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Analog Devices Inc./Maxim Integrated MAX6307UK35D3
- Part No.:
- MAX6307UK35D3
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6307UK35D3.pdf
- Description:
- IC SUPERVISOR PROGRAMMABLE RESET
- Quantity:
- Payment:
- Shipping:
Inventory:1,169
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Product details
Overview
The MAX6307UK35D3 from Maxim Integrated is a 5-pin SOT23 programmable supervisory IC that monitors VCC (factory-set to 3.5V ±2.5%), an adjustable undervoltage input (RST IN), and an adjustable overvoltage input (OVRST IN) to assert a push/pull active-low RESET output. It features a 140ms minimum reset timeout, 8µA supply current, and guaranteed RESET validity down to VCC = 1V. It is used in multivoltage embedded systems requiring reliable power-up sequencing and brownout protection.
For engineers reviewing the MAX6307UK35D3 datasheet, MAX6307UK35D3 pinout, MAX6307UK35D3 application, or MAX6307UK35D3 equivalent, key selection considerations include its dual-input monitoring capability (VCC + RST IN + OVRST IN), factory-trimmed 3.5V threshold, 140ms timeout, SOT23-5 package compatibility, and immunity to fast transients on all monitored rails.
Technical Context
The MAX6307UK35D3 implements a triple-monitoring architecture: internal factory-trimmed resistor divider for VCC supervision at 3.5V nominal, external resistor-divider–based comparator for RST IN (undervoltage), and another for OVRST IN (overvoltage). All three inputs feed into a shared reset generator with a fixed 140ms minimum timeout period (D3 variant).
Its push/pull RESET output guarantees VOL ≤ 0.3V at ISINK = 1.2mA and VOH ≥ 0.8 × VCC at ISOURCE = 150µA, enabling direct interface with 3.3V/5V µP reset inputs without external pull-ups. The device operates across 0°C to +70°C and draws only 8µA typical supply current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 3.5V ±2.5% (factory-trimmed); ensures reliable detection of 3.3V rail brownout with margin |
| Reset Timeout Period | 140ms minimum (D3 index); provides sufficient hold time for microprocessor initialization |
| Supply Current | 8µA typical at +25°C; enables use in battery-powered portable equipment |
| Operating Temperature | 0°C to +70°C; suitable for commercial-grade embedded control applications |
| RESET Output Type | Active-low push/pull; eliminates need for external pull-up resistor in most µP interfaces |
| Input Monitoring | VCC + RST IN (undervoltage) + OVRST IN (overvoltage); supports comprehensive multirail supervision |
| Transient Immunity | Immune to short VCC transients (<100ns typical); prevents false resets during switching noise |
Pinout & Package
MAX6307UK35D3 is housed in a 5-pin SOT23 package (outline U5+1, land pattern 90-0174), optimized for space-constrained PCB layouts and compatible with standard pick-and-place assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push/pull reset output | Drives µP reset pin directly; sinks ≥1.2mA and sources ≥150µA; valid down to VCC = 1V |
| 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 | Comparator input referenced to 1.23V internal bandgap; sets external rail reset threshold via resistor divider |
| 4 - OVRST IN | Adjustable overvoltage reset input | Comparator input referenced to 1.23V; asserts reset when external voltage exceeds programmed threshold |
| 5 - VCC | Primary supply and monitored rail | Power source and input to internal trimmed divider; monitored at factory-set 3.5V threshold |
Key Features
| Feature | Design Value |
|---|---|
| Triple-rail supervision | Simultaneously monitors VCC (3.5V), RST IN (user-defined undervoltage), and OVRST IN (user-defined overvoltage) |
| No external components required | Factory-trimmed VCC threshold and internal 1.23V reference eliminate need for precision resistors or capacitors |
| Guaranteed RESET validity to VCC = 1V | Ensures deterministic reset assertion during deep brownout-critical for fail-safe embedded operation |
| Low 8µA supply current | Minimizes quiescent drain in always-on battery-backed systems such as portable instrumentation |
| Transient-immune architecture | Rejects <100ns VCC glitches and fast transients on RST IN/OVRST IN, preventing spurious resets |
Applications
| Industrial PLC I/O Modules | Medical Portable Monitors |
|---|---|
Use Scenario: Power sequencing and fault detection in distributed I/O modules with mixed 3.3V logic and 24V field-side supplies. IC Role / Device Role / Timing Role: Supervises 3.3V logic rail (VCC), 24V analog front-end (via RST IN divider), and detects overvoltage on isolated bus lines (via OVRST IN). Use Value: Prevents firmware corruption during 24V surges or 3.3V brownouts by asserting RESET within 1µs of threshold violation and holding for 140ms. |
Use Scenario: Battery-powered ECG and SpO₂ monitors requiring fail-safe startup and runtime voltage integrity checks. IC Role / Device Role / Timing Role: Monitors main Li-ion supply (VCC = 3.5V threshold), backup coin-cell rail (RST IN), and detects overvoltage from charging circuitry (OVRST IN). Use Value: Enables safe shutdown and controlled reboot before battery depletion or charger fault causes data loss or sensor malfunction. |
| Automotive Body Control Units | Point-of-Sale Terminals |
Use Scenario: Power management in non-critical automotive ECUs operating from 12V battery with local 3.3V/5V regulators. IC Role / Device Role / Timing Role: Supervises 3.3V microcontroller supply (VCC), 5V display driver rail (RST IN), and guards against load-dump transients (OVRST IN). Use Value: Provides robust reset signaling under harsh automotive conditions-immune to 100ns spikes and validated over full temperature range. |
Use Scenario: Compact retail terminals with dual-supply designs (5V USB host + 3.3V SoC) and manual reset buttons. IC Role / Device Role / Timing Role: Ensures clean boot after power-on or button press; monitors both rails and rejects ESD-induced transients on USB lines. Use Value: Eliminates boot failures caused by marginal 3.3V regulation or noisy 5V USB input-no external debounce or filtering needed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable reset IC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6307EUK35D3 | Extended temperature range (-40°C to +85°C) vs. 0°C to +70°C; otherwise identical electrical specs and pinout | Suitable for industrial or automotive under-hood environments where ambient exceeds 70°C | Select MAX6307EUK35D3 when operation beyond commercial temperature range is required; same footprint and layout |
| TPS3808G33DBVR | Fixed 3.3V threshold (not programmable), 200ms timeout, open-drain output (requires pull-up), 1.6µA IQ | Lacks RST IN/OVRST IN inputs; only monitors single VCC rail; lower quiescent current but less flexible supervision | Choose TPS3808G33DBVR for cost-sensitive, single-rail 3.3V systems where dual-input monitoring is unnecessary |
Compared with MAX6307EUK35D3, the MAX6307UK35D3 trades extended temperature support for lower cost and commercial-grade qualification; compared with TPS3808G33DBVR, it offers triple-input flexibility and push/pull drive at the expense of higher IQ and higher BOM complexity.
