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Texas Instruments TL712CPWE4
- Part No.:
- TL712CPWE4
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TL712CPWE4.pdf
- Description:
- IC COMPARATOR 1 DIFF 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,876
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Product details
Overview
TL712CPWE4 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 TL712CPWE4 datasheet, TL712CPWE4 pinout, TL712CPWE4 application, or TL712CPWE4 equivalent, key selection criteria include input common-mode range (0 V to 5.5 V), enable-controlled 3-state output behavior, self-biased inputs, low supply current (20 mA max), and TSSOP-8 packaging for space-constrained PCB layouts.
Technical Context
The TL712CPWE4 implements a differential input stage with self-biasing architecture, eliminating external biasing components. Its internal circuitry delivers symmetrical switching characteristics between OUT+ and OUT− outputs under TTL load conditions.
Enable logic operates with active-low OE control: when OE is low, both outputs enter high-impedance state; when OE is high, outputs respond to differential input voltage with 5 mV hysteresis and 25 ns response time for 100-mV input step with 5-mV overdrive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.75 V to 5.25 V - ensures stable operation within standard TTL/CMOS logic rail tolerances. |
| Common-Mode Input Range | 0 V to 5.5 V - supports direct interfacing with unbuffered digital or analog signals across full supply range. |
| Hysteresis | 5 mV typical - suppresses noise-induced output oscillation near threshold without external components. |
| Propagation Delay | 25 ns typical (tPLH/tPHL) - enables reliable sampling of high-speed data transitions in disk read channels. |
| Output Type | Complementary 3-state TTL-compatible - allows wired-OR bus sharing and eliminates need for external pull-ups. |
| Input Resistance | 4 kΩ differential - defines loading on preceding stage and supports impedance-matched signal chain design. |
| Supply Current | 20 mA maximum at 25°C - determines power budget allocation in multi-comparator timing or sensing subsystems. |
Pinout & Package
TSSOP-8 package (PW), 3.0 mm × 4.4 mm body, 1.2 mm max height, 0.65 mm lead pitch, exposed pad not present, RoHS-compliant NIPDAU finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No internal connection | Unused pin; must remain unconnected to avoid parasitic coupling or mechanical stress. |
| 2 (IN−) | Inverting input | Differential input node referenced to IN+; accepts common-mode voltages up to 5.5 V. |
| 3 (IN+) | Non-inverting input | Differential input node; self-biased internally-no external resistor network required. |
| 4 (OE) | Output enable (active-low) | Controls 3-state output driver; low = high-Z, high = active comparison mode. |
| 5 (VCC) | Positive supply | Single 5-V rail powers all internal circuitry including output drivers and bias generators. |
| 6 (OUT−) | Complementary output | Active-low logic output; sinks 16 mA or sources −1 mA under TTL load conditions. |
| 7 (OUT+) | True output | Active-high logic output; complements OUT− with matched rise/fall timing (25 ns). |
| 8 (GND) | Ground reference | Return path for supply current and output load current; requires low-impedance PCB plane. |
Key Features
| Feature | Design Value |
|---|---|
| Self-biased inputs | Eliminates need for external bias resistors, reducing BOM count and layout area in compact read-channel designs. |
| Complementary 3-state outputs | Enables direct connection to shared data buses without contention, supporting multi-drop comparator architectures. |
| 5 mV hysteresis | Provides built-in noise immunity for reliable decision-making in electrically noisy disk drive environments. |
| 25 ns propagation delay | Supports >30 MHz effective comparison rate, meeting timing requirements of legacy floppy and hard disk read chains. |
| 0 V to 5.5 V common-mode range | Allows direct interface with DAC outputs, sensor amplifiers, or logic-level signals without level-shifting circuitry. |
Applications
| Disk Memory Read Channel | High-Speed Data Threshold Detection |
|---|---|
Use Scenario: Detecting magnetic flux transitions during readback from rotating media in floppy or early HDD controllers. IC Role / Device Role / Timing Role: High-speed comparator converting analog read-head signal into clean digital data stream synchronized to clock. Use Value: 25 ns response time and 5 mV hysteresis ensure accurate pulse edge detection amid channel noise and baseline wander. | Use Scenario: Converting variable-amplitude analog pulses from optical encoders or position sensors into deterministic logic levels. IC Role / Device Role / Timing Role: Threshold detector with fast settling and symmetric output drive for downstream latch or counter input. Use Value: Complementary TTL outputs drive multiple loads directly; self-biased inputs simplify front-end design without precision references. |
| Bus Arbitration Comparator | Legacy System Logic-Level Translation |
Use Scenario: Monitoring multiple priority lines in industrial PLC backplanes where dominant-line resolution is required. IC Role / Device Role / Timing Role: Enabling/disabling bus access via OE control while comparing distributed status signals. Use Value: Active-low OE allows centralized arbitration logic to place comparator outputs in high-Z state during contention windows. | Use Scenario: Interfacing mixed-voltage subsystems (e.g., 3.3 V FPGA I/O to 5 V legacy peripherals) using comparator-based level shifting. IC Role / Device Role / Timing Role: Voltage window detector translating logic thresholds across incompatible supply domains. Use Value: 0–5.5 V common-mode range accepts inputs beyond VCC, enabling robust level translation without clamping diodes. |
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, wider supply range (5–36 V), slower response (~115 ns). | Requires external hysteresis resistor network and pull-up; suited for higher-voltage industrial sensing, not TTL bus sharing. | Select LM311DR only when open-collector flexibility and wide supply tolerance outweigh need for speed and integrated hysteresis. |
| TL3016CDR | Higher speed (4.5 ns), rail-to-rail inputs, no 3-state outputs, fixed 2.5 V reference input option. | Designed for ultra-fast ADC front-ends or laser diode drivers; lacks OE control and complementary outputs for bus use. | Choose TL3016CDR when sub-5 ns timing is critical and 3-state capability is unnecessary. |
Compared with LM311DR and TL3016CDR, the TL712CPWE4 uniquely combines TTL-compatible complementary 3-state outputs, self-biased inputs, and 25 ns speed in a single 5-V supply device-making it optimal for legacy disk controller and shared-bus comparator roles where pin count, layout simplicity, and deterministic timing are prioritized.
