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Texas Instruments TL712CDG4
- Part No.:
- TL712CDG4
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TL712CDG4.pdf
- Description:
- IC COMPARATOR 1 DIFF 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,281
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Product details
Overview
TL712CDG4 from Texas Instruments is a high-speed bipolar Schottky comparator with differential analog inputs, complementary 3-state TTL-compatible outputs, 5 mV typical hysteresis, 25 ns typical propagation delay, and operation from a single 5-V supply. It serves as a disk memory read-chain data comparator in digital storage systems.
For engineers reviewing the TL712CDG4 datasheet, TL712CDG4 pinout, TL712CDG4 application, or TL712CDG4 equivalent, key selection considerations include its 0–5.5 V common-mode input range, self-biased inputs, enable-controlled 3-state outputs, and SOIC-8 package compatibility with legacy TTL logic interfaces.
Technical Context
The TL712CDG4 implements a fully differential input stage with internal biasing, eliminating external resistor networks. Its output stage delivers symmetrical switching characteristics and supports TTL-level interfacing via complementary OUT+ and OUT− signals.
Enable (OE) control operates with active-low logic, placing both outputs in high-impedance state when asserted. Input hysteresis of 5 mV typ ensures noise immunity without external feedback components, and the device maintains stable operation across 0°C to 70°C ambient temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.75 V to 5.25 V - Ensures compatibility with standard 5-V TTL/CMOS logic rails and stable internal biasing. |
| Propagation Delay | 25 ns typ - Enables high-speed decision-making in disk read channels and real-time signal discrimination. |
| Hysteresis | 5 mV typ - Provides built-in noise rejection for reliable threshold detection without external hysteresis circuitry. |
| Common-Mode Range | 0 V to 5.5 V - Supports direct connection to unbuffered analog sources referenced to system ground or VCC. |
| Output Type | Complementary 3-state TTL - Allows wired-OR bus sharing and seamless integration into legacy digital subsystems. |
| Input Resistance | 4 kΩ differential - Minimizes loading on preceding gain stages while maintaining predictable input impedance. |
Pinout & Package
TL712CDG4 is housed in an 8-pin SOIC (D) package with 1.27 mm lead pitch, 3.91 mm body width, and 4.9 mm body length per TI's D0008A outline. Pin 1 is located at the top-left corner adjacent to the notch or dot marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No internal connection | Unused pad; must remain unconnected to avoid parasitic coupling or mechanical stress. |
| 2 (IN−) | Inverting analog input | Differential input node referenced internally; accepts signals up to 5.5 V common-mode. |
| 3 (IN+) | Non-inverting analog input | Differential input node with self-bias; enables threshold comparison without external resistors. |
| 4 (OE) | Output enable (active low) | Asserting low disables both outputs into high-Z; critical for bus arbitration in multi-comparator systems. |
| 5 (VCC) | Positive supply | Single 5-V rail powers all internal circuitry; no separate logic or analog supply required. |
| 6 (OUT−) | Inverted TTL output | Active-low complement of OUT+; enables differential signaling or direct NAND gate interfacing. |
| 7 (OUT+) | Non-inverted TTL output | Active-high output aligned with input polarity; drives standard TTL loads up to 16 mA sink. |
| 8 (GND) | Ground reference | Return path for supply current and output loads; requires low-impedance PCB plane for noise control. |
Key Features
| Feature | Design Value |
|---|---|
| Self-biased inputs | Eliminates need for external bias resistors, reducing BOM count and layout area in space-constrained read-channel designs. |
| Complementary 3-state outputs | Enables shared-bus architectures where multiple comparators drive the same data line without contention. |
| 5 mV typical hysteresis | Suppresses chatter on slow or noisy input edges-critical for reliable disk sector boundary detection. |
| 25 ns propagation delay | Supports >30 MHz decision rates in high-throughput storage interfaces with minimal timing uncertainty. |
| 0–5.5 V common-mode range | Accepts direct connection to DAC outputs, sensor amplifiers, or unbuffered ADC references without level-shifting. |
Applications
| Disk Memory Read Channel | High-Speed Data Acquisition |
|---|---|
Use Scenario: Detecting magnetic flux transitions during hard disk drive head readback. IC Role / Device Role / Timing Role: High-speed comparator converting analog readback waveform into clean digital NRZ data stream. Use Value: 25 ns response time ensures accurate sampling of narrow pulse widths at rotational speeds up to 7200 RPM. | Use Scenario: Threshold triggering in oscilloscope front-end or logic analyzer sampling circuits. IC Role / Device Role / Timing Role: Real-time signal edge detector feeding FPGA or microcontroller interrupt inputs. Use Value: Self-biased inputs and 5 mV hysteresis prevent false triggers from analog noise below 100 mV overdrive. |
| Industrial Position Sensing | TTL-Compatible Level Translation |
Use Scenario: Converting linear Hall-effect sensor output into direction-encoded quadrature pulses. IC Role / Device Role / Timing Role: Differential comparator discriminating small voltage differences between two analog position signals. Use Value: 0–5.5 V common-mode range accommodates sensor outputs spanning rail-to-rail without attenuation. | Use Scenario: Interfacing legacy 5-V TTL logic with modern mixed-signal controllers operating at 3.3 V. IC Role / Device Role / Timing Role: Bidirectional level translator using complementary outputs to preserve signal polarity and timing. Use Value: Complementary 3-state outputs allow dynamic bus control without additional direction pins or buffers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM311DR | Open-collector output, no built-in hysteresis, requires external pull-up and hysteresis resistors. | Suitable for general-purpose analog thresholding but lacks integrated 3-state bus interface. | Choose LM311DR only if open-collector flexibility and cost sensitivity outweigh need for TTL compatibility and hysteresis integration. |
| TL3016CD | Faster 4.5 ns propagation delay, higher 100 mA output drive, but consumes 3× more supply current (60 mA vs 20 mA). | Better suited for ultra-high-speed test equipment; less optimal for power-constrained embedded read channels. | Select TL3016CD when sub-5 ns timing resolution is mandatory and thermal/power budgets permit higher dissipation. |
Compared with TL712CDG4, LM311DR requires external components to achieve basic functionality, while TL3016CD trades power efficiency and integration for raw speed-making TL712CDG4 the balanced choice for legacy-compatible, medium-speed digital storage interfaces.
