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Analog Devices Inc./Maxim Integrated MAX9644EBS+TG45
- Part No.:
- MAX9644EBS+TG45
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 4-WFBGA, CSPBGA
- Datasheet:
-
MAX9644EBS+TG45.pdf
- Description:
- IC COMPARATOR 1 GEN PUR 4UCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,275
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Product details
Overview
MAX9644EBS+TG45 from Maxim Integrated is a nanoPower single comparator with integrated 0.2V precision reference, noninverting input configuration, and open-drain output-designed for ultra-low-power, space-constrained portable electronics. It operates from 1.0V to 5.5V supply, draws only 700nA max supply current, supports -0.3V to +5.5V input voltage range independent of VCC, and is specified over -40°C to +85°C.
For engineers reviewing the MAX9644EBS+TG45 datasheet, MAX9644EBS+TG45 pinout, MAX9644EBS+TG45 application, or MAX9644EBS+TG45 equivalent, key selection criteria include its 4-bump UCSP (1mm × 1mm) package, internal 1% accurate 0.2V reference, 15µs propagation delay, RF-immune input stage, and power-down high-impedance inputs enabling flexible battery-saving architectures.
Technical Context
The MAX9644EBS+TG45 implements a BiCMOS input stage that enables input voltages up to +5.5V even when VCC = 0V-eliminating clamping diodes and preserving high input impedance during power-down. Its internal 0.2V reference is trimmed to ±1% at +25°C and exhibits 6µV/°C tempco, enabling stable threshold detection across temperature.
This device uses an open-drain output requiring external pullup, supporting level-shifting between disparate logic domains. Propagation delay remains stable at 15µs (typ) under ±100mV overdrive, with fall time of 14ns into 10pF load-optimized for low-frequency sensing rather than high-speed signaling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.0V to 5.5V - enables direct interface with sub-1.2V microcontrollers and single-cell Li-ion/Li-poly systems |
| Max Supply Current | 700nA - extends battery life in always-on sensor monitoring circuits beyond years |
| Input Voltage Range | -0.3V to +5.5V independent of VCC - allows direct sensing of signals exceeding supply rail without external attenuation |
| Reference Voltage | 200mV ±1% (25°C), ±3.5% (-40°C to +85°C) - provides stable trip point for low-voltage battery monitoring or wake-up thresholds |
| Propagation Delay | 15µs - sufficient for slow-changing analog signals like battery voltage, temperature, or ambient light |
| Hysteresis | ±0.9mV - suppresses noise-induced false triggering in noisy portable environments |
| Operating Temperature | -40°C to +85°C - qualified for industrial-grade portable medical devices and ruggedized consumer gear |
Pinout & Package
The MAX9644EBS+TG45 is housed in a 4-bump UCSP package (1mm × 1mm × 0.6mm), with bumps on bottom and top mark "+AGL". This ultra-compact die-scale package occupies the footprint of two 0402 resistors and requires land pattern per Maxim Application Note 1891 (Document No. 21-0789).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | OUT | Open-drain comparator output - must be pulled up externally; supports mixed-voltage I/O and wired-OR logic |
| A2 | IN | Noninverting input - accepts signals from -0.3V to +5.5V regardless of VCC; high-Z even when powered down |
| B1 | VCC | Power-supply input - bypass to GND with 0.1µF capacitor close to pin to suppress switching transients |
| B2 | GND | Ground reference - shared return path for VCC, IN, and OUT; critical for noise immunity in compact layouts |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small 4-bump UCSP | 1mm × 1mm footprint - enables placement in tight spaces such as smartphone bezels or wearable sensor modules |
| Internal 0.2V reference | Trimmed to ±1% accuracy at +25°C - eliminates need for external reference or resistor divider in low-threshold detection |
| Input overvoltage tolerance | Supports VIN > VCC by up to 5.2V - removes requirement for input protection circuitry in multi-rail systems |
| RF-immune input stage | On-chip filtering rejects cellular, Wi-Fi, and Bluetooth band interference - improves reliability in handheld RF environments |
| Power-down input impedance | Maintains high-Z inputs at VCC = 0V - permits safe signal routing through unpowered ICs in dynamic power-gating schemes |
