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Analog Devices Inc./Maxim Integrated MAX807NEUE+
- Part No.:
- MAX807NEUE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MAX807NEUE+.pdf
- Description:
- IC SUPERVISOR MPU 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,316
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Product details
Overview
The MAX807NEUE+ from Maxim Integrated is a full-featured microprocessor supervisory circuit designed for power-monitoring, battery switchover, and watchdog functions in 5V µP systems. It provides ±1.5% reset threshold accuracy (4.575V), 200ms reset timeout, active-low and active-high RESET outputs, independent watchdog timer (1.6s timeout), and 250mA VCC-mode output drive. It is used in portable instrumentation and industrial controllers requiring reliable brownout detection and CMOS RAM backup.
For engineers reviewing the MAX807NEUE+ datasheet, MAX807NEUE+ pinout, MAX807NEUE+ application, or MAX807NEUE+ equivalent, this page delivers verified functional identity, validated 16-pin TSSOP package mapping, confirmed reset/battery-watchdog timing behavior, and real-world design implications of its dual RESET outputs, low-line comparator, and CE gating architecture.
Technical Context
The MAX807NEUE+ integrates five comparators (reset, low-line, power-fail, BATT OK, and battery switchover), a state-machine-based watchdog timer with 1.6s timeout, and a BiCMOS transmission gate for chip-enable signal control. Its reset comparator guarantees valid output down to VCC = 1V, while the low-line comparator triggers 52mV above the reset threshold with ±1.5% accuracy.
It implements battery switchover using internal P-channel MOSFET switching between VCC and VBATT, delivering up to 250mA from VCC or 20mA from battery, with on-resistance of 1.2Ω (VCC→OUT) and 16Ω (BATT→OUT). The CE gating path features 2ns typical propagation delay and 75Ω series resistance in enabled mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.575V ±1.5% - ensures µP reset before system logic fails under 5V supply droop |
| Reset Timeout Period | 200ms - guarantees sufficient time for µP initialization after power recovery |
| Watchdog Timeout | 1.6s typical - detects µP lockup without requiring external timing components |
| VCC Supply Current | 70µA typical - enables long battery life in portable equipment |
| Output Drive (VCC mode) | 250mA - powers CMOS RAM or real-time clocks directly without external buffers |
| Battery Switchover Threshold | VBATT > VCC − 0.2V - cleanly transitions RAM supply during main power loss |
| Low-Line Comparator Offset | +52mV above reset threshold - provides early NMI warning for orderly shutdown |
Pinout & Package
MAX807NEUE+ is supplied in a 16-pin TSSOP package (4.4mm × 5mm, 0.65mm pitch), RoHS-compliant and lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PFI | Power-Fail Input | Non-inverting input of uncommitted comparator; monitors preregulated supply via resistor divider |
| PFO | Power-Fail Output | Active-low CMOS output asserted when PFI < 2.265V; used for early NMI generation |
| GND | Ground Reference | Common return for all analog and digital circuitry; must be low-impedance |
| VCC | Main Supply Input | Nominally +5V input; bypassed with 0.1µF capacitor; powers internal circuitry and drives OUT |
| BATT | Backup Battery Input | Accepts 2.0V–6V battery; enables automatic switchover to preserve RAM during VCC loss |
| OUT | RAM Supply Output | Switched output connected to VCC or BATT; supplies CMOS RAM/RTC with ≤250mA or ≤20mA respectively |
| BATT ON | Battery-On Status Flag | CMOS output high when OUT is sourced from BATT; drives external PNP/PMOS switch for >250mA loads |
| MR | Manual Reset Input | Active-low input with internal 50–200µA pullup; asserts RESET for ≥1µs pulse and holds 200ms after release |
| LOW LINE | Low-Line Warning Output | Active-low CMOS output triggered when VCC falls to 52mV above reset threshold; initiates NMI-driven shutdown |
| RESET | Active-Low Reset Output | Strong-pull-down/weak-pullup output guaranteed valid down to VCC = 1V; wire-OR capable |
| RESET | Active-High Reset Output | Inverted CMOS output sourcing/sinking current; not wire-OR compatible |
| WDO | Watchdog Fault Output | Active-low output asserted if WDI is not toggled within 1.6s; connects to MR to auto-generate resets |
