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Analog Devices Inc./Maxim Integrated MAX795SESA+T
- Part No.:
- MAX795SESA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX795SESA+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,792
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Product details
Overview
MAX795SESA+T from Maxim Integrated is an 8-pin SO microprocessor supervisory circuit for +3.0V/+3.3V systems, providing precision reset assertion (2.85V–3.00V threshold), backup-battery switchover (VBATT > VCC supported), chip-enable gating with ≤7ns propagation delay, and guaranteed reset assertion down to VCC = 1V. It is used in portable controllers and embedded systems requiring reliable power monitoring during brownout or battery-backup transitions.
For engineers reviewing the MAX795SESA+T datasheet, MAX795SESA+T pinout, MAX795SESA+T application, or MAX795SESA+T equivalent, key selection criteria include its fixed S-suffix reset threshold (2.85V–3.00V), battery-switching capability with VSW = 2.41V (VCC falling), CE IN-to-CE OUT propagation delay ≤7ns, and operation over 0°C to +70°C in narrow SO package.
Technical Context
The MAX795SESA+T implements a precision voltage-monitoring comparator with 10mV typical hysteresis to prevent oscillation during VCC transitions near the reset threshold. Its internal p-channel MOSFET switch enables seamless switchover between VCC and VBATT when VCC falls below VSW (2.41V typ, VCC falling) or rises above VRST (2.85V min).
It integrates a low-latency CE signal gating path with <7ns propagation delay and supports manual reset via MR input with 70µA internal pullup and 200ms timeout. Unlike the MAX793/MAX794, it omits watchdog timer, BATT OK output, and PFI comparator - confirming its role as a streamlined, cost-optimized supervisory IC for space-constrained 3V/3.3V applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.85V to 3.00V (S-suffix); ensures reset assertion before 3.3V supply drops below system-safe margin |
| Battery Switch Threshold (VCC falling) | 2.41V typical; triggers switchover to backup battery before VCC reaches reset level |
| CE IN-to-CE OUT Propagation Delay | ≤7ns max; preserves timing integrity of memory access signals during undervoltage events |
| Operating Temperature Range | 0°C to +70°C; suitable for commercial-grade embedded controllers and portable equipment |
| VCC Supply Current | 46µA typical (VCC = 3.3V); enables low-quiescent-power operation in battery-backed systems |
| Reset Timeout Period | 200ms minimum; guarantees sufficient processor initialization time after power recovery |
| Package | 8-pin narrow SO; 3.9mm × 4.9mm footprint compatible with high-density PCB layouts |
Pinout & Package
MAX795SESA+T is housed in an 8-pin narrow SO (Small Outline) package with 1.27mm pitch, JEDEC MS-012AC compliant, moisture sensitivity level 1, and RoHS-compliant lead-free finish (+T suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 OUT | Supply Output | Switched output connected to VCC or BATT; powers CMOS RAM during normal/battery modes |
| 2 VCC | Main Supply Input | +3.0V/+3.3V primary power rail; monitored for reset generation and CE gating control |
| 3 GND | Ground Reference | Common return path for all analog and digital functions; required for accurate voltage monitoring |
| 4 PFI | Power-Fail Comparator Input | Unused in MAX795; must be tied to VCC per datasheet to disable comparator function |
| 5 BATT ON | Battery-Switch Status Output | Active-high logic signal indicating current source is BATT; drives external PMOS gate for >75mA loads |
| 6 CE IN | Chip-Enable Input | Accepts system CE signal; gated internally during reset to prevent RAM corruption |
| 7 CE OUT | Chip-Enable Output | Pass-through or disabled CE signal; ≤7ns delay ensures synchronous memory interface timing |
| 8 MR | Manual Reset Input | Active-low input with 70µA internal pullup; initiates 200ms reset pulse on logic-low assertion |
Key Features
| Feature | Design Value |
|---|---|
| Fixed Reset Threshold (S-suffix) | 2.85V–3.00V range optimized for 3.3V ±10% supplies; eliminates external resistor divider complexity |
| Backup-Battery Switchover | Supports VBATT up to 6.0V exceeding VCC; enables use of standard 3.6V lithium coin cells without level-shifting |
| Chip-Enable Gating | Sub-7ns CE IN-to-CE OUT propagation ensures compatibility with fast microprocessors and avoids memory write errors |
| Guaranteed Reset to VCC = 1V | Ensures robust reset assertion during deep brownout or slow power-down sequences where VCC decays below 2V |
| Low Quiescent Current | 46µA typical supply current at 3.3V enables multi-year battery life in always-on backup applications |
Applications
| Portable Medical Monitors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered ECG or glucose meter maintaining real-time sensor data during AC power loss. IC Role / Device Role / Timing Role: Supervisory IC asserting reset and switching RAM supply to backup battery within 2.41V VCC drop threshold. Use Value: Prevents data corruption in SRAM during 100ms–500ms AC outage by guaranteeing CE gating and clean reset at VCC = 2.41V. | Use Scenario: DIN-rail mounted I/O module retaining configuration and process state during factory line voltage dips. IC Role / Device Role / Timing Role: Voltage monitor and CE gate controlling access to nonvolatile configuration EEPROM during undervoltage. Use Value: Eliminates need for external power-fail interrupt logic; 200ms reset timeout aligns with PLC boot sequence requirements. |
| Smart Energy Meters | Point-of-Sale Terminals |
