SP233AEP-L Equivalent & Substitute Parts

Part Overview

The SP233AEP-L is a 2/2 full-duplex RS232 transceiver manufactured by MaxLinear, Inc., housed in a 20-DIP package. This interface component operates across a 4.5V to 5.5V supply range with a maximum data rate of 240 kbps and supports operating temperatures from -40°C to 85°C. The part is currently classified as obsolete, necessitating identification of active equivalent and substitute components that maintain functional compatibility for RS232 communication applications.

Key Parameters

Parameter	SP233AEP-L
Manufacturer	MaxLinear, Inc.
Type	Transceiver
Protocol	RS232
Drivers/Receivers	2/2
Duplex	Full
Receiver Hysteresis	500 mV
Data Rate	240 kbps
Voltage Supply	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Mounting Type	Through Hole
Package	20-DIP (0.300", 7.62mm)
Moisture Sensitivity Level	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the SP233AEP-L is determined by the following critical parameters:

Protocol Compatibility: RS232 full-duplex transceiver with 2/2 driver/receiver configuration
Package Compatibility: 20-DIP (0.300", 7.62mm) through-hole mounting
Electrical Specifications: Supply voltage range, receiver hysteresis, and data rate capability
Operating Temperature Range: Extended temperature support (-40°C to 85°C) for industrial applications

Substitute parts are grouped into two categories based on operating temperature specifications:

Category A - Extended Temperature Range (-40°C to 85°C): MAX203EEPP+G36, MAX203EPP+G36, MAX233AEPP+G36, MAX233EPP+G36, ADM233LANZ

Category B - Commercial Temperature Range (0°C to 70°C): ADM233LJNZ, MAX203CPP+G36, MAX203ECPP+G36, MAX233ACPP+G36, MAX233CPP+G36

All substitute parts maintain the 20-DIP package format, 2/2 transceiver configuration, and RS232 protocol compliance. Data rate specifications for substitutes are rated at 120 kbps, which is within the operational envelope of the original 240 kbps specification.

Parameter Comparison

Part Number	Manufacturer	Drivers/Receivers	Protocol	Receiver Hysteresis	Data Rate	Voltage Supply	Operating Temperature	Package	Product Status	RoHS Status
SP233AEP-L	MaxLinear, Inc.	2/2	RS232	500 mV	240 kbps	4.5V ~ 5.5V	-40°C ~ 85°C	20-DIP	Obsolete	N/A
ADM233LANZ	Analog Devices Inc.	2/2	RS232	650 mV	120 kbps	4.75V ~ 5.25V	-40°C ~ 85°C	20-DIP	Active	ROHS3 Compliant
ADM233LJNZ	Analog Devices Inc.	2/2	RS232	650 mV	120 kbps	4.75V ~ 5.25V	0°C ~ 70°C	20-DIP	Active	ROHS3 Compliant
MAX203CPP+G36	Analog Devices Inc./Maxim Integrated	2/2	RS232	500 mV	120 kbps	4.75V ~ 5.25V	0°C ~ 70°C	20-DIP	Active	ROHS3 Compliant
MAX203ECPP+G36	Analog Devices Inc./Maxim Integrated	2/2	RS232	500 mV	120 kbps	4.75V ~ 5.25V	0°C ~ 70°C	20-DIP	Active	ROHS3 Compliant
MAX203EEPP+G36	Analog Devices Inc./Maxim Integrated	2/2	RS232	500 mV	120 kbps	4.75V ~ 5.25V	-40°C ~ 85°C	20-DIP	Active	ROHS3 Compliant
MAX203EPP+G36	Analog Devices Inc./Maxim Integrated	2/2	RS232	500 mV	120 kbps	4.75V ~ 5.25V	-40°C ~ 85°C	20-DIP	Active	ROHS3 Compliant
MAX233ACPP+G36	Analog Devices Inc./Maxim Integrated	2/2	RS232	500 mV	120 kbps	4.75V ~ 5.25V	0°C ~ 70°C	20-DIP	Active	ROHS3 Compliant
MAX233AEPP+G36	Analog Devices Inc./Maxim Integrated	2/2	RS232	500 mV	120 kbps	4.75V ~ 5.25V	-40°C ~ 85°C	20-DIP	Active	ROHS3 Compliant
MAX233CPP+G36	Analog Devices Inc./Maxim Integrated	2/2	RS232	500 mV	120 kbps	4.75V ~ 5.25V	0°C ~ 70°C	20-DIP	Active	ROHS3 Compliant
MAX233EPP+G36	Analog Devices Inc./Maxim Integrated	2/2	RS232	500 mV	120 kbps	4.75V ~ 5.25V	-40°C ~ 85°C	20-DIP	Active	ROHS3 Compliant

