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Analog Devices Inc./Maxim Integrated MAX700CSA+T
- Part No.:
- MAX700CSA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX700CSA+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,621
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Product details
Overview
MAX700CSA+T from Maxim Integrated is a precision power-supply supervisory circuit for +5V microprocessor systems, featuring factory-trimmed 4.65V reset threshold, adjustable-voltage detection via SENSE input (1.29V reference), adjustable hysteresis, debounced manual-reset input (MR), and guaranteed valid RESET output down to VCC = 1V. It operates in commercial temperature range (0°C to +70°C) and is used for reliable power-on/power-down reset generation in embedded controllers.
For engineers reviewing the MAX700CSA+T datasheet, MAX700CSA+T pinout, MAX700CSA+T application, or MAX700CSA+T equivalent, key selection criteria include its dual-mode monitoring (VCC or external SENSE), 200ms minimum reset pulse width, ±150mV reset threshold tolerance, 100µA typical supply current, and narrow-SO-8 package compatibility with lead-free assembly.
Technical Context
The MAX700CSA+T implements a precision bandgap-referenced comparator architecture with internal 1.29V reference for SENSE-based monitoring and fixed 4.65V threshold for VCC monitoring, selectable via CTL pin. Its reset logic guarantees active-low RESET and active-high RESET outputs remain valid during brownout (down to 1V VCC) and for ≥200ms after VCC recovery.
It integrates a 5µA internal MR pullup, HYST terminal with ~1kΩ on-resistance for noise-immune hysteresis tuning, and supports both fixed-threshold and resistor-divider–based voltage detection. The device requires no external timing components and delivers rail-to-rail reset assertion across 1.5V–15.5V VCC range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.65V ±150mV (factory-trimmed); ensures reliable reset activation at nominal +5V supply sag |
| SENSE Input Threshold | 1.29V ±40mV; enables precise external voltage monitoring using resistor dividers |
| Reset Pulse Width | 200–500ms; guarantees sufficient duration for µP initialization and peripheral stabilization |
| Supply Current | 100–200µA; enables low-power operation in battery-backed or energy-sensitive systems |
| VCC Operating Range | 1.5V to 15.5V; supports wide-input monitoring including 3.3V, 5V, and 12V rails |
| Hysteresis Control | Adjustable via HYST pin (typ. 1kΩ to GND); reduces false resets from supply noise or ripple |
| MR Input Threshold | 0.7V max; compatible with standard pushbutton switches and open-drain logic signals |
Pinout & Package
MAX700CSA+T is supplied in an 8-pin narrow-SO (SOIC-8) package, 3.9mm body width, 1.27mm pitch, RoHS-compliant and lead-free (indicated by '+' suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Manual Reset Input | Active-low debounced input with 5µA internal pullup; initiates reset when pulled below 0.7V |
| 2 SENSE | Voltage Sense Input | 1.29V reference comparator input; used for external voltage monitoring when CTL = VCC |
| 3 HYST | Hysteresis Control Terminal | Connects to GND via resistor to set hysteresis width; turns on 5µs before RESET assertion |
| 4 GND | Ground Reference | Primary return path for all internal circuits and reset outputs |
| 5 RESET | Active-Low Reset Output | Open-drain output sinking up to 16mA; asserts low during VCC undervoltage or MR activation |
| 6 RESET | Active-High Reset Output | Pullup-compatible output sourcing up to 3.2mA; complements RESET for mixed-logic systems |
| 7 CTL | Control Select Input | High = monitor SENSE; Low = monitor VCC; selects internal voltage-sensing path |
| 8 VCC | Power Supply Input | Supplies chip bias and serves as monitored rail when CTL = GND; rated -0.3V to +15.5V |
Key Features
| Feature | Design Value |
|---|---|
| Dual Monitoring Mode | Selectable VCC or external SENSE monitoring via CTL pin-enables flexible rail supervision without redesign |
| Adjustable Hysteresis | HYS terminal allows user-defined hysteresis width via external resistor-suppresses noise-induced false resets |
| Guaranteed Reset Validity | RESET/RESET outputs remain functional down to VCC = 1V-ensures robust behavior during deep brownouts |
| No External Timing Components | Internal RC timing eliminates need for capacitors or resistors-reduces BOM count and layout area |
| Debounced Manual Reset | Hardware-debounced MR input rejects contact bounce-eliminates firmware-level debounce overhead |
Applications
| Industrial PLC Controllers | Medical Diagnostic Instruments |
|---|---|
Use Scenario: Power sequencing and fault recovery in programmable logic controller modules operating in noisy factory environments. IC Role / Device Role / Timing Role: Supervisory circuit generating synchronized power-on reset and brownout detection for ARM Cortex-M7-based control cores. Use Value: 200ms minimum reset pulse ensures full FPGA configuration and watchdog initialization before code execution begins. | Use Scenario: Reliable boot-up and supply integrity monitoring in portable ultrasound imaging units with multi-rail power domains. IC Role / Device Role / Timing Role: Primary reset generator for 3.3V and 5V analog front-end and digital processing subsystems. Use Value: Adjustable SENSE threshold enables precise 3.3V rail monitoring independent of main 5V supply, improving system fault isolation. |
| Automotive Infotainment Head Units | Networked Smart Sensors |
Use Scenario: Cold-cranking resilience testing and ignition-cycle reset management in head unit mainboards. IC Role / Device Role / Timing Role: Voltage supervisor asserting reset during battery dip below 4.65V and recovering only after stable 5V restoration. Use Value: Factory-trimmed 4.65V threshold matches automotive 5V regulator tolerance bands, eliminating calibration effort. | Use Scenario: Power-fail detection and graceful shutdown in LoRaWAN edge sensors powered by coin cells or energy harvesters. IC Role / Device Role / Timing Role: Low-current (100µA) supervisor enabling long-term monitoring of 3.0V supply with manual reset override. Use Value: MR debouncing and 1V operational floor allow use with ultra-low-VCC backup supplies during main power loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power-supply monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326US29D3+T | Fixed 2.93V reset threshold; no SENSE/HYST pins; 3-pin SOT23 package | Single-rail, space-constrained designs requiring only basic reset-not suitable for dual-mode or adjustable-threshold use | Select when footprint and cost are prioritized over flexibility; not drop-in compatible |
| TPS3808G18DBVR | 1.8V fixed threshold; 200ms min reset pulse; 1.6µA quiescent current; no manual reset or hysteresis adjustment | Ultra-low-power battery systems where 1.8V rail supervision suffices and MR is unnecessary | Choose for sub-µA standby current; lacks SENSE interface and MR debouncing of MAX700CSA+T |
Compared with MAX6326US29D3+T and TPS3808G18DBVR, the MAX700CSA+T uniquely supports both VCC and external SENSE monitoring, adjustable hysteresis, and debounced manual reset-all in a standard SO-8 footprint-making it optimal for design reuse across multiple voltage rails and legacy +5V platforms.
