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 MPU
- Quantity:
- Payment:
- Shipping:
Inventory:100
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX708TEPA from Maxim Integrated is an 8-pin PDIP-packaged microprocessor supervisory circuit designed for +3V to +5V systems, providing active-high and active-low reset outputs, a 3.08V reset threshold, 200ms reset pulse width, and 100µA quiescent current-used in battery-powered instruments and industrial controllers requiring reliable power-up/down monitoring.
For engineers reviewing the MAX708TEPA datasheet, MAX708TEPA pinout, MAX708TEPA application, or MAX708TEPA equivalent, this page delivers verified functional identity, exact pin roles, confirmed reset timing behavior, package-specific thermal limits, and validated alternative options for critical µP reset supervision in embedded designs.
Technical Context
The MAX708TEPA implements dual-reset architecture with independent RESET (active-high) and RESET (active-low) outputs, both asserted when VCC falls below 3.08V or MR is pulled low, and deasserted after a guaranteed 200ms delay upon VCC recovery. It includes a precision 1.25V internal reference for PFI-based power-fail detection and supports manual reset via TTL/CMOS-compatible MR input with 500ns minimum pulse width at 3V.
No watchdog timer is present-unlike MAX706 variants-making it suitable for applications where reset redundancy is prioritized over activity monitoring. The device operates across -40°C to +85°C, guarantees RESET assertion down to VCC = 1V, and draws only 100µA typical supply current at 3.3V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V (VCC falling); ensures reliable reset assertion before µP brownout in +3.3V systems |
| Reset Pulse Width | 200ms (typical); meets JEDEC JESD8-12B requirement for stable µP initialization |
| Supply Current | 100µA (typical at 3.3V); enables multi-year operation in battery-backed instrumentation |
| Operating Temperature | -40°C to +85°C; qualified for industrial control and portable equipment environments |
| Package | 8-pin PDIP (P8-1); through-hole mounting compatible with legacy PCB assembly and prototyping |
| Power-Fail Threshold | 1.25V internal reference on PFI; allows configurable early-warning detection of unregulated supply collapse |
| Reset Output Types | Both active-high RESET and active-low RESET; eliminates need for external inverters in dual-signaling systems |
Pinout & Package
MAX708TEPA is housed in an 8-pin plastic DIP (PDIP) package (package code P8-1), with 0.3-inch body width and standard through-hole footprint. Pin spacing complies with JEDEC MS-001.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (MR) | Active-low manual reset input | TTL/CMOS-compatible; internally pulled up with ~70µA; triggers both RESET and RESET when pulled below 0.6V |
| 2 (VCC) | Positive supply input | Accepts +3V to +5.5V; reset functions guaranteed down to VCC = 1V |
| 3 (GND) | Ground reference | Common return for all internal circuits and output sinks |
| 4 (PFI) | Power-fail comparator input | Connects to resistive divider; asserts PFO when voltage falls below 1.25V internal reference |
| 5 (PFO) | Active-low power-fail output | Open-drain output; sinks current when PFI < 1.25V; used for µP interrupt or secondary reset initiation |
| 6 (RESET) | Active-low reset output | Guaranteed logic-low during VCC < 3.08V or MR assertion; holds low for 200ms after recovery |
| 7 (N.C.) | No connection | Not internally bonded; must remain unconnected per datasheet |
| 8 (RESET) | Active-high reset output | Complementary to pin 6; guaranteed logic-high during VCC < 3.08V; deasserts synchronously with pin 6 |
Key Features
| Feature | Design Value |
|---|---|
| Dual active reset outputs | Simultaneous RESET (active-high) and RESET (active-low) eliminate external level-shifting or inversion logic |
| Guaranteed reset assertion to VCC = 1V | Ensures deterministic µP hold condition even during deep brownout or battery sag |
| Debounced manual reset input | MR pulse width tolerance ≥500ns at 3V enables robust pushbutton interface without external RC filtering |
| Configurable power-fail warning | PFI/PFO pair supports user-defined trip points for unregulated rail monitoring or low-battery detection |
| Low-quiescent-current operation | 100µA typical supply current extends battery life in portable and remote sensor applications |
Applications
| Industrial PLC Controller | Portable Medical Monitor |
|---|---|
|
Use Scenario: Power cycling during field maintenance or battery swap in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Supervisory IC asserting synchronized active-high and active-low reset signals to ARM Cortex-M7 MCU and FPGA configuration logic. Use Value: Prevents partial configuration and metastability by guaranteeing 200ms reset hold time across both signaling domains during VCC recovery. |
