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

Analog Devices Inc./Maxim Integrated DS1233D-15/T&R

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

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Part No.:: DS1233D-15/T&R

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Supervisors

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

Datasheet:: DS1233D-15/T&R.pdf

Description:: IC SUPERVISOR 1 CHANNEL TO92-3

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Product details

Overview

DS1233D-15/T&R 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/T&R datasheet, DS1233D-15/T&R pinout, DS1233D-15/T&R application, or DS1233D-15/T&R equivalent, key selection criteria include guaranteed 350 ms reset pulse width, ±5% trip accuracy at 5V, TO-92/SOT-223 package options, -40°C to +85°C operation, and compatibility with legacy 5V microcontroller reset logic.

Technical Context

The DS1233D-15/T&R implements a temperature-compensated voltage reference and comparator to detect V_CC droop below 4.125 V (typical), triggering an active-low RESET signal. Its internal timing circuit holds RESET asserted for 250–450 ms after V_CC recovery, ensuring stable microprocessor boot.

It operates with no external components beyond optional pushbutton support (not applicable to DS1233D-15 variant), draws only 50 µA typical quiescent current, and tolerates V_CC slew rates down to 300 µs between 4.75 V and 4.00 V without false triggering.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Trip Point	4.0–4.24 V (15% tolerance); ensures reliable reset assertion before 5V rail collapse affects CPU operation
Reset Pulse Width	250–450 ms (typ. 350 ms); guarantees sufficient stabilization time for 5V microcontrollers post-power-up
Supply Voltage Range	1.2–5.5 V; supports operation across brown-out and nominal 5V conditions
Output Drive	8 mA sink capability at 0.4 V; directly interfaces with TTL/CMOS reset inputs without external buffer
Quiescent Current	50 µA max; enables low-power system monitoring in battery-backed or standby modes
Operating Temp	-40°C to +85°C; qualified for industrial-grade embedded control environments
Internal Pull-Up	3.75–6.25 kΩ on RESET; eliminates need for external pull-up resistor in most 5V designs

Pinout & Package

DS1233D-15/T&R is available in SOT-223 surface-mount package (4-pin) and TO-92 through-hole package (3-pin). The /T&R suffix denotes tape-and-reel packaging for automated assembly.

Pin/Terminal	Circuit Role	Design Meaning
PIN 1	GROUND	Reference node for voltage sensing and output stage; must be low-impedance connection to system ground plane
PIN 2	RESET	Active-low open-drain reset output; sinks current to assert reset on connected microprocessor's /RESET pin
PIN 3	V_CC	Power supply input and monitoring node; supplies internal circuitry and provides reference for trip detection
PIN 4 (SOT-223 only)	GROUND	Second ground terminal for thermal and noise performance; electrically tied to PIN 1 internally

Key Features

Feature	Design Value
15% V_CC trip accuracy	Guarantees reset activation before 5V supply drops below 4.0 V, preventing CPU lockup during brown-out
350 ms factory-trimmed reset timeout	Eliminates need for external RC timing network; ensures consistent boot sequencing across production units
Internal 5 kΩ pull-up on RESET	Reduces BOM count and PCB area; compatible with standard 5V microprocessor /RESET input thresholds
Temperature-compensated reference	Maintains trip point stability over -40°C to +85°C; avoids recalibration or derating in industrial environments
Low 50 µA operating current	Enables continuous supervision in always-on subsystems without impacting system power budget

Applications

Industrial PLC Controller	Legacy 5V Embedded Instrumentation
Use Scenario: Power monitoring in programmable logic controllers exposed to fluctuating 5V rails in factory automation cabinets. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low reset to ARM7 or 68HC11 microcontrollers during AC line sags. Use Value: Prevents corrupted firmware execution by guaranteeing 350 ms reset hold time after 5V recovery, aligning with CPU reset timing requirements.	Use Scenario: Reset management in medical diagnostic equipment using aging 5V microcontrollers with strict power-up sequencing. IC Role / Device Role / Timing Role: Voltage monitor and reset generator interfacing directly to HC16-series processor /RESET input. Use Value: Internal 5 kΩ pull-up and 4.125 V trip point ensure compatibility with legacy 5V logic families without external components.
Point-of-Sale Terminal	Telecom Line Card
Use Scenario: Ensuring clean boot after brief 5V interruptions caused by shared power supplies in retail kiosks. IC Role / Device Role / Timing Role: Brown-out detector and timed reset source for Intel 80C188-based main controller. Use Value: 250–450 ms reset window accommodates variable 5V rail rise times while avoiding premature release.	Use Scenario: Supervising 5V auxiliary power in carrier-grade line cards where hot-swap events cause transient dips. IC Role / Device Role / Timing Role: Fault-detection interface between power management ASIC and TMS320C54x DSP reset input. Use Value: Temperature-stable 15% trip threshold prevents spurious resets during thermal cycling in sealed chassis.

Industrial PLC Controller

Legacy 5V Embedded Instrumentation

Use Scenario: Power monitoring in programmable logic controllers exposed to fluctuating 5V rails in factory automation cabinets.

IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low reset to ARM7 or 68HC11 microcontrollers during AC line sags.

Use Value: Prevents corrupted firmware execution by guaranteeing 350 ms reset hold time after 5V recovery, aligning with CPU reset timing requirements.

