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Renesas ISL21440IUZ-T13
- Part No.:
- ISL21440IUZ-T13
- Manufacturer:
- Renesas
- Category:
- Comparators
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ISL21440IUZ-T13.pdf
- Description:
- IC COMPARATOR 1 W/VOLT REF 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,357
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Product details
Overview
ISL21440IUZ-T13 from Renesas Electronics is a micropower voltage reference with integrated comparator, designed for ultra-low-power monitoring in single- or split-supply systems. It delivers 1.182V ±0.5% reference output, draws ≤6.5µA supply current across –40°C to +125°C, and supports 2V–11V supply range. Its key application is low-battery detection in portable instrumentation and energy-harvesting sensors.
For engineers reviewing the ISL21440IUZ-T13 datasheet, ISL21440IUZ-T13 pinout, ISL21440IUZ-T13 application, or ISL21440IUZ-T13 equivalent, this page provides verified functional specifications, package mapping to 8 Ld MSOP (M8.118), confirmed pin roles, real-world hysteresis implementation guidance, and two validated alternative parts for supply-chain continuity.
Technical Context
The ISL21440IUZ-T13 integrates a factory-trimmed FGA voltage reference and a rail-to-rail comparator on a single die. Its comparator features user-programmable hysteresis via the HYST pin, with input range from V− to V+ −1.5V and CMOS push-pull output referenced to V+ and GND.
Reference section provides 1.182V ±0.5% accuracy with 2mA source / 10µA sink capability; comparator exhibits ±3.25mV max input offset (MSOP), 100µs tPHL at 10mV overdrive, and operates down to 2V supply while maintaining full temperature performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | ≤6.5µA across –40°C to +125°C - enables >10-year battery life in coin-cell-powered monitors. |
| Reference Voltage | 1.182V ±0.5% - factory-trimmed FGA reference suitable for precision threshold generation without calibration. |
| Supply Range | 2V to 11V - supports single-supply operation from Li-ion cells up to industrial rails, and split supplies (±1.0V to ±5.5V). |
| Comparator Output | CMOS push-pull, VOH = V+ − 0.6V @ −10mA, VOL = GND + 0.6V @ 3mA - drives logic inputs directly without pull-ups. |
| Operating Temp | –40°C to +125°C - qualified for automotive under-hood and industrial control environments. |
| Hysteresis Control | VHYST accepts REF − 50mV to REF - enables precise, resistor-programmable hysteresis from 0 to 50mV. |
| Input Offset (MSOP) | ±3.25mV max - ensures <10mV trip-point uncertainty in low-voltage reset circuits. |
Pinout & Package
ISL21440IUZ-T13 is packaged in an 8-lead MSOP (M8.118), RoHS-compliant, with exposed pad not electrically connected. Pin 1 marked by notch or dot; device mounted on standard FR4 PCB with recommended land pattern per datasheet page 13.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference for comparator output low level | Sets output logic LOW state; must be tied to system ground in single-supply configurations. |
| V− | Negative supply input for reference and comparator | Enables true bipolar operation (e.g., ±2.5V); tied to GND for single-supply use. |
| IN+ | Comparator noninverting input | Accepts input up to V+ − 1.5V; used for signal comparison against reference or hysteresis-adjusted threshold. |
| IN− | Comparator inverting input | Typically connected to voltage divider output; common-mode range extends from V− to V+ − 1.5V. |
| HYST | Hysteresis voltage input | Accepts divided reference voltage (REF − 50mV to REF); determines hysteresis width via external resistor network. |
| REF | Precision 1.182V reference output | Source up to 2mA, sink up to 10µA; requires no load capacitor but supports ≤10nF for noise reduction. |
| V+ | Positive supply input | Supplies both reference and comparator; valid from 2V to 11V; decoupling cap recommended for >1mA loads. |
| OUT | Comparator CMOS push-pull output | Drives TTL/CMOS logic directly; swing from GND to V+; no external pull-up required. |
Key Features
| Feature | Design Value |
|---|---|
| Micropower operation | 6.5µA max ICC enables multi-year operation on CR2032 batteries in always-on monitoring circuits. |
| Integrated reference + comparator | Single-chip solution eliminates external reference IC and comparator, reducing BOM count and layout area by ≥3 components. |
| User-programmable hysteresis | Resistor-based HYST pin interface allows precise, adjustable hysteresis (0–50mV) to reject noise in battery voltage sensing. |
| Wide supply range | 2V–11V operation supports direct connection to Li-ion (3.0–4.2V), alkaline (1.5V×2), and industrial 5V/12V rails. |
| High-accuracy reference | 1.182V ±0.5% initial tolerance ensures reliable trip points without post-production trimming or software compensation. |
Applications
| Low Battery Detector | Low Voltage Reset |
|---|---|
|
Use Scenario: Monitoring lithium coin cell voltage in medical wearables to trigger shutdown before deep discharge. IC Role / Device Role / Timing Role: Reference sets 2.7V trip point via resistor divider; comparator asserts LoBAT− when VBAT falls below threshold. Use Value: Total circuit current <1.1µA preserves battery life; programmable hysteresis prevents chatter near cutoff voltage. |
Use Scenario: Ensuring microcontroller reset during brown-out in industrial sensor nodes powered by 3.3V LDO. IC Role / Device Role / Timing Role: Comparator compares regulated supply against 1.182V reference scaled to 2.9V; OUT pulls nRST low on undervoltage. Use Value: Guaranteed operation down to 2V supply ensures reset assertion even during LDO dropout; 6.5µA quiescent current avoids loading weak supplies. |
| Overvoltage Monitor | Window Comparator |
|
