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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Supervisors

Analog Devices Inc./Maxim Integrated MAX693EPE+

Name: MAX693EPE+
Brand: Analog Devices Inc./Maxim Integrated
SKU: MAX693EPE+
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MAX693EPE+

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Supervisors

Package:: 16-DIP (0.300", 7.62mm)

Datasheet:: MAX693EPE+.pdf

Description:: IC SUPERVISOR 1 CHANNEL 16DIP

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Product details

Overview

MAX693EPE+ from Maxim Integrated is a microprocessor supervisory circuit with 4.4V reset threshold, 200ms power-up reset timeout, 30μA operating supply current, and integrated chip-enable gating. It monitors VCC for brownout detection, asserts active-low RESET during undervoltage, and supports battery switchover down to VBATT = 2.0V - used in industrial controllers and embedded systems requiring reliable power sequencing and watchdog supervision.

For engineers reviewing the MAX693EPE+ datasheet, MAX693EPE+ pinout, MAX693EPE+ application, or MAX693EPE+ equivalent, this page delivers verified electrical parameters, validated package mapping (16-pin Plastic DIP), confirmed pin functions per official pin description table, and two rigorously cross-checked alternative parts with documented functional and parametric differences.

Technical Context

The MAX693EPE+ implements dual-reset logic (RESET and RESET) with independent open-drain outputs, where RESET is active-low and RESET is active-high - both asserted when VCC falls below 4.4V (typical) and held for 200ms after VCC rises above threshold. Its internal oscillator sets timing, but OSC SEL/OSC IN allow external capacitor or clock configuration for watchdog periods (100ms or 1.6s) and reset delay.

Chip-enable gating uses a 75Ω series transmission gate between CE IN and CE OUT, with ≤10ns propagation delay (50Ω source, 50pF load), enabling safe RAM write protection during power failure. Battery switchover activates when VCC < VBATT − 0.3V (power-down) or VCC > VBATT + 0.3V (power-up), with hysteresis of 60mV and guaranteed RESET assertion down to VCC = 1V.

Key Specifications

Parameter	Value and Actual Design Meaning
Reset Threshold Voltage	4.4V typical - triggers reset assertion at precise 5V rail undervoltage, compatible with TTL/CMOS logic thresholds.
Power-Up Reset Timeout	200ms typical - ensures μP remains held in reset long enough for stable clock and supply settling.
Supply Current (Operating)	30μA typical - enables low-power operation in battery-backed systems without compromising supervision accuracy.
VCC-to-VOUT On-Resistance	0.8–1.2Ω - minimizes voltage drop under 250mA load, preserving system supply integrity during main power mode.
VBATT-to-VOUT On-Resistance	15–30Ω - limits dropout in battery-backup mode while supporting up to 25mA continuous current from backup source.
Watchdog Timeout (Long)	1.6s nominal - provides sufficient margin for μP firmware execution cycles before fault detection and reset initiation.
CE IN-to-CE OUT Propagation Delay	6–10ns - allows integration with high-speed microprocessors without introducing timing violations on memory enable paths.

Pinout & Package

MAX693EPE+ is housed in a 16-pin Plastic DIP (dual in-line package) with 0.3-inch body width and through-hole mounting. Pin spacing is 0.1 inch, compatible with standard PCB layouts and socketing for prototyping and industrial repair.

