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Silicon Labs TSM972CSA+T
- Part No.:
- TSM972CSA+T
- Manufacturer:
- Silicon Labs
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TSM972CSA+T.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,883
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Product details
Overview
TSM972CSA+T from Silicon Labs is a dual, ultra-low-power, open-drain analog comparator with no internal reference, operating from single +2.5V to +11V or dual ±1.25V to ±5.5V supplies. It draws ≤4μA (max) over temperature, features rail-to-rail input range down to V− and within 1.3V of V+, and delivers 12μs propagation delay at 10mV overdrive-ideal for battery-powered threshold detection and level translation.
For engineers reviewing the TSM972CSA+T datasheet, TSM972CSA+T pinout, TSM972CSA+T application, or TSM972CSA+T equivalent, key selection criteria include its dual-comparator-only architecture (no reference), open-drain outputs enabling wired-OR logic, guaranteed quiescent current ≤4μA across −40°C to +85°C, and compatibility with 8-pin SOIC layout and routing.
Technical Context
The TSM972CSA+T implements two independent comparators with open-drain NMOS output stages sinking to V−, requiring external pull-up for logic-level translation. Its input common-mode range extends from V− to (V+ − 1.3V), supporting operation near supply rails without phase reversal.
No internal voltage reference or hysteresis circuitry is integrated-unlike TSM971/TSM973/TSM982-making it suitable for applications where external references or custom hysteresis are preferred. Propagation delay remains stable at 12μs (high-to-low) under 10mV overdrive with 100pF load and 1MΩ pull-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +11V (single) or ±1.25V to ±5.5V (dual)-supports 3V/5V systems and split-rail sensor interfaces. |
| Max Supply Current | 4μA over −40°C to +85°C-enables multi-year operation on coin-cell batteries in always-on monitoring. |
| Input Common-Mode Range | V− to (V+ − 1.3V)-allows direct sensing of signals referenced to negative rail or ground in single-supply mode. |
| Propagation Delay | 12μs at 10mV overdrive-ensures timely response in window detectors and oscillator timing loops. |
| Output Type | Open-drain NMOS sinking to V−-enables wired-OR bus arbitration and level shifting between disparate logic families. |
| Input Offset Voltage | ±10mV max-limits trip-point uncertainty in precision threshold applications without trimming. |
| Input Leakage Current | ±0.01nA typical at 25°C-minimizes error in high-impedance sensor interfaces (e.g., photodiode, thermistor dividers). |
Pinout & Package
Package: 8-pin SOIC (Small Outline Integrated Circuit), 3.9mm × 4.9mm body, JEDEC MS-012 compliant, tape-and-reel packaging (2500 units per reel).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTA | Comparator A open-drain output-must be pulled up externally; sinks current to V−. |
| 2 | V− | Negative supply terminal-connect to GND in single-supply mode; sets output sink reference. |
| 3 | INA+ | Comparator A noninverting input-accepts signals from V− to (V+ − 1.3V); high-impedance node. |
| 4 | INA− | Comparator A inverting input-identical voltage range and impedance as INA+. |
| 5 | INB− | Comparator B inverting input-electrically isolated from INA pins; supports independent signal paths. |
| 6 | INB+ | Comparator B noninverting input-fully differential pair with INB−; no internal reference coupling. |
| 7 | V+ | Positive supply terminal-supplies bias for both comparators; decoupling capacitor recommended. |
| 8 | OUTB | Comparator B open-drain output-functionally identical to OUTA; enables dual independent decision outputs. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent comparators | Two fully isolated channels sharing only V+ and V− rails-enables simultaneous high/low threshold detection without crosstalk. |
| Ultra-low quiescent current | ≤4μA maximum across full industrial temperature range (−40°C to +85°C)-reduces standby power in portable IoT nodes. |
| Rail-to-rail input capability | Inputs operate from V− to (V+ − 1.3V)-eliminates need for level-shifting op-amps when interfacing with sensors tied to supply rails. |
| Open-drain outputs with V− sink | Outputs drive low to V− (not GND)-supports true dual-supply logic interfacing and negative-voltage signal conditioning. |
| No internal reference or hysteresis | Pure comparator core-avoids reference loading errors and allows precise external hysteresis tuning via feedback resistors. |
Applications
| Threshold Detector | Level Translator |
|---|---|
Use Scenario: Monitoring battery voltage against fixed upper/lower thresholds to trigger charge enable/disable or low-battery alerts. IC Role / Device Role / Timing Role: Dual comparator performing independent undervoltage and overvoltage comparisons using resistor-divider inputs. Use Value: Enables discrete, low-power battery protection without MCU intervention-delivers deterministic response with <12μs latency and <4μA static draw. | Use Scenario: Converting ±5V analog control signals from legacy industrial equipment into 3.3V/5V logic-compatible digital flags. IC Role / Device Role / Timing Role: Level-shifting comparator translating bipolar input ranges into unipolar active-high/active-low logic outputs. Use Value: Eliminates discrete diode-or logic and reduces component count-open-drain outputs interface directly with microcontroller GPIOs or FPGA I/O banks. |
| Oscillator Circuit | Battery-Powered System |
Use Scenario: Building relaxation oscillators for clock generation or LED blink timing in energy-constrained devices. IC Role / Device Role / Timing Role: Hysteresis-enabled comparator forming integrator-based oscillator with RC timing network. Use Value: Achieves stable frequency operation below 1μA total system current-leverages open-drain outputs to drive capacitive loads without shoot-through risk. | Use Scenario: Supervising power rails in wearable health monitors or remote environmental sensors powered by CR2032 cells. IC Role / Device Role / Timing Role: Always-on voltage supervisor detecting brown-out conditions and initiating graceful shutdown sequences. Use Value: Extends operational lifetime beyond 5 years on a single coin cell-guaranteed 4μA max supply current ensures predictable battery modeling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX972ESA+ | Pin- and function-compatible dual comparator; identical 4μA max supply current, same SOIC-8 package, and matching input/output specifications. | No internal reference or hysteresis-same use case as TSM972CSA+T for pure dual comparison tasks. | Select MAX972ESA+ when sourcing from legacy MAXIM-designated BOMs or requiring second-source qualification under MIL-PRF-38535 screening. |
| TLV3702IDR | Lower input offset (±3mV vs ±10mV), higher supply current (1.8μA typ but not specified max over temp), rail-to-rail inputs/outputs, push-pull output (not open-drain). | Push-pull output eliminates need for external pull-up but prevents wired-OR; better precision for low-voltage thresholds. | Choose TLV3702IDR when push-pull logic drive is acceptable and tighter offset tolerance is required-requires PCB redesign due to different pinout and output structure. |
Compared with MAX972ESA+, TSM972CSA+T offers identical functionality and drop-in replacement capability; versus TLV3702IDR, it trades precision and output drive simplicity for wired-OR flexibility and guaranteed ultra-low current across temperature-critical for long-life battery systems.
