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Analog Devices Inc./Maxim Integrated MAX6305UK00D1+T
- Part No.:
- MAX6305UK00D1+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6305UK00D1+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,111
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Product details
Overview
MAX6305UK00D1+T from Maxim Integrated is a 5-pin SOT23 programmable reset IC designed to monitor VCC and two adjustable undervoltage inputs (RST IN1/RST IN2) in multivoltage systems. It asserts an active-low open-drain RESET output when any monitored supply falls below its threshold, features factory-set 2.5V VCC reset threshold, 1ms minimum reset timeout, 8µA supply current, and guaranteed RESET validity down to VCC = 1V. It is used in portable computers and embedded control systems requiring dual-supply supervision with transient immunity.
For engineers reviewing the MAX6305UK00D1+T datasheet, MAX6305UK00D1+T pinout, MAX6305UK00D1+T application, or MAX6305UK00D1+T equivalent, this page delivers verified technical context, exact pin functions, real-world use scenarios, and validated alternative options - all grounded in Maxim's official specifications for the precise part number.
Technical Context
The MAX6305UK00D1+T implements a dual-input undervoltage monitoring architecture: RST IN1 and RST IN2 are compared against a fixed 1.23V internal reference, enabling independent reset thresholds via external resistor dividers. Its VCC monitor operates across 1.0V–5.5V and guarantees valid RESET assertion down to VCC = 1V, supporting brownout detection during deep power collapse.
It uses a precision internal timing circuit to enforce a factory-programmed 1ms (min) reset timeout after all monitored voltages return to regulation. The device is immune to fast VCC transients ≤100ns at full overdrive and includes built-in hysteresis (2.5mV on RST IN inputs) to prevent chatter during threshold crossings.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.0V to 5.5V - supports operation during deep brownout and enables supervision of 1.2V/1.8V/2.5V/3.3V/5V rails. |
| Reset Threshold (VCC) | 2.5V ±1.5% (25°C), ±2.5% (0°C to +70°C) - factory-trimmed for accuracy without external components. |
| Reset Timeout Period | 1ms (min) - ensures µP reset pulse meets minimum assertion time requirements for reliable boot initialization. |
| Supply Current | 8µA (typ), 16µA (max) at 5.5V - enables multi-year battery life in portable/battery-powered equipment. |
| RESET Output Type | Active-low, open-drain - allows wired-OR configuration and direct interface with bidirectional µP reset pins (e.g., Motorola 68HC11). |
| RST IN Input Threshold | 1.23V ±0.03V - stable reference for configuring external voltage dividers to set custom undervoltage trip points. |
| Operating Temperature | 0°C to +70°C - qualified for commercial-grade applications including PCs, controllers, and intelligent instruments. |
Pinout & Package
MAX6305UK00D1+T is housed in a lead-free 5-pin SOT23 package (outline U5+1, land pattern 90-0174), optimized for space-constrained PCB layouts in portable and embedded systems.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low open-drain reset output | Drives low to assert system reset; requires external pull-up; compatible with bidirectional µP reset I/O. |
| 2 - GND | System ground reference | Return path for all internal comparators and timing circuits; must be low-impedance for noise immunity. |
| 3 - RST IN1 | Adjustable undervoltage reset input #1 | Monitors external rail via resistor divider; asserts reset when voltage falls below 1.23V reference. |
| 4 - RST IN2 | Adjustable undervoltage reset input #2 | Independent second monitoring channel; identical electrical behavior to RST IN1. |
| 5 - VCC | Main supply and primary monitored rail | Power source and first supervision target; internal circuitry remains functional down to 1.0V. |
Key Features
| Feature | Design Value |
|---|---|
| Dual adjustable reset inputs | RST IN1 and RST IN2 each compare against 1.23V reference, enabling independent supervision of two auxiliary supplies. |
| No external components required | Factory-trimmed 2.5V VCC threshold and 1ms timeout eliminate need for resistors, capacitors, or trimming. |
| Guaranteed RESET validity to VCC = 1V | Ensures deterministic reset assertion during severe brownout conditions before µP loses functionality. |
| Immunity to short VCC transients | Rejects negative-going glitches ≤100ns (at full overdrive), preventing spurious resets in noisy power environments. |
| Low 8µA supply current | Minimizes quiescent drain on battery-backed or energy-harvested systems without compromising supervision fidelity. |
Applications
| Portable Computers | Embedded Control Systems |
|---|---|
Use Scenario: Supervising 3.3V core and 5V I/O rails during battery discharge and AC adapter transitions. IC Role / Device Role / Timing Role: Dual-rail undervoltage detector asserting open-drain RESET to halt CPU execution until both supplies stabilize. Use Value: Prevents corrupted memory writes and firmware lockup by ensuring simultaneous rail readiness before boot. |
Use Scenario: Monitoring 24V field bus and 3.3V logic supply in industrial PLC modules. IC Role / Device Role / Timing Role: Independent RST IN1/RST IN2 inputs supervise isolated power domains; VCC monitors local 3.3V regulator. Use Value: Enables fail-safe shutdown of actuator drivers when either field or logic supply collapses, meeting SIL-2 requirements. |
| Intelligent Instruments | Multivoltage Systems (3V/5V) |
Use Scenario: Power sequencing and fault detection in handheld test equipment with Li-ion battery and dual DC-DC outputs. IC Role / Device Role / Timing Role: RST IN1 supervises 5V analog front-end; RST IN2 monitors 3.3V digital subsystem; VCC tracks main 3.3V rail. Use Value: Eliminates need for three discrete supervisors, reducing BOM count and PCB area while maintaining per-rail visibility. |
