My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX708TEPA+
- Part No.:
- MAX708TEPA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX708TEPA+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,498
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX708TEPA+ from Maxim Integrated is a precision +3V microprocessor supervisory circuit with dual active-high and active-low reset outputs, 3.08V reset threshold, 200ms reset pulse width, and 1.25V power-fail comparator input-designed for reliable power-up/power-down monitoring in battery-powered portable instruments and industrial controllers.
For engineers reviewing the MAX708TEPA+ datasheet, MAX708TEPA+ pinout, MAX708TEPA+ application, or MAX708TEPA+ equivalent, this page delivers verified functional identity, exact package mapping (8-pin PDIP), confirmed timing behavior (200ms reset delay), and validated alternative options for critical µP reset supervision in embedded systems operating across -40°C to +85°C.
Technical Context
The MAX708TEPA+ integrates a precision voltage monitor with hysteresis (20mV), a guaranteed RESET assertion down to VCC = 1V, and independent PFI/PFO circuitry enabling early power-fail warning via external resistive dividers. Its dual-reset architecture (RESET and RESET) supports simultaneous interface to legacy and modern µP reset inputs without level-shifting.
Unlike MAX706 variants, the MAX708TEPA+ omits watchdog functionality but adds complementary reset outputs-enabling direct connection to both active-high and active-low reset pins on the same microcontroller or FPGA. It operates over VCC = 1.2V to 5.5V and draws only 65µA typical quiescent current at VCC < 5.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V (VCC falling); ensures reliable reset assertion before 3.3V µP brownout |
| Reset Pulse Width | 200ms (typical); meets JEDEC JESD78 requirement for minimum reset duration |
| Supply Voltage Range | 1.2V to 5.5V; supports operation during deep brownout and full 5V system rails |
| Quiescent Current | 65µA (typical at VCC < 5.5V); enables multi-year battery life in portable instrumentation |
| Power-Fail Threshold | 1.25V internal reference; allows configurable early-warning detection of unregulated supply collapse |
| Operating Temperature | -40°C to +85°C; qualified for industrial and automotive-adjacent embedded environments |
| Reset Output Types | Active-high RESET and active-low RESET; eliminates need for external inverters or logic |
Pinout & Package
MAX708TEPA+ is housed in an 8-pin plastic DIP (PDIP) package (package code P8-1), lead-free compliant, with 0.3-inch body width and through-hole mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Active-low manual reset input | Debounced TTL/CMOS-compatible input; 70µA internal pullup enables pushbutton use without external resistor |
| 2 VCC | Positive supply input | Accepts 1.2V–5.5V; RESET/RESET asserted down to VCC = 1V for fail-safe behavior |
| 3 GND | Ground reference | Common return for all internal comparators and outputs; requires low-impedance connection |
| 4 PFI | Power-fail comparator input | High-impedance (±25nA) input referenced to 1.25V; used with external divider for custom trip points |
| 5 PFO | Active-low power-fail output | Open-drain output sinks current when PFI < 1.25V; drives µP NMI or MR for orderly shutdown |
| 6 RESET | Active-low reset output | Guaranteed low during VCC < 3.08V or MR assertion; holds low 200ms after recovery |
| 7 RESET | Active-high reset output | Complementary to pin 6; high during valid VCC and deassertion window; no external pullup needed |
| 8 NC | No connection | Not internally bonded; must remain unconnected per datasheet to avoid malfunction |
Key Features
| Feature | Design Value |
|---|---|
| Dual complementary reset outputs | Simultaneous RESET (active-low) and RESET (active-high) eliminate external inversion logic and reduce BOM count |
| Guaranteed reset assertion to 1V VCC | Ensures µP remains held in reset even during severe brownout or battery sag below 2V |
| 1.25V precision PFI reference | Enables accurate, temperature-stable power-fail detection across -40°C to +85°C without calibration |
| 200ms factory-trimmed reset timeout | Meets µP reset timing requirements without external RC components or trimming |
| 100µA max supply current | Supports always-on supervision in energy-constrained applications such as handheld test equipment |
Applications
| Battery-Powered Portable Instruments | Industrial Controllers |
|---|---|
Use Scenario: Handheld multimeter powered by 3.7V Li-ion battery with AC adapter backup. IC Role / Device Role / Timing Role: Supervises main 3.3V rail and triggers controlled shutdown when battery drops below 3.08V or unregulated input collapses. Use Value: Prevents EEPROM corruption and display glitches during battery swap by guaranteeing 200ms reset hold time and early PFO warning. |
Use Scenario: PLC I/O module operating in factory environment with noisy 24V DC input converted to 3.3V. IC Role / Device Role / Timing Role: Monitors 3.3V logic rail and asserts both RESET and RESET to ARM Cortex-M7 and FPGA configuration logic. Use Value: Dual outputs eliminate level translators; 1.25V PFI detects upstream DC-DC failure before 3.3V rail collapses. |
| Computers & Embedded SBCs | Critical µP Power Monitoring |
Use Scenario: Single-board computer using 3.3V core and 5V I/O rails, requiring deterministic boot sequence. IC Role / Device Role / Timing Role: Generates synchronized reset signals for CPU, memory controller, and peripheral ASICs during cold start and brownout. Use Value: 200ms fixed delay ensures all devices meet tRST min; NC pin prevents accidental shorting in dense PCB layouts. |
