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Analog Devices Inc./Maxim Integrated MAX6312UK43D3
- Part No.:
- MAX6312UK43D3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6312UK43D3.pdf
- Description:
- IC SUPERVISOR PROGRAMMABLE RESET
- Quantity:
- Payment:
- Shipping:
Inventory:1,710
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Product details
Overview
MAX6312UK43D3 from Maxim Integrated is a 5-pin SOT23 programmable supervisory circuit that monitors VCC and an external undervoltage input (RST IN) while providing manual reset capability. It features a factory-set 4.3V ±2.5% VCC reset threshold, 140ms (min) reset timeout, active-high push/pull RESET output, and operates down to VCC = 1.0V. It is used in multivoltage embedded systems requiring reliable power-on and brownout reset assertion.
For engineers reviewing the MAX6312UK43D3 datasheet, MAX6312UK43D3 pinout, MAX6312UK43D3 application, or MAX6312UK43D3 equivalent, key selection criteria include its 4.3V VCC threshold tolerance, 140ms timeout stability over temperature, MR input compatibility with TTL/CMOS logic, guaranteed RESET validity to 1V, and immunity to sub-µs VCC transients.
Technical Context
The MAX6312UK43D3 implements a factory-trimmed internal voltage divider to monitor VCC against a precise 4.3V threshold, with ±2.5% accuracy over –40°C to +85°C. It integrates a dedicated RST IN comparator referenced to 1.23V and a manual-reset input with 63.5kΩ internal pull-up.
Its active-high push/pull RESET output sources ≥0.8×VCC at 150µA and sinks ≤0.3V at 1.2mA, ensuring robust interface with microcontrollers. The 140ms minimum timeout is factory-programmed and exhibits <±1% variation across temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 4.3V ±2.5% (–40°C to +85°C); ensures reliable detection of 4.3V supply droop before system instability |
| Reset Timeout Period | 140ms (min); guarantees sufficient hold time for µP initialization after power stabilization |
| Supply Current | 8µA (typ) at +25°C; enables battery longevity in portable equipment |
| RESET Output Type | Active-high push/pull; eliminates need for external pull-up and supports direct µP reset pin drive |
| MR Input Logic | VIL ≤0.3×VCC, VIH ≥0.7×VCC; compatible with 3V/5V logic without level-shifting |
| Operating VCC Range | 1.0V to 5.5V; allows valid RESET assertion during deep brownout down to 1V |
| Transient Immunity | Immune to VCC glitches <1µs at 4.3V threshold overdrive; prevents false resets in noisy environments |
Pinout & Package
MAX6312UK43D3 is housed in a 5-pin SOT23 package (outline U5+1), with 0.95mm pitch, 2.9mm × 1.6mm footprint, and 1.1mm max height - suitable for space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: RESET | Active-high reset output | Push/pull driver asserts high during reset; sinks ≤0.3V at 1.2mA, sources ≥0.8×VCC at 150µA |
| 2: GND | System ground reference | Return path for all internal comparators and output stage; must be low-impedance for noise immunity |
| 3: RST IN | Adjustable undervoltage reset input | Comparator referenced to 1.23V; asserts reset when external monitored voltage falls below programmed threshold |
| 4: MR | Manual reset input | Active-low input with 63.5kΩ internal pull-up; forces reset when pulled ≤0.3×VCC; debounced internally |
| 5: VCC | Main supply input | Power source and primary monitored rail; internal trimmed divider sets 4.3V reset point |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set 4.3V VCC threshold | Eliminates external resistor network; reduces BOM count and layout area vs. adjustable supervisors |
| 140ms factory-programmed timeout | Guarantees consistent reset hold time without timing capacitor drift or temperature sensitivity |
| Active-high push/pull RESET | Directly drives µP reset pins without pull-up resistors; improves noise margin and simplifies routing |
| RST IN + MR dual reset initiation | Supports both automatic (supply/fault) and operator-initiated reset in same device; no secondary IC needed |
| 1V VCC operation guarantee | Ensures deterministic reset behavior during severe brownout-critical for fail-safe embedded control |
Applications
| Industrial PLC I/O Module | Medical Patient Monitor |
|---|---|
Use Scenario: Power sequencing and fault recovery in distributed I/O modules with 5V/3.3V rails. IC Role / Device Role / Timing Role: Monitors main 5V supply and auxiliary 3.3V logic rail via RST IN; asserts active-high RESET on any undervoltage event. Use Value: Prevents firmware corruption during field-induced supply dips; 140ms timeout ensures FPGA configuration completes before release. |
Use Scenario: Battery-backed vital-sign acquisition subsystem requiring fail-safe restart after power interruption. IC Role / Device Role / Timing Role: Supervises 3.3V system rail and triggers reset on battery sag; MR pin enables clinician-initiated soft reboot. Use Value: Maintains RESET validity down to 1V VCC, enabling controlled shutdown before data loss; 8µA quiescent current extends backup runtime. |
| Automotive Body Control Unit | Point-of-Sale Terminal |
Use Scenario: Cold-cranking resilience in 12V-derived 5V/3.3V domains exposed to engine cranking transients. IC Role / Device Role / Timing Role: Detects 5V rail collapse during cranking; ignores sub-µs dips via inherent transient immunity. Use Value: Avoids spurious resets during engine start; 4.3V threshold aligns with automotive 5V regulator dropout spec. |
