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Texas Instruments TLC354CN
- Part No.:
- TLC354CN
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
TLC354CN.pdf
- Description:
- IC COMPARATOR 4 DIFF 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,662
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Product details
Overview
TLC354CN from Texas Instruments is a LinCMOS™ quadruple differential comparator IC designed for single- or dual-supply operation across 1.4 V to 18 V. It delivers ultralow input bias current (5 pA typ), high input impedance (10¹² Ω typ), and open-drain n-channel outputs compatible with TTL/MOS/CMOS logic-enabling wired-AND configurations in battery-powered sensor threshold detection circuits.
For engineers reviewing the TLC354CN datasheet, TLC354CN pinout, TLC354CN application, or TLC354CN equivalent, key selection criteria include its 1.4-V minimum supply voltage, 5-mV max input offset voltage at 25°C, 300 µA typical supply current at 5 V, and PDIP-14 package compatibility with legacy through-hole industrial control boards.
Technical Context
The TLC354CN implements four independent comparators on a single silicon die using LinCMOS™ process technology, enabling direct interface to high-impedance sources without loading. Each channel features rail-to-rail common-mode input range including ground and supports dual-supply operation when VDD–VSS ≥ 1.4 V.
Its open-drain output stage requires external pull-up resistors and permits positive-logic wired-AND logic functions across channels. Input offset voltage drift is specified at ≤0.23 µV/month, and ESD protection meets 2000-V HBM per MIL-STD-833C Method 3015.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.4 V to 18 V - enables operation from single-cell LiFePO₄ (≈1.8 V) or dual AA batteries (≈3 V) up to industrial 15-V rails |
| Input Bias Current | 5 pA typ - preserves signal integrity in high-Z sensor interfaces like photodiode or pH electrode amplifiers |
| Input Offset Voltage | 5 mV max at 25°C - sets minimum detectable differential voltage in precision thresholding applications |
| Supply Current (4 ch) | 300 µA typ at 5 V - supports >1-year battery life in always-on low-power monitoring systems |
| Response Time | 200 ns typ (TTL step) - suitable for medium-speed window comparators in motor overcurrent protection |
| Output Type | Open-drain n-channel - allows flexible logic-level translation and multi-comparator wired-AND summation |
| ESD Rating | 2000 V HBM - provides baseline handling robustness for manual assembly in non-ESD-controlled environments |
Pinout & Package
Package: PDIP-14 (Plastic Dual In-line Package), 14-pin through-hole, 0.3-inch body width, RoHS-compliant NIPDAU lead finish, rated for 0°C to 70°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OUT, 2OUT, 3OUT, 4OUT | Comparator output (n-channel open-drain) | Each requires external pull-up; enables wired-AND logic and level-shifting across voltage domains |
| 1IN+, 1IN–, 2IN+, 2IN–, 3IN+, 3IN–, 4IN+, 4IN– | Differential input pairs (4 channels) | High-impedance inputs accept signals down to ground; no internal hysteresis |
| VDD | Positive supply rail | Accepts 1.4–18 V; powers all four comparators and internal bias circuitry |
| VDD–/GND | Negative supply / ground reference | Serves as return path; common-mode range includes this node, enabling single-supply ground-referenced sensing |
Key Features
| Feature | Design Value |
|---|---|
| LinCMOS™ process technology | Enables 10¹² Ω input impedance and 5 pA input bias current-critical for interfacing with piezoelectric sensors or electrochemical cells |
| Single-supply operation from 1.4 V | Supports direct use with primary lithium or NiMH battery stacks without regulation-reducing BOM count in portable instrumentation |
| Pin-compatible with LM339 | Permits drop-in replacement in existing designs using industry-standard quad comparator footprints and layout |
| Ultrastable input offset voltage | Drift ≤0.23 µV/month ensures long-term calibration stability in unattended environmental monitoring equipment |
| Wide common-mode input range | Includes ground and extends to VDD–1.5 V (at full temp range), simplifying level-shifting in mixed-voltage systems |
Applications
| Industrial Threshold Detection | Battery Monitoring System |
|---|---|
Use Scenario: Detecting overtemperature conditions in motor windings using thermistor voltage dividers. IC Role / Device Role / Timing Role: Quadruple comparator monitors four independent thermal zones; each channel compares thermistor output against fixed reference. Use Value: Open-drain outputs drive shared alarm line via wired-AND, reducing PCB routing complexity and component count. | Use Scenario: Monitoring individual cell voltages in a 4-cell Li-ion pack for under-voltage lockout. IC Role / Device Role / Timing Role: Each comparator checks one cell's voltage against 2.5-V reference; outputs feed OR-gated fault signal. Use Value: 1.4-V minimum supply allows direct operation from lowest cell voltage, eliminating need for auxiliary LDO. |
| Programmable Logic Interface | Legacy Analog Signal Conditioning |
Use Scenario: Converting analog sensor outputs (e.g., pressure transducer) into clean digital enable signals for PLC inputs. IC Role / Device Role / Timing Role: Comparator acts as analog-to-digital threshold translator; hysteresis added externally via feedback. Use Value: TTL/CMOS-compatible outputs interface directly to 5-V PLC digital inputs without level-shifter ICs. | Use Scenario: Retrofitting aging test equipment with modern low-power comparators while retaining original PDIP-14 footprint. IC Role / Device Role / Timing Role: Drop-in replacement for LM339 in legacy schematics; identical pinout and electrical behavior at 5 V. Use Value: Maintains board compatibility while improving input bias current by 3 orders of magnitude (vs. bipolar LM339). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM339N | Bipolar input stage; 250 nA input bias current; 2 mV typical offset; no 1.4-V operation | Higher power consumption (500 µA/ch); unsuitable for sub-2-V battery systems | Select LM339N only when cost is primary constraint and ultra-low input current is unnecessary |
| TLC3702CP | CMOS dual comparator (2 ch); rail-to-rail inputs; 1-pA bias; but requires separate part for 4-channel function | Needs two devices + extra PCB area to match TLC354CN's 4-channel integration | Choose TLC3702CP when rail-to-rail input swing beyond VDD–1.5 V is required and channel count can be split |
Compared with LM339N and TLC3702CP, the TLC354CN uniquely combines 4-channel integration, 1.4-V operation, and picoampere input bias in a PDIP-14 package-making it optimal for space-constrained, battery-critical industrial sensing where legacy footprint retention matters.