Use Scenario: Revenue-grade meter logging kWh data during grid instability or tamper-induced power interruption. IC Role / Device Role / Timing Role: Backup power supervisor enabling seamless transition to supercapacitor or coin-cell backup on VCC sag. Use Value: 2.85V reset threshold matches EN 50470-3 voltage sag immunity requirements; BATT ON output drives external PMOS for >100mA load. | Use Scenario: Retail terminal preserving transaction buffer and secure key storage during brief UPS switchover. IC Role / Device Role / Timing Role: Dual-role supervisor: reset generator and CE gate protecting flash memory writes during power transition. Use Value: ≤7ns CE propagation prevents partial-write corruption in NAND flash; MR input supports cashier-initiated hard reset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX793SESA+ | 16-pin SO; includes watchdog timer, PFI comparator, BATT OK output, and LOWLINE warning - not present in MAX795SESA+T | Suitable for systems requiring early power-fail warning (LOWLINE) and autonomous watchdog reset; adds 8 pins and higher BOM cost | Select MAX793SESA+ only if watchdog or dual-voltage monitoring is required; otherwise MAX795SESA+T offers smaller footprint and lower cost |
| TPS3808G33DBVR | TI part with 3.3V fixed reset threshold (3.08V), 350ms timeout, no battery switchover or CE gating; SOT-23-6 package | Applicable where only basic reset supervision is needed; lacks backup power management and memory protection features | Choose TPS3808G33DBVR for ultra-compact, low-cost reset-only applications; avoid when battery backup or CE gating is mandatory |
Compared with MAX793SESA+, MAX795SESA+T reduces pin count and feature set to optimize size and cost for dedicated battery-switchover applications; versus TPS3808G33DBVR, it delivers integrated power-path control and memory interface protection unavailable in basic reset ICs.
Availability
MAX795SESA+T is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLC I/O modules, smart energy meters, and point-of-sale terminals requiring stable component supply across commercial temperature ranges.
Supply support for MAX795SESA+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 precision analog, mixed-signal, and power-management ICs for industrial, computing, and communications applications.
The MAX793/MAX794/MAX795 family was engineered specifically for 3.0V/3.3V microprocessor supervision - delivering integrated reset, battery switchover, and CE gating in minimal footprint packages for space- and power-constrained embedded systems.
FAQ
What is the exact reset threshold voltage range for MAX795SESA+T?
The MAX795SESA+T has an S-suffix reset threshold of 2.85V to 3.00V (VCC falling), with typical trip point at 2.925V. This range is factory-trimmed and guaranteed across 0°C to +70°C. The threshold is fixed and does not require external resistors - unlike the adjustable MAX794 - making MAX795SESA+T ideal for deterministic 3.3V ±10% supply monitoring.
Does MAX795SESA+T support backup battery voltage higher than VCC?
Yes, MAX795SESA+T explicitly supports VBATT > VCC, up to +6.0V absolute maximum. Its internal p-channel MOSFET switch allows direct connection of 3.6V lithium batteries to the BATT pin while VCC operates at 3.0V or 3.3V. The battery switchover occurs at VSW = 2.41V (typ, VCC falling), ensuring uninterrupted RAM power before reset assertion.
What is the function of the BATT ON pin on MAX795SESA+T?
The BATT ON pin on MAX795SESA+T is an active-high logic output that goes high when the internal switch connects OUT to the BATT supply (i.e., during battery-backup mode). It is designed to drive the gate of an external PMOS transistor, enabling >75mA backup current delivery beyond the IC's internal switch capability - a critical feature for powering larger RAM arrays or real-time clocks.
Can MAX795SESA+T be used without a backup battery?
Yes, MAX795SESA+T operates fully without a backup battery. Per the datasheet, connecting VCC, OUT, and BATT together disables battery switchover functionality while retaining all other features - including reset generation, CE gating, and MR input. In this configuration, OUT remains tied to VCC, and BATT ON stays low, simplifying design for non-battery applications.
What is the maximum capacitive load supported on CE OUT of MAX795SESA+T?
The CE OUT pin of MAX795SESA+T is characterized with a 50pF load capacitance during propagation delay testing. While not explicitly rated for higher loads, design guidelines recommend keeping total CE OUT load ≤50pF to maintain ≤7ns propagation delay and avoid timing violations in high-speed microprocessor interfaces. For heavier loads, buffer amplification is advised.
MAX795SESA+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:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.925V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX795SESA+T FAQ
1.How can I place an order for MAX795SESA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX795SESA+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 MAX795SESA+T reliable?
The price and inventory of MAX795SESA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX795SESA+T is usually 5 days.
3.What payment methods are accepted for MAX795SESA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX795SESA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX795SESA+T?
MAX795SESA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX795SESA+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 MAX795SESA+T?
For technical support, including MAX795SESA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX795SESA+T requirements.
6.How does Aetrix verify that MAX795SESA+T is sourced from the original manufacturer or authorized distributors?
All MAX795SESA+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 MAX795SESA+T meets industry standards.
7.What is the process for return or replacement of MAX795SESA+T?
All MAX795SESA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX795SESA+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 MAX795SESA+T part is unused and in its original packaging.
Return procedure for MAX795SESA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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