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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Supervisors

Analog Devices Inc./Maxim Integrated DS1233D-15+

Name: DS1233D-15+
Brand: Analog Devices Inc./Maxim Integrated
SKU: DS1233D-15+
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DS1233D-15+

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Supervisors

Package:: TO-226-3, TO-92-3 (TO-226AA)

Datasheet:: DS1233D-15+.pdf

Description:: IC SUPERVISOR 1 CHANNEL TO92-3

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Product details

Overview

DS1233D-15+ from Maxim Integrated (now Analog Devices) is a precision 5V microprocessor supervisory circuit with 15% V_CC trip point (4.0–4.24 V), 350 ms reset timeout, and internal 5 kΩ pull-up resistor. It monitors power supply integrity, asserts active-low RESET during out-of-tolerance conditions, and supports Motorola 68XXX and HC16 microprocessors in embedded control systems.

For engineers reviewing the DS1233D-15+ datasheet, DS1233D-15+ pinout, DS1233D-15+ application, or DS1233D-15+ equivalent, key selection criteria include guaranteed 15% V_CC threshold accuracy, -40°C to +85°C industrial temperature operation, TO-92/SOT-223 package options, 350 ms minimum reset pulse width, and compatibility with legacy 5V microcontroller reset logic.

Technical Context

The DS1233D-15+ integrates a temperature-compensated voltage reference and comparator to detect V_CC droop below 4.125 V (typical), triggering an open-drain active-low RESET signal. Its internal timing circuit holds RESET asserted for ≥250 ms (min) and ≤450 ms (max) after V_CC recovery, ensuring stable processor boot.

No external capacitor is required for reset timing - the 350 ms delay is factory-trimmed and internally generated. The device operates with V_CC as low as 1.2 V but guarantees correct trip-point detection only within 5.0 V ±10%, and features 100 ns propagation delay from V_CC fault detection to RST assertion.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Trip Point	4.0–4.24 V (15% tolerance); ensures reliable reset initiation before 5V rail collapse affects CPU operation
Reset Pulse Width	250–450 ms; provides sufficient stabilization time for 5V microcontrollers post-power recovery
Supply Voltage Range	1.2–5.5 V; enables operation during brown-out but valid monitoring only at 5V ±10%
Output Type	Open-drain RESET; requires external pull-up or uses internal 3.75–6.25 kΩ resistor
Operating Temperature	-40°C to +85°C; qualified for industrial-grade embedded systems without derating
Propagation Delay	100 ns (V_CC detect to RST); enables fast response to sudden power faults
Output Drive	8 mA sink capability at 0.4 V; directly drives standard TTL/CMOS reset inputs

Pinout & Package

DS1233D-15+ is available in TO-92 (3-pin) and SOT-223 (4-pin) packages. The SOT-223 variant includes an additional ground pin (Pin 4) for improved thermal and noise performance.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (TO-92) / Pin 1 (SOT-223)	GROUND	Primary return path for internal reference and comparator; must be connected to system ground plane
Pin 2 (TO-92) / Pin 2 (SOT-223)	RESET	Active-low open-drain output; sinks current when V_CC is out-of-tolerance or during power-up delay
Pin 3 (TO-92) / Pin 3 (SOT-223)	V_CC	Power supply input; monitored for 15% undervoltage condition; also powers internal circuitry
Pin 4 (SOT-223 only)	GROUND	Dedicated thermal/low-impedance ground; improves stability under high-current PCB layouts

Key Features

Feature	Design Value
Precision 15% V_CC threshold	Guaranteed 4.0–4.24 V trip range eliminates need for external resistor divider calibration
Factory-trimmed 350 ms reset timeout	Removes external RC timing components and associated board space and tolerance drift
Internal 5 kΩ pull-up resistor	Reduces BOM count by one component; compatible with most 5V microcontroller reset inputs
Temperature-compensated reference	Maintains trip-point accuracy across -40°C to +85°C without external compensation
Low quiescent current (50 µA)	Minimizes standby power draw in battery-backed or energy-sensitive applications

