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Analog Devices Inc./Maxim Integrated DS1233MS-3+T&R
- Part No.:
- DS1233MS-3+T&R
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DS1233MS-3+T&R.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,744
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Product details
Overview
DS1233MS-3+T&R from Maxim Integrated (now Analog Devices) is a precision voltage-monitoring microprocessor supervisory circuit in 8-pin SOIC package, featuring 2.72 V nominal VCC trip point, 350 ms reset pulse width, and active-low open-drain RST output with internal 5 kΩ pullup resistor. It monitors power supply integrity for Motorola 68XXX and HC16 microprocessors in embedded control systems.
For engineers reviewing the DS1233MS-3+T&R datasheet, DS1233MS-3+T&R pinout, DS1233MS-3+T&R application, or DS1233MS-3+T&R equivalent, key selection criteria include trip threshold accuracy (±0.08 V), guaranteed reset hold time across -40°C to +85°C, SOIC-8 thermal performance, and compatibility with MC34164/MC33164 reset IC families.
Technical Context
The DS1233MS-3+T&R implements a temperature-compensated bandgap reference and comparator to detect VCC deviations below 2.64 V or above 2.80 V. Its internal timing circuit ensures RST remains asserted for 200–500 ms after VCC recovery, independent of external components.
It operates across 1.2 V to 5.5 V supply range with only 50 µA quiescent current and supports open-drain reset signaling with 8 mA sink capability at 0.4 V. The NC pins in SOIC-8 package provide layout flexibility without functional impact.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Point | 2.72 V typical; ensures reliable reset assertion when supply drops below 2.64 V or rises above 2.80 V |
| Reset Pulse Width | 350 ms typical; guarantees sufficient stabilization time for microprocessor power-up sequence |
| Supply Range | 1.2 V to 5.5 V; enables operation with low-voltage logic and mixed-supply systems |
| Quiescent Current | 50 µA max; minimizes standby power draw in battery-backed or energy-sensitive designs |
| Output Sink Current | 8 mA at 0.4 V; drives standard TTL/CMOS reset inputs without external buffer |
| Internal Pullup | 5 kΩ nominal; eliminates need for external pullup resistor on RST line |
| Operating Temp | -40°C to +85°C; qualified for industrial-grade embedded applications |
Pinout & Package
DS1233MS-3+T&R is supplied in an 8-pin SOIC package (150 mil width) with exposed pad not present. Pin 1 is RST (active-low open-drain reset output), Pin 2 is VCC (power supply input), Pins 3–4 and 6–8 are no-connect terminals, and Pin 5 is GND (ground reference).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low open-drain reset output; requires external pullup only if interfacing with non-TTL loads |
| 2 | VCC | Power supply input; accepts 1.2 V to 5.5 V with 50 µA operating current |
| 3, 4, 6, 7, 8 | NC | No-connect; must remain unconnected per datasheet; no internal bonding or function |
| 5 | GND | Ground reference for all internal comparators and reference circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Precision voltage monitoring | 2.72 V trip threshold with ±0.08 V tolerance ensures consistent reset behavior across temperature |
| Guaranteed reset timing | 350 ms minimum hold time after VCC recovery eliminates need for external RC timing networks |
| Integrated pullup resistor | 5 kΩ internal pullup reduces BOM count and PCB footprint versus discrete resistor solutions |
| Wide supply range support | 1.2 V to 5.5 V operation allows use with 1.8 V, 3.3 V, and 5 V microcontrollers without level-shifting |
| Industrial temperature rating | -40°C to +85°C qualification supports deployment in factory automation and outdoor electronics |
Applications
| Industrial PLC Control | Medical Diagnostic Equipment |
|---|---|
Use Scenario: Power interruption during firmware update or sensor calibration sequence. IC Role / Device Role / Timing Role: DS1233MS-3+T&R asserts RST within 10 µs of VCC drop below 2.64 V and holds it for 350 ms post-recovery to prevent corrupted register writes. Use Value: Prevents invalid state transitions in safety-critical control logic by enforcing deterministic reset timing. | Use Scenario: Battery-backed real-time clock and memory retention during AC mains failure. IC Role / Device Role / Timing Role: DS1233MS-3+T&R monitors 3.3 V system rail and triggers controlled shutdown before brownout-induced data loss. Use Value: Enables clean save-to-EEPROM sequence with guaranteed 350 ms window for firmware execution. |
| Point-of-Sale Terminal | Smart Energy Meter |
Use Scenario: Momentary voltage sag caused by printer motor activation or card swipe event. IC Role / Device Role / Timing Role: DS1233MS-3+T&R detects sub-2.64 V excursions and maintains RST until stable 3.3 V is restored and verified. Use Value: Avoids spurious reboots during peripheral operation, improving user experience and transaction reliability. | Use Scenario: Grid voltage fluctuation affecting meter's 3.3 V auxiliary supply during load switching. IC Role / Device Role / Timing Role: DS1233MS-3+T&R provides precise 2.72 V threshold detection and 350 ms reset hold to align with MCU watchdog timeout requirements. Use Value: Ensures measurement continuity by preventing premature MCU restart before analog front-end stabilization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX691ACSA+ | Higher 4.63 V trip point; includes watchdog timer and manual reset input | Requires additional timing configuration; suited for systems needing periodic health checks | Select when dual supervision (power + software) is required beyond basic reset generation |
| TPS3808G33DBVR | 3.3 V fixed trip; 200 ms min reset pulse; 1.5 µA quiescent current | Lacks internal pullup; requires external resistor; optimized for ultra-low-power battery systems | Prefer for portable devices where <2 µA standby current outweighs BOM simplification |
Compared with MAX691ACSA+ and TPS3808G33DBVR, DS1233MS-3+T&R delivers optimal balance of precision 2.72 V threshold, integrated pullup, and industrial temperature range-without added complexity or current overhead-making it ideal for cost-sensitive 3.3 V microcontroller reset applications requiring minimal external components.
