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Analog Devices Inc./Maxim Integrated MAX6816EUS+
- Part No.:
- MAX6816EUS+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Specialized
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
MAX6816EUS+.pdf
- Description:
- 15KV ESD-PROTECTED, SINGLE/DUAL/
- Quantity:
- Payment:
- Shipping:
Inventory:4,068
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Product details
Overview
MAX6816EUS+ from Maxim Integrated is a single-channel CMOS mechanical switch debouncer IC that provides clean digital output after a fixed 20–80ms qualification delay, operates from +2.7V to +5.5V, draws only 6µA supply current, and features ±25V input fault tolerance with ±15kV HBM ESD protection - used for reliable µP interface in portable and industrial instruments.
For engineers reviewing the MAX6816EUS+ datasheet, MAX6816EUS+ pinout, MAX6816EUS+ application, or MAX6816EUS+ equivalent, key selection criteria include debounce timing stability over temperature, input overvoltage robustness, undervoltage lockout behavior at power-up, and SOT143 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX6816EUS+ implements a synchronous debounce algorithm using an on-chip oscillator, counter, and D flip-flop: input state must remain stable for ≥4 sampling periods before output updates. Its undervoltage-lockout circuit holds outputs in known logic states during VCC ramp-up below ~2.25V (typical), preventing spurious transitions at power-on.
Input pins integrate 63kΩ (typical) internal pullups and clamping diodes enabling ±25V fault tolerance relative to GND. All inputs are protected to ±15kV per Human Body Model and ±15kV per IEC 1000-4-2 air-gap discharge - verified across -40°C to +125°C operating range without latchup or functional degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage Range | +2.7V to +5.5V - supports direct interface with 3.3V and 5V logic systems without level-shifting. |
| Supply Current (ICC) | 6µA (typ) at VCC = 5V - enables multi-year battery life in portable instrumentation. |
| Debounce Duration (tDP) | 20–80ms - programmable via internal RC timing; removes both opening and closing bounce reliably. |
| Input Voltage Range | -25V to +25V - withstands industrial transients and miswiring without external protection components. |
| ESD Protection | ±15kV HBM, ±15kV IEC 1000-4-2 air-gap - eliminates need for discrete TVS diodes in harsh environments. |
| Undervoltage Lockout Threshold | 1.9V to 2.6V - ensures defined output state during brown-out or cold-start conditions. |
| Input Threshold (VIL/VIH) | 0.8V / 2.0–2.4V - compatible with TTL and CMOS logic families across full VCC range. |
Pinout & Package
The MAX6816EUS+ is housed in a 4-pin SOT143 package (top mark: KABA), with exposed pad not connected internally. Pin assignments are validated per Maxim's official pin configuration diagram and datasheet revision 8.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground reference | Return path for all internal circuitry and ESD protection networks; must be low-impedance connection to system ground plane. |
| 2 (IN) | Switch input | Accepts bouncing mechanical switch signal; includes 63kΩ pullup and ±25V fault-tolerant clamping diodes. |
| 3 (OUT) | Debounced CMOS output | Active-high, rail-to-rail output synchronized to stable input state; drives standard CMOS loads directly. |
| 4 (VCC) | Positive supply | +2.7V to +5.5V supply input; powers internal oscillator, logic, and ESD structures; requires local 0.1µF decoupling. |
Key Features
| Feature | Design Value |
|---|---|
| No external components required | Integrated oscillator, counter, and D flip-flop eliminate need for RC networks or microcontroller firmware debounce routines. |
| ±25V input fault tolerance | Clamping diodes and robust BiCMOS process allow direct connection to switches in electrically noisy industrial settings. |
| 6µA ultra-low supply current | Enables use in always-on battery-powered devices such as handheld test equipment and remote sensors. |
| Undervoltage lockout (UVLO) | Prevents metastable output states during power ramp-up by holding OUT in valid logic level until VCC exceeds threshold. |
| ±15kV HBM ESD protection | Eliminates field failures due to handling ESD in assembly and end-use environments without adding external protection. |
Applications
| Industrial Control Panels | Portable Test Equipment |
|---|---|
Use Scenario: Mechanical pushbuttons on factory HMIs subject to vibration, dust, and voltage transients. IC Role / Device Role / Timing Role: Single-channel debouncer converting noisy switch closures into glitch-free logic-level signals for PLC or µP input. Use Value: Eliminates false triggers caused by contact bounce and ESD events, improving system uptime and reducing firmware complexity. |
Use Scenario: Battery-operated multimeters and oscilloscope probes with membrane keypad interfaces. IC Role / Device Role / Timing Role: Low-power debouncer ensuring accurate button registration while extending battery life beyond 2 years. Use Value: 6µA quiescent current and no external components reduce BOM count and PCB area in compact enclosures. |
| Medical Instrument Keypads | Automated Test Fixtures |
Use Scenario: Touch-sensitive membrane keypads in diagnostic devices requiring high reliability and ESD immunity. IC Role / Device Role / Timing Role: Fault-tolerant switch interface providing certified ±15kV ESD protection per IEC 61000-4-2 Level 4. Use Value: Meets medical EMC requirements without external TVS diodes, simplifying regulatory certification. |
