ISL4486, ISL81486 Data Sheet August 2004 FN6060.2 5V, Ultra High Speed, PROFIBUS, Features RS-485/RS-422 Transceivers Specified for 10% Tolerance Supplies The Intersil ISL4486 and ISL81486 are BiCMOS, 5V High Data Rates powered, single transceivers that meet both the RS-485 and ISL4486 up to 40Mbps RS-422 standards for balanced communication, and feature ISL81486 . up to 30Mbps the larger output voltage and higher data rate - up to Large Differential Output Voltage 3V into 54 40Mbps - required by high speed PROFIBUS applications. Low Bit-to-Bit (Part-to-Part) Skew for Parallel Applications Unlike competitive products, these Intersil devices are specified for 10% tolerance supplies (4.5V to 5.5V) and 0.6 Unit Load Allows up to 50 Devices on the Bus deliver at least a 2.3V differential output voltage over this ISL81486 is a Drop-In Replacement for the ADM1486 supply range. At the 5% tolerance specified by many Low Quiescent Current . 800A competitors, the ISL4486 delivers an unsurpassed 2.5V differential signal into a 54 total load. This translates into -7V to +12V Common Mode Input Voltage Range longer reach, or better data integrity, at the exceptional Three-State Rx and Tx Outputs 40Mbps data rate. 14ns (Max) Propagation Delays, 2ns (Max) Skew SCSI applications benefit from the ISL4486s low receiver and transmitter part-to-part skews, which make it perfect for Operates from a Single +5V Supply (10% Tolerance) high speed parallel applications where large numbers of bits Current Limiting and Thermal Shutdown for driver must be simultaneously captured. The low bit-to-bit skew Overload Protection eases the timing constraints on the data latching signal. Pb-free available These devices present a 0.6 unit load to the RS-485 bus, which allows up to 50 transceivers on the network. Applications Receiver (Rx) inputs feature a fail-safe if open design, SCSI Fast 40 Drivers and Receivers which ensures a logic high Rx output if Rx inputs are floating. PROFIBUS DP and FMS Networks Driver (Tx) outputs are short circuit protected, even for Factory Automation voltages exceeding the power supply voltage. Additionally, Field Bus Networks on-chip thermal shutdown circuitry disables the Tx outputs to prevent damage if power dissipation becomes excessive. Security Networks Building Environmental Control Systems Ordering Information Industrial/Process Control Networks TEMP. PKG. PART NO. (BRAND) RANGE (C) PACKAGE DWG. ISL4486IB (4486IB) -40 to 85 8 Ld SOIC M8.15 Pinout ISL4486IBZ (4486IB) -40 to 85 8 Ld SOIC M8.15 ISL4486, ISL81486 (SOIC, MSOP) (See Note) (Pb-free) TOP VIEW ISL4486IU (4486) -40 to 85 8 Ld MSOP M8.118 ISL4486IUZ (4486) -40 to 85 8 Ld MSOP M8.118 RO 1 8 V CC R (See Note) (Pb-free) RE 2 7 B/Z ISL81486IB (81486IB) -40 to 85 8 Ld SOIC M8.15 DE 3 6 A/Y ISL81486IBZ -40 to 85 8 Ld SOIC M8.15 D (81486IB) (See Note) (Pb-free) DI 4 5 GND ISL81486IU (1486) -40 to 85 8 Ld MSOP M8.118 ISL81486IUZ (1486) -40 to 85 8 Ld MSOP M8.118 (See Note) (Pb-free) *Add -T suffix to part number for tape and reel packaging. NOTE: Intersil Pb-free products employ special Pb-free material sets molding compounds/die attach materials and 100% matte tin plate termination finish, which is compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J Std-020B. CAUTION: These devices are sensitive to electrostatic discharge follow proper IC Handling Procedures. 1 1-888-INTERSIL or 321-724-7143 Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2004. All Rights Reserved All other trademarks mentioned are the property of their respective owners.ISL4486, ISL81486 Truth Table Truth Table TRANSMITTING RECEIVING INPUTS OUTPUTS INPUTS OUTPUT RE DE DI B/Z A/Y RE DE A-B RO X 1101 00 +0.2V 1 X 1010 00 -0.2V 0 X 0 X High-Z High-Z 0 0 Inputs Open 1 1 X X High-Z Pin Descriptions PIN FUNCTION RO Receiver output: If A > B by at least 0.2V, RO is high If A < B by 0.2V or more, RO is low RO = High if A and B are unconnected (floating). RE Receiver output enable. RO is enabled when RE is low RO is high impedance when RE is high. DE Driver output enable. The driver outputs, Y and Z, are enabled by bringing DE high. They are high impedance when DE is low. DI Driver input. A low on DI forces output Y low and output Z high. Similarly, a high on DI forces output Y high and output Z low. GND Ground connection. A/Y RS-485/422 level, noninverting receiver input and noninverting driver output. Pin is an input (A) if DE = 0 pin is an output (Y) if DE = 1. B/Z RS-485/422 level, inverting receiver input and inverting driver output. Pin is an input (B) if DE = 0 pin is an output (Z) if DE = 1. V System power supply input (4.5V to 5.5V). CC Typical Operating Circuit ISL4486 +5V +5V + + 0.1F 0.1F 8 8 V V CC CC 1 RO 4 DI R D 2 RE R R 3 7 T 7 B/Z DE B/Z T 6 A/Y 3 DE A/Y 6 2 RE 4 DI RO 1 R D GND GND 5 5 2