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Analog Devices Inc./Maxim Integrated DS1233AZ-10+
- Part No.:
- DS1233AZ-10+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
DS1233AZ-10+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT223-3
- Quantity:
- Payment:
- Shipping:
Inventory:687
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Product details
Overview
DS1233AZ-10+ from Maxim Integrated is a 3.3V precision voltage-monitoring microprocessor reset supervisor IC with pushbutton debouncing, 2.80–2.97V VCC trip threshold (10% tolerance), 350ms reset timeout, and internal 5kΩ pull-up resistor. It operates from -40°C to +85°C in TO-92 package and is used in embedded microcontroller systems requiring reliable power-on and manual reset control.
For engineers reviewing the DS1233AZ-10+ datasheet, DS1233AZ-10+ pinout, DS1233AZ-10+ application, or DS1233AZ-10+ equivalent, key selection considerations include VCC trip accuracy (±0.09V), reset pulse duration (250–450ms), pushbutton release detection threshold (0.3–0.8V), low 50µA operating current, and TO-92 mechanical compatibility for legacy board designs.
Technical Context
The DS1233AZ-10+ integrates a precision temperature-compensated voltage reference and comparator to monitor 3.3V supply integrity, asserting RESET when VCC drops below 2.80V and holding it active for ≥250ms after recovery. Its dual-function architecture simultaneously handles power-fail detection and external pushbutton input via the same RST pin.
It implements hardware-level switch debouncing using internal timing circuitry, generating a clean 350ms reset pulse upon pushbutton release - requiring only an external 100pF–0.01µF capacitor from RST to GND. No external pull-up is required due to its integrated 3.75–6.25kΩ resistor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Point | 2.80–2.97V (10% tolerance at 3.3V); ensures reset activation before microprocessor brownout |
| Reset Timeout | 250–450ms; guarantees stable power and processor initialization before release |
| Operating Current | 50µA; enables ultra-low-power operation in battery-backed or energy-constrained systems |
| Pushbutton Release Threshold | 0.3–0.8V; reliably detects mechanical switch release while rejecting noise |
| Internal Pull-Up | 3.75–6.25kΩ; eliminates need for external resistor in standard pushbutton interface |
| Temperature Range | -40°C to +85°C; supports industrial-grade deployment without derating |
Pinout & Package
DS1233AZ-10+ is supplied in a 3-pin TO-92 package (package code Q3+1), with leads arranged in straight-line configuration. Pin 1 = GROUND, Pin 2 = RESET (open-drain output), Pin 3 = VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | GROUND | Reference node for voltage sensing and reset output; must be low-impedance connection |
| Pin 2 | RESET | Open-drain active-low output; sinks current during reset; requires external pull-up only if driving high-current loads |
| Pin 3 | VCC | Power supply input; monitored for out-of-tolerance condition; range 1.2–5.5V |
Key Features
| Feature | Design Value |
|---|---|
| Integrated voltage reference | Temperature-compensated bandgap reference enables ±1.5% trip accuracy over full temperature range |
| Hardware debounce logic | Eliminates need for external RC network or firmware polling; reduces BOM count by one passive component |
| Single-pin pushbutton interface | RST pin serves dual role as reset output and pushbutton input - simplifies PCB routing and connector design |
| Low quiescent current | 50µA typical draw allows use in always-on monitoring circuits without measurable battery drain |
Applications
| Industrial PLC Controller | Medical Diagnostic Handheld |
|---|---|
Use Scenario: Power interruption during firmware update causes corrupted memory state. IC Role / Device Role / Timing Role: DS1233AZ-10+ asserts RESET within 100ns of VCC drop below 2.80V and holds for 350ms post-recovery to prevent partial execution. Use Value: Guarantees safe restart after brownout without requiring watchdog timer or software intervention. | Use Scenario: Clinical technician initiates emergency reset via front-panel button during sensor calibration failure. IC Role / Device Role / Timing Role: DS1233AZ-10+ detects button release (not press), debounces mechanically, and delivers precise 350ms reset pulse to MCU. Use Value: Prevents spurious resets from contact bounce; eliminates need for firmware-based debounce logic. |
| Point-of-Sale Terminal | Smart Energy Meter |
Use Scenario: Unplanned AC dropout followed by rapid restoration causes unstable rail ramp-up. IC Role / Device Role / Timing Role: DS1233AZ-10+ monitors 3.3V LDO output and delays MCU release until VCC stabilizes above 2.97V for ≥250ms. Use Value: Avoids boot failure or EEPROM write corruption during marginal power conditions. | Use Scenario: Tamper detection triggers immediate system reset to clear volatile security registers. IC Role / Device Role / Timing Role: DS1233AZ-10+ interfaces tamper switch directly to RST pin; generates deterministic reset pulse on release. Use Value: Enables hardware-enforced secure reset path independent of MCU firmware state. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326UT29D+ | Fixed 2.93V trip point; 140ms min reset timeout; SOT-23-3 package | Lacks pushbutton debounce; requires external RC or GPIO-driven reset | Choose when only power-monitoring is needed and board space is constrained |
| TPS3808G125DBVR | Adjustable trip via external divider; 200ms min timeout; 1.5µA quiescent current | No native pushbutton interface; requires separate GPIO and firmware handling | Prefer when supply voltage varies across product variants or ultra-low IQ is critical |
Compared with MAX6326UT29D+ and TPS3808G125DBVR, the DS1233AZ-10+ uniquely combines fixed-accuracy 3.3V monitoring, guaranteed 350ms reset hold, and integrated pushbutton debounce in a through-hole TO-92 package - making it optimal for cost-sensitive, legacy-compatible, and manually serviced embedded systems.
