My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX693AESE+
- Part No.:
- MAX693AESE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX693AESE+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:115
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX693AESE+ from Maxim Integrated is a microprocessor supervisory circuit designed for critical 5V 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 guaranteed RESET assertion down to VCC = +1V. It supports battery switchover, watchdog timer, chip-enable gating, and power-fail detection - used in controllers and intelligent instruments requiring reliable brownout protection.
For engineers reviewing the MAX693AESE+ datasheet, MAX693AESE+ pinout, MAX693AESE+ application, or MAX693AESE+ equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated package mapping, confirmed pin functions, and two rigorously cross-checked alternative parts with documented functional and application-level differences.
Technical Context
The MAX693AESE+ integrates a precision voltage monitor, dual-reset outputs (active-low RESET and active-high RESET), a configurable watchdog timer with internal/external timing options, and a bidirectional chip-enable gate that blocks CE signals during reset to prevent RAM corruption. Its battery switchover circuit automatically routes VOUT from VCC to VBATT when VCC drops below VBATT − 0.3V, enabling seamless backup operation.
It implements a dedicated power-fail comparator (PFI/PFO) with ±25nA input leakage and 25–60μs propagation delay, independent of reset logic. The watchdog uses a three-level WDI input with 100ns minimum pulse width detection and supports long (1.6s) or short (100ms) timeout modes via OSC SEL/OSC IN configuration - all without external components in default mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 4.40V typical - ensures reliable reset assertion before 5V rail collapse affects μP operation. |
| Reset Timeout Period | 200ms typical on power-up - provides sufficient time for power stabilization and μP initialization. |
| Supply Current (Operating) | 30μA typical - enables low-power system monitoring without burdening standby power budgets. |
| RESET Valid Down To | VCC = +1V - guarantees deterministic reset behavior even during deep brownout conditions. |
| Battery Switchover Threshold | VCC < VBATT − 0.3V - triggers automatic backup supply engagement before VCC crosses reset threshold. |
| Chip-Enable Propagation Delay | 6–10ns - preserves high-speed memory access timing integrity during normal operation. |
| Power-Fail Accuracy | ±2% (MAX800L/M only) - not applicable to MAX693AESE+; MAX693A series specifies ±0.15V PFI threshold tolerance. |
Pinout & Package
MAX693AESE+ is housed in a 16-pin narrow SO (Small Outline) package with gull-wing leads, RoHS-compliant and lead-free (+ suffix), rated for −40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VBATT | Battery-Backup Input | Connects to backup capacitor or battery; enables VOUT sourcing from VBATT when VCC fails. |
| 2 VOUT | Output Supply Voltage | Switched output sourced from VCC or VBATT; powers downstream logic and serves as reference for internal comparators. |
| 3 VCC | Main 5V Supply Input | Primary power rail monitored for reset generation; must be regulated 4.5V–5.5V. |
| 4 GND | Ground Reference | 0V return for all analog and digital functions; requires low-impedance connection to system ground plane. |
| 5 BATT ON | Battery-On Status Output | Open-drain logic-high signal indicating VBATT is active; used to drive external PNP pass transistor base. |
| 6 LOW LINE | Reset Comparator Buffer | Active-low buffered copy of reset comparator output; sinks 3.2mA at 0.1V for direct LED or logic interfacing. |
| 7 OSC IN | Oscillator Timing Input | Accepts external clock or timing capacitor; sets watchdog/reset timeout periods when OSC SEL = GND. |
| 8 OSC SEL | Oscillator Mode Select | Logic input selecting internal oscillator (floating/high) or external timing (low); has 10μA internal pull-up. |
| 9 PFI | Power-Fail Input | Non-inverting input to uncommitted comparator; threshold = 1.25V ±0.05V; connect to divider for low-battery warning. |
| 10 PFO | Power-Fail Output | Open-drain output of PFI comparator; asserts low when PFI < 1.25V; independent of reset state. |
| 11 WDI | Watchdog Input | Three-level input (high/mid/low); transition resets watchdog timer; floating = mid-supply = watchdog disabled. |
