XX-XXXX; Rev 0; 9/05 Programmable Spread-Spectrum and DC-Balance 21-Bit Deserializer Features The MAX9232 deserializes three LVDS serial-data inputs into 21 single-ended LVCMOS/LVTTL outputs. A separate parallel-rate LVDS clock provides the timing for deserialization. The MAX9232 features spread-spectrum capability, allowing the output data and clock frequency to spread over a specified range to reduce EMI. The single-ended data and clock outputs are programmable for a frequency spread of ±2%, ±4%, or no spread. The spread-spectrum function is also available when the MAX9232 operates in non-DC-balanced mode. The modulation rate of the spread is 32kHz for a 33MHz LVDS clock input and scales linearly with frequency. Using VSYNC on RxOUT13 and HSYNC on RxOUT6, a reset of the spread-spectrum FIFO is performed every frame, preventing FIFO overflow and underflow. The single-ended outputs have a separate supply, allowing +1.8V to +5V output logic levels. ♦ Programmable ±4%, ±2%, or OFF Spread-Spectrum Output for Reduced EMI ♦ Programmable DC Balance or Non-DC Balance ♦ DC Balance Allows AC-Coupling for Wider Input Common-Mode Voltage Range ♦ Spread Spectrum Operates in DC-Balanced or NonDC-Balanced Mode ♦ FIFO Reset During Vertical Blanking ♦ 16MHz-to-34MHz (DC-Balanced) and 20MHz-to40MHz (Non-DC-Balanced) Operation ♦ High-Impedance Outputs when PWRDWN is Low Allow Output Busing ♦ Fail-Safe Inputs in Non-DC-Balanced Mode ♦ Separate Output Supply Pins Allow Interface to +1.8V, +2.5V, +3.3V, and +5V Logic ♦ LVDS Inputs Meet ISO 10605 ESD Protection at ±25kV Air Discharge and ±8kV Contact Discharge ♦ LVDS Inputs Meet IEC 61000-4-2 Level 4 ESD Protection at ±15kV Air and ±8kV Contact Discharge ♦ LVDS Inputs Conform to ANSI TIA/EIA-644 Standard ♦ +3.3V Main Power Supply The MAX9232 features programmable DC balance, allowing isolation between a serializer and deserializer using AC-coupling. The MAX9232 operates with the MAX9209/MAX9213 serializer and has a falling-edge strobe. The LVDS inputs meet ISO 10605 ESD specifications with ±25kV Air-Gap Discharge and ±8kV Contact Discharge ratings. The MAX9232 is available in a 48-pin TSSOP package and operates within the -40°C to +85°C temperature range. Applications Pin Configuration TOP VIEW RxOUT17 1 48 VCCO RxOUT18 2 47 RxOUT16 GND 3 46 RxOUT15 Automotive Navigation Systems RxOUT19 4 45 RxOUT14 Automotive DVD Entertainment Systems RxOUT20 5 44 GND SSG 6 43 RxOUT13 DCB 7 42 VCC RxIN0- 8 41 RxOUT12 RxIN0+ 9 40 RxOUT11 RxIN1- 10 39 RxOUT10 RxIN1+ 11 38 GND 37 RxOUT9 36 VCCO Digital Copiers Laser Printers Ordering Information PART MAX9232EUM TEMP RANGE -40°C to +85°C PIN-PACKAGE 48 TSSOP LVDSVCC 12 PKG CODE LVDSGND 13 RxIN2- 14 35 RxOUT8 U48-1 RxIN2+ 15 34 RxOUT7 RxCLKIN- 16 33 RxOUT6 RxCLKIN+ 17 32 GND LVDSGND 18 31 RxOUT5 PLLGND 19 30 RxOUT4 PLLVCC 20 29 RxOUT3 PLLGND 21 28 VCCO PWRDWN 22 27 RxOUT2 RxCLKOUT 23 26 RxOUT1 RxOUT0 24 25 GND MAX9232 TSSOP ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 MAX9232 General Description