Use Scenario: Secure boot integrity in payment terminals with tamper-detection circuits and EEPROM logging. IC Role / Device Role / Timing Role: Provides power-on reset and MR-triggered secure wipe/reset; RESET holds until crypto module initializes. Use Value: Guarantees deterministic reset state before security firmware loads; push/pull output prevents latch-up on shared reset bus. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6312UK43D2 | 20ms (min) reset timeout vs. 140ms (min) for MAX6312UK43D3 | Suitable for fast-boot µPs where shorter reset hold is acceptable | Select D2 only if system initialization completes within 20ms; D3 required for typical ARM Cortex-M boot sequences |
| TPS3808G33DBVR | 3.3V fixed VCC threshold, 200ms timeout, open-drain output, no RST IN or MR | Lacks dual-input monitoring and manual reset; requires external pull-up | Use only when single-rail supervision suffices and board space permits pull-up resistor; not drop-in for MAX6312UK43D3 |
Compared with MAX6312UK43D2 and TPS3808G33DBVR, MAX6312UK43D3 uniquely combines 4.3V precision threshold, 140ms timeout, active-high push/pull output, and dual-initiation (RST IN + MR) in SOT23-enabling compact, robust reset architecture for multivoltage industrial controllers.
Availability
MAX6312UK43D3 is available at Aetrix Electronics and suitable for industrial PLCs, medical monitors, automotive body controllers, point-of-sale terminals, and battery-powered instrumentation requiring stable component supply across extended temperature ranges.
Supply support for MAX6312UK43D3 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 and mixed-signal ICs for demanding industrial, medical, and automotive applications, with emphasis on reliability and integration.
The MAX6305–MAX6313 family delivers programmable supervisory functions in minimal SOT23 packages, targeting space- and power-constrained embedded systems needing multirail monitoring and deterministic reset behavior.
FAQ
What is the exact factory-set VCC reset threshold for MAX6312UK43D3?
The MAX6312UK43D3 has a factory-trimmed VCC reset threshold of 4.3V with ±2.5% tolerance over the full –40°C to +85°C operating range. This value is laser-trimmed during production and documented in Table 1 of the datasheet; it corresponds to nominal code "43" in the part number suffix and is verified per unit during test.
Does MAX6312UK43D3 support manual reset functionality?
Yes, MAX6312UK43D3 includes a dedicated MR (manual reset) input on pin 4. A logic-low pulse ≥1.5µs asserts RESET for the full 140ms timeout period. The pin features a 63.5kΩ internal pull-up resistor, allowing direct connection to a momentary switch to ground without external components.
What is the guaranteed operating VCC range for MAX6312UK43D3?
MAX6312UK43D3 operates from VCC = 1.0V to 5.5V. Crucially, its RESET output remains valid (logic-high during reset) down to VCC = 1.0V, ensuring fail-safe behavior during deep brownout conditions where many competing supervisors cease functioning.
How does the RST IN input function in MAX6312UK43D3?
In MAX6312UK43D3, pin 3 (RST IN) is an adjustable undervoltage comparator input referenced to 1.23V. When an external voltage divider applies a voltage <1.23V to this pin, the device asserts RESET. It supports monitoring of secondary rails (e.g., 3.3V, 2.5V) independent of the 4.3V VCC threshold.
Is MAX6312UK43D3 pin-compatible with other devices in the MAX6305–MAX6313 family?
Yes, MAX6312UK43D3 uses the identical SOT23-5 pinout as all MAX6305–MAX6313 variants. Pin 1 is RESET, pin 2 is GND, pin 3 is RST IN, pin 4 is MR, and pin 5 is VCC - enabling direct substitution within the same temperature grade (e.g., MAX6312EUK43D3 for extended temp).
MAX6312UK43D3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 4.3V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6312UK43D3 FAQ
1.How can I place an order for MAX6312UK43D3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6312UK43D3 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 MAX6312UK43D3 reliable?
The price and inventory of MAX6312UK43D3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6312UK43D3 is usually 5 days.
3.What payment methods are accepted for MAX6312UK43D3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6312UK43D3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6312UK43D3?
MAX6312UK43D3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6312UK43D3 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 MAX6312UK43D3?
For technical support, including MAX6312UK43D3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6312UK43D3 requirements.
6.How does Aetrix verify that MAX6312UK43D3 is sourced from the original manufacturer or authorized distributors?
All MAX6312UK43D3 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 MAX6312UK43D3 meets industry standards.
7.What is the process for return or replacement of MAX6312UK43D3?
All MAX6312UK43D3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6312UK43D3, 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 MAX6312UK43D3 part is unused and in its original packaging.
Return procedure for MAX6312UK43D3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6312UK43D3 Tags
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