My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6426UK16+T
- Part No.:
- MAX6426UK16+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6426UK16+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,031
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6426UK16+T from Analog Devices is a low-power microprocessor supervisor IC with open-drain active-low reset output, 1.575V nominal reset threshold (±2.5% over temperature), 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 requiring precise brownout protection.
For engineers reviewing the MAX6426UK16+T datasheet, MAX6426UK16+T pinout, MAX6426UK16+T application, or MAX6426UK16+T equivalent, key selection criteria include its SOT23-5 open-drain reset architecture, 1.6µA typical quiescent current, -40°C to +125°C operating range, and compatibility with multi-rail logic interfaces via external pullup.
Technical Context
The MAX6426UK16+T implements a precision voltage detector with laser-trimmed internal resistors to set its 1.575V reset threshold, coupled with a 240nA constant-current ramp source charging an external capacitor on the SRT pin. Reset assertion occurs when VCC falls below threshold; deassertion requires both VCC rise above threshold and SRT capacitor voltage ramping to 0.65V.
This architecture delivers immunity to short VCC transients (e.g., ≤50µs for 100mV overdrive) and ensures valid reset signaling across 1.0V–5.5V supply range. Its open-drain RESET output supports wired-OR configurations and logic-level translation up to 5.5V using an external pullup resistor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 1.575V nominal (1.536V–1.614V at +25°C; ±2.5% over -40°C to +125°C) |
| Quiescent Current | 1.6µA typical at VCC ≤ 2.0V - enables >10-year battery life in coin-cell applications |
| Reset Timeout Range | 275µs (CSRT = 0) to 5.75ms (CSRT = 1500pF) - adjustable via external capacitor | VCC Operating Range | 1.0V to 5.5V - guarantees reset validity during deep brownout down to 1V |
| Output Type | Active-low open-drain - supports wired-OR reset networks and multi-supply logic interfacing |
| Package | 5-pin SOT23-5 - 2.9mm × 1.6mm footprint compatible with high-density PCB layouts |
| Temperature Range | -40°C to +125°C - qualified for automotive and industrial under-hood environments |
Pinout & Package
The MAX6426UK16+T is housed in a 5-pin SOT23-5 package with gull-wing leads, 0.95mm pitch, and exposed pad option not specified. Pin 1 is SRT (Set Reset Timeout), Pin 2 is GND, Pin 3 is N.C. (not internally connected), Pin 4 is VCC, and Pin 5 is RESET (open-drain active-low).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SRT | Capacitor-adjustable timeout input | Connects to external timing capacitor; 240nA ramp current charges CSRT to 0.65V to terminate reset |
| 2 - GND | Ground reference | Primary return path for internal circuitry and SRT current sink |
| 3 - N.C. | No internal connection | May be left floating or tied to GND; no electrical function or signal integrity impact |
| 4 - VCC | Supply and threshold monitor input | Monitors system rail; reset asserts when VCC drops below 1.575V; valid down to 1.0V |
| 5 - RESET | Open-drain active-low reset output | Sinks current when asserted; requires external pullup (10kΩ–100kΩ) to target logic rail (0–5.5V) |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed reset threshold | 1.575V with ±1.5% accuracy at +25°C and ±2.5% over full temperature range - eliminates external resistor calibration |
| Capacitor-programmable timeout | 275µs to 5.75ms range via 0–1500pF SRT capacitor - matches µP reset timing requirements without firmware changes |
| Open-drain RESET with 5.5V tolerance | Allows pullup to any rail up to 5.5V - enables reset assertion across mixed-voltage systems (e.g., 1.8V µP + 3.3V I/O) |
| Ultra-low ICC of 1.6µA | Reduces standby power by >50% vs. comparable supervisors - critical for energy-harvesting and long-life battery designs |
| Immunity to VCC transients | Rejects ≤50µs negative glitches 100mV below threshold - prevents spurious resets in noisy automotive/industrial environments |
Applications
| Battery-Powered Portable Instrumentation | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Handheld multimeter with coin-cell battery and LCD display operating across 2.0V–3.3V supply range. IC Role / Device Role / Timing Role: Voltage supervisor asserting active-low reset to MSP430 MCU during brownout, with timeout set to 4.375ms to exceed processor's minimum reset pulse width. Use Value: Prevents code corruption during battery depletion; 1.6µA ICC extends shelf life beyond 10 years. | Use Scenario: BCM microcontroller powered from vehicle battery (9V–16V) with LDO-regulated 3.3V rail subject to load-dump transients. IC Role / Device Role / Timing Role: Monitors 3.3V LDO output; open-drain RESET pulled to 5V domain to interface with CAN transceiver reset input. Use Value: Immunity to 50µs/100mV VCC glitches avoids false resets during alternator switching events. |
| Medical Wearable Sensor Node | Industrial PLC I/O Module |
Use Scenario: ECG patch with rechargeable Li-ion cell and ultra-low-power ARM Cortex-M0+ MCU. IC Role / Device Role / Timing Role: Supervises 1.8V core rail; SRT capacitor set for 275µs timeout to meet fast-boot requirements while maintaining 1.575V threshold margin. Use Value: Guaranteed reset validity down to VCC = 1.0V ensures safe shutdown before deep discharge damages battery. | Use Scenario: DIN-rail mounted I/O module with isolated 24V-to-3.3V DC-DC converter powering ARM-based controller. IC Role / Device Role / Timing Role: Detects 3.3V rail collapse during field-wiring faults; RESET wired-OR'd with watchdog timer output to force hard reset. Use Value: Open-drain architecture enables direct connection to other supervisory outputs without level-shifting components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor reset supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCP302LSN16T1G | Fixed 1.6V threshold, 200ms min timeout, push-pull output, 1.5µA ICC | Lacks capacitor-adjustable timeout and open-drain flexibility; requires PCB redesign for pullup removal | Select when fixed long timeout suffices and push-pull simplifies layout |
| PST9216TR | 1.6V threshold, 200ms timeout, open-drain output, 2.0µA ICC, SOT23-5 | Timeout not adjustable; higher ICC reduces battery life; same pinout but different SRT functionality | Choose for drop-in replacement where timeout adjustability is unnecessary |
Compared with NCP302LSN16T1G and PST9216TR, the MAX6426UK16+T uniquely combines capacitor-adjustable reset delay, ultra-low 1.6µA ICC, and open-drain output in SOT23-5 - enabling design flexibility for battery-critical and multi-rail applications where timing and interface adaptability are essential.
