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Analog Devices Inc./Maxim Integrated DS1233A-10
- Part No.:
- DS1233A-10
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
DS1233A-10.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,272
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Product details
Overview
DS1233A-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, 350ms reset pulse width, and internal 5kΩ pull-up resistor. It ensures reliable power-on/off sequencing and manual reset in embedded microcontroller systems.
For engineers reviewing the DS1233A-10 datasheet, DS1233A-10 pinout, DS1233A-10 application, or DS1233A-10 equivalent, key selection criteria include VCC trip accuracy (±10% at 3.3V), guaranteed 350ms reset hold time after power recovery or button release, pushbutton debounce capability, and TO-92/SOT-223 package compatibility.
Technical Context
The DS1233A-10 integrates a precision temperature-compensated voltage reference and comparator to monitor VCC against a fixed 2.80–2.97V threshold. It asserts an open-drain RESET signal during undervoltage or pushbutton activation, holding it active for 250–450ms (typ. 350ms).
Its dual-function architecture supports both power-fail detection and external pushbutton reset: the RST pin serves as both output and input-detecting low-going edges for button press and generating a debounced 350ms active-low reset pulse upon release, requiring only a 100pF–0.01μF capacitor to ground.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Point | 2.80–2.97V (10% tolerance at 3.3V); ensures reset assertion before microprocessor brownout |
| Reset Pulse Width | 250–450ms (typ. 350ms); provides sufficient stabilization time for 3.3V MCU power rails and core logic |
| Operating Current | 50μA max; enables ultra-low-power operation in battery-backed or energy-constrained systems |
| Pushbutton Detect Threshold | 0.8–2.0V; reliably senses mechanical switch closure while rejecting noise and contact bounce |
| Internal Pull-Up Resistor | 3.75–6.25kΩ; eliminates need for external pull-up in basic pushbutton interface configurations |
| Temperature Range | -40°C to +85°C; supports industrial-grade operation without derating |
Pinout & Package
DS1233A-10 is available in TO-92 (3-pin) and SOT-223 (4-pin) packages. The TO-92 variant uses pins 1 (GND), 2 (RESET), 3 (VCC); the SOT-223 adds pin 4 (GND) for improved thermal and grounding performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PIN 1 (TO-92) / PIN 1 (SOT-223) | GROUND | Primary ground reference for voltage sensing and reset logic; connects to system GND plane |
| PIN 2 (TO-92) / PIN 2 (SOT-223) | RESET | Open-drain active-low reset output; also accepts external pushbutton input for debounced manual reset |
| PIN 3 (TO-92) / PIN 3 (SOT-223) | VCC | Power supply input; monitored for 2.80–2.97V trip point; powers internal reference and comparator |
| PIN 4 (SOT-223 only) | GROUND | Dedicated second ground terminal; enhances noise immunity and thermal dissipation in surface-mount layouts |
Key Features
| Feature | Design Value |
|---|---|
| 350ms guaranteed reset hold time | Ensures stable power rail and microprocessor clock lock-in before release, eliminating boot failures |
| Integrated pushbutton debounce | Eliminates external RC networks or firmware polling; reduces BOM count and layout complexity |
| Precision 10% VCC monitoring at 3.3V | Matches modern low-voltage MCU supply tolerances without calibration or trimming components |
| Internal 5kΩ pull-up resistor | Supports direct connection of momentary switch to RST pin without discrete pull-up, saving board space |
| −40°C to +85°C operating range | Validated for use in uncontrolled industrial environments without thermal margin compromise |
Applications
| Industrial PLC Controller | Medical Diagnostic Handheld |
|---|---|
Use Scenario: Power cycling during field firmware updates and sensor calibration sequences. IC Role / Device Role / Timing Role: Voltage supervisor and hardware reset initiator ensuring deterministic MCU restart after VCC interruption. Use Value: Prevents corrupted flash writes by enforcing 350ms post-power-stabilization delay before processor execution resumes. | Use Scenario: Battery-powered portable device requiring manual reset after ESD-induced lockup. IC Role / Device Role / Timing Role: Debounced pushbutton interface and supply monitor providing single-pin reset control. Use Value: Eliminates need for external debounce circuitry while guaranteeing clean 350ms reset pulse regardless of switch bounce duration. |
| Smart Energy Meter | Automotive Body Control Module (BCM) |
Use Scenario: Mains-to-battery switchover during grid outage with real-time metering continuity. IC Role / Device Role / Timing Role: Dual-role supervisor detecting 3.3V rail collapse and asserting reset to preserve EEPROM state. Use Value: Accurate 2.80–2.97V trip point prevents premature reset during transient sags, improving measurement reliability. | Use Scenario: Cold-cranking condition where 12V supply dips below regulator dropout, causing 3.3V rail instability. IC Role / Device Role / Timing Role: VCC monitor for 3.3V domain with fast 100ns response to undervoltage events. Use Value: tRPD ≤ 100ns ensures immediate reset assertion during rapid VCC falloff, protecting CAN/LIN communication integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809SEUR+T | Fixed 3.08V reset threshold; no pushbutton debounce; SOT-23-3 package | Lacks manual reset functionality; requires external circuitry for button interface | Choose when only power-monitoring reset is needed and board space is constrained |
| TPS3808G12DBVR | Adjustable reset threshold via external resistor divider; 200ms min reset timeout; higher quiescent current (8μA vs 50μA) | Supports custom trip points but adds component count and layout overhead | Prefer when system requires non-standard VCC monitoring (e.g., 2.5V or 1.8V rails) |
Compared with MAX809SEUR+T and TPS3808G12DBVR, the DS1233A-10 uniquely combines precise 3.3V ±10% monitoring, integrated pushbutton debounce, and ultra-low 50μA supply current in a dual-package option-making it optimal for cost-sensitive, space-constrained industrial microcontrollers needing both power and manual reset assurance.
