Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Analog Devices Inc./Maxim Integrated DS1233A-15+

Name: DS1233A-15+
Brand: Analog Devices Inc./Maxim Integrated
SKU: DS1233A-15+
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: DS1233A-15+

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Supervisors

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

Datasheet:: DS1233A-15+.pdf

Description:: IC SUPERVISOR 1 CHANNEL TO92-3

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:910

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

DS1233A-15+ from Maxim Integrated is a 3.3V precision voltage-monitoring microprocessor reset supervisor IC with 15% V_CC trip point (2.64–2.80 V), 350ms reset timeout, internal 5kΩ pull-up resistor, pushbutton debounce, and -40°C to +85°C operation. It ensures reliable power-on and brownout reset for embedded microcontrollers in industrial control and instrumentation systems.

For engineers reviewing the DS1233A-15+ datasheet, DS1233A-15+ pinout, DS1233A-15+ application, or DS1233A-15+ equivalent, key selection criteria include V_CC trip accuracy, reset pulse duration, pushbutton interface compatibility, operating temperature range, and TO-92/SOT-223 package options.

Technical Context

The DS1233A-15+ integrates a precision temperature-compensated voltage reference and comparator to monitor 3.3V supply rails, asserting RESET when V_CC drops below 2.64 V (min) and holding it active for 250–450 ms after recovery. Its dual-function architecture simultaneously handles power-fail detection and external pushbutton reset with hardware debouncing.

Unlike basic reset ICs, DS1233A-15+ uses the RST pin bidirectionally: as an open-drain output during power monitoring and as a monitored input for pushbutton release detection, requiring only a 100pF–0.01µF capacitor to ground for proper edge detection and timing.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Trip Point	2.64–2.80 V (15% tolerance on 3.3V rail; enables precise brownout detection before microcontroller malfunction)
Reset Timeout	250–450 ms (guarantees stable power and processor initialization before release)
Operating Temp	-40°C to +85°C (supports industrial-grade deployment without derating)
Supply Current	50 µA (enables low-power always-on monitoring in battery-backed systems)
Output Drive	8 mA sink at 0.4 V (drives standard logic inputs and supports RC-filtered reset lines)
Internal Pull-Up	3.75–6.25 kΩ (eliminates external resistor for basic pushbutton interface)
Pushbutton Detect	0.8–2.0 V threshold (rejects noise while reliably sensing mechanical switch closure)

Pinout & Package

DS1233A-15+ 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 reference node for voltage sensing and reset output; must be low-impedance connection to system ground plane
Pin 2 (TO-92) / Pin 2 (SOT-223)	RESET	Open-drain active-low reset output; also serves as pushbutton sense input during non-reset state
Pin 3 (TO-92) / Pin 3 (SOT-223)	V_CC	Power supply input; monitored for out-of-tolerance condition; requires local 0.1 µF bypass capacitor
Pin 4 (SOT-223 only)	GROUND	Secondary ground terminal; improves thermal dissipation and reduces ground bounce in high-noise environments

Key Features

Feature	Design Value
Bidirectional RST pin	Enables single-pin pushbutton interface without external logic or GPIO usage
Hardware debounce timer	250–450 ms internal timing eliminates need for software polling or RC filters
Temperature-compensated reference	Ensures ±1% trip point stability over full -40°C to +85°C range
Low quiescent current	50 µA operation allows integration into always-on supervisory circuits without battery drain
Integrated 5kΩ pull-up	Reduces BOM count by eliminating external resistor for basic pushbutton configuration

Applications

Industrial PLC I/O Modules	Medical Diagnostic Handhelds
Use Scenario: Power cycling during field maintenance or battery replacement in programmable logic controller modules. IC Role / Device Role / Timing Role: DS1233A-15+ provides guaranteed 350ms reset hold time after V_CC recovery to prevent firmware corruption during unstable rail conditions. Use Value: Eliminates spurious resets caused by slow-rising 3.3V supplies and ensures deterministic boot sequence across temperature extremes.	Use Scenario: User-initiated reset via tactile button during diagnostic mode in portable ultrasound or ECG devices. IC Role / Device Role / Timing Role: DS1233A-15+ debounces mechanical switch closure and generates clean 350ms reset pulse on release-no firmware intervention required. Use Value: Prevents multiple unintended reboots from contact bounce and guarantees single, reliable reset event per button press.
Smart Energy Meters	Automotive Body Control Modules
Use Scenario: Brownout detection during grid voltage sags or capacitor discharge in utility metering units. IC Role / Device Role / Timing Role: DS1233A-15+ monitors 3.3V rail with 15% tolerance (2.64–2.80 V) and asserts reset before MCU enters undefined state. Use Value: Maintains data integrity in flash memory and real-time clock during marginal supply conditions.	Use Scenario: Cold-cranking events where vehicle battery dips below 9V, causing 3.3V LDO output to sag transiently. IC Role / Device Role / Timing Role: DS1233A-15+ holds reset active until 3.3V stabilizes above 2.80 V and sustains it for ≥250 ms post-recovery. Use Value: Prevents partial execution of safety-critical CAN initialization routines during unstable power-up.

Industrial PLC I/O Modules

Medical Diagnostic Handhelds

Use Scenario: Power cycling during field maintenance or battery replacement in programmable logic controller modules.

IC Role / Device Role / Timing Role: DS1233A-15+ provides guaranteed 350ms reset hold time after V_CC recovery to prevent firmware corruption during unstable rail conditions.

Use Value: Eliminates spurious resets caused by slow-rising 3.3V supplies and ensures deterministic boot sequence across temperature extremes.

Use Scenario: User-initiated reset via tactile button during diagnostic mode in portable ultrasound or ECG devices.

