My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6340UK22+T
- Part No.:
- MAX6340UK22+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6340UK22+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,166
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6340UK22+T from Analog Devices is a low-power microprocessor supervisor IC with open-drain active-low reset output, 2.188V ±2.5% factory-trimmed reset threshold, capacitor-adjustable reset timeout (275µs to 5.75ms), and guaranteed operation down to VCC = 1V. It monitors supply voltage in battery-powered embedded controllers and portable equipment to prevent erroneous code execution during brownout.
For engineers reviewing the MAX6340UK22+T datasheet, MAX6340UK22+T pinout, MAX6340UK22+T application, or MAX6340UK22+T equivalent, key selection factors include its SOT23-5 open-drain reset architecture, 1.6µA typical quiescent current, -40°C to +125°C operating range, and compatibility with wired-OR reset schemes across mixed-voltage systems.
Technical Context
The MAX6340UK22+T implements a precision voltage-detection circuit using laser-trimmed resistors to set its 2.188V reset threshold with ±2.5% accuracy over temperature. Its reset assertion logic is triggered when VCC falls below this threshold and remains asserted for a user-defined timeout period determined by an external capacitor on the SRT pin.
A 240nA internal ramp current charges the SRT capacitor to a 0.65V internal reference; reset deassertion occurs once that voltage is reached. The open-drain RESET output requires an external pullup and supports logic-level interfacing up to 5.5V, enabling use with µPs operating at different supply voltages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.188V ±2.5% (factory-trimmed; ensures reliable detection of 2.2V nominal supply brownout) |
| Quiescent Current | 1.6µA typ at VCC ≤ 2.0V (enables multi-year battery life in always-on monitoring) |
| Reset Timeout Range | 275µs to 5.75ms (set via 0–1500pF capacitor on SRT pin; covers most µP reset timing requirements) |
| Operating Voltage Range | 1.0V to 5.5V (guarantees valid reset output even during deep brownout down to 1V) |
| Output Type | Active-low open-drain (supports wired-OR configuration and level-shifting with external pullup) |
| Temperature Range | -40°C to +125°C (qualified for automotive and industrial under-hood applications) |
| VCC to Reset Delay | 80µs (ensures fast response to supply collapse without false triggering on noise) |
Pinout & Package
MAX6340UK22+T is housed in a 5-pin SOT23-5 package (package code U5+2), RoHS-compliant, tape-and-reel format. Pin 1 is VCC, Pin 2 is GND, Pin 3 is SRT (capacitor-adjustable timeout input), Pin 4 is N.C. (not internally connected), and Pin 5 is RESET (open-drain active-low output).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCC | Supply voltage and reset threshold monitor input | Primary power rail connection; voltage applied here determines reset trigger point and powers internal detection circuitry |
| 2 - GND | Ground reference | Common return path for all internal circuits and SRT capacitor discharge path |
| 3 - SRT | Set Reset Timeout input | Connects to external capacitor; 240nA ramp current charges it to 0.65V to define reset timeout duration |
| 4 - N.C. | Not internally connected | No internal bond wire; may be left floating or tied to GND per layout best practice; no electrical function |
| 5 - RESET | Open-drain active-low reset output | Drives low during reset condition; requires external pullup resistor to define high-state voltage level |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-adjustable reset timeout | Enables precise timing alignment with diverse µP reset requirements without firmware changes or BOM variants |
| Guaranteed reset validity to VCC = 1V | Ensures deterministic system behavior during deep undervoltage conditions where many supervisors fail silently |
| Immunity to short VCC transients | Rejects glitches ≤50µs at 100mV overdrive, preventing spurious resets in noisy power environments |
| Open-drain output with 5.5V tolerance | Allows direct interface to µPs or FPGAs operating at higher or lower logic voltages than VCC |
| Low 1.6µA quiescent current | Minimizes battery drain in always-on monitoring applications such as medical wearables and remote sensors |
Applications
| Battery-Powered Portable Equipment | Automotive Body Control Modules |
|---|---|
Use Scenario: Power management in handheld medical devices with coin-cell batteries. IC Role / Device Role / Timing Role: Monitors main 3.3V rail and asserts open-drain RESET to halt MCU during brownout until stable voltage returns. Use Value: Prevents corrupted memory writes and undefined state transitions during battery depletion, extending usable runtime and ensuring safe shutdown. |
Use Scenario: Supervision of 5V domain powering door-lock actuators and interior lighting controllers. IC Role / Device Role / Timing Role: Detects 5V rail collapse due to load dump or alternator failure and holds system in reset for ≥4ms. Use Value: Eliminates erratic actuator movement and prevents EEPROM corruption during transient supply faults common in 12V automotive systems. |
| Industrial Embedded Controllers | Medical Diagnostic Instruments |
