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STMicroelectronics TS7221AILT
- Part No.:
- TS7221AILT
- Manufacturer:
- STMicroelectronics
- Category:
- Comparators
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TS7221AILT.pdf
- Description:
- IC COMPARATOR 1 GEN PUR SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,720
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Product details
Overview
TS7221AILT from STMicroelectronics is a single BiCMOS rail-to-rail micropower comparator in SOT23-5 package, featuring open-drain output, 6 µA supply current at 5 V, 0.5 µs response time at 5 V, and rail-to-rail input voltage range from (VCC–) –0.3 V to (VCC+) +0.3 V. It is designed for low-power threshold detection in battery-powered portable electronics.
For engineers reviewing the TS7221AILT datasheet, TS7221AILT pinout, TS7221AILT application, or TS7221AILT equivalent, key selection criteria include micropower consumption (<10 µA), open-drain logic compatibility, rail-to-rail input operation across 2.7–10 V supplies, and guaranteed performance over –40 °C to +85 °C.
Technical Context
The TS7221AILT employs a BiCMOS input stage enabling rail-to-rail common-mode input voltage range (–0.3 V to VCC + 0.3 V) with ultra-low input bias current (1–600 pA) and low input offset voltage (7–18 mV). Its open-drain output supports flexible pull-up configurations and wired-OR logic interfacing.
It operates across 2.7 V to 10 V supply rails with stable propagation delay (0.4–0.5 µs at 100 mV overdrive) and high PSRR (80 dB) and CMRR (75 dB at 10 V), making it suitable for noisy, wide-input-voltage environments where precision thresholding is required without external level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 10 V - supports direct connection to Li-ion, 3.3 V, and 5 V rails without regulation |
| Supply Current (Typ.) | 6 µA at 5 V - enables multi-year battery life in always-on sensing nodes |
| Response Time | 0.5 µs at 100 mV overdrive - sufficient for fast wake-up and event-triggered power management |
| Input Offset Voltage | 7–18 mV (A-grade) - defines minimum detectable differential voltage in precision threshold circuits |
| Input Bias Current | 1–600 pA - preserves signal integrity in high-impedance sensor interfaces (e.g., photodiodes, thermistors) |
| Common-Mode Range | –0.3 V to VCC + 0.3 V - allows direct sensing of signals near ground or supply rails |
| ESD Protection | 2 kV HBM - provides robustness during board handling and system integration |
Pinout & Package
SOT23-5 package: 2.9 mm × 2.8 mm × 1.3 mm body, 0.95 mm lead pitch, surface-mount, RoHS-compliant ECOPACK®.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC– (GND) | Ground reference for internal circuitry and output sink path |
| 2 | IN+ | Non-inverting input - accepts rail-to-rail analog signals up to VCC + 0.3 V |
| 3 | IN– | Inverting input - matched to IN+ for differential threshold comparison |
| 4 | VCC+ | Positive supply rail - powers internal BiCMOS core and sets output high-level ceiling |
| 5 | OUT | Open-drain output - requires external pull-up; enables level translation and wired-OR bus operation |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input stage | Enables direct interface with sensors operating at ground or supply rail - eliminates need for input biasing resistors |
| 6 µA typical supply current | Reduces quiescent power by >90% vs. standard comparators - critical for coin-cell and energy-harvesting systems |
| 0.5 µs propagation delay at 100 mV overdrive | Supports real-time battery voltage monitoring and fast fault detection in portable devices |
| Open-drain output with 5 mA sink capability | Allows flexible logic-level translation (e.g., 1.8 V MCU detecting 5 V event) and shared interrupt bus design |
| –40 °C to +85 °C operating range | Validated for industrial and consumer portable equipment deployed in variable ambient conditions |
Applications
| Battery Voltage Monitor | Notebook Power Sequencing |
|---|---|
Use Scenario: Detecting low-battery condition in lithium-polymer powered handheld devices before shutdown. IC Role / Device Role / Timing Role: Threshold comparator comparing battery voltage against a precision reference (e.g., internal bandgap or resistor divider). Use Value: 6 µA quiescent current extends standby runtime; rail-to-rail input ensures accurate detection down to 2.7 V cutoff. | Use Scenario: Controlling power-up sequence of CPU, GPU, and I/O rails in ultraportable notebooks. IC Role / Device Role / Timing Role: Supervisory comparator generating reset or enable signals when each rail reaches its target voltage. Use Value: Open-drain output allows wired-OR of multiple enable signals; 0.5 µs response ensures tight timing margins in multi-rail sequencing. |
| PCMCIA Card Detection | Mobile Device Intrusion Alarm |
