SP3225ECY-L RS232 Transceiver: Equivalent & Substitute Parts

Part Overview

The SP3225ECY-L is a full-duplex RS232 transceiver manufactured by MaxLinear, Inc., configured with 2 drivers and 2 receivers in a 20-TSSOP surface mount package. This component operates across a 3V to 5.5V supply range with a 1Mbps data rate and 500mV receiver hysteresis. The part is currently obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and production continuity.

Key Parameters

Parameter	SP3225ECY-L Value
Manufacturer	MaxLinear, Inc.
Type	Transceiver
Protocol	RS232
Drivers/Receivers	2/2
Duplex	Full
Data Rate	1Mbps
Receiver Hysteresis	500mV
Voltage Supply	3V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Package/Case	20-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the SP3225ECY-L is determined by strict alignment of electrical and mechanical parameters. The primary substitution criteria are:

Full Electrical Equivalents (identical electrical specifications):

Receiver Hysteresis: 500mV
Data Rate: 1Mbps
Voltage Supply: 3V ~ 5.5V
Operating Temperature: 0°C ~ 70°C
Package: 20-TSSOP

Parts meeting all these criteria are direct replacements with no design modification required.

Parametric Equivalents (compatible but with parameter variations):

Receiver Hysteresis: 500mV
Data Rate: 1Mbps
Voltage Supply: 3V ~ 5.5V
Operating Temperature: 0°C ~ 70°C
Package: 20-TSSOP

These parts maintain core RS232 transceiver functionality and identical package form factor but may have different product status or manufacturer sourcing.

Limited Compatibility Alternatives (reduced electrical performance):

Receiver Hysteresis: 300mV
Data Rate: 460Kbps
Voltage Supply: 2.25V ~ 3V
Operating Temperature: 0°C ~ 70°C
Package: 20-TSSOP

These parts operate within a narrower voltage range and reduced data rate, suitable only for applications with relaxed performance requirements.

Parameter Comparison

Part Number	Manufacturer	Status	Packaging	Data Rate	Hysteresis	Voltage Supply	Temp Range	Inventory
SP3225ECY-L	MaxLinear, Inc.	Obsolete	—	1Mbps	500mV	3V ~ 5.5V	0°C ~ 70°C	4359 Pcs
MAX3225CUP+T	Analog Devices Inc./Maxim Integrated	Active	Tape & Reel (TR)	1Mbps	500mV	3V ~ 5.5V	0°C ~ 70°C	3735 Pcs
MAX3225EUP/V+	Analog Devices Inc./Maxim Integrated	Active	Tube	1Mbps	500mV	3V ~ 5.5V	-40°C ~ 85°C	969 Pcs
MAX3222ECUP+	Analog Devices Inc./Maxim Integrated	Active	Tube	1Mbps	500mV	3V ~ 5.5V	0°C ~ 70°C	22335 Pcs
MAX3225CUP+	Analog Devices Inc./Maxim Integrated	Active	Tube	1Mbps	500mV	3V ~ 5.5V	0°C ~ 70°C	4034 Pcs
MAX3225ECUP+	Analog Devices Inc./Maxim Integrated	Active	Tube	1Mbps	500mV	3V ~ 5.5V	0°C ~ 70°C	2000 Pcs
MAX3316ECUP+	Analog Devices Inc./Maxim Integrated	Active	Tube	460Kbps	300mV	2.25V ~ 3V	0°C ~ 70°C	1310 Pcs
MAX3318ECPW	Texas Instruments	Last Time Buy	Tube	460Kbps	300mV	2.25V ~ 3V	0°C ~ 70°C	970 Pcs
MAX3318ECPWR	Texas Instruments	Last Time Buy	Cut Tape (CT) & Digi-Reel®	460Kbps	300mV	2.25V ~ 3V	0°C ~ 70°C	3700 Pcs
MAX3318ECUP+	Analog Devices Inc./Maxim Integrated	Active	Tube	460Kbps	300mV	2.25V ~ 3V	0°C ~ 70°C	1214 Pcs
MAX3318ECUP+T	Analog Devices Inc./Maxim Integrated	Active	Tape & Reel (TR)	460Kbps	300mV	2.25V ~ 3V	0°C ~ 70°C	3800 Pcs

Engineering Selection Recommendations

Preferred Direct Replacements (Full Electrical Equivalents):

MAX3225CUP+T and MAX3225CUP+ are the primary substitutes for SP3225ECY-L. Both are manufactured by Analog Devices Inc./Maxim Integrated with Active product status, ensuring long-term availability and support. These parts maintain identical electrical specifications: 1Mbps data rate, 500mV receiver hysteresis, 3V to 5.5V supply range, and 0°C to 70°C operating temperature. MAX3225CUP+T is supplied in Tape & Reel packaging suitable for automated assembly, while MAX3225CUP+ is supplied in Tube packaging. Both are ROHS3 compliant and REACH unaffected.

MAX3225ECUP+ and MAX3222ECUP+ are additional parametric equivalents with identical electrical performance and Active status. MAX3225EUP/V+ extends the operating temperature range to -40°C to 85°C, providing enhanced thermal performance for applications requiring wider temperature operation.

Limited Compatibility Alternatives:

MAX3316ECUP+, MAX3318ECUP+, MAX3318ECUP+T, MAX3318ECPW, and MAX3318ECPWR operate with reduced electrical performance: 460Kbps data rate, 300mV receiver hysteresis, and 2.25V to 3V supply range. These parts are suitable only for applications with relaxed performance requirements and lower voltage operation. MAX3318 variants carry Last Time Buy status, indicating discontinued production with limited future availability.

Frequently Asked Questions (FAQ)

Q: Can MAX3318 series parts directly replace SP3225ECY-L?

A: No. MAX3318 parts operate at 460Kbps data rate versus 1Mbps for SP3225ECY-L, with reduced receiver hysteresis (300mV vs. 500mV) and narrower voltage supply range (2.25V ~ 3V vs. 3V ~ 5.5V). These parts are suitable only for applications with lower performance requirements.

Q: What is the difference between MAX3225CUP+T and MAX3225CUP+?

A: Both parts are electrically identical with identical specifications. The difference is packaging: MAX3225CUP+T is supplied in Tape & Reel format for automated assembly, while MAX3225CUP+ is supplied in Tube format for manual handling or lower-volume applications.

Q: Is MAX3225EUP/V+ compatible with SP3225ECY-L?

A: Yes, MAX3225EUP/V+ is electrically equivalent with identical data rate, hysteresis, and voltage supply specifications. The primary difference is an extended operating temperature range (-40°C to 85°C vs. 0°C to 70°C), which provides additional thermal margin for demanding applications.

Q: Are all substitute parts ROHS3 compliant?

A: All substitute parts listed are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What is the inventory status for substitute parts?

A: MAX3222ECUP+ has the highest inventory at 22,335 pieces. MAX3225CUP+T and MAX3225CUP+ have 3,735 and 4,034 pieces respectively. All substitute parts are available as new original stock.

Q: Can I use MAX3318ECPWR in production if SP3225ECY-L is obsolete?

A: MAX3318ECPWR carries Last Time Buy status, indicating discontinued production. While currently available with 3,700 pieces in stock, this part is not recommended for new production designs due to limited future availability and reduced electrical performance compared to SP3225ECY-L.

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