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Analog Devices Inc./Maxim Integrated DS1233D-5+T&R
- Part No.:
- DS1233D-5+T&R
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
DS1233D-5+T&R.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:7,763
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Product details
Overview
DS1233D-5+T&R from Maxim Integrated (now Analog Devices) is a 5V microprocessor supervisory circuit with precision voltage monitoring, 350 ms reset pulse width, and ±5% VCC trip point (4.5–4.75 V). It provides power-fail detection and reset assertion during brownout or startup, used in embedded controllers requiring reliable power-on reset sequencing.
For engineers reviewing the DS1233D-5+T&R datasheet, DS1233D-5+T&R pinout, DS1233D-5+T&R application, or DS1233D-5+T&R equivalent, key selection criteria include guaranteed 350 ms reset timeout, internal 5 kΩ pull-up resistor, SOT-223 package compatibility, -40°C to +85°C operation, and 5V supply monitoring tolerance.
Technical Context
The DS1233D-5+T&R implements a precision temperature-compensated voltage reference and comparator to monitor VCC against a fixed 5% threshold. It asserts an active-low RESET signal when VCC drops below 4.5 V and holds it active for 250–450 ms after VCC returns to tolerance.
Its internal architecture includes a dedicated power-fail detector, no external capacitor required for timing, and direct compatibility with Motorola 68XXX and HC16 microprocessors. The device operates without external biasing components beyond optional pushbutton support.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Trip Point | 4.5 V (min), 4.625 V (typ), 4.75 V (max) - ensures reset activation before 5V rail falls outside ±5% spec |
| Reset Pulse Width | 250–450 ms - guarantees sufficient stabilization time for microprocessor clock and memory initialization |
| Supply Voltage Range | 1.2 V to 5.5 V - supports operation across wide input range while monitoring only 5V rail |
| Operating Temperature | -40°C to +85°C - qualified for industrial-grade embedded systems without derating |
| Internal Pull-Up Resistor | 3.75–6.25 kΩ - eliminates need for external pull-up on RESET output in most MCU interfaces |
| Output Low Voltage | ≤0.4 V at 8 mA - ensures solid logic-low assertion compatible with TTL and CMOS inputs |
| Quiescent Current | 50 µA - enables low-power system monitoring without significant standby drain |
Pinout & Package
SOT-223 surface-mount package with 4-pin configuration (pin 4 = GND); TO-92 variant uses 3-pin layout (no pin 4). Pinout optimized for minimal board space and direct integration into 5V microcontroller reset networks.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PIN 1 | GROUND | Reference return path for internal comparator and voltage reference; must be low-impedance connection to system ground plane |
| PIN 2 | RESET (active-low) | Open-drain output asserted low during power fault or startup; requires external pull-up if not using internal 5 kΩ resistor |
| PIN 3 | VCC | Primary power input and monitored rail; connects directly to 5V supply being supervised |
| PIN 4 (SOT-223 only) | GROUND | Second ground terminal for thermal and noise performance; electrically tied to PIN 1 internally |
Key Features
| Feature | Design Value |
|---|---|
| Precision 5% VCC threshold | Enables compliance with 5V ±5% supply specification without calibration or trimming |
| Guaranteed 350 ms reset timeout | Meets minimum reset hold time requirements of Intel 80Cxx, Motorola 68xxx, and ARM Cortex-M0/M3 boot sequences |
| Internal 5 kΩ pull-up resistor | Reduces BOM count by eliminating discrete pull-up; supports direct interface to most microcontroller reset inputs |
| Temperature-compensated reference | Maintains trip point accuracy across full -40°C to +85°C range without external compensation |
| No external timing capacitor required | Eliminates capacitor aging, tolerance, and PCB footprint concerns associated with RC-based reset generators |
Applications
| Industrial PLC Controller | Medical Diagnostic Device |
|---|---|
Use Scenario: Power interruption during firmware update or sensor data acquisition. IC Role / Device Role / Timing Role: Supervisory reset generator asserting active-low signal to halt CPU execution until 5V rail stabilizes post-recovery. Use Value: Prevents corrupted flash writes and inconsistent state transitions by enforcing 350 ms minimum reset hold time after VCC recovery. | Use Scenario: Battery-backed 5V subsystem powering ADC and display controller in portable ultrasound unit. IC Role / Device Role / Timing Role: Monitors main 5V rail derived from DC-DC converter; triggers controlled shutdown sequence upon undervoltage. Use Value: Ensures deterministic restart behavior under marginal input conditions, meeting IEC 62304 safety-critical boot requirements. |
| Automotive Body Control Module | Point-of-Sale Terminal |
Use Scenario: Load-dump transients causing temporary 5V rail sag during alternator regulation events. IC Role / Device Role / Timing Role: Voltage supervisor detecting sub-4.5 V condition and holding microcontroller in reset until rail recovers and remains stable. Use Value: Avoids spurious CAN message transmission or EEPROM corruption during transient brownout events. | Use Scenario: Uninterruptible power supply switchover causing brief 5V dip during AC-to-battery transition. IC Role / Device Role / Timing Role: Reset controller ensuring processor remains held until post-switchover 5V rail settles within ±5% for ≥350 ms. Use Value: Guarantees clean boot sequence and prevents transaction loss during power source handover. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326–T5 | Fixed 4.63 V trip point (±1.5%), 200 ms reset timeout, SOT-23-3 package | Lacks internal pull-up; requires external resistor; shorter timeout may not meet all MCU boot requirements | Select when tighter trip accuracy and smaller footprint are prioritized over guaranteed 350 ms hold time |
| TPS3808G33DBVR | 3.3 V trip point, adjustable delay (1.25 ms to 10 s), 6-pin SOT-23 package | Designed for 3.3 V systems; programmable delay requires external capacitor; incompatible with 5V-only monitoring | Choose only for 3.3 V applications requiring configurable reset timing; not a functional substitute for DS1233D-5+T&R |
Compared with MAX6326–T5 and TPS3808G33DBVR, the DS1233D-5+T&R uniquely delivers factory-trimmed 5% 5V monitoring with integrated pull-up and fixed 350 ms timeout in SOT-223 - making it optimal for cost-sensitive, industrial 5V microcontroller reset applications where simplicity and proven timing behavior are critical.