Use Scenario: Production-line test jigs where switches control fixture sequencing under repeated mechanical stress. IC Role / Device Role / Timing Role: Robust debouncer with ±25V input tolerance tolerating accidental 24V misconnection during maintenance. Use Value: Prevents damage and downtime from wiring errors or relay coil kickback, increasing fixture MTBF. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switch debouncing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6816EUS-T | Same die, leaded SOT143 package (RoHS non-compliant); identical electrical specs and timing. | No difference in function or performance; differs only in Pb content and compliance status. | Select MAX6816EUS+ for RoHS-compliant production; MAX6816EUS-T only if legacy Pb-based assembly is mandated. |
| MC33164DR2G | Single-channel comparator-based debouncer with 50ms fixed delay; lacks ±25V input tolerance and has higher 15µA ICC. | Requires external pullup and lacks integrated ESD protection - needs additional TVS and layout care. | Choose only if cost sensitivity outweighs robustness requirements; not suitable for industrial or portable battery designs. |
Compared with MAX6816EUS-T, the MAX6816EUS+ offers identical performance with RoHS compliance; compared with MC33164DR2G, it delivers superior fault tolerance, lower power, and true single-component integration - critical for high-reliability and space-constrained applications.
Availability
MAX6816EUS+ is available at Aetrix Electronics and suitable for industrial control panels, portable test equipment, and medical instrument keypads requiring stable component supply and long-term lifecycle support.
Supply support for MAX6816EUS+ 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, automotive, and communications applications.
The MAX6816EUS+ belongs to Maxim's robust interface IC product line, engineered specifically for reliable mechanical switch interfacing in electrically harsh and safety-critical environments.
FAQ
What is the debounce delay of the MAX6816EUS+ and how does it vary with temperature?
The MAX6816EUS+ has a nominal debounce delay of 40ms (typical), with guaranteed range of 20–80ms across -40°C to +125°C. This variation is intentional and designed to ensure reliable bounce removal under worst-case mechanical switch conditions; actual delay shifts predictably with temperature per Figure MAX6816 toc06 in the datasheet.
Can the MAX6816EUS+ operate with a 3.3V supply and still meet its input threshold specifications?
Yes - the MAX6816EUS+ supports VCC from +2.7V to +5.5V. At VCC = 3.3V, VIH is guaranteed ≥2.0V and VIL ≤0.8V, ensuring compatibility with standard 3.3V CMOS logic families without level translation.
Does the MAX6816EUS+ require an external bypass capacitor, and if so, what value is recommended?
Yes - a 0.1µF ceramic capacitor placed between VCC and GND, as close as possible to the MAX6816EUS+ pins, is required to stabilize the internal oscillator and suppress supply noise. This is explicitly specified in the Typical Operating Circuit and Absolute Maximum Ratings section.
How does the undervoltage lockout (UVLO) function affect the output state of the MAX6816EUS+ during power-up?
When VCC rises below the UVLO threshold (~2.25V typ), the MAX6816EUS+ passes the IN signal directly to OUT without debouncing - ensuring predictable logic levels at startup. Once VCC exceeds the threshold, normal debounce operation resumes immediately.
Is the MAX6816EUS+ pin-compatible with other devices in the MAX6816/MAX6817/MAX6818 family?
No - the MAX6816EUS+ uses a 4-pin SOT143 package, while MAX6817 variants use 6-pin SOT23 and MAX6818 uses 20-pin SSOP. Pin count, pinout, and functionality differ significantly; they are functionally related but not physically interchangeable.
MAX6816EUS+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-253-4, TO-253AA
- Packaging:
- Strip
- Product Status:
- Active
- Applications:
- Switch Interfacing
- Interface:
- Single
- Voltage - Supply:
- 2.7V ~ 5.5V
- Supplier Device Package:
- SOT-143-4
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
MAX6816EUS+ FAQ
1.How can I place an order for MAX6816EUS+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6816EUS+ 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 MAX6816EUS+ reliable?
The price and inventory of MAX6816EUS+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6816EUS+ is usually 5 days.
3.What payment methods are accepted for MAX6816EUS+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6816EUS+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6816EUS+?
MAX6816EUS+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6816EUS+ 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 MAX6816EUS+?
For technical support, including MAX6816EUS+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6816EUS+ requirements.
6.How does Aetrix verify that MAX6816EUS+ is sourced from the original manufacturer or authorized distributors?
All MAX6816EUS+ 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 MAX6816EUS+ meets industry standards.
7.What is the process for return or replacement of MAX6816EUS+?
All MAX6816EUS+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6816EUS+, 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 MAX6816EUS+ part is unused and in its original packaging.
Return procedure for MAX6816EUS+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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