XR17C158IV

Overview

The XR17C158IV is an octal Universal Asynchronous Receiver Transmitter (UART) integrated circuit manufactured by MaxLinear, Inc. It features eight independent channels supporting RS485 protocol and IrDA encoder/decoder functions. The device utilizes a PCI bus interface and includes 64-byte FIFOs per channel to facilitate high-speed data transfer with automatic flow control. Operating on a single 4.5V to 5.5V supply, it supports data rates up to 6.25Mbps. The component is housed in a 144-LQFP package measuring 20x20 mm, designed for surface mount applications.

Feature Summary

• Integrates eight UART channels with dedicated 64-byte FIFO buffers for each port.
• Supports RS485 communication protocols alongside IrDA encoding and decoding capabilities.
• Features automatic hardware flow control to manage data transmission efficiency.
• Connects to host systems via a standard PCI bus interface.

Applications

• Industrial automation systems requiring multiple serial connections
• Telecommunications equipment utilizing PCI-based architectures
• Embedded systems needing high-density serial I/O expansion

Procurement Notes

Verify the obsolete status of this component before procurement planning. Confirm availability through authorized distributors or secondary market suppliers. Ensure compatibility with existing PCI bus designs and validate that the 144-LQFP package dimensions fit the target PCB layout. Check for RoHS compliance documentation if required for specific regulatory standards.

Selection Notes

Select this component when designing systems requiring eight simultaneous serial ports connected via PCI. Consider the 6.25Mbps maximum data rate and 64-byte FIFO depth for buffer requirements. Verify that the 4.5V to 5.5V voltage range matches the system power supply. Evaluate the 144-LQFP footprint against available board space and thermal constraints.

Part Context

This part belongs to the XR17C158 series of octal UARTs. It is distinct from PCIe variants like the XR17V358 series which utilize different bus interfaces. The IV suffix typically denotes industrial temperature range specifications within the MaxLinear portfolio. It serves as a legacy solution for PCI-based multi-port serial expansion.

Replacement Considerations

MaxLinear recommends the XR17V358IB176-F as a manufacturer-recommended replacement. This substitute offers similar functionality but utilizes a PCIe interface instead of PCI. Designers must account for interface differences and potential firmware updates when migrating to the newer platform.

FAQ

What is the maximum data rate supported by the XR17C158IV?

The XR17C158IV supports a maximum data rate of 6.25Mbps across its eight channels.

Does the XR17C158IV support IrDA communication?

Yes, the device includes built-in IrDA encoder and decoder functionality for infrared communication.

What is the size of the FIFO buffer per channel?

Each of the eight UART channels is equipped with a 64-byte FIFO buffer.