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Silicon Labs TSM922CSA+T
- Part No.:
- TSM922CSA+T
- Manufacturer:
- Silicon Labs
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TSM922CSA+T.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,849
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Product details
Overview
TSM922CSA+T from Silicon Laboratories is a dual micropower analog comparator with ultra-low 4μA max supply current over temperature, push-pull TTL/CMOS-compatible outputs, and operation from single +2.5V to +11V or dual ±1.25V to ±5.5V supplies. It features rail-to-rail input voltage range (V− to V+ − 1.3V), 12μs propagation delay at 10mV overdrive, and no internal reference - used in battery-powered threshold detection and window comparator circuits.
For engineers reviewing the TSM922CSA+T datasheet, TSM922CSA+T pinout, TSM922CSA+T application, or TSM922CSA+T equivalent, this page delivers verified electrical parameters, package mapping, functional role in low-power sensing systems, and validated alternative options for dual-comparator designs requiring sub-4μA quiescent current and dual-supply flexibility.
Technical Context
The TSM922CSA+T implements two independent comparators sharing common power rails, each with input stages optimized for operation down to 2.5V single supply or ±1.25V dual supply. Its input common-mode range extends from V− to V+ − 1.3V, enabling direct interface with sensors referenced to negative rails or ground.
Output stages are push-pull, capable of sourcing/sinking ≥10mA while maintaining crowbar-current-free switching and TTL/CMOS logic compatibility. Unlike TSM921/TSM923, it lacks an internal reference and HYST pin - eliminating on-chip hysteresis control but reducing component count where external reference or fixed thresholds apply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +11V (single) or ±1.25V to ±5.5V (dual) - supports both 3V/5V embedded systems and bipolar signal conditioning |
| Max Supply Current | 4μA over −40°C to +85°C - enables multi-year battery life in always-on monitoring nodes |
| Propagation Delay | 12μs at 10mV overdrive - sufficient for slow-varying DC thresholds (e.g., battery voltage monitoring) |
| Input Common-Mode Range | V− to V+ − 1.3V - allows direct sensing of signals near negative rail without level-shifting circuitry |
| Output Drive | Sinks/sources ≥10mA (TTL/CMOS compatible) - directly drives LEDs, logic inputs, or small MOSFET gates without buffer stages |
| Input Offset Voltage | ±10mV - sets minimum detectable differential voltage in precision threshold applications |
| Input Leakage Current | ±0.01nA to ±5nA - preserves accuracy in high-impedance sensor interfaces (e.g., thermistors, photodiodes) |
Pinout & Package
Package: 8-pin SOIC (Small Outline Integrated Circuit), 3.9mm × 4.9mm body, JEDEC MS-012 compliant, RoHS-compliant lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Ground reference | Connect to V− for single-supply operation; output swings from V+ to GND |
| 2 OUTA | Comparator A output | Push-pull stage sinks/sources current; TTL/CMOS-compatible; no external pull-up required |
| 3 V− | Negative supply | Set to GND for single supply; set to negative voltage for dual-supply operation |
| 4 INA− | Comparator A inverting input | Accepts signals from V− to V+ − 1.3V; ≤5nA leakage preserves high-Z node integrity |
| 5 INA+ | Comparator A noninverting input | Same voltage range and leakage as INA−; differential pair defines trip point |
| 6 INB− | Comparator B inverting input | Independent input channel; identical specs to INA−; enables dual-threshold or window detection |
| 7 INB+ | Comparator B noninverting input | Independent input channel; identical specs to INA+; supports separate reference or sensor paths |
| 8 V+ | Positive supply | Accepts +2.5V to +11V; powers both comparators and output stages |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 4μA max over full −40°C to +85°C range - eliminates thermal drift concerns in sealed battery enclosures |
| Rail-to-rail input capability | V− to V+ − 1.3V input range - enables direct connection to transducers operating near supply rails |
| Crowbar-current-free switching | No shoot-through current during output transitions - prevents supply glitches in noise-sensitive mixed-signal systems |
| Push-pull output architecture | Active drive high/low without external resistors - reduces BOM count and PCB area in space-constrained modules |
| Dual-supply operational flexibility | ±1.25V to ±5.5V support - accommodates legacy industrial analog front-ends using bipolar op-amp rails |
Applications
| Threshold Detector | Window Comparator |
|---|---|
Use Scenario: Monitoring battery voltage to trigger low-battery warning before system shutdown. IC Role / Device Role / Timing Role: Dual comparator compares sensed voltage against upper and lower thresholds generated by resistor dividers. Use Value: Eliminates need for microcontroller ADC polling; achieves <4μA total system standby current with discrete threshold logic. | Use Scenario: Validating that a 5V power rail remains within 4.5V–5.5V tolerance band. IC Role / Device Role / Timing Role: One comparator detects undervoltage (OUTA active-low), the other detects overvoltage (OUTB active-low). Use Value: Generates independent fault flags with no shared reference - avoids single-point failure in safety-critical power supervision. |
| Level Translator | Oscillator Circuit |
Use Scenario: Converting ±5V analog sensor output to 0–5V TTL logic for MCU input. IC Role / Device Role / Timing Role: Comparator acts as zero-crossing detector with hysteresis to reject noise on bipolar input. Use Value: Replaces discrete transistor level shifters; maintains timing integrity with 12μs delay and no duty-cycle distortion. | Use Scenario: Building relaxation oscillator for LED blink timing or clock generation in ultra-low-power nodes. IC Role / Device Role / Timing Role: Comparator charges/discharges capacitor via feedback network to generate square wave. Use Value: Achieves stable oscillation at ~1Hz with <4μA supply - outperforms RC timers with higher temperature stability and lower drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX922ESA+ | Pin-compatible dual comparator; same 4μA max supply current, 12μs delay, and SOIC-8 package; identical input range and output drive. | No internal reference or HYST pin - matches TSM922CSA+T's feature set exactly; drop-in replacement for legacy MAX922 designs. | Select when migrating from Maxim parts or requiring second-source availability with identical electrical behavior. |
| LM393DR | Higher 100μA supply current; open-collector outputs require pull-up resistors; wider offset (±2mV to ±25mV); no dual-supply rail-to-rail input. | Not suitable for sub-5μA battery systems; requires external components for logic-level compatibility; limited to single-supply use below 36V. | Choose only for cost-sensitive, non-battery applications where 100μA quiescent current is acceptable and open-collector flexibility is needed. |
Compared with MAX922ESA+, TSM922CSA+T offers identical performance and footprint but with Silicon Labs' extended lifecycle support and RoHS-compliant lead-free packaging; versus LM393DR, it delivers 25× lower supply current, push-pull outputs, and true dual-supply operation - making it essential for energy-harvesting and long-life portable instrumentation.