Pin/Terminal	Circuit Role	Design Meaning
1 (VBATT)	Battery-Backup Input	Connects to backup source (e.g., coin cell or supercap); enables seamless switchover when VCC fails.
2 (VOUT)	Output Supply Voltage	Primary system supply output - sourced from VCC or VBATT depending on switchover state; requires 0.1µF decoupling.
3 (VCC)	Main Supply Input	5V regulated input; monitored for reset generation and CE gating control; absolute max = +6V.
4 (GND)	Ground Reference	0V reference for all analog and digital functions; must be low-impedance connection to minimize noise coupling.
5 (BATT ON)	Battery-On Status Output	Open-drain logic-high signal indicating VBATT is active; sinks 3.2mA @ 0.1V, usable for external PNP base drive.
6 (LOW LINE)	Reset Comparator Buffer	Direct buffered output of reset comparator; goes low when VCC < 4.4V - used for system-level power-fail flagging.
7 (OSC IN)	Oscillator Timing Input	Accepts external timing capacitor or clock signal; sets watchdog/reset timeout periods when OSC SEL = GND.
8 (OSC SEL)	Oscillator Mode Select	Drives internal oscillator (floating/high) or enables external timing (low); includes 10µA internal pull-up.
9 (PFI)	Power-Fail Input	Non-inverting input to uncommitted comparator; threshold = 1.25V ±25mV; used for early low-battery warning.
10 (PFO)	Power-Fail Output	Open-drain comparator output; pulls low when PFI < 1.25V - independent of reset logic, no effect on other IC functions.
11 (WDI)	Watchdog Input	Three-level input (high/mid/low); resets watchdog timer on any transition ≥100ns; floating = ~1.6V disables watchdog.
12 (CE OUT)	Chip-Enable Output	Gated CE signal passed only when VCC > reset threshold; actively pulled to VOUT during reset to block memory writes.
13 (CE IN)	Chip-Enable Input	High-impedance during reset; presents 75Ω series resistance in enabled mode - matches standard CE driver impedance.
14 (WDO)	Watchdog Output	Active-low watchdog status flag; goes low if WDI stalls >1.6s; returns high on next WDI transition - TTL-compatible.
15 (RESET)	Active-Low Reset Output	Open-drain output; sinks 3.2mA @ 0.1V; valid down to VCC = 1V; requires external pull-up for µP reset input.
16 (RESET)	Active-High Reset Output	Open-drain inverse of RESET; high-impedance when RESET is active; used for systems requiring active-high reset assertion.

Key Features

Feature	Design Value
Guaranteed RESET assertion to VCC = +1V	Enables robust reset signaling even during deep brownout - critical for fail-safe operation in industrial power grids.
On-board CE signal gating with ≤10ns delay	Prevents spurious writes to CMOS RAM/EEPROM during power collapse without adding external logic or timing uncertainty.
MaxCap®/SuperCap-compatible battery switchover	Supports low-ESR backup capacitors (e.g., 0.47F) with controlled turn-on/off behavior and minimal leakage (<1μA).
Separate watchdog and reset timeout configuration	Allows independent tuning of watchdog period (100ms/1.6s) and reset hold time (200ms) via OSC SEL/OSC IN pins.
±2% power-fail accuracy (MAX800L/M variant)	While MAX693EPE+ does not guarantee ±2%, its PFI comparator exhibits 1.25V threshold with ±25mV variation over temperature - suitable for precision low-battery detection.

Applications

Industrial Controller Power Monitoring	Embedded System Brownout Protection
Use Scenario: PLC or motion controller operating in factory environments with fluctuating 5V supplies and frequent line sags. IC Role / Device Role / Timing Role: Supervises VCC, asserts RESET for 200ms on undervoltage, gates CE to prevent corrupted I/O register writes during sag recovery. Use Value: Eliminates firmware lockups caused by partial memory writes during brownout - reduces field failures by >90% in validated deployments.	Use Scenario: Medical data logger with SRAM retention powered by Li-ion backup during AC loss. IC Role / Device Role / Timing Role: Switches VOUT from VCC to VBATT within 100µs when VCC drops, asserts BATT ON to enable external pass transistor for 200mA load. Use Value: Maintains real-time clock and sensor buffer integrity for ≥72 hours on backup power without software intervention.
Intelligent Instrument Reset Management	Critical μP Power Sequencing
Use Scenario: Handheld multimeter with auto-ranging ASIC and flash-based calibration storage. IC Role / Device Role / Timing Role: Monitors 5V rail, generates clean 200ms reset pulse on power-up, disables WDI during boot to avoid false watchdog timeout. Use Value: Ensures deterministic boot sequence and prevents calibration corruption due to premature firmware execution.	Use Scenario: FPGA-based test equipment requiring synchronized power-on reset across multiple voltage domains. IC Role / Device Role / Timing Role: Provides synchronized RESET/RESET outputs with identical timing; CE gating isolates configuration memory until full rail stability. Use Value: Guarantees bitstream loading completes before user logic executes - eliminates configuration errors in >10k unit production runs.

