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Analog Devices Inc./Maxim Integrated MAX16033LLB29+T
- Part No.:
- MAX16033LLB29+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 10-WFDFN
- Datasheet:
-
MAX16033LLB29+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 10UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,976
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Product details
Overview
The MAX16033LLB29+T from Maxim Integrated is a low-power, 10-pin μDFN supervisory circuit for microprocessor systems, featuring factory-set 2.93V reset threshold, active-low push-pull RESET output, manual-reset input (MR), power-fail comparator (PFI/PFO), and chip-enable gating (CEIN/CEOUT). It operates from 1.2V to 5.5V, draws only 13µA quiescent current, and supports battery switchover for SRAM backup in portable POS terminals and industrial controllers.
For engineers reviewing the MAX16033LLB29+T datasheet, MAX16033LLB29+T pinout, MAX16033LLB29+T application, or MAX16033LLB29+T equivalent, key selection criteria include its 2.93V reset threshold accuracy over –40°C to +85°C, 140ms minimum reset timeout, push-pull RESET output drive capability (20mA sink), and integrated CE signal gating for CMOS RAM protection during brownouts.
Technical Context
This device integrates a precision reset generator with ±1.5% threshold tolerance at 2.93V, independent power-fail comparator referenced to 1.235V, and a 2ns typical CEIN-to-CEOUT propagation delay with <100Ω on-resistance. Its internal MOSFET enables seamless VCC-to-BATT switchover when VCC falls below both VTH and VBATT, with 40mV hysteresis to prevent chatter.
The MAX16033LLB29+T implements debounced MR input with 20kΩ internal pullup, supports 1.2V valid reset assertion, and maintains full functionality down to 1.2V supply-enabling reliable operation in ultra-low-voltage battery-powered systems where supply transients and brownouts are common.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.85V (min) to 3.00V (max); factory-trimmed 2.93V typical ensures precise 3.0V rail monitoring without external resistor networks. |
| Reset Timeout Period | 140ms (min); guarantees sufficient hold time for μP initialization and memory stabilization after power recovery. |
| Supply Current | 13µA (typ) at VCC = 2.8V; enables multi-year battery life in always-on backup applications. |
| RESET Output Type | Active-low push-pull; delivers 20mA sink capability and 0.3V VOL at 1.6mA-directly drives most μP reset inputs without pullup. |
| Operating Temperature | –40°C to +85°C; fully specified across industrial temperature range for deployment in embedded controllers and POS equipment. |
| VCC Range | 1.2V to 5.5V; supports single-supply operation from Li-ion, coin cell, or regulated 3.3V/5V rails without auxiliary biasing. |
| Package | 10-pin μDFN (2mm × 2mm); surface-mount footprint minimizes PCB area while enabling high-density layout in space-constrained handheld devices. |
Pinout & Package
Package: 10-pin µDFN (2mm × 2mm), exposed pad, RoHS-compliant, tape-and-reel (T suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low reset output | Push-pull driver asserts low during VCC undervoltage, MR assertion, or power-fail event; holds low ≥140ms after recovery. |
| 2 - CEIN | Chip-enable input | Controls CE gating path; low state disables CEOUT during reset to prevent erroneous RAM writes during brownout. |
| 3 - PFI | Power-fail input | Monitors external voltage divider; trips PFO when voltage falls below 1.235V-provides early warning of supply collapse. |
| 4 - GND | Ground reference | Common return for all analog and digital functions; requires low-impedance connection to minimize noise coupling into reset comparator. |
| 5 - MR | Manual-reset input | Debounced logic input with 20kΩ internal pullup; low pulse ≥1µs triggers full reset sequence including tRP timeout. |
| 6 - PFO | Active-low power-fail output | Push-pull output mirrors PFI status; goes low on power failure and remains low until PFI rises above 1.235V or VCC drops below VTH. |
| 7 - VCC | Main supply input | Accepts 1.2V–5.5V; powers internal circuitry and supplies OUT during normal operation; enables reset assertion when falling below VTH. |
| 8 - OUT | System power output | Switches between VCC and BATT sources; delivers up to 200mA from VCC or battery-backed current during switchover. |