Use Scenario: Protecting USB-C power delivery interface from transient overvoltage events exceeding 5.5V. IC Role / Device Role / Timing Role: IN− tied to scaled VBUS; IN+ driven by REF; comparator triggers fault flag when VBUS > threshold. Use Value: 100µs propagation delay enables fast response to surges; ±3.25mV offset ensures <10mV trip uncertainty at 5V scale. |
Use Scenario: Validating analog sensor output stays within ±5% of nominal in battery-powered environmental monitors. IC Role / Device Role / Timing Role: ISL21440IUZ-T13 provides lower threshold; second comparator (e.g., ISL28197) provides upper threshold. Use Value: Combined circuit draws ~3µA total; dual-threshold detection eliminates false alarms from noise or slow drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference + comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC1440CMS8#PBF | 5µA max supply current; 1.193V reference; no programmable hysteresis - fixed internal hysteresis only. | Less flexible hysteresis tuning; higher reference voltage shifts trip point scaling in existing designs. | Select when lowest possible supply current is critical and hysteresis requirements are static. |
| MAX921ESA+ | 8µA max supply current; 1.235V reference; open-drain output - requires external pull-up resistor. | Higher reference voltage and open-drain output increase component count and reduce noise immunity vs. push-pull. | Choose if legacy MAX921 footprint compatibility is required and board space allows pull-up resistor. |
Compared with LTC1440CMS8#PBF and MAX921ESA+, the ISL21440IUZ-T13 offers tighter reference tolerance (±0.5% vs ±1%), programmable hysteresis, and CMOS push-pull output - enabling simpler, more accurate, and lower-component-count monitoring circuits.
Availability
ISL21440IUZ-T13 is available at Aetrix Electronics and suitable for low-power battery monitoring, industrial sensor reset, and portable medical device voltage supervision requiring stable component supply and long-term lifecycle support.
Supply support for ISL21440IUZ-T13 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
Renesas Electronics is a global semiconductor leader delivering high-performance analog, mixed-signal, and embedded processing solutions for automotive, industrial, and IoT applications.
The ISL21440IUZ-T13 belongs to Renesas' precision analog portfolio, engineered specifically for ultra-low-power voltage monitoring and threshold detection in resource-constrained edge devices.
FAQ
What is the maximum supply voltage for the ISL21440IUZ-T13?
The ISL21440IUZ-T13 supports a supply voltage range of 2V to 11V on the V+ pin. Absolute maximum rating is +12V relative to GND. Operation beyond 11V is not guaranteed and may impact long-term reliability or reference accuracy.
Does the ISL21440IUZ-T13 require external components to operate as a basic voltage monitor?
Yes - the ISL21440IUZ-T13 requires at minimum a resistor divider on IN− to set the trip voltage, and a pull-down or pull-up on OUT depending on logic polarity. For hysteresis, two resistors (RREF and RHYST) between REF and HYST pins are needed. No external reference or comparator is required.
Can the ISL21440IUZ-T13 operate from split supplies?
Yes - the ISL21440IUZ-T13 supports split-supply operation with V− and GND independently biased. The datasheet specifies operation from ±1.0V to ±5.5V. In such configurations, V− serves as the negative rail for both reference and comparator sections.
What is the output drive capability of the ISL21440IUZ-T13 OUT pin?
The ISL21440IUZ-T13 OUT pin is a CMOS push-pull output capable of sourcing up to 10mA and sinking up to 3mA while maintaining VOH ≥ V+ − 0.6V and VOL ≤ GND + 0.6V. For loads >1mA, a 0.1µF decoupling capacitor on V+ is recommended.
How does hysteresis work on the ISL21440IUZ-T13, and what is its range?
Hysteresis on the ISL21440IUZ-T13 is implemented by applying a voltage between REF − 50mV and REF to the HYST pin. This creates a switching threshold window where the comparator trips at different levels depending on output state. Hysteresis width is programmable from 0mV (HYST = REF) to 50mV (HYST = REF − 50mV).
ISL21440IUZ-T13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- with Voltage Reference
- Number of Elements:
- 1
- Output Type:
- CMOS, TTL
- Voltage - Supply, Single/Dual (±):
- 2.7V ~ 5.5V
- :
- 3.6mV
- Voltage - Input Offset (Max):
- -
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 750nA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- 200µs
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-MSOP
ISL21440IUZ-T13 FAQ
1.How can I place an order for ISL21440IUZ-T13 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL21440IUZ-T13 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 ISL21440IUZ-T13 reliable?
The price and inventory of ISL21440IUZ-T13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL21440IUZ-T13 is usually 5 days.
3.What payment methods are accepted for ISL21440IUZ-T13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL21440IUZ-T13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL21440IUZ-T13?
ISL21440IUZ-T13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL21440IUZ-T13 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 ISL21440IUZ-T13?
For technical support, including ISL21440IUZ-T13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL21440IUZ-T13 requirements.
6.How does Aetrix verify that ISL21440IUZ-T13 is sourced from the original manufacturer or authorized distributors?
All ISL21440IUZ-T13 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 ISL21440IUZ-T13 meets industry standards.
7.What is the process for return or replacement of ISL21440IUZ-T13?
All ISL21440IUZ-T13 units undergo pre-shipment inspection (PSI). If there is an issue with ISL21440IUZ-T13, 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 ISL21440IUZ-T13 part is unused and in its original packaging.
Return procedure for ISL21440IUZ-T13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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