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Analog Devices Inc./Maxim Integrated MAX16033LLB46+T
- Part No.:
- MAX16033LLB46+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 10-WFDFN
- Datasheet:
-
MAX16033LLB46+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 10UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,000
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Product details
Overview
The MAX16033LLB46+T from Maxim Integrated is a low-power, 10-pin μDFN supervisory circuit designed for microprocessor power monitoring and battery switchover in portable and industrial systems. It features a factory-set 4.63V reset threshold (L = push-pull RESET), active-low power-fail warning (PFO), debounced manual-reset input (MR), and chip-enable gating - all operating from 1.2V to 5.5V supply with 13µA quiescent current. It is used to safeguard SRAM backup during brownouts in POS terminals and set-top boxes.
For engineers reviewing the MAX16033LLB46+T datasheet, MAX16033LLB46+T pinout, MAX16033LLB46+T application, or MAX16033LLB46+T equivalent, key selection criteria include its 4.63V reset threshold tolerance (±0.12V), 140ms minimum reset timeout, push-pull RESET output structure, -40°C to +85°C temperature range, and integrated battery switchover with <2µA backup-mode supply current.
Technical Context
The MAX16033LLB46+T implements a precision voltage-monitoring architecture with independent comparators for VCC (reset generator), PFI (power-fail detection), and MR/RESETIN inputs. Its internal 1.235V reference enables accurate threshold setting for auxiliary supplies via external resistor dividers, while the push-pull RESET output drives loads up to 20mA with VOL ≤ 0.3V at ISINK = 1.6mA.
It integrates a dedicated chip-enable gating path (CEIN → CEOUT) with <7ns propagation delay (50Ω source, 50pF load), active-low open-drain PFO output, and battery switchover controlled by VCC–VBATT differential sensing with 40mV hysteresis - ensuring glitch-free transition between main and backup power sources without external logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 4.63V (factory-trimmed, ±0.12V over -40°C to +85°C); ensures reliable reset assertion before 5V system brownout. |
| Reset Timeout Period | 140ms minimum; guarantees µP initialization completes before release from reset state. |
| Supply Current (VCC = 3.6V) | 16µA typical; enables multi-year operation on coin-cell batteries in backup mode. |
| Battery Backup Supply Current | 2µA max at -40°C to +85°C (VBATT = 2.8V, VCC = 0V); minimizes battery drain during extended outages. |
| RESET Output Type | Active-low push-pull; eliminates need for external pull-up resistor and supports direct drive of µP reset pins. |
| Operating Temperature Range | -40°C to +85°C; qualified for industrial and commercial embedded applications including POS and set-top boxes. |
| VCC-to-OUT On-Resistance | 3.1Ω at VCC = 4.75V, IOUT = 150mA; limits voltage drop and power loss during main-supply operation. |
Pinout & Package
MAX16033LLB46+T is housed in a 2mm × 2mm, 10-pin µDFN package with exposed pad (pin 10 = GND EP), rated for -40°C to +85°C operation and RoHS-compliant (lead-free).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push-pull reset output | Asserts low when VCC < 4.63V, MR low, or PFI low; holds low ≥140ms after recovery to prevent premature µP execution. |
| 2 - CEIN | Chip-enable input | Controls CEOUT pass-through; disabled during reset to block erroneous writes to CMOS RAM during brownout. |
| 3 - PFI | Power-fail input | Monitors external supply via resistor divider; trips PFO when voltage falls below 1.235V (±1% hysteresis). |
| 4 - GND | Ground reference | Common return for VCC, BATT, and signal paths; connects to exposed thermal pad for improved heat dissipation. |
| 5 - MR | Manual-reset input | Debounced TTL/CMOS-compatible input; internal 20kΩ pullup enables momentary switch interface without external components. |
| 6 - PFO | Active-low power-fail output | Drives µP NMI or interrupt pin low upon PFI threshold breach; also asserts when VCC falls below reset threshold. |
| 7 - VCC | Main supply input | Accepts 1.2V–5.5V; powers internal circuitry and sources OUT until VCC drops below 4.63V. |
| 8 - OUT | Regulated output | Switches automatically between VCC and BATT; delivers up to 200mA from VCC or 20mA from battery during backup. |
| 9 - BATT | Backup battery input | Connects to coin cell or supercap; enables seamless switchover when VCC falls 40mV below VBATT. |
| 10 - CEOUT | Chip-enable output | Passes CEIN signal only when reset is deasserted; actively pulled up to OUT when disconnected, preventing floating states. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 4.63V reset threshold | Eliminates external resistor network and calibration effort for 5V system supervision. |
| Push-pull RESET output | Reduces BOM count by removing external pull-up resistor and improves noise immunity vs. open-drain alternatives. |
| Integrated chip-enable gating | Prevents data corruption in SRAM during power failure by disabling CE path within 1µs of reset assertion. |
| 13µA typical supply current | Extends battery life in always-on portable equipment such as handheld POS terminals and medical monitors. |
| 2mm × 2mm 10-pin µDFN package | Enables compact PCB layout in space-constrained applications like smart meters and IoT edge nodes. |
| Independent PFI comparator | Allows concurrent monitoring of secondary rails (e.g., 3.3V or 2.5V) without loading primary VCC supply. |
Applications
| POS Terminal Power Supervision | Set-Top Box SRAM Backup |
|---|---|
|
Use Scenario: Ensures reliable boot and data retention during AC line interruptions or battery swaps in retail point-of-sale systems. IC Role / Device Role / Timing Role: Provides µP reset, battery switchover to SRAM, and power-fail warning to trigger graceful shutdown. Use Value: Prevents transaction loss and memory corruption using 4.63V threshold aligned with 5V rail tolerance and 140ms reset hold time. |
