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Analog Devices Inc./Maxim Integrated MAX16033PLB29+T
- Part No.:
- MAX16033PLB29+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 10-WFDFN
- Datasheet:
-
MAX16033PLB29+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 10UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:630
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Product details
Overview
The MAX16033PLB29+T from Maxim Integrated is a low-power microprocessor supervisory circuit with integrated battery switchover, power-fail warning, and chip-enable gating. It features a factory-set 2.93V reset threshold, active-low open-drain RESET/PFO outputs, and operates from 1.2V to 5.5V supply. It delivers 140ms minimum reset timeout, 13µA quiescent current, and supports SRAM backup in portable POS terminals and industrial controllers.
For engineers reviewing the MAX16033PLB29+T datasheet, MAX16033PLB29+T pinout, MAX16033PLB29+T application, or MAX16033PLB29+T equivalent, this device serves as a precision voltage-monitoring and battery-backup supervisor for brownout-critical μP systems requiring guaranteed reset assertion down to 1.2V, sub-µA battery standby current, and robust power-fail interrupt signaling.
Technical Context
The MAX16033PLB29+T integrates a precision reset generator with ±1.5% threshold accuracy over temperature, an independent 1.235V power-fail comparator (PFI/PFO), debounced manual-reset input (MR), and bidirectional chip-enable gating (CEIN/CEOUT). Its internal MOSFET enables seamless VCC-to-BATT switchover when VCC falls below 2.93V and VBATT exceeds VCC by ≥40mV.
It implements open-drain RESET and PFO outputs rated for 20mA sink, supports CEIN propagation delay of 1.5–7ns (50Ω/50pF), and maintains <2µA battery supply current at -40°C to +85°C in backup mode - enabling long-life operation in battery-powered instrumentation and real-time clock systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V (factory-set, ±1.5% over -40°C to +85°C) - ensures reliable μP reset during 3.0V/2.85V rail brownouts |
| Reset Timeout Period | 140ms (min) - guarantees sufficient hold time for full μP initialization after power recovery |
| Supply Current | 13µA typical at VCC = 2.8V - enables multi-year battery life in always-on backup applications |
| Battery Standby Current | 2µA max (-40°C to +85°C, VCC = 0V) - minimizes drain on coin-cell or supercap backup sources |
| Output Type | Active-low open-drain RESET and PFO - allows wired-OR logic, level translation, and flexible pull-up selection |
| VCC-to-OUT On-Resistance | 3.1Ω at VCC = 4.75V, IOUT = 150mA - supports up to 200mA SRAM supply with <0.5V dropout |
| Operating Temperature | -40°C to +85°C - qualified for industrial and embedded control environments |
Pinout & Package
MAX16033PLB29+T is housed in a 2mm × 2mm, 10-pin µDFN package with exposed pad (pin 10 = GND EP), RoHS-compliant and tape-and-reel packaged (+T).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low open-drain reset output | Asserts low during VCC < 2.93V, MR low, or power-fail; requires external pull-up for system reset signaling |
| 2 - CEIN | Chip-enable input | Controls CEOUT pass-gate; held high internally via 20kΩ pullup if unused; enables CE gating during brownout |
| 3 - PFI | Power-fail input | Monitors external voltage divider; trips PFO when VPFI falls below 1.235V (±1%) |
| 4 - GND | Ground reference | Primary return path for all analog/digital functions; connects to exposed thermal pad |
| 5 - MR | Manual-reset input | Debounced TTL/CMOS-compatible input; asserts RESET when pulled low; internal 20kΩ pullup to VCC |
| 6 - PFO | Active-low open-drain power-fail output | Signals PFI fault or VCC < 2.93V; sinks 20mA; used for NMI or system interrupt |
| 7 - VCC | Main supply input | Accepts 1.2V–5.5V; powers internal circuitry and supplies OUT during normal operation |