IC Role / Device Role / Timing Role: DS1233A-15+ debounces mechanical switch closure and generates clean 350ms reset pulse on release-no firmware intervention required.

Use Value: Prevents multiple unintended reboots from contact bounce and guarantees single, reliable reset event per button press.

Smart Energy Meters

Automotive Body Control Modules

Use Scenario: Brownout detection during grid voltage sags or capacitor discharge in utility metering units.

IC Role / Device Role / Timing Role: DS1233A-15+ monitors 3.3V rail with 15% tolerance (2.64–2.80 V) and asserts reset before MCU enters undefined state.

Use Value: Maintains data integrity in flash memory and real-time clock during marginal supply conditions.

Use Scenario: Cold-cranking events where vehicle battery dips below 9V, causing 3.3V LDO output to sag transiently.

IC Role / Device Role / Timing Role: DS1233A-15+ holds reset active until 3.3V stabilizes above 2.80 V and sustains it for ≥250 ms post-recovery.

Use Value: Prevents partial execution of safety-critical CAN initialization routines during unstable power-up.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX6326–L33D3+	Fixed 3.08V trip (±2.5%), 140ms reset timeout, no pushbutton support, SOT-23-3 package	Lacks bidirectional RST and hardware debounce; requires external circuitry for manual reset	Choose when minimal footprint and fixed short timeout suffice, and pushbutton reset is handled elsewhere
TPS3808G33DBVR	3.3V trip (±0.5%), 200ms/300ms/400ms selectable timeout, no integrated pushbutton interface, 6-pin SOT-23	Higher trip accuracy but no native pushbutton sensing; requires external RC network and GPIO for manual reset	Prefer when tight V_CC threshold tolerance is critical and system-level reset control is already implemented

Compared with MAX6326–L33D3+ and TPS3808G33DBVR, DS1233A-15+ uniquely combines 15% 3.3V monitoring, 350ms factory-fixed timeout, and integrated pushbutton debounce in a 3-pin TO-92 or 4-pin SOT-223-reducing component count and firmware complexity for cost-sensitive industrial designs.

Availability

DS1233A-15+ is available at Aetrix Electronics and suitable for industrial control panels, medical handheld diagnostics, smart energy meters, and automotive body electronics requiring stable component supply and long-term lifecycle support.

Supply support for DS1233A-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, medical, and communications applications, emphasizing reliability, low power, and integration.

The DS1233A-15+ belongs to Maxim's EconoReset™ family of supervisory circuits, engineered specifically for cost-sensitive microprocessor reset and power monitoring in space-constrained, thermally demanding embedded systems.

FAQ

What is the exact V_CC trip point range for DS1233A-15+?

The DS1233A-15+ has a guaranteed V_CC trip point range of 2.64 V (min) to 2.80 V (max) at +25°C, corresponding to 15% tolerance below nominal 3.3V. This range is maintained across the full -40°C to +85°C operating temperature with temperature-compensated reference circuitry. DS1233A-15+ does not use a fixed threshold but tracks the specified tolerance band tightly.

Does DS1233A-15+ require an external capacitor on the RST pin?

Yes - DS1233A-15+ requires a capacitor between 100 pF and 0.01 µF connected from RST to ground for proper pushbutton operation. This capacitor enables edge detection and internal timing. For higher reset current drive, a minimum 500 pF capacitor plus a 1 kΩ external pull-up resistor is recommended. DS1233A-15+ will not function correctly in pushbutton mode without this capacitor.

Can DS1233A-15+ be used with a 5V microcontroller system?

No - DS1233A-15+ is strictly rated for 3.3V supply monitoring with a 15% trip window (2.64–2.80 V). Applying 5V to V_CC exceeds its absolute maximum rating of +7.0V but violates recommended DC operating conditions and risks incorrect trip behavior or damage. For 5V systems, use DS1233-15 or DS1233D-15 instead. DS1233A-15+ is incompatible with 5V rail supervision.

How does DS1233A-15+ handle pushbutton release versus press detection?

DS1233A-15+ detects pushbutton release-not press-to generate the reset pulse. It monitors the RST line for a rising edge after initial low detection, debounces the release for 250–450 ms, then forces RST low for 350 ms. Press detection alone does not trigger reset; only the release event initiates the timed pulse. DS1233A-15+ relies on this edge-triggered release behavior for noise immunity.

Is DS1233A-15+ pin-compatible with DS1233A-10?

Yes - DS1233A-15+ and DS1233A-10 share identical pinout, package dimensions, electrical interface, and timing characteristics; only the V_CC trip point differs (2.64–2.80 V vs. 2.80–2.97 V). Both operate from 1.2V to 5.5V supply, draw 50 µA, and provide 350ms reset timeout. DS1233A-15+ can be substituted for DS1233A-10 in existing layouts if the lower trip point meets system brownout requirements.

DS1233A-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:: 2.72V

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

DS1233A-15+ FAQ

1.How can I place an order for DS1233A-15+ through Aetrix?

Please submit a Request for Quotation (RFQ) for DS1233A-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 DS1233A-15+ reliable?

The price and inventory of DS1233A-15+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1233A-15+ is usually 5 days.

3.What payment methods are accepted for DS1233A-15+?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1233A-15+ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DS1233A-15+?

DS1233A-15+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DS1233A-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 DS1233A-15+?

For technical support, including DS1233A-15+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1233A-15+ requirements.

6.How does Aetrix verify that DS1233A-15+ is sourced from the original manufacturer or authorized distributors?

All DS1233A-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 DS1233A-15+ meets industry standards.

7.What is the process for return or replacement of DS1233A-15+?

All DS1233A-15+ units undergo pre-shipment inspection (PSI). If there is an issue with DS1233A-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 DS1233A-15+ part is unused and in its original packaging.

Return procedure for DS1233A-15+:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…