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Analog Devices Inc./Maxim Integrated MAX6308EUK00D3+T
- Part No.:
- MAX6308EUK00D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6308EUK00D3+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,078
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Product details
Overview
The MAX6308EUK00D3+T from Maxim Integrated is a 5-pin SOT23 programmable reset IC designed to monitor dual power supplies (e.g., 5V and 3.3V) in multivoltage systems. It features a factory-programmed 0.0V reset threshold on VCC, 140ms minimum reset timeout, push/pull active-low RESET output, and guaranteed reset assertion down to VCC = 1V. It is used in portable computers and embedded control systems requiring immunity to fast transients.
For engineers reviewing the MAX6308EUK00D3+T datasheet, MAX6308EUK00D3+T pinout, MAX6308EUK00D3+T application, or MAX6308EUK00D3+T equivalent, key selection criteria include its dual-input undervoltage monitoring capability, -40°C to +85°C industrial temperature range, 8µA supply current, and compatibility with 3V/5V mixed-rail systems.
Technical Context
The MAX6308EUK00D3+T implements two adjustable undervoltage reset inputs (RST IN1 and RST IN2), each compared against a precise 1.23V internal reference. Its reset generator asserts an active-low push/pull RESET signal for ≥140ms after all monitored voltages exceed their thresholds.
It operates across VCC = 2.5V to 5.5V, guarantees valid RESET output down to VCC = 1V, and exhibits ±2.5% reset threshold accuracy over -40°C to +85°C with 40ppm/°C drift. Immunity to short VCC transients is achieved via internal filtering and hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.5V to 5.5V - supports operation across common logic rails including 3.3V and 5V systems. |
| Reset Threshold (VCC) | 0.0V factory-programmed - enables monitoring only of external supplies via RST IN1/RST IN2; no internal VCC threshold enforcement. |
| Reset Timeout Period | 140ms (min) - ensures µP reset pulse meets typical boot initialization timing requirements. |
| Supply Current | 8µA (typ) at +25°C - enables use in battery-powered portable equipment with minimal quiescent drain. |
| Operating Temperature | -40°C to +85°C - qualified for industrial and extended-temperature embedded applications. |
| RESET Output Type | Active-low push/pull - drives high/low without external pull-up; sinks 3.2mA at VCC > 4.25V. |
| Input Leakage (RST IN) | ±25nA - allows use of high-value resistor dividers (e.g., megohm range) with <25mV error at R1 = 1MΩ. |
Pinout & Package
Package: 5-pin SOT23 - surface-mount, footprint-compatible with industry-standard 5-lead small-outline transistor packages; RoHS-compliant lead-free construction (+T suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push/pull reset output | Drives low to assert system reset; sources/sinks current; valid down to VCC = 1V. |
| 2 - GND | System ground reference | Return path for all internal comparators and output stage; must be low-impedance. |
| 3 - RST IN1 | Adjustable undervoltage reset input #1 | Monitors external supply via resistor divider; triggers reset when voltage falls below 1.23V reference. |
| 4 - RST IN2 | Adjustable undervoltage reset input #2 | Independent second undervoltage monitor; identical electrical behavior to RST IN1. |
| 5 - VCC | Device supply and bias rail | Powers internal circuitry; sets operating range; no internal reset threshold applied (0.0V programmed). |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent undervoltage monitors | Enables simultaneous supervision of two distinct supply rails (e.g., 3.3V I/O and 1.8V core) using single IC. |
| Factory-programmed 0.0V VCC threshold | Disables internal VCC monitoring, allowing full flexibility to assign both RST IN1 and RST IN2 to external supplies. |
| 140ms minimum reset timeout | Meets JEDEC JESD78 and common µP reset hold-time requirements without external timing components. |
| Immunity to fast VCC transients | Rejects sub-microsecond negative glitches up to 100mV overdrive - prevents spurious resets in noisy environments. |
| Guaranteed RESET validity to VCC = 1V | Ensures reliable reset signaling during brownout conditions where supply collapses gradually. |
Applications
| Portable Computers | Embedded Control Systems |
|---|---|
Use Scenario: Supervising 3.3V main logic rail and 1.2V CPU core voltage during battery discharge cycles. IC Role / Device Role / Timing Role: Dual-input reset supervisor asserting synchronized reset if either rail drops below safe operating level. Use Value: Prevents corrupted firmware execution during partial power loss, leveraging 8µA quiescent current to extend battery life. | Use Scenario: Monitoring 5V sensor interface and 3.3V microcontroller supply in industrial PLC modules. IC Role / Device Role / Timing Role: Fault-tolerant reset generator ensuring deterministic restart after undervoltage events on either subsystem. Use Value: Eliminates need for discrete comparators and RC timers, reducing BOM count while guaranteeing 140ms reset pulse width. |
| Intelligent Instruments | Multivoltage Systems (3V/5V) |
Use Scenario: Validating stable 5V analog front-end and 2.5V ADC reference before data acquisition begins. IC Role / Device Role / Timing Role: Precision dual-threshold supervisor enabling conditional startup only when both critical supplies are in regulation. Use Value: Avoids measurement errors caused by marginal supply conditions, using ±25nA input leakage to support high-impedance sensing networks. | Use Scenario: Coordinating power sequencing between legacy 5V peripherals and modern 3.3V controllers in upgradeable equipment. IC Role / Device Role / Timing Role: Independent reset arbitration node ensuring both voltage domains meet specification before releasing system reset. Use Value: Enables clean interoperability without custom sequencing ICs, relying on factory-trimmed 1.23V reference accuracy (±2.5% over temperature). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-input reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6308EUK01D3+T | Factory-programmed VCC reset threshold = 2.5V (vs. 0.0V); same pinout, timeout, and temperature range. | Requires internal VCC monitoring - unsuitable when only external supply supervision is needed. | Select only if VCC supervision is required alongside RST IN1/RST IN2; otherwise MAX6308EUK00D3+T provides greater flexibility. |
| TPS3808G125DBVR | Single-input supervisor with adjustable threshold (0.4V–5.8V); 200ms fixed timeout; 1.5µA supply current; SOT23-6 package. | Lacks dual-input capability; requires external resistor for threshold setting; different pin count and layout. | Prefer for ultra-low-power single-rail applications; not a functional substitute for dual-supply monitoring. |
Compared with MAX6308EUK01D3+T, the MAX6308EUK00D3+T offers exclusive flexibility for pure external-supply supervision. Against TPS3808G125DBVR, it delivers true dual-rail monitoring in the same 5-pin footprint - critical for space-constrained multivoltage designs where discrete solutions would increase board area and component count.
