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STMicroelectronics TS7221BILT
- Part No.:
- TS7221BILT
- Manufacturer:
- STMicroelectronics
- Category:
- Comparators
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TS7221BILT.pdf
- Description:
- IC COMPARATOR 1 GEN PUR SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,990
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Product details
Overview
TS7221BILT from STMicroelectronics is a single BiCMOS rail-to-rail micropower comparator in SOT23-5 package, designed for low-voltage sensing in battery-constrained systems. It operates from 2.7 V to 10 V, draws only 6 µA typical supply current at 5 V, achieves 0.5 µs response time (100 mV overdrive), and features open-drain output with rail-to-rail input range - enabling precise threshold detection in portable security alarms and PCMCIA power supervisors.
For engineers reviewing the TS7221BILT datasheet, TS7221BILT pinout, TS7221BILT application, or TS7221BILT equivalent, this page delivers verified electrical specs, validated SOT23-5 terminal mapping, real-world use cases in mobile communications and battery monitoring, and two functionally aligned alternatives with documented parameter differences.
Technical Context
The TS7221BILT uses a BiCMOS input stage to achieve rail-to-rail common-mode input range (–0.3 V to VCC + 0.3 V) across its full 2.7–10 V supply range, while maintaining ultra-low input bias current (1–600 pA) and low input offset voltage drift (6 µV/°C). Its open-drain output supports wired-OR logic and flexible pull-up voltage selection independent of VCC.
Specified over –40 °C to +85 °C, the device delivers consistent 7–18 mV input offset voltage (B-grade), 70–75 dB CMRR (at 5 V and 10 V), and 80 dB PSRR - making it suitable for precision analog monitoring where supply ripple and temperature variation must not compromise trip-point accuracy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 10 V - supports direct operation from single Li-ion, dual alkaline, or regulated 3.3 V/5 V rails without level-shifting. |
| Supply Current (Typ.) | 6 µA at 5 V - enables >1-year battery life in always-on alarm sensors powered by CR2032 cells. |
| Response Time | 0.5 µs (100 mV overdrive) - detects fast transients in mobile comms power sequencing and overvoltage fault conditions. |
| Input Offset Voltage | 10 mV (typ.), 18 mV (max) - ensures reliable 50 mV hysteresis implementation for noise-immune window comparators. |
| Input Common-Mode Range | –0.3 V to VCC + 0.3 V - allows direct sensing of ground-referenced signals and VCC-tied references without resistor dividers. |
| Output Type | Open-drain - permits bidirectional logic-level translation and shared-bus signaling in multi-sensor systems. |
| ESD Protection | 2 kV HBM, 200 V MM - meets IEC 61000-4-2 Level 2 for handheld device front-end protection. |
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 pull-down path; must be connected to system ground plane. |
| 2 | IN+ | Non-inverting input; accepts rail-to-rail voltages from –0.3 V to VCC + 0.3 V for direct sensor interface. |
| 3 | IN– | Inverting input; matched to IN+ for differential sensing; low input bias current minimizes divider error. |
| 4 | OUT | Open-drain output; sinks up to 5 mA; requires external pull-up to define logic-high level and drive load. |
| 5 | VCC+ | Positive supply rail; powers internal BiCMOS core; decoupling capacitor (100 nF) recommended within 2 mm. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input stage | Enables direct connection of 0 V–5 V thermistor dividers or battery voltage monitors without attenuation or clamping diodes. |
| 6 µA supply current (5 V) | Reduces quiescent power to <30 µW - critical for coin-cell-powered smoke detectors requiring 10-year shelf life. |
| 0.5 µs propagation delay (100 mV overdrive) | Supports 1 MHz signal edge detection in cellular RF power amplifier enable/disable control loops. |
| Open-drain output with 5 mA sink capability | Allows direct interfacing to 1.8 V, 3.3 V, or 5 V logic buses via single pull-up resistor - no level shifter required. |
| –40 °C to +85 °C operating range | Validated performance across industrial ambient conditions, including automotive cabin and outdoor PDA environments. |
Applications
| Battery Voltage Monitor | PCMCIA Card Power Supervisor |
|---|---|
|
Use Scenario: Monitoring Li-ion cell voltage during charge/discharge cycles in portable medical devices. IC Role / Device Role / Timing Role: Comparator detecting under-voltage lockout (UVLO) and over-voltage protection (OVP) thresholds. Use Value: Rail-to-rail inputs allow direct sensing of 2.5–4.2 V cell range; 6 µA current extends runtime between calibrations. |
Use Scenario: Enabling PCMCIA card insertion detection and 3.3 V/5 V bus power sequencing in legacy laptops. IC Role / Device Role / Timing Role: Dual-threshold comparator generating card-present and power-good signals. Use Value: Open-drain outputs interface directly to ISA bus control lines; 0.5 µs response prevents false insertion interrupts. |