Use Scenario: Sensing insertion/removal of PCMCIA cards via mechanical switch closure to ground. IC Role / Device Role / Timing Role: Edge-detecting comparator converting switch state into clean digital interrupt signal for host controller. Use Value: Input bias current <600 pA prevents false triggering from leakage; 2.7–10 V operation matches legacy PCMCIA 3.3 V/5 V bus standards. | Use Scenario: Monitoring tamper switch or accelerometer output to trigger security alert on unauthorized enclosure opening. IC Role / Device Role / Timing Role: Low-power window comparator detecting out-of-range motion or contact break events. Use Value: 2 kV HBM ESD rating withstands handling during field service; micropower mode enables always-on monitoring without draining backup battery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar micropower rail-to-rail comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV3701IDBVR | Higher supply current (1.3 µA typ. at 5 V), faster response (240 ns), no rail-to-rail inputs (VCM = 0.2 V to VCC – 0.2 V) | Requires input biasing for ground-sensing; better suited for high-speed, non-rail-to-rail signal paths | Select when speed outweighs power savings and input range is constrained above ground |
| MAX9021AXK+T | Lower supply current (350 nA), slower response (5 µs), rail-to-rail inputs, push-pull output (no external pull-up needed) | Eliminates pull-up resistor but lacks wired-OR capability; optimized for ultra-low-power, low-bandwidth sensing | Select when minimizing component count and sub-µA current dominates over speed and bus flexibility |
Compared with TLV3701IDBVR and MAX9021AXK+T, the TS7221AILT uniquely balances sub-10 µA consumption, true rail-to-rail input operation, and open-drain output - making it optimal for battery-powered systems requiring both precision ground-referenced sensing and flexible logic interfacing.
Availability
TS7221AILT is available at Aetrix Electronics and suitable for battery-powered systems, notebook power management, PCMCIA card detection, and mobile security alarms requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TS7221AILT 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.
The TS7221 belongs to ST's micropower analog comparator product line, engineered specifically for space-constrained, battery-operated portable electronics demanding rail-to-rail input accuracy and nanowatt-level quiescent power.
FAQ
What is the maximum sink current capability of the TS7221AILT output?
The TS7221AILT open-drain output is specified to sink up to 5 mA while maintaining VOL ≤ 0.45 V at 5 V supply and –40 °C to +85 °C. This enables direct driving of LEDs, small MOSFET gates, or logic inputs with standard pull-up resistors (e.g., 10 kΩ to 3.3 V yields ~0.33 mA load).
Does the TS7221AILT require an external reference voltage for operation?
No - the TS7221AILT is a standalone comparator that compares voltages applied directly to its IN+ and IN– pins. It does not integrate a reference; users must provide an external reference (e.g., resistor divider, bandgap IC, or sensor output) to establish the threshold voltage.
Can the TS7221AILT operate from a 1.8 V supply?
No - the absolute minimum supply voltage is 2.7 V per the datasheet's operating conditions table. At 1.8 V, internal BiCMOS circuitry cannot bias correctly, resulting in undefined output behavior and failure to meet specified propagation delay or input range.
Is the TS7221AILT pin-compatible with other SOT23-5 comparators like the LMV331?
No - although both use SOT23-5 packages, pin assignments differ: TS7221AILT uses Pin 1 = GND, Pin 2 = IN+, Pin 3 = IN–, Pin 4 = VCC+, Pin 5 = OUT; LMV331 uses Pin 1 = OUT, Pin 2 = IN–, Pin 3 = IN+, Pin 4 = GND, Pin 5 = VCC+. Direct replacement requires PCB layout modification.
TS7221AILT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- SC-74A, SOT-753
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 1
- Output Type:
- Open-Drain
- Voltage - Supply, Single/Dual (±):
- 2.7V ~ 10V
- :
- 7mV @ 5V
- Voltage - Input Offset (Max):
- 300pA @ 5V
- Current - Input Bias (Max):
- 30mA
- Current - Output (Typ):
- 16µA
- Current - Quiescent (Max):
- 70dB CMRR, 80dB PSRR
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- SOT-23-5
TS7221AILT FAQ
1.How can I place an order for TS7221AILT through Aetrix?
Please submit a Request for Quotation (RFQ) for TS7221AILT 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 TS7221AILT reliable?
The price and inventory of TS7221AILT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS7221AILT is usually 5 days.
3.What payment methods are accepted for TS7221AILT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS7221AILT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS7221AILT?
TS7221AILT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS7221AILT 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 TS7221AILT?
For technical support, including TS7221AILT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS7221AILT requirements.
6.How does Aetrix verify that TS7221AILT is sourced from the original manufacturer or authorized distributors?
All TS7221AILT 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 TS7221AILT meets industry standards.
7.What is the process for return or replacement of TS7221AILT?
All TS7221AILT units undergo pre-shipment inspection (PSI). If there is an issue with TS7221AILT, 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 TS7221AILT part is unused and in its original packaging.
Return procedure for TS7221AILT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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