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Silicon Labs TSM934CSE+
- Part No.:
- TSM934CSE+
- Manufacturer:
- Silicon Labs
- Category:
- Comparators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TSM934CSE+.pdf
- Description:
- IC COMPARATR 4 W/VOLT REF 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,875
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Product details
Overview
TSM934CSE+ from Silicon Labs is a quad micropower analog comparator with integrated 1.182V ±2% reference, ultra-low quiescent current (8.5μA max over temperature), push-pull TTL/CMOS-compatible outputs, and single/dual-supply operation from +2.5V to +11V or ±1.25V to ±5.5V. It serves as a drop-in replacement for MAX934 in battery-powered threshold detection and window comparator circuits.
For engineers reviewing the TSM934CSE+ datasheet, TSM934CSE+ pinout, TSM934CSE+ application, or TSM934CSE+ equivalent, key selection criteria include its 12μs propagation delay at 10mV overdrive, GND-referenced output swing (V+ to GND), internal reference accuracy, 16-pin SOIC package, and absence of HYST pin (unlike TSM931–TSM933).
Technical Context
The TSM934CSE+ integrates four independent comparators sharing a common internal 1.182V reference and operates across an input common-mode range from V− to V+ − 1.3V. Its push-pull output stage sources/sinks up to 40mA continuously while maintaining sub-9μA supply current over 0°C to +70°C.
Unlike TSM931–TSM933, the TSM934CSE+ lacks a dedicated HYST pin; hysteresis must be implemented externally via positive feedback networks on each comparator input pair. It supports low-voltage operation down to 1.5V supply (with degraded reference functionality below 2.2V) and features crowbar-current-free switching to eliminate output glitches during transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current (max) | 8.5μA over 0°C to +70°C - enables multi-year battery life in always-on sensing nodes |
| Propagation Delay | 12μs at 10mV overdrive - suitable for medium-speed level detection without timing-critical constraints |
| Reference Voltage | 1.182V ±2% (0°C to +70°C) - provides stable trip-point generation without external voltage source |
| Output Drive | Sources/sinks 40mA continuously - directly drives LEDs, logic inputs, or small MOSFET gates without buffer stages |
| Input Common-Mode Range | V− to V+ − 1.3V - supports rail-to-rail input sensing in single-supply systems |
| Supply Range | +2.5V to +11V (single) or ±1.25V to ±5.5V (dual) - compatible with 3V/5V logic rails and legacy bipolar supplies |
| Operating Temperature | 0°C to +70°C - qualified for commercial-grade embedded control and instrumentation |
Pinout & Package
Package: 16-pin SOIC (width 7.5mm), JEDEC MS-012 compliant, lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTB | Comparator B output - push-pull, swings V+ to GND; sinks/sources 40mA |
| 2 | OUTA | Comparator A output - identical drive capability and voltage swing as OUTB |
| 3 | V+ | Positive supply rail - accepts +2.5V to +11V or connects to +5V in dual-supply mode |
| 4 | INA− | Comparator A inverting input - supports common-mode range down to V− |
| 5 | INA+ | Comparator A noninverting input - differential pair input with ±10mV offset max |
| 6 | INB− | Comparator B inverting input - electrically isolated from other comparator inputs |
| 7 | INB+ | Comparator B noninverting input - matched offset and leakage specs to INA± |
| 8 | REF | 1.182V reference output - referenced to V−; sources/sinks up to 25μA/15μA |
| 9 | V− | Negative supply - tied to GND for single-supply use; sets reference and output swing baseline |
| 10 | INC− | Comparator C inverting input - fully independent, same electrical specs as INA−/INB− |
| 11 | INC+ | Comparator C noninverting input - supports same input voltage range and leakage limits |
| 12 | IND− | Comparator D inverting input - no shared internal nodes with other comparators |
| 13 | IND+ | Comparator D noninverting input - maintains ±10mV offset and <1nA leakage over temp |
| 14 | GND | Ground reference - connected to V− in single-supply config; defines output low-level (0.4V max @ 1.8mA) |
| 15 | OUTD | Comparator D output - identical push-pull structure and drive strength as OUTA/OUTB |
| 16 | OUTC | Comparator C output - fully buffered, no crosstalk to other outputs under load |
