MAX9121/MAX9122 19-1909 Rev 0 6/01 Quad LVDS Line Receivers with Integrated Termination and Flow-Through Pinout General Description Features The MAX9121/MAX9122 quad low-voltage differential sig- Integrated Termination Eliminates Four External naling (LVDS) differential line receivers are ideal for appli- Resistors (MAX9122) cations requiring high data rates, low power, and low Flow-Through Pinout noise. The MAX9121/MAX9122 are guaranteed to receive data at speeds up to 500Mbps (250MHz) over controlled- Simplifies PC Board Layout impedance media of approximately 100 . The transmis- Reduces Crosstalk sion media may be printed circuit (PC) board traces or Pin Compatible with DS90LV048A cables. Guaranteed 500Mbps Data Rate The MAX9121/MAX9122 accept four LVDS differential inputs and translate them to LVCMOS outputs. The 300ps Pulse Skew (max) MAX9122 features integrated parallel termination resis- Conform to ANSI TIA/EIA-644 LVDS Standard tors (nominally 107 ), which eliminate the requirement for four discrete termination resistors and reduce stub Single +3.3V Supply lengths. The MAX9121 inputs are high impedance and Fail-Safe Circuit require an external termination resistor when used in a point-to-point connection. Ordering Information The devices support a wide common-mode input range of PART TEMP. RANGE PIN-PACKAGE 0.05V to 2.35V, allowing for ground potential differences MAX9121EUE -40C to +85C 16 TSSOP and common-mode noise between the driver and the MAX9121ESE -40C to +85C 16 SO receiver. A fail-safe feature sets the output high when the MAX9122EUE -40C to +85C 16 TSSOP inputs are open, or when the inputs are undriven and MAX9122ESE -40C to +85C 16 SO shorted or parallel terminated. The EN and EN inputs con- trol the high-impedance output. The enables are common Pin Configuration appears at end of data sheet. to all four receivers. Inputs conform to the ANSI TIA/EIA- 644 LVDS standard. Flow-through pinout simplifies PC Typical Application Circuit board layout and reduces crosstalk by separating the LVDS inputs and LVCMOS outputs. The MAX9121/ MAX9122 operate from a single +3.3V supply, and are LVDS SIGNALS specified for operation from -40C to +85C. These devices are available in 16-pin TSSOP and SO packages. Refer to the MAX9123 data sheet for a quad LVDS line dri- T 107 R X X ver with flow-through pinout. Applications Digital Copiers T 107 R X X Laser Printers Cellular Phone Base Stations LVTTL/LVCMOS LVTTL/LVCMOS Add/Drop Muxes DATA INPUT DATA OUTPUT Digital Cross-Connects T 107 R X X DSLAMs Network Switches/Routers Backplane Interconnect 107 Clock Distribution TX RX MAX9123 MAX9122 100 SHIELDED TWISTED CABLE OR MICROSTRIP PC BOARD TRACES 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 AVAILABLEQuad LVDS Line Receivers with Integrated Termination and Flow-Through Pinout ABSOLUTE MAXIMUM RATINGS V to GND...........................................................-0.3V to +4.0V Storage Temperature Range .............................-65C to +150C CC IN +, IN - to GND .................................................-0.3V to +4.0V Maximum Junction Temperature .....................................+150C EN, EN to GND...........................................-0.3V to (V + 0.3V) Operating Temperature Range ...........................-40C to +85C CC OUT to GND .............................................-0.3V to (V + 0.3V) Lead Temperature (soldering, 10s) .................................+300C CC Continuous Power Dissipation (T = +70C) ESD Protection A 16-Pin TSSOP (derate 9.4mW/C above +70C) .........755mW (Human Body Model, IN +, IN -) ....................................8kV 16-Pin SO (derate 8.7mW/C above +70C)................696mW 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 input voltage V = 0.1V to 1.0V, common-mode voltage V = V /2 to 2.4V - V /2 , CC ID CM ID ID T = -40C to +85C. Typical values are at V = +3.3V, T = +25C, unless otherwise noted.) (Note 1) A CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS LVDS INPUTS (IN +, IN -) Differential Input High Threshold V 100 mV TH Differential Input Low Threshold V -100 mV TL 0.1V V 0.6V -20 20 A ID Input Current (MAX9121) I +, I - IN IN 0.6V <V 1.0V -25 25 A ID 0.1V V 0.6V, V = 0 -20 20 A Power-Off Input Current ID CC I INOFF (MAX9121) 0.6V <V 1.0V, V = 0 -25 25 A ID CC Input Resistor 1 R V = 3.6V or 0, Figure 1 35 k IN1 CC Input Resistor 2 R V = 3.6V or 0, Figure 1 132 k IN2 CC Differential Input Resistance R V = 3.6V or 0, Figure 1 90 107 132 DIFF CC (MAX9122) LVCMOS/LVTTL OUTPUTS (OUT ) Open, undriven short, or undriven 100 parallel 2.7 3.2 I = -4.0mA OH termination (MAX9121) Output High Voltage (Table 1) V V OH V = +100mV 2.7 3.2 ID Open or undriven short 2.7 3.2 I = -4.0mA OH (MAX9122) V = +100mV 2.7 3.2 ID Output Low Voltage V I = +4.0mA, V = -100mV 0.1 0.25 V OL OL ID Output Short-Circuit Current I Enabled, V = 0.1V, V = 0 (Note 2) -15 -120 mA OS ID OUT Output High-Impedance Current I Disabled, V = 0 or V -10 +10 A OZ OUT CC 2 MAX9121/MAX9122