Availability
MAX700CSA+T is available at Aetrix Electronics and suitable for industrial PLC controllers, medical diagnostic instruments, and automotive infotainment head units requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for MAX700CSA+T 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 high-performance analog, mixed-signal, and power-management ICs for industrial, communications, computing, and consumer applications.
The MAX700 series belongs to Maxim's supervisory circuit product line, engineered specifically for robust, low-component-count power monitoring in +5V microprocessor systems with emphasis on reset reliability, noise immunity, and design flexibility.
FAQ
What is the reset threshold voltage of the MAX700CSA+T?
The MAX700CSA+T has a factory-trimmed reset threshold of 4.65V with ±150mV tolerance over temperature (0°C to +70°C). This applies when monitoring VCC directly (CTL = GND). When configured for external sensing (CTL = VCC), the SENSE input threshold is 1.29V ±40mV, allowing custom voltage detection using resistor dividers. Both thresholds are guaranteed across the full operating range.
Does the MAX700CSA+T support manual reset functionality?
Yes, the MAX700CSA+T includes a dedicated MR (Manual Reset) pin (Pin 1) with built-in 5µA pullup current and hardware debouncing. Pulling MR below 0.7V initiates a full reset cycle, asserting both RESET and RESET outputs for ≥200ms. This eliminates the need for external RC networks or firmware-level debounce routines, simplifying system-level reset control in the MAX700CSA+T design.
Can the MAX700CSA+T monitor voltages other than +5V?
Yes, the MAX700CSA+T supports adjustable-voltage detection via its SENSE pin. When CTL is tied to VCC, the internal 1.29V reference compares against the divided-down external voltage. Using two external resistors, users can configure detection thresholds from 3V to 15V. This capability-documented in Figure 3 of the MAX700CSA+T datasheet-makes it suitable for multi-rail systems beyond standard +5V applications.
What is the minimum VCC voltage at which the MAX700CSA+T guarantees valid reset output?
The MAX700CSA+T guarantees correct RESET/RESET output states down to VCC = 1.0V (with 1mA sink load), per Figure 4 and Absolute Maximum Ratings. This ensures reliable reset assertion even during severe brownout conditions, supporting fail-safe behavior in critical systems. Operation below 1.5V is limited to reset output validity only; full specification compliance (e.g., supply current, timing) applies above 1.5V.
Is the MAX700CSA+T pin-compatible with other devices in the MAX700/MAX701/MAX702 family?
Yes, the MAX700CSA+T shares identical pinout and package (8-pin narrow-SO) with MAX701CSA and MAX702CSA. However, functional differences exist: MAX700CSA+T provides SENSE, HYST, and CTL pins for adjustable monitoring, while MAX701CSA adds RESET and MAX702CSA omits RESET and uses N.C. pins. Direct substitution requires verifying required features-e.g., MAX702CSA cannot replace MAX700CSA+T if SENSE-based monitoring is needed.
MAX700CSA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- Adjustable/Selectable
- Output:
- Push-Pull, Push-Pull
- Reset:
- Active High/Active Low
- Reset Timeout:
- 200ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX700CSA+T FAQ
1.How can I place an order for MAX700CSA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX700CSA+T 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 MAX700CSA+T reliable?
The price and inventory of MAX700CSA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX700CSA+T is usually 5 days.
3.What payment methods are accepted for MAX700CSA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX700CSA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX700CSA+T?
MAX700CSA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX700CSA+T 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 MAX700CSA+T?
For technical support, including MAX700CSA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX700CSA+T requirements.
6.How does Aetrix verify that MAX700CSA+T is sourced from the original manufacturer or authorized distributors?
All MAX700CSA+T 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 MAX700CSA+T meets industry standards.
7.What is the process for return or replacement of MAX700CSA+T?
All MAX700CSA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX700CSA+T, 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 MAX700CSA+T part is unused and in its original packaging.
Return procedure for MAX700CSA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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