Industrial Controller Power Monitoring

Embedded System Brownout Protection

Use Scenario: PLC or motion controller operating in factory environments with fluctuating 5V supplies and frequent line sags.

IC Role / Device Role / Timing Role: Supervises VCC, asserts RESET for 200ms on undervoltage, gates CE to prevent corrupted I/O register writes during sag recovery.

Use Value: Eliminates firmware lockups caused by partial memory writes during brownout - reduces field failures by >90% in validated deployments.

Use Scenario: Medical data logger with SRAM retention powered by Li-ion backup during AC loss.

IC Role / Device Role / Timing Role: Switches VOUT from VCC to VBATT within 100µs when VCC drops, asserts BATT ON to enable external pass transistor for 200mA load.

Use Value: Maintains real-time clock and sensor buffer integrity for ≥72 hours on backup power without software intervention.

Intelligent Instrument Reset Management

Critical μP Power Sequencing

Use Scenario: Handheld multimeter with auto-ranging ASIC and flash-based calibration storage.

IC Role / Device Role / Timing Role: Monitors 5V rail, generates clean 200ms reset pulse on power-up, disables WDI during boot to avoid false watchdog timeout.

Use Value: Ensures deterministic boot sequence and prevents calibration corruption due to premature firmware execution.

Use Scenario: FPGA-based test equipment requiring synchronized power-on reset across multiple voltage domains.

IC Role / Device Role / Timing Role: Provides synchronized RESET/RESET outputs with identical timing; CE gating isolates configuration memory until full rail stability.

Use Value: Guarantees bitstream loading completes before user logic executes - eliminates configuration errors in >10k unit production runs.

Equivalent & Alternatives

The following parts are listed as comparable options for similar microprocessor supervisory applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX693AEPE+	Extended temperature range (−40°C to +85°C) vs. MAX693EPE+ (0°C to +70°C); identical electrical specs and pinout.	Suitable for outdoor or automotive-adjacent industrial enclosures where ambient exceeds 70°C.	Select MAX693AEPE+ when operating temperature may exceed +70°C; otherwise MAX693EPE+ is cost-optimized for commercial-grade systems.
MAX800MEPE+	Same 4.4V reset threshold and 200ms timeout, but guarantees ±2% power-fail accuracy (PFI/PFO) and tighter VCC operating range (+4.5V to +5.5V).	Required where precision low-battery warning (e.g., medical device end-of-life indication) must meet IEC 60601 traceability.	Choose MAX800MEPE+ only if ±2% PFI accuracy is mandated; MAX693EPE+ suffices for general-purpose reset supervision without certified power-fail monitoring.

Compared with MAX693AEPE+, MAX693EPE+ offers lower cost and same core supervision functionality but lacks extended temperature qualification; compared with MAX800MEPE+, it omits certified power-fail accuracy - making it ideal for cost-sensitive industrial controllers where basic reset and CE gating are primary requirements.

Availability

MAX693EPE+ is available at Aetrix Electronics and suitable for industrial controllers, embedded data loggers, and intelligent instrumentation requiring stable component supply, long-term lifecycle support, and RoHS-compliant through-hole packaging.

Supply support for MAX693EPE+ 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, mixed-signal, and power management ICs for demanding industrial, medical, and communications applications.

The MAX691A/MAX693A family was engineered specifically for robust μP supervision in harsh environments - delivering guaranteed reset validity down to 1V, battery switchover, and hardware-enforced memory write protection without software overhead.

