SP3232EEP-L RS232 Transceiver: Equivalent & Substitute Parts

Part Overview

The SP3232EEP-L is a 2/2 full-duplex RS232 transceiver manufactured by MaxLinear, Inc., housed in a 16-pin DIP package for through-hole mounting. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production support. The part operates across a 3V to 5.5V supply range with a 235 kbps data rate and 300 mV receiver hysteresis, designed for industrial and legacy communication applications requiring RS232 protocol compliance.

Key Parameters

Parameter	SP3232EEP-L Value
Manufacturer	MaxLinear, Inc.
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	2/2
Duplex	Full
Receiver Hysteresis	300 mV
Data Rate	235 Kbps
Voltage - Supply	3V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Mounting Type	Through Hole
Package / Case	16-DIP (0.300", 7.62mm)
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the SP3232EEP-L is determined by the following critical parameters:

Primary Substitution Criteria:

RS232 protocol compliance
2/2 driver/receiver configuration
Full-duplex operation
16-pin DIP package (through-hole mounting)
Supply voltage range compatibility (minimum 3V to 5.5V support)
Operating temperature range (-40°C to 85°C preferred for industrial applications)

Secondary Compatibility Factors:

Receiver hysteresis tolerance (300 mV nominal, with acceptable range 300-650 mV)
Data rate performance (minimum 200 kbps for RS232 applications)
RoHS3 compliance and REACH status for regulatory alignment
Moisture sensitivity level (MSL 1 preferred for unlimited shelf life)

Substitute parts are grouped into two categories: direct pin-compatible replacements in 16-DIP through-hole packages, and surface-mount alternatives for design flexibility. All listed substitutes maintain functional equivalence for RS232 serial communication applications.

Parameter Comparison

Part Number	Manufacturer	Package	Mounting	Supply Voltage	Operating Temp	Data Rate	Receiver Hysteresis	Product Status	RoHS Status
SP3232EEP-L	MaxLinear, Inc.	16-DIP	Through Hole	3V ~ 5.5V	-40°C ~ 85°C	235 Kbps	300 mV	Obsolete	Not specified
SP3232EEN-L/TR	MaxLinear, Inc.	16-SOIC	Surface Mount	3V ~ 5.5V	-40°C ~ 85°C	235 Kbps	300 mV	Active	ROHS3 Compliant
ADM202EANZ	Analog Devices Inc.	16-DIP	Through Hole	4.5V ~ 5.5V	-40°C ~ 85°C	230 kbps	650 mV	Active	ROHS3 Compliant
ADM202JNZ	Analog Devices Inc.	16-DIP	Through Hole	4.5V ~ 5.5V	0°C ~ 70°C	Not specified	400 mV	Active	ROHS3 Compliant
ADM232AANZ	Analog Devices Inc.	16-DIP	Through Hole	4.5V ~ 5.5V	-40°C ~ 85°C	200 kbps	400 mV	Active	ROHS3 Compliant
ADM232LANZ	Analog Devices Inc.	16-DIP	Through Hole	4.5V ~ 5.5V	-40°C ~ 85°C	120 Kbps	650 mV	Active	ROHS3 Compliant
ADM232LJNZ	Analog Devices Inc.	16-DIP	Through Hole	4.5V ~ 5.5V	0°C ~ 70°C	120 Kbps	650 mV	Active	ROHS3 Compliant
ADM3202ANZ	Analog Devices Inc.	16-DIP	Through Hole	3V ~ 5.5V	-40°C ~ 85°C	460 Kbps	400 mV	Active	ROHS3 Compliant
ICL3232CPZ	Renesas Electronics Corporation	16-DIP	Through Hole	3V ~ 5.5V	0°C ~ 70°C	250 kbps	300 mV	Active	ROHS3 Compliant
LT1081CN#PBF	Analog Devices Inc.	16-DIP	Through Hole	4.5V ~ 5.5V	0°C ~ 70°C	250 KBd	400 mV	Active	ROHS3 Compliant
LT1081IN#PBF	Analog Devices Inc.	16-DIP	Through Hole	4.5V ~ 5.5V	-40°C ~ 85°C	250 KBd	400 mV	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Through-Hole Applications (Direct Pin-Compatible Replacement):

ADM3202ANZ is the optimal substitute for through-hole designs requiring full industrial temperature range (-40°C to 85°C) with extended supply voltage compatibility (3V to 5.5V). This part matches the original supply voltage envelope and operating temperature specification while offering superior data rate performance (460 Kbps). All Analog Devices substitutes carry ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for new production.

