DS1232SN Equivalent & Substitute Parts

Part Overview

The DS1232SN is a single-channel power supply supervisor IC manufactured by Analog Devices Inc./Maxim Integrated, designed for power management and reset control applications. This component operates as a simple reset/power-on reset supervisor with open drain and push-pull output options. The DS1232SN is classified as obsolete, which necessitates identification of functionally equivalent alternatives for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility across voltage monitoring, output configuration, and reset timing parameters while accommodating modern RoHS compliance requirements.

Key Parameters

Parameter	DS1232SN Value
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	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	16-SOIC (0.295", 7.50mm Width)
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the DS1232SN are classified based on strict electrical and mechanical parameter alignment. The primary substitution criteria are:

Critical Parameters for Substitution:

Single-channel voltage monitoring capability
Voltage threshold range: 4.37V and 4.62V
Output configuration: Open Drain and/or Push-Pull
Reset logic: Active High/Active Low capability
Package: 16-SOIC form factor
Operating temperature range compatibility

Substitution Categories:

Direct Manufacturer Equivalents (Analog Devices/Maxim): DS1232SN+ and DS1232LPSN+ maintain identical electrical specifications with improved RoHS3 compliance status. These parts are pin-compatible and functionally interchangeable with the obsolete DS1232SN.

Manufacturer-Recommended Alternatives (Analog Devices): ADM1232ARWZ and ADM1232ARWZ-REEL variants feature adjustable/selectable voltage thresholds instead of fixed 4.37V/4.62V values, providing design flexibility. Reset timeout is specified as 250ms minimum. These parts are available in both tube and tape & reel packaging.

Cross-Manufacturer Equivalents (Microchip Technology): TC1232 series parts (TC1232COE, TC1232COE713, TC1232EOE, TC1232EOE713) provide functional equivalence with fixed voltage thresholds of 4.37V and 4.62V. The TC1232EOE and TC1232EOE713 variants support the full -40°C ~ 85°C temperature range, while TC1232COE variants operate within 0°C ~ 70°C.

Parameter Comparison

Part Number	Manufacturer	Product Status	Voltage Threshold	Output Type	Reset Timeout	Operating Temp	Package	RoHS Status	Inventory (Pcs)
DS1232SN	Analog Devices Inc./Maxim	Obsolete	4.37V, 4.62V	Open Drain, Push-Pull	Adjustable/Selectable	-40°C ~ 85°C	16-SOIC	RoHS non-compliant	3066
DS1232SN+	Analog Devices Inc./Maxim	Active	4.37V, 4.62V	Open Drain, Push-Pull	Adjustable/Selectable	-40°C ~ 85°C	16-SOIC	ROHS3 Compliant	2100
DS1232LPSN+	Analog Devices Inc./Maxim	Active	4.37V, 4.62V	Open Drain, Push-Pull	Adjustable/Selectable	-40°C ~ 85°C	16-SOIC	ROHS3 Compliant	1344
ADM1232ARWZ	Analog Devices Inc.	Active	Adjustable/Selectable	Open Drain, Push-Pull	250ms Minimum	-40°C ~ 85°C	16-SOIC	ROHS3 Compliant	3079
ADM1232ARWZ-REEL	Analog Devices Inc.	Active	Adjustable/Selectable	Open Drain, Push-Pull	250ms Minimum	-40°C ~ 85°C	16-SOIC	ROHS3 Compliant	2170
ADM1232ARWZ-REEL7	Analog Devices Inc.	Active	Adjustable/Selectable	Open Drain, Push-Pull	250ms Minimum	-40°C ~ 85°C	16-SOIC	ROHS3 Compliant	1885
TC1232COE	Microchip Technology	Active	4.37V, 4.62V	Open Drain or Open Collector	250ms Minimum	0°C ~ 70°C	16-SOIC	ROHS3 Compliant	689
TC1232COE713	Microchip Technology	Active	4.37V, 4.62V	Open Drain or Open Collector	250ms Minimum	0°C ~ 70°C	16-SOIC	ROHS3 Compliant	766
TC1232EOE	Microchip Technology	Active	4.37V, 4.62V	Open Drain or Open Collector	250ms Minimum	-40°C ~ 85°C	16-SOIC	ROHS3 Compliant	1117
TC1232EOE713	Microchip Technology	Active	4.37V, 4.62V	Open Drain or Open Collector	250ms Minimum	-40°C ~ 85°C	16-SOIC	ROHS3 Compliant	692

