My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6328XR26
- Part No.:
- MAX6328XR26
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6328XR26.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,774
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6328XR26 from Maxim Integrated is an ultra-low-power, open-drain, active-low microprocessor supervisory circuit in SC70-3 package, designed to monitor 2.63V power supplies and assert a reset signal during brownout or power-up/down events. It guarantees correct operation down to VCC = 1.2V, delivers ≤1µA supply current at +25°C, provides ≥100ms reset timeout after VCC recovery, and features factory-trimmed reset threshold of 2.630V ±1.5% at +25°C with ±2.5% over –40°C to +85°C.
For engineers reviewing the MAX6328XR26 datasheet, MAX6328XR26 pinout, MAX6328XR26 application, or MAX6328XR26 equivalent, this device is selected for battery-powered µP systems requiring precise 2.63V supply monitoring, immunity to fast VCC transients, minimal board space (SC70-3), and compatibility with bidirectional reset pins such as those on Motorola 68HC11 microcontrollers.
Technical Context
The MAX6328XR26 implements a precision bandgap-based voltage comparator with hysteresis (6.3mV) and internal timing circuitry to generate a minimum 100ms reset pulse width after VCC rises above the 2.63V threshold. Its open-drain RESET output requires an external pull-up resistor and supports bidirectional reset assertion in shared-reset architectures.
It operates across –40°C to +85°C with full electrical specification, exhibits 40ppm/°C reset threshold tempco, and rejects negative-going VCC transients up to 200µs duration when VCC dips 200mV below threshold - enabling robust operation in noisy power environments without external filtering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.630V ±1.5% at +25°C; ±2.5% over –40°C to +85°C - ensures accurate 2.63V supply monitoring across industrial temperature range |
| Supply Current | ≤1.0µA max at +25°C, VCC = 3.0V - enables multi-year operation in coin-cell–powered devices |
| Reset Timeout | 100ms min (185ms typ, 280ms max) after VCC exceeds threshold - meets µP power-on initialization timing requirements |
| Output Type | Open-drain active-low RESET - allows wired-OR configuration and direct interface with bidirectional µP reset pins |
| VCC Operating Range | 1.2V to 5.5V - supports valid reset assertion even during deep brownout conditions down to 1.2V |
| Reset Hysteresis | 6.3mV - prevents oscillatory reset assertion near threshold due to noise or slow-rising VCC |
| Transient Immunity | Rejects VCC glitches ≤200µs wide at 200mV overdrive - eliminates false resets in electrically noisy systems |
Pinout & Package
MAX6328XR26 is housed in a 3-pin SC70-3 package (outline X3-2, land pattern 90-0208), measuring 2.0mm × 2.1mm × 0.95mm, with gull-wing leads and RoHS-compliant lead-free finish (marked "FRAA").
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and output stage; must be low-impedance connection to system ground plane |
| 2 | RESET | Open-drain active-low reset output; requires external pull-up resistor (typically 10kΩ to VCC or another rail); sinks ≥1.6mA when asserted |
| 3 | VCC | Power supply input; monitors this rail for reset generation; accepts 1.2V–5.5V; includes internal ESD protection to ±6V |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low ICC | 1µA maximum supply current enables >10-year battery life in portable instrumentation |
| Factory-trimmed VTH | 2.630V threshold set at wafer level with ±1.5% room-temp accuracy - eliminates calibration overhead |
| Open-drain RESET | Supports multi-source reset arbitration and direct interface with Motorola 68HC11–class bidirectional reset pins |
| Guaranteed 1V operation | Valid reset state maintained down to VCC = 1.2V - ensures deterministic behavior during deep brownout |
| Transient immunity | Immune to VCC glitches <200µs at 200mV overdrive - removes need for external RC filtering on supply rail |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
|
Use Scenario: Battery-powered wearable ECG sensor operating from a 2.63V LDO output, requiring reliable reset during battery voltage sag. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to ARM Cortex-M0 MCU upon VCC drop below 2.63V, holding reset ≥100ms after recovery. Use Value: Prevents MCU lockup during intermittent battery contact; 1µA ICC extends single-CR2032 lifetime beyond 5 years. |
Use Scenario: DIN-rail mounted PLC module powered by 2.63V isolated DC-DC converter in factory automation cabinet. IC Role / Device Role / Timing Role: Power-on supervisor ensuring deterministic µP startup after AC line interruption; open-drain output interfaces with fieldbus controller's bidirectional reset pin. Use Value: Eliminates need for discrete reset IC + RC network; SC70-3 footprint saves PCB area in space-constrained I/O carrier boards. |
| Smart Meter Data Loggers | Automotive Body Control Units |
|
Use Scenario: AMI smart meter using 2.63V rail for real-time clock and flash memory, subject to load-switching transients. IC Role / Device Role / Timing Role: Voltage monitor rejecting sub-200µs VCC dips caused by relay switching noise while asserting clean reset pulse. Use Value: Prevents flash corruption during grid voltage sags; 6.3mV hysteresis avoids chatter near threshold during slow VCC ramp. |
