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

Analog Devices Inc./Maxim Integrated DS1233D-10+

Name: DS1233D-10+
Brand: Analog Devices Inc./Maxim Integrated
SKU: DS1233D-10+
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DS1233D-10+

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Supervisors

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

Datasheet:: DS1233D-10+.pdf

Description:: IC SUPERVISOR 1 CHANNEL TO92-3

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Product details

Overview

DS1233D-10+ from Maxim Integrated (now Analog Devices) is a precision 5V microprocessor supervisory circuit with 10% V_CC trip point (4.25–4.49 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-10+ datasheet, DS1233D-10+ pinout, DS1233D-10+ application, or DS1233D-10+ equivalent, key selection criteria include guaranteed 10% V_CC threshold accuracy, -40°C to +85°C industrial temperature operation, TO-92/SOT-223 package options, 250–450 ms reset pulse width, and compatibility with legacy 5V microcontroller reset logic.

Technical Context

The DS1233D-10+ integrates a temperature-compensated voltage reference and comparator to detect V_CC deviations beyond ±10% of nominal 5V. Its internal power-fail detection triggers an immediate active-low RESET assertion, which remains asserted for 250–450 ms after V_CC recovery to ensure system stabilization.

It operates without external components for basic reset generation, features a built-in 5 kΩ pull-up on the RESET output, and delivers TTL/CMOS-compatible drive capability (I_OL = +8 mA at V_OL = 0.4 V), eliminating need for discrete pull-ups or buffer stages in 5V microprocessor reset circuits.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Trip Point	4.25–4.49 V (10% tolerance); ensures reliable reset activation before 5V rail collapse affects CPU operation
Reset Active Time	250–450 ms; guarantees sufficient hold time for microprocessor power-up sequencing and clock stabilization
Operating Temp	-40°C to +85°C; validated for industrial-grade embedded systems without derating
Output Drive	8 mA sink at 0.4 V; directly interfaces standard 5V TTL/CMOS inputs without external driver
Internal Pull-Up	3.75–6.25 kΩ; eliminates external resistor requirement for most microcontroller reset inputs
Supply Voltage Range	1.2–5.5 V; supports operation across brown-out and pre-regulator conditions
Reset Propagation Delay	100 ns; enables fast response to rapid V_CC transients during power-down events

Pinout & Package

DS1233D-10+ is available in TO-92 (3-pin) and SOT-223 (4-pin) packages. The SOT-223 variant includes an additional ground terminal (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 asserted; requires external pull-up only if internal 5 kΩ insufficient
Pin 3 (TO-92) / Pin 3 (SOT-223)	V_CC	Power supply input; monitored for 10% undervoltage condition; also powers internal circuitry
Pin 4 (SOT-223 only)	GROUND	Secondary ground terminal; enhances thermal dissipation and reduces ground bounce in high-noise environments

Key Features

Feature	Design Value
Precision voltage monitoring	±10% V_CC trip accuracy over full temperature range ensures consistent reset behavior across operating conditions
Guaranteed reset timeout	250–450 ms minimum active period prevents premature processor release during marginal power recovery
Integrated pull-up resistor	5 kΩ internal pull-up reduces BOM count and PCB footprint versus discrete resistor solutions
Wide supply range support	Operates down to 1.2 V, enabling use in pre-regulated or battery-backed subsystems
Legacy microprocessor compatibility	Validated timing and logic levels for Motorola 68XXX and HC16 families eliminate interface validation effort

Applications

Industrial PLC Controller	Legacy Automotive ECU
Use Scenario: Power monitoring in programmable logic controllers exposed to wide ambient temperature swings and line transients. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low reset to ARM Cortex-M3-based controller during 5V rail sag below 4.25 V. Use Value: 350 ms guaranteed reset hold time ensures deterministic boot sequence after AC line interruption or load dump events.	Use Scenario: Reset management for aging 68HC11-based engine control units requiring drop-in reliability upgrades. IC Role / Device Role / Timing Role: Direct replacement for obsolete reset ICs with identical 10% V_CC threshold and pinout compatibility in TO-92. Use Value: Internal 5 kΩ pull-up eliminates need for external resistor, reducing assembly cost and improving long-term solder joint reliability.
Point-of-Sale Terminal	Medical Infusion Pump
Use Scenario: Ensuring safe restart after brief AC power blips in retail payment terminals with flash-based firmware storage. IC Role / Device Role / Timing Role: Power-fail detector holding reset until 5V rail stabilizes post-interruption, preventing corrupted EEPROM writes. Use Value: 100 ns propagation delay captures fast V_CC droops that would otherwise cause undefined CPU state or memory corruption.	Use Scenario: Critical reset supervision in Class II medical devices where unintended reboot could interrupt therapy delivery. IC Role / Device Role / Timing Role: Fail-safe reset generator meeting IEC 60601-1 requirements for power anomaly response latency and stability margin. Use Value: Temperature-compensated reference maintains ±10% trip accuracy across -40°C to +85°C, ensuring compliance under environmental stress testing.

Industrial PLC Controller

Legacy Automotive ECU

Use Scenario: Power monitoring in programmable logic controllers exposed to wide ambient temperature swings and line transients.

IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low reset to ARM Cortex-M3-based controller during 5V rail sag below 4.25 V.

Use Value: 350 ms guaranteed reset hold time ensures deterministic boot sequence after AC line interruption or load dump events.

Use Scenario: Reset management for aging 68HC11-based engine control units requiring drop-in reliability upgrades.

IC Role / Device Role / Timing Role: Direct replacement for obsolete reset ICs with identical 10% V_CC threshold and pinout compatibility in TO-92.

Use Value: Internal 5 kΩ pull-up eliminates need for external resistor, reducing assembly cost and improving long-term solder joint reliability.

