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Analog Devices Inc./Maxim Integrated MAX6305UK00D1
- Part No.:
- MAX6305UK00D1
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6305UK00D1.pdf
- Description:
- IC SUPERVISOR PROGRAMMABLE RESET
- Quantity:
- Payment:
- Shipping:
Inventory:2,835
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Product details
Overview
MAX6305UK00D1 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 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 reliable power-on reset.
For engineers reviewing the MAX6305UK00D1 datasheet, MAX6305UK00D1 pinout, MAX6305UK00D1 application, or MAX6305UK00D1 equivalent, key selection considerations include its dual adjustable reset inputs, immunity to fast VCC transients, factory-programmed 2.5V threshold, 1ms timeout option, and SOT23-5 package compatibility with space-constrained designs.
Technical Context
The MAX6305UK00D1 implements a dual-input undervoltage monitoring architecture: RST IN1 and RST IN2 accept external resistor dividers to set custom reset thresholds referenced to a 1.23V internal bandgap, while VCC is monitored directly without internal divider. Its open-drain RESET output requires an external pull-up and remains valid down to VCC = 1V.
It uses a precision internal voltage reference (±1.5% at +25°C, ±2.5% over temperature) and incorporates transient immunity circuitry that rejects negative-going VCC glitches up to 10µs at 100mV overdrive. 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 | Factory-set to 2.5V ±1.5% at +25°C; ensures reliable reset assertion when main supply drops below nominal 2.5V rail. |
| Reset Timeout Period | 1ms minimum (D1 suffix); guarantees µP remains held in reset long enough for stable power ramp-up before release. |
| Supply Current | 8µA typical at +25°C; enables use in battery-powered equipment with multi-year standby life. |
| RESET Validity Range | Guaranteed down to VCC = 1V; supports robust reset signaling during deep brownout conditions. |
| Input Leakage | ±25nA max on RST IN1/RST IN2; permits use of high-value (MΩ-range) resistor dividers with minimal threshold error. |
| Transient Immunity | Rejects VCC glitches ≤10µs at 100mV overdrive; prevents spurious resets from switching noise or ESD coupling. |
| Operating Temperature | 0°C to +70°C; suitable for commercial-grade computing and industrial control environments. |
Pinout & Package
The MAX6305UK00D1 is housed in a 5-pin SOT23 package (outline U5+1, land pattern 90-0174), measuring 2.9mm × 1.6mm × 1.1mm, with gull-wing leads compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low open-drain reset output | Drives low to assert system reset; requires external pull-up; sinks current only; compatible with bidirectional µP reset pins. |
| 2 - GND | System ground reference | Return path for all internal comparators and output stage; must be connected to lowest-impedance system ground plane. |
| 3 - RST IN1 | Adjustable undervoltage reset input | Monitors external voltage via resistor divider; asserts reset when input falls below 1.23V reference; ±25nA leakage enables high-Z sensing. |
| 4 - RST IN2 | Second adjustable undervoltage reset input | Independent comparator input identical to RST IN1; allows dual-rail monitoring (e.g., 3.3V and 1.8V supplies) with separate thresholds. |
| 5 - VCC | Main supply input and monitored rail | Powers the IC and serves as primary monitored supply; factory-trimmed 2.5V threshold applies directly to this pin. |
Key Features
| Feature | Design Value |
|---|---|
| Dual adjustable reset inputs | RST IN1 and RST IN2 each interface with external resistor dividers to independently monitor two different supply rails or thresholds. |
| Factory-programmed 2.5V threshold | Eliminates external component count for VCC monitoring; reduces BOM cost and layout area versus discrete resistor-divider solutions. |
| 1ms minimum reset timeout | Ensures sufficient hold time for slow-ramping supplies or clock stabilization before µP execution resumes. |
| 8µA ultra-low quiescent current | Enables integration into always-on subsystems without compromising battery runtime in portable equipment. |
| Immunity to fast VCC transients | Rejects sub-10µs negative glitches-critical in noisy switch-mode power supply environments where false resets must be avoided. |
Applications
| Portable Computers | Embedded Control Systems |
|---|---|
Use Scenario: Monitoring 3.3V and 1.8V core logic rails during boot and runtime in clamshell laptops with dual-voltage SoCs. IC Role / Device Role / Timing Role: Dual-rail supervisor asserting open-drain RESET to prevent firmware corruption during simultaneous rail collapse. Use Value: Prevents boot failure caused by mismatched rail sequencing or transient-induced brownout on either supply. | Use Scenario: Ensuring deterministic startup of PLC I/O modules powered by isolated 5V and 24V rails. IC Role / Device Role / Timing Role: Primary reset generator coordinating power-good sequencing between field-side and controller-side supplies. Use Value: Guarantees microcontroller enters known state only after both safety-critical and logic rails stabilize. |
| Intelligent Instruments | Multivoltage Systems: 3V/5V |
