ADM237LAN Equivalent & Substitute Parts

Part Overview

The ADM237LAN is a full-duplex RS232 transceiver with 5 drivers and 3 receivers, housed in a 24-pin DIP package. This interface component is designed for serial communication applications requiring bidirectional data transmission. The ADM237LAN is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support, maintenance, and new design implementations where legacy compatibility is required.

Substiute Parts

ADM237LAN

Analog Devices Inc.In Stock: 1065ADM237LAN Datasheet

Current PartRFQ

MAX237CNG+

Analog Devices Inc./Maxim IntegratedIn Stock: 1003MAX237CNG+ Datasheet

SimilarRFQ

MAX237ENG+

Analog Devices Inc./Maxim IntegratedIn Stock: 1119MAX237ENG+ Datasheet

SimilarRFQ

ADM237LANZ

Analog Devices Inc.In Stock: 907ADM237LANZ Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the ADM237LAN is determined by strict adherence to the following electrical and mechanical parameters:

Critical Substitution Parameters:

• Protocol: RS232
• Number of Drivers/Receivers: 5/3
• Duplex: Full
• Data Rate: 120 Kbps
• Package / Case: 24-DIP (0.300", 7.62mm)
• Mounting Type: Through Hole
• Moisture Sensitivity Level: 1 (Unlimited)

Allowable Parameter Variations:

• Receiver Hysteresis: 500 mV to 650 mV (within acceptable RS232 specification range)
• Voltage - Supply: 4.5V ~ 5.5V (encompasses the original 4.75V ~ 5.25V range)
• Operating Temperature: Extended ranges acceptable if minimum meets or exceeds -40°C and maximum meets or exceeds 85°C

Substitute Parts Identified:

1. ADM237LANZ - Parametric equivalent with identical electrical specifications and extended product support
2. MAX237CNG+ - Functional substitute with relaxed receiver hysteresis and expanded supply voltage range
3. MAX237ENG+ - Functional substitute with relaxed receiver hysteresis, expanded supply voltage range, and extended operating temperature coverage

Parameter Comparison

Engineering Selection Recommendations

ADM237LANZ is the primary equivalent for direct replacement of the obsolete ADM237LAN. This part maintains identical electrical specifications, including receiver hysteresis and supply voltage range, while offering active product status and current manufacturing support. RoHS3 compliance and REACH unaffected status provide regulatory alignment for new designs and system upgrades.

MAX237CNG+ and MAX237ENG+ are functional substitutes suitable for applications where the relaxed receiver hysteresis specification (500 mV versus 650 mV) is acceptable. The expanded supply voltage range (4.5V ~ 5.5V) provides additional design flexibility. MAX237ENG+ is preferred over MAX237CNG+ for applications requiring extended operating temperature coverage, as it maintains the full -40°C ~ 85°C range. Both MAX237 variants carry active product status and full compliance certifications.

Selection between ADM237LANZ and MAX237 variants depends on application-specific requirements for receiver hysteresis tolerance and operating temperature range. For legacy system maintenance requiring exact parameter matching, ADM237LANZ is the appropriate choice. For new designs or systems tolerant of relaxed hysteresis specifications, MAX237ENG+ offers superior long-term availability and compliance status.

Frequently Asked Questions (FAQ)

Q: Can MAX237CNG+ replace ADM237LAN in all applications?

A: MAX237CNG+ is functionally compatible for RS232 communication at 120 Kbps with 5/3 driver/receiver configuration. However, the operating temperature range is limited to 0°C ~ 70°C, which does not cover the full -40°C ~ 85°C specification of the ADM237LAN. Applications requiring extended temperature operation must use ADM237LANZ or MAX237ENG+.

Q: What is the difference between ADM237LANZ and MAX237ENG+?

A: ADM237LANZ maintains the original ADM237LAN specifications exactly, including 650 mV receiver hysteresis and 4.75V ~ 5.25V supply voltage range. MAX237ENG+ has relaxed receiver hysteresis (500 mV) and expanded supply voltage range (4.5V ~ 5.5V). Both support the full -40°C ~ 85°C operating temperature range. Selection depends on whether the application requires exact hysteresis matching or can tolerate the relaxed specification.

Q: Are all substitute parts pin-compatible with ADM237LAN?

A: All substitute parts use the 24-DIP (0.300", 7.62mm) package with identical pinout. Direct socket replacement is possible without PCB modification.

Q: Do the substitute parts have better compliance status than ADM237LAN?

A: ADM237LANZ, MAX237CNG+, and MAX237ENG+ all carry ROHS3 compliance and REACH unaffected status. The ADM237LAN compliance status is not specified. For applications requiring documented regulatory compliance, the substitute parts provide explicit certification.

Q: Which substitute part should be used for new designs?

A: MAX237ENG+ is recommended for new designs. It offers active product status, full compliance certifications, extended operating temperature range matching the original specification, and long-term manufacturing support from Analog Devices Inc./Maxim Integrated.