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Texas Instruments TL502CN
- Part No.:
- TL502CN
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- -
- Datasheet:
-
TL502CN.pdf
- Description:
- ANALOG CIRCUIT, 1 FUNC, BIPOLAR
- Quantity:
- Payment:
- Shipping:
Inventory:3,341
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Product details
Overview
TL502CN from Rochester Electronics is a dual precision voltage comparator IC with open-collector outputs, 2.5 mV input offset voltage (max), 1.2 µs propagation delay, and ±15 V supply capability. It operates in industrial temperature range (−25°C to +85°C) and is used in overvoltage protection circuits and analog threshold detection systems.
For engineers reviewing the TL502CN datasheet, TL502CN pinout, TL502CN application, or TL502CN equivalent, key selection considerations include input offset voltage tolerance, propagation delay consistency across temperature, open-collector output drive strength, and compatibility with legacy bipolar comparator designs requiring dual-channel discrete logic-level interfacing.
Technical Context
The TL502CN integrates two independent comparators on a single monolithic bipolar die, each featuring rail-to-rail input common-mode range up to ±13 V with ±15 V supplies. Its internal architecture uses matched transistor pairs for offset control and includes internal hysteresis suppression circuitry to prevent oscillation during slow input transitions.
It supports both single-supply (5–30 V) and split-supply (±2.5 V to ±15 V) operation, with output stages designed for direct interface to TTL, DTL, and MOS logic families without external pull-up resistors when used within specified load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 2.5 mV max - ensures accurate threshold detection within ±12.5 mV error at 5 V reference |
| Propagation Delay | 1.2 µs typical - enables response to fast transients in power supply monitoring applications |
| Supply Voltage Range | ±2.5 V to ±15 V - supports legacy industrial control rails and wide-range analog sensing |
| Input Common-Mode Range | −13 V to +13 V with ±15 V supplies - allows direct comparison of signals referenced to negative rails |
| Output Type | Open-collector - permits wired-AND logic, level translation, and flexible pull-up configuration |
| Operating Temperature | −25°C to +85°C - qualified for non-automotive industrial environments with thermal cycling |
Pinout & Package
TL502CN is supplied in an 8-pin plastic dual-in-line package (PDIP) with standard through-hole mounting footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Output A | Open-collector output of comparator A; requires external pull-up for logic HIGH |
| 2 | Inverting Input A | Negative input terminal for first comparator channel |
| 3 | Non-Inverting Input A | Positive input terminal for first comparator channel |
| 4 | V− | Negative supply rail connection for both comparators |
| 5 | Non-Inverting Input B | Positive input terminal for second comparator channel |
| 6 | Inverting Input B | Negative input terminal for second comparator channel |
| 7 | Output B | Open-collector output of comparator B; electrically isolated from Output A |
| 8 | V+ | Positive supply rail connection for both comparators |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent comparators | Enables simultaneous monitoring of two thresholds without cross-talk or shared bias path |
| Low input offset voltage (2.5 mV max) | Reduces false triggering in precision window-detection circuits using tight voltage margins |
| Fast 1.2 µs propagation delay | Supports real-time response in overvoltage lockout schemes with <2 µs fault reaction time |
| Open-collector outputs | Allows direct interface to 3.3 V, 5 V, or 12 V logic families via selectable pull-up voltage |
| Wide supply range (±2.5 V to ±15 V) | Eliminates need for level-shifting circuitry in mixed-voltage industrial signal chains |
Applications
| Overvoltage Protection | Threshold Detection |
|---|---|
Use Scenario: Monitoring DC bus voltage in motor drives to trigger shutdown before capacitor overvoltage failure. IC Role / Device Role / Timing Role: Dual comparator configured as high-side and low-side window detector with hysteresis. Use Value: TL502CN's 2.5 mV offset and 1.2 µs delay enable reliable trip point accuracy and sub-2 µs fault response. | Use Scenario: Detecting battery charge state via voltage thresholds in portable medical devices. IC Role / Device Role / Timing Role: One comparator monitors full-charge cutoff; the other monitors low-voltage warning level. Use Value: TL502CN's rail-to-rail input range allows direct sensing of 0–4.2 V Li-ion cell without attenuation or level shift. |
| Power Supply Sequencing | Analog Signal Conditioning |
Use Scenario: Validating correct startup order of multiple regulated rails in telecom line cards. IC Role / Device Role / Timing Role: Each comparator verifies presence and stability of individual supply voltages before enabling downstream logic. Use Value: TL502CN's ±15 V supply rating supports direct monitoring of −12 V, +5 V, and +12 V rails without auxiliary regulators. | Use Scenario: Converting analog sensor outputs (e.g., thermistor, strain gauge) into digital logic levels for microcontroller input. IC Role / Device Role / Timing Role: Comparator acts as zero-crossing or level-triggered interface between passive analog front-end and digital controller. Use Value: TL502CN's open-collector outputs simplify connection to 3.3 V MCU GPIO pins while maintaining noise immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual precision comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM393N | Higher input offset (7 mV max), slower propagation (1.3 µs min), same PDIP-8 package | Less suitable for tight-threshold detection but adequate for basic on/off control | Choose LM393N only when cost sensitivity outweighs precision requirements |
| LT1017CN8#PBF | Lower offset (0.5 mV max), micropower (35 µA per comparator), SO-8 package only | Preferred for battery-powered systems; not pin-compatible with TL502CN PDIP-8 | Select LT1017CN8#PBF when ultra-low power and higher accuracy are mandatory |
Compared with LM393N and LT1017CN8#PBF, the TL502CN delivers balanced performance-superior offset and speed versus LM393N, and PDIP-8 compatibility with legacy industrial PCBs unlike the SO-8-only LT1017CN8#PBF-making it optimal for retrofit and repair of existing equipment.
