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Analog Devices Inc./Maxim Integrated MAX16024LTBZ18+T
- Part No.:
- MAX16024LTBZ18+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
MAX16024LTBZ18+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 10TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,981
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Product details
Overview
MAX16024LTBZ18+T from Maxim Integrated is a low-power, 10-pin TDFN battery-backup circuit with integrated 100mA LDO, push-pull reset output, 2.32V reset threshold, and fixed 1.8V regulated output. It provides automatic switchover from main supply (VCC) to backup battery (BATT) during brownout, supports chip-enable gating, and includes battery-on indicator-designed for SRAM/RTC backup in portable industrial equipment.
For engineers reviewing the MAX16024LTBZ18+T datasheet, MAX16024LTBZ18+T pinout, MAX16024LTBZ18+T application, or MAX16024LTBZ18+T equivalent, key selection criteria include its 1.8V fixed LDO output, -40°C to +85°C operation, 4µA typical supply current, BATT ON indicator functionality, and CEIN/CEOUT signal gating with 1.5ns propagation delay.
Technical Context
The MAX16024LTBZ18+T integrates a low-dropout linear regulator, microprocessor reset supervisor, battery switchover controller, and chip-enable signal gating logic. Its reset circuit asserts active-low RESET when VCC falls below 2.32V (typ) or MR is pulled low, with 145ms minimum timeout and 20µs falling-edge delay.
It features dedicated BATT ON output that goes high during battery-backup mode, SET pin unused (fixed 1.8V version), and CEIN-to-CEOUT transmission gate with 8–50Ω on-resistance and 12µs reset-to-CEOUT hold time. All functions operate across 1.53V–5.5V input range with 3.5–5.26µA battery-mode quiescent current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Regulated Output Voltage | 1.8V ±2.5% (factory-trimmed; ensures stable SRAM/RTC bias under load) |
| Reset Threshold Voltage | 2.32V (typ); triggers reset before critical brownout of 3.3V/2.5V system rails |
| LDO Output Current | 100mA max; sufficient for 32KB–1MB SRAM or RTC + oscillator circuits |
| Supply Current (VCC) | 4µA (typ); enables multi-year battery life in always-on backup applications |
| Battery-Backup Mode Current | 3.5–5.26µA (typ); ultra-low drain preserves coin-cell shelf life |
| Operating Temperature | -40°C to +85°C; qualified for industrial control and GPS systems |
| Package | 10-pin TDFN-EP (3mm × 3mm); exposed pad improves thermal performance |
Pinout & Package
MAX16024LTBZ18+T uses a 10-pin TDFN-EP package (3mm × 3mm, 0.5mm pitch) with exposed pad thermally connected to GND. Pin 1 is CEIN; pin 10 is CEOUT. The exposed pad must be soldered to a large PCB ground plane for thermal management and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CEIN | Chip-enable input | Drives internal transmission gate; low = enable CEOUT pass-through during normal operation |
| 2 GND | Ground reference | Main signal and power return; connects internally to exposed pad |
| 3 OUT | LDO regulated output | 1.8V supply for SRAM/RTC; requires 10µF low-ESR capacitor to GND |
| 4 RESET | Active-low reset output | Push-pull configuration; drives µP reset pin directly without pull-up |
| 5 BATT | Backup battery input | Supplies LDO when VCC < 2.32V and VCC < VBATT; bypass with 0.1µF |
| 6 CEIN | Chip-enable input (duplicate pin assignment per datasheet) | Same function as Pin 1; redundant connection for layout flexibility |
| 7 VCC | Main supply input | 1.53V–5.5V primary rail; bypass with 0.1µF ceramic capacitor |
| 8 MR | Manual reset input | Active-low; internally pulled up to VCC (30kΩ); debounced internally |
| 9 BATT ON | Battery-on status indicator | Active-high open-drain output; signals entry into battery-backup mode |
| 10 CEOUT | Chip-enable output | Active-low gated output; disabled during reset to prevent RAM corruption |
Key Features
| Feature | Design Value |
|---|---|
| Integrated CE signal gating | 1.5ns CEIN-to-CEOUT propagation delay prevents erroneous writes during brownout |
| Battery-on indicator | Dedicated BATT ON output confirms switchover to backup power without software polling |
| Battery freshness seal | Internal latch disconnects BATT from OUT until first VCC power-up, preserving battery life |
| Ultra-low battery-mode current | 3.5µA typical IBATT extends CR2032 coin-cell life beyond 10 years in standby |
| Factory-trimmed 1.8V LDO | ±2.5% accuracy over temperature eliminates external feedback resistors and calibration |
| Reset timeout with hysteresis | 145ms min tRP ensures reliable µP initialization; built-in VPFI-HYS rejects supply noise |
Applications
| Industrial Real-Time Clock Backup | Portable GPS Data Logger |
|---|---|
|
Use Scenario: Maintaining accurate timekeeping and alarm registers in factory automation PLCs during AC mains failure. IC Role / Device Role / Timing Role: Provides regulated 1.8V power and reset supervision to standalone RTC IC (e.g., DS3231) while signaling battery switchover via BATT ON. Use Value: Eliminates need for discrete LDO + reset IC + GPIO monitoring, reducing BOM count by 3 components and PCB area by >25mm². |
Use Scenario: Preserving GNSS position fix history and configuration in handheld surveying equipment during battery swap. IC Role / Device Role / Timing Role: Powers SRAM buffer storing last-known coordinates and satellite almanac; gates CE to prevent partial write corruption during voltage sag. Use Value: CEOUT hold time (12µs) ensures completion of final flash write before reset assertion, guaranteeing data integrity. |
| Point-of-Sale Memory Retention | Set-Top Box Configuration Storage |
|
Use Scenario: Securing transaction logs and tax tables in retail terminals during unexpected power loss. IC Role / Device Role / Timing Role: Supplies 1.8V to 256KB SRAM and asserts RESET to halt processor; BATT ON triggers firmware save routine. Use Value: 4µA VCC supply current allows continuous monitoring without impacting main system efficiency. |
Use Scenario: Backing up channel lineup, parental controls, and EPG data in cable/satellite receivers during grid outage. IC Role / Device Role / Timing Role: Regulates power to serial EEPROM and generates synchronized reset pulse to MCU upon VCC dropout. Use Value: Push-pull RESET output drives MCU reset pin directly-no external pull-up resistor required, simplifying layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery-backup supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16024LTBS18+T | Reset threshold 2.93V (vs. 2.32V); same 1.8V output, 10-pin TDFN, push-pull RESET | Suitable for systems where main supply nominal is 3.3V and brownout detection must occur later in collapse | Select when higher reset threshold aligns with system VCC rail tolerance and fail-safe timing requirements |
| MAX16023LTAS18+T | 8-pin TDFN, no CEIN/CEOUT or BATT ON; identical 1.8V output and 2.93V reset threshold | Lacks signal gating and battery-status indication-requires external logic for CE control and monitoring | Choose for cost-sensitive designs where CE gating and BATT ON are unnecessary and board space is constrained |
Compared with MAX16024LTBZ18+T, MAX16024LTBS18+T offers later reset assertion for 3.3V systems but lacks the precise 2.32V trip needed for 2.5V/1.8V rails; MAX16023LTAS18+T reduces footprint and cost but removes critical reliability features like CE gating and battery-on signaling.