Key Features
| Feature | Design Value |
|---|---|
| Quad comparator + reference in one SOIC-16 | Reduces board space and BOM count vs discrete solutions; eliminates need for external reference IC |
| Crowbar-current-free output switching | Prevents shoot-through current spikes during output transitions - improves EMI and power integrity |
| No HYST pin (TSM934-specific) | Enables full flexibility in hysteresis design per comparator channel using external resistive feedback |
| 1.182V ±2% internal reference | Stable trip point across 0°C to +70°C without trimming or calibration - simplifies precision threshold design |
| Single-supply operation from 2.5V | Supports modern low-voltage microcontrollers and sensors without level-shifting circuitry |
Applications
| Threshold Detector | Window Comparator |
|---|---|
Use Scenario: Monitoring battery voltage to trigger low-battery warning at 3.3V and shutdown at 2.8V. IC Role / Device Role / Timing Role: TSM934CSE+ uses two comparators (A/B) with resistor dividers to generate independent high/low thresholds against internal 1.182V reference. Use Value: Eliminates external reference and reduces component count by 3–4 parts versus discrete op-amp + reference solution. | Use Scenario: Validating 5V supply rail stays within 4.75V–5.25V tolerance band in industrial controller. IC Role / Device Role / Timing Role: TSM934CSE+ channels A and B compare upper/lower bounds; outputs ANDed to generate "power-good" signal. Use Value: Achieves <12μs response to over/undervoltage events - faster than typical supervisor ICs with built-in hysteresis. |
| Bar-Graph Level Gauge | Level Translator |
Use Scenario: Driving four LEDs to indicate analog sensor output (e.g., light intensity or temperature) in 25% increments. IC Role / Device Role / Timing Role: TSM934CSE+ channels A–D compare scaled input against fixed reference ladder; each output directly sources LED current. Use Value: 40mA per output drives standard LEDs without series transistors - cuts PCB area and cost vs buffered designs. | Use Scenario: Converting ±5V analog signals from legacy test equipment to 0–5V TTL logic levels for MCU ADC input. IC Role / Device Role / Timing Role: TSM934CSE+ acts as rail-to-rail input translator; IN+ referenced to REF, IN− tied to input; output swings 0–5V. Use Value: Input protection resistors (10kΩ) prevent damage from ±5V transients while preserving <14μs response time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad comparator with reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX934CSA+ | Pin-compatible, identical pinout and electrical specs; same 1.182V reference, 8.5μA max supply current, and SOIC-16 package. | No functional difference - direct second-source part with identical performance and layout compatibility. | Select MAX934CSA+ when dual-sourcing is required for supply chain resilience without redesign. |
| LM339DR | Quad comparator only - no internal reference; requires external 1.182V or adjustable reference; higher 2mA supply current; open-collector outputs require pull-ups. | Not suitable for space-constrained or ultra-low-power applications; adds 2–3 passive components and increases quiescent draw 235×. | Choose LM339DR only if reference flexibility or cost sensitivity outweighs power and integration benefits of TSM934CSE+. |
Compared with MAX934CSA+, TSM934CSE+ offers identical functionality and drop-in compatibility; compared with LM339DR, it delivers 235× lower supply current, integrated reference, push-pull outputs eliminating pull-up resistors, and guaranteed 12μs propagation delay - making it optimal for battery-powered and compact designs.
Availability
TSM934CSE+ is available at Aetrix Electronics and suitable for battery-powered systems, portable instrumentation, and industrial monitoring requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for TSM934CSE+ 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 mixed-signal ICs for embedded systems, IoT, and industrial applications.
The TSM93x family was designed specifically for ultra-low-power, high-integration analog threshold detection in space- and energy-constrained devices - emphasizing micropower operation, internal reference stability, and robust output drive without external buffers.
FAQ
What is the maximum supply voltage for TSM934CSE+?
