My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX16034LLB29+T
- Part No.:
- MAX16034LLB29+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 10-WFDFN
- Datasheet:
-
MAX16034LLB29+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 10UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,293
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The MAX16034LLB29+T from Maxim Integrated is a low-power microprocessor supervisory circuit with watchdog timer, power-fail warning, and battery switchover functionality. It features a factory-set 2.93V reset threshold, 1.6s watchdog timeout, active-low push-pull RESET output, operates from 1.2V to 5.5V, and draws only 13µA quiescent current. It is used in portable POS terminals to maintain SRAM data integrity during brownout events.
For engineers reviewing the MAX16034LLB29+T datasheet, MAX16034LLB29+T pinout, MAX16034LLB29+T application, or MAX16034LLB29+T equivalent, key selection criteria include its 10-pin µDFN package, watchdog input (WDI) interface, battery-on indication capability, and guaranteed -40°C to +85°C operation for industrial embedded systems.
Technical Context
The MAX16034LLB29+T integrates a precision 1.235V internal reference for both PFI and RESETIN comparators, a monostable watchdog timer with 1.00–2.25s timeout range, and a low-impedance MOSFET-based VCC/BATT switchover path with <4.6Ω on-resistance at 2.5V. Its push-pull RESET output drives loads up to 20mA while remaining valid down to 1.2V supply.
It implements debounced WDI edge detection - any rising or falling edge clears the watchdog timer - and includes independent power-fail comparator logic that asserts PFO when VPFI falls below 1.235V, with 4µs propagation delay and 1% hysteresis. The device enters battery-backup mode only when both VCC < VTH and VCC < VBATT − 40mV.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.85V (min) to 3.00V (max); factory-trimmed 2.93V typical ensures reliable reset assertion for 3.0V/3.3V systems during brownout |
| Watchdog Timeout | 1.00–2.25s; 1.65s typical enables robust software execution monitoring without false triggers in μP-based POS equipment |
| Supply Current | 13µA typical at 2.8V; enables multi-year battery backup in portable instrumentation with minimal drain |
| Operating Voltage | 1.2V to 5.5V; supports direct interface with Li-ion, coin-cell, and regulated 3.3V/5.0V rails without external level shifting |
| Reset Timeout Period | 140ms (min); guarantees sufficient hold time for μP initialization and memory stabilization after power recovery |
| Output Type | Active-low push-pull RESET; eliminates need for external pull-up resistor and ensures fast, rail-to-rail reset signaling |
| Package | 10-pin µDFN (2mm × 2mm); enables high-density PCB layout in space-constrained handheld devices |
Pinout & Package
MAX16034LLB29+T is housed in a 10-pin, 2mm × 2mm, 0.5mm pitch µDFN package with exposed thermal pad (EP). Pin 1 is marked by a dot; the package is RoHS-compliant and lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 RESET | Active-low push-pull reset output | Asserts low during VCC undervoltage, watchdog timeout, or power failure; holds for ≥140ms after recovery |
| 2 CEIN | Chip-enable input | Passes CE signals to CEOUT during normal operation; disabled during reset to prevent RAM corruption |
| 3 PFI | Power-fail input | Monitors external voltage divider; triggers PFO low when input falls below 1.235V |
| 4 GND | Ground reference | Common return path for all analog and digital functions; connects to EP for thermal dissipation |
| 5 WDI | Watchdog input | Edge-sensitive input; any rising/falling transition resets internal 1.6s timer; no external debounce required |
| 6 PFO | Active-low power-fail output | Push-pull output asserting low on PFI trip or VCC < VTH; provides NMI signal to μP |
| 7 VCC | Main supply input | Accepts 1.2V–5.5V; powers internal circuitry and supplies OUT when above reset threshold |
| 8 OUT | System power output | Sources from VCC normally; switches to BATT during backup mode with <4.6Ω on-resistance at 2.5V |
| 9 BATT | Backup battery input | Connects to coin cell or supercap; enables seamless switchover when VCC drops below VBATT − 40mV |
| 10 CEOUT | Chip-enable output | Low-impedance transmission gate output; mirrors CEIN unless reset is asserted, then held high |
Key Features
| Feature | Design Value |
|---|---|
| Watchdog timer with edge-triggered clear | Eliminates need for periodic software pulses; responds to any state change on WDI, improving fault coverage |
| Independent power-fail comparator | Provides early warning via PFO before VCC reaches reset threshold, enabling graceful shutdown of peripherals |
| Battery switchover with 40mV hysteresis | Prevents oscillation during slow VCC decay; ensures stable OUT voltage during transition between sources |
| 140ms minimum reset timeout | Guarantees μP reset pulse exceeds typical boot-time requirements for ARM Cortex-M and 8051 derivatives |
| 13µA quiescent current in active mode | Extends battery life in always-on portable instruments where supervisor remains powered continuously |
| Push-pull RESET and PFO outputs | Reduces BOM count by eliminating external pull-ups; delivers faster rise/fall times than open-drain alternatives |
Applications
| Portable POS Terminals | Industrial Controllers |
|---|---|
Use Scenario: Battery-backed SRAM retention during AC power loss or battery swap in handheld payment terminals. IC Role / Device Role / Timing Role: Supervisory IC providing VCC monitoring, watchdog supervision, and automatic BATT-to-OUT switchover. Use Value: Prevents transaction data loss by maintaining SRAM voltage >2.0V for >10 seconds using a 3.0V coin cell, enabled by 13µA standby current. |
Use Scenario: Reliable reset and power-fail warning in programmable logic controllers operating in factory environments with noisy 24V DC supplies. IC Role / Device Role / Timing Role: Dual-role supervisor: monitors main 5V rail and secondary 3.3V I/O rail via RESETIN, while issuing PFO interrupt on primary rail collapse. Use Value: Enables deterministic PLC restart within 140ms of undervoltage, meeting IEC 61131-2 response time requirements. |
