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Analog Devices Inc./Maxim Integrated MAX800LESE+
- Part No.:
- MAX800LESE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX800LESE+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,169
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Product details
Overview
The MAX800LESE+ from Maxim Integrated is a microprocessor supervisory circuit designed for critical 5V power monitoring and system reset control in embedded controllers and intelligent instruments. It features a 4.65V typical reset threshold, 200ms power-up reset timeout, guaranteed RESET assertion down to VCC = 1V, ±2% power-fail accuracy, and integrated chip-enable gating with ≤10ns propagation delay.
For engineers reviewing the MAX800LESE+ datasheet, MAX800LESE+ pinout, MAX800LESE+ application, or MAX800LESE+ equivalent, this device delivers verified low-power supervision (30μA operating current), battery-switchover support, watchdog timing flexibility, and robust CE signal protection-key selection criteria for industrial controller BOMs and μP-based instrumentation.
Technical Context
The MAX800LESE+ integrates a precision voltage monitor, dual-reset outputs (active-low RESET and active-high RESET), a programmable watchdog timer with internal/external timing options, and a bidirectional CE signal gate. Its reset generator uses an internal oscillator with 200ms typ timeout, while the watchdog supports long (1.6s) and short (100ms) periods via OSC SEL configuration.
Battery switchover is managed by a comparator with 60mV hysteresis and thresholds at VBATT ± 0.3V; VOUT automatically routes to VBATT when VCC falls below both VBATT and the 4.65V reset threshold. The CE gate operates as a 75Ω series transmission switch, enabling clean disablement of memory access during brownout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 4.65V typical; ensures reliable μP reset initiation at nominal 5V supply sag before brownout. |
| Reset Timeout Period | 200ms typical on power-up; provides sufficient hold time for stable clock and memory initialization. |
| Supply Current (Operating) | 30μA typical; enables low-quiescent supervision in always-on controller subsystems. |
| Power-Fail Accuracy | ±2% guaranteed; supports precise low-battery or early power-loss detection without external calibration. |
| CE Propagation Delay | ≤10ns max; preserves high-speed memory interface timing integrity during normal operation. |
| VCC-to-VOUT On-Resistance | 0.8–1.2Ω (MAX800_C); limits dropout to ≤200mV at 250mA load, maintaining stable core supply. |
| RESET Validity Range | Down to VCC = 1V; ensures deterministic reset assertion even during deep undervoltage conditions. |
Pinout & Package
MAX800LESE+ is supplied in a 16-pin narrow SOIC package (SO-16N) with standard 0.150" body width and 1.27mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VBATT | Battery-backup input | Connects to backup capacitor or battery; enables seamless VOUT sourcing when VCC fails. |
| 2 VOUT | Output supply voltage | Primary system supply rail; internally switches between VCC and VBATT based on voltage comparison. |
| 3 VCC | Main 5V supply input | Regulated 4.75–5.5V input; monitored for reset generation and CE gating enable/disable logic. |
| 4 GND | Ground reference | 0V return for all analog and digital functions; must be low-impedance for accurate threshold sensing. |
| 5 BATT ON | Battery-active indicator | Open-drain output pulled high when VOUT sourced from VBATT; used for status signaling or PNP base drive. |
| 6 LOW LINE | Reset comparator buffered output | Active-low flag indicating VCC < reset threshold; independent of reset timeout timing. |
| 7 OSC IN | Oscillator timing input | Accepts external capacitor or clock; sets watchdog/reset timeouts when OSC SEL = GND. |
| 8 OSC SEL | Oscillator mode select | High = internal oscillator (1.6s/200ms); low = external timing; floating = default internal mode. |
| 9 PFI | Power-fail comparator input | Non-inverting input referenced to 1.25V; triggers PFO when supply drops below programmable threshold. |
| 10 PFO | Power-fail comparator output | Open-drain output asserted low on PFI < 1.25V; usable for low-battery warning or system shutdown sequencing. |
| 11 WDI | Watchdog input | Three-level input (high/low/floating); resets watchdog timer on edge or pulse ≥100ns; floating disables function. |
| 12 CE OUT | Chip-enable gated output | Passes CE IN only when VCC > reset threshold; blocks memory writes during power failure. |
| 13 CE IN | Chip-enable gated input | High-impedance when reset asserted; otherwise presents ~75Ω series resistance to CE OUT path. |
| 14 WDO | Watchdog output | Asserts low if WDI stalls > timeout period; remains low until next WDI transition; open-drain. |
| 15 RESET | Active-low reset output | Open-drain, sinks 3.2mA @ 0.1V; guaranteed functional down to VCC = 1V; requires external pullup. |
| 16 RESET | Active-high reset output | Open-drain inverse of RESET; high-impedance when RESET is active; used for μP with active-high reset. |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed RESET assertion to VCC = 1V | Enables deterministic reset behavior in deep brownout scenarios where other supervisors fail. |
| ±2% power-fail accuracy (MAX800L) | Eliminates need for external resistor divider trimming in battery-monitoring or UPS applications. |
| On-board CE signal gating (≤10ns delay) | Prevents spurious memory writes during power transients without adding external logic or layout complexity. |
| Backup-battery switchover with 60mV hysteresis | Ensures glitch-free VOUT transition between main and backup supplies, avoiding system reset on bounce. |
| Configurable watchdog timeout (100ms / 1.6s) | Supports both fast-recovery systems and long-latency firmware execution without redesign. |
| MaxCap®/SuperCap compatible | Validated for use with high-capacitance backup sources (e.g., 0.47F), simplifying energy-harvesting designs. |
Applications
| Industrial Controller Supervision | Intelligent Instrument Power Management |
|---|---|
|
Use Scenario: PLC or motion controller requiring fail-safe reset during AC line sags or DC bus droop. IC Role / Device Role / Timing Role: Primary reset supervisor and VCC/VBATT switchover manager; asserts RESET for 200ms after recovery. Use Value: Prevents corrupted I/O state or runaway logic by guaranteeing μP reset validity down to VCC = 1V and blocking CE during undervoltage. |
