SP705EN-L Equivalent & Substitute Parts

Part Overview

The SP705EN-L is a single-channel power supply supervisor IC manufactured by MaxLinear, Inc., housed in an 8-SOIC surface mount package. This device monitors a single voltage rail with a 4.65V threshold and provides active-low reset output with a 140ms minimum reset timeout. The SP705EN-L is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support, maintenance, and production continuity. Substitute parts must maintain functional equivalence across voltage monitoring, reset polarity, timing characteristics, and package form factor.

Key Parameters

Parameter	SP705EN-L
Manufacturer	MaxLinear, Inc.
Category	Power Management (PMIC)
Type	Simple Reset/Power-On Reset
Number of Voltages Monitored	1
Voltage - Threshold	4.65V
Reset Polarity	Active Low
Reset Timeout	140ms Minimum
Operating Temperature Range	-40°C ~ 85°C (TA)
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the SP705EN-L is determined by strict alignment of the following electrical and mechanical parameters:

Critical Substitution Criteria:

Single voltage monitoring channel
4.65V voltage threshold
8-SOIC package form factor (0.154", 3.90mm Width)
Surface mount technology
Operating temperature range compatibility
Reset polarity and timeout characteristics

Substitute parts are grouped into two functional categories based on reset output configuration:

Category A: Active-Low Reset Output (Direct Functional Equivalents) Parts with active-low reset polarity matching the SP705EN-L original specification. These include ADM705ARZ, ADM705ARZ-REEL, ADM705ARZ-REEL7, MAX705CSA+, MAX705CSA+T, MAX705ESA+, MAX705ESA+T, and MIC705MY. All maintain 4.65V threshold, 140ms reset timeout (or compatible timing), and identical package specifications.

Category B: Active-High Reset Output (Functional Alternatives) Parts with active-high reset polarity, including DS1706LESA+ and DS1706LESA+T&R. These require circuit-level evaluation due to inverted reset logic but maintain all other critical parameters including 4.65V threshold, 8-SOIC package, and compatible operating temperature range.

Parameter Comparison

Part Number	Manufacturer	Voltage Threshold	Reset Polarity	Reset Timeout	Operating Temp	Output Type	Package	Product Status
SP705EN-L	MaxLinear, Inc.	4.65V	Active Low	140ms Min	-40°C ~ 85°C	—	8-SOIC	Obsolete
ADM705ARZ	Analog Devices Inc.	4.65V	Active Low	160ms Min	-40°C ~ 85°C	Push-Pull, Totem Pole	8-SOIC	Active
ADM705ARZ-REEL	Analog Devices Inc.	4.65V	Active Low	160ms Min	-40°C ~ 85°C	Push-Pull, Totem Pole	8-SOIC	Active
ADM705ARZ-REEL7	Analog Devices Inc.	4.65V	Active Low	160ms Min	-40°C ~ 85°C	Push-Pull, Totem Pole	8-SOIC	Active
DS1706LESA+	Analog Devices Inc./Maxim Integrated	4.65V	Active High	130ms Min	-40°C ~ 85°C	Push-Pull, Totem Pole	8-SOIC	Active
DS1706LESA+T&R	Analog Devices Inc./Maxim Integrated	4.65V	Active High	130ms Min	-40°C ~ 85°C	Push-Pull, Totem Pole	8-SOIC	Active
MAX705CSA+	Analog Devices Inc./Maxim Integrated	4.65V	Active Low	140ms Min	0°C ~ 70°C	Push-Pull, Totem Pole	8-SOIC	Active
MAX705CSA+T	Analog Devices Inc./Maxim Integrated	4.65V	Active Low	140ms Min	0°C ~ 70°C	Push-Pull, Totem Pole	8-SOIC	Active
MAX705ESA+	Analog Devices Inc./Maxim Integrated	4.65V	Active Low	140ms Min	-40°C ~ 85°C	Push-Pull, Totem Pole	8-SOIC	Active
MAX705ESA+T	Analog Devices Inc./Maxim Integrated	4.65V	Active Low	140ms Min	-40°C ~ 85°C	Push-Pull, Totem Pole	8-SOIC	Active
MIC705MY	Microchip Technology	4.65V	Active Low	140ms Min	-40°C ~ 85°C	—	8-SOIC	Active

Engineering Selection Recommendations

Primary Substitutes (Active-Low Reset, Full Temperature Range)

MAX705ESA+ and MAX705ESA+T are the preferred direct substitutes for SP705EN-L. Both are manufactured by Analog Devices Inc./Maxim Integrated, maintain active-low reset polarity, 4.65V threshold, 140ms reset timeout, and -40°C ~ 85°C operating temperature range. Both carry ROHS3 compliance and REACH unaffected status. MAX705ESA+T is available in cut tape and Digi-Reel packaging with higher inventory (50,300 units), while MAX705ESA+ is supplied in tube packaging (1,320 units).

