My Inquiry
My Account
Silicon Labs TSM933CUA+
- Part No.:
- TSM933CUA+
- Manufacturer:
- Silicon Labs
- Category:
- Comparators
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TSM933CUA+.pdf
- Description:
- IC COMPARATOR 2 W/VOLT REF 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,059
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TSM933CUA+ 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 TSM933CUA+ datasheet, TSM933CUA+ pinout, TSM933CUA+ application, or TSM933CUA+ equivalent, key selection criteria include its dual-comparator architecture with internal reference, hysteresis control via dedicated HYST pin, rail-to-rail input range (V− to V+ −1.3V), and MSOP-8 package compatibility with SOIC-8 footprints.
Technical Context
The TSM933CUA+ integrates two independent comparators sharing a common 1.182V reference and hysteresis control path. Its input stage supports common-mode voltages from V− to V+ −1.3V, enabling direct sensing near ground in single-supply systems. The push-pull output stage eliminates crowbar current during switching and sustains continuous 40mA source capability without increasing quiescent current.
Hysteresis is implemented externally via the HYST pin using two resistors between REF and V−, generating a programmable band up to 100mV. Input offset voltage is ±10mV max, and voltage noise is 20μVRMS (100Hz–100kHz), supporting stable operation in noisy, low-power sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +11V (single); ±1.25V to ±5.5V (dual) - enables direct use in 3V/5V battery or industrial rails without level-shifting. |
| Max Supply Current | 6μA over −40°C to +85°C - ensures multi-year operation on coin cells in always-on monitoring circuits. |
| Propagation Delay | 12μs at 10mV overdrive - provides deterministic timing for fast threshold detection in power sequencing. |
| Input Offset Voltage | ±10mV max - sets minimum detectable differential voltage without calibration in precision level sensing. |
| Reference Accuracy | 1.182V ±2% (0°C to +70°C) - allows accurate, self-contained trip-point generation without external voltage references. |
| Output Drive | 40mA continuous source / 5mA sink - directly drives LEDs, MOSFET gates, or logic inputs without buffer stages. |
| Input Common-Mode Range | V− to V+ −1.3V - supports sensing signals down to ground in single-supply configurations. |
Pinout & Package
Package: 8-pin MSOP (TSM933CUA+) - 3.0mm × 3.0mm body, 0.65mm pitch, JEDEC MO-187 compatible; pin-compatible with SOIC-8 but with reduced footprint and thermal resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for single-supply operation; connects to V− to define output swing range (V+ to GND). |
| 2 | OUTA | Comparator A push-pull output; sinks and sources current to drive TTL/CMOS loads directly. |
| 3 | V− | Negative supply terminal; tied to GND in single-supply mode; enables dual-supply operation when biased below GND. |
| 4 | INB+ | Comparator B noninverting input; accepts signals from V− to V+ −1.3V for rail-to-rail sensing. |
| 5 | HYST | Hysteresis control input; voltage between REF and REF−50mV sets hysteresis band up to 100mV. |
| 6 | REF | 1.182V ±2% reference output referenced to V−; sources up to 25μA, sinks up to 15μA. |
| 7 | V+ | Positive supply input; supports wide voltage range (+2.5V to +11V) for flexible system integration. |
| 8 | OUTB | Comparator B push-pull output; electrically identical to OUTA with independent input control. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | ≤6μA max over −40°C to +85°C - extends battery life in portable medical and IoT sensors. |
| Dedicated hysteresis pin | HYST pin accepts REF−50mV to REF, enabling precise 0–100mV hysteresis without external op-amps or feedback loops. |
| Integrated precision reference | 1.182V ±2% over 0°C to +70°C - eliminates need for external reference ICs in dual-threshold designs like window detectors. |
| Crowbar-current-free switching | Push-pull output architecture prevents shoot-through current during state transitions - improves reliability in high-reliability power monitoring. |
| Rail-to-rail input range | V− to V+ −1.3V - allows direct interface to ground-referenced sensors and ADCs without biasing networks. |
Applications
| Threshold Detector | Window Comparator |
|---|---|
Use Scenario: Monitoring battery voltage to trigger low-battery warning at 3.2V and disable system at 2.8V. IC Role / Device Role / Timing Role: Dual comparator configures one channel as undervoltage detector (INB− = 3.2V ref), second as fail-safe cutoff (INA− = 2.8V ref), both using shared REF and HYST. Use Value: Eliminates external reference and reduces BOM count by 3 components versus discrete solutions while maintaining ±10mV trip accuracy. | Use Scenario: Validating 5V supply integrity in embedded controllers with 4.5V–5.5V acceptable range. IC Role / Device Role / Timing Role: TSM933CUA+ implements dual-threshold detection: OUTA asserts low below 4.5V, OUTB asserts low above 5.5V; AND-gated output yields clean power-good signal. Use Value: Internal 1.182V reference and HYST pin enable <100mV hysteresis per threshold without resistor divider errors or layout sensitivity. |
| Oscillator Circuit | Battery-Powered System |
Use Scenario: Building relaxation oscillator for LED blink timing using hysteresis feedback and RC network. IC Role / Device Role / Timing Role: Comparator A forms hysteresis loop with REF and HYST pins; capacitor charges/discharges between trip points set by R1/R2 network. Use Value: 12μs propagation delay and 40mA drive ensure stable oscillation frequency stability across 2.5–11V supply range with no external buffers needed. | Use Scenario: Enabling ultra-low-power wake-up in wireless sensor nodes triggered by analog event (e.g., motion, light). IC Role / Device Role / Timing Role: TSM933CUA+ monitors sensor output against reference; one comparator wakes MCU via interrupt, second validates signal persistence via hysteresis. Use Value: 6μA total supply current allows continuous monitoring for months on CR2032, with sub-10μs response ensuring no event loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator with reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX933ESA+ | Pin- and function-compatible; identical electrical specs; same 8-pin SOIC/MSOP footprint and HYST/REF architecture. | No functional difference; validated drop-in replacement per Silicon Labs' alternate-source documentation. | Select MAX933ESA+ only if legacy MAX-designated BOMs require exact part-number continuity. |
| TLV3702IDR | No integrated reference; requires external 1.2V reference; higher 17μA supply current; 360μs propagation delay. | Suitable for cost-sensitive designs where reference is already present; not viable for space-constrained or ultra-low-power applications. | Choose TLV3702IDR only when reference sharing across multiple ICs justifies added complexity and current penalty. |
Compared with MAX933ESA+, TSM933CUA+ offers identical performance and drop-in compatibility, while TLV3702IDR trades integrated reference and micropower operation for lower unit cost - making TSM933CUA+ optimal for new designs prioritizing BOM reduction and battery life.
