My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6450UT23L+T
- Part No.:
- MAX6450UT23L+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6450UT23L+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,836
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6450UT23L+T from Maxim Integrated is a dual-supply microprocessor supervisor IC with one fixed-threshold (2.313V) and one adjustable-threshold (0.63V reference) voltage monitor, two extended-setup manual reset inputs (MR1/MR2), open-drain active-low RESET output, and 6.72s minimum manual reset setup period. It operates from 1.0V to 5.5V supply and delivers guaranteed reset assertion down to VCC = 1.0V for reliable power-up/brownout detection in set-top boxes and consumer electronics.
For engineers reviewing the MAX6450UT23L+T datasheet, MAX6450UT23L+T pinout, MAX6450UT23L+T application, or MAX6450UT23L+T equivalent, key selection considerations include its dual-monitor architecture (VCC + RSTIN), 6.72s extended MR1/MR2 setup time to prevent nuisance resets, 210ms typical reset timeout, 6µA quiescent current, and SOT23-6 package compatibility with space-constrained embedded designs.
Technical Context
The MAX6450UT23L+T integrates two independent reset comparators: one monitors VCC against a factory-trimmed 2.313V threshold (±1.5% over temperature), while the second monitors an external voltage via RSTIN using a precision 0.630V ±0.020V internal reference. Both comparators feed into a shared reset timer that asserts RESET low for 140ms minimum after any monitored supply falls below threshold or after MR1 and MR2 are held low simultaneously for ≥6.72s.
Its dual manual reset architecture requires coordinated low assertion of both MR1 and MR2 for the full setup period - unlike immediate-reset variants - and includes 210ms internal debouncing on MR2 transitions to suppress contact bounce during smart-card detect applications. The open-drain RESET output supports level-shifting up to 6V and sinks ≥3.2mA at VCC ≥4.25V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 2.313V ±1.5% - ensures reliable brownout detection for 2.5V systems with margin |
| RSTIN Reference Voltage | 0.630V ±0.020V - enables precise monitoring of voltages as low as 0.63V via external resistor divider |
| Manual Reset Setup Period | 6.72s - prevents accidental system reset from brief front-panel button presses |
| Reset Timeout Period | 140ms min / 210ms typ - guarantees sufficient processor reset hold time across temperature |
| Supply Current | 6µA at 3.6V - enables always-on supervision in battery-backed or ultra-low-power systems |
| Operating Voltage Range | 1.0V to 5.5V - supports valid RESET assertion even during deep brownout conditions |
| RESET Output Type | Open-drain - allows flexible pullup to any logic rail up to 6V for mixed-voltage system interfacing |
Pinout & Package
Package: 6-pin SOT23 (U6+1, 21-0058 footprint), rated for -40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Ground reference | Primary return path for all internal circuitry and comparator references |
| 2 VCC | Power supply input | Supplies bias and powers VCC monitor; also serves as pullup source for MR1/MR2 internal 50kΩ resistors |
| 3 MR1 | Extended manual reset input | Active-low input requiring ≥6.72s low assertion; internally pulled up to VCC |
| 4 MR2 | Extended manual reset input | Active-low input requiring simultaneous ≥6.72s low assertion with MR1; internally pulled up to VCC |
| 5 RSTIN | Adjustable voltage monitor input | High-impedance node connected to external resistor divider to set custom reset threshold |
| 6 RESET | Active-low open-drain output | Drives microprocessor reset pin; requires external pullup resistor to target logic rail |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage monitoring | Simultaneously supervises primary supply (VCC @ 2.313V) and auxiliary rail (via RSTIN @ 0.63V ref) without external components |
| Extended dual manual reset setup | Requires coordinated 6.72s low assertion on both MR1 and MR2 - eliminates false resets from single-button presses |
| Guaranteed reset down to VCC = 1.0V | Ensures valid RESET assertion even during severe brownout, preventing undefined µP behavior before power collapse |
| Low 6µA quiescent current | Enables permanent connection to battery rails in standby mode without significant drain |
| 210ms MR2 debouncing | Suppresses contact bounce on MR2 during smart-card insertion/removal, eliminating spurious reset pulses |
Applications
| Set-Top Box Power Management | DVD Player Brownout Recovery |
|---|---|
Use Scenario: Monitors main 3.3V supply and FPGA core voltage (1.2V) during AC line sags or hot-swap events. IC Role / Device Role / Timing Role: Dual-threshold supervisor asserting RESET when either rail drops below spec, with 210ms timeout ensuring full SoC reset. Use Value: Prevents corrupted firmware execution by guaranteeing clean restart after partial power loss. | Use Scenario: Detects 5V supply dip during laser sled motor startup and triggers controlled shutdown sequence. IC Role / Device Role / Timing Role: VCC monitor (2.313V threshold) combined with RSTIN monitoring 5V rail via resistor divider. Use Value: Eliminates video artifacts and disc read errors caused by undervoltage-induced timing violations. |
| Smart Card Reader Interface | Cable Modem System Reset |
Use Scenario: Detects card insertion (MR2 high transition) and user-initiated hard reset (MR1+MR2 held low 6.72s). IC Role / Device Role / Timing Role: MR2 provides immediate one-shot pulse on card detect; MR1+MR2 enable secure long-press reset. Use Value: Enables dual-function front panel - instant card presence signaling and tamper-resistant system recovery. | Use Scenario: Coordinates reset of baseband processor and RF transceiver during DOCSIS firmware update failures. IC Role / Device Role / Timing Role: Supervises 1.8V baseband supply and 3.3V RF supply independently; RESET output drives both devices' reset pins. Use Value: Ensures atomic reset of coupled subsystems, avoiding protocol lockup during field upgrades. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6449UT23L+T | Same 6-pin SOT23 package and dual MR1/MR2 architecture, but fixed VCC threshold is 2.188V instead of 2.313V | Better suited for 2.2V systems; less margin for 2.5V rails | Select when monitoring lower nominal supplies where 2.188V threshold aligns with design voltage tolerances |
| MAX6452UT23L+T | Identical pinout and electrical specs, but adds immediate-reset MR2 functionality (rising-edge triggered) alongside extended MR1 | Supports both secure long-press reset and instant card-detect pulse in same device | Choose when system requires both immediate and extended reset modes without external logic |
Compared with MAX6449UT23L+T, the MAX6450UT23L+T provides higher VCC threshold margin for 2.5V systems; compared with MAX6452UT23L+T, it omits immediate MR2 triggering - simplifying reset logic where only coordinated dual-press security is needed.
