DS4550E Equivalent & Substitute Parts

Part Overview

The DS4550E is an I/O Expander interface component manufactured by Analog Devices Inc./Maxim Integrated. It provides 9 I/O channels with I2C and JTAG interface support at 400 kHz clock frequency, housed in a 20-TSSOP surface mount package. The DS4550E is classified as obsolete product status. Identifying equivalent substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications currently utilizing this component.

Substiute Parts

DS4550E

Analog Devices Inc./Maxim IntegratedIn Stock: 1482DS4550E Datasheet

Current PartRFQ

DS4550E+

Analog Devices Inc./Maxim IntegratedIn Stock: 1155DS4550E+ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DS4550E are identified based on electrical and mechanical parameter equivalence. The critical parameters determining substitution compatibility are:

• Number of I/O channels: 9
• Interface protocols: I2C and JTAG support
• Clock frequency: 400 kHz
• Voltage supply range: 2.7V ~ 5.5V
• Output type: Open Drain
• Current output capability: 16mA
• Package type: 20-TSSOP
• Operating temperature range: -40°C ~ 85°C

The DS4550E+ qualifies as a direct substitute, maintaining identical electrical specifications and mechanical packaging while offering improved product status and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The DS4550E+ is a direct electrical and mechanical equivalent to the DS4550E. Both parts share identical I/O count, interface protocols, clock frequency, voltage specifications, output characteristics, and thermal operating range. The primary distinction is product lifecycle status and regulatory compliance.

The DS4550E is classified as obsolete, presenting supply continuity risks. The DS4550E+ maintains active product status with current manufacturing availability. Additionally, the DS4550E+ achieves ROHS3 compliance and REACH unaffected status, whereas the DS4550E is RoHS non-compliant. For new designs or production continuity, the DS4550E+ is the appropriate selection based on active product status and regulatory compliance certifications.

Frequently Asked Questions (FAQ)

Q: Can DS4550E+ be used as a direct replacement for DS4550E in existing designs?

A: Yes. The DS4550E+ is electrically and mechanically equivalent. Both parts provide 9 I/O channels, I2C/JTAG interface support at 400 kHz, identical voltage supply range (2.7V ~ 5.5V), open drain output type with 16mA capability, and 20-TSSOP surface mount packaging. No circuit modifications are required.

Q: What is the primary reason to transition from DS4550E to DS4550E+?

A: The DS4550E is obsolete product status, creating supply chain risk. The DS4550E+ is active production status with current inventory availability. Additionally, DS4550E+ meets ROHS3 compliance and REACH unaffected requirements, whereas DS4550E is RoHS non-compliant.

Q: Are the package dimensions identical between DS4550E and DS4550E+?

A: Yes. Both parts use 20-TSSOP packaging with identical dimensions (0.173" width, 4.40mm). PCB footprints and assembly processes are interchangeable.

Q: What is the moisture sensitivity level for both parts?

A: Both DS4550E and DS4550E+ have Moisture Sensitivity Level 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: Are there any interface or protocol differences between the two parts?

A: No. Both parts support identical I2C and JTAG interface protocols with 400 kHz clock frequency. Firmware and software implementations require no modification.