Availability
TL712CDG4 is available at Aetrix Electronics and suitable for disk memory read chains, industrial position sensing systems, and high-speed data acquisition requiring stable component supply and long-term obsolescence management.
Supply support for TL712CDG4 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 since 1930.
The TL712CDG4 belongs to TI's legacy high-speed comparator product line, designed specifically for reliable, low-latency signal discrimination in disk drive electronics and industrial control systems.
FAQ
What is the supply voltage range for TL712CDG4?
The TL712CDG4 operates from a single 5-V supply with a recommended range of 4.75 V to 5.25 V. Absolute maximum supply voltage is 7 V, but sustained operation outside the recommended range may degrade performance or reliability. The TL712CDG4 does not support dual-supply or split-rail configurations.
Does TL712CDG4 require external hysteresis resistors?
No, the TL712CDG4 includes 5 mV typical internal hysteresis, eliminating the need for external feedback resistors. This built-in hysteresis improves noise immunity for analog inputs near the switching threshold. External hysteresis can be added if greater noise margin is required, but it is not necessary for standard operation of the TL712CDG4.
What is the function of the NC pin on TL712CDG4?
Pin 1 of the TL712CDG4 is marked NC (No Connection) and has no internal connection. It must remain unconnected on the PCB to avoid mechanical stress, parasitic capacitance, or unintended coupling. TI's D0008A package drawing confirms this pin is unused, and routing or soldering to it is not recommended for the TL712CDG4.
Can TL712CDG4 drive standard TTL loads directly?
Yes, the TL712CDG4 features complementary TTL-compatible outputs capable of sourcing ≥2.7 V and sinking ≤0.5 V at specified load currents (IOH = −1 mA, IOL = 16 mA). Its outputs meet standard TTL voltage thresholds and can interface directly with 74LS, 74F, and other TTL families without level-shifting circuitry-confirming full interoperability in legacy systems using TL712CDG4.
What is the operating temperature range for TL712CDG4?
The TL712CDG4 is rated for operation from 0°C to 70°C ambient temperature. This commercial-grade specification aligns with its intended use in disk drive electronics and industrial control modules where environmental conditions remain within controlled enclosures. Derating is required above 70°C, and extended temperature variants (e.g., TL712ID) are not offered for the TL712CDG4 part number.
TL712CDG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Differential
- Number of Elements:
- 1
- Output Type:
- Complementary, Push-Pull, Tri-State, TTL
- Voltage - Supply, Single/Dual (±):
- 4.75V ~ 5.25V
- :
- -
- Voltage - Input Offset (Max):
- -
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 20mA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- 25ns
- Propagation Delay (Max):
- 5mV
- Hysteresis:
- 0°C ~ 70°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
TL712CDG4 FAQ
1.How can I place an order for TL712CDG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TL712CDG4 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 TL712CDG4 reliable?
The price and inventory of TL712CDG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL712CDG4 is usually 5 days.
3.What payment methods are accepted for TL712CDG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL712CDG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL712CDG4?
TL712CDG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL712CDG4 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 TL712CDG4?
For technical support, including TL712CDG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL712CDG4 requirements.
6.How does Aetrix verify that TL712CDG4 is sourced from the original manufacturer or authorized distributors?
All TL712CDG4 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 TL712CDG4 meets industry standards.
7.What is the process for return or replacement of TL712CDG4?
All TL712CDG4 units undergo pre-shipment inspection (PSI). If there is an issue with TL712CDG4, 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 TL712CDG4 part is unused and in its original packaging.
Return procedure for TL712CDG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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