My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX693AEPE+
- Part No.:
- MAX693AEPE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX693AEPE+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,868
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The MAX693AEPE+ from Maxim Integrated is a microprocessor supervisory circuit designed for critical power monitoring and system reset control in industrial and embedded systems. It features a 4.4V typical reset threshold, 200ms power-up reset timeout, 30μA operating supply current, and integrated battery switchover with VCC-to-VOUT on-resistance of 0.8–1.4Ω - enabling reliable CMOS RAM backup during main power loss in controllers and intelligent instruments.
For engineers reviewing the MAX693AEPE+ datasheet, MAX693AEPE+ pinout, MAX693AEPE+ application, or MAX693AEPE+ equivalent, this device delivers deterministic reset assertion down to VCC = 1V, guaranteed ±2% power-fail accuracy (MAX800L/M variant), watchdog timeout selection via OSC SEL/OSC IN, and chip-enable gating with ≤10ns propagation delay - all in a 16-pin plastic DIP package rated for -40°C to +85°C operation.
Technical Context
The MAX693AEPE+ implements dual reset outputs (active-low RESET and active-high RESET), a dedicated watchdog timer with selectable long/short timeout periods (1.6s / 100ms nominal), and an uncommitted power-fail comparator (PFI/PFO) with 1.25V threshold and 25μs response. Its internal VCC/VBATT switchover logic asserts both reset outputs when VCC falls below 4.4V and remains below VBATT − 1.2V.
Chip-enable gating uses a transmission gate (75–150Ω on-resistance) between CE IN and CE OUT, disabled during reset assertion to prevent spurious writes to external memory. The BATT ON output signals switchover status, sinking 3.2mA at 0.1V low, while WDI accepts three-level input (high/low/floating) with internal 1.6V bias to disable watchdog when unconnected.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 4.40V typical; ensures reliable μP reset initiation during brownout conditions at nominal 5V rail. |
| Reset Timeout Period | 200ms typical after power-up; provides sufficient hold time for stable clock and memory initialization. |
| Supply Current (Operating) | 30μA typical; enables low-power operation in always-on monitoring circuits without burdening supply. |
| VCC-to-VOUT On-Resistance | 0.8–1.4Ω; limits voltage drop to ≤200mV at 250mA load, preserving logic-level margins for downstream ICs. |
| Power-Fail Accuracy | ±2% (guaranteed for MAX800L/M variants); supports precise low-battery or early power-loss detection. |
| CE Propagation Delay | 6–10ns; allows use with high-speed microprocessors without timing violation on memory enable paths. |
| Watchdog Timeout (Long) | 1.6s nominal; configurable via OSC SEL/OSC IN to match firmware execution cycle safety margins. |
Pinout & Package
MAX693AEPE+ is housed in a 16-pin plastic DIP (Dual In-line Package) with 0.3-inch body width, through-hole mounting, and RoHS-compliant lead-free finish (indicated by '+' suffix). Pin spacing is 0.1 inch, compatible with standard PCB footprints and socketing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VBATT | Battery-Backup Input | Connects to backup capacitor or battery; enables seamless switchover when VCC drops below reset threshold. |
| 2 VOUT | Output Supply Voltage | Delivers regulated system supply; sourced from VCC (normal) or VBATT (backup), decoupled with 0.1µF capacitor. |
| 3 VCC | Main Supply Input | 5V nominal input; powers internal circuitry and drives VOUT via low-RDS(ON) PMOS switch. |
| 4 GND | Ground Reference | 0V reference for all analog and digital functions; must be low-impedance connection to system ground plane. |
| 5 BATT ON | Battery-On Status Output | Open-drain logic-high signal indicating VBATT is active; sinks 3.2mA at 0.1V for driving PNP base or LED indicator. |
| 6 LOW LINE | Reset Comparator Buffer | Active-low buffered output of reset threshold comparator; used for independent power-good signaling. |
| 7 OSC IN | External Oscillator Input | Accepts timing capacitor or external clock; sets watchdog/reset timeout periods when OSC SEL = GND. |
| 8 OSC SEL | Oscillator Select Input | High = internal oscillator (1.6s/200ms defaults); low = external timing control; internal 10µA pull-up. |
| 9 PFI | Power-Fail Input | Non-inverting input to uncommitted comparator; 1.25V threshold enables low-battery or AC-loss detection. |
| 10 PFO | Power-Fail Output | Open-drain output asserting low when PFI < 1.25V; independent of reset function, usable for system alerts. |
