My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX709SCSA
- Part No.:
- MAX709SCSA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX709SCSA.pdf
- Description:
- IC SUPERVISOR PWR SUP MON RESET
- Quantity:
- Payment:
- Shipping:
Inventory:29,550
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX709SCSA from Maxim Integrated is a precision power-supply monitor IC with active-low reset output, designed for +3V systems (2.93V nominal reset threshold), delivering 140ms minimum power-on reset delay, guaranteed RESET state down to VCC = 1V, and immunity to short negative VCC transients-used in microprocessor-based embedded controllers requiring reliable brownout detection.
For engineers reviewing the MAX709SCSA datasheet, MAX709SCSA pinout, MAX709SCSA application, or MAX709SCSA equivalent, this page provides verified package mapping (8-pin SO), confirmed reset timing behavior, validated supply current (35µA typ at 3.6V), and real-world interface guidance for µP reset pins and low-voltage operation.
Technical Context
The MAX709SCSA integrates a precision voltage comparator with hysteresis, internal reference, and a monostable timer to generate a clean, glitch-immune reset pulse during VCC transitions. Its reset threshold is fixed at 2.93V ±1.5%, with temperature coefficient of ±100ppm/°C over –40°C to +85°C.
It operates across VCC = 1.0V to 5.5V, sinks up to 1.2mA on RESET at VCC ≥ reset threshold min, and maintains functional reset assertion even as VCC drops to 1V-enabling robust system initialization in battery-backed or low-power wake-up scenarios.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V ±1.5% - ensures reliable detection of brownout in +3V systems before µP becomes unstable |
| Power-On Reset Delay | 140ms min - holds µP in reset long enough for power rails and clocks to stabilize |
| Supply Current | 35µA typ at 3.6V - enables use in always-on monitoring without significant battery drain |
| VCC Operating Range | 1.0V to 5.5V - supports operation down to near-dead-battery conditions for valid reset signaling |
| RESET Output Sink | 1.2mA at VCC = reset threshold min - drives standard CMOS/TTL reset inputs without external buffer |
| Transient Immunity | Rejects ≤40µs negative VCC glitches ≥100mV below threshold - prevents spurious resets in noisy environments |
| Temperature Range | –40°C to +85°C - qualified for industrial-grade embedded control and automotive body electronics |
Pinout & Package
MAX709SCSA is housed in an 8-pin SO (Small Outline) package, 150mil width, with gull-wing leads and JEDEC MS-012AC compliance. Pin 1 is top-left corner (notch/dot marked), pin 8 is top-right.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | N.C. | No internal connection - must be left floating or tied to GND; no routing required |
| 2 | VCC | Main supply input - connects to monitored +3V rail; requires 0.1µF bypass capacitor adjacent to pin |
| 3 | GND | Analog ground reference - shared return path for internal comparator and RESET driver |
| 4 | N.C. | No internal connection - must be left floating or tied to GND; no routing required |
| 5 | N.C. | No internal connection - must be left floating or tied to GND; no routing required |
| 6 | N.C. | No internal connection - must be left floating or tied to GND; no routing required |
| 7 | RESET | Active-low open-drain reset output - pulls low during VCC fault and for 140ms after recovery |
| 8 | N.C. | No internal connection - must be left floating or tied to GND; no routing required |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Integrates reference, comparator, and timing circuitry - eliminates discrete R/C network and reduces BOM count by ≥3 parts |
| +3V system optimized | 2.93V reset threshold matches typical +3V µP VDD tolerance - avoids false resets during nominal operation |
| Valid RESET down to VCC = 1V | Ensures deterministic reset state during deep brownout - critical for nonvolatile register retention and safe shutdown |
| Immunity to short VCC glitches | Rejects transients ≤40µs wide and ≥100mV below threshold - improves reliability in electrically noisy industrial environments |
| Low quiescent current | 35µA typical at 3.6V - extends battery life in portable or energy-harvesting applications without sacrificing supervision integrity |
Applications
| Industrial PLC I/O Modules | Smart Energy Meters |
|---|---|
Use Scenario: Power cycling due to grid fluctuations or backup battery switchover in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Power-supply monitor generating clean, timed reset pulse to ARM Cortex-M4 µP upon VCC dip below 2.93V. Use Value: Prevents firmware corruption and register misconfiguration during brownout by enforcing 140ms minimum reset hold time. |
Use Scenario: Intermittent AC mains loss followed by supercapacitor backup activation in revenue-grade metering units. IC Role / Device Role / Timing Role: Supervisory IC asserting RESET while VCC falls from 3.3V to 2.8V, then holding reset for 140ms after recovery. Use Value: Guarantees EEPROM write completion and RTC synchronization before µP resumes execution. |
| Medical Patient Monitor Front-End | Automotive Body Control Module (BCM) |
Use Scenario: Battery voltage sag during cold-cranking or accessory load surge in portable diagnostic devices. IC Role / Device Role / Timing Role: System supervisor detecting 3.0V rail collapse and issuing controlled reset to low-power MSP430 µC. Use Value: Eliminates erratic sensor sampling or display artifacts by ensuring full µP reset before reinitialization. |
Use Scenario: Load-dump transients and alternator ripple affecting 3.3V logic rail in door module ECUs. IC Role / Device Role / Timing Role: Voltage monitor rejecting ≤40µs negative spikes while asserting RESET during sustained undervoltage events. Use Value: Maintains functional safety integrity by preventing unintended actuator commands during electrical disturbances. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power-supply monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX706RCSA | Same 2.63V reset threshold, identical SO-8 package, but lacks manual reset input (MR pin not present) | Not suitable where external push-button reset initiation is required | Select MAX709SCSA when manual reset capability is unnecessary and cost-sensitive design favors minimal feature set |
| TPS3808G12DBVR | 2.93V threshold, 200ms reset timeout, 1.8–6V VCC range, but higher 12µA quiescent current and different pinout (RESET active-high) | Requires level-shifting or logic inversion for µP reset inputs expecting active-low signal | Choose MAX709SCSA for drop-in replacement in legacy +3V designs with existing active-low reset architecture and strict 140ms timing |
Compared with MAX706RCSA and TPS3808G12DBVR, the MAX709SCSA delivers precise 140ms reset hold time, guaranteed operation down to VCC = 1V, and zero external component requirement-making it optimal for cost-constrained, space-limited industrial and medical systems where timing fidelity and ultra-low power are critical.
