Exar
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Exar Corporation powers connectivity with an extensive array of power management, communications, and interface silicon solutions. Exar´s power management ICs are used in a variety of applications and include LDOs, DC/DC switching regulators, PWM controllers, charge pumps, and microprocessor supervisors. The products are designed for use together to a create complete power management systems but can also be used as standalone solutions. Exar also offers online design tools to help designers create customized solutions using Exar products.
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Exar XRT83VL38 / XRT86VX38 8-Channel LIUs
The Exar XRT83VL38 is a fully integrated 8-channel long-haul and short-haul line interface unit (LIU) for T1 (1.544 Mbps) 100Ω, E1 (2.048 Mbps) 75Ω or 120Ω, J1 110Ω, or BITS Timing applications. The Exar XRT86VX38 is an 8-channel 1.55 Mbps or 2.048 Mbps DS1 / E1 / J1 framer and long-haul and short-haul LIU featuring R³ technology and BITS Timing element. The Exar XRT83VL38 LIU
features an Adaptive Receive Equalizer for up to 36dB cable
attenuation, Programable Transmit Pulse Shaper for E1,T1, or J1
short-haul interfaces, five fixed transmit pulse settings for T1
short-haul applications, plus a fully programmable waveform generator
for transmit output pulse shaping available for both T1 and E1 modes.
The XRT86VX38 framer and LIU supports Section 13 -
Synchronization Interface in ITU G.703 for both Transmit and Receive
Paths, SSM Synchronous Messaging Generation (BOC for T1, National Bits
for E1) on the Transmit Path, SSM Synchronous Messaging Extraction (BOC
for T1, National Bits for E1) on the Receive Path, BITS timing
generation on the Transmit Outputs, and BITS timing extraction from NRZ
data on the Analog Receive Path.
Exar XR21V14x UART
The Exar XR21V14x Universal Asynchronous Receiver Transmitter with USB 2.0 compliant bus interface is the industry's fastest UART series. The USB interface on the Exar XR21V14x supports 12 Mbps USB data transfer rate, USB suspend, resume, and remote wakeup operations. This EXAR UART operates from an internal 48 MHz clock, requires no external
crystal/oscillator, and can accurately generate any baud rate using the
internal clock. The UART series includes an automatic transceiver direction control feature that simplifies the hardware for RS-485 applications. The XR21V14x UART is ideal for portable appliances, external converters (dongles), battery-operated devices, and more.
Exar XRP7620 4-Channel LED Driver
The Exar XRP7620 4-channel adjustable current I2C controlled LED driver provides full independent control of each channel and can be programmed up to a current of 31.5mA in steps of 500µA. The Exar XRP7620 LED driver ensures uniform display brightness through better than 3% channel to channel current matching. This Exar LED driver also provides five internal registers to set operational configuration and individual channel programming. The independent software adjustable current setting on each channel allows for the full color spectrum in RGBW/RGBA LED applications as well as precise current sink function for I/O expansion. The XRP7620 is optimized for LED backlighting and RGBW/RGBA color mixing applications and can also be used as a generic software programmable current sink I/O expander.
Exar SP3495E - SP3497E High Speed Transceiver
The Exar SP3495E - SP3497E high speed transceiver series is suitable for high-speed bidirectional communication on multipoint bus transmission lines, designed for balanced data transmission, and compliant with both RS-485 and RS-422 EIA standards. The Exar SP3495E, SP3496E, and SP3497E each contain one differential driver and one differential receiver. This Exar transceiver series operates from a single 3.3V power supply and loads the data bus only half as much as a standard RS-485 unit load, allowing up to 64 devices to be connected simultaneously on a bus without violating required RS-485 signal margin and without using repeaters. The SP3495E - SP3497E transceiver series provides ESD protection up to ± 15kV on all RS-485 inputs and outputs and also includes hot swap glitch protection and advanced fail-safe receiver inputs.