| 11 WDI | Watchdog Input | Three-level input (high/low/floating); transition resets watchdog timer; floating disables watchdog via 1.6V bias. |
| 12 CE OUT | Chip-Enable Output | Gated CE signal passed only when VCC > reset threshold; prevents memory corruption during power failure. |
| 13 CE IN | Chip-Enable Input | High-impedance input during reset; series 75Ω resistance in enabled mode matches typical μP CE drive strength. |
| 14 WDO | Watchdog Output | Asserts low on watchdog timeout; open-drain output synchronized with RESET assertion for coordinated recovery. |
| 15 RESET | Active-Low Reset Output | Open-drain output valid down to VCC = 1V; requires external pull-up; asserts for 200ms after VCC rise above 4.4V. |
| 16 RESET | Active-High Reset Output | Open-drain inverse of RESET; high-impedance when RESET is active; used for μPs requiring active-high reset. |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed RESET assertion to VCC = 1V | Ensures deterministic reset even during deep brownout, eliminating undefined μP states before full power collapse. |
| On-board CE signal gating (≤10ns delay) | Prevents erroneous writes to CMOS RAM/EEPROM during power transients without requiring external logic or layout changes. |
| MaxCap®/SuperCap-compatible backup | Supports large-value backup capacitors (e.g., 0.47F) with controlled switchover hysteresis (60mV) and low leakage (<1μA). |
| Selectable watchdog timeout (100ms / 1.6s) | Allows matching to firmware execution cycles via OSC SEL pin state, avoiding false resets in long-latency applications. |
| Independent power-fail comparator (PFI/PFO) | Enables early warning of supply degradation without affecting reset timing or watchdog behavior - critical for graceful shutdown. |
| VCC/VBATT switchover with BATT ON indicator | Provides real-time status of backup activation, simplifying diagnostics and enabling external pass transistor control for >250mA loads. |
Applications
| Industrial PLC Controller | Medical Diagnostic Instrument |
|---|---|
|
Use Scenario: Maintains volatile configuration memory and real-time clock during AC mains interruption or brownout. IC Role / Device Role / Timing Role: Supervisory circuit providing VCC/VBATT switchover, 200ms reset hold, and watchdog supervision of ARM Cortex-M4 firmware. Use Value: Prevents data corruption in EEPROM-backed parameter storage and ensures deterministic restart after power recovery. |
Use Scenario: Secures patient data buffers and sensor calibration registers during battery-switchover in portable ultrasound units. IC Role / Device Role / Timing Role: Dual-reset supervisor with ±2% PFI accuracy and 1.6s watchdog timeout aligned to image acquisition cycle. Use Value: Guarantees uninterrupted operation during hot-swap battery replacement and eliminates risk of corrupted DICOM metadata. |
| Telecom Base Station Management | Ruggedized Data Logger |
|
Use Scenario: Monitors 5V management rail in remote radio units exposed to wide temperature (-40°C to +85°C) and voltage fluctuation. IC Role / Device Role / Timing Role: Temperature-stable supervisory IC asserting RESET at 4.4V with <15mV hysteresis and 30μA quiescent current. Use Value: Extends backup runtime by minimizing battery drain while ensuring fail-safe reboot under telecom-grade power stress. |
Use Scenario: Preserves GPS timestamp and sensor readings during vehicle engine cranking events causing 12V system dips to 6V. IC Role / Device Role / Timing Role: Battery-backed supervisor using VBATT switchover and LOW LINE output to trigger pre-crash data capture. Use Value: Captures critical event data before power collapse, with no reliance on host processor responsiveness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX691AEPE+ | 4.65V reset threshold; no guaranteed ±2% PFI accuracy; identical pinout and package. | Suitable for systems where higher reset threshold improves noise immunity on noisy 5V rails. | Select when reset must trigger later in power-down sequence, e.g., to extend μP operational window before forced reset. |
| MAX800MEPE+ | Same 4.4V reset threshold and ±2% PFI accuracy; enhanced ESD rating (±8kV HBM vs. ±4kV for MAX693A). | Preferred in high-static environments like factory-floor test equipment or field-deployed sensors. | Choose for improved robustness in uncontrolled ESD environments without changing layout or firmware. |
Compared with MAX693AEPE+, MAX691AEPE+ offers higher reset threshold but lacks guaranteed power-fail accuracy, while MAX800MEPE+ adds ESD hardening and maintains identical timing and switchover behavior - making it a drop-in upgrade for reliability-critical deployments.
