MAX3681 19-1091 Rev 1 5/04 +3.3V, 622Mbps, SDH/SONET 1:4 Deserializer with LVDS Outputs General Description Features The MAX3681 deserializer is ideal for converting Single +3.3V Supply 622Mbps serial data to 4-bit-wide, 155Mbps parallel 622Mbps Serial to 155Mbps Parallel Conversion data in ATM and SDH/SONET applications. Operating from a single +3.3V supply, this device accepts PECL 265mW Power serial clock and data inputs, and delivers low-voltage LVDS Data Outputs and Synchronization Inputs differential-signal (LVDS) clock and data outputs for interfacing with high-speed digital circuitry. It also pro- Synchronization Input for Data Realignment and vides an LVDS synchronization input that enables data Reframing realignment and reframing. Differential 3.3V PECL Clock and Data Inputs The MAX3681 is available in the extended-industrial temperature range (-40C to +85C), in a 24-pin SSOP package. Applications Ordering Information 622Mbps SDH/SONET Transmission Systems PART TEMP RANGE PIN-PACKAGE 622Mbps ATM/SONET Access Nodes MAX3681EAG -40C to +85C 24 SSOP MAX3681EAG+ -40C to +85C 24 SSOP Add/Drop Multiplexers +Denotes Lead Free Package Digital Cross Connects Pin Configuration appears at end of data sheet. Typical Operating Circuit V = +3.3V CC V CC PD3+ 100* V = +3.3V CC V = +3.3V PD3- CC MAX3681 PD2+ 130 130 100* SD+ PHOTODIODE PD2- MAX3675 OVERHEAD SD- PD1+ TERMINATION 82 82 100* DATA PD1- AND LIMITING PREAMP 100 CLOCK PD0+ AMP V = +3.3V CC RECOVERY 100* MAX3664 130 130 PD0- PCLK+ SCLK+ 100* SCLK- PCLK- 82 82 SYNC+ SYNC- GND *REQUIRED ONLY IF OVERHEAD CIRCUIT DOES NOT INCLUDE INTERNAL INPUT TERMINATION. THIS SYMBOL REPRESENTS A TRANSMISSION LINE OF CHARACTERISTIC IMPEDANCE Z = 50. 0 Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. EVALUATION KIT AVAILABLE+3.3V, 622Mbps, SDH/SONET 1:4 Deserializer with LVDS Outputs ABSOLUTE MAXIMUM RATINGS Terminal Voltage (with respect to GND) Continuous Power Dissipation (T = +85C) A V ...........................................................................-0.5V to 5V SSOP (derate 8.00mW/C above +85C) ......................520mW CC PECL Inputs (SD+/-, SCLK+/-).................................V + 0.5V Operating Temperature Range ...........................-40C to +85C CC LVDS Inputs (SYNC+/-)............................................V + 0.5V Storage Temperature Range .............................-65C to +160C CC Output Current, LVDS Outputs (PCLK+/-, PD +/-) .............10mA Lead Temperature (soldering, 10sec) .............................+300C 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 = +3.0V to +3.6V, differential loads = 100, T = -40C to +85C, unless otherwise noted. Typical values are at V = +3.3V, CC A CC T = +25C.) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Current I 55 80 120 mA CC PECL INPUTS (SD+/-, SCLK+/-) Input High Voltage V V - 1.16 V - 0.88 V IH CC CC Input Low Voltage V V - 1.81 V - 1.48 V IL CC CC Input High Current I V = V -10 10 A IH IN IH(MAX) Input Low Current I V = V -10 10 A IL IN IL(MAX) LVDS INPUTS AND OUTPUTS (SYNC+/-, PCLK+/-, PD +/-) Input Voltage Range V Differential input voltage = 100mV 0 2.4 V I Differential Input Threshold V Common-mode voltage = 50mV -100 100 mV IDTH Threshold Hysteresis V 70 mV HYST Differential Input Resistance R 85 100 115 IN Output High Voltage V 1.475 V OH Output Low Voltage V 0.925 V OL Differential Output Voltage V 250 400 mV OD Change in Magnitude of Differential Output Voltage for Complementary V 25 mV OD States Output Offset Voltage V T = +25C 1.125 1.275 V OS A Change in Magnitude of Output Offset Voltage for Complementary V 25 mV OS States Single-Ended Output Resistance R 40 70 140 O Change in Magnitude of Single- Ended Output Resistance for R 1 10 % O Complementary States AC ELECTRICAL CHARACTERISTICS (V = +3.0V to +3.6V, differential loads = 100, T = +25C, unless otherwise noted.) (Note 1) CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Maximum Serial Clock Frequency f 622 MHz SCLK Serial Data Setup Time t 800 ps SU Serial Data Hold Time t 50 ps H Parallel Clock to Data Output Delay t 200 550 900 ps CLK-Q Note 1: AC Characteristics guaranteed by design and characterization. 2 MAX3681