Use Scenario: Portable multimeter or data logger with coin-cell backup and low-battery alert. IC Role / Device Role / Timing Role: Dual-role supervisor: monitors main supply via RESET threshold and battery health via PFI/PFO comparator. Use Value: Delivers ±2% power-fail accuracy for calibrated low-battery warning and maintains RTC memory via VOUT switchover. |
| Critical μP Power Monitoring | Embedded System Watchdog Control |
|
Use Scenario: Medical diagnostic equipment where uncontrolled reboot could compromise patient safety. IC Role / Device Role / Timing Role: Redundant power monitor with independent LOW LINE flag and RESET/RESET dual outputs. Use Value: Provides two independent reset signals (active-low and active-high) for diverse μP families, plus real-time VCC status via LOW LINE. |
Use Scenario: Network gateway with complex boot sequence requiring configurable watchdog timeout. IC Role / Device Role / Timing Role: Programmable watchdog timer with selectable 100ms or 1.6s timeout via OSC SEL pin. Use Value: Supports both fast-failure detection (short period) and long initialization windows (long period) without firmware changes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX691ACSE+ | Same 4.65V reset threshold and 200ms timeout, but lacks ±2% power-fail accuracy spec and MaxCap compatibility documentation. | Best suited for cost-sensitive non-battery-backed applications where PFI/PFO usage is minimal. | Select MAX691ACSE+ only if power-fail comparator accuracy and supercapacitor support are not required. |
| TPS3808G33DBVR | Fixed 3.3V reset threshold, no battery switchover, no CE gating, lower quiescent current (1.8μA), no watchdog. | Applicable only for 3.3V systems without backup power or memory write protection needs. | Choose TPS3808G33DBVR for simple 3.3V reset-only supervision; not a functional substitute for MAX800LESE+ in 5V battery-backed designs. |
Compared with MAX691ACSE+, MAX800LESE+ adds guaranteed ±2% PFI accuracy and MaxCap compatibility; versus TPS3808G33DBVR, it provides full 5V supervision, dual reset outputs, CE gating, and watchdog-making it uniquely suitable for battery-backed industrial controllers.
Availability
MAX800LESE+ is available at Aetrix Electronics and suitable for industrial controllers, intelligent instrumentation, medical diagnostics equipment, and critical μP power monitoring applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MAX800LESE+ 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, automotive, and communications markets.
The MAX800L family was designed specifically for robust 5V microprocessor supervision in harsh environments-emphasizing guaranteed low-voltage reset, battery switchover integrity, and memory write protection during power faults.
FAQ
What is the reset threshold voltage for MAX800LESE+?
The MAX800LESE+ has a typical reset threshold voltage of 4.65V, with a guaranteed range of 4.50V to 4.75V over temperature and supply variations. This value applies specifically to the MAX800L variant (including MAX800LESE+) and is distinct from the 4.4V threshold of the MAX800M series. The threshold is internally trimmed and does not require external components.
Does MAX800LESE+ support battery backup operation?
Yes, MAX800LESE+ fully supports battery backup operation. When VCC falls below both the reset threshold (4.65V) and VBATT, the device automatically switches VOUT sourcing from VCC to VBATT. The BATT ON output goes high to indicate switchover, and internal circuitry guarantees RESET assertion remains valid down to VCC = 1V during transition.
How does the watchdog function work on MAX800LESE+?
The MAX800LESE+ watchdog monitors the WDI pin for transitions. If WDI remains static (high or low) longer than the configured timeout (100ms or 1.6s), WDO and both RESET outputs assert for 200ms. Leaving WDI floating disables the watchdog via an internal 100kΩ divider that biases it to ~1.6V, a documented behavior confirmed in the datasheet's "Watchdog Input" section.
What package type is used for MAX800LESE+?
MAX800LESE+ is packaged in a 16-pin narrow SOIC (SO-16N) with 1.27mm lead pitch and 0.150" body width. The "ESE" suffix explicitly denotes this narrow SOIC variant per Maxim's ordering guide, and the "+" indicates lead-free RoHS-compliant packaging.
Can MAX800LESE+ be used with supercapacitors?
Yes, MAX800LESE+ is explicitly MaxCap® and SuperCap compatible, as stated in the Features section of the datasheet. Its VBATT input supports high-capacitance backup sources (e.g., 0.47F), and its battery switchover circuitry is characterized for stable operation with such devices under specified load and temperature conditions.
MAX800LESE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.65V
- Output:
- Open Drain, Push-Pull
- Reset:
- Active High/Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
MAX800LESE+ FAQ
1.How can I place an order for MAX800LESE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX800LESE+ 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 MAX800LESE+ reliable?
The price and inventory of MAX800LESE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX800LESE+ is usually 5 days.
3.What payment methods are accepted for MAX800LESE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX800LESE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX800LESE+?
MAX800LESE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX800LESE+ 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 MAX800LESE+?
For technical support, including MAX800LESE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX800LESE+ requirements.
6.How does Aetrix verify that MAX800LESE+ is sourced from the original manufacturer or authorized distributors?
All MAX800LESE+ 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 MAX800LESE+ meets industry standards.
7.What is the process for return or replacement of MAX800LESE+?
All MAX800LESE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX800LESE+, 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 MAX800LESE+ part is unused and in its original packaging.
Return procedure for MAX800LESE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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