Applications

Industrial PLC Controller	Legacy 68K-Based HMI Terminal
Use Scenario: Power interruption in factory-floor automation causes transient rail sag on 5V logic supplies. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to halt CPU execution until 5V rail stabilizes for ≥350 ms. Use Value: Prevents corrupted register writes or firmware jumps during brown-out recovery, ensuring deterministic restart.	Use Scenario: Cold-start of motor control interface using Motorola 68HC11 microcontroller. IC Role / Device Role / Timing Role: Generates guaranteed 350 ms power-on reset pulse synchronized to 5V rail rise time. Use Value: Meets 68HC11's minimum reset hold-time requirement without external timing capacitor.
Embedded Metering Module	Point-of-Sale Peripheral Controller
Use Scenario: Mains-powered electricity meter experiences brief AC dropout causing 5V DC rail dip. IC Role / Device Role / Timing Role: Monitors V_CC and triggers reset if voltage falls below 4.125 V (15% of 5V), holding RESET active ≥250 ms. Use Value: Ensures flash memory write integrity and real-time clock synchronization after power resumption.	Use Scenario: Thermal printer controller powered from shared 5V switcher with load transients. IC Role / Device Role / Timing Role: Detects 5V rail undershoot during high-current print head activation and asserts RESET. Use Value: Avoids firmware lockup caused by marginal V_CC during peak current events.

Industrial PLC Controller

Legacy 68K-Based HMI Terminal

Use Scenario: Power interruption in factory-floor automation causes transient rail sag on 5V logic supplies.

IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to halt CPU execution until 5V rail stabilizes for ≥350 ms.

Use Value: Prevents corrupted register writes or firmware jumps during brown-out recovery, ensuring deterministic restart.

Use Scenario: Cold-start of motor control interface using Motorola 68HC11 microcontroller.

IC Role / Device Role / Timing Role: Generates guaranteed 350 ms power-on reset pulse synchronized to 5V rail rise time.

Use Value: Meets 68HC11's minimum reset hold-time requirement without external timing capacitor.

Embedded Metering Module

Point-of-Sale Peripheral Controller

Use Scenario: Mains-powered electricity meter experiences brief AC dropout causing 5V DC rail dip.

IC Role / Device Role / Timing Role: Monitors V_CC and triggers reset if voltage falls below 4.125 V (15% of 5V), holding RESET active ≥250 ms.

Use Value: Ensures flash memory write integrity and real-time clock synchronization after power resumption.

Use Scenario: Thermal printer controller powered from shared 5V switcher with load transients.

IC Role / Device Role / Timing Role: Detects 5V rail undershoot during high-current print head activation and asserts RESET.

Use Value: Avoids firmware lockup caused by marginal V_CC during peak current events.

Equivalent & Alternatives

The following parts are listed as comparable options for similar microprocessor supervisory applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX691ACSA+	Higher integration: includes watchdog timer, manual reset input, and 1.25 V reference; 5V-only supply; 200 ms reset timeout	Required where system-level fault recovery (e.g., stuck software) is needed beyond power monitoring	Select MAX691ACSA+ when watchdog functionality and manual reset are mandatory; not drop-in due to different pinout and feature set
TPS3808G15DBVR	Adjustable threshold via external resistor; 2% accuracy; 200 ms fixed timeout; 1.8–6 V supply range	Suitable for modern low-voltage designs (e.g., 3.3V) or where precise trip-point tuning is required	Select TPS3808G15DBVR for higher accuracy or multi-rail systems; requires external resistor network and layout change

Compared with MAX691ACSA+ and TPS3808G15DBVR, the DS1233D-15+ offers lowest BOM cost and smallest footprint for fixed 5V/15% monitoring with no external components - ideal for cost-sensitive, legacy 5V microcontroller designs where watchdog or adjustable thresholds are unnecessary.

Availability

DS1233D-15+ is available at Aetrix Electronics and suitable for industrial PLC controllers, legacy 68K-based HMIs, embedded metering modules, and point-of-sale peripheral controllers requiring stable component supply and long-term obsolescence management.