Use Scenario: Medical infusion pump with safety-critical firmware requiring guaranteed reset under all power conditions. IC Role / Device Role / Timing Role: Primary reset supervisor with fail-safe assertion to VCC = 1V and manual reset override via front-panel button. Use Value: Eliminates risk of undetected µP lockup; PFO-driven interrupt initiates battery-backed data save before shutdown. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX708SEPA+ | 2.93V reset threshold; identical pinout, package, and dual-reset functionality | Suitable where system brownout margin requires earlier reset assertion (e.g., 3.0V nominal rails) | Select when VCC tolerance demands reset at 2.93V instead of 3.08V; drop-in replacement with no layout change |
| MAX708REPA+ | 2.63V reset threshold; same 8-pin PDIP package and dual-output architecture | Used in systems with wider supply tolerance or lower-voltage µPs (e.g., 2.8V logic cores) | Choose for deeper brownout immunity; functionally identical except reset threshold-no schematic or layout modification required |
Compared with MAX708TEPA+, MAX708SEPA+ and MAX708REPA+ offer identical dual-reset capability and package compatibility but differ only in factory-trimmed reset thresholds (2.93V and 2.63V), enabling precise matching to system supply tolerances without redesign.
Availability
MAX708TEPA+ is available at Aetrix Electronics and suitable for battery-powered equipment, industrial controllers, and critical µP power monitoring requiring stable component supply across extended temperature ranges.
Supply support for MAX708TEPA+ 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 and mixed-signal ICs for industrial, computing, and communications applications, with emphasis on reliability and integration.
The MAX708 series belongs to Maxim's microprocessor supervisory product line, engineered specifically to replace discrete reset circuits in space-constrained, high-reliability embedded systems requiring guaranteed reset behavior across wide voltage and temperature ranges.
FAQ
What is the reset threshold voltage of the MAX708TEPA+?
The MAX708TEPA+ has a factory-trimmed reset threshold of 3.08V (VCC falling), with ±75mV tolerance and 20mV hysteresis. This value is specified for operation across the full -40°C to +85°C temperature range and ensures reliable reset assertion before most 3.3V µPs enter undefined states. The threshold is laser-trimmed during production and does not require external calibration.
Does the MAX708TEPA+ include a watchdog timer function?
No, the MAX708TEPA+ does not include a watchdog timer. It is functionally distinct from the MAX706 series and provides only voltage monitoring, manual reset, and power-fail detection. The MAX708TEPA+ replaces watchdog capability with dual complementary reset outputs (RESET and RESET), making it ideal for systems requiring both signal polarities without external logic.
What package type is used for the MAX708TEPA+?
The MAX708TEPA+ uses an 8-pin plastic DIP (PDIP) package with 0.3-inch body width (package code P8-1). It is lead-free compliant and designed for through-hole mounting. Pin 8 is marked as NC (no connection) and must remain unconnected to ensure proper operation per the official Maxim datasheet.
Can the MAX708TEPA+ monitor power supplies other than VCC?
Yes, the MAX708TEPA+ includes a dedicated PFI (power-fail input) pin referenced to an internal 1.25V comparator. By connecting PFI to a resistive divider from an unregulated or auxiliary supply (e.g., 12V or -5V), users can configure early-warning detection for any voltage rail. The PFO output then signals collapse of that rail independently of VCC status.
How does the MAX708TEPA+ behave when VCC drops below 1V?
The MAX708TEPA+ guarantees RESET assertion while VCC ≥ 1V. Below 1V, the RESET output becomes high-impedance (open-drain), and RESET transitions to high-impedance as well. To maintain a defined logic state, a pull-down resistor (e.g., 100kΩ) is recommended on the RESET pin in systems where downstream CMOS inputs must not float during deep undervoltage conditions.
MAX708TEPA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.08V
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MAX708TEPA+ FAQ
1.How can I place an order for MAX708TEPA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX708TEPA+ 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 MAX708TEPA+ reliable?
The price and inventory of MAX708TEPA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX708TEPA+ is usually 5 days.
3.What payment methods are accepted for MAX708TEPA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX708TEPA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX708TEPA+?
MAX708TEPA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX708TEPA+ 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 MAX708TEPA+?
For technical support, including MAX708TEPA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX708TEPA+ requirements.
6.How does Aetrix verify that MAX708TEPA+ is sourced from the original manufacturer or authorized distributors?
All MAX708TEPA+ 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 MAX708TEPA+ meets industry standards.
7.What is the process for return or replacement of MAX708TEPA+?
All MAX708TEPA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX708TEPA+, 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 MAX708TEPA+ part is unused and in its original packaging.
Return procedure for MAX708TEPA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX708TEPA+ 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…