Availability
MAX6308EUK00D3+T is available at Aetrix Electronics and suitable for portable computers, embedded control systems, and intelligent instruments requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for MAX6308EUK00D3+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 precision analog and mixed-signal ICs for power, sensing, and interface applications in industrial, computing, and communications markets.
The MAX6305–MAX6313 family was engineered specifically for multivoltage microprocessor supervisory functions - delivering dual-input monitoring, factory-programmable thresholds, and transient-immune reset generation in ultra-small SOT23 packages.
FAQ
What is the factory-programmed reset threshold on VCC for the MAX6308EUK00D3+T?
The MAX6308EUK00D3+T has a factory-programmed VCC reset threshold of 0.0V, meaning internal VCC monitoring is disabled. This allows both RST IN1 and RST IN2 pins to be used exclusively for external supply supervision via resistor dividers. The device relies entirely on those inputs to trigger reset, making it ideal for systems where VCC is not the primary monitored rail.
Does the MAX6308EUK00D3+T support operation at VCC = 2.5V?
Yes, the MAX6308EUK00D3+T operates across VCC = 2.5V to 5.5V. At VCC = 2.5V, it guarantees RESET output low-voltage performance (VOL ≤ 0.3V at ISINK = 1.2mA) and maintains full functionality of both RST IN1 and RST IN2 comparators referenced to the 1.23V internal bandgap. Its 8µA supply current remains stable across this range.
How does the 140ms reset timeout period of the MAX6308EUK00D3+T affect system startup timing?
The 140ms minimum reset timeout ensures the MAX6308EUK00D3+T holds the active-low RESET signal for at least that duration after all monitored supplies stabilize. This satisfies typical microprocessor reset-hold requirements (e.g., ARM Cortex-M, Intel Quark), preventing premature code execution. The timeout is factory-programmed and requires no external components - simplifying design and improving reliability.
Can the MAX6308EUK00D3+T monitor both 5V and 3.3V supplies simultaneously?
Yes, the MAX6308EUK00D3+T is explicitly designed for dual-supply monitoring. Using resistor dividers on RST IN1 and RST IN2, it can independently supervise a 5V rail (e.g., set threshold at 4.75V) and a 3.3V rail (e.g., set threshold at 3.14V). Its ±25nA input leakage enables high-impedance divider networks, minimizing loading on sensitive power domains.
What is the purpose of the push/pull RESET output in the MAX6308EUK00D3+T?
Unlike open-drain reset ICs, the MAX6308EUK00D3+T's push/pull RESET output actively drives both high and low states. This eliminates the need for an external pull-up resistor, reduces board space, improves noise immunity, and ensures fast, well-defined edges - especially critical in high-speed digital systems where floating reset lines could cause metastability or unintended reboots.
MAX6308EUK00D3+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:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- Adjustable/Selectable
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6308EUK00D3+T FAQ
1.How can I place an order for MAX6308EUK00D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6308EUK00D3+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 MAX6308EUK00D3+T reliable?
The price and inventory of MAX6308EUK00D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6308EUK00D3+T is usually 5 days.
3.What payment methods are accepted for MAX6308EUK00D3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6308EUK00D3+T transactions.
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4.How is shipping managed for MAX6308EUK00D3+T?
MAX6308EUK00D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6308EUK00D3+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 MAX6308EUK00D3+T?
For technical support, including MAX6308EUK00D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6308EUK00D3+T requirements.
6.How does Aetrix verify that MAX6308EUK00D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6308EUK00D3+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 MAX6308EUK00D3+T meets industry standards.
7.What is the process for return or replacement of MAX6308EUK00D3+T?
All MAX6308EUK00D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6308EUK00D3+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 MAX6308EUK00D3+T part is unused and in its original packaging.
Return procedure for MAX6308EUK00D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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