Supply support for DS1233D-15+ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated, now part of Analog Devices, designs precision analog and mixed-signal ICs for industrial, automotive, and communications applications.

The DS1233D-15+ belongs to the EconoReset™ family - purpose-built for cost-effective, single-function power-supply supervision in 5V microcontroller systems without added complexity.

FAQ

What is the exact V_CC trip point range for DS1233D-15+?

The DS1233D-15+ has a guaranteed V_CC trip point range of 4.0 V to 4.24 V at +25°C, corresponding to 15% undervoltage tolerance of a nominal 5V supply. This range is specified across the full operating temperature range (-40°C to +85°C) and includes unit-to-unit variation and temperature drift. The typical trip point is 4.125 V, and the device uses a precision temperature-compensated reference to maintain accuracy without external calibration.

Does DS1233D-15+ require an external pull-up resistor on the RESET pin?

No, DS1233D-15+ includes an internal pull-up resistor of 3.75–6.25 kΩ, eliminating the need for an external component in standard 5V microcontroller interfaces. However, if stronger drive or faster rise time is required - for example, when driving multiple loads or longer traces - an external pull-up may be added in parallel. The internal resistor ensures functional operation even if no external component is used.

Can DS1233D-15+ be used with 3.3V microcontrollers?

No, DS1233D-15+ is specifically designed for 5V systems and monitors V_CC against a 15% threshold of 5V (i.e., ~4.1 V). Its trip point is not adjustable, and it does not guarantee correct operation below 4.0 V. For 3.3V applications, consider alternatives like the DS1233A-15 or TPS3808G15, which are rated for lower supply rails and offer appropriate trip points.

What is the minimum V_CC required for DS1233D-15+ to operate correctly?

DS1233D-15+ functions with V_CC as low as 1.2 V, but its voltage-monitoring accuracy and reset timing specifications are only guaranteed when V_CC is within 5.0 V ±10% (i.e., 4.5–5.5 V). Below 4.5 V, the device may assert RESET, but the trip point tolerance and 350 ms timeout are not characterized. Operation outside the recommended 5V range risks unreliable supervision behavior.

Is DS1233D-15+ pin-compatible with DS1233-15?

Yes, DS1233D-15+ and DS1233-15 share identical pinouts (TO-92 and SOT-223), electrical specifications, and functional behavior. The "D" suffix denotes the newer revision with enhanced ESD protection and tighter production testing, but both are mechanically and electrically interchangeable in existing designs without PCB changes.

DS1233D-15+ Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc./Maxim Integrated

Series:: EconoReset

Package/Case:: TO-226-3, TO-92-3 (TO-226AA)

Packaging:: Bulk

Product Status:: Active

Programmable:: Not Verified

Type:: Simple Reset/Power-On Reset

Number of Voltages Monitored:: 1

Voltage - Threshold:: 4.125V

Output:: Open Drain or Open Collector

Reset:: Active Low

Reset Timeout:: 250ms Minimum

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92-3

DS1233D-15+ FAQ

1.How can I place an order for DS1233D-15+ through Aetrix?

Please submit a Request for Quotation (RFQ) for DS1233D-15+ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for DS1233D-15+ reliable?

The price and inventory of DS1233D-15+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1233D-15+ is usually 5 days.

3.What payment methods are accepted for DS1233D-15+?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1233D-15+ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DS1233D-15+?

DS1233D-15+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DS1233D-15+ order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for DS1233D-15+?

For technical support, including DS1233D-15+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1233D-15+ requirements.

6.How does Aetrix verify that DS1233D-15+ is sourced from the original manufacturer or authorized distributors?

All DS1233D-15+ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that DS1233D-15+ meets industry standards.

7.What is the process for return or replacement of DS1233D-15+?

All DS1233D-15+ units undergo pre-shipment inspection (PSI). If there is an issue with DS1233D-15+, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The DS1233D-15+ part is unused and in its original packaging.

Return procedure for DS1233D-15+:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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