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Analog Devices Inc./Maxim Integrated MAX6326XR26-T
- Part No.:
- MAX6326XR26-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6326XR26-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,325
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Product details
Overview
MAX6326XR26-T from Maxim Integrated is an ultra-low-power, active-low push-pull microprocessor supervisory circuit designed to monitor 2.63V power supplies and assert a reset signal during brownout, power-up, and power-down events. It features a factory-trimmed 2.63V reset threshold (±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 MAX6326XR26-T datasheet, MAX6326XR26-T pinout, MAX6326XR26-T application, or MAX6326XR26-T equivalent, this page provides verified technical context, pin-level design meaning, real-world use scenarios, and validated alternative options for µP reset circuit selection in space-constrained, low-power embedded designs.
Technical Context
The MAX6326XR26-T implements a precision voltage-monitoring comparator with hysteresis (6.3mV) and internal timing circuitry to guarantee ≥100ms reset assertion after VCC rises above 2.63V. Its reset output is push-pull active-low, eliminating external pull-up components and enabling direct interface with µP reset inputs requiring driven low signals.
It achieves immunity to fast VCC transients via internal filtering and guarantees correct state down to 1.2V VCC - critical for brownout detection in Li-ion and coin-cell powered systems. The device is fully specified across -40°C to +85°C and supports SC70-3 packaging for high-density PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63V (factory-trimmed, ±2.5% over -40°C to +85°C) - precisely matches 2.6V–2.7V rail monitoring needs without external adjustment. |
| Supply Current | 1.0µA max at 3V - enables multi-year operation in coin-cell or energy-harvesting applications. |
| Reset Timeout | 100ms min power-up delay - ensures stable µP clock and memory initialization before release. |
| VCC Operating Range | 1.2V to 5.5V - supports supervision of sub-2V logic rails and legacy 5V systems with single device. |
| Output Type | Active-low push-pull - drives reset line directly; no external pull-up required, reduces BOM count. |
| Reset Hysteresis | 6.3mV - prevents chatter during slow VCC recovery near threshold, improving system robustness. |
| Package | SC70-3 (3-pin) - 2.0mm × 2.1mm footprint ideal for wearables, sensor nodes, and compact IoT modules. |
Pinout & Package
MAX6326XR26-T is housed in a 3-pin SC70-3 package (outline X3-2, land pattern 90-0208), with 0.65mm pitch, gull-wing leads, and RoHS-compliant lead-free finish (marked "EZAA" on top).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for internal comparator and output driver; must be low-impedance connection to system ground plane. |
| 2 (RESET) | Active-low push-pull reset output | Drives low during fault; actively pulls high when released - compatible with standard µP reset inputs requiring driven-high or open-drain pull-up configurations. |
| 3 (VCC) | Supply input | Monitored power rail input; accepts 1.2V–5.5V; internally powers comparator, timer, and output stage. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 1µA max supply current enables >10-year battery life in always-on monitoring applications. |
| Precision threshold | 2.63V ±2.5% over full temperature range eliminates need for calibration or trimming in production. |
| No external components | Integrated reset timer and push-pull driver remove requirement for RC networks or external MOSFETs. |
| VCC transient immunity | Rejects <100µs negative glitches at 200mV overdrive - prevents spurious resets in noisy power environments. |
| Low-voltage operation | Guaranteed functionality down to 1.2V VCC allows supervision of deep-sleep or ultra-low-power subsystems. |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Wearable ECG patch operating from CR2032 coin cell with intermittent BLE transmission. IC Role / Device Role / Timing Role: Supervises 2.6V regulated rail; asserts RESET until VCC stabilizes post-wake-up, ensuring clean µC boot. Use Value: 1µA quiescent current extends battery life beyond 3 years; 2.63V threshold aligns exactly with LDO output tolerance. |
Use Scenario: DIN-rail mounted analog input module exposed to 24V supply ripple and cold ambient (-40°C). IC Role / Device Role / Timing Role: Monitors local 3.3V logic rail derived from switching regulator; holds µC in reset during input undervoltage events. Use Value: ±2.5% threshold accuracy over temperature prevents false resets in unheated enclosures; SC70 package saves board space in dense I/O stacks. |
| Smart Meter Battery Backup | Automotive Body Control Unit (BCU) |
|
Use Scenario: Electricity meter retaining time/date and tamper logs during main AC failure using supercapacitor backup. IC Role / Device Role / Timing Role: Watches 2.6V backup rail; triggers controlled shutdown and nonvolatile save sequence upon drop below threshold. Use Value: 100ms minimum timeout ensures complete SRAM write before power loss; 1.2V operation supports graceful decay through supercap discharge. |
Use Scenario: Low-power door module with CAN transceiver and wake-on-LIN capability. IC Role / Device Role / Timing Role: Resets MCU during 12V battery sag (e.g., cranking); ignores <100µs transients from alternator noise. Use Value: Push-pull output drives reset line without external pull-up - simplifies layout in constrained automotive harness connectors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD2-T | 2.63V threshold, SOT23-3, 1.2µA max ICC, but only guaranteed down to 1.5V VCC (vs. 1.2V for MAX6326XR26-T). | Lacks deep brownout detection below 1.5V; unsuitable for supercapacitor or LiFePO₄ backup rails. | Select MAX6326XR26-T when supervision below 1.5V is required or when SC70 size is mandatory. |
| TPS3808G12DBVR | 2.63V threshold, SOT23-6, 1.8µA ICC, adjustable delay (via capacitor), but larger footprint and higher current than MAX6326XR26-T. | Requires external capacitor for timing; not pin-compatible; adds BOM item and layout area. | Choose MAX6326XR26-T for fixed 100ms delay, minimal footprint, and lowest possible ICC in cost-sensitive volume designs. |
Compared with MAX809TRD2-T and TPS3808G12DBVR, the MAX6326XR26-T delivers superior low-voltage operation (down to 1.2V), smallest SC70-3 footprint, and lowest ICC - making it optimal for ultra-long-life, space-constrained, and deep-brownout-critical applications where fixed timing suffices.
