My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX6302ESA
- Part No.:
- MAX6302ESA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX6302ESA.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,813
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX6302ESA from Maxim Integrated is an active-high, open-drain microprocessor supervisory circuit designed for reliable reset and watchdog monitoring in low-power embedded systems. It features adjustable reset threshold (≥1.22V), adjustable reset timeout (2.8–5.2 ms with 1500pF), 500× watchdog timeout multiplier, 4µA supply current, and guaranteed RESET assertion down to VCC = 1.31V - used in battery-powered medical instruments and industrial controllers requiring brownout immunity.
For engineers reviewing the MAX6302ESA datasheet, MAX6302ESA pinout, MAX6302ESA application, or MAX6302ESA equivalent, key selection criteria include its active-high open-drain reset output, extended-mode watchdog timing scalability via WDS pin, transient-immune reset input, and SO-8 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX6302ESA implements a precision bandgap-based reset comparator referenced to 1.22V, with external resistor divider programmability for custom threshold voltages. Its reset timeout is generated by a 500nA current source charging CSRT, enabling µs-to-ms adjustment (tRP = 2.67 × CSRT).
Watchdog operation uses identical 500nA timing current on SWT, with mode selection via WDS: normal mode (WDS = GND) yields ms-range timeouts; extended mode (WDS = VCC) multiplies timeout by 500x to seconds/minutes. WDI accepts ≥30ns pulses and clears the timer on any edge; WDS transitions also reset the watchdog counter.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Output Type | Active-high, open-drain - requires external pull-up; compatible with bidirectional µP reset pins and mixed-voltage I/O domains. |
| Supply Voltage Range | +1.31V to +5.5V - supports operation down to ultra-low-voltage brownout detection while maintaining valid RESET assertion. |
| Quiescent Current | 4.0µA typical - enables multi-year battery life in portable equipment without compromising supervision reliability. |
| Reset Threshold Accuracy | ±25mV at 1.22V reference - ensures precise voltage monitoring across temperature (±0.002V/°C drift) and supply variation. |
| Reset Timeout Range | 2.8ms to 5.2ms (with 1500pF CSRT) - configurable via capacitor value to match µP initialization time requirements. |
| Watchdog Timeout Multiplier | 500× extension (WDS = VCC) - converts 4ms base timeout into 2s, enabling wake-up timer functionality for sleep-mode µP control. |
| Power-Supply Transient Immunity | Withstands ≤50µs, 100mV negative-going VCC glitches - prevents spurious resets during switching noise or load transients. |
Pinout & Package
MAX6302ESA is housed in an 8-pin SO (Small Outline) package per JEDEC MS-012, with 1.27mm pitch and gull-wing leads. Pin 1 is marked by a beveled corner or dot; device orientation follows standard SO top-view convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET IN | Reset threshold reference input | High-impedance node for external resistor divider; sets VRST = 1.22 × (R1 + R2)/R2 - determines brownout detection point. |
| 2 - GND | Ground reference | Analog and digital ground return; must be low-impedance connection to minimize noise coupling into SRT/SWT timing paths. |
| 3 - SRT | Reset timeout capacitor terminal | 500nA constant-current source charges CSRT to generate tRP; requires low-leakage ceramic capacitor (≤10nA). |
| 4 - SWT | Watchdog timeout capacitor terminal | Identical 500nA current source as SRT; CSWT value defines base watchdog period before WDS scaling. |
| 5 - WDS | Watchdog mode select | Digital control: GND = normal mode (ms timeout), VCC = extended mode (500× timeout); transition resets watchdog timer. |
| 6 - WDI | Watchdog input | Edge-sensitive input; rising/falling transition within timeout period clears watchdog; unconnected in extended mode disables function. |
| 7 - RESET | Active-high open-drain reset output | Drives high only when pulled up externally; asserts high during reset condition - matches µP reset-active-high logic. |
| 8 - VCC | Supply voltage input | +1.31V to +5.5V operation; requires local 0.1µF ceramic bypass capacitor placed adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable reset threshold via external resistors | Enables precise brownout detection at any voltage ≥1.22V without redesigning silicon - supports diverse rail voltages (1.8V, 3.3V, 5V). |
| 500× watchdog timeout extension | Converts millisecond-scale supervision into minute-scale wake-up intervals - eliminates need for external timers in low-power sleep architectures. |
| Power-supply transient immunity | Guarantees no false reset from short-duration VCC dips - critical for noisy industrial or automotive power environments. |
| 4µA quiescent current | Reduces standby power draw by >90% vs. legacy supervisors - extends battery life in portable medical and sensor nodes. |
| Open-drain active-high RESET output | Provides level-shifting flexibility and safe interfacing with bidirectional µP reset pins (e.g., 68HC11) using single pull-up resistor. |
Applications
| Medical Portable Monitors | Industrial PLC Controllers |
|---|---|
Use Scenario: Battery-powered ECG and pulse oximeter units operating in intermittent measurement mode with deep-sleep cycles. IC Role / Device Role / Timing Role: MAX6302ESA acts as system-level supervisor: monitors main 3.3V rail, triggers wake-up via extended watchdog timeout, and asserts active-high RESET to initialize MCU on each measurement cycle. Use Value: Enables 5-year battery life by reducing average current to <1µA during sleep, while guaranteeing deterministic wake-up timing and brownout-safe startup. | Use Scenario: DIN-rail mounted programmable logic controller with isolated I/O and 24V DC input subjected to motor-switching transients. IC Role / Device Role / Timing Role: MAX6302ESA supervises the 5V logic supply, providing glitch-immune reset assertion and configurable watchdog timeout to detect firmware hangs during analog acquisition sequences. Use Value: Prevents undetected lockups during field operation by combining transient-hardened reset with software-execution monitoring scalable to 2+ second windows. |
| Set-Top Box Power Management | Intelligent Sensor Nodes |
