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Texas Instruments TLC352CDR
- Part No.:
- TLC352CDR
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLC352CDR.pdf
- Description:
- IC COMPARATOR 2 DIFF 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,553
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Product details
Overview
TLC352CDR from Texas Instruments is a dual CMOS voltage comparator with open-drain outputs, designed for low-power, single- or dual-supply operation across 2.7V–18V. It delivers 150µA typical supply current at 5V, 5mV max input offset voltage at 25°C, and 200ns typical propagation delay - enabling precision threshold detection in battery-powered sensor interfaces and power management circuits.
For engineers reviewing the TLC352CDR datasheet, TLC352CDR pinout, TLC352CDR application, or TLC352CDR equivalent, key selection criteria include its rail-to-rail common-mode input range (including ground), ultra-low 5pA typical input bias current, TTL/MOS/CMOS-compatible open-drain outputs, and SOIC-8 packaging optimized for space-constrained industrial control and portable instrumentation designs.
Technical Context
The TLC352CDR implements two independent high-impedance CMOS differential comparators on a single die, each featuring an n-channel open-drain output stage that sinks current only and requires external pull-up for logic-high assertion. Its input stage operates with >10¹²Ω impedance and supports common-mode voltages from ground to VDD−1.5V over full temperature range.
Designed for micro-power systems, the device maintains stable performance across 0°C to 70°C ambient, with ESD protection rated at 2000V per HBM and absolute maximum supply voltage of 18V. The open-drain architecture enables wired-AND logic functions and level translation between disparate supply domains without internal clamping diodes limiting interface flexibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 18V - supports direct integration into 3.3V, 5V, and 12V systems without level-shifting circuitry |
| Input Offset Voltage | 5mV max at 25°C - ensures accurate threshold detection in precision analog monitoring applications |
| Supply Current | 150µA typical at 5V - enables multi-year battery life in always-on sensor nodes and portable equipment |
| Input Bias Current | 5pA typical - preserves signal integrity when interfacing with high-impedance sources like photodiodes or pH electrodes |
| Propagation Delay | 200ns typical at 5V - provides fast response for overvoltage/undervoltage protection and real-time fault detection |
| Common-Mode Input Range | Includes ground to VDD−1.5V - allows direct sensing of signals referenced to system ground or negative rails |
| Output Configuration | N-channel open-drain - enables flexible logic-level translation, wired-AND bus architectures, and compatibility with 3.3V/5V/15V pull-up domains |
Pinout & Package
SOIC-8 (D) package: 3.91mm width, 1.75mm max height, 1.27mm lead pitch, RoHS-compliant NiPdAu finish, MSL Level-1 (260°C reflow unlimited).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Open-drain output of Comparator A - must be pulled up externally to define logic HIGH voltage level |
| 2 | IN− A | Inverting input of Comparator A - accepts voltage down to ground; high-impedance node minimizes loading |
| 3 | IN+ A | Non-inverting input of Comparator A - supports common-mode range from ground to VDD−1.5V |
| 4 | GND | Analog/digital ground reference - shared return path for both comparators and supply current |
| 5 | IN+ B | Non-inverting input of Comparator B - electrically isolated from Channel A; identical input specs |
| 6 | IN− B | Inverting input of Comparator B - supports same common-mode and bias current specs as Channel A |
| 7 | OUT B | Open-drain output of Comparator B - independently configurable; supports wired-AND with OUT A |
| 8 | VDD | Positive supply rail - powers both comparators; tolerant of 2.7V–18V with no reverse-polarity protection |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input bias current | 5pA typical - eliminates significant error voltage across high-value feedback or sensing resistors |
| Single-supply operation from 2.7V | Enables direct use in Li-ion (3.0–4.2V) and coin-cell (3V) powered systems without boost converters |
| ESD protection | 2000V HBM rating - reduces need for external transient suppression in board-level ESD zones |
| Pin-compatible with LM393 | Direct drop-in replacement in legacy designs while delivering lower power and higher input impedance |
| Rail-to-rail input capability | Common-mode range includes ground - simplifies design of zero-crossing detectors and battery voltage monitors |
Applications
| Battery Voltage Monitoring | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Detecting low battery condition in handheld medical devices using a resistive divider from a 3.7V Li-ion cell. IC Role / Device Role / Timing Role: Dual comparator configured as window detector - one channel triggers at 3.2V (low warning), second at 2.8V (shutdown threshold). Use Value: 150µA total quiescent current extends operational runtime by minimizing standby drain; open-drain outputs interface directly with MCU GPIOs or enable lines. | Use Scenario: Preventing damage to downstream 5V logic from accidental 12V supply misconnection in industrial I/O modules. IC Role / Device Role / Timing Role: Comparator compares sensed rail voltage against 5.5V reference; output drives MOSFET gate to disconnect load within 200ns. Use Value: 200ns propagation delay ensures sub-microsecond fault response; 18V absolute max rating tolerates transient overshoot beyond nominal 12V supply. |
| Photodiode Signal Thresholding | Temperature Sensor Interface |
Use Scenario: Converting analog photocurrent from a high-impedance photodiode into digital presence/absence signal in optical encoders. IC Role / Device Role / Timing Role: Single comparator channel amplifies and compares photodiode output against adjustable reference; open-drain output drives optocoupler LED. Use Value: 5pA input bias current prevents signal corruption from leakage across GΩ-scale transimpedance gain resistors. | Use Scenario: Interfacing with PT100 RTD bridge outputs in HVAC control panels requiring precise 0°C–100°C measurement. IC Role / Device Role / Timing Role: Comparator detects bridge imbalance voltage crossing calibrated thresholds for fan speed staging or alarm activation. Use Value: 5mV max input offset voltage limits temperature measurement error to <0.5°C at mid-range; rail-to-rail inputs accommodate bridge common-mode swing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM393DR | Higher 250µA supply current; 7mV max offset; bipolar input stage; no ESD rating specified | Less suitable for battery-critical designs; lower input impedance (2MΩ) limits high-Z source interfacing | Select LM393DR only when cost is primary constraint and 5pA bias current or 150µA quiescent draw are non-critical |
| TLC372CDR | Same SOIC-8 package; 75µA/ch supply current; 5mV max offset; identical pinout and CMOS input architecture | Optimized for even lower power but shares same functional scope and layout compatibility | Prefer TLC372CDR when extending battery life is paramount and propagation delay >300ns is acceptable |
Compared with LM393DR and TLC372CDR, the TLC352CDR strikes a balanced trade-off: lower power than LM393DR with proven robustness in field-deployed industrial sensors, and faster response than TLC372CDR while maintaining identical PCB footprint and supply voltage flexibility.
