MAX9157 19-2287 Rev 0 1/02 Quad Bus LVDS Transceiver General Description Features The MAX9157 is a quad bus LVDS (BLVDS) transceiver 32-TQFP and Space-Saving 32-QFN Packages for heavily loaded, half-duplex multipoint buses. Small 52mV LVDS Input Hysteresis 32-pin QFN and TQFP packages and flow-through pinouts allow the transceiver to be placed near the con- 1ns (min) Transition Time (0% to 100%) Minimizes nector for the shortest possible stub length. The Reflections MAX9157 drives LVDS levels into a 27 load (double Guaranteed 7.2pF (max) Bus Load Capacitance terminated, heavily loaded LVDS bus) at up to 200Mbps. An input fail-safe circuit ensures the receiver Glitch-Free Power-Up and Power-Down output is high when the differential inputs are open, or Hot-Swappable, High-Impedance I/O with V = 0 undriven and shorted, or undriven and terminated. The CC MAX9157 differential inputs feature 52mV hysteresis for or Open greater immunity to bus noise and reflections. The Guaranteed 200Mbps Driver Data Rate MAX9157 operates from a single 3.3V supply, consum- ing 80.9mA supply current with drivers enabled, and Fail-Safe Circuit 22.7mA with drivers disabled. Flow-Through Pinout The MAX9157s high-impedance I/Os (except for receiver outputs) when V = 0 or open, combined CC with glitch-free power-up and power-down, allow hot swapping of cards in multicard bus systems 7.2pF (max) BLVDS I/O capacitances minimize bus loading. The MAX9157 is offered in 5mm 5mm 32-pin QFN and TQFP packages. The MAX9157 is fully specified for the Ordering Information -40C to +85C extended temperature range. Refer to the MAX9129 data sheet for a quad BLVDS driver, ideal PART TEMP RANGE PIN-PACKAGE for dual multipoint full-duplex buses. MAX9157EGJ -40C to +85C 32 QFN (5mm 5mm) MAX9157EHJ -40C to +85C 32 TQFP (5mm 5mm) Applications Add/Drop Muxes Cellular Phone Base Pin Configurations appear at end of data sheet. Stations Digital Cross-Connects Functional Diagram appears at end of data sheet. DSLAMs Network Switches/Routers Multipoint Buses Typical Operating Circuit MAX9157 MAX9157 MAX9157 CARD 1 CARD 15 CARD 16 1in CARD SPACING Rt = 54 Rt = 54 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.Quad Bus LVDS Transceiver ABSOLUTE MAXIMUM RATINGS V , AV to GND................................................-0.3V to +4.0V MAX9157EHJ (derate 11.1mW/C above +70C).........889mW CC CC DO +/RIN +, DO -/RIN -, to GND .......................-0.3V to +4.0V Storage Temperature Range .............................-65C to +150C DIN , DE , RE to GND.........................................-0.3V to +4.0V Maximum Junction Temperature .....................................+150C RO to GND................................................-0.3V to (V + 0.3V) Operating Temperature Range ...........................-40C to +85C CC AGND to GND .......................................................-0.3V to +0.3V ESD Protection Short-Circuit Duration (DO +/RIN +, DO -/RIN -) ....Continuous Human Body Model (DO +/RIN +, DO -/RIN -).............4kV Continuous Power Dissipation (T = +70C) Lead Temperature (soldering, 10s) .................................+300C A MAX9157EGJ (derate 21.2mW/C above +70C) .....1702mW 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, R = 27 1%, differential input voltage V = 0.1V to V , input common-mode voltage V = 0.05V to 2.4V, CC L ID CC CM input voltage range = 0 to V , DE = high, RE = low, T = -40C to +85C, unless otherwise noted. Typical values are at V = CC A CC 3.3V, V = 0.2V, V = 1.2V, and T = +25C.) (Notes 1 and 2) ID CM A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS BLVDS (DO +/RIN +, DO -/RIN -) Differential Input High Threshold V DE = low 26 100 mV TH Differential Input Low Threshold V DE = low -100 -26 mV TL T = +25C, V = 3.3V, A CC 12 26 43 V = 1.2V Threshold Hysteresis (Note 3) V DE = low CM mV HYST Full operating range 9 26 78 0.1V V 0.6V, DE = low -15 1.8 15 A ID Input Current I , I IN+ IN- 0.6V < V 1.2V, DE = low -20 2.5 20 A ID R V = 3.6V, 0 or open, Figure 1 53 k IN1 CC Input Resistance R V = 3.6V, 0 or open, Figure 1 148 k IN2 CC 0.1V V 0.6V, V = 0 or open -15 0.9 15 A ID CC I , INO+ Power-Off Input Current I INO- 0.6V < V 1.2V, V = 0 or open -20 1.8 20 A ID CC Differential Output Voltage V Figure 2 250 405 460 mV OD Change in Magnitude of V for OD V Figure 2 1 25 mV OD Complementary Output States Offset Voltage V Figure 2 1.185 1.302 1.435 V OS Change in Magnitude of V for OS V Figure 2 3.3 25 mV OS Complementary Output States Output High Voltage V Figure 2 1.505 1.6 V OH Output Low Voltage V Figure 2 0.9 1.099 V OL DIN = high, DO +/RIN + = 0 or -30 -14.8 30 V , DO -/RIN - = 0 or V CC CC Output Short-Circuit Current I mA OS DIN = low, DO -/RIN - = 0 or -30 -14.8 30 V , DO +/RIN + = 0 or V CC CC 2 MAX9157