SP705CU-L Equivalent & Substitute Parts Reference

Part Overview

The SP705CU-L is a single-channel power management supervisor IC manufactured by MaxLinear, Inc., designed for reset and power-on reset applications in 8-MSOP surface mount packaging. This part is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives that maintain compatibility with existing designs while offering active product status and extended availability.

Key Parameters

Parameter	SP705CU-L
Manufacturer	MaxLinear, Inc.
Category	Power Management (PMIC)
Type	Simple Reset/Power-On Reset
Number of Voltages Monitored	1
Voltage - Threshold	4.65V
Reset	Active Low
Reset Timeout	140ms Minimum
Operating Temperature Range	0°C ~ 70°C (TA)
Mounting Type	Surface Mount
Package / Case	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
RoHS Status	RoHS Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Discontinued at DiGi Electronics

Substitute Part Grouping Explanation

Substitute parts for the SP705CU-L are qualified based on the following critical parameters that determine functional equivalence:

Single-channel voltage monitoring capability
4.65V voltage threshold
Active Low reset output
140ms minimum reset timeout (or compatible timing)
8-pin surface mount package (8-MSOP/8-TSSOP/8-uMAX/uSOP)
Active product status with current manufacturing availability

The substitute parts identified—DS1705EUA+T&R, MAX705EUA+, and MAX705EUA+T—meet these core substitution criteria. All three parts are manufactured by Analog Devices Inc./Maxim Integrated and maintain electrical compatibility with the original SP705CU-L specification while offering extended operating temperature ranges and active product status.

Parameter Comparison

Parameter	SP705CU-L	DS1705EUA+T&R	MAX705EUA+	MAX705EUA+T
Manufacturer	MaxLinear, Inc.	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated
Type	Simple Reset/Power-On Reset	Simple Reset/Power-On Reset	Simple Reset/Power-On Reset	Simple Reset/Power-On Reset
Number of Voltages Monitored	1	1	1	1
Voltage - Threshold	4.65V	4.65V	4.65V	4.65V
Output	—	Push-Pull, Totem Pole	Push-Pull, Totem Pole	Push-Pull, Totem Pole
Reset	Active Low	Active Low	Active Low	Active Low
Reset Timeout	140ms Minimum	130ms Minimum	140ms Minimum	140ms Minimum
Operating Temperature Range	0°C ~ 70°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
RoHS Status	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Discontinued at DiGi Electronics	Active	Active	Active

Engineering Selection Recommendations

All three substitute parts—DS1705EUA+T&R, MAX705EUA+, and MAX705EUA+T—are qualified replacements for the SP705CU-L based on electrical parameter equivalence and active product status.

DS1705EUA+T&R offers the lowest reset timeout specification at 130ms minimum, which remains compatible with the original 140ms minimum requirement. This part carries REACH Unaffected status and is supplied in Tape & Reel format with 937 units in current inventory.

MAX705EUA+ and MAX705EUA+T both match the original 140ms minimum reset timeout specification exactly. MAX705EUA+ is supplied in Tube packaging with 2,150 units in inventory. MAX705EUA+T is supplied in Tape & Reel format with 10,400 units in inventory, providing the highest stock availability.

All substitute parts support extended operating temperature ranges (-40°C to 85°C) compared to the original specification (0°C to 70°C), offering improved thermal performance margins. All three parts maintain ROHS3 compliance and MSL 1 rating, ensuring compatibility with standard manufacturing and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can the DS1705EUA+T&R be used as a direct replacement for SP705CU-L?

A: Yes. The DS1705EUA+T&R meets all core electrical substitution criteria: single-channel monitoring, 4.65V threshold, active low reset, and compatible 8-pin surface mount packaging. The 130ms reset timeout is shorter than the original 140ms specification, which does not create compatibility issues in applications designed for the original part.

Q: What is the difference between MAX705EUA+ and MAX705EUA+T?

A: Both parts are electrically identical with matching 140ms reset timeout and operating temperature range. The primary difference is packaging format: MAX705EUA+ is supplied in Tube packaging, while MAX705EUA+T is supplied in Tape & Reel format. Selection depends on assembly process requirements and volume needs.

Q: Are the substitute parts pin-compatible with SP705CU-L?

A: Yes. All substitute parts use the same 8-pin surface mount package (8-MSOP/8-TSSOP/8-uMAX/uSOP) with 0.118" width and 3.00mm pitch, ensuring direct PCB footprint compatibility.

Q: Do the substitute parts support the same operating temperature range as SP705CU-L?

A: The substitute parts support an extended operating temperature range of -40°C to 85°C, compared to the original SP705CU-L specification of 0°C to 70°C. This provides improved thermal performance margins for applications operating within the original temperature window.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts carry ROHS3 compliance certification, meeting current environmental and regulatory requirements. The original SP705CU-L carries RoHS Compliant status, and all substitutes maintain or exceed this compliance level.

Q: Which substitute part offers the best inventory availability?

A: MAX705EUA+T offers the highest current inventory with 10,400 units in stock, supplied in Tape & Reel format. This part is recommended for applications requiring immediate availability or high-volume procurement.

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