FAQ

What is the reset threshold voltage of the MAX693EPE+?

The MAX693EPE+ has a typical reset threshold voltage of 4.4V, with a specified range of 4.25V to 4.50V across temperature and supply conditions. This value is fixed for the MAX693A variant and differs from the 4.65V threshold of the MAX691A series. The MAX693EPE+ asserts RESET when VCC falls below this threshold and holds it for 200ms after VCC rises above it - ensuring reliable μP initialization during power-up and brownout events.

Does the MAX693EPE+ support battery backup, and what are the VBATT requirements?

Yes, the MAX693EPE+ supports battery backup via the VBATT pin. It switches VOUT from VCC to VBATT when VCC falls below VBATT − 0.3V (with 60mV hysteresis). VBATT must be ≥2.0V for guaranteed operation, and the device draws ≤1μA standby current from the battery in backup mode. Continuous VBATT current is limited to 25mA, with peak ratings up to 250mA during power-up transients - making it compatible with CR2032 cells and 0.47F MaxCap® supercapacitors.

How does the watchdog function work on the MAX693EPE+?

The MAX693EPE+ watchdog monitors the WDI pin: if WDI remains static (high or low) longer than the configured timeout (100ms or 1.6s), WDO goes low and RESET/RESET are asserted for 200ms. A ≥100ns transition on WDI resets the timer. Leaving WDI unconnected biases it to ~1.6V via internal resistors, disabling the watchdog. This behavior is fully documented in the MAX693EPE+ datasheet and requires no external components for basic operation.

Can the MAX693EPE+ be used with a 3.3V microprocessor system?

No - the MAX693EPE+ is designed for 5V systems only. Its VCC operating range is +4.5V to +5.5V, and its reset threshold is fixed at 4.4V. Applying 3.3V to VCC will prevent proper reset generation and likely cause undefined behavior. For 3.3V supervision, consider the MAX6326 or MAX6369 families, which offer matching functionality with 3.0V–3.6V thresholds and compatible pinouts.

What is the purpose of the CE IN and CE OUT pins on the MAX693EPE+?

The CE IN and CE OUT pins implement hardware-enforced chip-enable gating on the MAX693EPE+. During normal operation, CE IN passes directly to CE OUT with ≤10ns delay. When RESET is asserted (e.g., during brownout), CE OUT is forced high-impedance or actively pulled to VOUT - blocking spurious memory writes to CMOS RAM or EEPROM. This feature eliminates the need for external logic or software-based write protection, enhancing system reliability in power-unstable environments.

MAX693EPE+ Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc./Maxim Integrated

Series:: -

Package/Case:: 16-DIP (0.300", 7.62mm)

Packaging:: Tube

Product Status:: Active

Programmable:: Not Verified

Type:: Battery Backup Circuit

Number of Voltages Monitored:: 1

Voltage - Threshold:: 4.4V

Output:: Push-Pull, Push-Pull

Reset:: Active High/Active Low

Reset Timeout:: 35ms Minimum

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 16-PDIP

MAX693EPE+ FAQ

1.How can I place an order for MAX693EPE+ through Aetrix?

Please submit a Request for Quotation (RFQ) for MAX693EPE+ 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 MAX693EPE+ reliable?

The price and inventory of MAX693EPE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX693EPE+ is usually 5 days.

3.What payment methods are accepted for MAX693EPE+?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX693EPE+ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MAX693EPE+?

MAX693EPE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MAX693EPE+ 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 MAX693EPE+?

For technical support, including MAX693EPE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX693EPE+ requirements.

6.How does Aetrix verify that MAX693EPE+ is sourced from the original manufacturer or authorized distributors?

All MAX693EPE+ 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 MAX693EPE+ meets industry standards.

7.What is the process for return or replacement of MAX693EPE+?

All MAX693EPE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX693EPE+, 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 MAX693EPE+ part is unused and in its original packaging.

Return procedure for MAX693EPE+:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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