My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6308UK00D3+T
- Part No.:
- MAX6308UK00D3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6308UK00D3+T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,895
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6308UK00D3+T from Maxim Integrated is a 5-pin SOT23 programmable supervisory IC that monitors VCC and two adjustable undervoltage inputs (RST IN1/RST IN2), asserts an active-low push/pull RESET output when any monitored supply falls below its threshold, features factory-set 0V reset threshold (VTH = 0.0V nominal), and provides 140ms minimum reset timeout - used in portable computers and multivoltage embedded systems for reliable power-on/brownout reset generation.
For engineers reviewing the MAX6308UK00D3+T datasheet, MAX6308UK00D3+T pinout, MAX6308UK00D3+T application, or MAX6308UK00D3+T equivalent, key selection criteria include its dual adjustable reset inputs, guaranteed RESET validity down to VCC = 1V, immunity to fast VCC transients, and compatibility with 3.3V/5V system rails requiring stable reset assertion during power sequencing.
Technical Context
The MAX6308UK00D3+T implements a dual-input undervoltage monitoring architecture with internal 1.23V reference, comparing RST IN1 and RST IN2 against VRSTH = 1.23V ±0.03V using precision comparators with ±25nA input leakage. Its VCC monitor operates across 1.0V–5.5V, switching from undervoltage lockout to normal operation between 1.5V < VCC < 2.5V.
It integrates a temperature-stable reset timeout timer (tRP = 140ms min, ±20% over -0°C to +70°C), push/pull RESET output capable of sourcing 0.8×VCC at 150µA and sinking 1.2mA at VCC > 2.5V, and no external components required for basic operation - all within a 5-pin SOT23 package with lead-free +T marking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.0V to 5.5V - supports operation from brownout recovery through full rail, enabling use in low-voltage battery-powered systems. |
| Reset Threshold (VTH) | 0.0V nominal (UK00) - factory-trimmed to detect VCC = 0V condition; actual threshold defined by external resistor dividers on RST IN1/RST IN2. |
| Reset Timeout (tRP) | 140ms minimum (D3) - ensures µP reset pulse meets typical boot firmware hold-time requirements without external timing components. |
| Supply Current (ICC) | 8µA typical at +25°C - enables multi-year battery life in portable equipment with continuous supervision. |
| RESET Output Type | Active-low push/pull - drives logic-low directly without pull-up resistor, compatible with bidirectional µP reset pins and noise-sensitive interfaces. |
| Input Leakage (IRST IN) | ±25nA max - allows megohm-level external divider resistors, minimizing power loss and board space in high-impedance sensing circuits. |
| Transient Immunity | Immune to VCC transients < 100µs at 50mV overdrive - prevents false resets during switching noise or load-dump events. |
Pinout & Package
MAX6308UK00D3+T is housed in a RoHS-compliant, lead-free 5-pin SOT23 package (outline U5+1, land pattern 90-0174), measuring 2.9mm × 1.6mm × 1.1mm, suitable for high-density PCB layouts in portable and space-constrained applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push/pull reset output | Asserts logic-low during reset; sinks 1.2mA / sources 0.8×VCC - eliminates need for external pull-up and supports direct µP interface. |
| 2 - GND | System ground reference | Common return path for all internal comparators and output driver; must be low-impedance connection to avoid reset timing errors. |
| 3 - RST IN1 | Adjustable undervoltage reset input #1 | Compares external voltage divider output to 1.23V reference; sets custom reset threshold for first monitored rail (e.g., 3.3V I/O). |
| 4 - RST IN2 | Adjustable undervoltage reset input #2 | Independent comparator input for second rail (e.g., 1.8V core); supports simultaneous dual-rail supervision with single IC. |
| 5 - VCC | Main supply input and VCC monitor reference | Power source and primary supervision rail; device remains functional down to 1.0V and guarantees RESET validity to VCC = 1V. |
Key Features
| Feature | Design Value |
|---|---|
| Dual adjustable reset inputs | RST IN1 and RST IN2 each interface to independent 1.23V comparators, enabling precise, rail-specific undervoltage detection for multivoltage systems. |
| Factory-programmed 0V VCC threshold | UK00 coding specifies nominal VTH = 0.0V - simplifies design for systems where VCC monitoring is disabled or replaced by external dividers. |
| 140ms minimum reset timeout | D3 suffix guarantees tRP ≥ 140ms - satisfies JEDEC JESD72 and common BIOS/UEFI reset hold-time requirements without capacitor tuning. |
| Guaranteed RESET down to VCC = 1V | Push/pull output maintains valid logic levels even during deep brownout - ensures deterministic µP state initialization before power collapse. |
| No external timing components | Internal RC timer eliminates discrete capacitors/resistors - reduces BOM count, improves production yield, and avoids temperature drift in timeout setting. |
Applications
| Portable Computers | Embedded Control Systems |
|---|---|
Use Scenario: Power sequencing in clamshell laptops with separate 3.3V I/O, 1.8V core, and 5V USB rails. IC Role / Device Role / Timing Role: Supervises all three rails via RST IN1 (3.3V divider), RST IN2 (1.8V divider), and VCC (5V), asserting synchronized RESET until all stabilize. Use Value: Prevents firmware corruption during lid-open/closed transitions by ensuring µP only exits reset after all supplies meet regulation. |
Use Scenario: Industrial PLC module with isolated 24V field bus and 3.3V logic supply. IC Role / Device Role / Timing Role: Monitors 24V bus via RST IN1 (resistor divider), 3.3V logic via RST IN2, and local 5V DC-DC output via VCC - triggers fail-safe shutdown on any fault. Use Value: Enables single-chip supervision of mixed-voltage domains, reducing component count vs. discrete reset solutions. |
| Multivoltage Systems: 3V/5V | Intelligent Instruments |