Use Scenario: Maintains real-time clock and channel settings during brief power dips in consumer digital TV receivers. IC Role / Device Role / Timing Role: Acts as dual-rail supervisor - monitoring main 3.3V supply and enabling battery-backed SRAM retention. Use Value: Delivers <2µA backup current and automatic VCC/BATT switchover, extending coin-cell life beyond 5 years. |
| Industrial Controller Brownout Protection | Portable Medical Monitor Power Integrity |
|
Use Scenario: Safeguards programmable logic and configuration memory in PLCs subjected to noisy 24V DC field wiring. IC Role / Device Role / Timing Role: Supplies watchdog-triggered reset, manual reset via front-panel button, and CE gating for flash write protection. Use Value: Leverages debounced MR input and 1.6s watchdog timeout to detect firmware hangs without external timing components. |
Use Scenario: Guarantees ECG waveform buffer integrity during battery replacement in handheld diagnostic devices. IC Role / Device Role / Timing Role: Functions as low-quiescent supervisor with battery switchover and PFO-driven alert signaling. Use Value: Achieves 13µA operating current and 40mV switchover hysteresis to eliminate false triggers from transient supply droops. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16033PLB46+T | Same 4.63V reset threshold and pinout, but open-drain RESET and PFO outputs. | Requires external pull-up resistors; suited for wired-OR interrupt buses or level-shifting interfaces. | Select when interfacing with legacy µPs requiring open-drain reset or shared interrupt lines. |
| MAX16035LLB46+T | Includes BATTON high-indicator output; otherwise identical reset/PFI/CE functions and 4.63V threshold. | Provides visual or logic-level battery-active status; adds one dedicated output pin (pin 5). | Choose when system-level battery-switchover indication is required without adding discrete LEDs or comparators. |
Compared with MAX16033PLB46+T, the MAX16033LLB46+T eliminates external pull-ups and simplifies layout; compared with MAX16035LLB46+T, it omits BATTON to reduce cost and pin count where status indication is unnecessary.
Availability
MAX16033LLB46+T is available at Aetrix Electronics and suitable for POS terminals, set-top boxes, and industrial controllers requiring stable component supply, long-term lifecycle support, and guaranteed RoHS compliance.
Supply support for MAX16033LLB46+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 connectivity in industrial, automotive, and computing applications.
The MAX16033–MAX16040 family was engineered to replace discrete supervisory circuits in space-constrained, battery-sensitive µP systems - delivering integrated reset, watchdog, battery switchover, and power-fail detection in sub-4mm² packages.
FAQ
What is the reset threshold voltage of the MAX16033LLB46+T?
The MAX16033LLB46+T has a factory-trimmed reset threshold voltage of 4.63V, with a guaranteed range of 4.50V to 4.75V across -40°C to +85°C. This value is fixed per the "46" suffix in the part number and applies to VCC falling conditions. The device asserts RESET when VCC drops below this threshold and holds it for at least 140ms after VCC rises above it.
Does the MAX16033LLB46+T support battery backup functionality?
Yes, the MAX16033LLB46+T supports automatic battery backup switchover. When VCC falls below the 4.63V reset threshold and VBATT exceeds VCC by at least 40mV, the device disconnects VCC from OUT and connects BATT instead. In this mode, it draws only 2µA from the battery (max) while delivering regulated output to preserve SRAM contents.
What type of RESET output does the MAX16033LLB46+T provide?
The MAX16033LLB46+T provides an active-low push-pull RESET output (denoted by "L" in the part number). It actively drives low during reset and high when deasserted - eliminating the need for an external pull-up resistor. The output can sink 1.6mA with VOL ≤ 0.3V and source 500µA with VOH ≥ 0.8×VCC.
Can the MAX16033LLB46+T monitor a secondary power supply?
Yes, the MAX16033LLB46+T includes a dedicated PFI (power-fail input) pin that accepts a resistor-divider network to monitor secondary voltages. Its internal 1.235V comparator triggers PFO when the divided voltage falls below threshold. For example, a 3.3V rail can be monitored using R1 = 162kΩ and R2 = 100kΩ to set VPFI trip at 1.235V.
What is the purpose of the CEIN and CEOUT pins on the MAX16033LLB46+T?
The CEIN and CEOUT pins implement chip-enable gating to prevent data corruption during brownouts. When RESET is asserted, CEOUT is disabled - blocking CE transitions from reaching external memory. CEIN connects directly to CEOUT with <7ns delay during normal operation, and CEOUT is actively pulled up to OUT when disconnected, ensuring no floating state.
MAX16033LLB46+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-WFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.63V
- 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)
MAX16033LLB46+T FAQ
1.How can I place an order for MAX16033LLB46+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16033LLB46+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 MAX16033LLB46+T reliable?
The price and inventory of MAX16033LLB46+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16033LLB46+T is usually 5 days.
3.What payment methods are accepted for MAX16033LLB46+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16033LLB46+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16033LLB46+T?
MAX16033LLB46+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16033LLB46+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 MAX16033LLB46+T?
For technical support, including MAX16033LLB46+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16033LLB46+T requirements.
6.How does Aetrix verify that MAX16033LLB46+T is sourced from the original manufacturer or authorized distributors?
All MAX16033LLB46+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 MAX16033LLB46+T meets industry standards.
7.What is the process for return or replacement of MAX16033LLB46+T?
All MAX16033LLB46+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX16033LLB46+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 MAX16033LLB46+T part is unused and in its original packaging.
Return procedure for MAX16033LLB46+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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