My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6321HPUK46CY-T
- Part No.:
- MAX6321HPUK46CY-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6321HPUK46CY-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,073
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6321HPUK46CY-T from Maxim Integrated is a 5-pin SOT23 microprocessor supervisory circuit with active-low open-drain reset output, 4.63V factory-trimmed reset threshold, 140ms minimum reset timeout, and 1.6s typical watchdog timeout. It monitors VCC supply integrity and provides system-level reset assertion during power-up, brownout, or software hang conditions in embedded controllers and portable instrumentation.
For engineers reviewing the MAX6321HPUK46CY-T datasheet, MAX6321HPUK46CY-T pinout, MAX6321HPUK46CY-T application, or MAX6321HPUK46CY-T equivalent, key selection criteria include its guaranteed reset validity down to VCC = 1V, immunity to short negative VCC transients (<4µs at 100mV under threshold), open-drain output compatible with mixed-voltage reset buses up to 6V, and AEC-Q100 qualification for automotive-adjacent industrial use.
Technical Context
The MAX6321HPUK46CY-T implements a precision voltage monitor using a factory-laser-trimmed resistor divider to set VRST = 4.63V ±2.5% over –40°C to +125°C, with 3mV hysteresis. Its reset generator asserts RESET low when VCC falls below VRST and holds it active for ≥140ms after VCC rises above VRST.
It integrates a watchdog timer cleared by rising or falling edges on WDI (pulse width ≥50ns); timeout is factory-set to 1.6s (Y-grade). The open-drain RESET output requires an external pullup and sinks ≥1.2mA at VCC ≥2.7V while maintaining VOL ≤0.3V - enabling direct interface with 3.3V/5V µP reset inputs and multi-supply systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63V ±2.5% over –40°C to +125°C; ensures reliable brownout detection for 5V nominal rails |
| Reset Timeout | 140ms minimum; guarantees µP initialization completes before code execution resumes |
| Watchdog Timeout | 1.6s typical; balances fault detection speed against false triggers in deterministic firmware loops |
| Supply Current | 5–12µA at VCC = 3.6V; enables battery-powered operation for >10 years with coin-cell sources |
| RESET Output Type | Active-low open-drain; supports level-shifting, wired-OR reset buses, and pullup to any supply ≤6V |
| Operating Temp | –40°C to +125°C; qualified for under-hood automotive, industrial control, and harsh-environment deployment |
| VCC Range | 1.0V to 5.5V; maintains valid reset assertion even during deep brownout recovery |
Pinout & Package
MAX6321HPUK46CY-T is housed in a RoHS-compliant 5-pin SOT23 package (package code U5+2A, outline 21-0057) with 0.95mm pitch, 2.9mm × 1.6mm footprint, and thermal resistance θJA = 255.9°C/W on multilayer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low open-drain output | Sinks current only; requires external pullup to define logic-high level; compatible with 3.3V/5V/6V reset buses |
| 2 - GND | Ground reference | Primary return path for internal monitoring circuitry and output stage; must be low-impedance |
| 3 - MR | Active-low manual reset input | Pull low to force reset; internally pulled up to VCC via 52kΩ; rejects 100ns glitches |
| 4 - WDI | Watchdog input | Edge-triggered; clears watchdog timer on rising/falling transitions; disable by leaving floating |
| 5 - VCC | Supply input | Monitored voltage rail; reset asserted when VCC < 4.63V; operates down to 1.0V |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 4.63V threshold | Eliminates external resistor network; achieves ±2.5% accuracy across full temperature range without calibration |
| Open-drain RESET with 1.2mA sink capability | Enables shared reset bus with multiple voltage domains and avoids contention with µP bidirectional reset pins |
| Guaranteed operation down to VCC = 1V | Ensures clean reset assertion during ultra-low-power wake-up sequences and deep brownout recovery |
| AEC-Q100 qualified | Validated for automotive-adjacent applications including engine control modules, ADAS sensors, and infotainment ECUs |
| No external components required | Reduces BOM count and PCB area; integrates precision reference, timing elements, and ESD protection |
Applications
| Industrial PLC Controller | Portable Medical Monitor |
|---|---|
Use Scenario: Monitors 5V main supply in programmable logic controller rack with distributed I/O modules and real-time Ethernet backplane. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low reset to ARM Cortex-M7 MCU and FPGA configuration logic upon VCC dip or watchdog timeout. Use Value: Prevents corrupted state machine transitions during 120ms AC line sags; open-drain output allows shared reset with 3.3V I/O expander and 2.5V ADC. | Use Scenario: Powers-on and validates stable 3.3V rail for ECG signal processor and Bluetooth LE radio in handheld diagnostic device. IC Role / Device Role / Timing Role: Voltage supervisor initiating controlled boot sequence and detecting firmware lockup via WDI pulse supervision. Use Value: 140ms reset hold time ensures flash memory initialization completes; 1.6s watchdog interval matches longest sensor acquisition loop without false resets. |
| Automotive Body Control Module | Smart Energy Meter |