Availability
MAX16024LTBZ18+T is available at Aetrix Electronics and suitable for industrial controls, portable GPS systems, point-of-sale terminals, and set-top boxes requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MAX16024LTBZ18+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, and communications applications.
The MAX16023/MAX16024 family delivers integrated battery-backup power and supervisory functions specifically for memory retention and real-time clock applications in space-constrained, low-power systems.
FAQ
What is the reset threshold voltage of the MAX16024LTBZ18+T?
The MAX16024LTBZ18+T has a factory-set reset threshold of 2.32V (typical), with guaranteed minimum 2.243V and maximum 2.425V across temperature. This value is defined in Table 1 of the datasheet under suffix "Z" and ensures reliable reset assertion before critical undervoltage conditions affect downstream 1.8V logic or memory devices. The MAX16024LTBZ18+T uses this threshold to initiate switchover to battery power and assert the active-low RESET signal.
Does the MAX16024LTBZ18+T support adjustable output voltage?
No, the MAX16024LTBZ18+T provides a fixed 1.8V regulated output. The "Z" suffix indicates the 2.32V reset threshold variant, and the "18" suffix denotes the factory-trimmed 1.8V LDO. Adjustable output versions use the "TB_" prefix without voltage suffixes and require an external resistive divider on the SET pin-functionality not implemented in the MAX16024LTBZ18+T. Its output is optimized for direct powering of 1.8V SRAM and RTC ICs.
How does the CEIN/CEOUT gating function work in the MAX16024LTBZ18+T?
In the MAX16024LTBZ18+T, CEIN connects to CEOUT through a low-on-resistance transmission gate during normal operation. When RESET asserts, CEOUT is immediately disabled: if CEIN is low, CEOUT stays low for 12µs (typ) to complete ongoing memory access; if CEIN is high, CEOUT rises instantly. This prevents corrupted writes during brownout. The MAX16024LTBZ18+T implements this with 1.5ns propagation delay and active pull-up to OUT when disconnected.
What is the purpose of the BATT ON output on the MAX16024LTBZ18+T?
The BATT ON output on the MAX16024LTBZ18+T is an active-high signal that goes high only when the device is operating in battery-backup mode-i.e., when VCC has fallen below 2.32V, VCC < VBATT, and the LDO is powered from the backup battery. It provides hardware-level confirmation of switchover without software polling, enabling firmware to trigger data-save routines or illuminate status LEDs. The MAX16024LTBZ18+T drives this output with push-pull logic compatible with 1.8V logic families.
Can the MAX16024LTBZ18+T be used without a backup battery?
Yes, the MAX16024LTBZ18+T operates normally without a backup battery: connect the BATT pin to GND. In this configuration, it functions as a 1.8V LDO with reset supervision and CE gating, but battery switchover and BATT ON indication are disabled. The MAX16024LTBZ18+T maintains full reset timing, low quiescent current (4µA), and LDO regulation-making it suitable for cost-sensitive applications where backup is optional or handled externally.
MAX16024LTBZ18+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.32V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 145ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-TDFN (3x3)
MAX16024LTBZ18+T FAQ
1.How can I place an order for MAX16024LTBZ18+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16024LTBZ18+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 MAX16024LTBZ18+T reliable?
The price and inventory of MAX16024LTBZ18+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16024LTBZ18+T is usually 5 days.
3.What payment methods are accepted for MAX16024LTBZ18+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16024LTBZ18+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16024LTBZ18+T?
MAX16024LTBZ18+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16024LTBZ18+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 MAX16024LTBZ18+T?
For technical support, including MAX16024LTBZ18+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16024LTBZ18+T requirements.
6.How does Aetrix verify that MAX16024LTBZ18+T is sourced from the original manufacturer or authorized distributors?
All MAX16024LTBZ18+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 MAX16024LTBZ18+T meets industry standards.
7.What is the process for return or replacement of MAX16024LTBZ18+T?
All MAX16024LTBZ18+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX16024LTBZ18+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 MAX16024LTBZ18+T part is unused and in its original packaging.
Return procedure for MAX16024LTBZ18+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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