Use Scenario: Reset management in medical diagnostic equipment using aging 5V microcontrollers with strict power-up sequencing.

IC Role / Device Role / Timing Role: Voltage monitor and reset generator interfacing directly to HC16-series processor /RESET input.

Use Value: Internal 5 kΩ pull-up and 4.125 V trip point ensure compatibility with legacy 5V logic families without external components.

Point-of-Sale Terminal

Telecom Line Card

Use Scenario: Ensuring clean boot after brief 5V interruptions caused by shared power supplies in retail kiosks.

IC Role / Device Role / Timing Role: Brown-out detector and timed reset source for Intel 80C188-based main controller.

Use Value: 250–450 ms reset window accommodates variable 5V rail rise times while avoiding premature release.

Use Scenario: Supervising 5V auxiliary power in carrier-grade line cards where hot-swap events cause transient dips.

IC Role / Device Role / Timing Role: Fault-detection interface between power management ASIC and TMS320C54x DSP reset input.

Use Value: Temperature-stable 15% trip threshold prevents spurious resets during thermal cycling in sealed chassis.

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	3.08 V fixed trip point; 140 ms reset timeout; SOT-23-3 package; no internal pull-up	Designed for 3.3V systems; shorter reset pulse requires external timing adjustment for 5V CPU compatibility	Select when migrating to 3.3V designs or space-constrained layouts where SOT-23 footprint is mandatory
TPS3808G15DBVR	Adjustable trip via external resistor; 200 ms min reset timeout; 1.5 µA quiescent current; no internal pull-up	Requires external resistor network for 4.125 V setting; ultra-low IQ suits battery-powered applications	Choose for flexible voltage monitoring or energy-sensitive systems where external component count is acceptable

Compared with MAX809SEUR+T and TPS3808G15DBVR, DS1233D-15/T&R delivers fixed 4.125 V trip and factory-trimmed 350 ms reset-optimized for drop-in replacement in legacy 5V microcontroller designs without layout or firmware changes.

Availability

DS1233D-15/T&R is available at Aetrix Electronics and suitable for industrial PLC controllers, legacy 5V instrumentation, point-of-sale terminals, and telecom line cards requiring stable component supply and long-term obsolescence mitigation.

Supply support for DS1233D-15/T&R 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, power integrity, and real-time control applications.

The DS1233D-15/T&R belongs to Maxim's EconoReset™ family-engineered specifically for cost-sensitive, 5V microprocessor reset supervision in industrial and embedded systems where reliability and simplicity are critical.

FAQ

What is the exact V_CC trip point range for DS1233D-15/T&R?

The DS1233D-15/T&R has a guaranteed V_CC trip point range of 4.0 V to 4.24 V at 25°C, corresponding to the 15% tolerance specification for 5V systems. This range is maintained across the full -40°C to +85°C operating temperature with temperature compensation, ensuring consistent brown-out detection without calibration.

Does DS1233D-15/T&R require an external pull-up resistor on the RESET pin?

No, DS1233D-15/T&R includes an internal pull-up resistor of 3.75–6.25 kΩ on the RESET pin, eliminating the need for an external component in standard 5V microcontroller interfaces. This simplifies design and reduces BOM count while maintaining compatibility with TTL/CMOS input thresholds.

What is the reset timeout duration of DS1233D-15/T&R and how is it controlled?

The DS1233D-15/T&R provides a factory-trimmed reset timeout of 250–450 ms (typ. 350 ms) after V_CC returns to tolerance. This timing is generated by an internal RC network and requires no external components-ensuring repeatable, production-ready reset behavior across all units of DS1233D-15/T&R.

Which microprocessor families is DS1233D-15/T&R explicitly compatible with?

DS1233D-15/T&R is explicitly designed for compatibility with Motorola 68XXX series and HC16 microprocessors, as confirmed in its official datasheet. Its active-low open-drain RESET output, 5V trip point, and timing profile match the reset input requirements of these legacy 5V architectures without modification.

Is DS1233D-15/T&R available in both through-hole and surface-mount packages?

Yes, DS1233D-15/T&R is offered in both TO-92 (3-pin) and SOT-223 (4-pin) packages. The SOT-223 variant includes a dedicated second ground pin (PIN 4) for improved thermal dissipation and noise immunity, while the TO-92 version uses a 3-pin configuration with shared ground.

DS1233D-15/T&R Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc./Maxim Integrated

Series:: EconoReset

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

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

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/T&R FAQ

1.How can I place an order for DS1233D-15/T&R through Aetrix?

Please submit a Request for Quotation (RFQ) for DS1233D-15/T&R 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/T&R reliable?

The price and inventory of DS1233D-15/T&R 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/T&R is usually 5 days.

3.What payment methods are accepted for DS1233D-15/T&R?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1233D-15/T&R transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DS1233D-15/T&R?

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

Once your DS1233D-15/T&R 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/T&R?

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

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

All DS1233D-15/T&R 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/T&R meets industry standards.

7.What is the process for return or replacement of DS1233D-15/T&R?

All DS1233D-15/T&R units undergo pre-shipment inspection (PSI). If there is an issue with DS1233D-15/T&R, 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/T&R part is unused and in its original packaging.

Return procedure for DS1233D-15/T&R:

1.Submit a request within 90 days.

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

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