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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

Quantity:: RFQ Add To RFQ list

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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 pulse width, 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 reset timeout duration, temperature-compensated voltage threshold accuracy, TO-92/SOT-223 package compatibility, and absence of external timing components.

Technical Context

The DS1233D-10 integrates a precision temperature-compensated voltage reference and comparator to detect V_CC deviations against its 10% tolerance band (4.25–4.49 V). Its internal power-fail detection logic forces RESET low on undervoltage and holds it active for 250–450 ms after recovery.

It operates across –40°C to +85°C, draws ≤50 µA quiescent current, and features a 0.4 V max VOL at 8 mA sink capability. The device requires no external capacitors or resistors for basic reset generation, reducing BOM count in space-constrained designs.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Trip Point	4.25–4.49 V (10% tolerance); ensures reliable reset assertion before 5V rail collapse affects CPU operation
Reset Pulse Width	250–450 ms typ. 350 ms; guarantees full microprocessor stabilization post-power-up
Supply Voltage Range	1.2–5.5 V; supports operation during brown-out and battery-backed backup modes
Output Sink Current	8 mA @ 0.4 V; directly drives TTL/CMOS inputs without external buffer
Operating Temp	–40°C to +85°C; validated for industrial-grade embedded controller environments
Internal Pull-Up	3.75–6.25 kΩ; eliminates need for external resistor on RESET line
Quiescent Current	50 µA max; enables low-power system monitoring in always-on applications

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 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	Open-drain active-low output; sinks current to assert reset on microprocessor reset input
Pin 3 (TO-92) / Pin 3 (SOT-223)	V_CC	Power supply input; monitored rail; also powers internal reference and comparator circuitry
Pin 4 (SOT-223 only)	GROUND	Secondary ground terminal; improves thermal dissipation and reduces ground bounce in high-noise systems

Key Features

Feature	Design Value
Precision voltage monitoring	Temperature-compensated reference ensures ±1% trip point stability over –40°C to +85°C
Guaranteed reset timeout	250–450 ms window meets JEDEC JESD78 reliability requirements for processor initialization
No external timing components	Monolithic RC timing eliminates capacitor aging, drift, and PCB footprint overhead
Low-power supervision	50 µA max ICC enables use in battery-backed real-time clock and watchdog subsystems
Microprocessor compatibility	Active-low open-drain output matches reset input requirements of Motorola 68XXX and HC16 families

Applications

Industrial PLC Controller	Point-of-Sale Terminal
Use Scenario: Power interruption during firmware update or I/O scan cycle risks corrupted memory or stuck outputs. IC Role / Device Role / Timing Role: DS1233D-10 monitors 5V rail and asserts RESET for ≥350 ms after recovery to ensure clean CPU restart and register reinitialization. Use Value: Prevents inconsistent state transitions by guaranteeing full microcontroller reset before instruction fetch resumes.	Use Scenario: Unplanned AC loss or battery depletion during transaction processing may leave payment interface in undefined state. IC Role / Device Role / Timing Role: DS1233D-10 detects 5V rail sag below 4.25 V and holds RESET active until stable power returns and settles for 350 ms. Use Value: Eliminates need for software-based reset polling, reducing firmware complexity and boot-time latency.
Medical Diagnostic Sensor Hub	Smart Energy Meter
Use Scenario: Transient grid fluctuations cause intermittent sensor data corruption or false alarm triggers. IC Role / Device Role / Timing Role: DS1233D-10 provides deterministic power-fail warning via RST assertion prior to V_CC collapse, enabling graceful shutdown of ADC and memory buffers. Use Value: Enables last-gasp data save to nonvolatile storage before power loss, meeting IEC 62304 safety-critical logging requirements.	Use Scenario: Mains voltage sags during peak load periods disrupt metrology IC synchronization and timekeeping accuracy. IC Role / Device Role / Timing Role: DS1233D-10 monitors 5V supply derived from isolated DC-DC converter and initiates controlled meter reset upon sustained undervoltage. Use Value: Maintains billing integrity by preventing partial energy accumulation cycles during unstable supply conditions.

Industrial PLC Controller

Point-of-Sale Terminal

Use Scenario: Power interruption during firmware update or I/O scan cycle risks corrupted memory or stuck outputs.

IC Role / Device Role / Timing Role: DS1233D-10 monitors 5V rail and asserts RESET for ≥350 ms after recovery to ensure clean CPU restart and register reinitialization.

Use Value: Prevents inconsistent state transitions by guaranteeing full microcontroller reset before instruction fetch resumes.

Use Scenario: Unplanned AC loss or battery depletion during transaction processing may leave payment interface in undefined state.

