DS21354L Equivalent & Substitute Parts

Part Overview

The DS21354L is a telecom interface IC functioning as a single-chip transceiver with E1 and HDLC interface support in a 100-LQFP surface mount package. This component is classified as obsolete, making identification of suitable substitutes essential for ongoing system maintenance and new design implementations. The part operates within a 3.14V to 3.47V supply voltage range and is designed for telecommunications applications requiring integrated transceiver functionality.

Substiute Parts

DS21354L

Analog Devices Inc./Maxim IntegratedIn Stock: 2357DS21354L Datasheet

Current PartRFQ

DS21354L+

Analog Devices Inc./Maxim IntegratedIn Stock: 1542DS21354L+ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DS21354L is determined by strict alignment across the following critical parameters:

• Interface Compatibility: E1 and HDLC interface support
• Electrical Specifications: Supply voltage range 3.14V ~ 3.47V and supply current 75mA
• Package Specification: 100-LQFP (14x14) surface mount configuration
• Functional Equivalence: Single-chip transceiver architecture with identical circuit count (1)
• Operating Temperature Range: 0°C ~ 70°C
• Moisture Sensitivity: MSL 3 (168 Hours)

The DS21354L+ qualifies as a direct substitute based on complete alignment with all electrical, mechanical, and functional parameters. The primary distinction lies in product status and compliance certifications rather than technical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The DS21354L+ serves as the direct functional equivalent to the DS21354L. Selection between these parts should be based on the following criteria:

For Obsolete Component Replacement: The DS21354L+ is the appropriate choice, as it maintains active product status with full manufacturing support and availability.

For Regulatory Compliance: The DS21354L+ provides ROHS3 compliance, whereas the original DS21354L is RoHS non-compliant. Systems subject to RoHS requirements must utilize the DS21354L+.

For New Designs: The DS21354L+ is the standard selection due to its active status and compliance certifications.

For Legacy System Maintenance: The DS21354L remains functionally equivalent where RoHS compliance is not mandated and existing inventory is available.

Both parts share identical electrical performance, interface specifications, and thermal characteristics, ensuring direct substitution without circuit redesign.

Frequently Asked Questions (FAQ)

Q: Can the DS21354L+ directly replace the DS21354L in existing designs?

A: Yes. The DS21354L+ is electrically and functionally identical to the DS21354L. Both parts operate at 3.14V ~ 3.47V supply voltage, support E1 and HDLC interfaces, and are packaged in 100-LQFP (14x14) surface mount configuration. No circuit modifications are required.

Q: What is the primary difference between DS21354L and DS21354L+?

A: The DS21354L+ is the active production variant with ROHS3 compliance, while the DS21354L is classified as obsolete and RoHS non-compliant. Both parts are manufactured by Analog Devices Inc./Maxim Integrated and share identical technical specifications.

Q: Are there packaging differences between these parts?

A: Both parts use the same 100-LQFP (14x14) surface mount package. The DS21354L is supplied in standard packaging, while the DS21354L+ is supplied in Tray packaging. The physical component dimensions and pin configuration are identical.

Q: Which part should be selected for new product designs?

A: The DS21354L+ should be selected for new designs. It offers active product status, full manufacturer support, and ROHS3 compliance, ensuring long-term availability and regulatory alignment.

Q: Is the moisture sensitivity level identical between both parts?

A: Yes. Both the DS21354L and DS21354L+ have MSL 3 (168 Hours) rating, requiring identical handling and storage protocols.