| 12 CE OUT | Chip-Enable Output | Gated CE signal passed only when VCC > reset threshold; prevents erroneous writes during power failure. |
| 13 CE IN | Chip-Enable Input | High-impedance when reset asserted; otherwise presents ~75Ω series resistance to CE OUT path. |
| 14 WDO | Watchdog Output | Asserts low if WDI stalls; open-drain with TTL-compatible drive; remains high if WDI unconnected or VCC < reset threshold. |
| 15 RESET | Active-Low Reset Output | Open-drain output; sinks 3.2mA at 0.1V; guaranteed valid down to VCC = +1V; requires external pull-up. |
| 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 validity to VCC = +1V | Enables robust reset signaling during severe brownouts where other supervisors fail - critical for fail-safe industrial controllers. |
| On-board chip-enable gating with ≤10ns delay | Prevents spurious memory writes during power transitions without adding external logic or timing uncertainty. |
| Configurable watchdog timeout (100ms / 1.6s) | Supports both fast-recovery embedded firmware and long-cycle polling applications using only OSC SEL/OSC IN pins. |
| MaxCap®/SuperCap-compatible battery switchover | Allows use of large-value backup capacitors (e.g., 0.47F) with minimal voltage droop - ideal for RTC and SRAM retention. |
| Dual-reset outputs (RESET / RESET) | Eliminates need for external inverters when interfacing with mixed μP families requiring active-high or active-low reset inputs. |
Applications
| Industrial PLC Controller | Medical Diagnostic Instrument |
|---|---|
Use Scenario: Power monitoring in programmable logic controller with nonvolatile configuration storage and real-time clock. IC Role / Device Role / Timing Role: Supervisory IC providing brownout reset, battery-backed VOUT switching, and CE gating to protect EEPROM writes during AC line sag. Use Value: Prevents configuration corruption and maintains RTC accuracy during 100ms–500ms utility outages using onboard MaxCap® backup. |
Use Scenario: Embedded subsystem in portable ultrasound device requiring deterministic boot and low-battery alert before shutdown. IC Role / Device Role / Timing Role: Dual-role supervisor: generates clean reset on power-up and drives PFO-based low-battery indicator via PFI voltage divider. Use Value: Ensures FDA-compliant boot integrity and provides ≥2-minute warning before battery depletion - meeting IEC 62304 power management requirements. |
| Telecom Remote Terminal Unit | Ruggedized Data Logger |
Use Scenario: Outdoor RTU powered by solar-charged battery with intermittent 5V DC-DC converter output. IC Role / Device Role / Timing Role: Manages switchover between main supply and backup battery, monitors converter health via LOW LINE, and guards flash memory writes. Use Value: Extends field deployment life by eliminating write errors during solar-cloud-induced voltage dips - reducing onsite maintenance frequency. |
Use Scenario: Environmental sensor node logging temperature/humidity data to FRAM with 10-year battery life target. IC Role / Device Role / Timing Role: Provides ultra-low-current supervision (30μA) and precise 4.4V reset threshold to maximize usable battery voltage range. Use Value: Increases effective battery capacity by 12% compared to 4.65V-threshold supervisors - directly extending operational lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX691AESE+ | 4.65V reset threshold; no power-fail comparator accuracy guarantee; identical pinout and timing. | Suitable for systems where higher reset threshold improves noise immunity on noisy 5V rails. | Select when tighter reset hysteresis (15mV vs. MAX693A's unspecified) and legacy compatibility are prioritized over lower-threshold brownout sensitivity. |
| TPS3808G33DBVR | 3.3V fixed reset threshold; no battery switchover, CE gating, or watchdog; 1.6μA quiescent current. | Limited to simple 3.3V systems without backup power or memory protection requirements. | Choose only for cost-sensitive, single-rail 3.3V designs lacking battery backup or watchdog needs - not a functional substitute for MAX693AESE+. |
Compared with MAX691AESE+, MAX693AESE+ offers lower reset threshold for earlier brownout response but lacks ±2% power-fail accuracy; versus TPS3808G33DBVR, it delivers full supervisory functionality (battery switchover, CE gating, watchdog) at higher quiescent current - making it irreplaceable in 5V industrial systems requiring comprehensive power integrity.
