My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6808XR46-T
- Part No.:
- MAX6808XR46-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
MAX6808XR46-T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6808XR46-T from Maxim Integrated is a precision 4.6V active-low open-drain voltage detector IC for microprocessor power monitoring. It asserts reset when VCC falls below 4.6V ±2%, provides stable switching via internal hysteresis, guarantees RESET validity down to VCC = 1.0V, draws only 35µA supply current, and is housed in a 3-pin SC70 package-ideal for portable equipment and critical µP power supervision.
For engineers reviewing the MAX6808XR46-T datasheet, MAX6808XR46-T pinout, MAX6808XR46-T application, or MAX6808XR46-T equivalent, key selection criteria include its 4.6V threshold accuracy, open-drain output architecture, 1V minimum operating voltage, immunity to VCC transients, and compatibility with manual-reset–enabled systems using SOT143 variants.
Technical Context
The MAX6808XR46-T implements a precision bandgap-based voltage reference and comparator with built-in hysteresis (VHYST = 0.02–0.03 × VTH−), enabling clean reset assertion/deassertion without oscillation near threshold. Its open-drain RESET output requires an external pullup and supports interfacing with multiple supply domains up to 6V.
It operates across −40°C to +85°C with supply voltage range 1.0V to 5.5V, features 30µs typical VCC-fall delay, and maintains ±2% threshold accuracy over temperature (30ppm/°C tempco). The device is immune to negative-going VCC transients ≤100mV overdrive for durations under 100µs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.60V ±2% (4.508V–4.692V at +25°C); ensures reliable detection of 5V supply undervoltage before system ICs drop out of spec. |
| Output Type | Active-low open-drain; enables wired-OR reset buses, level-shifting, and multi-supply reset coordination. |
| Supply Current | 35µA typical at VCC = 3.6V; minimizes battery drain in portable/battery-powered equipment. |
| Operating Voltage Range | 1.0V to 5.5V; guarantees functional reset assertion even during deep brownout conditions. |
| Hysteresis | 0.02–0.03 × VTH−; prevents chatter during slow-rising/falling VCC near threshold (e.g., power-up sequencing). |
| Reset Delay | 30µs typical (VCC falling at 1mV/µs); provides deterministic timing margin for processor initialization. |
| Tempco | 30ppm/°C; ensures threshold drift remains within ±1.5% over full −40°C to +85°C range. |
Pinout & Package
MAX6808XR46-T is packaged in a 3-pin SC70 (X3-2) surface-mount package with 0.65mm pitch, footprint compatible with SOT23 but smaller (1.25mm × 0.85mm). Pin 1 is RESET (active-low open-drain), Pin 2 is GND, and Pin 3 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low open-drain output | Sinks current when VCC < 4.6V; requires external pullup to define logic-high level and drive load. |
| 2 - GND | Ground reference | Return path for internal circuitry and RESET sink current; must be low-impedance for accurate threshold sensing. |
| 3 - VCC | Supply voltage input | Power source and monitored rail; valid operation supported from 1.0V to 5.5V; tolerant to −0.3V to +6.0V transient. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 4.6V threshold | ±2% accuracy eliminates need for external resistor dividers or calibration in 5V system monitoring. |
| Open-drain RESET output | Enables direct interface with bidirectional µP reset pins (e.g., Motorola 68HC11) without contention. |
| 1V minimum operating voltage | Ensures reset remains asserted through deep brownout-critical for orderly shutdown in battery-backed systems. |
| 35µA quiescent current | Extends battery life in portable scanners, handheld instruments, and remote sensors without sacrificing supervision fidelity. |
| Immunity to VCC transients | Rejects short negative spikes ≤100mV overdrive, preventing false resets during noisy power delivery or switching events. |
Applications
| Bar-Code Scanners | Portable/Battery-Powered Equipment |
|---|---|
|
Use Scenario: Handheld scanners powered by single-cell Li-ion or alkaline batteries experience rapid VCC sag during laser activation or radio transmission. IC Role / Device Role / Timing Role: Voltage detector supervising main 3.3V/5V rail; asserts open-drain RESET to halt processor and peripherals before brownout-induced corruption. Use Value: Prevents firmware crash and memory corruption during intermittent low-voltage events, extending usable battery runtime per charge cycle. |
Use Scenario: Medical glucose meters or portable test instruments operate on coin cells or small LiPo packs with steep discharge curves. IC Role / Device Role / Timing Role: Monitors battery-derived VCC and triggers controlled shutdown when voltage drops below safe operating level for ADC or display driver. Use Value: Guarantees data integrity and user safety by enforcing reset before analog front-end or memory subsystems malfunction. |
| Critical µP and µC Power Monitoring | Intelligent Instruments |
|
Use Scenario: Industrial controllers and PLC modules require fail-safe startup and brownout recovery for deterministic real-time behavior. IC Role / Device Role / Timing Role: Primary reset supervisor for ARM Cortex-M or RISC-V microcontrollers; open-drain output interfaces with FPGA-configurable reset logic. Use Value: Eliminates external components while delivering sub-30µs reset response-enabling compliance with IEC 61508 SIL-2 functional safety timing constraints. |
Use Scenario: Benchtop multimeters and spectrum analyzers use precision analog signal chains sensitive to supply noise and droop. IC Role / Device Role / Timing Role: Independent voltage monitor for analog supply rails (e.g., ±15V op-amp supplies), asserting system-wide RESET if either rail fails. Use Value: Avoids measurement errors and calibration drift by halting acquisition before analog section enters undefined operating region. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6806XR46-T | Active-low push-pull RESET output; no external pullup required; higher output drive (20µA sink @ 1V). | Better suited for driving heavy capacitive loads or legacy µPs lacking pullup capability. | Select when board layout lacks space for pullup resistor or when driving long traces with >100pF capacitance. |
| TLV803EB33DBZR | 3.3V fixed threshold; 1.8V–6V operating range; 1.6µA max ICC; SOT23-3 package. | Ultra-low-power alternative for 3.3V systems where 4.6V threshold is not required. | Choose for energy-harvesting or always-on sensor nodes where <2µA quiescent current is mandatory. |
Compared with MAX6806XR46-T, the MAX6808XR46-T trades push-pull drive for flexible open-drain interfacing and multi-rail coordination; versus TLV803EB33DBZR, it offers tighter 4.6V threshold accuracy and higher noise immunity at the cost of higher supply current-making it optimal for robust 5V system supervision.
