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Analog Devices Inc./Maxim Integrated DS1233M-5+
- Part No.:
- DS1233M-5+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
DS1233M-5+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,173
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Product details
Overview
DS1233M-5+ from Maxim Integrated (now part of Analog Devices) is a precision voltage-monitoring microprocessor supervisory circuit in TO-92 or 8-pin SOIC package, providing active-low reset assertion at 4.375 V typical trip point, 350 ms reset timeout, and -40°C to +85°C operation - used for reliable power-on reset and brownout protection in embedded microcontroller systems.
For engineers reviewing the DS1233M-5+ datasheet, DS1233M-5+ pinout, DS1233M-5+ application, or DS1233M-5+ equivalent, key selection criteria include its fixed 4.375 V trip threshold, guaranteed 350 ms reset hold time, internal 5 kΩ pullup, compatibility with Motorola 68XXX/HC16 families, and pin-function equivalence to MC33064/MC34064 series.
Technical Context
The DS1233M-5+ integrates a temperature-compensated bandgap reference and comparator to detect VCC deviations beyond ±5% of nominal 5 V supply. It asserts RST low on both power-up and brownout events, holding reset for 350 ms after VCC returns within tolerance.
Its internal 5 kΩ pullup resistor eliminates external components for open-drain reset signaling, and its pinout matches legacy Motorola supervisory ICs - enabling drop-in replacement without layout changes in existing 68XXX-based designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Point | 4.25 V (min) to 4.49 V (max); ensures reset activation before 5 V rail drops below 4.375 V typical, protecting against marginal supply operation |
| Reset Active Time | 200–500 ms; guarantees ≥350 ms minimum hold time for full microprocessor stabilization after power recovery |
| Operating Temp | -40°C to +85°C; supports industrial-grade deployment without derating or thermal management |
| Supply Voltage Range | 1.2 V to 5.5 V; allows use across 3.3 V and 5 V systems with same device variant |
| Output Drive | 8 mA sink capability at 0.4 V; sufficient to drive standard CMOS/TTL reset inputs without external buffer |
| Internal Pullup | 3.75–6.5 kΩ; enables direct connection to microprocessor reset pin without external resistor |
Pinout & Package
DS1233M-5+ is available in TO-92 (3-pin) and 8-pin SOIC packages. The TO-92 version uses pins 1 (RST), 2 (VCC), and 3 (GND). The SOIC version maps RST, VCC, GND to pins 1, 2, and 4 respectively, with pins 3 and 5–8 as no-connect.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RST (Pin 1, TO-92 / Pin 1, SOIC) | Active-low open-drain reset output | Drives microprocessor reset input low during fault; requires external pullup only if internal 5 kΩ insufficient for target load |
| VCC (Pin 2, TO-92 / Pin 2, SOIC) | Power supply input | Monitored rail input; powers internal reference and comparator; operates down to 1.2 V but trip function valid only ≥2.7 V |
| GND (Pin 3, TO-92 / Pin 4, SOIC) | Ground reference | Common return for VCC and RST; must be low-impedance path to avoid false resets from ground bounce |
Key Features
| Feature | Design Value |
|---|---|
| Precision voltage monitoring | ±1.5% trip accuracy over temperature ensures consistent reset activation across -40°C to +85°C without calibration |
| Guaranteed 350 ms reset timeout | Eliminates need for external RC timing network, reducing BOM count and board space in compact designs |
| Motorola pin-compatible interface | Direct replacement for MC33064/MC34064 in legacy 68XXX systems without PCB revision or firmware change |
| Integrated 5 kΩ pullup resistor | Supports immediate connection to most microprocessor reset inputs, removing one discrete component per channel |
Applications
| Industrial PLC Controller | Point-of-Sale Terminal |
|---|---|
Use Scenario: Power cycling due to unstable AC-DC adapter or battery backup switchover in factory-floor controllers. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low reset to ARM Cortex-M4 MCU until 5 V rail stabilizes post-recovery. Use Value: Prevents corrupted register writes or flash programming during undervoltage by enforcing ≥350 ms reset hold after VCC returns to 4.375 V. | Use Scenario: Frequent hot-plug events and short-duration line sags in retail payment terminals powered from USB-C PD adapters. IC Role / Device Role / Timing Role: Voltage monitor triggering controlled reset of STM32F4 microcontroller upon 5 V rail dip below 4.25 V. Use Value: Avoids transaction loss or EEPROM corruption by ensuring MCU remains held in reset until power fully recovers and clocks stabilize. |
| Medical Diagnostic Handheld | Smart Energy Meter |
Use Scenario: Battery-to-DC/DC converter transitions causing transient dips during mode switching in portable ultrasound devices. IC Role / Device Role / Timing Role: Brownout detector holding reset on ADuCM360 precision analog microcontroller until regulated 3.3 V rail reaches tolerance. Use Value: Guarantees ADC reference stability and sensor signal integrity by preventing wake-up during sub-threshold supply conditions. | Use Scenario: Grid voltage fluctuations and lightning-induced surges affecting auxiliary 5 V supply in DIN-rail mounted meters. IC Role / Device Role / Timing Role: Primary reset supervisor for MSP430FR5994 metrology MCU, asserting RST on sustained <4.25 V condition. Use Value: Maintains secure boot sequence and tamper-evident logging integrity by blocking execution until supply meets accuracy and timing requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage-monitoring reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326–T43D+ | Fixed 4.3 V trip, 200 ms min reset timeout, SOT23-3 package, no internal pullup | Requires external 10 kΩ pullup; suited for space-constrained designs where 350 ms hold time is not mandatory | Select when board area is critical and reset timing margin can be reduced to 200 ms |
| TPS3808G33DBVR | Adjustable trip via external resistor divider; 200–1200 ms programmable reset delay; 5.5 V max VCC | Needs external components for trip setting and timing; supports flexible rail monitoring beyond fixed 5 V | Select when multi-rail supervision or configurable thresholds are required across product variants |
Compared with MAX6326–T43D+ and TPS3808G33DBVR, the DS1233M-5+ delivers guaranteed 350 ms reset hold and integrated pullup in legacy-compatible TO-92/SOIC footprints - simplifying qualification and reducing validation effort in cost-sensitive industrial control upgrades.