Availability
TLC354CN is available at Aetrix Electronics and suitable for industrial threshold detection, battery monitoring systems, programmable logic interfaces, and legacy analog signal conditioning requiring stable component supply and long-lifecycle support.
Supply support for TLC354CN 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies, with decades of expertise in precision analog IC design.
The TLC354CN belongs to TI's LinCMOS™ comparator family, engineered specifically for low-power, high-input-impedance applications in battery-operated and industrial sensing systems where input bias current and supply voltage flexibility are critical.
FAQ
What is the minimum operating supply voltage for the TLC354CN?
The TLC354CN operates down to 1.4 V, verified per datasheet Section "Recommended Operating Conditions". This enables direct use with single primary lithium cells or partially discharged NiMH batteries without regulation. At 1.4 V, supply current drops to 130 µA typ (four comparators), supporting multi-year battery life in always-on monitoring nodes. The TLC354CN maintains functional output drive capability and input common-mode range down to this voltage.
Does the TLC354CN require external hysteresis for stable switching?
No, the TLC354CN does not include internal hysteresis. Its open-loop comparator architecture requires external positive feedback (e.g., resistor from output to noninverting input) to prevent oscillation near threshold. This design allows user-defined hysteresis width-critical for noise-immune window detection in motor control or power supply sequencing. The absence of built-in hysteresis also avoids fixed offset errors that could compromise precision reference comparisons.
Can the TLC354CN outputs drive a 5-V logic input directly?
Yes-the TLC354CN outputs are n-channel open-drain and fully compatible with 5-V TTL, MOS, and CMOS logic families when used with an external pull-up resistor to 5 V. The device specifies VOL ≤ 200 mV at IOL = 0.6 mA (VDD = 1.4 V) and ≤ 400 mV at IOL = 4 mA (VDD = 5 V), meeting standard 5-V logic LOW thresholds. No level-shifting circuitry is needed, simplifying interface design in mixed-voltage systems.
What is the maximum input common-mode voltage range for the TLC354CN?
At VDD = 5 V and TA = 25°C, the TLC354CN supports a common-mode input range of 0 V to VDD–1 V (i.e., 0–4 V). Over full temperature range (0°C to 70°C), this extends to 0 V to VDD–1.5 V. The lower bound includes ground, allowing direct sensing of signals referenced to system GND-such as thermistor dividers or current-sense amplifier outputs-without level-shifting circuitry.
Is the TLC354CN pin-compatible with other quad comparators in PDIP-14 packages?
Yes-the TLC354CN shares identical pinout and footprint with the industry-standard LM339N (PDIP-14), as confirmed in TI's SLCS116B datasheet and packaging addendum. This enables drop-in replacement in legacy designs. However, note that electrical characteristics differ significantly: TLC354CN offers 5 pA vs. 250 nA input bias current, 1.4-V vs. 2-V minimum supply, and LinCMOS™ vs. bipolar input stage-requiring validation of noise immunity and response time in the target application.
TLC354CN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Series:
- LinCMOS™
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Differential
- Number of Elements:
- 4
- Output Type:
- CMOS, MOS, Open-Drain, TTL
- Voltage - Supply, Single/Dual (±):
- 1.4V ~ 16V, ±0.7V ~ 8V
- :
- 5mV @ 5V
- Voltage - Input Offset (Max):
- 5pA @ 5V
- Current - Input Bias (Max):
- 20mA
- Current - Output (Typ):
- 800µA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- 0°C ~ 70°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Through Hole
- :
- 14-PDIP
TLC354CN FAQ
1.How can I place an order for TLC354CN through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC354CN 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 TLC354CN reliable?
The price and inventory of TLC354CN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC354CN is usually 5 days.
3.What payment methods are accepted for TLC354CN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC354CN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC354CN?
TLC354CN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC354CN 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 TLC354CN?
For technical support, including TLC354CN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC354CN requirements.
6.How does Aetrix verify that TLC354CN is sourced from the original manufacturer or authorized distributors?
All TLC354CN 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 TLC354CN meets industry standards.
7.What is the process for return or replacement of TLC354CN?
All TLC354CN units undergo pre-shipment inspection (PSI). If there is an issue with TLC354CN, 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 TLC354CN part is unused and in its original packaging.
Return procedure for TLC354CN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC354CN Tags
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