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Analog Devices Inc./Maxim Integrated MAX6308UK00D1+T
- Part No.:
- MAX6308UK00D1+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6308UK00D1+T.pdf
- Description:
- IC PROGRAM ADJ RESET SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
The MAX6308UK00D1+T from Maxim Integrated is a 5-pin SOT23 programmable reset IC designed to monitor dual undervoltage supplies (RST IN1 and RST IN2) in multivoltage systems. It features a factory-programmed 2.5V VCC reset threshold, 1ms minimum reset timeout, push/pull active-low RESET output, guaranteed reset assertion down to VCC = 1V, and immunity to fast transients-ideal for portable computers and embedded control systems requiring reliable power-on reset sequencing.
For engineers reviewing the MAX6308UK00D1+T datasheet, MAX6308UK00D1+T pinout, MAX6308UK00D1+T application, or MAX6308UK00D1+T equivalent, this device delivers precise dual-supply monitoring with no external components, low 8µA supply current, and validated operation across 0°C to +70°C industrial temperature range.
Technical Context
The MAX6308UK00D1+T implements two independent adjustable undervoltage comparators (RST IN1/RST IN2) referenced to a stable 1.23V internal bandgap, enabling flexible monitoring of separate rails like 3.3V and 5V. Its push/pull RESET output drives logic-level loads directly without pull-up resistors and remains valid over VCC = 1.0V to 5.5V.
It uses a precision internal timer to enforce a guaranteed minimum 1ms reset pulse width after all monitored voltages exceed their thresholds. The device ignores transients ≤1µs at full overdrive and exhibits ±40ppm/°C reset threshold drift, ensuring stability in thermally varying environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.0V to 5.5V - supports brownout detection down to 1V and operation with 3.3V/5V systems |
| Reset Threshold (VCC) | 2.5V ±1.5% - factory-trimmed for accurate power-fail detection on main supply rail |
| RST IN1 / RST IN2 Threshold | 1.23V ±0.03V - internal reference enables resistor-divider programming for custom supply monitoring |
| Reset Timeout (tRP) | 1ms (min) - ensures µP reset pulse meets minimum assertion time requirements per JEDEC JESD8-12 |
| Supply Current (ICC) | 8µA (typ) at +25°C - enables multi-year battery life in portable/battery-powered equipment |
| RESET Output Type | Active-low push/pull - sinks 3.2mA at VCC > 4.25V; eliminates need for external pull-up resistor |
| Operating Temperature | 0°C to +70°C - qualified for commercial and industrial-grade embedded applications |
Pinout & Package
MAX6308UK00D1+T is housed in a lead-free 5-pin SOT23 package (package code U5+1), footprint-compatible with industry-standard 5-lead SOT-23 layouts and optimized for space-constrained PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push/pull reset output | Drives microprocessor reset input directly; asserts low during power-up, brownout, or manual reset |
| 2 - GND | System ground reference | Return path for all internal comparators and output stage; must be connected to system ground plane |
| 3 - RST IN1 | Adjustable undervoltage comparator input | Monitors secondary supply (e.g., 3.3V) via external resistor divider; triggers reset if voltage falls below programmed threshold |
| 4 - RST IN2 | Adjustable undervoltage comparator input | Monitors tertiary supply (e.g., analog rail or I/O voltage); independent hysteresis prevents chatter near threshold |
| 5 - VCC | Main supply input and VCC monitor | Power source and primary monitored rail; factory-set 2.5V threshold detects main supply failure |
Key Features
| Feature | Design Value |
|---|---|
| Dual adjustable undervoltage inputs | Enables simultaneous monitoring of two independent supply rails (e.g., core and I/O) using single IC |
| Factory-programmed 2.5V VCC threshold | Eliminates external resistor network for primary supply monitoring; reduces BOM count and layout area |
| 1ms minimum reset timeout | Guarantees sufficient reset pulse width for modern microcontrollers requiring ≥1ms assertion |
| 8µA supply current | Extends battery runtime in portable instruments and handheld controllers without compromising supervision accuracy |
| Transient immunity ≤1µs | Rejects EMI-induced glitches on monitored supplies, preventing spurious resets in noisy industrial environments |
Applications
| Portable Computers | Embedded Control Systems |
|---|---|
Use Scenario: Power sequencing and fault detection in clamshell laptops with dual-core SoC, DDR memory, and display backlight supplies. IC Role / Device Role / Timing Role: Dual-rail supervisor asserting reset when either 3.3V I/O or 1.8V core rail drops during thermal throttling or battery sag. Use Value: Prevents corrupted firmware execution by enforcing clean reset before CPU exit from deep-sleep states. |
Use Scenario: Supervision of PLC I/O modules where 24V field power and 5V logic rails must remain in regulation. IC Role / Device Role / Timing Role: Monitors both 24V field bus and isolated 5V logic supply; asserts reset within 1ms if either fails. Use Value: Ensures deterministic fail-safe state transition in safety-critical automation without external timing components. |
| Intelligent Instruments | Multivoltage Systems |
Use Scenario: Battery-powered handheld multimeter with 9V alkaline supply, 3.3V ADC reference, and 1.2V sensor bias rails. IC Role / Device Role / Timing Role: Uses RST IN1 and RST IN2 to track 3.3V and 1.2V rails while VCC monitors 9V battery level. Use Value: Enables accurate low-battery warning and graceful shutdown before measurement data corruption occurs. |
Use Scenario: Industrial gateway combining 5V USB host, 3.3V wireless SoC, and 12V PoE interface. IC Role / Device Role / Timing Role: Configured to supervise 5V and 3.3V rails simultaneously; VCC tied to 5V domain for primary threshold. Use Value: Eliminates need for two discrete supervisors, reducing cost and PCB area in compact edge-node designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-input reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6308UK00D3+T | 140ms min reset timeout vs. 1ms - longer pulse for legacy µPs with slow release timing | Used where extended reset hold is required for FPGA configuration or EEPROM write completion | Select when system requires >100ms reset assertion; not drop-in due to timeout mismatch |
| TPS3808G12DBVR | Single-input (VDD only), 1.2V threshold, 200ms fixed timeout, 1.5µA ICC - lower power but no dual-rail capability | Suitable for simple single-rail microcontrollers without auxiliary supply monitoring needs | Choose only if monitoring one supply suffices; lacks RST IN1/RST IN2 flexibility of MAX6308UK00D1+T |
Compared with MAX6308UK00D3+T and TPS3808G12DBVR, the MAX6308UK00D1+T uniquely balances ultra-low quiescent current (8µA), dual-rail supervision, and minimal 1ms reset timeout-making it optimal for space- and power-constrained multivoltage systems where fast, deterministic reset recovery is critical.
