SP705CN-L Equivalent & Substitute Parts

Part Overview

The SP705CN-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 SP705CN-L is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Key Parameters

Parameter	SP705CN-L
Manufacturer	MaxLinear, Inc.
Category	Power Management (PMIC)
Package / Case	8-SOIC (0.154", 3.90mm Width)
Type	Simple Reset/Power-On Reset
Number of Voltages Monitored	1
Voltage - Threshold	4.65V
Reset	Active Low
Reset Timeout	140ms Minimum
Operating Temperature	0°C ~ 70°C (TA)
Mounting Type	Surface Mount
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the SP705CN-L is determined by strict alignment of the following critical parameters:

Package / Case: 8-SOIC (0.154", 3.90mm Width) — mechanical and electrical compatibility
Voltage - Threshold: 4.65V — functional equivalence for voltage monitoring
Number of Voltages Monitored: 1 — single-channel supervision requirement
Reset Logic: Active Low — output signal polarity compatibility
Reset Timeout: 140ms Minimum — timing specification for system initialization
Mounting Type: Surface Mount — PCB assembly compatibility
Moisture Sensitivity Level (MSL): 1 (Unlimited) — storage and handling requirements

Substitute parts are grouped into two categories based on output configuration and operating temperature range:

Category A: Active-Low Reset Output with Matching Temperature Range (0°C ~ 70°C)

MAX705CSA+ and MAX705CSA+T maintain identical operating temperature and reset logic to the SP705CN-L

Category B: Active-Low Reset Output with Extended Temperature Range (-40°C ~ 85°C)

ADM705ARZ, ADM705ARZ-REEL, ADM705ARZ-REEL7, MAX705ESA+, MAX705ESA+T, and MIC705MY provide extended temperature operation while maintaining active-low reset logic

Category C: Active-High Reset Output with Extended Temperature Range (-40°C ~ 85°C)

DS1706LESA+ and DS1706LESA+T&R feature active-high reset logic, requiring circuit-level evaluation for compatibility

Parameter Comparison

Part Number	Manufacturer	Package	Voltage Threshold	Reset Logic	Reset Timeout	Operating Temperature	Output Type	Product Status
SP705CN-L	MaxLinear, Inc.	8-SOIC	4.65V	Active Low	140ms Min	0°C ~ 70°C	—	Obsolete
MAX705CSA+	Analog Devices Inc./Maxim Integrated	8-SOIC	4.65V	Active Low	140ms Min	0°C ~ 70°C	Push-Pull, Totem Pole	Active
MAX705CSA+T	Analog Devices Inc./Maxim Integrated	8-SOIC	4.65V	Active Low	140ms Min	0°C ~ 70°C	Push-Pull, Totem Pole	Active
ADM705ARZ	Analog Devices Inc.	8-SOIC	4.65V	Active Low	160ms Min	-40°C ~ 85°C	Push-Pull, Totem Pole	Active
ADM705ARZ-REEL	Analog Devices Inc.	8-SOIC	4.65V	Active Low	160ms Min	-40°C ~ 85°C	Push-Pull, Totem Pole	Active
ADM705ARZ-REEL7	Analog Devices Inc.	8-SOIC	4.65V	Active Low	160ms Min	-40°C ~ 85°C	Push-Pull, Totem Pole	Active
MAX705ESA+	Analog Devices Inc./Maxim Integrated	8-SOIC	4.65V	Active Low	140ms Min	-40°C ~ 85°C	Push-Pull, Totem Pole	Active
MAX705ESA+T	Analog Devices Inc./Maxim Integrated	8-SOIC	4.65V	Active Low	140ms Min	-40°C ~ 85°C	Push-Pull, Totem Pole	Active
MIC705MY	Microchip Technology	8-SOIC	4.65V	Active Low	140ms Min	-40°C ~ 85°C	—	Active
DS1706LESA+	Analog Devices Inc./Maxim Integrated	8-SOIC	4.65V	Active High	130ms Min	-40°C ~ 85°C	Push-Pull, Totem Pole	Active
DS1706LESA+T&R	Analog Devices Inc./Maxim Integrated	8-SOIC	4.65V	Active High	130ms Min	-40°C ~ 85°C	Push-Pull, Totem Pole	Active

Engineering Selection Recommendations

Direct Substitutes (Recommended for Immediate Replacement)

MAX705CSA+ and MAX705CSA+T are the closest functional equivalents, maintaining identical operating temperature range (0°C ~ 70°C), reset timeout (140ms minimum), and active-low reset logic. Both parts are active products with ROHS3 compliance and unlimited moisture sensitivity rating. These parts are suitable for designs where the original temperature specification is sufficient.