Applications
| Battery Voltage Monitoring | Low-Power Wake-Up Detection |
|---|---|
Use Scenario: Monitoring single-cell Li-ion battery voltage to trigger system shutdown before deep discharge. IC Role / Device Role / Timing Role: Comparator with fixed 0.2V reference scaled via resistor divider to detect ~3.0V threshold; open-drain output drives MCU interrupt pin. Use Value: 700nA quiescent current ensures negligible impact on battery self-discharge; input range accommodates full battery swing (2.5V–4.2V) without level shifting. |
Use Scenario: Detecting ambient light or motion-triggered analog signal to wake sleeping microcontroller in smartwatch. IC Role / Device Role / Timing Role: Noninverting comparator comparing sensor output against 0.2V reference; output asserts low to signal wake event. Use Value: Power-down high-Z inputs prevent loading of passive sensors during sleep; 15µs delay ensures timely response without excessive power overhead. |
| Portable Medical Sensor Thresholding | Electronic Toy Signal Conditioning |
Use Scenario: Converting analog output from disposable glucose or pulse oximeter sensor into digital alert signal. IC Role / Device Role / Timing Role: Threshold detector using internal 0.2V reference to identify clinically relevant signal excursions; open-drain output interfaces directly to low-voltage MCU GPIO. Use Value: ±3.5% reference stability over -40°C to +85°C ensures consistent trip points across clinical use environments; UCSP package fits inside compact disposable housing. |
Use Scenario: Interpreting button press or tilt-switch closure in battery-powered educational toy with no external components. IC Role / Device Role / Timing Role: Simple voltage-level translator: switch closure pulls IN above 0.2V, causing open-drain OUT to go low and activate MCU input. Use Value: Eliminates need for external pullup resistor and reference - reduces BOM count and PCB area in cost-sensitive, high-volume toys. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar comparator-with-reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX9645EBS+G45 | Inverting input configuration; identical reference, package, and supply specs | Requires signal polarity inversion in circuit layout; same power/performance profile | Select when input signal polarity must be inverted relative to threshold |
| TLV3691DSER | 0.2V reference, SOT-23-5 package, 600nA max ICC, but no input overvoltage tolerance beyond VCC | Lacks -0.3V to +5.5V input range; requires input clamping or attenuation for overvoltage signals | Choose only if board space allows SOT-23 and input signals stay within VCC rails |
Compared with MAX9645EBS+G45 and TLV3691DSER, the MAX9644EBS+TG45 uniquely combines noninverting operation, 4-bump UCSP size, and rail-to-rail input capability-making it optimal for space-constrained, multi-voltage portable systems where signal integrity and minimal external components are critical.
Availability
MAX9644EBS+TG45 is available at Aetrix Electronics and suitable for battery voltage monitoring, low-power wake-up detection, portable medical sensor thresholding, and electronic toy signal conditioning requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for MAX9644EBS+TG45 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 demanding industrial, medical, and portable applications.
The MAX9644EBS+TG45 belongs to the nanoPower comparator family engineered specifically for ultra-low-quiescent-current, miniature-footprint sensing in battery-operated portable electronics-prioritizing micropower operation, input flexibility, and integration over speed or drive strength.
FAQ
What is the function of the internal 0.2V reference in the MAX9644EBS+TG45?
The internal 0.2V reference in the MAX9644EBS+TG45 serves as a precise, temperature-compensated threshold voltage for the comparator's noninverting input. Trimmed to ±1% accuracy at +25°C and exhibiting only 6µV/°C drift, it eliminates the need for external resistive dividers or references in low-voltage detection applications-enabling direct use in battery monitoring, wake-up circuits, and sensor interfaces where accuracy and component count matter. The MAX9644EBS+TG45 leverages this reference to deliver repeatable trip points across its full operating temperature range.
Does the MAX9644EBS+TG45 support input voltages higher than its supply voltage?