Availability
MAX6307UK35D3 is available at Aetrix Electronics and suitable for industrial PLCs, portable medical devices, automotive body controllers, and point-of-sale terminals requiring stable component supply and long-term production continuity.
Supply support for MAX6307UK35D3 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, computing, and communications markets.
The MAX6305–MAX6313 family was designed specifically for multivoltage system supervision-enabling simultaneous monitoring of 3.3V/5V, 5V/12V, or 5V/24V rails with factory-programmable thresholds and timeout periods.
FAQ
What is the factory-programmed reset threshold voltage for MAX6307UK35D3?
The MAX6307UK35D3 has a factory-programmed VCC reset threshold of 3.5V, with tolerance of ±2.5% over the 0°C to +70°C temperature range. This value is set by an internal trimmed resistor divider and is not user-adjustable. The "35" in the part number explicitly denotes the 3.5V nominal threshold per Maxim's ordering convention.
Does MAX6307UK35D3 support manual reset functionality?
No, the MAX6307UK35D3 does not include a manual reset (MR) input. Unlike MAX6306/MAX6309/MAX6312 variants, the MAX6307/MAX6310/MAX6313 family replaces MR with the OVRST IN pin for overvoltage monitoring. Therefore, MAX6307UK35D3 lacks dedicated MR capability and cannot be externally triggered via a push-button or logic signal.
What are the absolute maximum ratings for VCC on MAX6307UK35D3?
The absolute maximum rating for VCC on MAX6307UK35D3 is +6V. Operation above this voltage risks permanent damage. The recommended operating range is (VTH + 2.5%) to +5.5V - for MAX6307UK35D3, that translates to a minimum functional VCC of approximately 3.59V (3.5V × 1.025) up to 5.5V. Below ~3.59V, VCC monitoring is not guaranteed.
Can MAX6307UK35D3 monitor a 5V rail using the RST IN pin?
Yes, MAX6307UK35D3 can monitor a 5V rail using the RST IN pin by configuring an external resistor divider to scale the 5V input down to ≤1.23V-the internal reference voltage. For example, using R1 = 309kΩ and R2 = 100kΩ yields VRST IN = 5V × 100/(309+100) ≈ 1.23V, triggering reset when the 5V rail falls below the desired threshold (e.g., 4.75V).
Is the RESET output of MAX6307UK35D3 compatible with 1.8V microcontrollers?
The RESET output of MAX6307UK35D3 is push/pull and specified to drive VOH ≥ 0.8 × VCC when sourcing 150µA. At VCC = 3.5V, VOH ≥ 2.8V - which exceeds 1.8V logic-high requirements. However, VOL ≤ 0.3V ensures solid logic-low. Thus, MAX6307UK35D3 RESET is compatible with 1.8V µPs only if the µP's reset pin accepts 3.5V-tolerant inputs; otherwise, level-shifting is required.
MAX6307UK35D3 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:
- 3.5V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6307UK35D3 FAQ
1.How can I place an order for MAX6307UK35D3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6307UK35D3 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 MAX6307UK35D3 reliable?
The price and inventory of MAX6307UK35D3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6307UK35D3 is usually 5 days.
3.What payment methods are accepted for MAX6307UK35D3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6307UK35D3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6307UK35D3?
MAX6307UK35D3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6307UK35D3 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 MAX6307UK35D3?
For technical support, including MAX6307UK35D3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6307UK35D3 requirements.
6.How does Aetrix verify that MAX6307UK35D3 is sourced from the original manufacturer or authorized distributors?
All MAX6307UK35D3 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 MAX6307UK35D3 meets industry standards.
7.What is the process for return or replacement of MAX6307UK35D3?
All MAX6307UK35D3 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6307UK35D3, 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 MAX6307UK35D3 part is unused and in its original packaging.
Return procedure for MAX6307UK35D3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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