| Set-Top Boxes | Real-Time Clock Modules |
Use Scenario: Maintaining firmware state and configuration memory during brief grid interruptions in cable/satellite receivers. IC Role / Device Role / Timing Role: Power supervisor with integrated chip-enable gating to protect external CMOS RAM from write corruption during brownout. Use Value: CEIN-to-CEOUT transmission gate blocks spurious CE transitions during reset, preventing invalid register writes to tuner ICs. |
Use Scenario: Preserving RTC registers and oscillator bias during main power removal in smart meters and IoT gateways. IC Role / Device Role / Timing Role: Low-quiescent-current supervisor sourcing RTC VDD from BATT when main supply fails. Use Value: Delivers <0.5µA battery leakage in backup mode (VBATT = 2.8V), enabling >10-year coin-cell lifetime per IEC 62304 Class B requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16034PLB29+T | Same core functionality but features active-low open-drain RESET and PFO outputs instead of push-pull | Requires external pull-up resistors; better suited for wired-OR interrupt buses or level-translating interfaces | Select when interfacing with legacy μPs requiring open-drain reset signaling or shared interrupt lines |
| TPS3808G33DBVR | Single-channel supervisor with 3.08V reset threshold, no watchdog or battery switchover; 1.8µA IQ | Lacks WDI, BATT, CEIN/CEOUT, and PFI/PFO functions; suitable only for basic reset-only applications | Choose only if system requires minimal reset supervision without backup management or watchdog capability |
Compared with MAX16034LLB29+T, the MAX16034PLB29+T offers identical timing and thresholds but requires external pull-ups, increasing BOM count; the TPS3808G33DBVR reduces cost and current draw but removes critical battery-switchover and watchdog safety features needed for POS and industrial control.
Availability
MAX16034LLB29+T is available at Aetrix Electronics and suitable for portable POS terminals, industrial controllers, set-top boxes, and real-time clock modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX16034LLB29+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, sensing, and connectivity applications, with emphasis on reliability and integration for demanding environments.
The MAX16033–MAX16040 family was developed specifically for microprocessor systems needing compact, low-power supervision with battery backup, watchdog, and power-fail warning in space-constrained portable and industrial equipment.
FAQ
What is the factory-set reset threshold voltage for MAX16034LLB29+T?
The MAX16034LLB29+T has a factory-trimmed reset threshold of 2.93V, with guaranteed minimum of 2.85V and maximum of 3.00V over temperature. This value is laser-trimmed during production and applies across the full -40°C to +85°C operating range, ensuring consistent brownout detection for 3.0V/3.3V systems without external adjustment.
Does MAX16034LLB29+T support battery backup for external SRAM?
Yes, MAX16034LLB29+T directly supports battery backup for external SRAM via its OUT pin, which automatically switches from VCC to BATT when VCC falls below the reset threshold and VBATT exceeds VCC by 40mV. In backup mode, it delivers up to 20mA from the battery with <4.6Ω on-resistance, preserving SRAM data integrity without additional FETs or diodes.
How does the watchdog function work on MAX16034LLB29+T?
The MAX16034LLB29+T watchdog monitors the WDI pin: any rising or falling edge resets the 1.6s timeout timer. If WDI remains static longer than the timeout period, RESET asserts for 140ms. The timer clears on every WDI transition - not just periodic pulses - enabling tighter software fault detection in complex loops or interrupt-driven code.
Can MAX16034LLB29+T monitor a secondary power rail?
Yes, MAX16034LLB29+T includes a dedicated RESETIN input referenced to an internal 1.235V comparator. By connecting a resistor divider from the secondary rail to RESETIN, users can set custom reset thresholds (e.g., 5.0V, 12V) using VRTH = 1.235V × (R1/R2 + 1). The device asserts RESET when RESETIN falls below 1.235V, with 1.5µs propagation delay.
What is the purpose of the CEIN and CEOUT pins on MAX16034LLB29+T?
The CEIN and CEOUT pins implement chip-enable gating: during normal operation, CEIN passes through to CEOUT with ~2ns delay; when RESET is asserted, CEOUT is forced high to prevent spurious writes to external CMOS RAM. This feature is critical in systems where power failure could corrupt memory during partial μP initialization - a key requirement for POS and industrial controller designs using MAX16034LLB29+T.
MAX16034LLB29+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:
- 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)
MAX16034LLB29+T FAQ
1.How can I place an order for MAX16034LLB29+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16034LLB29+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 MAX16034LLB29+T reliable?
The price and inventory of MAX16034LLB29+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16034LLB29+T is usually 5 days.
3.What payment methods are accepted for MAX16034LLB29+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16034LLB29+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16034LLB29+T?
MAX16034LLB29+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16034LLB29+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 MAX16034LLB29+T?
For technical support, including MAX16034LLB29+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16034LLB29+T requirements.
6.How does Aetrix verify that MAX16034LLB29+T is sourced from the original manufacturer or authorized distributors?
All MAX16034LLB29+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 MAX16034LLB29+T meets industry standards.
7.What is the process for return or replacement of MAX16034LLB29+T?
All MAX16034LLB29+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX16034LLB29+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 MAX16034LLB29+T part is unused and in its original packaging.
Return procedure for MAX16034LLB29+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX16034LLB29+T Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