The absolute maximum supply voltage for TSM934CSE+ is +12V between V+ and V−. The recommended operating range is +2.5V to +11V for single-supply use or ±1.25V to ±5.5V for dual-supply configurations. Exceeding +12V risks permanent damage per Absolute Maximum Ratings on page 2 of the datasheet. TSM934CSE+ maintains full functionality across its specified range, including reference accuracy and 12μs propagation delay at 10mV overdrive.
Does TSM934CSE+ include hysteresis capability?
TSM934CSE+ does not feature a dedicated HYST pin like TSM931–TSM933. Hysteresis must be implemented externally using positive feedback resistors on each comparator input pair. The datasheet provides detailed design equations and examples (pages 13–14) for setting precise hysteresis bands (e.g., 50mV) using standard 1% resistors. This architecture gives full per-channel control but requires two additional resistors per comparator versus the integrated HYST option.
Can TSM934CSE+ operate from a 1.8V supply?
TSM934CSE+ can function down to 1.5V supply, but with trade-offs: the internal 1.182V reference ceases operation below 2.2V, and propagation delay increases significantly. At 1.8V, comparators remain active with valid output swing (V+ to GND), but reference-dependent functions (e.g., fixed-threshold detection) require an external reference. Performance validation across voltage and temperature is essential - see "Low-Voltage Operation" section on page 12 of the datasheet for characterization data.
What is the output voltage swing of TSM934CSE+?
TSM934CSE+ features push-pull TTL/CMOS-compatible outputs that swing from V+ to GND. With V+ = 5V and IOUT = 1.8mA, VOL ≤ 0.4V and VOH ≥ V+ − 0.4V = 4.6V (page 5). This rail-to-rail output capability eliminates need for pull-up resistors and allows direct interfacing with 3.3V/5V logic families. Output drive strength remains stable across 0°C to +70°C, supporting continuous 40mA sourcing/sinking per channel.
Is TSM934CSE+ pin-compatible with MAX934?
Yes, TSM934CSE+ is electrically and form-factor identical to MAX934, as confirmed on page 1 ("electrically and form-factor identical to the MAX931–MAX934 family"). Both use 16-pin SOIC packages with identical pin assignments (page 10), supply ranges, reference specs, and output characteristics. No PCB changes are required when substituting TSM934CSE+ for MAX934CSA+ in existing designs - making it a true drop-in alternate source.
TSM934CSE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Silicon Labs
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Series:
- TSM93x
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- with Voltage Reference
- Number of Elements:
- 4
- 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):
- 6.5µA
- 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
- :
- 16-SOIC
TSM934CSE+ FAQ
1.How can I place an order for TSM934CSE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for TSM934CSE+ 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 TSM934CSE+ reliable?
The price and inventory of TSM934CSE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSM934CSE+ is usually 5 days.
3.What payment methods are accepted for TSM934CSE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSM934CSE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TSM934CSE+?
TSM934CSE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TSM934CSE+ 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 TSM934CSE+?
For technical support, including TSM934CSE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSM934CSE+ requirements.
6.How does Aetrix verify that TSM934CSE+ is sourced from the original manufacturer or authorized distributors?
All TSM934CSE+ 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 TSM934CSE+ meets industry standards.
7.What is the process for return or replacement of TSM934CSE+?
All TSM934CSE+ units undergo pre-shipment inspection (PSI). If there is an issue with TSM934CSE+, 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 TSM934CSE+ part is unused and in its original packaging.
Return procedure for TSM934CSE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TSM934CSE+ Tags
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LM2903DR
Texas Instruments
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LM339DR
Texas Instruments
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LM339PWR
Texas Instruments
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LM393DT
STMicroelectronics
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LM2901PWR
Texas Instruments
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LM2903DT
STMicroelectronics
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LM393DR
Texas Instruments
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LM239DR
Texas Instruments
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LM339APWR
Texas Instruments
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LM2903P
Texas Instruments
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LM393ADR
Texas Instruments
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NCX2200GMAZ
NXP Semiconductors
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