Availability
MAX709SCSA is available at Aetrix Electronics and suitable for industrial PLC I/O modules, smart energy meters, medical patient monitors, and automotive body control modules requiring stable component supply and long-term lifecycle support.
Supply support for MAX709SCSA 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, communications, and consumer applications.
The MAX709SCSA belongs to Maxim's µP supervisory circuit family, engineered specifically to replace discrete reset solutions in cost-sensitive, space-constrained embedded systems powered by +3V, +3.3V, or +5V rails.
FAQ
What is the exact reset threshold voltage of the MAX709SCSA?
The MAX709SCSA has a nominal reset threshold of 2.93V, with a guaranteed tolerance of ±1.5% (2.85V to 3.00V) over the full operating temperature range of –40°C to +85°C. This value is factory-trimmed and specified in the Electrical Characteristics table of the official MAX709 datasheet. The 'S' suffix in MAX709SCSA explicitly denotes the 2.93V version.
Does the MAX709SCSA require external components to function?
No, the MAX709SCSA requires no external components for basic reset functionality. It integrates an internal voltage reference, comparator, and timing circuitry. A 0.1µF ceramic bypass capacitor is recommended at the VCC pin for noise immunity, but this is not mandatory for core operation. The MAX709SCSA achieves full supervision with zero resistors or capacitors beyond that single decoupling cap.
Can the MAX709SCSA operate reliably when VCC drops below 2.0V?
Yes-the MAX709SCSA guarantees correct RESET output state down to VCC = 1.0V. Below 1.0V, the RESET output becomes high-impedance (open-drain), but between 1.0V and the 2.93V threshold, it actively pulls low during undervoltage. This behavior is explicitly tested and documented in the Absolute Maximum Ratings and Electrical Characteristics sections of the MAX709 datasheet.
What is the power-on reset delay of the MAX709SCSA, and is it adjustable?
The MAX709SCSA provides a fixed 140ms minimum power-on reset delay after VCC rises above the 2.93V threshold. This delay is internally generated and not user-adjustable. It is guaranteed over temperature and supply voltage, with typical values ranging from 140ms to 280ms and maximum up to 560ms per the datasheet's Electrical Characteristics table.
Is the MAX709SCSA pin-compatible with other MAX709 variants like MAX709LCSA or MAX709RCSA?
Yes-all MAX709 variants (including MAX709SCSA, MAX709LCSA, and MAX709RCSA) share identical 8-pin SO packaging, pinout, and electrical interface. Only the reset threshold voltage differs (2.93V vs. 4.65V vs. 2.63V). No PCB layout changes are needed when substituting between these versions, provided the target system's supply rail matches the selected threshold.
MAX709SCSA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.93V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX709SCSA FAQ
1.How can I place an order for MAX709SCSA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX709SCSA 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 MAX709SCSA reliable?
The price and inventory of MAX709SCSA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX709SCSA is usually 5 days.
3.What payment methods are accepted for MAX709SCSA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX709SCSA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX709SCSA?
MAX709SCSA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX709SCSA 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 MAX709SCSA?
For technical support, including MAX709SCSA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX709SCSA requirements.
6.How does Aetrix verify that MAX709SCSA is sourced from the original manufacturer or authorized distributors?
All MAX709SCSA 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 MAX709SCSA meets industry standards.
7.What is the process for return or replacement of MAX709SCSA?
All MAX709SCSA units undergo pre-shipment inspection (PSI). If there is an issue with MAX709SCSA, 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 MAX709SCSA part is unused and in its original packaging.
Return procedure for MAX709SCSA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX709SCSA 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…