Availability
TSM972CSA+T is available at Aetrix Electronics and suitable for battery-powered systems, industrial sensor interfaces, and portable medical devices requiring stable component supply with guaranteed long-term availability and traceable lot history.
Supply support for TSM972CSA+T 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
Silicon Labs is a fabless semiconductor company specializing in low-power, mixed-signal ICs for IoT, industrial, and consumer applications-with leadership in timing, connectivity, and sensing technologies.
The TSM972CSA+T belongs to Silicon Labs' TSM97x micropower comparator family, designed specifically for energy-constrained systems needing reliable, rail-to-rail analog decision-making without reference or hysteresis overhead.
FAQ
What is the maximum supply voltage rating for the TSM972CSA+T?
The TSM972CSA+T has an absolute maximum supply voltage rating of +12V between V+ and V−, or +12V between V+ and GND in single-supply configurations. Operation beyond this risks permanent damage. The recommended functional range remains +2.5V to +11V for reliable performance across temperature.
Does the TSM972CSA+T include an internal voltage reference?
No, the TSM972CSA+T does not include an internal voltage reference. Unlike TSM971, TSM973, or TSM982 variants, it is a dual-comparator-only device. All reference voltages must be supplied externally-making TSM972CSA+T ideal for designs using precision external references or custom hysteresis networks.
Can the TSM972CSA+T operate from a single 3V supply?
Yes, the TSM972CSA+T operates reliably from a single 3V supply. Electrical characteristics confirm ≤3.8μA max supply current at 3V and −40°C to +85°C, with full functionality across its input common-mode range (0V to 1.7V) and open-drain output swing to V− (GND). This makes TSM972CSA+T well-suited for 3V battery-powered applications.
What is the purpose of the V− pin on the TSM972CSA+T?
The V− pin on the TSM972CSA+T serves as the negative supply terminal and output sink reference. In single-supply operation, it is connected to GND; in dual-supply mode, it accepts a negative voltage down to −5.5V. Critically, both OUTA and OUTB sink current to V−-not GND-enabling true dual-rail logic interfacing and negative-voltage signal conditioning.
Is the TSM972CSA+T pin-compatible with the MAX972 series?
Yes, the TSM972CSA+T is electrically and form-factor identical to the MAX972 family, including pinout, package (8-pin SOIC), supply ranges, propagation delay, and open-drain output behavior. Silicon Labs explicitly positions TSM972CSA+T as an alternate source for MAX972-enabling seamless drop-in replacement without layout or firmware changes.
TSM972CSA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Silicon Labs
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- TSM97x
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- General Purpose
- Number of Elements:
- 2
- Output Type:
- Open-Drain
- Voltage - Supply, Single/Dual (±):
- 2.5V ~ 11V, ±1.25V ~ 5.5V
- :
- 10mV @ 2.5V
- Voltage - Input Offset (Max):
- 0.005µA @ 2.5V
- Current - Input Bias (Max):
- 40mA
- Current - Output (Typ):
- 4µA
- Current - Quiescent (Max):
- 67dB CMRR, 67dB PSRR
- CMRR, PSRR (Typ):
- 12µs
- Propagation Delay (Max):
- 50mV
- Hysteresis:
- 0°C ~ 70°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
TSM972CSA+T FAQ
1.How can I place an order for TSM972CSA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for TSM972CSA+T 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 TSM972CSA+T reliable?
The price and inventory of TSM972CSA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSM972CSA+T is usually 5 days.
3.What payment methods are accepted for TSM972CSA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSM972CSA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TSM972CSA+T?
TSM972CSA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TSM972CSA+T 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 TSM972CSA+T?
For technical support, including TSM972CSA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSM972CSA+T requirements.
6.How does Aetrix verify that TSM972CSA+T is sourced from the original manufacturer or authorized distributors?
All TSM972CSA+T 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 TSM972CSA+T meets industry standards.
7.What is the process for return or replacement of TSM972CSA+T?
All TSM972CSA+T units undergo pre-shipment inspection (PSI). If there is an issue with TSM972CSA+T, 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 TSM972CSA+T part is unused and in its original packaging.
Return procedure for TSM972CSA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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