| WDI | Watchdog Input | Edge-sensitive input; watchdog disabled if left floating (internally biased to 1.8V) |
| CE IN | Chip-Enable Input | High-impedance during reset; gated path prevents spurious writes to RAM during power transients |
| CE OUT | Chip-Enable Output | Pass-through of CE IN during normal operation; pulled to higher of VCC/VBATT during reset |
| BATT OK | Battery Status Flag | Active-high output indicating VBATT > 2.265V; valid only when VCC ≥ 4V |
Key Features
| Feature | Design Value |
|---|---|
| Dual RESET outputs | Simultaneous active-low (wire-OR compatible) and active-high (full-drive) signals simplify interface to diverse µP reset inputs |
| Low-line comparator | 52mV offset above reset threshold with ±1.5% accuracy enables deterministic early-warning NMI for software-controlled shutdown |
| Integrated CE gating | 2ns propagation delay and 75Ω series resistance prevent erroneous memory writes during power-up/down sequences |
| Battery switchover control | Automatic transition between VCC and VBATT with 1.2Ω (VCC) / 16Ω (BATT) on-resistance minimizes voltage drop during backup |
| Watchdog fault feedback | WDO output directly drives MR to generate self-resetting watchdog faults-no external logic required |
| MaxCap®/SuperCap® compatibility | Supports high-capacitance backup solutions without compromising switchover timing or leakage performance |
Applications
| Portable Data Loggers | Industrial PLC Controllers |
|---|---|
Use Scenario: Battery-powered field instruments logging sensor data over extended periods with intermittent host communication. IC Role / Device Role / Timing Role: Supervises 5V system rail, switches RAM/RTC to backup battery during mains loss, and asserts low-line NMI to trigger graceful log finalization. Use Value: Prevents data corruption by ensuring RAM retention and controlled shutdown before VCC drops below 4.575V. |
Use Scenario: DIN-rail mounted programmable logic controllers operating in factory environments with fluctuating 24VDC input supplies. IC Role / Device Role / Timing Role: Monitors regulated 5V logic supply, generates watchdog resets on firmware hangs, and gates CE to protect configuration EEPROM during brownouts. Use Value: Eliminates need for external reset supervisors and discrete CE isolation, reducing BOM count and board area. |
| Medical Diagnostic Handhelds | Smart Energy Meters |
Use Scenario: Handheld ultrasound or ECG devices requiring FDA-compliant power integrity and nonvolatile memory retention during battery swaps. IC Role / Device Role / Timing Role: Provides 200ms reset hold time, BATT OK flag verification, and dual RESET outputs compatible with safety-critical µP reset architectures. Use Value: Guarantees deterministic reset behavior across temperature (−40°C to +85°C) and battery voltage (2.0V–4.5V). |
Use Scenario: Revenue-grade electricity meters with tamper-detection circuits and secure flash storage needing fail-safe power monitoring. IC Role / Device Role / Timing Role: Uses PFI/PFO to monitor preregulated DC-DC output, generating early NMI for meter firmware to seal logs before power collapse. Use Value: Enables compliance with IEC 62053-21 by providing accurate, hysteresis-stabilized power-fail detection independent of main µP supply. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809SEUS+T | Simpler 3-pin SOT23 supervisor; single 2.93V reset threshold, no watchdog, no battery switchover, no CE gating | Only suitable for basic reset-only use cases; cannot replace MAX807NEUE+ in battery-backed or watchdog-enabled designs | Select only if design requires minimal footprint and omits RAM backup, watchdog, and low-line warning functionality |
| TPS3808G33DBVR | TI supervisor with 3.3V reset, adjustable watchdog (50ms–10s), but no battery switchover, no CE gating, and no low-line comparator | Lacks integrated power-path control for RAM backup; requires external circuitry for battery management and CE isolation | Choose when primary need is programmable watchdog timing on 3.3V systems, and battery backup is handled separately |
Compared with MAX807NEUE+, both alternatives omit critical integrated functions: battery switchover, CE signal gating, and low-line comparator-requiring additional discrete components and PCB area to achieve equivalent system-level reliability in µP power monitoring.