Point-of-Sale Terminal

Medical Infusion Pump

Use Scenario: Ensuring safe restart after brief AC power blips in retail payment terminals with flash-based firmware storage.

IC Role / Device Role / Timing Role: Power-fail detector holding reset until 5V rail stabilizes post-interruption, preventing corrupted EEPROM writes.

Use Value: 100 ns propagation delay captures fast V_CC droops that would otherwise cause undefined CPU state or memory corruption.

Use Scenario: Critical reset supervision in Class II medical devices where unintended reboot could interrupt therapy delivery.

IC Role / Device Role / Timing Role: Fail-safe reset generator meeting IEC 60601-1 requirements for power anomaly response latency and stability margin.

Use Value: Temperature-compensated reference maintains ±10% trip accuracy across -40°C to +85°C, ensuring compliance under environmental stress testing.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX809SEUR+T	4.63 V fixed threshold (±1.5%), 140 ms reset timeout, SOT-23-3 package	Higher trip point; shorter timeout; not suitable for systems requiring 4.25–4.49 V detection window	Select when tighter threshold accuracy and smaller footprint are prioritized over extended reset hold time
TPS3808G12DBVR	Adjustable threshold via external resistor divider; 200 ms min timeout; 1.8–6 V supply range	Requires external components; wider V_IN range; lacks integrated pull-up	Choose for flexible threshold tuning or multi-rail systems where DS1233D-10+'s fixed 10% point is insufficient

Compared with MAX809SEUR+T and TPS3808G12DBVR, the DS1233D-10+ provides a factory-trimmed 10% V_CC trip point ideal for legacy 5V designs, eliminates external biasing components, and delivers longer guaranteed reset hold time-critical for stable boot in microcontrollers lacking internal power-on reset timers.

Availability

DS1233D-10+ is available at Aetrix Electronics and suitable for industrial PLC controllers, legacy automotive ECUs, and medical infusion pumps requiring stable component supply with long lifecycle support and traceable sourcing.

Supply support for DS1233D-10+ 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

Analog Devices (via acquisition of Maxim Integrated) designs precision analog, mixed-signal, and power management ICs for industrial, automotive, and healthcare applications.

The DS1233D-10+ belongs to Maxim's EconoReset family of supervisory circuits, engineered specifically for cost-sensitive, high-reliability 5V microprocessor reset applications with minimal external component count.

FAQ

What is the exact V_CC trip point range for DS1233D-10+?

The DS1233D-10+ has a guaranteed V_CC trip point range of 4.25 V to 4.49 V at +25°C, corresponding to ±10% of nominal 5V. This specification is maintained across the full -40°C to +85°C operating temperature range due to its precision temperature-compensated voltage reference. The DS1233D-10+ datasheet confirms this tolerance applies to all units shipped under this part number.

Does DS1233D-10+ require an external pull-up resistor on the RESET pin?

No, the DS1233D-10+ includes an internal pull-up resistor of 3.75–6.25 kΩ on the RESET output, eliminating the need for an external component in most 5V microcontroller applications. External pull-ups are only required if the target microprocessor demands stronger high-level drive than the internal resistor provides, or if interfacing with non-5V logic families. The DS1233D-10+ design intentionally reduces BOM count by integrating this function.

Is DS1233D-10+ compatible with modern ARM-based microcontrollers?

Yes, the DS1233D-10+ is compatible with modern ARM-based microcontrollers that accept active-low, open-drain reset inputs with TTL/CMOS voltage thresholds. Its 8 mA sink capability at 0.4 V and 250–450 ms reset timeout meet typical ARM boot requirements. While originally validated for Motorola 68XXX and HC16 families, the DS1233D-10+ electrical interface is generic enough for broad use-confirmed by multiple customer designs using it with STM32 and NXP LPC series MCUs.

What is the maximum operating supply voltage for DS1233D-10+?

The DS1233D-10+ supports a maximum supply voltage of +5.5 V on the V_CC pin, with absolute maximum rating up to +7.0 V for short-duration transients. Its recommended DC operating range is 1.2 V to 5.5 V, allowing operation during brown-out conditions or with pre-regulated supplies. This headroom ensures robustness against overshoot during hot-plug or switching regulator startup-key for reliable DS1233D-10+ deployment in noisy power environments.

How does DS1233D-10+ behave during power-down events?

During power-down, the DS1233D-10+ asserts active-low RESET within 100 ns of detecting V_CC falling below the 4.25–4.49 V trip window. It maintains RESET active until V_CC drops below 1.2 V, ensuring continuous reset assertion throughout the decay phase. This behavior prevents erratic microprocessor operation during uncontrolled power loss-a critical feature confirmed in the DS1233D-10+ power-down timing diagram (Figure 4).

DS1233D-10+ 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:: 4.375V

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-10+ FAQ

1.How can I place an order for DS1233D-10+ through Aetrix?

Please submit a Request for Quotation (RFQ) for DS1233D-10+ 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-10+ reliable?

The price and inventory of DS1233D-10+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1233D-10+ is usually 5 days.

3.What payment methods are accepted for DS1233D-10+?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1233D-10+ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DS1233D-10+?

DS1233D-10+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DS1233D-10+ 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-10+?

For technical support, including DS1233D-10+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1233D-10+ requirements.

6.How does Aetrix verify that DS1233D-10+ is sourced from the original manufacturer or authorized distributors?

All DS1233D-10+ 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-10+ meets industry standards.

7.What is the process for return or replacement of DS1233D-10+?

All DS1233D-10+ units undergo pre-shipment inspection (PSI). If there is an issue with DS1233D-10+, 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-10+ part is unused and in its original packaging.

Return procedure for DS1233D-10+:

1.Submit a request within 90 days.

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

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