Availability
TSM922CSA+T is available at Aetrix Electronics and suitable for battery-powered systems, industrial sensor interfaces, and portable medical devices requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for TSM922CSA+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 Laboratories is a fabless semiconductor company specializing in low-power, mixed-signal ICs for timing, IoT, and embedded control applications.
The TSM922CSA+T belongs to the TSM921–TSM924 micropower comparator family, designed specifically for ultra-low-quiescent-current sensing in battery-operated and energy-constrained systems where supply current below 5μA is mandatory.
FAQ
What is the maximum supply voltage rating for TSM922CSA+T?
The absolute maximum supply voltage for TSM922CSA+T is +12V between V+ and V−, or +12V between V+ and GND in single-supply mode. Operation beyond this risks permanent damage. The recommended operating range remains +2.5V to +11V for reliable performance across temperature. Always observe derating curves in the datasheet when operating near limits.
Does TSM922CSA+T include an internal voltage reference?
No, TSM922CSA+T does not include an internal voltage reference. Unlike TSM921, TSM923, and TSM924, the TSM922 variant omits the 1.182V ±1% REF pin and associated reference circuitry. External references or resistor-divider thresholds must be used for precise comparison points in TSM922CSA+T designs.
Can TSM922CSA+T operate from dual ±3V supplies?
Yes, TSM922CSA+T supports dual-supply operation from ±1.25V to ±5.5V, including ±3V. In this configuration, V+ = +3V and V− = −3V, giving a total supply span of 6V. The input common-mode range extends from −3V to +1.7V (V+ − 1.3V), and outputs swing fully from −3V to +3V - enabling direct interfacing with bipolar analog signals.
What is the output type of TSM922CSA+T and how does it differ from open-collector comparators?
TSM922CSA+T features push-pull (totem-pole) outputs, meaning each output actively drives high or low without requiring external pull-up resistors. This contrasts with open-collector comparators like LM393, which only sink current and need external pull-ups. Push-pull operation reduces component count, improves rise/fall times, and ensures defined logic levels under all load conditions - critical for driving CMOS inputs directly.
Is TSM922CSA+T pin-compatible with the MAX922 series?
Yes, TSM922CSA+T is electrically and form-factor identical to the MAX922 family, including pinout, package (SOIC-8), supply ranges, propagation delay, and output drive. Silicon Labs explicitly states this compatibility in the datasheet. Designers can substitute TSM922CSA+T for MAX922 in existing layouts without modifications - preserving board design integrity while gaining access to Silicon Labs' long-term supply assurance.
TSM922CSA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Silicon Labs
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- TSM92x
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- General Purpose
- 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):
- 3.2µA
- Current - Quiescent (Max):
- 80dB CMRR, 80dB PSRR
- CMRR, PSRR (Typ):
- 12µs
- Propagation Delay (Max):
- -
- Hysteresis:
- 0°C ~ 70°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
TSM922CSA+T FAQ
1.How can I place an order for TSM922CSA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for TSM922CSA+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 TSM922CSA+T reliable?
The price and inventory of TSM922CSA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSM922CSA+T is usually 5 days.
3.What payment methods are accepted for TSM922CSA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSM922CSA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TSM922CSA+T?
TSM922CSA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TSM922CSA+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 TSM922CSA+T?
For technical support, including TSM922CSA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSM922CSA+T requirements.
6.How does Aetrix verify that TSM922CSA+T is sourced from the original manufacturer or authorized distributors?
All TSM922CSA+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 TSM922CSA+T meets industry standards.
7.What is the process for return or replacement of TSM922CSA+T?
All TSM922CSA+T units undergo pre-shipment inspection (PSI). If there is an issue with TSM922CSA+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 TSM922CSA+T part is unused and in its original packaging.
Return procedure for TSM922CSA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TSM922CSA+T Tags
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