XR68M752IL32-F Equivalent & Substitute Parts

Part Overview

The XR68M752IL32-F is a dual-channel UART interface IC manufactured by MaxLinear, Inc., featuring a 64-byte FIFO buffer, RS232/RS422/RS485 protocol support, and a 32-QFN (5x5) surface mount package. This component is classified as Last Time Buy, indicating end-of-life status. Alternative equivalent and substitute parts are necessary for ongoing design support, inventory replenishment, and long-term product availability assurance.

Key Parameters

Parameter	XR68M752IL32-F
Manufacturer	MaxLinear, Inc.
Category	Interface
Description	IC UART FIFO 64B DUAL 32QFN
Number of Channels	2 (DUART)
FIFO Size	64 Byte
Protocol Support	RS232, RS422, RS485
Data Rate (Max)	16 Mbps
Voltage Supply Range	1.62V ~ 3.63V
Auto Flow Control	Yes
IrDA Encoder/Decoder	Yes
False Start Bit Detection	Yes
Modem Control	Yes
Package / Case	32-VFQFN Exposed Pad
Mounting Type	Surface Mount
RoHS Status	RoHS Compliant
MSL Rating	2 (1 Year)
Product Status	Last Time Buy

Substitute Part Grouping Explanation

Substitution eligibility for the XR68M752IL32-F is determined by the following critical parameters:

Primary Substitution Criteria:

Number of Channels: 2 (DUART) — all substitutes must maintain dual-channel architecture
Package / Case: 32-VFQFN Exposed Pad — physical and electrical compatibility requirement
Mounting Type: Surface Mount — PCB assembly compatibility
Auto Flow Control: Yes — functional requirement
False Start Bit Detection: Yes — protocol integrity feature
Modem Control: Yes — control signal support

Secondary Compatibility Factors:

FIFO Size: 64-byte buffer preferred; 16-byte alternatives acceptable with system-level buffering considerations
Protocol Support: RS232/RS422/RS485 preferred; RS232/RS422 only acceptable if RS485 not required by application
Data Rate: 16 Mbps maximum; lower rates acceptable if application bandwidth permits
Voltage Supply Range: Must encompass or overlap application operating voltage
IrDA Encoder/Decoder: Feature presence varies; absence acceptable if IrDA not required

Substitute parts are grouped into two categories: Direct Equivalents (64-byte FIFO, full protocol support) and Functional Alternatives (16-byte FIFO, reduced protocol support, lower data rates).

Parameter Comparison

Parameter	XR68M752IL32-F	XR16V2550IL-F	SC16C752BIBS,157	TL16C2550IRHB	TL16C2550IRHBR	TL16C2550RHB	TL16C2550RHBR	TL16C752CIRHBR	TL16C752CRHBR
Manufacturer	MaxLinear	MaxLinear	NXP USA Inc.	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Number of Channels	2 (DUART)	2 (DUART)	2 (DUART)	2 (DUART)	2 (DUART)	2 (DUART)	2 (DUART)	2 (DUART)	2 (DUART)
FIFO Size	64 Byte	16 Byte	64 Byte	16 Byte	16 Byte	16 Byte	16 Byte	64 Byte	64 Byte
Data Rate (Max)	16 Mbps	16 Mbps	5 Mbps	1.5 Mbps	1.5 Mbps	1.5 Mbps	1.5 Mbps	3 Mbps	3 Mbps
Voltage Supply Range	1.62V ~ 3.63V	2.25V ~ 3.6V	2.5V, 3.3V, 5V	1.8V ~ 5V	1.8V ~ 5V	1.8V ~ 5V	1.8V ~ 5V	1.62V ~ 5.5V	1.62V ~ 5.5V
Auto Flow Control	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
False Start Bit Detection	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Modem Control	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Package / Case	32-VFQFN Exposed Pad	32-VFQFN Exposed Pad	32-VFQFN Exposed Pad	32-VFQFN Exposed Pad	32-VFQFN Exposed Pad	32-VFQFN Exposed Pad	32-VFQFN Exposed Pad	32-VFQFN Exposed Pad	32-VFQFN Exposed Pad
RoHS Status	RoHS Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Last Time Buy	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Direct Equivalents (64-Byte FIFO, Recommended for Pin-Compatible Replacement):

TL16C752CIRHBR and TL16C752CRHBR (Texas Instruments) provide the closest functional equivalence to the XR68M752IL32-F. Both maintain 64-byte FIFO capacity, dual-channel DUART architecture, and identical 32-VFQFN package geometry. These parts are in Active product status with ROHS3 compliance and REACH Unaffected certification. The extended voltage supply range (1.62V ~ 5.5V) provides superior compatibility across diverse application environments. RS485 protocol support aligns with the original part's communication requirements. TL16C752CIRHBR is available in Cut Tape (CT) & Digi-Reel packaging with 34,897 units in stock; TL16C752CRHBR is available in Tape & Reel (TR) packaging with 1,987 units in stock.

SC16C752BIBS,157 (NXP USA Inc.) offers 64-byte FIFO equivalence with Active product status and ROHS3 compliance. MSL rating of 1 (Unlimited) provides superior moisture tolerance compared to the original part's MSL 2 rating. However, maximum data rate of 5 Mbps represents a reduction from the original 16 Mbps specification. This part is suitable for applications where data rate requirements do not exceed 5 Mbps. Inventory availability is 890 units in Tray packaging.

