DS1232LPS-2 Equivalent & Substitute Parts

Part Overview

The DS1232LPS-2 is a single-channel power supply supervisor IC manufactured by Analog Devices Inc./Maxim Integrated, designed for power-on reset and simple reset applications in power management circuits. This device monitors a single voltage rail and provides active high/active low reset outputs with adjustable/selectable timeout characteristics. The DS1232LPS-2 is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. Substitute parts must maintain functional equivalence across voltage monitoring thresholds, output configurations, and package specifications to ensure direct circuit compatibility.

Key Parameters

Parameter	DS1232LPS-2
Manufacturer	Analog Devices Inc./Maxim Integrated
Category	Power Management (PMIC)
Type	Simple Reset/Power-On Reset
Number of Voltages Monitored	1
Voltage Threshold	4.37V, 4.62V
Output Configuration	Open Drain, Push-Pull
Reset Logic	Active High/Active Low
Reset Timeout	Adjustable/Selectable
Operating Temperature Range	0°C ~ 70°C (TA)
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the DS1232LPS-2 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

Single voltage channel monitoring capability
Voltage threshold levels: 4.37V and 4.62V
Output type: Open Drain or Open Collector (functionally equivalent in reset applications)
Reset logic: Active High/Active Low capability
Package: 8-SOIC form factor with identical pin pitch and dimensions
Surface mount technology
Moisture Sensitivity Level: 1 (Unlimited)

Acceptable Variations:

Reset timeout: Adjustable/Selectable or fixed 250ms minimum (both satisfy reset timing requirements)
Operating temperature range: Extended ranges (e.g., -40°C ~ 85°C) are acceptable as they encompass the original 0°C ~ 70°C specification
Product status: Active status is preferred for long-term availability
RoHS compliance: ROHS3 compliant versions are acceptable for new designs
Packaging format: Tube, Cut Tape (CT) & Digi-Reel®, or Tape & Reel configurations are interchangeable based on procurement requirements

Parameter Comparison

Parameter	DS1232LPS-2	DS1232LPS-2+	TC1232COA	TC1232COA713	TC1232EOA
Manufacturer	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated	Microchip Technology	Microchip Technology	Microchip Technology
Type	Simple Reset/Power-On Reset	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	1
Voltage Threshold	4.37V, 4.62V	4.37V, 4.62V	4.37V, 4.62V	4.37V, 4.62V	4.37V, 4.62V
Output Configuration	Open Drain, Push-Pull	Open Drain, Push-Pull	Open Drain or Open Collector	Open Drain or Open Collector	Open Drain or Open Collector
Reset Logic	Active High/Active Low	Active High/Active Low	Active High/Active Low	Active High/Active Low	Active High/Active Low
Reset Timeout	Adjustable/Selectable	Adjustable/Selectable	250ms Minimum	250ms Minimum	250ms Minimum
Operating Temperature Range	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)	-40°C ~ 85°C (TA)
Package / Case	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitute: DS1232LPS-2+

The DS1232LPS-2+ is the direct successor from Analog Devices Inc./Maxim Integrated, maintaining identical electrical specifications and package configuration. This part is currently in active production status and carries ROHS3 compliance, making it the preferred choice for designs requiring minimal qualification effort. The DS1232LPS-2+ is functionally equivalent across all critical parameters and requires no circuit modifications.

Secondary Substitutes: TC1232COA, TC1232COA713, TC1232EOA

The Microchip Technology TC1232 series parts (TC1232COA, TC1232COA713, TC1232EOA) provide functional equivalence with identical voltage thresholds, single-channel monitoring, and 8-SOIC packaging. All three variants are in active production with ROHS3 compliance. The TC1232EOA offers an extended operating temperature range (-40°C ~ 85°C) compared to the original specification, providing additional thermal margin for demanding applications. Selection among TC1232 variants depends on packaging requirements: TC1232COA is supplied in Tube format, TC1232COA713 in Cut Tape & Digi-Reel® format, and TC1232EOA in Tube format with extended temperature rating.

Compliance Considerations

For new designs, ROHS3 compliant substitutes (DS1232LPS-2+, TC1232COA, TC1232COA713, TC1232EOA) are required to meet current regulatory standards. The original DS1232LPS-2 is RoHS non-compliant and should be replaced in production designs.

Frequently Asked Questions (FAQ)

Q: Can the DS1232LPS-2 be directly replaced with the DS1232LPS-2+?

A: Yes. The DS1232LPS-2+ is the direct successor with identical electrical specifications, voltage thresholds (4.37V, 4.62V), output configuration (Open Drain, Push-Pull), and 8-SOIC package. No circuit modifications are required.

Q: What is the functional difference between Open Drain and Open Collector outputs?

A: In reset supervisor applications, Open Drain and Open Collector outputs are functionally equivalent. Both require external pull-up resistors and provide the same reset signal logic. The TC1232 series specifies "Open Drain or Open Collector," confirming compatibility with circuits designed for the DS1232LPS-2's Open Drain output.

Q: Are the Microchip TC1232 parts pin-compatible with the DS1232LPS-2?

A: Yes. All substitute parts use the 8-SOIC package with identical pin pitch (0.154", 3.90mm width) and pinout configuration. Direct PCB substitution is possible without layout modifications.

Q: Does the TC1232EOA's extended temperature range (-40°C ~ 85°C) affect circuit operation?

A: No. Extended temperature ranges are backward compatible. The TC1232EOA operates within the original 0°C ~ 70°C specification and provides additional thermal margin for applications requiring operation outside the standard range.

Q: What is the difference between TC1232COA and TC1232COA713?

A: Both parts are electrically identical. The difference is packaging format: TC1232COA is supplied in Tube, while TC1232COA713 is supplied in Cut Tape & Digi-Reel® format. Selection depends on procurement and assembly requirements.

Q: Is the 250ms minimum reset timeout of the TC1232 series compatible with the DS1232LPS-2's adjustable timeout?

A: Yes. The DS1232LPS-2 offers adjustable/selectable timeout, while the TC1232 series specifies a 250ms minimum fixed timeout. Both satisfy reset timing requirements in standard power-on reset applications. Verify circuit timeout requirements before substitution if custom timing is critical.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. DS1232LPS-2+, TC1232COA, TC1232COA713, and TC1232EOA are all ROHS3 compliant. The original DS1232LPS-2 is RoHS non-compliant and should be replaced in new production designs.

Q: Can I use TC1232 parts in existing DS1232LPS-2 designs without re-qualification?

A: Electrical equivalence is confirmed across voltage thresholds, output logic, and package specifications. However, component substitution in production designs should follow your organization's change control and qualification procedures.

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