XR17C158CV-F UART IC Equivalent & Substitute Parts

Part Overview

The XR17C158CV-F is an 8-channel RS485 UART interface IC manufactured by MaxLinear, Inc., housed in a 144-LQFP package. This component is classified as obsolete, with 1,474 units currently available in inventory. The part operates at 5V supply voltage and supports data rates up to 6.25 Mbps with a 64-byte FIFO buffer. Due to its obsolete status, identifying functionally compatible substitute parts is essential for ongoing system support and new design implementations.

Substiute Parts

XR17C158CV-F

MaxLinear, Inc.In Stock: 1484XR17C158CV-F Datasheet

Current PartRFQ

XR17V358IB176-F

MaxLinear, Inc.In Stock: 28004XR17V358IB176-F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the XR17C158CV-F is determined by the following critical parameters:

• Channel Configuration: 8-channel RS485 UART functionality
• Protocol Support: RS485 serial communication standard
• Functional Features: Auto flow control, IrDA encoder/decoder, false start bit detection
• Mounting and Package: Surface mount technology compatibility
• Supply Voltage Compatibility: Operating voltage range requirements
• RoHS and Environmental Compliance: Regulatory and environmental standards

The XR17V358IB176-F qualifies as a substitute based on matching channel count, protocol support, and core functional features. However, differences in package type, FIFO capacity, data rate, and supply voltage specifications must be evaluated for specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The XR17V358IB176-F is an active product from MaxLinear, Inc., providing a path forward from the obsolete XR17C158CV-F. Both parts share the same 8-channel RS485 UART architecture with matching functional features including auto flow control, IrDA encoder/decoder, and false start bit detection.

Key considerations for selection:

• Product Status: The substitute is active, ensuring long-term availability and manufacturing support compared to the obsolete main part.
• Compliance: Both parts meet RoHS requirements. The substitute achieves ROHS3 compliance with REACH unaffected status, providing enhanced regulatory alignment.
• Supply Voltage: The main part operates at 5V; the substitute operates at 1.2V and 3.3V. System power architecture must accommodate this difference.
• Package Type: The main part uses 144-LQFP; the substitute uses 176-LFBGA. PCB layout and assembly processes must be adapted accordingly.
• Performance Enhancements: The substitute offers 256-byte FIFO (versus 64-byte) and 31.25 Mbps data rate (versus 6.25 Mbps), providing improved buffering and throughput capacity.

Frequently Asked Questions (FAQ)

Q: Can the XR17V358IB176-F directly replace the XR17C158CV-F without design modifications?

A: Direct pin-for-pin replacement is not possible due to package differences (144-LQFP versus 176-LFBGA) and supply voltage requirements (5V versus 1.2V/3.3V). PCB redesign and power supply modifications are required.

Q: Are the RS485 protocol implementations identical between these parts?

A: Both parts implement 8-channel RS485 UART functionality with matching feature sets (auto flow control, IrDA encoder/decoder, false start bit detection). Protocol compatibility is maintained.

Q: What are the implications of the different FIFO buffer sizes?

A: The substitute provides 256-byte FIFO compared to 64-byte in the main part. This larger buffer reduces the risk of data loss in high-throughput applications and allows for longer interrupt service latencies.

Q: Does the higher data rate of the substitute affect compatibility?

A: The substitute supports 31.25 Mbps versus 6.25 Mbps in the main part. Higher data rate capability is backward compatible with lower-speed applications. System clock and timing configurations must be verified for the target data rate.

Q: What packaging considerations apply to the 176-LFBGA substitute?

A: The 176-LFBGA package (13x13 mm) differs from the 144-LQFP (20x20 mm). BGA assembly requires different soldering processes, inspection methods, and thermal management considerations compared to LQFP packages.

Q: Are there supply voltage compatibility issues?

A: Yes. The main part requires 4.5V to 5.5V; the substitute requires 1.2V and 3.3V. System power distribution and voltage regulation must be redesigned to support the substitute's lower voltage requirements.