 330 215 230 330 RXEQHF (Ω) 180 195 290 1120 0 RXEQUHF (Ω) 50 105 260 850 0 TX Channel Programmable Equalization Table FR4(1) Transmission Medium Length 9” 0” TXEQHF(Ω) 1k 1M TXEQUHF (Ω) 1M 1M Notes: 1. 6mil wide 6.25mil thick strip line traces on FR4i room temperature; 1010 clock pattern and PRBS-23 data pattern. 2. 26 AWG, 10m LEONI Paralink 11 cable, L45468-J14-C245; 1010 clock pattern and PRBS-23 data pattern. June 2010 5 M9999-063010-A [email protected] or (408) 955-1690 Micrel, Inc. SY88808L Absolute Maximum Ratings(1) Operating Ratings(2) Supply Voltage (VCC) .................................... −0.5V to +4.0V Input Voltage (VIN). ........................................... −0.5V to VCC CML Output Voltage (VOUT) ............... VCC-1.0V to VCC+0.5V Input Current Source or Sink Current on (IN, /IN) ................... ± 50mA Maximum Operating Junction Temperature............. +125°C Lead Temperature (soldering, 20sec.) ..................... +260°C Storage Temperature (Ts)........................ −65°C to +150 °C Supply Voltage (VIN) ................................. +3.14V to +3.46V Ambient Temperature (TA) .............................. 0°C to +70°C (3) Package Thermal Resistance QFN (θJA) Still-Air ......................................................... 61°C/W QFN (ψJB) Junction-to-Board ........................................ 30°C/W Electrical Characteristics(4) VCC = 3.3V ±5%, TA = 0°C to +70°C, unless otherwise noted. Symbol Parameter Condition Min. Typ. Max. Units 3.14 3.3 3.46 V VCC Power Supply IEE Power Supply Current Maximum VCC, includes 50Ω internal source resistors, no external load current, maximum EQ settings. 180 235 mA Power Includes 50Ω internal source resistors, no external load current, maximum EQ settings. 594 814 mW 100 110 Ω 150 350 mVPK 300 700 mVPP RDIFF_IN VIN VDIFF_IN LOS Input Resistance (IN-to-/IN) Input Voltage Swing 90 RXIN, TXIN (Note 5) Differential Input Voltage Swing IN-/IN Loss-of-Signal Levels LOS De-Assert (Note 6) 75 LOS Assert (Note 6) 45 Hysteresis 90 55 3 mVPK dB Outputs DC Electrical Characteristics(5) VCC = 3.3V ±5%; VEE = 0V; TA = 0°C to + 70°C; RL = 100Ω across output pair; unless otherwise stated. Symbol Parameter VSWING Output Swing ROUT Output Resistance June 2010 Condition Min. Typ. Max. RXOUT 200 250 300 TXOUT, Programmable Swing 100 45 6 350 50 55 Units mVPK Ω M9999-063010-A [email protected] or (408) 955-1690 Micrel, Inc. SY88808L LVTTL/CMOS DC Electrical Characteristics(7) VCC = +3.3V ±5%, TA = 0°C to +70°C, unless otherwise stated. Symbol Parameter Condition Min. VIH Input HIGH Voltage VIL Input LOW Voltage IIH Input HIGH Current −125 IIL Input LOW Current −300 Typ. Max. 2 Units V 0.8 V 30 µA µA AC Electrical Characteristics(8) VCC = 3.3V ±5%; VEE = 0V; TA = 0°C to +70°C; RL = 100Ω across output pair; unless otherwise stated. Symbol Parameter Condition Min. FREQ Data Rate Throughput NRZ Data 1 tpd Differential Propagation Delay tSKEW Part-to-Part Skew Note 9 TXQ Enable/Disable Time /TXEN 450 600 RXQ Enable/Disable Time /RXEN 450 600 Deterministic Jitter (DJ) Note 10 10 Total Jitter (TJ) Note 11 20 LOSDELAY LOS Delay t_los_on and t_los_off (see Figure 1) 100 µs tr , tf Output Rise/Fall Time (20% to 80%) At Full Output Swing 60 ps t/EN tJITTER Typ. Max. Units 10.3 Gbps RXIN-to-RXQ 150 250 450 TXIN-to-TXQ 150 250 450 200 20 30 ps ps ps psPP Notes: 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 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. Package thermal resistance assumes exposed pad is soldered (or equivalent) to the devices most negative potential on the PCB. θJA and ΨJB values are determined for a 4-layer board in still air unless otherwise stated. 4. The circuit is designed to meet the DC specifications shown in the above table after thermal equilibrium has been established. TJ < 125°C. 5. Measured at input of the transmission line. 6. Measured with 101010 pattern at 10.3Gbps. 7. The circuit is designed to meet the DC specifications, shown in the above table, after thermal equilibrium has been established. TJ < 125°C. 8. High-frequency AC-parameters are guaranteed by design and characterization. 9. Part-to-part skew is defined for two parts with identical power supply voltages at the same temperature and with no skew of the edges at the respective inputs. 10. Deterministic jitter is measured with 211-1 PRBS pattern at 10.3Gbps. 11. Total jitter is measured with 211-1 PRBS pattern at 10.3Gbps. June 2010 7 M9999-063010-A [email protected] or (408) 955-1690 Micrel, Inc. SY88808L Typical Operating Characteristics VCC = 3.3V ±5%; VIN = 350mV; TA = 25°C, RL = 100Ω across output pair, unless otherwise stated. Transmission Medium: 36in FR4 Transmission Medium:10m, 26AWG Cable Test Set-Up June 2010 8 M9999-063010-A [email protected] or (408) 955-1690 Micrel, Inc. SY88808L Timing Diagram Figure 1. LOS Delay Output Interface Applications Figure 2. CML AC-Coupled Termination Related Product and Support Information Part Number Function Data Sheet Link SY56216R 6.4Gbps, Low-Voltage CML Dual Channel EQ Buffer www.micrel.com/_PDF/HBW/sy56216r.pdf HBW Solutions New Products and Applications www.micrel.com/product-info/products/solutions.shtml June 2010 9 M9999-063010-A [email protected] or (408) 955-1690 Micrel, Inc. SY88808L Package Information 28-Pin QFN 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 data sheet 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 a Purchaser’s own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale. © 2010 Micrel, Incorporated. June 2010 10 M9999-063010-A [email protected] or (408) 955-1690