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Silicon Labs TSM933CSA+T
- Part No.:
- TSM933CSA+T
- Manufacturer:
- Silicon Labs
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TSM933CSA+T.pdf
- Description:
- IC COMPARATOR 2 W/VOLT REF 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,762
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Product details
Overview
TSM933CSA+T from Silicon Labs is a dual-channel micropower analog comparator with integrated 1.182V ±2% reference and adjustable hysteresis, operating from +2.5V to +11V single supply or ±1.25V to ±5.5V dual supply. It draws ≤6μA max supply current over temperature, delivers 12μs propagation delay at 10mV overdrive, and features push-pull TTL/CMOS-compatible outputs sourcing/sinking up to 40mA - ideal for battery-powered window detectors and low-voltage threshold monitoring.
For engineers reviewing the TSM933CSA+T datasheet, TSM933CSA+T pinout, TSM933CSA+T application, or TSM933CSA+T equivalent, key selection criteria include its dual-comparator architecture with internal reference, guaranteed hysteresis capability via dedicated HYST pin, rail-to-rail input range (V− to V+ − 1.3V), and SOIC-8 packaging suitable for space-constrained industrial sensor interfaces and portable power management systems.
Technical Context
The TSM933CSA+T implements two independent high-precision comparators sharing a common internal 1.182V reference and hysteresis control pin (HYST), enabling synchronized trip-point tuning without external feedback networks. Its input stage supports common-mode voltages from V− to V+ − 1.3V and exhibits ±10mV input offset voltage and <5nA input leakage over temperature.
Output stages use crowbar-current-free push-pull logic compatible with TTL/CMOS loads, delivering VOH ≥ V+ − 0.4V and VOL ≤ V− + 0.4V at rated sink/source currents. The HYST pin accepts 0–50mV below REF to program hysteresis bands up to 100mV, with design equations provided for resistor-based configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +11V (single) or ±1.25V to ±5.5V (dual) - enables direct operation from Li-ion, 3.3V, or 5V rails without level-shifting. |
| Max Supply Current | 6μA over −40°C to +85°C - ensures multi-year battery life in always-on sensing nodes. |
| Propagation Delay | 12μs at 10mV overdrive - supports fast response in overvoltage/undervoltage fault detection. |
| Reference Voltage | 1.182V ±2% (0°C to +70°C) - provides stable trip-point anchor for precision thresholding without external references. |
| Input Common-Mode Range | V− to V+ − 1.3V - allows direct sensing of signals near ground or supply rails in single-supply systems. |
| Output Drive | 40mA continuous source/sink - directly drives LEDs, MOSFET gates, or logic inputs without buffer stages. |
| Hysteresis Control | Dedicated HYST pin accepting REF − 50mV to REF - enables precise, resistor-programmable hysteresis up to 100mV without feedback resistors across outputs. |
Pinout & Package
Package: 8-pin SOIC (Small Outline Integrated Circuit), JEDEC MS-012 compliant, 3.9mm × 4.9mm footprint, 1.27mm pitch, surface-mount.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference; tied to V− in single-supply mode; defines output swing floor (V+ to GND). |
| 2 | OUTA | Comparator A push-pull output; sinks/sources up to 40mA; TTL/CMOS-compatible voltage levels. |
| 3 | V− | Negative supply rail; connected to GND in single-supply operation; sets reference baseline for REF and inputs. |
| 4 | INA+ | Comparator A noninverting input; supports rail-to-rail common-mode range (V− to V+ − 1.3V). |
| 5 | HYST | Hysteresis control input; voltage between REF − 50mV and REF sets hysteresis band width. |
| 6 | REF | 1.182V ±2% reference output referenced to V−; sources/sinks up to 25μA/15μA. |
| 7 | V+ | Positive supply rail; accepts +2.5V to +11V (single) or ±1.25V to ±5.5V (dual) configurations. |
| 8 | OUTB | Comparator B push-pull output; electrically identical to OUTA; enables dual-threshold or window detection. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | ≤6μA max over −40°C to +85°C - extends battery life in remote sensors and wearables. |
| Dedicated hysteresis pin | HYST pin accepts REF − 50mV to REF, enabling precise, resistor-programmable hysteresis without output feedback paths. |
| Rail-to-rail input capability | Input common-mode range extends from V− to V+ − 1.3V - eliminates need for input biasing in single-supply designs. |
| Push-pull output stage | No crowbar current during switching; drives TTL/CMOS loads directly with 40mA source/sink capability. |