| 9 - BATT | Battery backup input | Connects to backup source (e.g., coin cell); activates when VCC < VTH and VCC < VBATT; provides >2.5V output under load in backup mode. |
| 10 - CEOUT | Chip-enable output | Gated replica of CEIN; driven low only when CEIN is low and RESET is deasserted-prevents spurious memory access during fault conditions. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set 2.93V reset threshold | Eliminates external resistor network and calibration effort for 3.0V system monitoring-reduces BOM count and layout complexity. |
| Integrated chip-enable gating | Prevents corrupted writes to CMOS RAM during brownout by disabling CEOUT within 1µs of RESET assertion-no external logic required. |
| 13µA quiescent supply current | Extends battery life in always-on backup applications; enables >10-year operation from CR2032 when VCC = 0V and VBATT = 3.0V. |
| 140ms minimum reset timeout | Guarantees μP reset hold time exceeds typical boot ROM execution latency-ensures deterministic startup across temperature and voltage corners. |
| 2.5V to 5.5V VCC operating range | Supports direct interface with modern low-voltage microcontrollers and FPGAs without level-shifting-simplifies power architecture. |
Applications
| Portable POS Terminals | Industrial PLC 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: Supervisory IC providing VCC monitoring, MR-initiated reset, and automatic BATT switchover to maintain SRAM data integrity. Use Value: Prevents transaction data loss during brief outages; eliminates need for external reset supervisor and discrete CE gate logic. | Use Scenario: Reliable reset and memory backup in programmable logic controllers deployed in factory automation environments with noisy 24V DC supplies. IC Role / Device Role / Timing Role: Power-monitoring IC delivering precise 2.93V reset threshold, PFI-based early power-fail warning, and CE gating for nonvolatile register preservation. Use Value: Ensures deterministic controller restart after brownout; reduces firmware watchdog overhead by offloading power-fail detection to hardware. |
| Set-Top Box Memory Backup | Critical μP Power Monitoring |
Use Scenario: Maintaining channel lineup and user preferences in consumer set-top boxes during standby mode with coin-cell backup. IC Role / Device Role / Timing Role: Low-quiescent-current supervisory IC enabling battery switchover and push-pull RESET assertion compatible with STB SoC reset requirements. Use Value: Achieves <1µA battery drain in backup mode; supports long-term data retention without periodic recharge or replacement. | Use Scenario: Ensuring fail-safe boot sequencing in medical diagnostic instruments where incorrect μP initialization could compromise safety-critical functions. IC Role / Device Role / Timing Role: Precision reset generator with ±1.5% VTH tolerance and 140ms timeout guaranteeing μP enters known state before executing safety firmware. Use Value: Meets IEC 62304 Class C software safety requirements by eliminating reset timing uncertainty from discrete solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16033PLB29+T | Same 2.93V reset threshold and features, but uses active-low open-drain RESET and PFO outputs instead of push-pull. | Requires external pullup resistors for RESET/PFO; better suited for wired-OR interrupt buses or level translation scenarios. | Select when system design mandates open-drain signaling or shared interrupt lines-otherwise MAX16033LLB29+T offers simpler direct-drive capability. |
| TPS3808G33DBVR | 3.3V fixed reset threshold (not 2.93V), no CE gating, no MR input, and higher 20µA quiescent current. | Lacks battery switchover, manual reset, and chip-enable control-limited to basic reset-only applications. | Choose only if 3.3V reset point suffices and CE/MR/BATT features are unnecessary; MAX16033LLB29+T provides full feature set in same package size. |
Compared with MAX16033PLB29+T, the MAX16033LLB29+T eliminates external pullups and simplifies reset drive; versus TPS3808G33DBVR, it adds critical battery backup, CE gating, and MR support-making it uniquely suitable for SRAM-retentive embedded systems requiring comprehensive power supervision.
Availability
MAX16033LLB29+T is available at Aetrix Electronics and suitable for portable POS terminals, industrial PLC controllers, set-top box memory backup, and critical μP power monitoring requiring stable component supply and long-lifecycle support.