ICL3232CPZ from Renesas Electronics provides an alternative with matching receiver hysteresis (300 mV) and supply voltage range, though operating temperature is limited to 0°C to 70°C. This part is suitable for commercial-grade applications where the extended low-temperature specification is not required.

LT1081IN#PBF supports the full industrial temperature range (-40°C to 85°C) with 250 KBd data rate, but supply voltage is restricted to 4.5V to 5.5V, requiring circuit verification if 3V operation is necessary.

For Surface-Mount Applications:

SP3232EEN-L/TR is the manufacturer-recommended upgrade path, maintaining identical electrical specifications (3V to 5.5V, -40°C to 85°C, 235 Kbps, 300 mV hysteresis) in a 16-SOIC surface-mount package. This part is active and ROHS3 compliant, providing direct functional equivalence with modern packaging.

Product Status Consideration:

All recommended substitutes carry active product status with ROHS3 compliance, ensuring long-term availability and regulatory support. The original SP3232EEP-L obsolete status necessitates migration to one of these active alternatives for new designs and production continuity.

Frequently Asked Questions (FAQ)

Q: Can I use ADM202EANZ as a direct replacement for SP3232EEP-L in existing designs?

A: ADM202EANZ is pin-compatible in the 16-DIP through-hole package and maintains 2/2 full-duplex RS232 functionality. However, the supply voltage range is restricted to 4.5V to 5.5V (versus 3V to 5.5V for the original), and receiver hysteresis is 650 mV instead of 300 mV. Circuit verification is required if 3V operation or tighter hysteresis tolerance is specified.

Q: What is the difference between ADM232AANZ and ADM232LANZ?

A: Both parts are 16-DIP through-hole packages with identical supply voltage (4.5V to 5.5V) and operating temperature range (-40°C to 85°C). The primary difference is data rate: ADM232AANZ supports 200 kbps with 400 mV hysteresis, while ADM232LANZ supports 120 kbps with 650 mV hysteresis. Select based on required communication speed.

Q: Why would I choose SP3232EEN-L/TR over a through-hole substitute?

A: SP3232EEN-L/TR is the direct manufacturer equivalent in surface-mount form factor (16-SOIC). It maintains identical electrical specifications and is the recommended upgrade for new PCB designs prioritizing compact layout and automated assembly. Through-hole alternatives are appropriate only when existing board designs require DIP packages.

Q: Is ADM3202ANZ compatible with 3V supply applications?

A: Yes. ADM3202ANZ supports the full 3V to 5.5V supply range, matching the original SP3232EEP-L specification. It also provides superior data rate performance (460 Kbps) and full industrial temperature range (-40°C to 85°C), making it suitable for low-voltage and high-speed RS232 applications.

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

A: Receiver hysteresis determines the voltage differential required to switch logic states, affecting noise immunity and signal integrity. The original SP3232EEP-L specifies 300 mV. Substitutes with higher hysteresis (400-650 mV) provide greater noise immunity but may reduce sensitivity to weak signals. Circuit design and signal quality should guide selection.

Q: Are all listed substitutes RoHS3 compliant?

A: Yes. All active substitute parts listed carry ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements for commercial and industrial applications.

Q: Can I use ICL3232CPZ in applications requiring -40°C operation?

A: No. ICL3232CPZ operating temperature range is 0°C to 70°C, which does not support the extended low-temperature specification of the original part. Use ADM3202ANZ, ADM232AANZ, or LT1081IN#PBF for full -40°C to 85°C industrial temperature range.

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