Use Scenario: Handheld test meter with dual Li-ion cells (8.4V pack) stepped down to 5V analog front-end and 3.3V digital controller. IC Role / Device Role / Timing Role: Uses RST IN1 for 5V rail, RST IN2 for 3.3V rail, and VCC for 8.4V battery monitor - generates unified reset on under-voltage or over-voltage events. Use Value: Eliminates need for separate supervisors per rail, cutting PCB area and cost while maintaining independent threshold programming. |
Use Scenario: Portable gas analyzer with sensor bias (±12V), signal chain (5V), and MCU (3.3V) supplies. IC Role / Device Role / Timing Role: Configures RST IN1 for ±12V bias (via dual-divider network), RST IN2 for 5V signal chain, and VCC for 3.3V MCU - asserts RESET if any rail deviates >5%. Use Value: Provides calibrated, temperature-stable reset assertion across wide voltage ranges, critical for measurement integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable reset IC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6308UK01D3+T | Factory-set VCC threshold = 2.5V (UK01) instead of 0.0V (UK00); identical pinout, timeout, and dual-RST IN architecture. | Used when VCC supervision is required alongside RST IN1/RST IN2; MAX6308UK00D3+T disables VCC monitoring by design. | Select MAX6308UK00D3+T only when VCC supervision is intentionally omitted and both reset inputs are externally configured. |
| TPS3808G125DBVR | Single-input supervisor with fixed 1.25V threshold, 200ms timeout, and open-drain output - lacks dual adjustable inputs and push/pull drive. | Suitable for single-rail systems; requires external pull-up and cannot replace dual-rail supervision without adding a second IC. | Choose MAX6308UK00D3+T when dual-rail coordination, push/pull drive, or VCC-threshold disable is mandatory. |
Compared with MAX6308UK01D3+T, the MAX6308UK00D3+T removes VCC monitoring to simplify designs where only external rails require supervision; versus TPS3808G125DBVR, it delivers integrated dual-input capability and eliminates external pull-up dependency - critical for compact, multirail embedded systems.
Availability
MAX6308UK00D3+T is available at Aetrix Electronics and suitable for portable computers, embedded control systems, multivoltage industrial equipment, and intelligent instrumentation requiring stable component supply with guaranteed long-term availability.
Supply support for MAX6308UK00D3+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, computing, and communications markets.
The MAX6305–MAX6313 family was designed to provide flexible, low-power, multirail microprocessor supervision in space-constrained portable and embedded systems - emphasizing precision threshold programming, transient immunity, and minimal external component count.
FAQ
What is the factory-set VCC reset threshold for MAX6308UK00D3+T?
The MAX6308UK00D3+T has a factory-set VCC reset threshold of 0.0V nominal (UK00 coding), meaning VCC monitoring is effectively disabled - reset assertion depends solely on the two adjustable inputs RST IN1 and RST IN2, which are compared to the internal 1.23V reference. This configuration avoids redundant supervision when VCC is already managed elsewhere in the system.
How does the 140ms reset timeout (D3) function in MAX6308UK00D3+T?
The D3 suffix in MAX6308UK00D3+T specifies a factory-programmed minimum reset timeout of 140ms. After all monitored inputs (RST IN1, RST IN2) exceed their thresholds, the internal timer holds RESET low for ≥140ms before deassertion - ensuring sufficient duration for microprocessor initialization, independent of external capacitors or resistors.
Can MAX6308UK00D3+T monitor both 3.3V and 5V rails simultaneously?
Yes, MAX6308UK00D3+T can monitor both 3.3V and 5V rails simultaneously: configure RST IN1 with a resistor divider for the 3.3V rail (e.g., R1=1.0MΩ, R2=1.6MΩ yields ~2.0V at RST IN1 for 3.3V trip), and RST IN2 with a separate divider for the 5V rail. The UK00 coding disables VCC supervision, dedicating full functionality to these two inputs.
What is the operating temperature range for MAX6308UK00D3+T?
The MAX6308UK00D3+T is rated for an operating temperature range of 0°C to +70°C, as indicated by the absence of "E" prefix in the part number (e.g., MAX6308EUK00D3+T would denote -40°C to +85°C). This commercial-grade rating suits indoor portable and industrial control applications with controlled thermal environments.
Does MAX6308UK00D3+T require external components for basic operation?
No, MAX6308UK00D3+T requires no external components for basic dual-rail supervision: its internal 1.23V reference, push/pull RESET driver, and 140ms timeout timer are fully integrated. Only external resistor dividers on RST IN1 and RST IN2 are needed to set custom reset thresholds - no capacitors, pull-ups, or trimming elements are necessary.
MAX6308UK00D3+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:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- Adjustable/Selectable
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6308UK00D3+T FAQ
1.How can I place an order for MAX6308UK00D3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6308UK00D3+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 MAX6308UK00D3+T reliable?
The price and inventory of MAX6308UK00D3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6308UK00D3+T is usually 5 days.
3.What payment methods are accepted for MAX6308UK00D3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6308UK00D3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6308UK00D3+T?
MAX6308UK00D3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6308UK00D3+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 MAX6308UK00D3+T?
For technical support, including MAX6308UK00D3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6308UK00D3+T requirements.
6.How does Aetrix verify that MAX6308UK00D3+T is sourced from the original manufacturer or authorized distributors?
All MAX6308UK00D3+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 MAX6308UK00D3+T meets industry standards.
7.What is the process for return or replacement of MAX6308UK00D3+T?
All MAX6308UK00D3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6308UK00D3+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 MAX6308UK00D3+T part is unused and in its original packaging.
Return procedure for MAX6308UK00D3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6308UK00D3+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…
