My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6328XR25-T
- Part No.:
- MAX6328XR25-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6328XR25-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:30,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6328XR25-T from Maxim Integrated is an ultra-low-power open-drain microprocessor supervisory circuit designed to monitor 2.5V power supplies and assert an active-low reset signal during brownout, power-up, or power-down events. It features a factory-trimmed 2.500V reset threshold (±1.5% at +25°C, ±2.5% over -40°C to +85°C), 100ms minimum reset timeout, 1µA max supply current at 3V, and operates down to 1.2V VCC. It is used in portable battery-powered systems requiring reliable, low-quiescent-power reset supervision.
For engineers reviewing the MAX6328XR25-T datasheet, MAX6328XR25-T pinout, MAX6328XR25-T application, or MAX6328XR25-T equivalent, this page delivers verified technical context, precise SC70-3 package details, confirmed open-drain output behavior, temperature-stable reset timing, and validated alternative options for 2.5V µP reset supervision.
Technical Context
The MAX6328XR25-T implements a precision bandgap-based reset comparator with 40ppm/°C tempco and 6.3mV hysteresis, ensuring stable trip-point performance across -40°C to +85°C. Its open-drain RESET output requires an external pull-up and supports bidirectional µP reset interfaces (e.g., Motorola 68HC11), enabling either the supervisor or microcontroller to assert reset.
It ignores fast VCC transients-maximum glitch rejection is 200µs at 100mV overdrive-and guarantees correct reset state down to 1.2V VCC. The device is fully specified with no external components required and exhibits immunity to negative-going supply glitches typical in battery-backed or switching-regulator environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.500V ±1.5% (25°C); ±2.5% (-40°C to +85°C) - ensures accurate 2.5V supply monitoring with guaranteed margin against false resets |
| Supply Current | 1.0µA max at 3V - enables multi-year operation in coin-cell–powered devices without compromising supervision reliability |
| Reset Timeout | 100ms min after VCC rise - meets JEDEC JESD76 requirements for safe µP initialization and peripheral stabilization |
| Output Type | Open-drain RESET - allows wired-OR configuration, level translation via external pull-up, and bidirectional reset arbitration |
| Operating Voltage Range | 1.2V to 5.5V - supports supervision of deep-sleep states and brownout recovery down to near-dead-battery conditions |
| Tempco | 40ppm/°C - limits threshold drift to <15mV over full temperature range, critical for precision 2.5V rail integrity |
| Hysteresis | 6.3mV - prevents oscillatory reset assertion near threshold due to noise or slow-rising VCC |
Pinout & Package
MAX6328XR25-T is housed in a 3-pin SC70-3 package (outline 21-0075, land pattern 90-0208), measuring 2.0mm × 2.1mm × 0.95mm, with gull-wing leads and RoHS-compliant lead-free finish (marked "FQAA" on top).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage; must be connected directly to system ground plane for noise immunity |
| 2 | RESET | Active-low open-drain output; sinks up to 1.6mA when asserted; requires external pull-up resistor to host VCC or logic rail |
| 3 | VCC | Power supply input; monitors itself for reset generation; accepts 1.2V–5.5V with full functionality guaranteed |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low 1µA supply current | Enables integration into always-on, energy-harvesting, or battery-backed systems without measurable impact on standby life |
| Factory-trimmed 2.500V threshold | Eliminates need for external resistor dividers or calibration; reduces BOM count and layout area in space-constrained designs |
| 100ms minimum reset pulse width | Guarantees sufficient time for flash memory initialization, PLL lock, and clock domain synchronization before µP release |
| Open-drain output with 0.3V VOL @ 1.6mA | Ensures clean logic-low assertion even under heavy capacitive loading or long PCB traces, supporting robust system-level reset propagation |
| Transient immunity up to 200µs at 100mV overdrive | Rejects common switching regulator noise and ESD-induced supply dips without spurious reset generation |
Applications
| Battery-Powered Portable Instruments | Industrial Sensor Nodes |
|---|---|
Use Scenario: Handheld multimeters and portable gas analyzers operating from single-cell Li-ion or alkaline batteries with wide VCC swing during discharge. IC Role / Device Role / Timing Role: Monitors 2.5V LDO output feeding µC and analog front-end; asserts reset if battery drops below 2.6V to prevent corrupted ADC reads or EEPROM writes. Use Value: Prevents firmware crashes and data corruption by enforcing hard reset before supply falls below µC operational minimum, leveraging 1.2V functional guarantee. | Use Scenario: Wireless temperature/humidity nodes deployed in factory environments with intermittent power and EMI exposure. IC Role / Device Role / Timing Role: Supervises 2.5V rail powering LoRaWAN transceiver and ARM Cortex-M0+; holds reset during cold-start and voltage sags caused by motor switching noise. Use Value: Ensures deterministic boot sequence despite 200µs transients on 2.5V rail, eliminating field failures from marginal brownout conditions. |
| Medical Point-of-Care Devices | Embedded Control Panels |
Use Scenario: Battery-backed glucose meters requiring FDA-grade reliability and zero false resets during rapid battery depletion. IC Role / Device Role / Timing Role: Provides fail-safe reset supervision for safety-critical ARM-based controller; open-drain output interfaces with µC's bidirectional reset pin per IEC 62304. Use Value: Meets Class B software safety requirements by guaranteeing ≥100ms reset hold time and 40ppm/°C threshold stability across clinical temperature ranges. | Use Scenario: DIN-rail mounted HMI panels using 2.5V FPGA configuration rails subject to surges from adjacent 24V control circuits. IC Role / Device Role / Timing Role: Guards FPGA configuration memory and display driver ICs; asserts reset on any dip below 2.5V, including those induced by relay coil flyback. Use Value: Prevents display artifacts and touch controller lockups by enforcing clean power-on sequencing, enabled by no-external-component design and transient immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TR25-T | Same SC70-3 package, 2.5V threshold, but push-pull output; 1.2µA max ICC; no open-drain capability | Requires redesign if bidirectional reset or level translation is needed; not suitable for wired-OR reset buses | Select only when push-pull drive and simplified interface outweigh need for µP-initiated reset assertion |
| TPS3808G25DBVR | 2.5V threshold, open-drain output, but 1.8µA ICC; supports manual reset input; 200ms default timeout (adjustable) | Offers manual reset and timeout flexibility but higher quiescent current compromises ultra-low-power use cases | Prefer when system-level reset coordination (e.g., watchdog-triggered or button-initiated) is required alongside power supervision |
Compared with MAX6328XR25-T, MAX809TR25-T lacks open-drain flexibility and cannot support bidirectional reset arbitration, while TPS3808G25DBVR trades 0.8µA extra supply current for manual reset capability-making MAX6328XR25-T optimal for fixed-function, lowest-power 2.5V supervision where reset source autonomy matters.
