Renesas Electronics Corporation

The ISL8487E, ISL81487L, and ISL81487E RS-485/RS-422 devices are ESD protected, fractional unit load (UL), BiCMOS, 5V powered, single transceivers that meet both the RS-485 and RS-422 standards for balanced communication. Each driver output/receiver input is protected against ±15kV ESD strikes without latch-up. Unlike competitive devices, this device family is specified for 10% tolerance supplies (4. 5V to 5. 5V). All devices present a 1/8 unit load to the RS-485 bus, which allows up to 256 transceivers on the network for large node count systems (for example, process automation and remote meter reading systems). In a remote utility meter reading system, individual utility meter readings (in apartments, for example) are routed to a concentrator with an RS-485 network, so the high allowed node count minimizes the number of repeaters required to network all the meters. Data for all meters is then read out from the concentrator from a single access port or a wireless link. Slew rate limited drivers on the ISL8487E and ISL81487L reduce EMI and minimize reflections from improperly terminated transmission lines or unterminated stubs in multidrop and multipoint applications. Data rates up to 250kbps are achievable with these devices. Data rates up to 5Mbps are achievable by using the ISL81487E, which features higher slew rates. The receiver (Rx) inputs feature a "fail-safe if open" design, which ensures a logic high Rx output if Rx inputs are floating. The driver (Tx) outputs are short-circuit protected, even for voltages exceeding the power supply voltage. Additionally, on-chip thermal shutdown circuitry disables the Tx outputs to prevent damage if power dissipation becomes excessive. The half duplex devices multiplex the Rx inputs and Tx outputs to allow transceivers with Rx and Tx disable functions in 8 lead packages.

The ISL8200AM is a simple and easy to use high power, current-sharing DC/DC power module for datacom, telecom, and FPGA power hungry applications. All that is needed is the ISL8200AM, a few passive components, and one VOUTsetting resistor to have a complete 10A design ready for market. The ease of use practically eliminates design and manufacturing risks while dramatically improving time to market. Parallel up to six ISL8200AM modules to scale up to a 60A solution for more output current. The simplicity of the ISL8200AM is in its "off-the-shelf", unassisted implementation compared to a discrete implementation. Patented current sharing in multiphase operation greatly reduces ripple currents, BOM cost, and complexity. For example, parallel two devices for 20A of current and up to six for 60A of current. The output voltage can be precisely regulated to as low as 0. 6V with ±1% output voltage regulation over line, load, and temperature variations. The ISL8200AM’s thermally enhanced, compact QFN package operates at full load and over-temperature without requiring forced air cooling. The package is so thin it can even fit on the backside of the PCB. Easy access to all pins with few external components reduces the PCB design to a component layer and a simple ground layer.

The ISL8200AMMREP is a simple and easy to use high power, current-sharing DC/DC power module for Datacom/Telecom/FPGA power hungry applications. All that is needed is the ISL8200AMMREP, a few passive components and one VOUT setting resistor to have a complete 10A design ready for market. The ease of use virtually eliminates the design and manufacturing risks while dramatically improving time to market. Need more output current? Parallel up to six ISL8200AMMREP modules to scale up to a 60A solution. The simplicity of the ISL8200AMMREP is in its Off The Shelf, unassisted implementation versus a discrete implementation. Patented current sharing in multi-phase operation greatly reduces ripple currents, BOM cost and complexity. For example, parallel 2 for 20A and up to 6 for 60A. The output voltage can be precisely regulated to as low as 0. 6V with ±1% output voltage regulation over line, load, and temperature variations. The ISL8200AMMREP’s thermally enhanced, compact QFN package, operates at full load and over-temperature, without requiring forced air cooling. It's so thin it can even fit on the back side of the PCB. Easy access to all pins with few external components, reduces the PCB design to a component layer and a simple ground layer.

The ISL8201M is a 20V, 10A output current, variable output step-down power supply. Included in the 15mmx15mm package is a high performance PWM controller switching at 600kHz, power MOSFETs, an inductor, and all the passive components required for complete DC/DC power solution. The ISL8201M operates over an input voltage range of 1V to 20V and supports an output voltage range of 0. 6V to 5V, which is set by a single dividing resistor. This high efficiency power module is capable of delivering 10A (17A peak) output with up to 95% efficiency, needing no heat sinks or airflow to meet power specifications. Only bulk input and output capacitors are needed to finish the design. Utilizing voltage-mode control, the output voltage can be precisely regulated to as low as 0. 6V with up to ±1% output voltage regulation. The ISL8201M also features internal compensation, internal soft-start, auto-recovery overcurrent protection, an enable option, and pre-biased output start-up capability. The ISL8201M is packaged in a thermally enhanced, compact (15mmx15mm) and low profile (3. 5mm) overmolded QFN Package Module suitable for automated assembly by standard surface mount equipment. The ISL8201M is RoHS compliant.