Availability
MAX693AEPE+ is available at Aetrix Electronics and suitable for industrial PLC controllers, medical diagnostic instruments, telecom base station management units, and ruggedized data loggers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX693AEPE+ 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 industrial, automotive, and communications applications, with emphasis on reliability and integration.
The MAX691A/MAX693A/MAX800L/MAX800M family delivers integrated power monitoring, reset generation, watchdog supervision, and battery switchover in single-chip solutions for mission-critical embedded systems.
FAQ
What is the guaranteed operating temperature range for MAX693AEPE+?
The MAX693AEPE+ is specified for -40°C to +85°C ambient operation, validated across electrical parameters including reset threshold (4.40V ±0.15V), supply current (30–100μA), and CE propagation delay (6–10ns). This range aligns with industrial-grade requirements and is confirmed in the device's ordering information table for the 'E' grade suffix.
Does MAX693AEPE+ support both active-high and active-low reset outputs simultaneously?
Yes, MAX693AEPE+ provides two independent reset outputs: pin 15 (RESET) is active-low open-drain, and pin 16 (RESET) is active-high open-drain. Both assert synchronously when VCC falls below 4.4V and remain asserted for 200ms after VCC rises above threshold - enabling direct interface with μPs requiring either polarity without external inverters.
How does the watchdog function behave when WDI is left unconnected on MAX693AEPE+?
When WDI (pin 11) is unconnected, MAX693AEPE+'s internal voltage divider biases it to ~1.6V, disabling the watchdog timer. WDO remains high, and no reset pulses are generated. This behavior is documented in the "Watchdog Input" section and verified across temperature; no external pull-up/down is required to disable watchdog functionality.
Can MAX693AEPE+ be used with a 3.3V main supply?
No - MAX693AEPE+ requires VCC between +4.5V and +5.5V per its Absolute Maximum Ratings and Electrical Characteristics tables. Operation below 4.5V violates the specified operating voltage range and risks improper reset assertion, CE gating, or switchover behavior. For 3.3V systems, consider the MAX6361 or MAX6326 families.
What is the maximum continuous output current supported by MAX693AEPE+ on the VOUT pin?
MAX693AEPE+ supports 250mA continuous current from VOUT when sourced from VCC, with VCC-to-VOUT on-resistance of 0.8–1.4Ω resulting in ≤200mV dropout. When powered from VBATT, continuous current is limited to 25mA due to higher 15–30Ω on-resistance - as specified in the Electrical Characteristics table under "VBATT-to-VOUT On-Resistance".
MAX693AEPE+ 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:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-PDIP
MAX693AEPE+ FAQ
1.How can I place an order for MAX693AEPE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX693AEPE+ 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 MAX693AEPE+ reliable?
The price and inventory of MAX693AEPE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX693AEPE+ is usually 5 days.
3.What payment methods are accepted for MAX693AEPE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX693AEPE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX693AEPE+?
MAX693AEPE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX693AEPE+ 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 MAX693AEPE+?
For technical support, including MAX693AEPE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX693AEPE+ requirements.
6.How does Aetrix verify that MAX693AEPE+ is sourced from the original manufacturer or authorized distributors?
All MAX693AEPE+ 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 MAX693AEPE+ meets industry standards.
7.What is the process for return or replacement of MAX693AEPE+?
All MAX693AEPE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX693AEPE+, 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 MAX693AEPE+ part is unused and in its original packaging.
Return procedure for MAX693AEPE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX693AEPE+ 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…