Availability
TL712CPWE4 is available at Aetrix Electronics and suitable for disk memory read channels, high-speed threshold detection, and bus arbitration circuits requiring stable component supply and long-term industrial availability.
Supply support for TL712CPWE4 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 connectivity solutions since 1930.
The TL712CPWE4 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 operating from single 5-V rails.
FAQ
What is the operating temperature range for the TL712CPWE4?
The TL712CPWE4 is rated for operation from 0°C to 70°C ambient temperature. This commercial-grade specification aligns with its intended use in disk memory read chains and non-automotive industrial equipment. The device's thermal resistance (θJA = 149°C/W for TSSOP-8) and maximum junction temperature of 150°C allow safe operation within this range under typical PCB copper pour conditions. Always verify board-level thermal design when operating near upper limits.
Does the TL712CPWE4 require external hysteresis components?
No, the TL712CPWE4 integrates 5 mV typical hysteresis internally, eliminating the need for external resistors. This feature is implemented via internal feedback and is specified across the full common-mode input range (0 V to 5.5 V). Unlike comparators requiring external hysteresis networks, the TL712CPWE4 delivers consistent noise immunity without additional passive components-reducing layout complexity and improving reliability in disk read applications.
How does the output enable (OE) pin function on the TL712CPWE4?
The OE pin on the TL712CPWE4 is an active-low control that places both OUT+ and OUT− outputs into high-impedance state when driven low. When OE is high, the comparator operates normally with complementary TTL-compatible outputs. This 3-state capability enables multiplexed bus architectures-such as shared data lanes in disk controller ASIC interfaces-where multiple comparators drive the same net without contention. OE timing is fully compatible with standard TTL logic families.
Can the TL712CPWE4 operate from a 3.3-V supply?
No, the TL712CPWE4 is not specified for 3.3-V operation. Its recommended supply range is 4.75 V to 5.25 V, and absolute maximum rating is 7 V. Operation below 4.75 V may result in degraded propagation delay, reduced output drive strength, or failure to meet hysteresis and common-mode specifications. For 3.3-V systems, consider modern alternatives like TLV3501 or LTC6702, which are explicitly characterized at lower voltages.
What is the significance of the "E4" suffix in TL712CPWE4?
The "E4" suffix in TL712CPWE4 denotes Texas Instruments' green packaging standard: lead-free (Pb-free), RoHS-compliant construction with NiPdAu (NIPDAU) lead finish and moisture sensitivity level (MSL) 1 rating for unlimited floor life at ≤30°C/60% RH. It confirms the device meets JEDEC J-STD-020D reflow profile requirements and replaces older leaded versions (e.g., TL712CPW) in new designs requiring environmental compliance.
TL712CPWE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-TSSOP (0.173", 4.40mm 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-TSSOP
TL712CPWE4 FAQ
1.How can I place an order for TL712CPWE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TL712CPWE4 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 TL712CPWE4 reliable?
The price and inventory of TL712CPWE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL712CPWE4 is usually 5 days.
3.What payment methods are accepted for TL712CPWE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL712CPWE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL712CPWE4?
TL712CPWE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL712CPWE4 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 TL712CPWE4?
For technical support, including TL712CPWE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL712CPWE4 requirements.
6.How does Aetrix verify that TL712CPWE4 is sourced from the original manufacturer or authorized distributors?
All TL712CPWE4 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 TL712CPWE4 meets industry standards.
7.What is the process for return or replacement of TL712CPWE4?
All TL712CPWE4 units undergo pre-shipment inspection (PSI). If there is an issue with TL712CPWE4, 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 TL712CPWE4 part is unused and in its original packaging.
Return procedure for TL712CPWE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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