My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX709TCPA+
- Part No.:
- MAX709TCPA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- -
- Datasheet:
-
MAX709TCPA+.pdf
- Description:
- IC PS MONITOR 3.08V RESET 8-DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,715
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX709TCPA+ from Maxim Integrated is a precision power-supply monitor IC with active-low reset output, designed for +3.3V and +3V systems. It asserts RESET when VCC falls below 3.08V (±2% tolerance), holds reset for ≥140ms after VCC recovers, operates down to 1V supply, and draws only 35µA typical supply current. It is used in microprocessor-based embedded systems requiring reliable power-on/power-down supervision.
For engineers reviewing the MAX709TCPA+ datasheet, MAX709TCPA+ pinout, MAX709TCPA+ application, or MAX709TCPA+ equivalent, key selection criteria include reset threshold accuracy (3.08V), guaranteed reset assertion at VCC ≥1V, 140ms minimum reset timeout, immunity to short negative VCC transients, and compatibility with 8-pin DIP, SO, and µMAX packages.
Technical Context
The MAX709TCPA+ integrates a precision voltage comparator with hysteresis and an internal timer to generate a clean, glitch-immune reset signal. Its reset threshold is factory-trimmed to 3.08V (T-suffix), with ±2% initial accuracy and <0.0003%/°C temperature drift, enabling stable operation across -40°C to +85°C.
It features open-drain RESET output capable of sinking 1.2mA at VCC = reset threshold min, supports bidirectional µP reset pins via external 4.7kΩ series resistor, and maintains valid logic state during brownout without external components-eliminating need for RC timing networks or discrete comparators.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VTH Reset Threshold | 3.08V ±2% - ensures reliable reset activation in +3.3V/+3V systems before critical logic fails |
| Reset Timeout | 140ms min - guarantees sufficient hold time for µP initialization and memory stabilization |
| Supply Voltage Range | 1.0V to 5.5V - enables valid RESET assertion even during deep brownout down to 1V |
| Supply Current | 35µA typ - minimizes quiescent power impact in battery-backed or low-power systems |
| RESET Output Type | Open-drain - allows wired-OR configuration and level translation with external pull-up |
| Operating Temp | -40°C to +85°C - qualified for industrial and extended-temperature embedded applications |
| Transient Immunity | Immune to ≤40µs negative VCC glitches 100mV below threshold - prevents false resets from noise |
Pinout & Package
MAX709TCPA+ is supplied in an 8-pin plastic DIP package (0.300" wide) with lead-free finish (+ suffix). Pin 1 is top-left corner (notch side), pin numbering counterclockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 5, 6, 8 | No Connect (N.C.) | No internal connection - must be left unconnected or tied to GND per layout best practice |
| 2 | VCC | Main supply input - powers internal comparator and timer; requires 0.1µF bypass capacitor adjacent to pin |
| 3 | GND | Analog/digital ground reference - must be connected to system ground plane with low-inductance path |
| 7 | RESET | Active-low open-drain reset output - sinks current during fault; requires external pull-up to VCC or logic rail |
Key Features
| Feature | Design Value |
|---|---|
| Precision 3.08V reset threshold | Factory-trimmed ±2% accuracy ensures consistent trip point across production lots and temperature |
| 140ms minimum reset timeout | Guaranteed hold time eliminates need for external RC timing network or manual delay calibration |
| Operation down to VCC = 1V | RESET remains asserted and valid until supply recovers above threshold - no undefined state at low VCC |
| 35µA typical supply current | Enables use in always-on supervisory circuits without compromising system standby power budget |
| Immunity to short VCC transients | Rejects ≤40µs negative glitches 100mV below threshold - improves robustness in noisy power environments |
Applications
| Industrial PLC Controller | Medical Diagnostic Handheld |
|---|---|
Use Scenario: Power cycling during field firmware updates and sensor calibration sequences. IC Role / Device Role / Timing Role: Supervisory IC generating clean, timed reset pulse to ensure deterministic µP boot sequence after power interruption. Use Value: Prevents corrupted register states and flash write errors by guaranteeing ≥140ms reset hold time independent of input rail slew rate. | Use Scenario: Battery-powered operation with frequent AC adapter swaps and low-battery brownout events. IC Role / Device Role / Timing Role: Low-voltage supervisor asserting RESET before Li-ion cell drops below 3.0V cutoff, enabling graceful shutdown. Use Value: 3.08V threshold aligns precisely with common 3.3V LDO dropout and battery protection thresholds. |
| Automotive Infotainment Head Unit | Smart Energy Meter |
Use Scenario: Cold-cranking and alternator load-dump transients causing temporary VCC sag. IC Role / Device Role / Timing Role: Brownout detector immune to ≤40µs negative VCC glitches, preventing spurious resets during engine start. Use Value: Eliminates need for additional filtering or transient suppressors on main 3.3V rail. | Use Scenario: Mains-powered meter with supercapacitor backup sustaining RTC and nonvolatile registers during outages. IC Role / Device Role / Timing Role: Supervisor monitoring primary 3.3V rail and triggering backup switchover before critical data loss. Use Value: Valid RESET output down to VCC = 1V ensures controlled handoff to backup power without metastability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power-supply monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX706TCSA+ | Same 3.08V threshold, 140ms timeout, but SO-8 package and -40°C to +85°C rating | Preferred for surface-mount PCBs requiring smaller footprint and wider temp range | Select MAX706TCSA+ when board space is constrained and industrial temp range is mandatory |
| TLV809E30DBZR | 3.0V threshold (±1%), 140ms timeout, 1.8–6V VCC range, 0.5µA IQ, SOT-23-3 | Ultra-low-power, single-supply, minimal footprint - lacks N.C. pins and transient immunity specs | Select TLV809E30DBZR only for battery-critical designs where 35µA vs. 0.5µA matters and transient immunity is secondary |
Compared with MAX709TCPA+, MAX706TCSA+ offers identical electrical behavior in a smaller SO-8 package with extended temperature range, while TLV809E30DBZR trades robustness and feature set for ultra-low quiescent current and minimal size - choice depends on priority between industrial reliability versus battery life and board area.