Availability
MAX6326XR26-T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart meter battery backup systems, and automotive body control units requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for MAX6326XR26-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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX6326 family was designed specifically for ultra-low-power, precision voltage supervision in battery-operated and space-constrained embedded systems - prioritizing nanoscale ICC, tight threshold accuracy, and minimal external component count.
FAQ
What is the exact reset threshold voltage of the MAX6326XR26-T?
The MAX6326XR26-T has a factory-trimmed nominal reset threshold of 2.63V, with guaranteed tolerance of ±2.5% over the full operating temperature range (-40°C to +85°C). This value is confirmed in Table 1 of the official datasheet and corresponds to the "R26" suffix in the part number. The MAX6326XR26-T maintains this accuracy without external calibration.
Does the MAX6326XR26-T require an external pull-up resistor on its RESET pin?
No, the MAX6326XR26-T features a push-pull active-low RESET output, meaning it actively drives both high and low states. Unlike open-drain supervisors, it does not require an external pull-up resistor - reducing BOM count and PCB area. This behavior is explicitly defined in the Pin Description section for MAX6326/MAX6346 devices.
What is the minimum VCC voltage at which the MAX6326XR26-T remains functional?
The MAX6326XR26-T is guaranteed to operate correctly down to 1.2V VCC across the full temperature range (-40°C to +85°C), as stated in the Electrical Characteristics table under "VCC Range". This enables reliable brownout detection in systems powered by depleting batteries or supercapacitors, where voltage may decay below 1.5V.
Is the MAX6326XR26-T pin-compatible with the MAX809 series?
Yes - the MAX6326XR26-T is pin-compatible with the MAX803/MAX809/MAX810 family in SC70-3 and SOT23-3 packages, as confirmed in the datasheet's "Pin Compatible with…" feature bullet and Selector Guide. Both share identical 3-pin assignments (VCC, RESET, GND), enabling drop-in replacement where 2.63V threshold and ultra-low ICC are beneficial.
What package type and marking code does the MAX6326XR26-T use?
The MAX6326XR26-T uses the SC70-3 package (outline X3-2) and is top-marked "EZAA", as documented in Table 2 of the datasheet. This marking uniquely identifies the R26 threshold variant in SC70 packaging, distinguishing it from SOT23 versions (e.g., MAX6326UR26-T marked "EYAA").
MAX6326XR26-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.63V
- Output:
- Push-Pull, Totem Pole
- 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
MAX6326XR26-T FAQ
1.How can I place an order for MAX6326XR26-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6326XR26-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 MAX6326XR26-T reliable?
The price and inventory of MAX6326XR26-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6326XR26-T is usually 5 days.
3.What payment methods are accepted for MAX6326XR26-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6326XR26-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6326XR26-T?
MAX6326XR26-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6326XR26-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 MAX6326XR26-T?
For technical support, including MAX6326XR26-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6326XR26-T requirements.
6.How does Aetrix verify that MAX6326XR26-T is sourced from the original manufacturer or authorized distributors?
All MAX6326XR26-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 MAX6326XR26-T meets industry standards.
7.What is the process for return or replacement of MAX6326XR26-T?
All MAX6326XR26-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6326XR26-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 MAX6326XR26-T part is unused and in its original packaging.
Return procedure for MAX6326XR26-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6326XR26-T Tags
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MIC826SYMT-TR
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APX803S-31SA-7
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APX803L20-29SA-7
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V6340RSP3B+
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EM6325CXSP5B-2.9+
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MCP120T-300I/TT
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MCP130T-315I/TT
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