Engineering Selection Recommendations

For Direct Replacement with Minimal Design Changes: DS1232SN+ and DS1232LPSN+ are the preferred substitutes. Both parts maintain identical electrical specifications to the obsolete DS1232SN while achieving ROHS3 compliance. These parts require no circuit modifications and provide the same fixed voltage thresholds (4.37V, 4.62V) and adjustable reset timeout functionality. DS1232SN+ is available with higher inventory (2100 units) compared to DS1232LPSN+ (1344 units).

For Enhanced Design Flexibility: ADM1232ARWZ and ADM1232ARWZ-REEL variants offer adjustable/selectable voltage thresholds, enabling threshold customization for specific application requirements. These parts maintain the full -40°C ~ 85°C operating range and ROHS3 compliance. The ADM1232ARWZ-REEL7 variant is optimized for high-volume production with tape & reel packaging.

For Extended Temperature Range with Fixed Thresholds: TC1232EOE and TC1232EOE713 (Microchip Technology) provide fixed voltage thresholds matching the DS1232SN while supporting the full -40°C ~ 85°C operating temperature range. These parts are suitable for applications requiring cross-manufacturer qualification. TC1232EOE713 is packaged in tape & reel format for automated assembly.

For Standard Industrial Temperature Applications: TC1232COE and TC1232COE713 operate within 0°C ~ 70°C and are suitable for non-extended-temperature applications. These parts provide cost-effective alternatives with fixed voltage thresholds and ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can DS1232SN+ be used as a direct replacement for DS1232SN? A: Yes. DS1232SN+ is electrically and mechanically identical to DS1232SN with the addition of ROHS3 compliance. No circuit modifications are required.

Q: What is the primary difference between DS1232LPSN+ and DS1232SN+? A: Both parts are functionally equivalent with identical electrical specifications. The difference lies in the base product number designation (DS1232LP vs. DS1232), which may reflect internal manufacturing or qualification differences. Electrical performance and pin compatibility are identical.

Q: Why would I select ADM1232ARWZ over DS1232SN+? A: ADM1232ARWZ provides adjustable/selectable voltage thresholds instead of fixed 4.37V/4.62V values. This flexibility allows threshold customization for specific power supply monitoring requirements. Selection depends on whether your application requires fixed or adjustable thresholds.

Q: Are Microchip TC1232 parts fully compatible with Analog Devices DS1232 parts? A: TC1232 parts are functionally equivalent with identical voltage thresholds (4.37V, 4.62V), output configurations, and reset logic. Both manufacturers' parts are pin-compatible in 16-SOIC packaging. Cross-manufacturer substitution is supported for applications where multi-source qualification is acceptable.

Q: What is the temperature range limitation of TC1232COE compared to TC1232EOE? A: TC1232COE operates within 0°C ~ 70°C, while TC1232EOE supports the extended range of -40°C ~ 85°C. For applications requiring extended temperature operation, TC1232EOE is the appropriate selection.

Q: Does packaging format (tube vs. tape & reel) affect electrical performance? A: No. Packaging format (tube, tape & reel, or tape & reel with 7-inch reel designation) does not affect electrical specifications. Selection is based on assembly process requirements and inventory management preferences.

Q: Are all substitute parts ROHS3 compliant? A: All active substitute parts listed (DS1232SN+, DS1232LPSN+, ADM1232 variants, and TC1232 variants) are ROHS3 compliant. The original DS1232SN is RoHS non-compliant due to its obsolete status.

Q: Can I use TC1232COE in an application requiring -40°C ~ 85°C operation? A: No. TC1232COE is rated for 0°C ~ 70°C operation only. For extended temperature applications, use TC1232EOE or equivalent Analog Devices parts (DS1232SN+, DS1232LPSN+, ADM1232 variants).

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