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Analog Devices Inc./Maxim Integrated MAX6326XR29+T
- Part No.:
- MAX6326XR29+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6326XR29+T.pdf
- Description:
- IC MPU/RESET CIRC 2.93V SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,440
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Product details
Overview
MAX6326XR29+T from Maxim Integrated is a 3-pin ultra-low-power microprocessor supervisory circuit with active-low push-pull reset output, factory-trimmed reset threshold of 2.93V (±1.5% at +25°C, ±2.5% over -40°C to +85°C), 1µA max supply current at 3V, and guaranteed operation down to VCC = 1.2V. It monitors 3.3V power rails in embedded controllers and portable systems, asserting reset for ≥100ms after VCC rises above threshold.
For engineers reviewing the MAX6326XR29+T datasheet, MAX6326XR29+T pinout, MAX6326XR29+T application, or MAX6326XR29+T equivalent, this device serves as a precision brownout detector with transient immunity, SC70-3 packaging, and compatibility with µP reset interfaces requiring active-low push-pull signaling and minimal quiescent current.
Technical Context
The MAX6326XR29+T integrates a precision voltage comparator with hysteresis (6.3mV) and an internal timer to generate a minimum 100ms reset pulse width upon power-up or brownout recovery. Its reset assertion is immune to fast VCC transients up to 100V/µs slew rate, with reset timeout specified across -40°C to +85°C.
Designed for direct connection to microprocessor reset pins, it features push-pull output capable of sourcing 500µA at 0.8·VCC and sinking 1.6mA at ≤0.3V, eliminating external pull-up resistors. The device operates from 1.2V to 5.5V VCC and maintains valid reset state down to 1V during undervoltage conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V ±1.5% (25°C); ensures reliable detection of 3.3V rail brownout before system instability |
| Supply Current | 1.0µA max at 3V; enables multi-year battery life in portable equipment |
| Reset Pulse Width | 100ms min power-up timeout; meets JEDEC JESD78 requirement for µP initialization stability |
| VCC Operating Range | 1.2V to 5.5V; supports operation during deep brownout and full 5V logic systems |
| Output Type | Active-low push-pull; drives reset line directly without external pull-up resistor |
| Tempco | 40ppm/°C; limits threshold drift to <±2.5% over full industrial temperature range |
| Reset Hysteresis | 6.3mV; prevents chatter during slow VCC recovery near threshold |
Pinout & Package
MAX6326XR29+T is housed in a 3-pin SC70-3 package (outline X3-2, land pattern 90-0208), measuring 2.0mm × 2.1mm × 0.95mm, RoHS-compliant with lead-free plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - GND | Ground reference | Return path for internal comparator and output driver; must be low-impedance to ensure accurate threshold sensing |
| 2 - RESET | Active-low push-pull reset output | Drives µP reset pin low during fault; sources 500µA at 0.8·VCC when high, sinks 1.6mA at ≤0.3V when asserted |
| 3 - VCC | Supply input | Power source for internal circuitry; accepts 1.2V–5.5V; monitored for reset generation |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 1µA max at 3V enables >10-year coin-cell operation in IoT sensors |
| Precision reset threshold | 2.93V ±1.5% at 25°C ensures consistent 3.3V rail monitoring without calibration |
| Transient immunity | Immune to VCC glitches ≤100V/µs slew rate; avoids false resets in noisy power environments |
| No external components | Integrated timer and comparator eliminate need for RC networks or discrete comparators |
| Guaranteed reset state down to 1V | Maintains valid output even during severe brownout, preventing undefined µP behavior |
Applications
| Industrial Controllers | Portable Medical Devices |
|---|---|
|
Use Scenario: PLC I/O modules operating on 3.3V rails in factory-floor environments with switching power supply noise. IC Role / Device Role / Timing Role: Brownout detector that asserts reset during AC line sags or DC-DC converter dropout, holding µP in reset until stable 3.3V is restored for ≥100ms. Use Value: Prevents firmware corruption by ensuring clean boot after power disturbance, leveraging 40ppm/°C tempco for stable threshold across ambient temperature swings. |
Use Scenario: Handheld glucose meters powered by single CR2032 coin cell with declining voltage profile. IC Role / Device Role / Timing Role: Low-voltage supervisor that triggers reset when battery drops below 2.93V, enabling graceful shutdown before data loss. Use Value: 1µA max ICC extends usable battery life beyond 5 years; SC70-3 footprint minimizes PCB area in space-constrained handheld enclosures. |
| Network Edge Routers | Smart Energy Meters |
|
Use Scenario: Ethernet switch SoCs requiring deterministic reset timing during PoE power negotiation cycles. IC Role / Device Role / Timing Role: Power-on reset generator with 100ms minimum timeout, synchronized to 3.3V rail stabilization after PoE handshaking completes. Use Value: Push-pull output eliminates external pull-up, reducing BOM count; 1.2V–5.5V VCC range accommodates auxiliary 2.5V domains. |
Use Scenario: ANSI C12.20-compliant electricity meters exposed to wide temperature (-40°C to +85°C) and voltage fluctuation. IC Role / Device Role / Timing Role: Precision reset supervisor for metrology µC, asserting reset during grid voltage sags below 2.93V with ±2.5% tolerance over full temperature range. Use Value: Factory-trimmed threshold eliminates field calibration; SC70-3 package withstands reflow and conforms to IPC-7351B land pattern standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD29+T | Same 2.93V threshold, but 3.5µA max ICC and SOT23-3 only; no SC70 option | Larger supply current reduces battery lifetime in portable designs; identical pinout but different package footprint | Select when legacy SOT23 layout exists and ultra-low ICC is not critical |
| TPS3808G33DBVR | 2.93V threshold with 1.8µA max ICC; requires external pull-up for open-drain variant; no push-pull option | Open-drain output mandates external pull-up resistor, increasing component count and leakage risk in high-impedance nodes | Choose only if system requires configurable reset polarity or dual-supply monitoring capability |
Compared with MAX809TRD29+T and TPS3808G33DBVR, the MAX6326XR29+T delivers lowest ICC (1µA), native push-pull drive (no external resistor), and SC70-3 packaging-making it optimal for space- and power-constrained 3.3V µP systems where deterministic reset timing and long battery life are essential.
