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Texas Instruments TL712CP
- Part No.:
- TL712CP
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
TL712CP.pdf
- Description:
- IC COMPARATOR 1 DIFF 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:667
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Product details
Overview
TL712CP from Texas Instruments is a high-speed bipolar Schottky comparator with differential analog inputs, complementary 3-state TTL-compatible outputs, 25 ns typical propagation delay, 5 mV typical hysteresis, and operation from a single 5-V supply. It serves as a disk memory read-chain data comparator in legacy storage interfaces.
For engineers reviewing the TL712CP datasheet, TL712CP pinout, TL712CP application, or TL712CP equivalent, this page delivers verified electrical specs, PDIP-8 package details, enable-controlled 3-state output behavior, common-mode input range (0 V to 5.5 V), and direct alternatives for high-speed comparator replacement in industrial and computing systems.
Technical Context
The TL712CP implements self-biased differential inputs with 4 kΩ nominal input resistance and symmetrical switching thresholds (±100 mV). Its complementary outputs drive TTL loads with VOH ≥ 2.7 V at −1 mA and VOL ≤ 0.5 V at 16 mA.
Output enable (OE) controls high-impedance state on both OUT+ and OUT− simultaneously. The device operates within 0°C to 70°C ambient temperature and draws 17–20 mA supply current under no-load conditions at VCC = 5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.75 V to 5.25 V - ensures stable TTL-level logic compatibility and noise margin in 5-V systems. |
| Propagation Delay | 25 ns typ - enables high-speed decision-making in disk read channels and real-time signal discrimination. |
| Hysteresis | 5 mV typ - suppresses output oscillation near threshold during slow or noisy input transitions. |
| Common-Mode Input Range | 0 V to 5.5 V - supports rail-to-rail input sensing without external level-shifting circuitry. |
| Output Type | Complementary 3-state TTL - allows wired-OR bus sharing and multiplexed output routing in multi-comparator systems. |
| Enable Function | Active-low OE pin - permits dynamic output disabling for power gating or time-multiplexed comparator banks. |
| Input Resistance | 4 kΩ differential - defines loading impact on preceding analog stages and sets gain/attenuation in resistive divider networks. |
Pinout & Package
TL712CP is housed in an 8-pin plastic dual in-line package (PDIP), with 0.3-inch body width and through-hole mounting. 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 | Accepts reference or inverted signal path; differential pair with IN+ sets switching threshold. |
| 3 (IN+) | Non-inverting analog input | Accepts sensed signal; combined with IN− determines comparator decision polarity and hysteresis center. |
| 4 (OE) | Output enable (active low) | Pulls both outputs to high-Z when logic low; enables shared bus architectures and power sequencing control. |
| 5 (VCC) | Positive supply | Provides bias for internal Schottky transistors; requires local 0.1 µF ceramic decoupling. |
| 6 (OUT−) | Inverted TTL output | Logic-high when IN+ < IN−; complements OUT+ for differential signaling or latch interface. |
| 7 (OUT+) | Non-inverted TTL output | Logic-high when IN+ > IN−; drives standard TTL loads up to 16 mA sink current. |
| 8 (GND) | Ground reference | Return path for supply and output currents; must be low-impedance and separated from analog ground if mixed-signal layout used. |
Key Features
| Feature | Design Value |
|---|---|
| Self-biased inputs | Eliminates need for external biasing resistors, simplifying PCB layout and reducing component count in threshold-detection circuits. |
| Complementary 3-state outputs | Enables direct connection to shared data buses without external OR gates or isolation logic, supporting multi-drop comparator configurations. |
| Single 5-V supply operation | Removes requirement for split or adjustable supplies, lowering system BOM cost and simplifying power architecture in legacy 5-V designs. |
| 25 ns propagation delay | Supports sampling rates up to ~20 MHz in open-loop comparison, suitable for high-speed disk read channel timing windows. |
| 0 V to 5.5 V common-mode range | Allows direct interfacing with DAC outputs, sensor amplifiers, or ADC references operating near supply rails without attenuation or clamping. |
Applications
| Disk Memory Read Channel | Threshold Detection in Data Acquisition |
|---|---|
Use Scenario: Detecting magnetic flux transitions from rotating disk platters in legacy floppy or hard disk controllers. IC Role / Device Role / Timing Role: High-speed comparator converting analog read-head signals into clean digital data pulses synchronized to clock domains. Use Value: 25 ns response ensures accurate pulse edge capture within tight timing budgets of disk sector decoding logic. | Use Scenario: Converting analog sensor outputs (e.g., temperature, pressure) into binary triggers for alarm or control logic. IC Role / Device Role / Timing Role: Precision threshold detector with built-in hysteresis preventing chatter on slowly varying or noisy inputs. Use Value: 5 mV hysteresis eliminates false triggering while maintaining sub-millivolt resolution for fine-grained event detection. |
| Bus Arbitration Logic | TTL-Level Signal Conditioning |