| Integrated precision reference | 1.182V ±2% reference (0°C to +70°C) with 100μVRMS noise - replaces external reference ICs in compact threshold detectors. |
Applications
| Threshold Detector | Window Comparator |
|---|---|
Use Scenario: Monitoring battery voltage against fixed upper/lower limits to trigger low-battery warning or shutdown. IC Role / Device Role / Timing Role: Dual comparator compares VIN against REF-derived thresholds; OUTA and OUTB generate active-low undervoltage/overvoltage flags. Use Value: Eliminates external reference and hysteresis resistors; 6μA supply current enables years of operation on coin-cell batteries. | Use Scenario: Validating that a 5V system supply remains within 4.5V–5.5V tolerance band before enabling downstream circuitry. IC Role / Device Role / Timing Role: TSM933CSA+T implements dual-threshold detection using shared REF and HYST pin to set hysteresis on both comparators. Use Value: Single SOIC-8 device replaces discrete op-amp/comparator + reference solution, reducing BOM count and PCB area by >40%. |
| Oscillator Circuit | Battery-Powered System |
Use Scenario: Building relaxation oscillator for LED blink timing or clock generation in ultra-low-power microcontroller peripherals. IC Role / Device Role / Timing Role: Comparator with hysteresis forms Schmitt trigger; RC network sets oscillation frequency; REF provides stable trip point. Use Value: 12μs propagation delay and sub-μA quiescent current enable stable kHz-range oscillation consuming <10μA average current. | Use Scenario: Power sequencing and supervision in portable medical devices or IoT edge nodes powered by single-cell Li-ion. IC Role / Device Role / Timing Role: Monitors VBAT and system rails; generates reset or interrupt signals when thresholds are crossed; HYST prevents chatter near trip points. Use Value: Integrated reference and hysteresis eliminate three external components; SOIC-8 package fits tight layout constraints typical of handheld form factors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual micropower comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX933ESA+ | Pin-compatible, same electrical specs and HYST functionality; manufactured by Maxim Integrated (now Analog Devices); identical 1.182V reference and 6μA max supply current. | No functional difference; validated drop-in replacement per Silicon Labs' own documentation as "alternate source". | Select MAX933ESA+ when dual-sourcing is required or when legacy Maxim-designated BOMs must be maintained. |
| TLV3702IDR | Lower supply current (1.8μA typ), no internal reference, no HYST pin; requires external reference and hysteresis resistors; rail-to-rail inputs but open-drain outputs. | Suitable only where external reference is acceptable and board space permits added passives; not drop-in due to missing REF/HYST pins and open-drain outputs. | Choose TLV3702IDR only if ultra-low current (<2μA) dominates over component count and layout simplicity. |
Compared with TSM933CSA+T, MAX933ESA+ offers identical functionality and pinout for seamless second-source assurance, while TLV3702IDR trades integration for lower quiescent current but increases design complexity and component count.
Availability
TSM933CSA+T is available at Aetrix Electronics and suitable for battery-powered systems, industrial sensor interfaces, and portable power management requiring stable component supply, long-term lifecycle support, and RoHS-compliant lead-free packaging.
Supply support for TSM933CSA+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 precision analog, timing, and low-power MCU solutions for IoT, industrial, and consumer applications.
The TSM93x family was designed specifically for ultra-low-power threshold detection and window monitoring in space- and energy-constrained systems, emphasizing micropower operation, integrated reference accuracy, and robust hysteresis control.
FAQ
What is the maximum operating supply voltage for TSM933CSA+T?
The TSM933CSA+T supports a maximum single-supply voltage of +11V or dual-supply rails of ±5.5V. Absolute maximum ratings specify V+ to V− must not exceed 12V, and input pins tolerate up to V+ + 0.3V or V− − 0.3V. Exceeding these limits risks permanent damage. For reliable operation, keep total supply differential ≤11V and ensure input signals remain within specified common-mode range (V− to V+ − 1.3V). The TSM933CSA+T maintains full functionality across this range while drawing ≤6μA.