MIC705MY from Microchip Technology provides an alternative with identical electrical specifications and temperature range. This part maintains active-low reset, 4.65V threshold, and 140ms timeout. MIC705MY carries ROHS3 compliance and is available in tube packaging with 6,348 units in stock.

Secondary Substitutes (Active-Low Reset, Restricted Temperature Range)

MAX705CSA+ and MAX705CSA+T are functionally equivalent but operate within a narrower temperature range (0°C ~ 70°C). These parts are suitable only for applications that do not require the full -40°C ~ 85°C operating envelope. Both maintain active-low reset, 4.65V threshold, and 140ms timeout with ROHS3 compliance.

Timing-Variant Substitutes (Active-Low Reset, Extended Timeout)

ADM705ARZ, ADM705ARZ-REEL, and ADM705ARZ-REEL7 from Analog Devices Inc. maintain active-low reset and 4.65V threshold but specify 160ms minimum reset timeout compared to the original 140ms. These parts are suitable for applications where extended reset timing is acceptable or beneficial. All three variants carry ROHS3 compliance and operate across -40°C ~ 85°C. Packaging options include tube (ADM705ARZ, 21,100 units) and cut tape with Digi-Reel (ADM705ARZ-REEL, 15,300 units; ADM705ARZ-REEL7, 28,895 units).

Active-High Reset Alternatives (Functional Evaluation Required)

DS1706LESA+ and DS1706LESA+T&R from Analog Devices Inc./Maxim Integrated (MicroMonitor™ series) feature inverted reset polarity (active-high). These parts maintain 4.65V threshold and -40°C ~ 85°C operating range but specify 130ms minimum reset timeout. Circuit-level design changes are required to accommodate active-high reset logic. Both carry ROHS3 compliance. DS1706LESA+ is available in tube packaging (1,165 units), while DS1706LESA+T&R is supplied in tape and reel format (962 units).

Compliance and Regulatory Status

All substitute parts listed carry ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements. All parts maintain MSL 1 (Unlimited) moisture sensitivity classification, matching the original SP705EN-L specification.

Frequently Asked Questions (FAQ)

Q: Can MAX705CSA+ or MAX705CSA+T be used as direct replacements for SP705EN-L?

A: MAX705CSA+ and MAX705CSA+T are functionally equivalent in terms of voltage threshold, reset polarity, and reset timeout. However, these parts operate within a restricted temperature range of 0°C ~ 70°C, compared to the SP705EN-L's -40°C ~ 85°C range. Use these parts only if your application operates within the narrower temperature envelope.

Q: What is the difference between ADM705ARZ, ADM705ARZ-REEL, and ADM705ARZ-REEL7?

A: All three variants are electrically identical with 4.65V threshold, active-low reset, and -40°C ~ 85°C operation. The differences are packaging and format: ADM705ARZ is supplied in tube, ADM705ARZ-REEL in cut tape with standard Digi-Reel, and ADM705ARZ-REEL7 in cut tape with 7-inch Digi-Reel. Select based on your assembly process requirements and tape reel specifications.

Q: Why do ADM705ARZ parts specify 160ms reset timeout instead of 140ms?

A: The 160ms reset timeout is a specification difference from the original SP705EN-L (140ms). This extended timeout is acceptable for most applications and may provide additional system stability margin. Confirm that your circuit design accommodates this timing difference before selection.

Q: Can DS1706LESA+ or DS1706LESA+T&R replace SP705EN-L directly?

A: DS1706LESA+ and DS1706LESA+T&R maintain the same voltage threshold (4.65V), package (8-SOIC), and temperature range (-40°C ~ 85°C) as SP705EN-L. However, these parts feature active-high reset polarity instead of active-low. Direct substitution requires circuit redesign to invert the reset signal logic. Use these parts only if your design can accommodate active-high reset output.

Q: What is the difference between tube and tape & reel packaging?

A: Tube packaging is suitable for manual assembly and small-volume production. Tape & reel (T&R) and cut tape (CT) with Digi-Reel packaging are designed for automated pick-and-place assembly equipment. Select packaging based on your manufacturing process and assembly volume requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed carry ROHS3 compliance and REACH unaffected status, meeting current environmental regulations. The original SP705EN-L does not specify ROHS status due to its obsolete classification.

Q: Which substitute offers the best inventory availability?

A: MAX705ESA+T offers the highest inventory level at 50,300 units in stock. ADM705ARZ-REEL7 provides 28,895 units, and MAX705CSA+T provides 29,178 units. Inventory levels should be confirmed with your supplier for current availability.

Q: Can MIC705MY be used as a substitute?

A: Yes. MIC705MY from Microchip Technology maintains active-low reset, 4.65V threshold, 140ms reset timeout, -40°C ~ 85°C operation, and 8-SOIC package. It is a direct functional equivalent with ROHS3 compliance and 6,348 units available in tube packaging.

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