IC Role / Device Role / Timing Role: DS1233D-10 detects 5V rail sag below 4.25 V and holds RESET active until stable power returns and settles for 350 ms.

Use Value: Eliminates need for software-based reset polling, reducing firmware complexity and boot-time latency.

Medical Diagnostic Sensor Hub

Smart Energy Meter

Use Scenario: Transient grid fluctuations cause intermittent sensor data corruption or false alarm triggers.

IC Role / Device Role / Timing Role: DS1233D-10 provides deterministic power-fail warning via RST assertion prior to V_CC collapse, enabling graceful shutdown of ADC and memory buffers.

Use Value: Enables last-gasp data save to nonvolatile storage before power loss, meeting IEC 62304 safety-critical logging requirements.

Use Scenario: Mains voltage sags during peak load periods disrupt metrology IC synchronization and timekeeping accuracy.

IC Role / Device Role / Timing Role: DS1233D-10 monitors 5V supply derived from isolated DC-DC converter and initiates controlled meter reset upon sustained undervoltage.

Use Value: Maintains billing integrity by preventing partial energy accumulation cycles during unstable supply conditions.

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	Fixed 3.08 V reset threshold; 140 ms min reset pulse; SOT-23-3 package	Designed for 3.3V systems; shorter timeout insufficient for full 5V CPU stabilization	Select only if migrating to 3.3V domain and verifying reset timing margin with target MCU
TPS3808G12DBVR	Adjustable threshold via external resistor; 200 ms min reset pulse; 1.5 µA quiescent current	Requires external components for 5V monitoring; lower IQ benefits battery life but adds design complexity	Prefer when programmable trip point or ultra-low power is mandatory; not drop-in for DS1233D-10

Compared with MAX809SEUR+T and TPS3808G12DBVR, the DS1233D-10 delivers fixed 10%-tolerance 5V supervision with guaranteed 350 ms reset hold time in TO-92/SOT-223 - eliminating calibration effort and ensuring robust startup in legacy 5V industrial controllers.

Availability

DS1233D-10 is available at Aetrix Electronics and suitable for industrial PLC controllers, point-of-sale terminals, medical sensor hubs, and smart energy meters requiring stable component supply and long-term lifecycle support.

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 high-performance analog, mixed-signal, and power management ICs for precision sensing, signal conditioning, and system-level reliability.

The DS1233D-10 belongs to the EconoReset™ family of supervisory circuits engineered specifically for cost-sensitive, 5V microprocessor-based systems needing deterministic power-on reset and brown-out protection without external components.

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, corresponding to a nominal 10% tolerance around 5 V. This specification is tested and characterized across –40°C to +85°C and is enabled by an internal precision temperature-compensated voltage reference. The DS1233D-10 uses this threshold to assert RESET when the monitored 5V rail falls outside this band.

Does DS1233D-10 require external components to function?

No, the DS1233D-10 operates autonomously with no external timing capacitors or pull-up resistors required. It integrates a 5 kΩ internal pull-up resistor on the RESET pin and monolithic timing circuitry. A 1 kΩ external resistor may be needed only if interfacing with certain microprocessors requiring stronger drive strength - per Note 2 in the datasheet. The DS1233D-10 is designed for minimal BOM count in space-constrained applications.

What package options are available for DS1233D-10?

The DS1233D-10 is offered in both TO-92 (3-pin) and SOT-223 (4-pin) packages. The TO-92 version uses Pins 1–3 for GROUND, RESET, and V_CC; the SOT-223 adds Pin 4 as a second GROUND terminal for enhanced thermal performance and noise immunity. Mechanical drawings for both packages are published in the Maxim Integrated (now Analog Devices) website documentation section.

How long does DS1233D-10 hold RESET active after power recovery?

The DS1233D-10 holds the RESET signal active for 250–450 ms after V_CC returns to within its 10% trip band, with a typical value of 350 ms. This guaranteed minimum timeout ensures sufficient time for the 5V power supply and connected microprocessor to stabilize before release. The DS1233D-10 achieves this using internal RC timing, eliminating variance from external component tolerances.

Is DS1233D-10 compatible with modern 3.3V microcontrollers?

The DS1233D-10 is specified for 5V systems with a 4.25–4.49 V trip point and is not intended for direct use with 3.3V microcontrollers. Its V_CC operating range (1.2–5.5 V) allows connection to 3.3V supplies, but the trip threshold remains fixed at ~4.3 V - too high for reliable 3.3V brown-out detection. For 3.3V applications, consider the DS1233A-10 (2.8–2.97 V trip) or other members of the EconoReset family. The DS1233D-10 is optimized for legacy 5V designs.

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:: Obsolete

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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