Availability
DS1233D-5+T&R is available at Aetrix Electronics and suitable for industrial control systems, medical instrumentation, automotive body electronics, and point-of-sale terminals requiring stable component supply and long-term manufacturability.
Supply support for DS1233D-5+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
Maxim Integrated, now part of Analog Devices, designs high-performance analog and mixed-signal ICs for industrial, automotive, communications, and computing markets.
The DS1233D-5+T&R belongs to the EconoReset™ family of supervisory circuits, engineered specifically for reliable, low-cost power-on reset and brownout protection in 5V microprocessor systems.
FAQ
What is the exact VCC trip point tolerance for DS1233D-5+T&R?
The DS1233D-5+T&R has a guaranteed VCC trip point of 4.5 V (minimum), 4.625 V (typical), and 4.75 V (maximum), corresponding to ±5% tolerance around 4.625 V nominal. This specification is tested and ensured across the full -40°C to +85°C operating temperature range and is based on internal temperature-compensated voltage reference design.
Does DS1233D-5+T&R require an external pull-up resistor on the RESET pin?
No, the DS1233D-5+T&R includes an internal pull-up resistor of 3.75–6.25 kΩ on the RESET output, eliminating the need for an external component in most standard microcontroller interfaces. External pull-up is only required if higher drive strength or different voltage level translation is needed beyond the internal resistor's capability.
What is the reset timeout duration of DS1233D-5+T&R and how is it implemented?
The DS1233D-5+T&R provides a fixed reset timeout of 250–450 ms (typical 350 ms) after VCC returns to tolerance. This timing is generated internally using a precision RC network and requires no external capacitor. The duration is factory-trimmed and stable across temperature and supply variations.
Can DS1233D-5+T&R be used with 3.3V microcontrollers?
The DS1233D-5+T&R monitors only the 5V supply rail and asserts RESET based on 5V threshold violation. Its RESET output is open-drain and compatible with 3.3V logic inputs when pulled to 3.3V externally - but it does not monitor or regulate 3.3V rails. For 3.3V supervision, use DS1233A-5 or similar 3.3V-specific variants.
Is DS1233D-5+T&R pin-compatible with the DS1233-5 variant?
No - DS1233D-5+T&R uses a 4-pin SOT-223 package (with dual ground pins), whereas DS1233-5 is a 3-pin TO-92 device. Though functionally identical in supervision behavior, their mechanical footprints and thermal characteristics differ significantly; PCB layout changes are required for substitution.
DS1233D-5+T&R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- EconoReset
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.625V
- 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
DS1233D-5+T&R FAQ
1.How can I place an order for DS1233D-5+T&R through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1233D-5+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 DS1233D-5+T&R reliable?
The price and inventory of DS1233D-5+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 DS1233D-5+T&R is usually 5 days.
3.What payment methods are accepted for DS1233D-5+T&R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1233D-5+T&R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1233D-5+T&R?
DS1233D-5+T&R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1233D-5+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 DS1233D-5+T&R?
For technical support, including DS1233D-5+T&R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1233D-5+T&R requirements.
6.How does Aetrix verify that DS1233D-5+T&R is sourced from the original manufacturer or authorized distributors?
All DS1233D-5+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 DS1233D-5+T&R meets industry standards.
7.What is the process for return or replacement of DS1233D-5+T&R?
All DS1233D-5+T&R units undergo pre-shipment inspection (PSI). If there is an issue with DS1233D-5+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 DS1233D-5+T&R part is unused and in its original packaging.
Return procedure for DS1233D-5+T&R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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