Use Scenario: Embedded in 12V-to-5V converted subsystem managing door locks, lighting, and CAN transceivers in passenger vehicle cabin. IC Role / Device Role / Timing Role: Reset generator interfacing with Infineon AURIX TC275 MCU; monitors post-regulator 5V rail for brownout and software hang. Use Value: AEC-Q100 qualification ensures reliability under thermal cycling; 4.63V threshold prevents spurious reset during cold-crank (6.5V min) and load-dump (40V transient) events. | Use Scenario: Secures metering SoC boot integrity in utility-grade electricity meter exposed to wide ambient temperature swings and conducted EMI. IC Role / Device Role / Timing Role: Power-on reset supervisor with manual reset button support and watchdog supervision of metrology firmware. Use Value: Immunity to 200ns VCC glitches eliminates false resets from switching regulator noise; 1V operating limit ensures reset remains valid during capacitor discharge fallback. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6321HPUK46CY+T | Lead-free variant (RoHS-compliant); identical electrical specs and timing | No functional difference; selected when lead-free assembly is mandated | Choose for new designs requiring Pb-free compliance; same footprint and thermal performance |
| TPS3808G33DBVR | 3.3V fixed reset threshold; 200ms reset timeout; no watchdog; SOT23-5 | Lacks watchdog supervision and manual reset; suited for simpler power-monitoring-only use cases | Select when only basic VCC monitoring is needed and 3.3V threshold aligns with system rail |
Compared with MAX6321HPUK46CY+T, the MAX6321HPUK46CY-T offers identical functionality in leaded packaging for legacy reflow processes; versus TPS3808G33DBVR, it provides critical watchdog and manual reset features essential for safety-critical firmware recovery but requires careful layout for open-drain pullup design.
Availability
MAX6321HPUK46CY-T is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, automotive body control modules, and smart energy meters requiring stable component supply with long lifecycle assurance.
Supply support for MAX6321HPUK46CY-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 MAX6316–MAX6322 family delivers highly integrated µP supervisory circuits with factory-trimmed thresholds, configurable reset/watchdog timing, and robust output stages - engineered specifically for reliable system boot, brownout recovery, and firmware fault containment in space-constrained embedded systems.
FAQ
What is the exact reset threshold voltage of MAX6321HPUK46CY-T and how stable is it over temperature?
The MAX6321HPUK46CY-T has a factory-trimmed nominal reset threshold of 4.63V, specified as 4.514V to 4.746V over –40°C to +125°C (±2.5%). Its temperature coefficient is 40ppm/°C, resulting in <±15mV drift across the full range - sufficient for stable operation on 5V rails with 5% tolerance.
Does MAX6321HPUK46CY-T require an external pullup resistor on the RESET pin?
Yes, MAX6321HPUK46CY-T features an open-drain RESET output and requires an external pullup resistor. A 10kΩ resistor to 3.3V or 5V is typical; value must ensure logic-high recognition while supplying all connected input leakage currents - verified in the Electrical Characteristics table under VOL and ILKG parameters.
Can MAX6321HPUK46CY-T be used in automotive applications?
Yes, MAX6321HPUK46CY-T is AEC-Q100 qualified and rated for –40°C to +125°C operation. Its 4.63V threshold, 140ms reset timeout, and immunity to short VCC transients make it suitable for body control modules, infotainment power sequencing, and sensor nodes where robust reset behavior is mandatory.
What is the watchdog timeout period of MAX6321HPUK46CY-T and how is it triggered?
The MAX6321HPUK46CY-T has a typical watchdog timeout of 1.6s (Y-grade). It is triggered when the WDI pin remains static (high or low) for the full timeout duration. The timer clears on any edge (rising or falling) and also resets automatically during active RESET assertion.
How does the manual reset (MR) input function on MAX6321HPUK46CY-T?
The MR input on MAX6321HPUK46CY-T is active-low with internal 52kΩ pullup to VCC. Pulling MR low forces RESET assertion for the full 140ms timeout period after MR returns high. It rejects 100ns noise pulses and supports direct connection to momentary switches or logic outputs without debouncing.
MAX6321HPUK46CY-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.63V
- Output:
- Open Drain, Push-Pull
- Reset:
- Active High/Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6321HPUK46CY-T FAQ
1.How can I place an order for MAX6321HPUK46CY-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6321HPUK46CY-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 MAX6321HPUK46CY-T reliable?
The price and inventory of MAX6321HPUK46CY-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6321HPUK46CY-T is usually 5 days.
3.What payment methods are accepted for MAX6321HPUK46CY-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6321HPUK46CY-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6321HPUK46CY-T?
MAX6321HPUK46CY-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6321HPUK46CY-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 MAX6321HPUK46CY-T?
For technical support, including MAX6321HPUK46CY-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6321HPUK46CY-T requirements.
6.How does Aetrix verify that MAX6321HPUK46CY-T is sourced from the original manufacturer or authorized distributors?
All MAX6321HPUK46CY-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 MAX6321HPUK46CY-T meets industry standards.
7.What is the process for return or replacement of MAX6321HPUK46CY-T?
All MAX6321HPUK46CY-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6321HPUK46CY-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 MAX6321HPUK46CY-T part is unused and in its original packaging.
Return procedure for MAX6321HPUK46CY-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6321HPUK46CY-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…