Availability
MAX6308UK00D1+T is available at Aetrix Electronics and suitable for portable computers, embedded control systems, and intelligent instruments requiring stable component supply across commercial temperature grades.
Supply support for MAX6308UK00D1+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) 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 engineered specifically for multivoltage microprocessor supervision-delivering factory-programmable thresholds, dual-input flexibility, and transient-immune reset generation in miniature SOT23 packages.
FAQ
What is the factory-programmed reset threshold for MAX6308UK00D1+T?
The MAX6308UK00D1+T has a factory-programmed VCC reset threshold of 2.5V ±1.5% at +25°C, with ±2.5% tolerance over the full 0°C to +70°C operating range. This threshold is trimmed using an internal resistor divider and is documented in Table 1 of the MAX6305–MAX6313 datasheet. The "00" in the part number explicitly denotes the 2.5V nominal threshold.
Does MAX6308UK00D1+T support manual reset functionality?
No, the MAX6308UK00D1+T does not include a manual reset (MR) input. Per the selector table and pin description, MR is only present on MAX6306/MAX6309/MAX6312 variants. The MAX6308UK00D1+T provides two adjustable undervoltage inputs (RST IN1 and RST IN2) and VCC monitoring-but no MR pin-making it optimized for automated power supervision rather than operator-initiated reset.
What is the meaning of "D1" in MAX6308UK00D1+T?
The "D1" suffix in MAX6308UK00D1+T specifies a factory-programmed reset timeout period of 1ms (minimum). This is defined in the Ordering Information section: D1 = 1ms min, D2 = 20ms min, D3 = 140ms min, D4 = 1120ms min. The timeout begins when all monitored supplies exceed their thresholds and ensures the RESET signal remains asserted for at least 1ms before deassertion.
Can MAX6308UK00D1+T monitor both 3.3V and 5V supplies simultaneously?
Yes, the MAX6308UK00D1+T is explicitly designed for dual-supply monitoring: its VCC pin monitors the primary supply (factory-set to 2.5V, but used here for 5V rail supervision via external divider interpretation), while RST IN1 and RST IN2 accept resistor-divided inputs to independently monitor 3.3V and other rails. The functional diagram and Typical Operating Circuit confirm this dual-input architecture.
Is MAX6308UK00D1+T compatible with lead-free PCB assembly processes?
Yes, the "+T" suffix in MAX6308UK00D1+T indicates RoHS-compliant, lead-free packaging. The device is qualified for reflow soldering at up to +260°C (per JEDEC J-STD-020), matching standard lead-free process profiles. The package outline (U5+1) and land pattern (90-0174) are published by Maxim and fully support automated SMT placement and reflow.
MAX6308UK00D1+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- 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:
- 1ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6308UK00D1+T FAQ
1.How can I place an order for MAX6308UK00D1+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6308UK00D1+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 MAX6308UK00D1+T reliable?
The price and inventory of MAX6308UK00D1+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6308UK00D1+T is usually 5 days.
3.What payment methods are accepted for MAX6308UK00D1+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6308UK00D1+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6308UK00D1+T?
MAX6308UK00D1+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6308UK00D1+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 MAX6308UK00D1+T?
For technical support, including MAX6308UK00D1+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6308UK00D1+T requirements.
6.How does Aetrix verify that MAX6308UK00D1+T is sourced from the original manufacturer or authorized distributors?
All MAX6308UK00D1+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 MAX6308UK00D1+T meets industry standards.
7.What is the process for return or replacement of MAX6308UK00D1+T?
All MAX6308UK00D1+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6308UK00D1+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 MAX6308UK00D1+T part is unused and in its original packaging.
Return procedure for MAX6308UK00D1+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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