Engineering Selection Recommendations

All listed substitute parts are active components with ROHS3 compliance and REACH unaffected status, providing regulatory alignment for modern manufacturing environments.

For applications requiring extended operating temperature support (-40°C to 85°C), select from: MAX203EEPP+G36, MAX203EPP+G36, MAX233AEPP+G36, MAX233EPP+G36, or ADM233LANZ. These parts maintain the full industrial temperature range of the original SP233AEP-L.

For commercial-grade applications operating within 0°C to 70°C, the following parts are suitable: ADM233LJNZ, MAX203CPP+G36, MAX203ECPP+G36, MAX233ACPP+G36, or MAX233CPP+G36.

Parts with 500 mV receiver hysteresis (MAX203 and MAX233 series) provide identical noise immunity to the original SP233AEP-L. The ADM233 series operates with 650 mV hysteresis, offering enhanced noise margin in electrically noisy environments.

All substitute parts maintain the 20-DIP package format and through-hole mounting compatibility, enabling direct board-level replacement without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can MAX203 and MAX233 series parts be used interchangeably with SP233AEP-L?

A: Yes, within the constraints of operating temperature requirements. Both MAX203 and MAX233 series maintain 2/2 RS232 transceiver configuration, 20-DIP packaging, and 500 mV receiver hysteresis matching the original part. Select based on your application's temperature range.

Q: What is the difference between ADM233LANZ and ADM233LJNZ?

A: Both are Analog Devices RS232 transceivers in 20-DIP packages with identical electrical specifications. The primary difference is operating temperature: ADM233LANZ supports -40°C to 85°C, while ADM233LJNZ is rated for 0°C to 70°C commercial range.

Q: Does the 120 kbps data rate of substitutes affect compatibility with SP233AEP-L applications?

A: The original SP233AEP-L is rated at 240 kbps, while all active substitutes are rated at 120 kbps. For applications operating at or below 120 kbps, substitutes provide full functional compatibility. Applications requiring higher data rates should evaluate the specified maximum rates against system requirements.

Q: Are all substitute parts RoHS compliant?

A: Yes, all listed substitute parts carry ROHS3 compliance certification and REACH unaffected status, meeting current environmental and regulatory requirements.

Q: Can I use a commercial temperature range part (0°C to 70°C) in an industrial application requiring -40°C to 85°C operation?

A: No. Commercial temperature range parts are not specified for operation outside 0°C to 70°C. For industrial applications requiring extended temperature support, use parts explicitly rated for -40°C to 85°C: MAX203EEPP+G36, MAX203EPP+G36, MAX233AEPP+G36, MAX233EPP+G36, or ADM233LANZ.

Q: What is the significance of receiver hysteresis in RS232 transceiver selection?

A: Receiver hysteresis determines the voltage differential required for input switching, affecting noise immunity. The original SP233AEP-L and most MAX203/MAX233 substitutes operate at 500 mV hysteresis. ADM233 parts operate at 650 mV, providing enhanced noise rejection in electrically noisy environments at the cost of slightly reduced sensitivity.

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