| 8 - OUT | Regulated output | Sources from VCC (≤200mA) or BATT (backup mode); powers SRAM or RTC during brownout |
| 9 - BATT | Backup battery input | Accepts 2.1V–5.5V; automatically engages when VCC < 2.93V and VBATT > VCC + 40mV |
| 10 - CEOUT | Chip-enable output | Passes CEIN signal only when RESET is deasserted; prevents erroneous RAM writes during power failure |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 2.93V reset threshold | ±1.5% accuracy over full temperature range eliminates external resistor calibration |
| Open-drain RESET and PFO outputs | Enable flexible interface with multiple voltage domains and shared interrupt lines |
| Integrated chip-enable gating (CEIN/CEOUT) | Prevents corrupted CMOS RAM writes during brownout by blocking CE transitions for ≥1µs after RESET assert |
| Sub-µA battery backup current | 2µA max at -40°C to +85°C preserves multi-year coin-cell life in RTC/SRAM retention |
| 140ms minimum reset timeout | Guarantees μP core and peripherals fully initialize before release from reset state |
| 40mV switchover hysteresis | Prevents oscillation during slow VCC ramp-down by requiring VBATT > VCC + 40mV to engage battery |
Applications
| Portable POS Terminals | Industrial Programmable Logic Controllers |
|---|---|
Use Scenario: Battery-backed memory retention during AC power loss or hot-swap battery replacement in retail payment terminals. IC Role / Device Role / Timing Role: Supervises 3.3V main rail, switches SRAM supply to coin cell, asserts RESET to halt transaction processing, and signals PFO to log power-fail event. Use Value: Prevents data corruption and ensures atomic transaction rollback with guaranteed 140ms reset hold and <2µA battery drain. |
Use Scenario: Maintaining configuration RAM and real-time clock during brownout in factory-floor PLCs with 24V DC input. IC Role / Device Role / Timing Role: Monitors 5.0V logic rail, gates CE signal to prevent spurious writes to nonvolatile registers, and triggers watchdog reset on firmware hang. Use Value: Enables fail-safe operation with CEOUT propagation delay <7ns and CEIN leakage <±1µA across industrial temperature range. |
| Set-Top Box Firmware Recovery | Medical Patient Monitor Data Logging |
Use Scenario: Preserving boot loader integrity and recovering from corrupted firmware updates in cable/satellite receivers. IC Role / Device Role / Timing Role: Generates power-on reset, monitors 3.3V/1.2V rails via PFI divider, asserts RESET on undervoltage, and holds reset until stable clock and memory are ready. Use Value: Ensures deterministic boot sequence with 2.93V threshold aligned to 3.0V LDO tolerance and 13µA ICC enabling low-quiescent design. |
Use Scenario: Securing ECG waveform buffers and timestamped vitals during brief AC outage in bedside monitors. IC Role / Device Role / Timing Role: Supplies backup power to SRAM via BATT, asserts BATTON (via companion MAX16035 variant) to enable external pass transistor, and latches PFO interrupt for diagnostic logging. Use Value: Delivers uninterrupted data capture with VCC-to-OUT RON ≤3.1Ω and battery switchover latency <1µs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16033LLB29+T | Push-pull RESET/PFO outputs instead of open-drain; higher drive strength (0.8×VCC VOH) | Requires no external pull-up resistors; unsuitable for wired-OR interrupt buses | Select when driving single-load reset lines directly without bus sharing |
| MAX16035PLB29+T | Adds BATTON push-pull output; omits CEIN/CEOUT gating; same reset/PFI functionality | Optimized for battery-status indication rather than memory write protection | Select when visual/LED battery-on signaling is required and CE gating is unnecessary |
Compared with MAX16033LLB29+T, the MAX16033PLB29+T offers greater flexibility in interrupt bus topology but requires external pull-ups; compared with MAX16035PLB29+T, it retains critical CEIN/CEOUT protection for SRAM integrity at the cost of lacking BATTON status indication.
