My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6326UR29-T
- Part No.:
- MAX6326UR29-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MAX6326UR29-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,384
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6326UR29-T from Maxim Integrated is an ultra-low-power, active-low push-pull microprocessor supervisory circuit designed to monitor 2.93V power supplies in embedded systems. It asserts a reset signal when VCC drops below 2.93V (±2.5% over temperature), holds reset for ≥100ms after VCC recovers, draws ≤1µA supply current at 3V, and operates from 1.2V to 5.5V across –40°C to +85°C - enabling reliable brownout protection in portable and battery-powered µP applications.
For engineers reviewing the MAX6326UR29-T datasheet, MAX6326UR29-T pinout, MAX6326UR29-T application, or MAX6326UR29-T equivalent, key selection criteria include its factory-trimmed 2.93V reset threshold, SOT23-3 package compatibility, 100ms minimum reset timeout, push-pull active-low output drive capability, and immunity to fast VCC transients up to 100V/µs slew rate.
Technical Context
The MAX6326UR29-T implements a precision bandgap-based reset comparator with 40ppm/°C tempco and 6.3mV hysteresis to prevent chatter during threshold crossing. Its internal timing circuit guarantees a minimum 100ms reset assertion after power-up or brownout recovery, independent of external components.
Designed for direct interface with microprocessor reset inputs, the push-pull output drives low (≤0.3V at 1.6mA) when asserted and high (≥0.8·VCC) when released, eliminating need for external pull-up resistors - unlike open-drain variants such as MAX6328UR29-T.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V ±2.5% over –40°C to +85°C - ensures stable brownout detection for 3V systems |
| Supply Current | ≤1.0µA at 3V - enables multi-year battery life in always-on monitoring circuits |
| Reset Timeout | 100ms to 280ms - meets JEDEC JESD78 requirement for minimum reset pulse width |
| VCC Operating Range | 1.2V to 5.5V - supports operation down to near-dead-battery voltage in portable designs |
| Output Type | Active-low push-pull - provides rail-to-rail drive without external pull-up, simplifying PCB layout |
| Transient Immunity | Immune to VCC glitches <100µs at 200mV overdrive - prevents false resets from noise |
| Package | SOT23-3 - 2.92mm × 1.3mm footprint compatible with high-density portable layouts |
Pinout & Package
SOT23-3 package: 2.92mm × 1.3mm × 1.02mm body, gull-wing leads, RoHS-compliant lead-free option available as MAX6326UR29+T.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for internal comparator and output stage; must be low-impedance connection to system ground plane |
| 2 (RESET) | Active-low push-pull reset output | Drives low (≤0.3V) during reset; drives high (≥0.8·VCC) otherwise - directly interfaces µP RESET pin without pull-up |
| 3 (VCC) | Supply input | Power source for internal circuitry; accepts 1.2V–5.5V; includes transient filtering to suppress fast VCC glitches |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 1µA max enables >10-year battery life in coin-cell-powered IoT sensors |
| Precision reset threshold | 2.93V ±2.5% over full temperature range ensures consistent brownout behavior across environments |
| No external components required | Integrated timing capacitor and comparator eliminate BOM cost and layout area vs discrete solutions |
| Push-pull output architecture | Eliminates need for external pull-up resistor, reducing component count and improving noise immunity |
| High transient immunity | Rejects VCC glitches <100µs duration, preventing spurious resets in electrically noisy industrial settings |
Applications
| Battery-Powered Data Loggers | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Continuous environmental monitoring using coin-cell power with infrequent wake-ups. IC Role / Device Role / Timing Role: Supervisory reset generator ensuring µC boots only when VCC ≥2.93V and holds reset ≥100ms during cold start. Use Value: Prevents corrupted firmware execution due to marginal supply voltage, extending usable battery life by avoiding repeated failed boot cycles. | Use Scenario: Remote sensor nodes in factory automation exposed to motor-drive EMI and wide ambient temperature swings. IC Role / Device Role / Timing Role: Brownout detector asserting reset during line sags, with guaranteed 100ms hold time to meet IEC 61000-4-11 immunity requirements. Use Value: Maintains deterministic system state during voltage dips, eliminating watchdog timeouts and uncontrolled reboots in safety-critical control loops. |
| Medical Wearable Monitors | Smart Metering Endpoints |
Use Scenario: ECG patch operating from rechargeable Li-ion with strict power budget and regulatory uptime requirements. IC Role / Device Role / Timing Role: Power-on reset supervisor with sub-1µA current draw and precise 2.93V threshold aligned to MCU's minimum operating voltage. Use Value: Guarantees clean initialization at first power application while minimizing standby current drain - critical for FDA Class II device battery certification. | Use Scenario: AMI meter with tamper-detection circuitry requiring fail-safe reset during mains interruption. IC Role / Device Role / Timing Role: Voltage monitor asserting reset within 20µs of VCC drop below 2.93V and holding ≥100ms using internal timing. Use Value: Enables seamless switchover to backup supercapacitor without data loss or register corruption during grid outage events. |
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 | Same 2.93V threshold, but higher 10µA supply current and no guaranteed operation below 1.8V | Lacks deep-battery support (<1.8V); less suitable for end-of-life battery operation | Select MAX6326UR29-T when ultra-low current (<1µA) and sub-1.8V operation are required |
| TPS3808G33DBVR | 2.93V threshold with adjustable delay, but 2.5µA typical current and SOT23-5 package | Requires external capacitor for delay tuning; larger footprint and higher quiescent draw | Select MAX6326UR29-T when fixed 100ms delay, minimal footprint, and lowest possible current are priorities |
Compared with MAX809TRD2-T and TPS3808G33DBVR, the MAX6326UR29-T delivers superior battery lifetime via 1µA max current, guaranteed functionality down to 1.2V, and true 3-pin SOT23-3 integration - making it optimal for space-constrained, long-life portable systems where every nanoamp counts.
