TS7221AILT STMicroelectronics Integrated Circuit (SOT23 (5-Pin)) In Stock
The TS7221AILT is a single BiCMOS rail-to-rail micropower voltage comparator from STMicroelectronics in a SOT-23-5 package. It features an open-drain output, 0.3 nA bias current at 25°C, and a 10 mV maximum input offset voltage for precise threshold detection. Suited for battery-monitoring and wake-up circuits in portable designs.
- Manufacturer
- STMicroelectronics
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- TS7221AILT Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.3417(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of TS7221AILT?
- Rail-to-rail input range and open-drain output allow direct interfacing with logic levels from a single supply in space-constrained designs
- Ultra-low 0.3 nA bias current at 25°C (max 0.6 nA) minimises quiescent power in battery-operated threshold detection circuits
- Single comparator in a compact SOT-23-5 package, simplifying board layout for voltage monitoring, zero-crossing detection, and wake-up applications
What is TS7221AILT used for?
The TS7221AILT is used in battery-powered devices for low-power voltage threshold detection, such as battery under-voltage lockout, supply monitoring, and interrupt wake-up generation for microcontrollers. Its rail-to-rail input capability and open-drain output make it suitable for window comparator configurations and level-shifting between different logic supply domains. The SOT-23-5 footprint fits wearables, IoT sensor nodes, and portable medical instruments where board real estate is limited.
What are the specifications of TS7221AILT?
| Factory Lead Time | 16Weeks |
| YTEOL | 5.57 |
| Amplifier Type | COMPARATOR |
| Average Bias Current-Max (IIB) | 0.0006 µA |
| Bias Current-Max (IIB) @25C | 0.0003 µA |
| Input Offset Voltage-Max | 10000 µV |
| JESD-30 Code | R-PDSO-G5 |
| JESD-609 Code | e4 |
| Number of Functions | 1 |
| Output Type | OPEN-DRAIN |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSOP5/6,.11,37 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, LOW PROFILE, SHRINK PITCH |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Response Time-Nom | 2000ns |
| Supply Current-Max | 0.016mA |
| Supply Voltage Limit-Max | 12V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | BICMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | SOT23 (5-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Malaysia |
Where can I find the TS7221AILT datasheet?
TS7221AILT Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for TS7221AILT?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How low is the bias current of TS7221AILT and why does this matter for battery-powered designs?
TS7221AILT has a maximum bias current of 0.6 nA at 25°C, with a typical value of 0.3 nA. This extremely low bias current means the comparator adds negligible drain to a coin-cell or small LiPo battery, making it ideal for always-on monitoring circuits in wearables, smart tags, and low-duty-cycle sensors where total system leakage current budgets may be under 1 µA.
What output configuration does TS7221AILT use, and how should an external pull-up be sized?
TS7221AILT uses an open-drain output stage, which requires an external pull-up resistor to the desired logic supply. A typical 100 kΩ pull-up to 3.3 V balances power consumption and output rise time for most threshold detection applications. Lower values such as 10 kΩ provide faster edges for interfacing directly with microcontroller interrupt inputs sensitive to slow transitions.
Can TS7221AILT detect a threshold near the supply rails, such as monitoring a 1.8 V supply with a 1.65 V trip point?
Yes. The rail-to-rail input stage of TS7221AILT allows both inputs to swing within a few millivolts of the supply and ground rails, enabling threshold detection at voltages very close to either rail. With a 10 mV maximum input offset voltage, the trip accuracy is sufficient for a 1.65 V threshold on a 1.8 V supply, making it practical for under-voltage lockout monitoring of low-voltage LDO outputs.
What is the lead time for TS7221AILT and what should procurement teams consider?
TS7221AILT has a factory lead time of 16 weeks, which is longer than many standard comparators. Procurement teams should place orders well ahead of production start dates and consider holding safety stock if the design is in high-volume production. Distributors may carry spot inventory that can bridge short-term gaps, but scheduling buffer stock aligned to the 16-week factory cycle reduces supply risk.
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Why Buy from FindMyChip
About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.3417 | $0.34 |
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