Use Scenario: Resolving priority among multiple microcontrollers or peripherals competing for shared address/data bus access. IC Role / Device Role / Timing Role: Comparator enabling/disabling tri-state buffers based on encoded priority voltage levels. Use Value: Complementary 3-state outputs allow direct bus-driving without additional logic, reducing latency and gate count. | Use Scenario: Cleaning up degraded or attenuated TTL signals before feeding into clock inputs or synchronous logic blocks. IC Role / Device Role / Timing Role: Regenerative signal restorer using differential input to reject common-mode noise on long traces. Use Value: 0–5.5 V common-mode range accommodates signal droop across backplanes while preserving logic margins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM311N | Open-collector output, no 3-state capability; 115 ns typical response; wider supply range (5–36 V). | Requires pull-up resistor and external logic for bus sharing; better suited for wide-supply industrial sensors than TTL bus interfacing. | Select LM311N only when single-ended output and high-voltage operation outweigh need for speed and bus compatibility. |
| TL3016CP | 30 ns typical propagation delay; rail-to-rail input; no integrated hysteresis; requires external feedback for hysteresis. | Higher precision input stage but lacks built-in hysteresis; demands additional passive components for noise immunity. | Choose TL3016CP when input offset voltage (<1.5 mV) and rail-to-rail operation are critical, and board space allows hysteresis network. |
Compared with TL712CP, LM311N trades speed and 3-state functionality for supply flexibility and ruggedness, while TL3016CP offers improved DC accuracy at the cost of added design complexity for hysteresis implementation-neither is pin-compatible, requiring layout revision.
Availability
TL712CP is available at Aetrix Electronics and suitable for disk memory subsystems, industrial threshold monitoring, bus arbitration logic, and TTL signal conditioning requiring stable component supply across long-lifecycle embedded programs.
Supply support for TL712CP 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 company headquartered in Dallas, Texas, delivering analog, embedded processing, and logic solutions since 1930.
The TL712CP belongs to TI's legacy bipolar comparator product line, engineered specifically for high-speed, TTL-compatible decision-making in 5-V computing and storage systems of the 1980s–2000s era.
FAQ
What is the supply voltage range for TL712CP?
The TL712CP 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 risks parametric shift or reliability degradation. The TL712CP is not rated for operation below 4.75 V or above 5.25 V under normal conditions per its datasheet specifications.
Does TL712CP support rail-to-rail input operation?
Yes, TL712CP supports a 0-V to 5.5-V common-mode input voltage range, enabling it to accept signals from ground up to 0.5 V above VCC. This rail-to-rail capability allows direct interfacing with DACs, op-amp outputs, and other 5-V domain sources without level-shifting circuitry-confirmed in the "Recommended Operating Conditions" table of the SLCS002D datasheet.
How does the output enable (OE) pin function on TL712CP?
The OE pin on TL712CP is active-low: when pulled low, both OUT+ and OUT− enter high-impedance (3-state) mode; when high, outputs operate normally. This feature enables time-multiplexed or bus-shared comparator configurations. The TL712CP datasheet specifies IIL = −360 µA at VIL = 0.4 V and IIH = 20 µA at VIH = 2.7 V, confirming TTL-compatible enable logic levels.
What is the hysteresis value of TL712CP and how is it implemented?
The TL712CP provides 5 mV typical hysteresis between VT+ and VT− thresholds, achieved via internal positive feedback in its bipolar Schottky input stage. This fixed hysteresis is non-adjustable and specified over 0°C to 70°C. It suppresses output oscillation on slow-moving or noisy inputs-critical in disk read channels where analog waveforms exhibit ringing or settling delays before decision points.
Is TL712CP pin-compatible with other members of the TL712 family?
No, TL712CP (PDIP-8) is not pin-compatible with SOIC (D), SOP (PS), or TSSOP (PW) variants like TL712CD or TL712CPWR due to differing package footprints and lead pitches-even though all share identical pin functions and numbering. The TL712CP uses 0.3-inch DIP spacing, while SOIC and TSSOP use 1.27 mm and 0.65 mm pitch respectively; PCB layout must be redesigned for package substitution.
TL712CP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- 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:
- Through Hole
- :
- 8-PDIP
TL712CP FAQ
1.How can I place an order for TL712CP through Aetrix?
Please submit a Request for Quotation (RFQ) for TL712CP 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 TL712CP reliable?
The price and inventory of TL712CP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL712CP is usually 5 days.
3.What payment methods are accepted for TL712CP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL712CP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL712CP?
TL712CP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL712CP 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 TL712CP?
For technical support, including TL712CP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL712CP requirements.
6.How does Aetrix verify that TL712CP is sourced from the original manufacturer or authorized distributors?
All TL712CP 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 TL712CP meets industry standards.
7.What is the process for return or replacement of TL712CP?
All TL712CP units undergo pre-shipment inspection (PSI). If there is an issue with TL712CP, 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 TL712CP part is unused and in its original packaging.
Return procedure for TL712CP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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