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Analog Devices Inc./Maxim Integrated MAX6307UK45D2+T
- Part No.:
- MAX6307UK45D2+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6307UK45D2+T.pdf
- Description:
- IC PROGRAM 4.500V RESET SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,632
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Product details
Overview
MAX6307UK45D2+T from Maxim Integrated is a 5-pin SOT23 programmable supervisory IC that monitors VCC (factory-set 4.5V threshold), an adjustable undervoltage input (RST IN), and an adjustable overvoltage input (OVRST IN) to assert an active-low push/pull RESET signal. It features 20ms minimum reset timeout, 8µA supply current, and guaranteed RESET validity down to VCC = 1V. It is used in multivoltage embedded systems requiring robust brownout and transient immunity.
For engineers reviewing the MAX6307UK45D2+T datasheet, MAX6307UK45D2+T pinout, MAX6307UK45D2+T application, or MAX6307UK45D2+T equivalent, this page delivers verified functional identity, factory-programmed threshold and timeout values, true pin roles, confirmed operating temperature range (0°C to +70°C), lead-free SOT23-5 packaging, and validated alternative options for dual-supply monitoring designs.
Technical Context
The MAX6307UK45D2+T implements a triple-input supervision architecture: internal factory-trimmed voltage divider sets VCC reset threshold at 4.5V ±2.5%, while external resistor dividers program RST IN (undervoltage) and OVRST IN (overvoltage) thresholds referenced to a 1.23V internal bandgap. Its push/pull RESET output drives logic-level loads without external pull-up.
It uses a precision RC-based timeout generator with ±20% tolerance over temperature, immune to fast transients via built-in filtering on all inputs. The device asserts RESET whenever any monitored voltage violates its threshold - including VCC falling below 4.5V, RST IN falling below its programmed level, or OVRST IN rising above its programmed level - and holds RESET active for ≥20ms after all conditions are restored.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 4.5V ±2.5% (factory-trimmed; enables precise 5V rail monitoring with margin) |
| Reset Timeout Period | 20ms minimum (D2 variant; ensures µP reset pulse meets minimum assertion time) |
| Supply Current | 8µA typical at +25°C (enables battery-powered operation with negligible quiescent drain) |
| Operating Temperature | 0°C to +70°C (commercial-grade rating; suitable for PC, industrial HMI, and portable equipment) |
| RESET Output Type | Active-low push/pull (sinks and sources current; eliminates need for external pull-up resistor) |
| Input Voltage Range | VCC = (VTH + 2.5%) to +5.5V = 4.61V to +5.5V (defines valid supply range for reliable supervision) |
| RESET Validity | Guaranteed to VCC = 1V (ensures deterministic reset behavior during deep brownout) |
Pinout & Package
MAX6307UK45D2+T is housed in a RoHS-compliant, lead-free 5-pin SOT23 package (package code U5+1, outline 21-0057), optimized for space-constrained PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push/pull reset output | Drives CMOS/TTL loads directly; sinks 3.2mA @ VCC > 4.25V; no external pull-up required |
| 2 - GND | System ground reference | Common return path for all internal comparators and output stage; must be low-impedance |
| 3 - RST IN | Adjustable undervoltage reset input | Compares external divided voltage to 1.23V reference; asserts RESET if input falls below threshold |
| 4 - OVRST IN | Adjustable overvoltage reset input | Compares external divided voltage to 1.23V reference; asserts RESET if input rises above threshold |
| 5 - VCC | Primary supply and monitored rail | Power source and input to internal trimmed divider; monitored at factory-set 4.5V threshold |
Key Features
| Feature | Design Value |
|---|---|
| Triple independent monitoring | Simultaneously supervises VCC (4.5V), RST IN (user-defined undervoltage), and OVRST IN (user-defined overvoltage) |
| Factory-programmed timing | 20ms min reset timeout (D2) eliminates external timing components and layout variability |
| Transient immunity | Immune to VCC transients ≤100ns at 4.5V overdrive; prevents false resets in noisy power environments |
| No external components | Operates fully standalone - no capacitors, resistors, or pull-ups needed for basic supervision function |
| Low-voltage reset guarantee | RESET remains valid down to VCC = 1V, enabling reliable operation during severe brownout conditions |
Applications
| Industrial PLC I/O Modules | Medical Portable Monitors |
|---|---|
Use Scenario: Power rails (5V logic, 3.3V MCU, 12V analog) experience intermittent dips during relay switching or motor startup. IC Role / Device Role / Timing Role: MAX6307UK45D2+T monitors 5V VCC and two auxiliary rails via RST IN/OVRST IN to trigger system-wide reset before firmware corruption occurs. Use Value: Prevents spurious reboots by ignoring <100ns transients while asserting ≥20ms RESET to ensure full µP initialization. |
Use Scenario: Battery-powered ECG monitor operates across wide temperature range with aging Li-ion cells dropping from 4.2V to 3.0V. IC Role / Device Role / Timing Role: MAX6307UK45D2+T supervises main 3.3V rail (via RST IN divider) and backup 5V rail (via VCC pin), holding RESET until both stabilize post-power-on. Use Value: 8µA quiescent current extends battery life; 0°C to +70°C rating covers clinical ambient conditions. |
| Automotive Infotainment Head Units | Network Edge Routers |
Use Scenario: 12V vehicle supply experiences load-dump spikes and cold-crank dips; 5V/3.3V DC-DC outputs must remain regulated. IC Role / Device Role / Timing Role: MAX6307UK45D2+T uses OVRST IN to detect >5.5V on 5V rail and RST IN to detect <4.75V, triggering hardware reset before ASIC lockup. Use Value: Dual-threshold detection on single IC replaces discrete comparator solutions, reducing BOM count and board area. |
Use Scenario: Dual-power router (5V primary, 3.3V FPGA) requires coordinated reset sequencing during hot-swap power module insertion. IC Role / Device Role / Timing Role: MAX6307UK45D2+T monitors 5V VCC and 3.3V rail (via RST IN) to generate synchronized RESET pulse only after both rails are stable for ≥20ms. Use Value: Push/pull RESET output drives multiple downstream reset inputs without fanout limitations or timing skew. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-input supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6307UK45D3+T | Same 4.5V VCC threshold and pinout, but 140ms min reset timeout (D3 vs D2) | Used where longer reset hold time is required for complex boot sequences or slow-ramping supplies | Select when system boot firmware requires >20ms of guaranteed reset assertion |
| TPS3808G33DBVR | Single-input (VDD only), 3.3V fixed threshold, 200ms timeout, open-drain output | Lacks RST IN/OVRST IN capability; requires external circuitry for multi-rail or overvoltage monitoring | Choose only for simple 3.3V-only supervision where dual/threshold flexibility is unnecessary |
Compared with MAX6307UK45D2+T, the D3 variant trades shorter timeout for greater timing margin, while TPS3808G33DBVR reduces integration at the cost of losing overvoltage detection and auxiliary rail monitoring - making MAX6307UK45D2+T uniquely suited for compact multivoltage systems needing coordinated, transient-immune reset control.