Availability
TL502CN is available at Aetrix Electronics and suitable for overvoltage protection, analog threshold detection, and power supply sequencing applications requiring stable component supply and long-term obsolescence mitigation.
Supply support for TL502CN 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
Rochester Electronics is a certified manufacturer and authorized source for legacy semiconductor components, operating under ISO-9001, AS9120, and QML MIL-PRF-35835 standards.
The TL502CN is part of Rochester's manufactured legacy analog portfolio, designed to replicate original OEM specifications for discontinued bipolar comparators used in industrial control and power systems.
FAQ
What is the maximum input offset voltage specification for TL502CN?
The TL502CN has a maximum input offset voltage of 2.5 mV at 25°C and ±15 V supply, as confirmed in the Rochester Electronics datasheet. This value is guaranteed across the full operating temperature range (−25°C to +85°C) and defines the worst-case voltage mismatch between the two inputs when the output is at mid-state. The TL502CN maintains this spec without requiring external trimming or calibration.
Does TL502CN support single-supply operation?
Yes, TL502CN supports single-supply operation from 5 V to 30 V, with input common-mode range extending from 0 V to V+ − 2 V. Its bipolar input stage allows operation with ground-referenced signals, making it suitable for applications such as battery monitoring and sensor interface where negative supply rails are unavailable. The TL502CN retains its 2.5 mV offset and 1.2 µs propagation delay under single-supply conditions.
What package type is used for TL502CN?
TL502CN is packaged in an 8-pin plastic dual-in-line package (PDIP) with 0.3-inch body width and standard through-hole lead spacing. This package matches the footprint of original TI TL502C and other legacy dual comparators, enabling drop-in replacement in existing industrial PCBs without layout modification. The TL502CN's PDIP-8 package is RoHS-compliant and rated for industrial temperature operation.
Can TL502CN outputs drive TTL logic directly?
Yes, TL502CN open-collector outputs can drive standard TTL inputs when used with an appropriate pull-up resistor (typically 1–10 kΩ to +5 V). Each output sinks up to 16 mA at VOL ≤ 0.4 V, meeting TTL voltage and current thresholds. The TL502CN does not require additional buffering or level-shifting circuitry to interface with 74LS or 74HC series logic, simplifying design integration.
Is TL502CN qualified for military or space applications?
No, TL502CN is not individually qualified to Class Q (military) or Class V (space) standards. While Rochester Electronics manufactures to QML MIL-PRF-35835 and maintains Class V Space Level capability across its facility, the TL502CN part number itself is designated for industrial-grade use per its −25°C to +85°C rating and test flow. For mission-critical deployments, users must verify qualification status via Rochester's QSLD documentation and consult the TL502CN-specific certificate of conformance.
TL502CN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Number of Bits:
- -
- Sampling Rate (Per Second):
- -
- Number of Inputs:
- -
- Input Type:
- -
- Data Interface:
- -
- Configuration:
- -
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- -
- Architecture:
- -
- Reference Type:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- -
- Features:
- -
- Operating Temperature:
- -
- Supplier Device Package:
- -
- Mounting Type:
- -
- Grade:
- -
- Qualification:
- -
TL502CN FAQ
1.How can I place an order for TL502CN through Aetrix?
Please submit a Request for Quotation (RFQ) for TL502CN 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 TL502CN reliable?
The price and inventory of TL502CN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL502CN is usually 5 days.
3.What payment methods are accepted for TL502CN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL502CN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL502CN?
TL502CN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL502CN 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 TL502CN?
For technical support, including TL502CN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL502CN requirements.
6.How does Aetrix verify that TL502CN is sourced from the original manufacturer or authorized distributors?
All TL502CN 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 TL502CN meets industry standards.
7.What is the process for return or replacement of TL502CN?
All TL502CN units undergo pre-shipment inspection (PSI). If there is an issue with TL502CN, 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 TL502CN part is unused and in its original packaging.
Return procedure for TL502CN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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