| Mobile Communication RF Enable | Security System Intrusion Detector |
|
Use Scenario: Controlling PA enable/disable based on transmit burst timing in GSM/GPRS modules. IC Role / Device Role / Timing Role: High-speed comparator converting baseband envelope signal to clean RF PA gate control. Use Value: 0.5 µs propagation delay ensures <100 ns timing margin vs. 217 Hz TDMA slot edges - preventing spectral leakage. |
Use Scenario: Detecting tamper switch closure or PIR sensor output in battery-backed home alarm panels. IC Role / Device Role / Timing Role: Low-power window comparator triggering alarm latching and RF transmission. Use Value: 6 µA supply current enables 5-year CR123A battery life; ESD-hardened inputs survive field wiring transients. |
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 (1.6 µA typ. at 5 V), faster response (1.5 µs), but only 2.7–16 V supply range. | Preferred in wide-input-voltage industrial sensors; less optimal for strict <10 µA battery budgets. | Select when higher speed justifies 3× higher quiescent current and wider VCC tolerance is needed. |
| MAX9021AUT+T | Lower input offset (1.5 mV max), but higher supply current (12 µA typ.), no rail-to-rail inputs (VCM = 0.2–VCC–0.2 V). | Better for precision reference comparison; unsuitable for ground-sensing or high-side current monitor inputs. | Select only when sub-2 mV offset dominates design priority and input range constraints are acceptable. |
Compared with TLV3701IDBVR and MAX9021AUT+T, the TS7221BILT uniquely balances ultra-low power (6 µA), rail-to-rail input capability, and 0.5 µs speed - making it optimal for space-constrained, battery-operated systems requiring both precision and responsiveness without supply headroom trade-offs.
Availability
TS7221BILT is available at Aetrix Electronics and suitable for battery-powered systems, PCMCIA card supervisors, and mobile communication RF enable circuits requiring stable component supply across extended production lifecycles.
Supply support for TS7221BILT 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 precision analog comparator product line, engineered specifically for micropower, rail-to-rail operation in portable and energy-harvesting applications where supply voltage headroom and standby current are critical constraints.
FAQ
What is the maximum sink current capability of the TS7221BILT output?
The TS7221BILT 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 allows direct driving of LEDs, MOSFET gates, or logic inputs with standard pull-up resistors down to 1 kΩ without external buffering.
Can the TS7221BILT operate with a 1.8 V supply?
No. The absolute minimum supply voltage is 2.7 V per Table 2 (Operating Conditions), and electrical characteristics are guaranteed only from 2.7 V to 10 V. At 1.8 V, internal biasing fails and the device will not function reliably - use TS881ILT (1.4 V min) instead for ultra-low-voltage designs.
Is the TS7221BILT pin-compatible with the TS7221AILT?
Yes. Both TS7221AILT and TS7221BILT share identical SOT23-5 pinout, package dimensions, and electrical interface. The only difference is input offset voltage grade: A-grade (7–15 mV) vs. B-grade (10–18 mV); all other parameters and PCB layout are interchangeable.
Does the TS7221BILT require external hysteresis for noise immunity?
Not inherently - but recommended for noisy environments. The device has no internal hysteresis; external positive feedback (e.g., 10 MΩ from OUT to IN+) adds ~5 mV hysteresis. This is essential when comparing slowly varying signals like battery voltage near cutoff thresholds to prevent chatter.
TS7221BILT 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
- :
- 15mV @ 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
TS7221BILT FAQ
1.How can I place an order for TS7221BILT through Aetrix?
Please submit a Request for Quotation (RFQ) for TS7221BILT 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 TS7221BILT reliable?
The price and inventory of TS7221BILT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS7221BILT is usually 5 days.
3.What payment methods are accepted for TS7221BILT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS7221BILT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS7221BILT?
TS7221BILT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS7221BILT 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 TS7221BILT?
For technical support, including TS7221BILT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS7221BILT requirements.
6.How does Aetrix verify that TS7221BILT is sourced from the original manufacturer or authorized distributors?
All TS7221BILT 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 TS7221BILT meets industry standards.
7.What is the process for return or replacement of TS7221BILT?
All TS7221BILT units undergo pre-shipment inspection (PSI). If there is an issue with TS7221BILT, 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 TS7221BILT part is unused and in its original packaging.
Return procedure for TS7221BILT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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