Availability
MAX6426UK16+T is available at Aetrix Electronics and suitable for battery-powered portable instrumentation, automotive body control modules, medical wearable sensor nodes, and industrial PLC I/O modules requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MAX6426UK16+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.
The MAX6426UK16+T belongs to the MAX6340/MAX6421–MAX6426 family of low-power microprocessor supervisors designed specifically for reliable power-on reset, brownout detection, and system recovery in space-constrained, energy-sensitive embedded systems.
FAQ
What is the exact reset threshold voltage of the MAX6426UK16+T and how does it vary with temperature?
The MAX6426UK16+T has a nominal reset threshold of 1.575V, with a tolerance of ±1.5% at +25°C and ±2.5% over the full operating range of -40°C to +125°C. This corresponds to a minimum of 1.536V and maximum of 1.614V at room temperature, and 1.536V to 1.614V at extremes - verified in the Electrical Characteristics table and Typical Operating Characteristics plots. The MAX6426UK16+T uses laser-trimmed resistors to achieve this precision.
Can the MAX6426UK16+T operate reliably when the supply voltage drops below 1.6V?
Yes, the MAX6426UK16+T guarantees valid reset output functionality down to VCC = 1.0V, as explicitly stated in the datasheet's "Guaranteed Reset Valid to VCC = 1V" feature and confirmed in Absolute Maximum Ratings. Below 1.0V, reset assertion remains functional but output drive strength declines. This makes the MAX6426UK16+T suitable for deep-brownout detection in lithium primary or partially discharged Li-ion systems.
How do I calculate the external capacitor value needed for a specific reset timeout period with the MAX6426UK16+T?
Use the formula CSRT = (tRP − 275µs) / 2.735 × 10⁶, where tRP is the desired timeout in seconds and CSRT is in farads. For example, a 4.375ms timeout requires CSRT = (0.004375 − 0.000275) / 2.735e6 = 1500pF. The MAX6426UK16+T datasheet specifies ceramic capacitors with leakage <10nA for stability, and the SRT pin must be routed with minimal stray capacitance to avoid timing errors.
Is the MAX6426UK16+T pin-compatible with other devices in the same family or from competing manufacturers?
Yes, the MAX6426UK16+T is pin-compatible with PST92XX series devices per the datasheet's "MAX6426 Pin Compatible with PST92XX" statement. It shares the same 5-pin SOT23-5 pinout (SRT-GND-N.C.-VCC-RESET) with MAX6340, MAX6425, and MAX6424 variants, but differs from 4-pin SC70/SOT143 versions like MAX6421/6422/6423. No pin-to-pin compatibility exists with NCP302 or MC33464 due to differing pin counts and functions.
What is the maximum allowable voltage on the RESET pin of the MAX6426UK16+T when used with an external pullup?
The RESET pin of the MAX6426UK16+T is rated for voltages up to +6.0V, as defined in the Absolute Maximum Ratings table. When configured as open-drain, it safely interfaces with pullup rails from 0V to 5.5V - supporting logic compatibility with 1.8V, 2.5V, 3.3V, and 5V systems. Exceeding 6.0V risks permanent damage; the MAX6426UK16+T does not include internal clamping diodes to VCC.
MAX6426UK16+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:
- 1.575V
- 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
MAX6426UK16+T FAQ
1.How can I place an order for MAX6426UK16+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6426UK16+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 MAX6426UK16+T reliable?
The price and inventory of MAX6426UK16+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6426UK16+T is usually 5 days.
3.What payment methods are accepted for MAX6426UK16+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6426UK16+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6426UK16+T?
MAX6426UK16+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6426UK16+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 MAX6426UK16+T?
For technical support, including MAX6426UK16+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6426UK16+T requirements.
6.How does Aetrix verify that MAX6426UK16+T is sourced from the original manufacturer or authorized distributors?
All MAX6426UK16+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 MAX6426UK16+T meets industry standards.
7.What is the process for return or replacement of MAX6426UK16+T?
All MAX6426UK16+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6426UK16+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 MAX6426UK16+T part is unused and in its original packaging.
Return procedure for MAX6426UK16+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6426UK16+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…