Use Scenario: Power supervision in handheld multimeters with segmented LCD, analog front-end, and MCU-all operating from shared coin-cell battery. IC Role / Device Role / Timing Role: Low-current supervisor using RST IN1 to monitor analog supply and RST IN2 for digital supply, with VCC tied to battery. Use Value: Extends usable battery life by enabling operation down to 1.0V while maintaining accurate reset assertion. | Use Scenario: Reset coordination in legacy industrial controllers interfacing 5V TTL logic and 3.3V FPGAs. IC Role / Device Role / Timing Role: Single-chip solution monitoring both rails via RST IN1 (5V divider) and RST IN2 (3.3V divider), with VCC = 5V. Use Value: Replaces two discrete supervisors, reducing PCB area and eliminating timing skew between independent reset signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar reset supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6306UK25D1-T | Same SOT23-5 package and 1ms timeout, but monitors VCC only (no RST IN1/RST IN2); factory-set 2.5V threshold. | Lacks dual adjustable inputs; suitable only for single-rail monitoring where external dividers are unnecessary. | Select when only VCC supervision is required and board space must accommodate identical footprint. |
| TPS3808G01DBVR | 3-pin SOT23, fixed 1.0V threshold, 20ms timeout default (adjustable via capacitor), 1.6µA supply current. | No adjustable inputs; lower quiescent current but no multirail capability; requires external timing capacitor. | Prefer for ultra-low-power single-supply applications where 1ms timeout and dual inputs are not needed. |
Compared with MAX6306UK25D1-T, the MAX6305UK00D1 adds dual adjustable reset inputs at the cost of slightly higher supply current; compared with TPS3808G01DBVR, it offers precise 1ms timeout and multirail flexibility but consumes more current and requires no external capacitor.
Availability
MAX6305UK00D1 is available at Aetrix Electronics and suitable for portable computers, embedded control systems, and intelligent instruments requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6305UK00D1 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 microprocessor supervision in space-constrained, low-power systems requiring precise, glitch-immune reset generation across multiple rails.
FAQ
What is the factory-set reset threshold for MAX6305UK00D1?
The MAX6305UK00D1 has a factory-set VCC reset threshold of 2.5V, with ±1.5% tolerance at +25°C and ±2.5% over the full 0°C to +70°C operating range. This threshold applies directly to the VCC pin and is trimmed during manufacturing-no external components are required to configure it. The MAX6305UK00D1 does not use an internal resistor divider for VCC monitoring, unlike other members of the MAX6305–MAX6313 family.
Does MAX6305UK00D1 support manual reset functionality?
No, the MAX6305UK00D1 does not include a manual reset (MR) input. Pin 3 and Pin 4 are dedicated to RST IN1 and RST IN2-adjustable undervoltage inputs-and there is no MR pin assigned. Manual reset capability is present only in MAX6306/MAX6309/MAX6312 variants. For MAX6305UK00D1, system reset is triggered exclusively by VCC, RST IN1, or RST IN2 falling below their respective thresholds.
What is the maximum VCC voltage the MAX6305UK00D1 can tolerate?
The MAX6305UK00D1 has an absolute maximum VCC rating of +6V, but its functional operating range is specified from +2.5V to +5.5V. Operation below +2.5V places the device in undervoltage lockout mode, where RESET is asserted until VCC rises above ~2.5V. Exceeding +5.5V may cause undefined behavior or damage, even if within the +6V absolute maximum limit.
Can MAX6305UK00D1 monitor overvoltage conditions?
No, the MAX6305UK00D1 does not support overvoltage monitoring. It provides two undervoltage inputs (RST IN1 and RST IN2) and monitors VCC for undervoltage only. Overvoltage reset capability (OVRST IN) is available only in MAX6307/MAX6310/MAX6313 variants. For MAX6305UK00D1, all three monitored inputs respond solely to voltage drops below their programmed thresholds.
Is the RESET output of MAX6305UK00D1 push-pull or open-drain?
The RESET output of MAX6305UK00D1 is active-low open-drain. It can sink current but cannot source current, requiring an external pull-up resistor to VCC or another logic rail. This configuration enables wired-OR connectivity with other open-drain reset sources (e.g., watchdog timers or other supervisors) and is compatible with bidirectional µP reset pins such as those found on Motorola 68HC11 derivatives.
MAX6305UK00D1 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:
- 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 FAQ
1.How can I place an order for MAX6305UK00D1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6305UK00D1 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 reliable?
The price and inventory of MAX6305UK00D1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6305UK00D1 is usually 5 days.
3.What payment methods are accepted for MAX6305UK00D1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6305UK00D1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6305UK00D1?
MAX6305UK00D1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6305UK00D1 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?
For technical support, including MAX6305UK00D1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6305UK00D1 requirements.
6.How does Aetrix verify that MAX6305UK00D1 is sourced from the original manufacturer or authorized distributors?
All MAX6305UK00D1 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 meets industry standards.
7.What is the process for return or replacement of MAX6305UK00D1?
All MAX6305UK00D1 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6305UK00D1, 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 part is unused and in its original packaging.
Return procedure for MAX6305UK00D1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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