Use Scenario: Consumer STB with fast boot requirement (<500ms) and standby power budget <100mW. IC Role / Device Role / Timing Role: MAX6302ESA provides precise 3.3V rail monitoring and adjustable reset delay matching SoC boot sequence; WDS pin toggled by firmware to switch between supervision and wake-up modes. Use Value: Eliminates boot-time race conditions and enables sub-second recovery from power interruptions without external RC networks. | Use Scenario: Wireless environmental sensor node powered by coin-cell battery, transmitting data every 10 minutes. IC Role / Device Role / Timing Role: MAX6302ESA serves as both power-on supervisor and autonomous wake-up timer: extended watchdog timeout wakes MCU, which performs sensing and radio transmission before re-entering sleep. Use Value: Replaces discrete timer + supervisor ICs, cutting BOM cost and PCB area while maintaining ±1% timing accuracy over temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6304ESA | Push-pull active-high RESET output (vs. open-drain); same pinout, timing, and voltage specs. | Eliminates need for external pull-up; better suited for noise-sensitive environments where leakage paths must be avoided. | Select MAX6304ESA when driving long traces or high-capacitance loads where rise time matters, or when board layout prohibits external pull-up placement. |
| TPS3808G12DBVR | Fixed 1.2V reset threshold; 2.5µA ICC; push-pull active-low output; no watchdog function. | Lacks adjustable threshold and watchdog - suitable only for simple power-on reset without runtime supervision. | Choose TPS3808G12DBVR for cost-sensitive, non-watchdog applications where fixed threshold suffices and active-low reset is acceptable. |
Compared with MAX6304ESA, MAX6302ESA offers lower interface overhead in bidirectional reset systems but requires external pull-up; versus TPS3808G12DBVR, it delivers full supervision capability at slightly higher quiescent current but enables brownout adaptability and firmware hang detection.
Availability
MAX6302ESA is available at Aetrix Electronics and suitable for medical portable monitors, industrial PLC controllers, set-top box power management, and intelligent sensor nodes requiring stable component supply across extended temperature ranges.
Supply support for MAX6302ESA 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, medical, and communications markets.
The MAX6301–MAX6304 family was engineered specifically for low-power microprocessor supervision with field-programmable reset and watchdog timing - targeting battery-operated and transient-prone embedded systems needing robust, adaptable reset control.
FAQ
What is the minimum VCC required for guaranteed RESET assertion in MAX6302ESA?
The MAX6302ESA guarantees valid active-high RESET assertion down to VCC = 1.31V. Below this voltage, output drive capability degrades; for operation below 1.31V, design margin must account for reduced VOL and potential indeterminate state. This specification ensures reliable brownout detection in low-voltage systems such as 1.8V or dual-supply µP applications where the supervisor remains functional during partial power collapse.
How does the WDS pin affect watchdog behavior in MAX6302ESA?
In MAX6302ESA, the WDS pin selects watchdog mode: when tied to GND, it enables normal mode with ms-range timeout determined by CSWT; when tied to VCC, it activates extended mode, multiplying the base timeout by 500× to yield second- or minute-scale intervals. A WDS transition always resets the watchdog counter, and the pin's state is sampled continuously - making it suitable for dynamic firmware-controlled wake-up scheduling without hardware changes.
Can MAX6302ESA monitor voltages other than VCC?
Yes, MAX6302ESA can monitor any DC voltage via the RESET IN pin using an external resistor divider. The monitored voltage (VIN) connects to the divider midpoint, and VRST is calculated as 1.22 × (R1 + R2)/R2. This allows supervision of auxiliary rails (e.g., 1.8V core, 3.3V I/O, or battery voltage) independently of VCC, supporting multi-rail systems common in FPGAs, DSPs, and mixed-signal SoCs.
What capacitor type is recommended for SRT and SWT in MAX6302ESA?
Ceramic capacitors with leakage <10nA are recommended for both SRT and SWT in MAX6302ESA. X7R or C0G dielectrics are preferred due to low DC leakage, minimal voltage coefficient, and stable capacitance over temperature. Avoid electrolytic or high-leakage film types, as SRT/SWT rely on precision 500nA current sources - excessive leakage causes timing errors in reset and watchdog periods, potentially leading to premature or delayed resets.
Is MAX6302ESA RoHS-compliant and lead-free?
Yes, MAX6302ESA is available in RoHS-compliant, lead(Pb)-free packaging. Per Maxim's ordering information, the standard MAX6302ESA part number denotes lead-free construction; no suffix modification is required. The device meets EU RoHS Directive 2011/65/EU and is suitable for environmentally regulated industrial and medical applications requiring full material compliance documentation.
MAX6302ESA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- Adjustable/Selectable
- Output:
- Open Drain or Open Collector
- Reset:
- Active High
- Reset Timeout:
- 2.8ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX6302ESA FAQ
1.How can I place an order for MAX6302ESA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6302ESA 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 MAX6302ESA reliable?
The price and inventory of MAX6302ESA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6302ESA is usually 5 days.
3.What payment methods are accepted for MAX6302ESA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6302ESA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6302ESA?
MAX6302ESA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6302ESA 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 MAX6302ESA?
For technical support, including MAX6302ESA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6302ESA requirements.
6.How does Aetrix verify that MAX6302ESA is sourced from the original manufacturer or authorized distributors?
All MAX6302ESA 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 MAX6302ESA meets industry standards.
7.What is the process for return or replacement of MAX6302ESA?
All MAX6302ESA units undergo pre-shipment inspection (PSI). If there is an issue with MAX6302ESA, 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 MAX6302ESA part is unused and in its original packaging.
Return procedure for MAX6302ESA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX6302ESA 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…