Availability
MAX807NEUE+ is available at Aetrix Electronics and suitable for portable instrumentation, industrial controllers, and medical handhelds requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for MAX807NEUE+ 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 precision analog, mixed-signal, and power management ICs for industrial, computing, and communications applications.
The MAX807NEUE+ belongs to Maxim's µP supervisory product line, engineered to consolidate power monitoring, battery backup control, and watchdog supervision into a single 16-pin IC for space-constrained, high-reliability embedded systems.
FAQ
What is the exact reset threshold voltage of the MAX807NEUE+?
The MAX807NEUE+ has a nominal reset threshold of 4.575V with ±1.5% accuracy over temperature (−40°C to +85°C). This value is specified in the Electrical Characteristics table under "VRST" for the "N" variant and is guaranteed across the full operating range without external calibration.
Does the MAX807NEUE+ support battery switchover for CMOS RAM backup?
Yes, the MAX807NEUE+ supports automatic battery switchover: when VCC falls below the reset threshold and VBATT exceeds VCC − 0.2V, the OUT pin seamlessly transitions from VCC to BATT. It delivers up to 20mA in battery-backup mode with 16Ω typical on-resistance, preserving RAM contents during main power loss.
Can the MAX807NEUE+ generate an early power-fail warning before reset asserts?
Yes-the MAX807NEUE+ includes a dedicated low-line comparator whose output (LOW LINE) goes active-low when VCC falls to 52mV above the 4.575V reset threshold. This provides a deterministic, hysteresis-stabilized early warning (typically at ~4.627V) to trigger non-maskable interrupt (NMI)-based shutdown routines.
How does the watchdog function operate in the MAX807NEUE+?
The MAX807NEUE+ watchdog monitors the WDI input: if no edge (low-to-high or high-to-low) occurs within 1.6s, WDO goes low. Connecting WDO to MR creates an autonomous reset loop-each watchdog fault generates a 200ms reset pulse. The watchdog is disabled if WDI is left floating (internally biased to 1.8V) or if VCC < reset threshold.
Is the MAX807NEUE+ pin-compatible with other MAX807 variants like MAX807LEUE+ or MAX807MEUE+?
No-while all MAX807 variants share identical pinout and package (16-pin TSSOP), they differ in reset threshold: MAX807LEUE+ = 4.675V, MAX807MEUE+ = 4.425V, and MAX807NEUE+ = 4.575V. Substituting variants requires verifying system-level voltage margin; electrical and thermal behavior otherwise matches.
MAX807NEUE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.425V
- Output:
- -
- 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-TSSOP
MAX807NEUE+ FAQ
1.How can I place an order for MAX807NEUE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX807NEUE+ 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 MAX807NEUE+ reliable?
The price and inventory of MAX807NEUE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX807NEUE+ is usually 5 days.
3.What payment methods are accepted for MAX807NEUE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX807NEUE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX807NEUE+?
MAX807NEUE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX807NEUE+ 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 MAX807NEUE+?
For technical support, including MAX807NEUE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX807NEUE+ requirements.
6.How does Aetrix verify that MAX807NEUE+ is sourced from the original manufacturer or authorized distributors?
All MAX807NEUE+ 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 MAX807NEUE+ meets industry standards.
7.What is the process for return or replacement of MAX807NEUE+?
All MAX807NEUE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX807NEUE+, 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 MAX807NEUE+ part is unused and in its original packaging.
Return procedure for MAX807NEUE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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