Availability
DS1233MS-3+T&R is available at Aetrix Electronics and suitable for industrial PLC control, medical diagnostic equipment, point-of-sale terminals, and smart energy meters requiring stable component supply and long-term production continuity.
Supply support for DS1233MS-3+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 acquired Maxim Integrated in 2021; Maxim was a leader in precision analog, power management, and interface ICs for industrial, automotive, and communications markets.
The DS1233M family was designed specifically for microprocessor reset supervision in resource-constrained embedded systems, emphasizing accuracy, low power, and minimal external component count.
FAQ
What is the exact voltage trip point of DS1233MS-3+T&R?
The DS1233MS-3+T&R has a nominal VCC trip point of 2.72 V, with guaranteed minimum and maximum thresholds of 2.64 V and 2.80 V respectively across -40°C to +85°C. This value is factory-trimmed and specified in the DC Electrical Characteristics table under VCCTP parameter for DS1233M-3 variant. DS1233MS-3+T&R maintains this trip point without external calibration.
Does DS1233MS-3+T&R require an external pullup resistor on the RST pin?
No, DS1233MS-3+T&R includes an internal 5 kΩ pullup resistor on the RST pin, eliminating the need for an external component in standard TTL/CMOS reset interfaces. External pullup is only required if driving non-standard loads exceeding 8 mA sink capability or interfacing with high-impedance inputs outside datasheet specifications.
How long does the reset signal stay active after power recovery for DS1233MS-3+T&R?
The DS1233MS-3+T&R holds the RST signal active for a guaranteed minimum of 200 ms and typical duration of 350 ms after VCC returns to within tolerance. Maximum hold time is 500 ms. This timing is internally generated and independent of external capacitors or resistors, ensuring consistent reset behavior across operating conditions.
Is DS1233MS-3+T&R compatible with Motorola MC34164-based designs?
Yes, DS1233MS-3+T&R is pin-function compatible with MC34164, MC33164, MC34064, and MC33064. Its SOIC-8 pinout matches the functional assignment of RST, VCC, and GND, while NC pins correspond to unused terminals in those devices. No PCB redesign is needed when substituting DS1233MS-3+T&R into existing MC34164 layouts.
What is the supply voltage range supported by DS1233MS-3+T&R?
DS1233MS-3+T&R operates over a supply voltage range of 1.2 V to 5.5 V, as specified in the Recommended DC Operating Conditions table. This wide range enables direct integration with 1.8 V, 2.5 V, 3.3 V, and 5 V microcontroller systems without level translation, while maintaining full reset functionality and trip-point accuracy.
DS1233MS-3+T&R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- EconoReset
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 200ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
DS1233MS-3+T&R FAQ
1.How can I place an order for DS1233MS-3+T&R through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1233MS-3+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 DS1233MS-3+T&R reliable?
The price and inventory of DS1233MS-3+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 DS1233MS-3+T&R is usually 5 days.
3.What payment methods are accepted for DS1233MS-3+T&R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1233MS-3+T&R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1233MS-3+T&R?
DS1233MS-3+T&R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1233MS-3+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 DS1233MS-3+T&R?
For technical support, including DS1233MS-3+T&R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1233MS-3+T&R requirements.
6.How does Aetrix verify that DS1233MS-3+T&R is sourced from the original manufacturer or authorized distributors?
All DS1233MS-3+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 DS1233MS-3+T&R meets industry standards.
7.What is the process for return or replacement of DS1233MS-3+T&R?
All DS1233MS-3+T&R units undergo pre-shipment inspection (PSI). If there is an issue with DS1233MS-3+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 DS1233MS-3+T&R part is unused and in its original packaging.
Return procedure for DS1233MS-3+T&R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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