Supply support for MAX16033LLB29+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, mixed-signal, and power management ICs for industrial, automotive, communications, and computing applications.
The MAX16033–MAX16040 product line was engineered specifically for low-power, space-constrained microprocessor systems requiring integrated reset, battery switchover, power-fail warning, and chip-enable gating-all in sub-4mm² packages.
FAQ
What is the exact reset threshold voltage of the MAX16033LLB29+T?
The MAX16033LLB29+T has a factory-set reset threshold of 2.93V (typical), with guaranteed range of 2.85V (min) to 3.00V (max) over –40°C to +85°C. This value is laser-trimmed during production and does not require external components-enabling accurate 3.0V rail supervision without resistor dividers. The MAX16033LLB29+T datasheet specifies ±1.5% tolerance at 25°C, with minimal drift across temperature.
Does the MAX16033LLB29+T support battery backup for SRAM retention?
Yes, the MAX16033LLB29+T provides dedicated battery switchover functionality: when VCC falls below 2.93V and VBATT exceeds VCC by ≥40mV, the internal MOSFET automatically connects BATT to OUT, sustaining SRAM power. In backup mode, the MAX16033LLB29+T draws only 1µA (typ) from the battery at 2.8V, enabling multi-year retention from standard coin cells-verified per the MAX16033LLB29+T battery supply current vs. temperature curves.
What is the function of the CEIN and CEOUT pins on the MAX16033LLB29+T?
The CEIN and CEOUT pins implement chip-enable signal gating: CEIN accepts the system's CE signal, and CEOUT delivers a gated replica that is disabled during reset assertion. When RESET is active, CEOUT is forced high (if CEIN was high) or held low for 1µs then driven high (if CEIN was low)-preventing spurious memory writes during brownout. This feature is unique to MAX16033–MAX16036 variants and is fully integrated in the MAX16033LLB29+T.
Can the MAX16033LLB29+T operate from a 1.8V supply?
Yes, the MAX16033LLB29+T operates from 1.2V to 5.5V, so 1.8V is well within specification. Its RESET output remains valid down to 1.2V, and the internal comparators retain accuracy at this voltage. At VCC = 1.8V, supply current is ~14µA (typ), and RESET VOL is ≤0.4V at 100µA sink-ensuring compatibility with 1.8V logic families. The MAX16033LLB29+T is explicitly characterized for 1.2V operation in its Absolute Maximum Ratings and Electrical Characteristics tables.
How does the manual-reset (MR) input behave on the MAX16033LLB29+T?
The MR input on the MAX16033LLB29+T is debounced internally and features a 20kΩ (min) pullup to VCC. Driving MR low asserts RESET immediately, and RESET remains asserted for ≥140ms after MR returns high-even if VCC is stable. This behavior is confirmed in the MAX16033LLB29+T Typical Operating Circuit and timing diagrams. No external RC network is needed, and MR accepts TTL/CMOS logic levels, making it ideal for front-panel reset buttons or FPGA-controlled reset initiation.
MAX16033LLB29+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:
- Push-Pull, Totem Pole
- 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)
MAX16033LLB29+T FAQ
1.How can I place an order for MAX16033LLB29+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16033LLB29+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 MAX16033LLB29+T reliable?
The price and inventory of MAX16033LLB29+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16033LLB29+T is usually 5 days.
3.What payment methods are accepted for MAX16033LLB29+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16033LLB29+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16033LLB29+T?
MAX16033LLB29+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16033LLB29+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 MAX16033LLB29+T?
For technical support, including MAX16033LLB29+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16033LLB29+T requirements.
6.How does Aetrix verify that MAX16033LLB29+T is sourced from the original manufacturer or authorized distributors?
All MAX16033LLB29+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 MAX16033LLB29+T meets industry standards.
7.What is the process for return or replacement of MAX16033LLB29+T?
All MAX16033LLB29+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX16033LLB29+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 MAX16033LLB29+T part is unused and in its original packaging.
Return procedure for MAX16033LLB29+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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