Use Scenario: Coordinating reset timing between legacy 5V peripherals and modern 3.3V microcontrollers in upgradeable systems. IC Role / Device Role / Timing Role: Uses RST IN1 to set 5V trip point and RST IN2 for 3.3V trip point, with synchronized 1ms timeout. Use Value: Guarantees both voltage domains meet specification before releasing reset, avoiding bus contention or latch-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable reset IC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6306UK25D1+T | Single adjustable RST IN input + manual reset (MR); VCC threshold = 2.5V; same SOT23-5 package and 1ms timeout. | Lacks second RST IN2 input; adds MR pin for operator-initiated reset - suitable where manual intervention is required. | Select when system design mandates hardware reset button capability and only one auxiliary rail needs supervision. |
| TLV803EC25DBVR | Single-input, 2.5V fixed-threshold supervisor; push-pull RESET; 350ms typical timeout; 1.8V–5.5V VCC range; SOT23-5. | No adjustable inputs or manual reset; shorter timeout; higher supply current (1.1µA typ); no RST IN1/RST IN2 flexibility. | Select for cost-sensitive, single-rail applications where minimal feature set and TI supply chain alignment outweigh dual-input needs. |
Compared with MAX6306UK25D1+T, MAX6305UK00D1+T provides dual auxiliary rail monitoring but omits manual reset; versus TLV803EC25DBVR, it offers configurable thresholds and guaranteed sub-1V operation at the cost of higher complexity and price.
Availability
MAX6305UK00D1+T is available at Aetrix Electronics and suitable for portable computers, embedded control systems, and intelligent instruments requiring stable component supply, long-term manufacturability, and RoHS-compliant packaging.
Supply support for MAX6305UK00D1+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, mixed-signal, and power management ICs for demanding industrial, computing, and communications applications.
The MAX6305–MAX6313 family was engineered specifically for multivoltage system supervision, delivering factory-programmable thresholds, dual-input flexibility, and robust transient immunity in ultra-small packages.
FAQ
What is the exact reset threshold voltage for MAX6305UK00D1+T?
The MAX6305UK00D1+T has a factory-programmed VCC reset threshold of 2.5V, with tolerance of ±1.5% at +25°C and ±2.5% over 0°C to +70°C. This value is laser-trimmed during production and does not require external calibration. The part number suffix "UK00" explicitly denotes the 2.5V nominal threshold per Maxim's ordering guide.
Does MAX6305UK00D1+T support manual reset functionality?
No, MAX6305UK00D1+T does not include a manual reset (MR) input. It belongs to the MAX6305/MAX6308/MAX6311 subgroup, which features two adjustable RST IN inputs but no MR pin. For manual reset capability, consider MAX6306UK25D1+T - a functionally similar part with identical 2.5V threshold and 1ms timeout but adding MR support.
What are the valid operating voltage ranges for VCC and RST IN inputs on MAX6305UK00D1+T?
MAX6305UK00D1+T operates with VCC from 1.0V to 5.5V and guarantees valid RESET assertion down to VCC = 1V. Each RST IN input accepts voltages from 0V to VCC − 0.3V and compares them against a stable 1.23V internal reference, enabling precise undervoltage detection across multiple rails.
Can MAX6305UK00D1+T monitor overvoltage conditions?
No, MAX6305UK00D1+T does not support overvoltage monitoring. It is designed exclusively for undervoltage detection on VCC, RST IN1, and RST IN2. Overvoltage-capable variants in the same family - such as MAX6307UK46D1+T - include a dedicated OVRST IN pin; MAX6305UK00D1+T lacks this terminal entirely per its pinout definition.
Is MAX6305UK00D1+T pin-compatible with other parts in the MAX6305–MAX6313 family?
Yes, MAX6305UK00D1+T shares the identical SOT23-5 pinout (pin 1 = RESET, pin 2 = GND, pin 3 = RST IN1, pin 4 = RST IN2, pin 5 = VCC) with all MAX6305, MAX6308, and MAX6311 variants. However, functional compatibility depends on internal configuration: only MAX6305-series parts implement dual RST IN inputs without MR or OVRST IN, so substitution requires matching functional requirements.
MAX6305UK00D1+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:
- Open Drain or Open Collector
- 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
MAX6305UK00D1+T FAQ
1.How can I place an order for MAX6305UK00D1+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6305UK00D1+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 MAX6305UK00D1+T reliable?
The price and inventory of MAX6305UK00D1+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6305UK00D1+T is usually 5 days.
3.What payment methods are accepted for MAX6305UK00D1+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6305UK00D1+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6305UK00D1+T?
MAX6305UK00D1+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6305UK00D1+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 MAX6305UK00D1+T?
For technical support, including MAX6305UK00D1+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6305UK00D1+T requirements.
6.How does Aetrix verify that MAX6305UK00D1+T is sourced from the original manufacturer or authorized distributors?
All MAX6305UK00D1+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 MAX6305UK00D1+T meets industry standards.
7.What is the process for return or replacement of MAX6305UK00D1+T?
All MAX6305UK00D1+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6305UK00D1+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 MAX6305UK00D1+T part is unused and in its original packaging.
Return procedure for MAX6305UK00D1+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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