Availability
MAX6326XR29+T is available at Aetrix Electronics and suitable for industrial controllers, portable medical devices, network edge routers, and smart energy meters requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX6326XR29+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 analog and mixed-signal ICs for power management, sensing, and interface applications.
The MAX6326 family was designed specifically for ultra-low-power microprocessor supervision in battery-powered and space-constrained embedded systems, emphasizing precision threshold accuracy, minimal quiescent current, and robust transient immunity.
FAQ
What is the exact reset threshold voltage of the MAX6326XR29+T?
The MAX6326XR29+T has a factory-trimmed nominal reset threshold of 2.93V, with tolerance of ±1.5% at +25°C and ±2.5% over the full operating temperature range of -40°C to +85°C. This value is laser-trimmed during production and verified per Electrical Characteristics table in the datasheet; the "R29" suffix explicitly denotes the 2.93V variant of the MAX6326XR29+T.
Does the MAX6326XR29+T require external components to function?
No, the MAX6326XR29+T requires no external components. Its internal precision voltage comparator, reference, and timer generate a guaranteed minimum 100ms reset pulse width without RC networks or additional passives. The push-pull output drives the µP reset pin directly-eliminating the need for an external pull-up resistor required by open-drain alternatives.
What package type and dimensions does the MAX6326XR29+T use?
The MAX6326XR29+T uses the SC70-3 package (outline X3-2), measuring 2.0mm × 2.1mm × 0.95mm with a standard 0.65mm pin pitch. It is RoHS-compliant and marked "FCAA" on top. This 3-pin surface-mount package is distinct from the SOT23-3 variant (U3-1 outline) and requires its own land pattern (90-0208).
How does the MAX6326XR29+T behave during fast VCC transients?
The MAX6326XR29+T is designed to ignore fast negative-going VCC transients up to 100V/µs slew rate. Its reset comparator incorporates filtering to prevent false triggering from short-duration power supply glitches. The Typical Operating Characteristics graph "Maximum Transient Duration vs. Reset Threshold Overdrive" quantifies immunity: for a 2.93V threshold, transients under ~100mV amplitude can be up to ~150µs wide without causing reset assertion.
Is the MAX6326XR29+T compatible with microcontrollers having bidirectional reset pins?
The MAX6326XR29+T is not optimized for bidirectional reset pins because it features a push-pull output-not open-drain. For bidirectional µP interfaces (e.g., Motorola 68HC11), Maxim recommends the MAX6328XR29+T (open-drain variant). Using MAX6326XR29+T in such configurations risks bus contention; always verify µP reset pin electrical specifications before integration.
MAX6326XR29+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:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.93V
- 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
MAX6326XR29+T FAQ
1.How can I place an order for MAX6326XR29+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6326XR29+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 MAX6326XR29+T reliable?
The price and inventory of MAX6326XR29+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6326XR29+T is usually 5 days.
3.What payment methods are accepted for MAX6326XR29+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6326XR29+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6326XR29+T?
MAX6326XR29+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6326XR29+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 MAX6326XR29+T?
For technical support, including MAX6326XR29+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6326XR29+T requirements.
6.How does Aetrix verify that MAX6326XR29+T is sourced from the original manufacturer or authorized distributors?
All MAX6326XR29+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 MAX6326XR29+T meets industry standards.
7.What is the process for return or replacement of MAX6326XR29+T?
All MAX6326XR29+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6326XR29+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 MAX6326XR29+T part is unused and in its original packaging.
Return procedure for MAX6326XR29+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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