SP705CU-L/TR Equivalent & Substitute Parts

Part Overview

The SP705CU-L/TR is a single-channel power supply supervisor IC manufactured by MaxLinear, Inc., designed for power-on reset and voltage monitoring applications. This device is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. The SP705CU-L/TR operates across a 0°C to 70°C temperature range and is packaged in an 8-MSOP surface mount configuration with a 4.65V voltage threshold and 140ms minimum reset timeout.

Substiute Parts

SP705CU-L/TR

MaxLinear, Inc.In Stock: 7829SP705CU-L/TR Datasheet

Current PartRFQ

SP705CN-L/TR

MaxLinear, Inc.In Stock: 1425SP705CN-L/TR Datasheet

MFR RecommendedRFQ

DS1705EUA+T&R

Analog Devices Inc./Maxim IntegratedIn Stock: 1010DS1705EUA+T&R Datasheet

MFR RecommendedRFQ

MAX705EUA+

Analog Devices Inc./Maxim IntegratedIn Stock: 2174MAX705EUA+ Datasheet

MFR RecommendedRFQ

MAX705EUA+T

Analog Devices Inc./Maxim IntegratedIn Stock: 10427MAX705EUA+T Datasheet

MFR RecommendedRFQ

TPS3705-50DGN

Texas InstrumentsIn Stock: 850TPS3705-50DGN Datasheet

MFR RecommendedRFQ

TPS3705-50DGNR

Texas InstrumentsIn Stock: 2565TPS3705-50DGNR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SP705CU-L/TR is determined by the following critical parameters:

• Single-channel voltage monitoring with active-low reset output
• Voltage threshold tolerance of 4.65V ±tolerance
• Reset timeout of 140ms minimum
• 8-pin surface mount package (8-MSOP, 8-TSSOP, or 8-SOIC variants)
• Active Low reset logic
• Moisture Sensitivity Level 1 (unlimited shelf life)

Substitute parts are grouped into two categories:

1. Direct MaxLinear/Analog Devices variants (SP705CN-L/TR, MAX705EUA+, MAX705EUA+T, DS1705EUA+T&R): Same functional specifications with package or output stage variations
2. Texas Instruments equivalents (TPS3705-50DGN, TPS3705-50DGNR): Functionally equivalent with minor voltage threshold variation (4.55V vs. 4.65V)

All substitutes maintain the core reset/power-on reset functionality, single-channel monitoring, and active-low reset configuration required for direct replacement in supervisor applications.

Parameter Comparison

Engineering Selection Recommendations

For direct form-fit-function replacement with minimal design changes:

• SP705CN-L/TR is the primary substitute, maintaining identical voltage threshold (4.65V), reset timeout (140ms), and operating temperature range (0°C ~ 70°C). The package change from 8-MSOP to 8-SOIC requires PCB layout modification. Product status is Active with RoHS compliance.

For extended temperature range applications:

• MAX705EUA+ and MAX705EUA+T provide identical voltage threshold and reset timeout specifications with expanded operating temperature (-40°C ~ 85°C). Output stage is Push-Pull/Totem Pole instead of open drain, requiring circuit verification. Both are Active status with ROHS3 compliance.
• DS1705EUA+T&R offers equivalent functionality with 130ms reset timeout (meets 140ms minimum requirement) and extended temperature range. Active status with ROHS3 compliance.

For Texas Instruments platform standardization:

• TPS3705-50DGN and TPS3705-50DGNR provide equivalent functionality with 4.55V threshold (0.1V lower than original 4.65V) and Push-Pull output. Both are Active status with ROHS3 compliance and extended temperature range (-40°C ~ 85°C).

All substitute parts maintain Moisture Sensitivity Level 1 (unlimited shelf life) and EAR99 export classification consistent with the original SP705CU-L/TR.

Frequently Asked Questions (FAQ)

Q: Can SP705CN-L/TR directly replace SP705CU-L/TR without circuit modifications? A: SP705CN-L/TR is functionally equivalent with identical voltage threshold (4.65V), reset timeout (140ms), and operating temperature range. The package change from 8-MSOP to 8-SOIC requires PCB layout redesign but no circuit modifications.

Q: What is the key difference between MAX705EUA+ and TPS3705-50DGNR? A: Both provide equivalent reset/power-on reset functionality with extended temperature range (-40°C ~ 85°C). The primary difference is voltage threshold: MAX705EUA+ at 4.65V versus TPS3705-50DGNR at 4.55V. Output stage is identical (Push-Pull/Totem Pole) for both.

Q: Why does DS1705EUA+T&R have a 130ms reset timeout instead of 140ms? A: DS1705EUA+T&R specifies 130ms minimum reset timeout, which meets the 140ms minimum requirement of the original SP705CU-L/TR. This represents a tighter specification and is acceptable for direct substitution.

Q: Are all substitute parts RoHS compliant? A: SP705CN-L/TR, MAX705EUA+, MAX705EUA+T, DS1705EUA+T&R, TPS3705-50DGN, and TPS3705-50DGNR are all RoHS compliant (RoHS Compliant or ROHS3 Compliant). The original SP705CU-L/TR RoHS status is not specified.

Q: What packaging options are available for substitutes? A: Substitute parts are available in 8-SOIC (SP705CN-L/TR), 8-MSOP (MAX705EUA+, MAX705EUA+T, DS1705EUA+T&R), and 8-HVSSOP (TPS3705-50DGN, TPS3705-50DGNR). Package selection depends on PCB layout constraints and manufacturing capabilities.

Q: Can I use MAX705EUA+ in place of MAX705EUA+T? A: Both parts are functionally identical with identical voltage threshold (4.65V), reset timeout (140ms), and operating temperature range (-40°C ~ 85°C). The difference is packaging: MAX705EUA+ is supplied in Tube, while MAX705EUA+T is supplied in Tape & Reel (TR). Selection depends on production volume and handling requirements.