Use Scenario: Reliable startup sequencing in DIN-rail mounted PLC I/O modules. IC Role / Device Role / Timing Role: Provides configurable reset delay after 24V-to-3.3V DC/DC stabilization, ensuring FPGA configuration completes before release. Use Value: Avoids configuration lockup and enables deterministic boot across wide temperature (-40°C to +125°C) and input voltage ranges. |
Use Scenario: Critical power supervision in portable ultrasound units with dual-battery backup. IC Role / Device Role / Timing Role: Monitors both primary and backup 3.7V Li-ion rails and generates synchronized reset pulses to ARM Cortex-M7 core. Use Value: Guarantees clean restart upon battery switchover and meets IEC 62304 Class C software safety requirements for diagnostic integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LP3470ASX-2.2/TR | Pin-compatible but uses fixed 2.2V threshold with no capacitor-adjustable timeout; 2.5µA ICC max | Lacks timeout flexibility; suitable only where fixed 200ms reset is acceptable | Select LP3470ASX-2.2/TR only if design requires zero external components and fixed timing. |
| NCP302LSN22T1G | Fixed 2.2V threshold, push-pull output, 1.8µA ICC typ, same SOT23-5 package | Cannot support wired-OR reset; incompatible with multi-supply logic interfaces | Choose NCP302LSN22T1G when push-pull drive is needed and level-shifting is unnecessary. |
Compared with MAX6340UK22+T, LP3470ASX-2.2/TR sacrifices timeout adjustability for component count reduction, while NCP302LSN22T1G trades open-drain flexibility for stronger drive strength-neither offers the same combination of programmable timing and voltage-agnostic reset signaling.
Availability
MAX6340UK22+T is available at Aetrix Electronics and suitable for battery-powered portable equipment, automotive body control modules, and industrial embedded controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6340UK22+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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The MAX6340 series belongs to Analog Devices' precision voltage supervisor product line, designed specifically for ultra-low-power, high-reliability reset monitoring in space-constrained and thermally demanding applications.
FAQ
What is the exact reset threshold voltage of the MAX6340UK22+T?
The MAX6340UK22+T features a factory-laser-trimmed reset threshold of 2.188V with ±1.5% accuracy at +25°C and ±2.5% over the full -40°C to +125°C operating range. This value corresponds to the "22" suffix in the part number and is confirmed in Table 1 of the official datasheet.
Does the MAX6340UK22+T require an external pullup resistor on the RESET pin?
Yes, the MAX6340UK22+T has an open-drain RESET output and requires an external pullup resistor. A value between 10kΩ and 100kΩ is recommended, connected to any supply from 0V to 5.5V, to ensure proper logic-high assertion and accommodate mixed-voltage system interfacing.
Can the MAX6340UK22+T operate reliably below 1.6V supply voltage?
Yes-the MAX6340UK22+T guarantees valid reset output functionality down to VCC = 1.0V, as specified in the Absolute Maximum Ratings and Electrical Characteristics tables. This allows robust brownout detection even during deep discharge of single-cell Li-ion or alkaline batteries.
How is the reset timeout period calculated for the MAX6340UK22+T?
The reset timeout period tRP for the MAX6340UK22+T is calculated as tRP = (2.73 × 10⁶) × CSRT + 275µs, where tRP is in seconds and CSRT is in farads. For example, a 1500pF capacitor yields a typical timeout of 4.375ms, verified in the Electrical Characteristics table under tRP conditions.
Is the MAX6340UK22+T qualified for automotive applications?
The MAX6340UK22+T is rated for -40°C to +125°C operation and shares the same process and qualification baseline as the AEC-Q100-qualified MAX6340UK31/V+T variant. While not individually certified, its specifications and construction meet core automotive reliability requirements for non-safety-critical body electronics.
MAX6340UK22+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:
- 2.188V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- Adjustable/Selectable
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6340UK22+T FAQ
1.How can I place an order for MAX6340UK22+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6340UK22+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 MAX6340UK22+T reliable?
The price and inventory of MAX6340UK22+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6340UK22+T is usually 5 days.
3.What payment methods are accepted for MAX6340UK22+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6340UK22+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6340UK22+T?
MAX6340UK22+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6340UK22+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 MAX6340UK22+T?
For technical support, including MAX6340UK22+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6340UK22+T requirements.
6.How does Aetrix verify that MAX6340UK22+T is sourced from the original manufacturer or authorized distributors?
All MAX6340UK22+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 MAX6340UK22+T meets industry standards.
7.What is the process for return or replacement of MAX6340UK22+T?
All MAX6340UK22+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6340UK22+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 MAX6340UK22+T part is unused and in its original packaging.
Return procedure for MAX6340UK22+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6340UK22+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…