Availability
MAX6326UR29-T is available at Aetrix Electronics and suitable for battery-powered wearables, industrial sensor nodes, smart metering endpoints, and medical telemetry devices requiring stable component supply and long-term lifecycle continuity.
Supply support for MAX6326UR29-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, automotive, and computing applications.
The MAX6326 family targets ultra-low-power microprocessor supervision in portable and energy-harvesting systems, emphasizing sub-1µA operation, factory-trimmed voltage thresholds, and minimal external component count.
FAQ
What is the exact reset threshold voltage of the MAX6326UR29-T and how tightly is it specified?
The MAX6326UR29-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 –40°C to +85°C operating temperature range. This specification is guaranteed by production test and documented in the Electrical Characteristics table of the official datasheet, ensuring predictable brownout response in 3V systems.
Does the MAX6326UR29-T require any external components to function as a reset supervisor?
No, the MAX6326UR29-T requires zero external components. Its internal precision voltage reference, comparator, and timing circuitry generate a guaranteed minimum 100ms reset pulse without capacitors or resistors - a key differentiator from discrete or older-generation supervisors that rely on RC networks for delay setting.
What is the maximum supply voltage the MAX6326UR29-T can tolerate on its VCC pin?
The MAX6326UR29-T supports a VCC operating range of 1.2V to 5.5V under normal conditions, with absolute maximum rating of –0.3V to +6V. This allows safe use in 5V systems while maintaining functionality down to near-end-of-life battery voltages, and the device remains in a valid reset state for VCC as low as 1.0V (guaranteed by design).
How does the push-pull output of the MAX6326UR29-T differ from open-drain alternatives like the MAX6328UR29-T?
The MAX6326UR29-T features an active-low push-pull output that actively drives both high (≥0.8·VCC) and low (≤0.3V at 1.6mA), eliminating the need for an external pull-up resistor. In contrast, the MAX6328UR29-T uses an open-drain output requiring a pull-up, which adds component count, increases board area, and introduces potential noise coupling paths - making the MAX6326UR29-T preferable for compact, low-noise designs.
Is the MAX6326UR29-T pin-compatible with legacy Maxim reset supervisors such as the MAX809 series?
Yes, the MAX6326UR29-T is pin-compatible with the MAX809 series in SOT23-3 packaging, sharing identical pinout (VCC, RESET, GND) and footprint. However, it improves upon the MAX809 with 10× lower supply current (1µA vs 10µA), extended low-voltage operation (down to 1.2V vs 1.8V), and tighter reset threshold accuracy - enabling drop-in upgrades in existing designs where power and voltage margin are critical.
MAX6326UR29-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- SOT-23-3
MAX6326UR29-T FAQ
1.How can I place an order for MAX6326UR29-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6326UR29-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 MAX6326UR29-T reliable?
The price and inventory of MAX6326UR29-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6326UR29-T is usually 5 days.
3.What payment methods are accepted for MAX6326UR29-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6326UR29-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6326UR29-T?
MAX6326UR29-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6326UR29-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 MAX6326UR29-T?
For technical support, including MAX6326UR29-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6326UR29-T requirements.
6.How does Aetrix verify that MAX6326UR29-T is sourced from the original manufacturer or authorized distributors?
All MAX6326UR29-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 MAX6326UR29-T meets industry standards.
7.What is the process for return or replacement of MAX6326UR29-T?
All MAX6326UR29-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6326UR29-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 MAX6326UR29-T part is unused and in its original packaging.
Return procedure for MAX6326UR29-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6326UR29-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…