Use Scenario: Low-power BCM subsystem powered from 2.63V backup rail during ignition-off, monitoring battery health. IC Role / Device Role / Timing Role: Brownout detector asserting RESET to Infineon AURIX TC2xx MCU when 12V battery drops below regulation threshold. Use Value: Ensures safe shutdown before EEPROM write corruption; guaranteed operation to –40°C supports cold-climate deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6328UR26 | Same electrical specs and reset threshold, but in SOT23-3 package (4.0mm × 2.8mm vs SC70-3's 2.0mm × 2.1mm) | Preferred where hand-soldering or legacy footprint compatibility is required; larger thermal mass improves power dissipation margin | Select MAX6328UR26 if board layout uses standard SOT23-3 land pattern or requires higher IPC Class 3 rework tolerance |
| TLV803E26DBZR | 2.63V open-drain reset IC with 1.8µA max ICC (vs 1.0µA), 140ms min reset timeout, and –40°C to +125°C rating | Better suited for under-hood automotive use; higher ICC reduces battery runtime in portable gear | Choose TLV803E26DBZR only when extended temperature range is mandatory and 0.8µA extra supply current is acceptable |
Compared with MAX6328XR26, the MAX6328UR26 offers identical supervision functionality in a larger, more manufacturable package, while the TLV803E26DBZR trades ultra-low power for wider temperature coverage - making MAX6328XR26 optimal for space- and energy-constrained industrial portables.
Availability
MAX6328XR26 is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart meter data loggers, and automotive body control units requiring stable component supply, long-lifecycle assurance, and RoHS-compliant sourcing.
Supply support for MAX6328XR26 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 industrial, computing, and communications applications.
The MAX6326/MAX6327/MAX6328 family targets ultra-low-power microprocessor supervision in space-constrained, battery-operated systems - delivering factory-trimmed voltage thresholds, open-drain/push-pull flexibility, and guaranteed operation down to 1.2V.
FAQ
What is the exact reset threshold voltage of MAX6328XR26 and how tightly is it specified?
The MAX6328XR26 has a nominal reset threshold of 2.630V, specified as 2.591V to 2.669V at +25°C (±1.5%), and 2.564V to 2.696V over the full –40°C to +85°C operating range (±2.5%). This factory-trimmed accuracy eliminates need for external calibration and ensures consistent brownout detection across temperature.
Does MAX6328XR26 require an external pull-up resistor on its RESET pin?
Yes, MAX6328XR26 features an open-drain RESET output and requires an external pull-up resistor to a valid voltage rail (e.g., VCC or another logic-compatible supply). Typical values range from 4.7kΩ to 10kΩ; the device sinks ≥1.6mA when RESET is asserted, ensuring solid low-level drive into µP reset inputs.
Can MAX6328XR26 operate reliably when VCC drops below 2.0V?
Yes, MAX6328XR26 is fully specified to maintain correct reset state down to VCC = 1.2V across –40°C to +85°C. Its internal circuitry remains functional and asserts RESET appropriately even during deep brownout - a key advantage over many competing supervisors that fail below 1.8V.
How does MAX6328XR26 handle fast transients on the VCC supply line?
MAX6328XR26 incorporates transient immunity circuitry that ignores negative-going VCC glitches shorter than ~200µs when the overdrive (VTH – VCC) is 200mV. This is documented in the "Maximum Transient Duration vs. Reset Threshold Overdrive" graph and eliminates need for external RC filters in most industrial and portable applications.
Is MAX6328XR26 pin-compatible with older Maxim reset ICs like MAX809?
Yes, MAX6328XR26 is pin-compatible with MAX809-series devices in the same SC70-3 package - sharing identical 1-GND / 2-RESET / 3-VCC pinout. However, MAX6328XR26 offers lower supply current (1µA vs ~10µA), tighter threshold accuracy, and improved transient rejection compared to legacy parts.
MAX6328XR26 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:
- 2.63V
- 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
MAX6328XR26 FAQ
1.How can I place an order for MAX6328XR26 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6328XR26 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 MAX6328XR26 reliable?
The price and inventory of MAX6328XR26 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6328XR26 is usually 5 days.
3.What payment methods are accepted for MAX6328XR26?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6328XR26 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6328XR26?
MAX6328XR26 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6328XR26 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 MAX6328XR26?
For technical support, including MAX6328XR26 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6328XR26 requirements.
6.How does Aetrix verify that MAX6328XR26 is sourced from the original manufacturer or authorized distributors?
All MAX6328XR26 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 MAX6328XR26 meets industry standards.
7.What is the process for return or replacement of MAX6328XR26?
All MAX6328XR26 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6328XR26, 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 MAX6328XR26 part is unused and in its original packaging.
Return procedure for MAX6328XR26:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6328XR26 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…