Does TSM933CSA+T require external hysteresis components?
No - the TSM933CSA+T includes a dedicated HYST pin that accepts a voltage from REF − 50mV to REF, enabling precise hysteresis programming without external feedback resistors across the outputs. When HYST is tied to REF, hysteresis is disabled. For custom hysteresis bands, two external resistors (R1 between REF and HYST, R2 between HYST and V−) configure the band width per documented equations. This integrated approach eliminates crowbar current and simplifies layout versus traditional positive-feedback methods. The TSM933CSA+T datasheet provides design examples for 100mV hysteresis.
What is the function of the REF pin on TSM933CSA+T?
REF is the output of an internal 1.182V ±2% precision voltage reference, referenced to V−. It sources up to 25μA and sinks up to 15μA at +25°C, with reduced capability over temperature. This reference serves as the trip-point anchor for both comparators and the HYST pin, eliminating need for external reference ICs. REF must not be bypassed; capacitive loading degrades noise performance and stability. In window detector applications, REF feeds resistor dividers to set upper/lower thresholds. The TSM933CSA+T guarantees REF accuracy and low noise (100μVRMS) across −40°C to +85°C.
Can TSM933CSA+T operate from a 3V single supply?
Yes - the TSM933CSA+T is fully specified for 3V single-supply operation. At V+ = 3V, V− = GND, it draws ≤5.8μA max over −40°C to +85°C, maintains 14μs propagation delay at 10mV overdrive, and retains full input common-mode range (0V to 1.7V). Output high voltage remains ≥2.6V at 10mA load, and output low voltage stays ≤0.4V. The internal 1.182V reference remains accurate and stable, enabling reliable threshold detection in 3V microcontroller systems. All electrical characteristics in the datasheet include explicit 3V test conditions.
What package type is used for TSM933CSA+T?
TSM933CSA+T uses an 8-pin SOIC (Small Outline Integrated Circuit) package, JEDEC MS-012 compliant, with 3.9mm × 4.9mm body size, 1.27mm lead pitch, and gull-wing leads. This surface-mount package is RoHS-compliant and lead-free, optimized for automated assembly. Pin 1 is marked with a notch or dot; pin numbering follows standard SOIC convention (counterclockwise from top-left). The SOIC package provides thermal performance up to 471mW at +70°C ambient and is compatible with standard reflow profiles. TSM933CSA+T is supplied in tape-and-reel format (2500 units/reel) for SMT production.
TSM933CSA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Silicon Labs
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- TSM93x
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- with Voltage Reference
- Number of Elements:
- 2
- Output Type:
- CMOS, Push-Pull, TTL
- Voltage - Supply, Single/Dual (±):
- 2.5V ~ 11V, ±1.25V ~ 5.5V
- :
- 10mV @ 2.5V
- Voltage - Input Offset (Max):
- -
- Current - Input Bias (Max):
- 40mA
- Current - Output (Typ):
- 4.5µA
- Current - Quiescent (Max):
- 80dB CMRR, 80dB PSRR
- CMRR, PSRR (Typ):
- 12µs
- Propagation Delay (Max):
- 50mV
- Hysteresis:
- 0°C ~ 70°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
TSM933CSA+T FAQ
1.How can I place an order for TSM933CSA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for TSM933CSA+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 TSM933CSA+T reliable?
The price and inventory of TSM933CSA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSM933CSA+T is usually 5 days.
3.What payment methods are accepted for TSM933CSA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSM933CSA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TSM933CSA+T?
TSM933CSA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TSM933CSA+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 TSM933CSA+T?
For technical support, including TSM933CSA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSM933CSA+T requirements.
6.How does Aetrix verify that TSM933CSA+T is sourced from the original manufacturer or authorized distributors?
All TSM933CSA+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 TSM933CSA+T meets industry standards.
7.What is the process for return or replacement of TSM933CSA+T?
All TSM933CSA+T units undergo pre-shipment inspection (PSI). If there is an issue with TSM933CSA+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 TSM933CSA+T part is unused and in its original packaging.
Return procedure for TSM933CSA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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