Availability
TLC352CDR is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial power supervision, optical sensing interfaces, and embedded safety monitoring requiring stable component supply across extended product lifecycles.
Supply support for TLC352CDR 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 and embedded processing technologies, with decades of expertise in precision analog IC design and high-volume manufacturing reliability.
The TLC352 belongs to TI's precision comparator product line, engineered specifically for low-power, high-input-impedance applications including portable medical devices, battery management systems, and industrial sensor signal conditioning where accuracy and energy efficiency are critical.
FAQ
What is the operating temperature range for the TLC352CDR?
The TLC352CDR is characterized for operation from 0°C to 70°C ambient temperature. This commercial-grade specification aligns with the "C" suffix in the part number and is validated per TI's production test conditions. The device maintains all published electrical characteristics-including 5mV max input offset voltage and 150µA typical supply current-within this full range. For extended industrial environments (−40°C to 85°C), the TLC352IDR variant is specified.
Does the TLC352CDR support dual-supply operation?
Yes, the TLC352CDR supports dual-supply operation provided the difference between the positive and negative supplies is maintained within 2.7V to 18V. The device does not require a dedicated ground reference; the negative supply rail serves as the common reference point. Input common-mode range extends to the negative rail, and outputs are referenced to the same negative supply. This configuration is commonly used in audio signal detection and bipolar sensor interfaces where split-rail operation improves dynamic range.
Can the TLC352CDR outputs drive TTL logic directly?
No, the TLC352CDR outputs are n-channel open-drain and cannot actively drive a logic HIGH level. To interface with TTL inputs, an external pull-up resistor to a compatible voltage (e.g., 5V) is required. With appropriate pull-up sizing (typically 1kΩ–10kΩ), the output can sink sufficient current to meet TTL LOW-level input requirements (≤0.8V at 1.6mA). The open-drain structure also enables wired-AND functionality and level translation-e.g., driving a 3.3V MCU input using a 3.3V pull-up while powered from a 5V supply.
What is the maximum capacitive load the TLC352CDR can drive reliably?
The TLC352CDR's propagation delay and rise time are directly affected by load capacitance. Per TI's characterization, switching performance is specified with CL = 15pF (including probe and jig capacitance). Driving loads exceeding 50pF may degrade response time beyond 200ns and increase rise time due to RC time constant effects. For reliable operation with >50pF loads, reduce the pull-up resistor value to maintain edge speed-but verify resulting VOL remains within logic LOW specifications (≤400mV at 4mA sink current) and power dissipation stays within safe limits.
Is the TLC352CDR pin-compatible with the LM393?
Yes, the TLC352CDR is explicitly designed as a pin-compatible upgrade to the LM393 in SOIC-8 (D) packaging. Both devices share identical pin assignments: OUT A, IN− A, IN+ A, GND, IN+ B, IN− B, OUT B, VDD. This allows direct replacement in existing LM393 layouts without PCB modification. However, designers must verify that the TLC352CDR's CMOS input stage (10¹²Ω impedance, 5pA bias current) and open-drain output behavior meet system requirements-particularly where LM393's bipolar inputs or internal pull-ups were previously relied upon.
TLC352CDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- LinCMOS™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Differential
- Number of Elements:
- 2
- 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):
- 400µA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- 0°C ~ 70°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
TLC352CDR FAQ
1.How can I place an order for TLC352CDR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC352CDR 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 TLC352CDR reliable?
The price and inventory of TLC352CDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC352CDR is usually 5 days.
3.What payment methods are accepted for TLC352CDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC352CDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC352CDR?
TLC352CDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC352CDR 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 TLC352CDR?
For technical support, including TLC352CDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC352CDR requirements.
6.How does Aetrix verify that TLC352CDR is sourced from the original manufacturer or authorized distributors?
All TLC352CDR 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 TLC352CDR meets industry standards.
7.What is the process for return or replacement of TLC352CDR?
All TLC352CDR units undergo pre-shipment inspection (PSI). If there is an issue with TLC352CDR, 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 TLC352CDR part is unused and in its original packaging.
Return procedure for TLC352CDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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