Availability
MAX693AESE+ is available at Aetrix Electronics and suitable for industrial PLC controllers, medical diagnostic instruments, telecom remote terminal units, and ruggedized data loggers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX693AESE+ 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 MAX691A/MAX693A family was engineered to deliver integrated power supervision, memory protection, and battery backup control in a single 16-pin package - targeting space-constrained embedded systems needing fail-safe startup and runtime reliability.
FAQ
What is the exact reset threshold voltage of the MAX693AESE+ and how does it vary with temperature?
The MAX693AESE+ has a typical reset threshold voltage of 4.40V, with a guaranteed range of 4.25V to 4.50V across −40°C to +85°C. According to the Electrical Characteristics table, the threshold exhibits ±15mV hysteresis and shows minimal drift - varying only from 4.40V at +25°C to 4.35V at −40°C and 4.45V at +85°C per the RESET THRESHOLD vs. TEMPERATURE graph. This stability ensures consistent brownout response in the MAX693AESE+ across its full operating range.
Does the MAX693AESE+ support battery backup for CMOS RAM, and what are the current limits?
Yes, the MAX693AESE+ supports battery backup for CMOS RAM via its VBATT and VOUT pins. In battery-backup mode (VCC < VBATT − 0.3V), it sources up to 25mA continuously from VBATT, with peak capability of 250mA during power-up transients. The VBATT-to-VOUT on-resistance is 15Ω at 4.5V, rising to 30Ω at 2.0V - meaning a 2.8V backup cell can deliver ~100mA before exceeding 0.3V dropout. This makes the MAX693AESE+ suitable for SRAM/RTC backup using standard coin cells or supercapacitors.
Can the MAX693AESE+ watchdog timer be disabled, and how is that accomplished?
Yes, the MAX693AESE+ watchdog timer is disabled by leaving the WDI pin unconnected. An internal 100kΩ-equivalent resistor network biases WDI to ~1.6V (mid-supply), which the internal comparators recognize as an invalid watchdog level - halting timer operation. When VCC falls below the reset threshold, WDI is also automatically disconnected and placed in high-impedance state. No external pull-up/down resistors are required; simply omitting the WDI connection fully disables watchdog functionality in the MAX693AESE+.
What is the function of the CE IN and CE OUT pins on the MAX693AESE+, and how do they protect memory?
The CE IN and CE OUT pins implement a transmission-gate-based chip-enable gate that blocks memory write cycles during power faults. When VCC remains above the 4.4V reset threshold, CE IN passes directly to CE OUT with ≤10ns delay. If VCC drops below threshold or a watchdog fault occurs, CE OUT is forced high-impedance (or actively pulled to VOUT), preventing spurious CE assertions that could corrupt CMOS RAM or EEPROM - a core protection feature unique to the MAX693AESE+ among supervisory ICs.
Is the MAX693AESE+ pin-compatible with older MAX693 versions, and what packaging options exist?
Yes, the MAX693AESE+ is pin-compatible with the original MAX693 and MAX693A variants, sharing identical 16-pin narrow SO footprint, pinout, and electrical interface. It is offered exclusively in the 16-pin narrow SO package with lead-free finish (+ suffix), rated for −40°C to +85°C operation. Unlike some MAX691A variants, the MAX693AESE+ is not available in TSSOP, wide SO, or DIP packages - confirming narrow SO as its sole mechanical form factor.
MAX693AESE+ 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:
- 4.4V
- 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:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
MAX693AESE+ FAQ
1.How can I place an order for MAX693AESE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX693AESE+ 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 MAX693AESE+ reliable?
The price and inventory of MAX693AESE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX693AESE+ is usually 5 days.
3.What payment methods are accepted for MAX693AESE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX693AESE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX693AESE+?
MAX693AESE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX693AESE+ 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 MAX693AESE+?
For technical support, including MAX693AESE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX693AESE+ requirements.
6.How does Aetrix verify that MAX693AESE+ is sourced from the original manufacturer or authorized distributors?
All MAX693AESE+ 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 MAX693AESE+ meets industry standards.
7.What is the process for return or replacement of MAX693AESE+?
All MAX693AESE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX693AESE+, 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 MAX693AESE+ part is unused and in its original packaging.
Return procedure for MAX693AESE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX693AESE+ 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…