Availability
MAX6450UT23L+T is available at Aetrix Electronics and suitable for set-top boxes, DVD players, cable modems, and industrial equipment requiring stable component supply with guaranteed -40°C to +85°C operation and lead(Pb)-free packaging.
Supply support for MAX6450UT23L+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 and mixed-signal ICs for power, sensing, and interface applications in industrial, automotive, and consumer markets.
The MAX6443–MAX6452 family delivers robust microprocessor supervision with extended manual reset immunity, targeting consumer electronics and industrial systems where front-panel reliability and brownout resilience are critical.
FAQ
What is the exact VCC reset threshold voltage for MAX6450UT23L+T?
The MAX6450UT23L+T has a factory-trimmed VCC reset threshold of 2.313V, with ±1.5% tolerance over the full -40°C to +85°C temperature range. This value is confirmed in Table 1 of the datasheet under suffix "23" and applies specifically to the MAX6450UT23L+T variant. The threshold exhibits 60ppm/°C tempco and includes 2×VTH hysteresis for noise immunity.
How does the dual manual reset function work on MAX6450UT23L+T?
The MAX6450UT23L+T requires both MR1 and MR2 pins to be held low simultaneously for the full 6.72s extended setup period before asserting RESET. Unlike variants with immediate MR2, this device treats MR2 identically to MR1 - no rising-edge triggering. The internal timing circuit debounces transitions and enforces strict coordination to prevent accidental resets from single-button presses.
Can MAX6450UT23L+T monitor a 1.2V supply rail?
Yes, the MAX6450UT23L+T can monitor a 1.2V rail using its RSTIN input. With the internal 0.630V reference, a resistor divider (e.g., R1 = 220kΩ, R2 = 250kΩ) sets the trip point to 1.2V per the formula VMON-TH = 0.63 × (R1 + R2)/R2. The high-impedance RSTIN input draws only ±25nA, minimizing divider current and preserving accuracy.
What is the minimum required pullup resistor for the open-drain RESET output of MAX6450UT23L+T?
The datasheet specifies a minimum 20kΩ pullup resistor to VCC for the open-drain RESET output of MAX6450UT23L+T. This value ensures proper VOL ≤ 0.4V when sinking 3.2mA at VCC ≥ 4.25V. For level-shifting to higher rails (e.g., 5V), use a pullup to that rail - but note RESET sink capability degrades as VCC falls below 1.0V.
Is MAX6450UT23L+T qualified for automotive applications?
No, the MAX6450UT23L+T is not AEC-Q100 qualified. Only the MAX6444US16K/V+T variant in the family carries automotive qualification. The MAX6450UT23L+T is specified for industrial temperature range (-40°C to +85°C) and intended for consumer and industrial equipment, not automotive ECUs or infotainment systems requiring AEC certification.
MAX6450UT23L+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 2.313V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX6450UT23L+T FAQ
1.How can I place an order for MAX6450UT23L+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6450UT23L+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 MAX6450UT23L+T reliable?
The price and inventory of MAX6450UT23L+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6450UT23L+T is usually 5 days.
3.What payment methods are accepted for MAX6450UT23L+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6450UT23L+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6450UT23L+T?
MAX6450UT23L+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6450UT23L+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 MAX6450UT23L+T?
For technical support, including MAX6450UT23L+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6450UT23L+T requirements.
6.How does Aetrix verify that MAX6450UT23L+T is sourced from the original manufacturer or authorized distributors?
All MAX6450UT23L+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 MAX6450UT23L+T meets industry standards.
7.What is the process for return or replacement of MAX6450UT23L+T?
All MAX6450UT23L+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6450UT23L+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 MAX6450UT23L+T part is unused and in its original packaging.
Return procedure for MAX6450UT23L+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6450UT23L+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…
