MAX9242/MAX9244/MAX9246/MAX9254 19-3954 Rev 4 7/09 21-Bit Deserializers with Programmable Spread Spectrum and DC Balance General Description Features Programmable 4%, 2%, or OFF Spread-Spectrum The MAX9242/MAX9244/MAX9246/MAX9254 deserialize Output for Reduced EMI three LVDS serial-data inputs into 21 single-ended LVC- MOS/LVTTL outputs. A separate parallel-rate LVDS clock Programmable DC-Balanced or Non-DC-Balanced provides the timing for deserialization. The MAX9242/ Modes MAX9244/MAX9246/MAX9254 feature spread-spectrum DC Balance Allows AC-Coupling for Wider Input capability, allowing the output data and clock frequency Common-Mode Voltage Range to spread over a specified range to reduce EMI. The sin- Spread Spectrum Operates in DC-Balanced or gle-ended data and clock outputs are programmable for Non-DC-Balanced Mode a frequency spread of 2%, 4%, or no spread. The High Output Drive (MAX9254) spread-spectrum function is also available when the / 4 Deskew by Oversampling MAX9242/MAX9244/MAX9246/MAX9254 operate in non- (MAX9242/MAX9244/MAX9254) DC-balanced mode. The modulation rate of the spread is 32kHz for a 33MHz LVDS clock input and scales linearly 16MHz-to-34MHz (DC-Balanced) and 20MHz-to- with frequency. The single-ended outputs have a sepa- 40MHz (Non-DC-Balanced) Operation (MAX9242/MAX9244/MAX9254) rate supply, allowing +1.8V to +5V output logic levels. 6MHz-to-18MHz (DC-Balanced) and 8MHz-to-20MHz The MAX9254 features high output drive current for both (Non-DC-Balanced) Operation (MAX9246) data and clock outputs for faster transition times in the presence of heavy capacitive loads. Rising-Edge (MAX9242) or Falling-Edge (MAX9244/MAX9246/MAX9254) Output Strobe The MAX9242/MAX9244/MAX9246/MAX9254 feature pro- High-Impedance Outputs when PWRDWN is Low grammable DC balance, allowing isolation between a Allow Output Busing serializer and deserializer using AC-coupling. The MAX9242/MAX9244/MAX9246/MAX9254 operate with the Separate Output Supply Allows Interface to +1.8V, +2.5V, +3.3V, and +5V Logic MAX9209/MAX9213 serializers and are available with a rising-edge strobe (MAX9242) or falling-edge strobe LVDS Inputs Meet ISO 10605 ESD Protection at (MAX9244/MAX9246/MAX9254). The LVDS inputs meet 30kV Air-Gap Discharge and 6kV Contact ISO 10605 ESD specifications with 30kV Air-Gap Discharge Discharge and 6kV Contact Discharge ratings. LVDS Inputs Meet IEC 61000-4-2 Level 4 ESD Protection at 15kV Air-Gap Discharge and 8kV Contact Discharge Applications LVDS Inputs Conform to ANSI TIA/EIA-644 Standard Automotive Navigation Systems +3.3V Main Power Supply Automotive DVD Entertainment Systems Ordering Information Digital Copiers PART TEMP RANGE PIN-PACKAGE Laser Printers MAX9242EUM -40C to +85C 48 TSSOP MAX9242EUM/V+ -40C to +85C 48 TSSOP Selector Guide MAX9242GUM -40C to +105C 48 TSSOP MAX9242GUM/V+ -40C to +105C 48 TSSOP FREQUENCY RANGE MAX9244EUM -40C to +85C 48 TSSOP STROBE OVER- NON-DC DC PART EDGE SAMPLING BALANCE BALANCE MAX9244EUM/V+ -40C to +85C 48 TSSOP (MHz) (MHz) MAX9244GUM -40C to +105C 48 TSSOP MAX9242 Rising Yes 20 to 40 16 to 34 MAX9244GUM/V+ -40C to +105C 48 TSSOP MAX9244 Falling Yes 20 to 40 16 to 34 +Denotes a lead(Pb)-free/RoHS-compliant package. /V denotes an automotive qualified part. MAX9246 Falling No 8 to 20 6 to 18 Note: All devices are available in lead(Pb)-free/RoHS-compliant MAX9254 Falling Yes 20 to 40 16 to 34 packaging. Specify lead(Pb)-free/RoHS compliant by adding a + symbol at the end of the part number when ordering. Pin Configuration appears at end of data sheet. Ordering Information continued at end of data sheet. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. EVALUATION KIT AVAILABLE21-Bit Deserializers with Programmable Spread Spectrum and DC Balance ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND.) IEC 61000-4-2 (R = 330, C = 150pF) D S V , LVDSV , PLLV .......................................-0.5V to +4.0V LVDS Inputs to GND (Air-Gap Discharge).....................15kV CC CC CC V ......................................................................-0.5V to +6.0V LVDS Inputs to GND (Contact Discharge).......................8kV CCO RxIN , RxCLKIN .................................................-0.5V to +4.0V ISO 10605 (R = 2.0k, C = 330pF) D S PWRDWN ..............................................................-0.5V to +6.0V LVDS Inputs to GND (Air-Gap Discharge).....................30kV SSG, DCB...................................................-0.5V to (V + 0.5V) LVDS Inputs to GND (Contact Discharge).......................6kV CC RxOUT , RxCLKOUT ...............................-0.5V to (V + 0.5V) Operating Temperature Range .........................-40C to +105C CCO Continuous Power Dissipation (T = +70C) Storage Temperature Range .............................-65C to +150C A 48-Pin TSSOP (derate 16mW/C above +70C) ........1282mW Junction Temperature......................................................+150C ESD Protection Lead Temperature (soldering, 10s) .................................+300C Human Body Model (R = 1.5k, C = 100pF) D S All Pins to GND .............................................................2.5kV Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. DC ELECTRICAL CHARACTERISTICS (V = LVDSV = PLLV = +3.0V to +3.6V, V = +3.0V to +5.5V, PWRDWN = high SSG = high, open, or low DCB = high or CC CC CC CCO low, differential input voltage V = 0.05V to 1.2V, input common-mode voltage V = V / 2 to 2.4V - V / 2 , unless otherwise ID CM ID ID noted. Typical values are at V = V = LVDSV = PLLV = +3.3V, V = 0.2V, V = +1.25V, T = +25C.) (Notes 1, 2) CC CCO CC CC ID CM A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS POWER SUPPLY V , CC Power-Supply Range LVDSV , 3.0 3.6 V CC PLLV CC Output-Supply Range V 1.8 5.5 V CCO 16MHz 50 68 DC-balanced mode (SSG = low) 34MHz 81 108 20MHz 55 73 C = 8pF, L Non-DC-balanced worst-case pattern, 33MHz 75 97 mode (SSG = low) V = V = 3.0V CC CCO 40MHz 83 110 Worst-Case Supply Current I to 3.6V, Figure 2 mA CCW 16MHz 62 85 D C - b alanc ed m od e (MAX9242, ( S SG = hi g h or op en ) 34MHz 101 135 MAX9244, MAX9254) 20MHz 67 91 N on-D C -bal a nced m ode 33MHz 93 123 ( S SG = hi g h or op en ) 40MHz 107 134 2 MAX9242/MAX9244/MAX9246/MAX9254