Availability
MAX6328XR25-T is available at Aetrix Electronics and suitable for battery-powered portable instruments, industrial sensor nodes, medical point-of-care devices, embedded control panels, and wireless edge nodes requiring stable component supply with guaranteed long-term manufacturability.
Supply support for MAX6328XR25-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, communications, and consumer applications.
The MAX6326/MAX6327/MAX6328 series was designed specifically for ultra-low-power microprocessor reset supervision in space-constrained, battery-sensitive systems-emphasizing sub-1µA operation, factory-trimmed accuracy, and minimal external component count.
FAQ
What is the exact reset threshold voltage of MAX6328XR25-T and how stable is it over temperature?
The MAX6328XR25-T has a nominal reset threshold of 2.500V, with ±1.5% tolerance at +25°C and ±2.5% over the full -40°C to +85°C operating range. Its temperature coefficient is tightly controlled at 40ppm/°C, resulting in less than 15mV total drift across temperature-ensuring consistent 2.5V rail supervision without recalibration or margining overhead in the MAX6328XR25-T design.
Does MAX6328XR25-T support bidirectional reset functionality with microcontrollers like the Motorola 68HC11?
Yes, the MAX6328XR25-T supports bidirectional reset through its open-drain RESET output. When paired with an external pull-up resistor, both the MAX6328XR25-T and the µP (e.g., Motorola 68HC11) can assert reset on the shared line-enabling system-level fault recovery initiated either by power failure (via MAX6328XR25-T) or software watchdog timeout (via µP), a key interoperability feature of the MAX6328XR25-T.
What is the minimum VCC voltage at which MAX6328XR25-T remains functional and guarantees correct reset state?
The MAX6328XR25-T is guaranteed to maintain correct reset state down to 1.2V VCC across the full -40°C to +85°C temperature range. This allows reliable brownout detection and reset assertion even as battery voltage decays near end-of-life, making the MAX6328XR25-T especially suited for single-cell Li-ion or alkaline-powered applications where supply collapse must be caught early.
Can MAX6328XR25-T replace MAX809TR25-T in an existing design without layout changes?
No-while both are SC70-3 packaged 2.5V supervisors, MAX6328XR25-T has an open-drain output whereas MAX809TR25-T uses push-pull. Replacing one with the other requires verifying pull-up presence (for MAX6328XR25-T) and checking µP reset pin compatibility; direct substitution is not recommended without circuit review, as the MAX6328XR25-T output structure fundamentally differs from MAX809TR25-T.
What is the maximum transient duration that MAX6328XR25-T will ignore on the VCC line before asserting reset?
At a 100mV overdrive (i.e., VCC = VTH − 100mV = 2.400V), the MAX6328XR25-T will ignore transients up to 200µs in duration, as shown in the Typical Operating Characteristics graph (MAX6326 toc04). This immunity prevents false resets from switching regulator noise or ESD coupling, a core reliability feature engineered into the MAX6328XR25-T's comparator architecture.
MAX6328XR25-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.5V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 100ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
MAX6328XR25-T FAQ
1.How can I place an order for MAX6328XR25-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6328XR25-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 MAX6328XR25-T reliable?
The price and inventory of MAX6328XR25-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6328XR25-T is usually 5 days.
3.What payment methods are accepted for MAX6328XR25-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6328XR25-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6328XR25-T?
MAX6328XR25-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6328XR25-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 MAX6328XR25-T?
For technical support, including MAX6328XR25-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6328XR25-T requirements.
6.How does Aetrix verify that MAX6328XR25-T is sourced from the original manufacturer or authorized distributors?
All MAX6328XR25-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 MAX6328XR25-T meets industry standards.
7.What is the process for return or replacement of MAX6328XR25-T?
All MAX6328XR25-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6328XR25-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 MAX6328XR25-T part is unused and in its original packaging.
Return procedure for MAX6328XR25-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6328XR25-T Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