Availability
MAX6808XR46-T is available at Aetrix Electronics and suitable for portable/battery-powered equipment, critical µP and µC power monitoring, and intelligent instruments requiring stable component supply and guaranteed long-term availability.
Supply support for MAX6808XR46-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 high-performance analog, mixed-signal, and power-management ICs for demanding industrial, computing, and communications applications.
The MAX6806/MAX6807/MAX6808 family delivers precision voltage supervision with factory-trimmed thresholds and minimal external components-targeting cost-sensitive, space-constrained digital systems needing reliable power-up and brownout protection.
FAQ
What is the exact reset threshold voltage of the MAX6808XR46-T?
The MAX6808XR46-T has a factory-preset nominal reset threshold of 4.60V with ±2% accuracy over temperature, corresponding to a guaranteed range of 4.508V to 4.692V at +25°C. This threshold applies specifically to VCC falling conditions (VTH−), and hysteresis adds ~0.092V to define the rising-edge release point (VTH+).
Does the MAX6808XR46-T support manual reset functionality?
No-the MAX6808XR46-T in the 3-pin SC70 package does not include a manual reset (MR) input. Manual reset is only available on the 4-pin SOT143 variants (e.g., MAX6808US46-T), which dedicate Pin 2 to MR with an internal 80kΩ pulldown resistor. The SC70 version relies solely on VCC monitoring.
What pullup resistor value is recommended for the open-drain RESET output of the MAX6808XR46-T?
A 100kΩ pullup resistor is recommended for the MAX6808XR46-T's open-drain RESET output when driving high-impedance CMOS inputs. This value ensures sufficient sink current for a solid logic low (<0.3V at 20µA) while minimizing static current draw; lower values (e.g., 10kΩ) may be used for faster rise times or heavier capacitive loads.
Can the MAX6808XR46-T operate reliably below 1.0V VCC?
No-the MAX6808XR46-T is specified to guarantee RESET assertion only down to VCC = 1.0V. Below this voltage, the internal circuitry ceases to function and RESET becomes high-impedance. For applications requiring reset validity to ground, a 100kΩ external pulldown resistor on the RESET line is advised to prevent floating states.
Is the MAX6808XR46-T pin-compatible with other MAX680x variants in SC70 packages?
Yes-the MAX6808XR46-T shares identical 3-pin SC70 pinout (RESET–GND–VCC) with all MAX6806XRxx-T and MAX6807XRxx-T variants. However, output logic polarity and type differ: MAX6806XR46-T is active-low push-pull, MAX6807XR46-T is active-high push-pull, and MAX6808XR46-T is active-low open-drain-requiring appropriate schematic and layout adaptation.
MAX6808XR46-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.6V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 30µs Typical
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
MAX6808XR46-T FAQ
1.How can I place an order for MAX6808XR46-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6808XR46-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 MAX6808XR46-T reliable?
The price and inventory of MAX6808XR46-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6808XR46-T is usually 5 days.
3.What payment methods are accepted for MAX6808XR46-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6808XR46-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6808XR46-T?
MAX6808XR46-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6808XR46-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 MAX6808XR46-T?
For technical support, including MAX6808XR46-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6808XR46-T requirements.
6.How does Aetrix verify that MAX6808XR46-T is sourced from the original manufacturer or authorized distributors?
All MAX6808XR46-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 MAX6808XR46-T meets industry standards.
7.What is the process for return or replacement of MAX6808XR46-T?
All MAX6808XR46-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6808XR46-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 MAX6808XR46-T part is unused and in its original packaging.
Return procedure for MAX6808XR46-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6808XR46-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…