Functional Alternatives (16-Byte FIFO, System-Level Buffering Required):

XR16V2550IL-F (MaxLinear, Inc.) maintains manufacturer continuity with Active product status. The 16-byte FIFO requires external buffering or reduced throughput tolerance. Voltage supply range (2.25V ~ 3.6V) is narrower than the original part. Maximum data rate of 16 Mbps matches the original specification. This part is suitable for designs where FIFO depth reduction is acceptable. Inventory: 2,850 units in Tray packaging.

TL16C2550 variants (Texas Instruments) — IRHB, IRHBR, RHB, RHBR — provide 16-byte FIFO alternatives with Active product status and ROHS3 compliance. Extended voltage supply range (1.8V ~ 5V) accommodates broader application requirements. Maximum data rate of 1.5 Mbps represents significant reduction from original 16 Mbps specification; these parts are suitable only for low-speed serial communication applications. Packaging options include standard Tray (RHB), Tape & Reel (IRHBR, RHBR), and unspecified (IRHB). Combined inventory exceeds 4,000 units across all variants.

Compliance and Regulatory Considerations:

All substitute parts maintain RoHS compliance (RoHS or ROHS3 status). Texas Instruments parts carry REACH Unaffected certification. NXP part carries REACH Unaffected certification. Selection should prioritize Active product status parts (all substitutes listed) over Last Time Buy status of the original part to ensure long-term supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can TL16C752CIRHBR or TL16C752CRHBR be used as direct drop-in replacements for XR68M752IL32-F?

A: Yes, both TL16C752CIRHBR and TL16C752CRHBR are direct pin-compatible replacements. They maintain identical 32-VFQFN package geometry, 64-byte FIFO capacity, dual-channel DUART architecture, and all required control features (auto flow control, false start bit detection, modem control). Voltage supply range is broader (1.62V ~ 5.5V vs. 1.62V ~ 3.63V), ensuring compatibility with the original design operating voltage. No PCB layout modifications are required.

Q: What is the impact of using a 16-byte FIFO substitute instead of the original 64-byte FIFO?

A: The 16-byte FIFO reduces buffering capacity by 75%, requiring either reduced data throughput or external buffering implementation at the system level. For applications operating below 1.5 Mbps, the reduced FIFO depth may be acceptable with proper interrupt handling. For applications requiring sustained high-speed serial communication, 16-byte FIFO alternatives are not suitable without architectural modifications.

Q: Are all substitute parts RoHS compliant?

A: Yes. The original XR68M752IL32-F is RoHS Compliant. All substitute parts listed are either RoHS Compliant or ROHS3 Compliant, meeting current environmental regulations. ROHS3 represents the current regulatory standard and provides equivalent environmental compliance.

Q: Which substitute part has the best long-term availability?

A: All substitute parts listed carry Active product status, indicating ongoing manufacturer support. TL16C752CIRHBR (Texas Instruments) has the highest inventory level at 34,897 units, providing the strongest supply assurance. Texas Instruments and NXP USA Inc. are established manufacturers with established long-term product support commitments.

Q: Can SC16C752BIBS,157 be used if the application requires 16 Mbps data rate?

A: No. SC16C752BIBS,157 has a maximum data rate specification of 5 Mbps, which is insufficient for applications requiring 16 Mbps operation. For 16 Mbps requirement, use XR16V2550IL-F (16 Mbps) or TL16C752CIRHBR/TL16C752CRHBR (3 Mbps maximum, but with 64-byte FIFO). TL16C2550 variants are limited to 1.5 Mbps and are unsuitable for this requirement.

Q: What is the difference between TL16C2550IRHB, TL16C2550IRHBR, TL16C2550RHB, and TL16C2550RHBR?

A: These four parts are functionally identical (16-byte FIFO, 1.5 Mbps maximum data rate, 1.8V ~ 5V supply range) and differ only in packaging format: IRHB (unspecified packaging), IRHBR (Tape & Reel), RHB (Tray), and RHBR (Tape & Reel). Selection should be based on assembly process requirements and inventory availability. All four variants are in Active product status with equivalent technical specifications.

Q: Is the IrDA Encoder/Decoder feature critical for substitution?

A: The original XR68M752IL32-F includes IrDA Encoder/Decoder functionality. TL16C752CIRHBR and TL16C752CRHBR maintain this feature. XR16V2550IL-F also includes IrDA support. TL16C2550 variants and SC16C752BIBS,157 do not include IrDA functionality. If IrDA is required by the application, substitute selection must be limited to parts explicitly listing IrDA Encoder/Decoder support.

Q: What is the MSL (Moisture Sensitivity Level) difference, and does it matter?

A: The original part has MSL 2 (1 Year); SC16C752BIBS,157 has MSL 1 (Unlimited); TL16C752CIRHBR and TL16C752CRHBR have MSL 3 (168 Hours); TL16C2550 variants have MSL 2 (1 Year). Lower MSL numbers indicate greater moisture tolerance. For applications with extended storage or high-humidity environments, SC16C752BIBS,157 (MSL 1) provides superior moisture protection. For standard manufacturing environments, MSL 2 and MSL 3 are functionally equivalent with proper handling procedures.

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