Yes, the MAX9644EBS+TG45 supports input voltages from -0.3V to +5.5V independent of VCC-meaning it can accept signals exceeding its supply rail (e.g., 5V input while VCC = 1.8V). This is enabled by its innovative BiCMOS input stage without ESD diode clamps to VCC. Unlike conventional comparators limited to ~0.3V above VCC, the MAX9644EBS+TG45 safely handles overvoltage conditions without external protection, simplifying design in multi-rail portable systems. This capability is fully specified and tested across temperature.
What is the purpose of the G45 suffix in MAX9644EBS+TG45?
Within Maxim's ordering nomenclature, the "G45" suffix in MAX9644EBS+TG45 denotes a protective die coating applied to the UCSP package-enhancing moisture resistance and mechanical robustness for use in harsh or high-reliability portable environments. The "T" preceding G45 indicates tape-and-reel packaging for automated assembly. This coating does not affect electrical performance but improves long-term reliability in consumer and medical devices subject to thermal cycling or humidity exposure. The MAX9644EBS+TG45 retains all specified electrical characteristics including input leakage, propagation delay, and reference accuracy.
Can the MAX9644EBS+TG45 operate from a 1.0V supply?
Yes, the MAX9644EBS+TG45 is fully specified to operate from VCC = 1.0V to 5.5V, with supply current as low as 400nA (typ) at 1.0V. Its open-drain output delivers VOL ≤ 0.2V at ISINK = 50µA under these conditions, ensuring reliable logic-level assertion into standard CMOS inputs. This 1.0V minimum supply enables direct integration with next-generation ultra-low-voltage microcontrollers and energy-harvesting subsystems-making the MAX9644EBS+TG45 suitable for applications where minimizing system-level power is paramount.
How does the MAX9644EBS+TG45 behave when powered down (VCC = 0V)?
When VCC = 0V, the MAX9644EBS+TG45 maintains high-impedance inputs-allowing external signals to pass through without loading or distortion-even while unpowered. This behavior enables flexible power-gating architectures in portable electronics, where subsystems may be selectively powered down without disrupting signal routing. The output remains in high-impedance state (open-drain off), preventing contention. This feature is guaranteed by design and verified across temperature, distinguishing the MAX9644EBS+TG45 from conventional comparators that exhibit input leakage or latch-up when unpowered.
MAX9644EBS+TG45 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 4-WFBGA, CSPBGA
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- General Purpose
- Number of Elements:
- 1
- Output Type:
- Open-Drain
- Voltage - Supply, Single/Dual (±):
- 1V ~ 5.5V
- :
- -
- Voltage - Input Offset (Max):
- 0.015µA
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 1.1µA
- Current - Quiescent (Max):
- 53dB PSRR
- CMRR, PSRR (Typ):
- 15µs
- Propagation Delay (Max):
- 0.9mV
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 4-UCSP (1.05x1.05)
MAX9644EBS+TG45 FAQ
1.How can I place an order for MAX9644EBS+TG45 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9644EBS+TG45 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 MAX9644EBS+TG45 reliable?
The price and inventory of MAX9644EBS+TG45 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9644EBS+TG45 is usually 5 days.
3.What payment methods are accepted for MAX9644EBS+TG45?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9644EBS+TG45 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9644EBS+TG45?
MAX9644EBS+TG45 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9644EBS+TG45 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 MAX9644EBS+TG45?
For technical support, including MAX9644EBS+TG45 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9644EBS+TG45 requirements.
6.How does Aetrix verify that MAX9644EBS+TG45 is sourced from the original manufacturer or authorized distributors?
All MAX9644EBS+TG45 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 MAX9644EBS+TG45 meets industry standards.
7.What is the process for return or replacement of MAX9644EBS+TG45?
All MAX9644EBS+TG45 units undergo pre-shipment inspection (PSI). If there is an issue with MAX9644EBS+TG45, 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 MAX9644EBS+TG45 part is unused and in its original packaging.
Return procedure for MAX9644EBS+TG45:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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