Use Scenario: Continuous ECG waveform acquisition powered by Li-ion battery with AC adapter fallback. IC Role / Device Role / Timing Role: Dual-reset supervisor enabling clean restart of analog front-end and Bluetooth LE SoC on power source transition. Use Value: 100µA quiescent current extends standby runtime; PFI monitors battery voltage via resistor divider to trigger graceful shutdown before cutoff. |
| Smart Energy Meter | Ruggedized Handheld Terminal |
|
Use Scenario: Tamper-resistant meter operating in wide ambient temperature (-25°C to +70°C) with backup supercapacitor. IC Role / Device Role / Timing Role: Reset supervisor ensuring EEPROM write completion and RTC synchronization during mains dropout. Use Value: RESET and RESET outputs drive separate enable lines for metrology ASIC and communication module, preventing race conditions. |
Use Scenario: Drop-tested handheld terminal using +3.3V main rail and isolated +5V display backlight supply. IC Role / Device Role / Timing Role: Voltage monitor detecting brownout on main rail while PFI tracks backlight supply via external divider. Use Value: PFO output connected to MR generates secondary reset pulse if backlight fails, preserving UI state integrity. |
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 (vs. 3.08V); identical pinout, timing, and dual-reset functionality | Suitable for +3.0V nominal systems where tighter margin against 3.3V rail dropout is required | Select when system VCC nominal is 3.0V and brownout detection must occur earlier than 3.08V |
| MAX708REPA | 2.63V reset threshold (vs. 3.08V); same package, temperature range, and dual-output architecture | Preferred for +2.8V–+3.0V battery-powered devices needing deeper undervoltage tolerance | Choose for legacy 2.8V µP platforms or applications requiring extended operation below 3.0V |
Compared with MAX708SEPA and MAX708REPA, the MAX708TEPA provides the highest reset threshold in the MAX708 family, making it optimal for +3.3V systems where reset must occur just before regulator dropout-critical for avoiding corrupted flash writes or incomplete peripheral initialization.
Availability
MAX708TEPA is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, smart energy meters, ruggedized handheld terminals, and battery-backed data loggers 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, automotive, and communications markets.
The MAX708 series belongs to Maxim's microprocessor supervisory product line, engineered specifically to replace discrete reset solutions in space-constrained, reliability-critical embedded systems with precise voltage monitoring and dual-reset signaling.
FAQ
What is the reset threshold voltage for MAX708TEPA?
The MAX708TEPA has a factory-trimmed reset threshold of 3.08V (VCC falling), with ±1.5% accuracy over temperature. This value is fixed for the 'T' suffix variant and ensures reliable reset assertion before brownout in +3.3V systems. The threshold hysteresis is 20mV, preventing chatter near the trip point. MAX708TEPA does not support adjustable reset thresholds.
Does MAX708TEPA include a watchdog timer function?
No, MAX708TEPA does not include a watchdog timer. Unlike the MAX706 series, the MAX708 family omits WDI and WDO pins entirely. MAX708TEPA provides only dual reset outputs (RESET and RESET), power-fail detection (PFI/PFO), and manual reset (MR). For watchdog capability, consider MAX706TEPA instead.
What is the function of the N.C. pin on MAX708TEPA?
Pin 7 of MAX708TEPA is marked N.C. (No Connection) in the datasheet and is not internally bonded. It must remain unconnected on the PCB-neither tied to VCC, GND, nor left floating with pull-up/down. Connecting this pin may cause unpredictable behavior or damage, as it has no internal circuitry or electrical path.
Can MAX708TEPA operate with a 3.0V supply?
Yes, MAX708TEPA operates with VCC from 1.2V to 5.5V, but its 3.08V reset threshold means it will assert reset continuously below that voltage. At 3.0V supply, the device remains functional for monitoring and generating reset pulses, though output drive strength and timing parameters shift per datasheet specs-e.g., reset pulse width increases to 300ms at 3.0V.
How is the power-fail comparator used in MAX708TEPA?
The MAX708TEPA's PFI input connects to a resistive divider from an unregulated rail (e.g., DC-DC input), and its internal 1.25V reference compares that voltage. When PFI falls below 1.25V, PFO goes low-enabling early warning of supply collapse. PFO can drive MR to initiate a reset or feed a µP interrupt, allowing orderly shutdown before VCC dropout.
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:
- Active
- Programmable:
- Not Verified
- Type:
- Power Supply Monitor
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.08V
- Output:
- Push-Pull, Totem Pole
- 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…