Availability
MAX6307UK45D2+T is available at Aetrix Electronics and suitable for industrial PLC I/O modules, medical portable monitors, and automotive infotainment head units requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6307UK45D2+T 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 power, sensing, interface, and reliability-critical applications.
MAX6307UK45D2+T belongs to the MAX6305–MAX6313 family of programmable supervisory circuits, engineered specifically for multivoltage systems requiring simultaneous VCC, undervoltage, and overvoltage monitoring in minimal footprint.
FAQ
What is the exact factory-programmed reset threshold for MAX6307UK45D2+T?
The MAX6307UK45D2+T has a factory-trimmed VCC reset threshold of 4.5V, specified with ±2.5% tolerance over the 0°C to +70°C temperature range. This value is permanently set during manufacturing and corresponds to the "45" in the part number per Table 1 of the datasheet. The threshold is implemented using an internal precision voltage divider and does not require external calibration.
Does MAX6307UK45D2+T support overvoltage detection on a secondary rail?
Yes, MAX6307UK45D2+T supports overvoltage detection via its OVRST IN pin (Pin 4). When an external resistor divider applies a voltage exceeding the internal 1.23V reference, the device asserts RESET. This allows monitoring of any positive rail - such as a 12V analog supply or 5V DC-DC output - for overvoltage faults independently of the 4.5V VCC threshold.
What is the minimum VCC voltage at which MAX6307UK45D2+T guarantees valid RESET output?
MAX6307UK45D2+T guarantees valid RESET output down to VCC = 1V. Below this level, the push/pull driver's sink/source capability degrades, but within the specified 4.61V to 5.5V operating range (VTH + 2.5% to +5.5V), RESET remains fully functional with VOL ≤ 0.4V at 3.2mA sink current and VOH ≥ 0.8 × VCC when sourcing.
Can MAX6307UK45D2+T replace a basic single-rail supervisor like the MAX809?
No - MAX6307UK45D2+T is not a drop-in replacement for MAX809. While both are reset supervisors, MAX809 monitors only one rail at a fixed threshold (e.g., 3.08V) with open-drain output and no auxiliary inputs. MAX6307UK45D2+T provides triple-input supervision (VCC + RST IN + OVRST IN), push/pull output, and programmable timeout - requiring different schematic integration and offering significantly higher functionality.
Is the 20ms reset timeout of MAX6307UK45D2+T adjustable externally?
No, the 20ms minimum reset timeout (D2 variant) is factory-programmed and non-adjustable. It is generated by an internal RC timer with ±20% tolerance over temperature and supply voltage. To change timeout duration, a different part number must be selected - e.g., MAX6307UK45D1+T (1ms), MAX6307UK45D3+T (140ms), or MAX6307UK45D4+T (1120ms).
MAX6307UK45D2+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 4.5V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 20ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6307UK45D2+T FAQ
1.How can I place an order for MAX6307UK45D2+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6307UK45D2+T 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 MAX6307UK45D2+T reliable?
The price and inventory of MAX6307UK45D2+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6307UK45D2+T is usually 5 days.
3.What payment methods are accepted for MAX6307UK45D2+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6307UK45D2+T transactions.
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4.How is shipping managed for MAX6307UK45D2+T?
MAX6307UK45D2+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6307UK45D2+T 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 MAX6307UK45D2+T?
For technical support, including MAX6307UK45D2+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6307UK45D2+T requirements.
6.How does Aetrix verify that MAX6307UK45D2+T is sourced from the original manufacturer or authorized distributors?
All MAX6307UK45D2+T 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 MAX6307UK45D2+T meets industry standards.
7.What is the process for return or replacement of MAX6307UK45D2+T?
All MAX6307UK45D2+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6307UK45D2+T, 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 MAX6307UK45D2+T part is unused and in its original packaging.
Return procedure for MAX6307UK45D2+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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