Availability
MAX16033PLB29+T is available at Aetrix Electronics and suitable for portable POS terminals, industrial PLCs, set-top box firmware recovery, and medical data loggers requiring stable component supply, long-term lifecycle support, and guaranteed RoHS compliance.
Supply support for MAX16033PLB29+T 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 power management, sensing, and interface applications in industrial, automotive, and communications systems.
The MAX16033–MAX16040 product line delivers ultra-low-power supervisory circuits with integrated battery switchover and chip-enable gating, targeting SRAM-retention-critical systems where reliability under brownout and extended battery life are essential.
FAQ
What is the factory-set reset threshold voltage for MAX16033PLB29+T?
The MAX16033PLB29+T has a factory-trimmed reset threshold of 2.93V (minimum 2.85V, maximum 3.00V) with ±1.5% accuracy over -40°C to +85°C. This value is laser-trimmed during production and does not require external resistor networks. The '29' suffix in MAX16033PLB29+T explicitly denotes the 2.93V threshold variant, ensuring precise compatibility with 3.0V system rails.
Does MAX16033PLB29+T support battery backup for SRAM, and what is its battery current consumption?
Yes, MAX16033PLB29+T automatically switches OUT to BATT when VCC falls below 2.93V and VBATT exceeds VCC by ≥40mV. In battery-backup mode (VCC = 0V), its battery supply current is 2µA maximum over -40°C to +85°C - enabling multi-year operation on standard CR2032 coin cells. The device also provides <0.5V dropout (RON ≤3.1Ω) to maximize usable battery voltage range.
What is the function of CEIN and CEOUT pins on MAX16033PLB29+T, and how do they protect memory?
CEIN and CEOUT implement chip-enable signal gating: CEIN accepts the system's CE signal, and CEOUT passes it to memory only when RESET is deasserted. During brownout, when RESET asserts, CEOUT is forced high (or held for 1µs then high) to block write cycles - preventing corrupted data in CMOS RAM. This feature is exclusive to MAX16033–MAX16036 variants and is confirmed functional in MAX16033PLB29+T per the Pin Description table.
Can MAX16033PLB29+T monitor a secondary power supply using RESETIN?
No - RESETIN functionality is exclusive to MAX16036/MAX16040 variants (e.g., MAX16036PLB29+T). The MAX16033PLB29+T does not include the RESETIN pin or internal 1.235V comparator for auxiliary voltage monitoring. Its supervision is limited to VCC, PFI, MR, and battery switchover. For dual-rail monitoring, MAX16036PLB29+T or MAX16040PLB29+T must be selected.
What package type and footprint does MAX16033PLB29+T use, and is thermal pad connection required?
MAX16033PLB29+T uses a 2mm × 2mm, 10-pin µDFN package with exposed thermal pad (pin 10). The exposed pad must be soldered to a PCB thermal plane for proper thermal dissipation and electrical grounding - it is not optional. This construction enables 402.8mW continuous power dissipation at +70°C and supports reflow soldering per JEDEC J-STD-020 standards.
MAX16033PLB29+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-WFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.93V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-µDFN (2x2)
MAX16033PLB29+T FAQ
1.How can I place an order for MAX16033PLB29+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16033PLB29+T 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 MAX16033PLB29+T reliable?
The price and inventory of MAX16033PLB29+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16033PLB29+T is usually 5 days.
3.What payment methods are accepted for MAX16033PLB29+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16033PLB29+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16033PLB29+T?
MAX16033PLB29+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16033PLB29+T 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 MAX16033PLB29+T?
For technical support, including MAX16033PLB29+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16033PLB29+T requirements.
6.How does Aetrix verify that MAX16033PLB29+T is sourced from the original manufacturer or authorized distributors?
All MAX16033PLB29+T 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 MAX16033PLB29+T meets industry standards.
7.What is the process for return or replacement of MAX16033PLB29+T?
All MAX16033PLB29+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX16033PLB29+T, 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 MAX16033PLB29+T part is unused and in its original packaging.
Return procedure for MAX16033PLB29+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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