Extended Temperature Substitutes (Recommended for Broader Environmental Requirements)

MAX705ESA+ and MAX705ESA+T provide extended operating temperature (-40°C ~ 85°C) while preserving the 140ms reset timeout and active-low reset logic of the SP705CN-L. These parts are active products with ROHS3 compliance and are recommended when designs require operation beyond the original 0°C ~ 70°C range.

Alternative Substitutes with Modified Timing

ADM705ARZ, ADM705ARZ-REEL, and ADM705ARZ-REEL7 offer extended temperature operation and active-low reset logic but specify a 160ms minimum reset timeout compared to the SP705CN-L's 140ms. These parts are suitable when the additional 20ms timing margin is acceptable for system initialization requirements.

Microchip Alternative

MIC705MY from Microchip Technology provides active-low reset logic, 140ms reset timeout, and extended temperature operation (-40°C ~ 85°C). This part offers supply chain diversification while maintaining functional compatibility.

Active-High Reset Alternative (Circuit Evaluation Required)

DS1706LESA+ and DS1706LESA+T&R feature active-high reset logic, which inverts the output signal polarity compared to the SP705CN-L. These parts require circuit-level design review to confirm compatibility with existing reset signal conditioning and system logic.

Frequently Asked Questions (FAQ)

Q: Can I directly replace SP705CN-L with MAX705CSA+ without circuit modifications?

A: Yes. MAX705CSA+ maintains identical voltage threshold (4.65V), reset logic (active low), reset timeout (140ms minimum), and operating temperature range (0°C ~ 70°C). The 8-SOIC package is mechanically and electrically compatible. No circuit modifications are required.

Q: What is the difference between ADM705ARZ and MAX705ESA+?

A: Both parts provide extended temperature operation (-40°C ~ 85°C) and active-low reset logic. The primary difference is reset timeout: ADM705ARZ specifies 160ms minimum, while MAX705ESA+ specifies 140ms minimum. MAX705ESA+ is preferred if the original 140ms timing specification must be maintained.

Q: Why do some substitute parts have different reset timeout values?

A: Reset timeout is a manufacturing parameter that varies by device design. ADM705ARZ specifies 160ms minimum, while MAX705CSA+, MAX705ESA+, and MIC705MY specify 140ms minimum. Both values exceed the SP705CN-L's 140ms requirement and are functionally compatible. Verify system initialization timing requirements before selection.

Q: Can I use DS1706LESA+ as a direct replacement?

A: DS1706LESA+ requires circuit evaluation. While it maintains the 4.65V threshold and 8-SOIC package, it features active-high reset logic instead of active-low. This inverts the output signal polarity and may require changes to reset signal conditioning or system logic. Consult system documentation before substitution.

Q: What is the difference between packaging options like MAX705CSA+, MAX705CSA+T, and MAX705ESA+T?

A: MAX705CSA+ is supplied in tube packaging; MAX705CSA+T is supplied in cut tape and Digi-Reel format. MAX705ESA+T is the extended temperature variant in cut tape and Digi-Reel format. All three are electrically identical within their respective temperature ratings. Selection depends on assembly process requirements and packaging preferences.

Q: Are all substitute parts ROHS3 compliant?

A: All active substitute parts listed (MAX705 series, ADM705 series, MIC705MY, and DS1706 series) are ROHS3 compliant. The original SP705CN-L does not specify RoHS status due to its obsolete classification.

Q: Which substitute part offers the best supply availability?

A: MAX705ESA+T and ADM705ARZ-REEL7 offer the highest inventory levels (50,300 and 28,895 units respectively) among active substitutes, providing supply chain stability for production requirements.

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