SP3232ECP-L Equivalent & Substitute Parts

Part Overview

The SP3232ECP-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 interface IC operates across a 3V to 5.5V supply range with a data rate of 235 Kbps and receiver hysteresis of 300 mV. The part is currently classified as obsolete, making equivalent substitutes necessary for ongoing system support and new designs requiring RS232 interface functionality.

Key Parameters

Parameter	SP3232ECP-L
Manufacturer	MaxLinear, Inc.
Type	Transceiver
Protocol	RS232
Drivers/Receivers	2/2
Duplex	Full
Receiver Hysteresis	300 mV
Data Rate	235 Kbps
Voltage Supply	3V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Mounting Type	Through Hole
Package	16-DIP (0.300", 7.62mm)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the SP3232ECP-L is determined by the following critical parameters:

Protocol: RS232 (all substitutes must support RS232)
Configuration: 2/2 drivers/receivers, full-duplex operation
Package: 16-DIP through-hole mounting (primary group) or 16-SSOP surface mount (alternative form factor)
Voltage Supply Range: 3V ~ 5.5V compatibility preferred; 4.5V ~ 5.5V acceptable with design verification
Data Rate: Minimum 235 Kbps required; higher rates provide margin
Receiver Hysteresis: 300 mV to 650 mV acceptable range
Operating Temperature: 0°C ~ 70°C minimum; extended range (-40°C ~ 85°C) provides additional margin

Substitutes are grouped into two categories: direct pin-compatible through-hole replacements and surface-mount alternatives for board redesign scenarios.

Parameter Comparison

Part Number	Manufacturer	Package	Mounting	Voltage Supply	Data Rate	Receiver Hysteresis	Operating Temp	Product Status
SP3232ECP-L	MaxLinear, Inc.	16-DIP	Through Hole	3V ~ 5.5V	235 Kbps	300 mV	0°C ~ 70°C	Obsolete
SP3232ECA-L/TR	MaxLinear, Inc.	16-SSOP	Surface Mount	3V ~ 5.5V	235 Kbps	300 mV	0°C ~ 70°C	Active
ADM202EANZ	Analog Devices Inc.	16-DIP	Through Hole	4.5V ~ 5.5V	230 Kbps	650 mV	-40°C ~ 85°C	Active
ADM202JNZ	Analog Devices Inc.	16-DIP	Through Hole	4.5V ~ 5.5V	—	400 mV	0°C ~ 70°C	Active
ADM232AANZ	Analog Devices Inc.	16-DIP	Through Hole	4.5V ~ 5.5V	200 Kbps	400 mV	-40°C ~ 85°C	Active
ADM232LANZ	Analog Devices Inc.	16-DIP	Through Hole	4.5V ~ 5.5V	120 Kbps	650 mV	-40°C ~ 85°C	Active
ADM232LJNZ	Analog Devices Inc.	16-DIP	Through Hole	4.5V ~ 5.5V	120 Kbps	650 mV	0°C ~ 70°C	Active
ADM3202ANZ	Analog Devices Inc.	16-DIP	Through Hole	3V ~ 5.5V	460 Kbps	400 mV	-40°C ~ 85°C	Active
ICL3232CPZ	Renesas Electronics Corporation	16-DIP	Through Hole	3V ~ 5.5V	250 Kbps	300 mV	0°C ~ 70°C	Active
LT1081CN#PBF	Analog Devices Inc.	16-DIP	Through Hole	4.5V ~ 5.5V	250 KBd	400 mV	0°C ~ 70°C	Active
LT1081IN#PBF	Analog Devices Inc.	16-DIP	Through Hole	4.5V ~ 5.5V	250 KBd	400 mV	-40°C ~ 85°C	Active

Engineering Selection Recommendations

For direct through-hole replacement with identical electrical specifications, ICL3232CPZ from Renesas Electronics Corporation provides the closest match: 16-DIP package, 3V ~ 5.5V supply range, 250 Kbps data rate, 300 mV receiver hysteresis, and 0°C ~ 70°C operating temperature. This part is ROHS3 compliant and carries active product status.

For applications requiring extended temperature range (-40°C ~ 85°C), ADM3202ANZ from Analog Devices Inc. offers full compatibility with the original 3V ~ 5.5V supply specification while delivering higher data rate performance (460 Kbps). This part is ROHS3 compliant and active.

For board redesign scenarios permitting surface-mount conversion, SP3232ECA-L/TR maintains MaxLinear lineage with identical electrical parameters in 16-SSOP packaging. This part is ROHS3 compliant and active.

All recommended substitutes carry ROHS3 compliance and REACH unaffected status, matching the regulatory profile of the original part.

Frequently Asked Questions (FAQ)

Q: Can I use ADM202EANZ as a direct replacement for SP3232ECP-L?

A: ADM202EANZ is pin-compatible in 16-DIP through-hole packaging and supports 2/2 full-duplex RS232 operation. However, it operates within 4.5V ~ 5.5V supply range, narrower than the original 3V ~ 5.5V specification. If your design operates at 3V, this part is not suitable. Data rate (230 Kbps) and receiver hysteresis (650 mV) differ from the original but remain within acceptable RS232 transceiver parameters.

Q: What is the difference between ADM232AANZ and ADM232LANZ?

A: Both are 16-DIP through-hole RS232 transceivers from Analog Devices Inc. with identical 4.5V ~ 5.5V supply and 650 mV receiver hysteresis. ADM232AANZ operates at 200 Kbps across -40°C ~ 85°C. ADM232LANZ operates at 120 Kbps across -40°C ~ 85°C. Selection depends on required data rate and temperature range for your application.

Q: Is SP3232ECA-L/TR a suitable alternative if I can modify my PCB layout?

A: Yes. SP3232ECA-L/TR is the active surface-mount equivalent from MaxLinear, Inc., with identical electrical specifications (3V ~ 5.5V, 235 Kbps, 300 mV hysteresis, 0°C ~ 70°C). It requires 16-SSOP footprint instead of 16-DIP. This option maintains manufacturer continuity and eliminates obsolescence risk.

Q: Why does ICL3232CPZ have a higher data rate (250 Kbps) than the original SP3232ECP-L (235 Kbps)?

A: Higher data rate capability does not affect compatibility. ICL3232CPZ from Renesas Electronics Corporation meets or exceeds all original specifications: 16-DIP package, 3V ~ 5.5V supply, 300 mV receiver hysteresis, and 0°C ~ 70°C operating temperature. The additional bandwidth margin provides design flexibility without requiring circuit modification.

Q: Can I use LT1081IN#PBF instead of LT1081CN#PBF?

A: Both are 16-DIP through-hole RS232 transceivers from Analog Devices Inc. with identical 4.5V ~ 5.5V supply, 250 KBd data rate, and 400 mV receiver hysteresis. LT1081CN#PBF operates 0°C ~ 70°C. LT1081IN#PBF operates -40°C ~ 85°C. Selection depends on your application's temperature requirements.

Q: Does ADM3202ANZ work with 3V supply like the original SP3232ECP-L?

A: Yes. ADM3202ANZ operates across 3V ~ 5.5V supply range, matching the original specification. It also provides higher data rate (460 Kbps) and extended temperature range (-40°C ~ 85°C), making it suitable for demanding applications while maintaining backward compatibility with 3V systems.

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