Availability
DS1233A-10 is available at Aetrix Electronics and suitable for industrial automation controllers, medical handheld diagnostics, smart energy meters, and automotive body electronics requiring stable component supply across extended production lifecycles.
Supply support for DS1233A-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, computing, and communications applications.
The DS1233A-10 belongs to the EconoReset family-engineered specifically for cost-effective, high-reliability power monitoring and reset control in 3.3V microprocessor systems with minimal external components.
FAQ
What is the exact VCC trip voltage range for DS1233A-10?
The DS1233A-10 has a guaranteed VCC trip point of 2.80V (min), 2.88V (typ), and 2.97V (max) at 3.3V nominal supply-corresponding to ±10% tolerance. This range is validated across −40°C to +85°C and ensures reliable reset assertion before most 3.3V microprocessors enter undefined operating states.
Does DS1233A-10 require an external capacitor for pushbutton operation?
Yes, DS1233A-10 requires a capacitor of 100pF to 0.01μF connected between the RST pin and ground for proper pushbutton debounce. This capacitor filters switch bounce and enables the internal timer to generate a clean 350ms reset pulse upon button release-no external timing components beyond this capacitor are needed.
Can DS1233A-10 be used with 5V microcontrollers?
No, DS1233A-10 is specified only for 3.3V systems with a 2.80–2.97V trip point. For 5V applications, Maxim offers DS1233-10 (4.25–4.49V trip) or DS1233-15 (4.0–4.24V trip). Using DS1233A-10 on a 5V rail would result in continuous reset assertion due to overvoltage detection.
What is the function of pin 4 in the SOT-223 package of DS1233A-10?
In the SOT-223 package, pin 4 of DS1233A-10 is a dedicated ground terminal-electrically identical to pin 1 but provided for enhanced thermal conduction and lower impedance return path. It must be connected to system ground, especially in high-noise or thermally demanding PCB layouts.
How does DS1233A-10 handle rapid VCC transients during power-up?
DS1233A-10 responds to VCC transients with ≤100ns propagation delay (tRPD) from undervoltage detection to RESET assertion. Its internal comparator and reference ensure monotonic trip behavior, and the 350ms reset hold time prevents premature release during supply settling-critical for stable microcontroller initialization.
DS1233A-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:
- 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:
- Through Hole
- Supplier Device Package:
- TO-92-3
DS1233A-10 FAQ
1.How can I place an order for DS1233A-10 through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1233A-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 DS1233A-10 reliable?
The price and inventory of DS1233A-10 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1233A-10 is usually 5 days.
3.What payment methods are accepted for DS1233A-10?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1233A-10 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1233A-10?
DS1233A-10 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1233A-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 DS1233A-10?
For technical support, including DS1233A-10 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1233A-10 requirements.
6.How does Aetrix verify that DS1233A-10 is sourced from the original manufacturer or authorized distributors?
All DS1233A-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 DS1233A-10 meets industry standards.
7.What is the process for return or replacement of DS1233A-10?
All DS1233A-10 units undergo pre-shipment inspection (PSI). If there is an issue with DS1233A-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 DS1233A-10 part is unused and in its original packaging.
Return procedure for DS1233A-10:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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