Availability
DS1233AZ-10+ is available at Aetrix Electronics and suitable for industrial control panels, medical handheld devices, point-of-sale terminals, and smart metering systems requiring stable component supply with long-term manufacturability and through-hole assembly compatibility.
Supply support for DS1233AZ-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
Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for industrial, automotive, and computing applications.
The DS1233A family was developed specifically for cost-effective, single-chip microprocessor reset supervision in resource-constrained embedded systems where reliability, simplicity, and through-hole serviceability are prioritized.
FAQ
What is the exact VCC trip voltage range for DS1233AZ-10+?
The DS1233AZ-10+ has a guaranteed VCC trip point of 2.80V to 2.97V at 3.3V nominal supply (10% tolerance). This range is specified over the full operating temperature range (-40°C to +85°C) and is enabled by an internal precision temperature-compensated voltage reference. The DS1233AZ-10+ uses this threshold to assert RESET immediately upon supply droop and maintain it until stable recovery.
Does DS1233AZ-10+ require an external pull-up resistor on the RESET pin?
No, DS1233AZ-10+ includes an internal pull-up resistor of 3.75–6.25kΩ, eliminating the need for an external component in standard applications. An external pull-up is only required if driving higher-current loads (>8mA sink capability) or interfacing with non-3.3V logic families. The DS1233AZ-10+ datasheet confirms this internal resistor enables direct connection to most microcontroller reset inputs.
How does DS1233AZ-10+ handle pushbutton reset functionality?
The DS1233AZ-10+ uses the RESET pin for both output and input: it monitors for a low-going edge indicating button press, debounces internally for 250–450ms, then asserts RESET low for 350ms upon detecting button release. A 100pF–0.01µF capacitor from RST to GND is mandatory for proper operation. This dual-role design is unique to the DS1233AZ-10+ and avoids needing a separate GPIO line.
What package type is DS1233AZ-10+ supplied in, and is it RoHS-compliant?
DS1233AZ-10+ is supplied in a 3-pin TO-92 package (package code Q3+1), lead (Pb)-free and RoHS-compliant per Maxim's standard qualification. The device meets JEDEC J-STD-020 moisture sensitivity level 1 and is rated for soldering at 260°C for 10 seconds. This through-hole package supports manual rework and legacy wave-solder processes - a key differentiator versus SMT-only alternatives.
Can DS1233AZ-10+ monitor supplies other than 3.3V?
Yes, DS1233AZ-10+ operates with VCC from 1.2V to 5.5V, but its voltage-monitoring function is optimized for 3.3V systems: the 2.80–2.97V trip window is fixed and calibrated for that nominal rail. While it will power up and assert RESET at lower VCC, accurate brownout detection outside 3.3V ±10% is not guaranteed. For 5V or adjustable monitoring, other members of the DS1233 family (e.g., DS1233-10) or programmable supervisors should be selected instead of DS1233AZ-10+
DS1233AZ-10+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- EconoReset
- Package/Case:
- TO-261-4, TO-261AA
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.88V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 250ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223-3
DS1233AZ-10+ FAQ
1.How can I place an order for DS1233AZ-10+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1233AZ-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 DS1233AZ-10+ reliable?
The price and inventory of DS1233AZ-10+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1233AZ-10+ is usually 5 days.
3.What payment methods are accepted for DS1233AZ-10+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1233AZ-10+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1233AZ-10+?
DS1233AZ-10+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1233AZ-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 DS1233AZ-10+?
For technical support, including DS1233AZ-10+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1233AZ-10+ requirements.
6.How does Aetrix verify that DS1233AZ-10+ is sourced from the original manufacturer or authorized distributors?
All DS1233AZ-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 DS1233AZ-10+ meets industry standards.
7.What is the process for return or replacement of DS1233AZ-10+?
All DS1233AZ-10+ units undergo pre-shipment inspection (PSI). If there is an issue with DS1233AZ-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 DS1233AZ-10+ part is unused and in its original packaging.
Return procedure for DS1233AZ-10+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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