Availability
DS1233M-5+ is available at Aetrix Electronics and suitable for industrial PLC controllers, point-of-sale terminals, medical handheld diagnostics, and smart energy meters requiring stable component supply with long-term lifecycle support.
Supply support for DS1233M-5+ 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 high-performance analog and mixed-signal ICs for industrial, automotive, and communications applications.
The DS1233M-5+ belongs to the EconoReset™ family - engineered for cost-effective, pin-compatible replacement of legacy supervisory circuits in microprocessor-based systems requiring robust power-fail detection and reset timing.
FAQ
What is the exact voltage trip point of DS1233M-5+?
The DS1233M-5+ has a guaranteed VCC trip point between 4.25 V (minimum) and 4.49 V (maximum), with 4.375 V typical. This threshold is factory-trimmed and temperature-compensated to ensure consistent brownout detection across -40°C to +85°C. The DS1233M-5+ does not support adjustable trip points - it is a fixed 5 V supervisor variant.
Does DS1233M-5+ require an external pullup resistor on the RST pin?
No, DS1233M-5+ includes an internal 5 kΩ pullup resistor on the RST pin, eliminating the need for an external component in most standard microprocessor reset interfaces. However, if the target MCU reset input has unusually high leakage or capacitive loading, an external pullup may still be recommended - verify using the DS1233M-5+ IOL specification of 8 mA at 0.4 V.
Is DS1233M-5+ pin-compatible with MC34064?
Yes, DS1233M-5+ is explicitly pin-function compatible with MC34064 in both TO-92 and SOIC packages, as confirmed in the official datasheet. Its RST, VCC, and GND pin assignments match, and its electrical behavior (trip point, reset timeout, output drive) meets or exceeds MC34064 specifications - making DS1233M-5+ a validated drop-in upgrade.
What is the minimum operating voltage for DS1233M-5+ to function correctly?
The DS1233M-5+ specifies a supply voltage range of 1.2 V to 5.5 V, but its voltage-monitoring function is only guaranteed above 2.7 V. Below that, the internal reference and comparator may not operate reliably. For correct trip-point detection and 350 ms reset timing, DS1233M-5+ must be used with VCC ≥2.7 V - though it remains powered and functional down to 1.2 V.
Can DS1233M-5+ be used with 3.3 V microcontrollers?
Yes, DS1233M-5+ supports 3.3 V systems: its VCC pin accepts 1.2–5.5 V, and its RST output is open-drain with 8 mA sink capability - compatible with 3.3 V logic levels. However, its 4.375 V trip point is intended for 5 V rails; for 3.3 V supervision, consider DS1233M-3+ (2.72 V typical trip) instead of DS1233M-5+.
DS1233M-5+ 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:
- 4.375V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 200ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
DS1233M-5+ FAQ
1.How can I place an order for DS1233M-5+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1233M-5+ 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 DS1233M-5+ reliable?
The price and inventory of DS1233M-5+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1233M-5+ is usually 5 days.
3.What payment methods are accepted for DS1233M-5+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1233M-5+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1233M-5+?
DS1233M-5+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1233M-5+ 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 DS1233M-5+?
For technical support, including DS1233M-5+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1233M-5+ requirements.
6.How does Aetrix verify that DS1233M-5+ is sourced from the original manufacturer or authorized distributors?
All DS1233M-5+ 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 DS1233M-5+ meets industry standards.
7.What is the process for return or replacement of DS1233M-5+?
All DS1233M-5+ units undergo pre-shipment inspection (PSI). If there is an issue with DS1233M-5+, 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 DS1233M-5+ part is unused and in its original packaging.
Return procedure for DS1233M-5+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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