Availability
MAX709TCPA+ is available at Aetrix Electronics and suitable for industrial control systems, medical handheld devices, automotive infotainment units, and smart energy meters requiring stable component supply and long-term lifecycle support.
Supply support for MAX709TCPA+ 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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and consumer applications.
The MAX709TCPA+ belongs to Maxim's µP supervisory circuit product line, engineered specifically to replace discrete reset solutions in cost-sensitive, space-constrained embedded systems operating at +3.3V and +3V rails.
FAQ
What is the exact reset threshold voltage of the MAX709TCPA+?
The MAX709TCPA+ has a nominal reset threshold voltage of 3.08V, with ±2% initial accuracy over temperature. This value is factory-trimmed and specified in the Electrical Characteristics table under "RESET Threshold, VTH" for suffix T. The threshold remains stable across the full -40°C to +85°C operating range, with normalized drift <0.0003%/°C.
Does the MAX709TCPA+ require external components to function?
No, the MAX709TCPA+ requires no external components for basic reset functionality. A 0.1µF ceramic bypass capacitor on VCC (pin 2) is recommended for noise immunity but not strictly required for operation. Unlike RC-based supervisors, the MAX709TCPA+ integrates both precision voltage detection and timing circuitry internally.
Can the MAX709TCPA+ drive a microprocessor reset pin directly?
Yes - the MAX709TCPA+ RESET output (pin 7) is an open-drain driver capable of sinking up to 1.2mA at VCC = reset threshold minimum. It can directly drive most µP reset inputs when paired with an appropriate external pull-up resistor (typically 10kΩ to VCC). For bidirectional µP reset pins (e.g., Motorola 68HC11), a 4.7kΩ series resistor is recommended to prevent contention.
What is the minimum supply voltage at which the MAX709TCPA+ guarantees correct RESET state?
The MAX709TCPA+ guarantees correct RESET output state down to VCC = 1.0V. Below 1V, the RESET output becomes high-impedance (open-circuit) rather than undefined - ensuring no false release of reset during deep brownout. This behavior is explicitly characterized and guaranteed in the Absolute Maximum Ratings and Electrical Characteristics sections.
Is the MAX709TCPA+ pin-compatible with other MAX709 variants?
Yes - all MAX709 variants (including MAX709LCPA+, MAX709MCPA+, MAX709RCPA+, MAX709SCPA+, and MAX709TCPA+) share identical 8-pin DIP pinout, electrical interface, and functional behavior. Only the reset threshold voltage differs between suffixes; no PCB changes are needed when substituting within the same package and temperature grade.
MAX709TCPA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- -
- Number of Voltages Monitored:
- -
- Voltage - Threshold:
- -
- Output:
- -
- Reset:
- -
- Reset Timeout:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX709TCPA+ FAQ
1.How can I place an order for MAX709TCPA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX709TCPA+ 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 MAX709TCPA+ reliable?
The price and inventory of MAX709TCPA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX709TCPA+ is usually 5 days.
3.What payment methods are accepted for MAX709TCPA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX709TCPA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX709TCPA+?
MAX709TCPA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX709TCPA+ 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 MAX709TCPA+?
For technical support, including MAX709TCPA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX709TCPA+ requirements.
6.How does Aetrix verify that MAX709TCPA+ is sourced from the original manufacturer or authorized distributors?
All MAX709TCPA+ 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 MAX709TCPA+ meets industry standards.
7.What is the process for return or replacement of MAX709TCPA+?
All MAX709TCPA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX709TCPA+, 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 MAX709TCPA+ part is unused and in its original packaging.
Return procedure for MAX709TCPA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX709TCPA+ 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…
