MAX222EPN RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The MAX222EPN is a 2/2 full-duplex RS232 transceiver manufactured by Analog Devices Inc./Maxim Integrated, housed in an 18-pin DIP package. This component is classified as obsolete, indicating that direct procurement may face supply constraints. The part operates within the 4.5V to 5.5V supply voltage range and supports data rates up to 250 kbps across industrial and commercial temperature ranges. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and access components with active product status and current compliance certifications.

Substiute Parts

MAX222EPN

Analog Devices Inc./Maxim IntegratedIn Stock: 815MAX222EPN Datasheet

Current PartRFQ

ADM222ANZ

Analog Devices Inc.In Stock: 2268ADM222ANZ Datasheet

MFR RecommendedRFQ

LT1780CN#PBF

Linear TechnologyIn Stock: 1131LT1780CN#PBF Datasheet

MFR RecommendedRFQ

LT1780IN#PBF

Analog Devices Inc.In Stock: 1106LT1780IN#PBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for RS232 transceiver components is determined by strict alignment of the following parameters:

• Protocol Compatibility: All substitute parts must implement RS232 protocol
• Driver/Receiver Configuration: 2/2 full-duplex architecture is mandatory
• Package Compatibility: 18-DIP form factor with 0.300" (7.62mm) pitch
• Electrical Specifications: Supply voltage range 4.5V ~ 5.5V and data rate capability
• Mounting Type: Through-hole mounting required for PCB compatibility
• Receiver Hysteresis: 400 mV to 500 mV acceptable range
• Operating Temperature Range: Must support minimum -40°C to 85°C or equivalent industrial range

The three substitute parts listed below meet these core substitution criteria and are classified as active products with current availability.

Parameter Comparison

Engineering Selection Recommendations

ADM222ANZ is the primary recommended substitute. It is manufactured by Analog Devices Inc., maintains active product status, and carries ROHS3 compliance certification. The operating temperature range (-40°C to 85°C) matches the original specification. The data rate specification of 200 kbps is lower than the MAX222EPN's 250 kbps; however, this does not preclude substitution in applications operating below this threshold. Receiver hysteresis is 400 mV versus the original 500 mV, which remains within acceptable RS232 transceiver tolerances.

LT1780IN#PBF is a secondary recommended substitute. Manufactured by Analog Devices Inc., it maintains active product status and ROHS3 compliance. The operating temperature range (-40°C to 85°C) and data rate (250 kbps) are identical to the original specification. This part provides the closest electrical performance match to the MAX222EPN.

LT1780CN#PBF is a tertiary option. Manufactured by Linear Technology, it is active and supports the full 250 kbps data rate. However, the operating temperature range (0°C to 70°C) is narrower than the original specification and may not be suitable for applications requiring the full -40°C to 85°C industrial temperature range.

All three substitute parts share identical package geometry, mounting type, and supply voltage specifications with the MAX222EPN, ensuring direct PCB compatibility without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can ADM222ANZ replace MAX222EPN in all applications? A: ADM222ANZ is electrically compatible for applications operating at data rates up to 200 kbps. If your design requires the full 250 kbps capability, LT1780IN#PBF is the preferred substitute. Both parts maintain identical supply voltage and operating temperature ranges.

Q: What is the difference between LT1780CN#PBF and LT1780IN#PBF? A: Both parts are manufactured by Linear Technology and support 250 kbps data rates. The primary difference is operating temperature range: LT1780CN#PBF operates from 0°C to 70°C, while LT1780IN#PBF operates from -40°C to 85°C. Select based on your application's temperature requirements.

Q: Are all substitute parts pin-compatible with MAX222EPN? A: Yes. All substitute parts use the 18-DIP package with 0.300" (7.62mm) pitch, ensuring direct pin-for-pin compatibility without PCB modifications.

Q: Do the substitute parts meet current compliance standards? A: ADM222ANZ and LT1780IN#PBF are ROHS3 compliant. The original MAX222EPN is RoHS non-compliant. If RoHS compliance is required for your application, select either ADM222ANZ or LT1780IN#PBF.

Q: What is the impact of different receiver hysteresis values? A: The MAX222EPN specifies 500 mV hysteresis, while all substitute parts specify 400 mV. This difference is within normal RS232 transceiver tolerances and does not affect functional compatibility in standard applications.

Q: Which substitute part offers the best long-term availability? A: ADM222ANZ and LT1780IN#PBF both carry active product status from major manufacturers (Analog Devices Inc.), indicating ongoing production and supply availability. LT1780CN#PBF is also active but has a narrower operating temperature range.