Availability
TSM933CUA+ is available at Aetrix Electronics and suitable for battery-powered systems, industrial sensor interfaces, and embedded power monitoring requiring stable component supply, long-term lifecycle support, and guaranteed lead-free packaging.
Supply support for TSM933CUA+ 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 connectivity ICs for IoT, industrial, and consumer applications.
The TSM93x family was designed specifically for micropower analog sensing and threshold detection in resource-constrained systems, emphasizing ultra-low supply current, integrated reference, and robust hysteresis control - distinguishing it from general-purpose comparators.
FAQ
What is the maximum operating supply voltage for TSM933CUA+?
The TSM933CUA+ supports a maximum single-supply voltage of +11V and a maximum dual-supply voltage of ±5.5V. Absolute maximum ratings specify V+ to V− must not exceed 12V. Exceeding these limits risks permanent damage. Operation at 11V is fully characterized per datasheet specifications, including supply current, propagation delay, and output drive capability - all confirmed for TSM933CUA+ across temperature.
Does TSM933CUA+ support true rail-to-rail input operation?
TSM933CUA+ supports input common-mode voltage from V− to V+ −1.3V - meaning it operates down to the negative rail but does not reach the positive rail. This allows ground-sensing in single-supply systems but requires ≥1.3V headroom from V+. The specification is verified across −40°C to +85°C and applies to both INB+ and INB− pins. No external biasing is needed for V−-referenced signals.
Can the internal reference of TSM933CUA+ be used to bias external circuitry?
Yes, the REF pin of TSM933CUA+ can source up to 25μA and sink up to 15μA while maintaining ±2% accuracy over 0°C to +70°C. It is explicitly designed to drive external resistor networks for hysteresis or threshold setting. Datasheet Figure 2 confirms REF-driven hysteresis design; bypassing REF is not recommended, and loading beyond 25μA degrades reference accuracy and stability.
How is hysteresis configured on TSM933CUA+?
Hysteresis on TSM933CUA+ is configured using the HYST pin with two external resistors: R1 between REF and HYST, and R2 between HYST and V−. The hysteresis band equals twice the voltage difference between REF and HYST, up to 100mV. This method is documented in datasheet Page 13 and requires no additional ICs. The HYST pin voltage must stay within REF −50mV to REF to avoid invalid operation.
Is TSM933CUA+ pin-compatible with SOIC-8 packages?
Yes, TSM933CUA+ uses an 8-pin MSOP package with 0.65mm pitch and 3.0mm × 3.0mm body, which shares identical pin numbering and function mapping with SOIC-8 variants (e.g., TSM933CSA+). Mechanical drawings confirm full PCB footprint compatibility, though MSOP requires adjusted stencil aperture and reflow profile due to smaller pad size and thermal mass.
TSM933CUA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Silicon Labs
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Series:
- TSM93x
- Packaging:
- Tube
- 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-MSOP
TSM933CUA+ FAQ
1.How can I place an order for TSM933CUA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for TSM933CUA+ 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 TSM933CUA+ reliable?
The price and inventory of TSM933CUA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSM933CUA+ is usually 5 days.
3.What payment methods are accepted for TSM933CUA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSM933CUA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TSM933CUA+?
TSM933CUA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TSM933CUA+ 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 TSM933CUA+?
For technical support, including TSM933CUA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSM933CUA+ requirements.
6.How does Aetrix verify that TSM933CUA+ is sourced from the original manufacturer or authorized distributors?
All TSM933CUA+ 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 TSM933CUA+ meets industry standards.
7.What is the process for return or replacement of TSM933CUA+?
All TSM933CUA+ units undergo pre-shipment inspection (PSI). If there is an issue with TSM933CUA+, 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 TSM933CUA+ part is unused and in its original packaging.
Return procedure for TSM933CUA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TSM933CUA+ Tags
-
LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
-
LM339PWR
Texas Instruments
-
LM393DT
STMicroelectronics
-
LM2901PWR
Texas Instruments
-
LM2903DT
STMicroelectronics
-
LM393DR
Texas Instruments
-
LM239DR
Texas Instruments
-
LM339APWR
Texas Instruments
-
LM2903P
Texas Instruments
-
LM393ADR
Texas Instruments
-
NCX2200GMAZ
NXP Semiconductors
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
