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Texas Instruments TL712CPWG4
- Part No.:
- TL712CPWG4
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TL712CPWG4.pdf
- Description:
- IC COMPARATOR 1 DIFF 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,742
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Product details
Overview
TL712CPWG4 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 TL712CPWG4 datasheet, TL712CPWG4 pinout, TL712CPWG4 application, or TL712CPWG4 equivalent, this page delivers verified electrical specs, package mapping to TSSOP-8, functional role in level-sensitive threshold detection, and validated alternative options for legacy system redesigns.
Technical Context
The TL712CPWG4 implements self-biased differential input stages with 4 kΩ nominal differential input resistance and symmetrical switching characteristics. Its enable-controlled 3-state outputs support bus-sharing architectures without external logic.
Input common-mode range spans 0 V to 5.5 V under 5-V supply, and internal hysteresis of 5 mV typ suppresses noise-induced output oscillation near threshold crossings. Output drive capability includes 16 mA low-level sink current and 2.7 V minimum high-level voltage into −1 mA load.
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. |
| Propagation Delay | 25 ns typ (tPLH/tPHL) - enables reliable sampling of high-speed digital data streams up to ~20 MHz. |
| Hysteresis | 5 mV typ - provides noise immunity for clean transitions in noisy analog sensing environments. |
| Common-Mode Input Range | 0 V to 5.5 V - supports direct interfacing with unbuffered DAC outputs or resistor-divider sensor signals. |
| Output Type | Complementary 3-state TTL - allows wired-OR bus configurations and eliminates contention in shared-data-path designs. |
| Enable Function | Active-low OE pin - permits dynamic output disabling for power gating or time-multiplexed signal routing. |
| Input Threshold Spread | ±100 mV (VT+ and VT−) - defines precise decision window for differential signal discrimination. |
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 lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No internal connection | Unused pin; must remain unconnected per TI design guidance. |
| 2 (IN−) | Inverting analog input | Differential input node referenced to IN+; accepts 0–5.5 V common-mode signals. |
| 3 (IN+) | Non-inverting analog input | Primary reference input; threshold decision occurs when IN+ exceeds IN− by >5 mV. |
| 4 (OE) | Output enable (active low) | Drives both outputs to high-impedance state when logic high; enables bus arbitration. |
| 5 (VCC) | Positive supply | Single 5-V rail powers all internal circuitry and output drivers. |
| 6 (OUT−) | Inverted TTL output | Logic low when IN+ > IN−; complements OUT+ for differential signaling or latch interfaces. |
| 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 current and output sink 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 external tri-state logic or isolation buffers. |
| 5 mV typical hysteresis | Prevents chatter on slow-rising or noisy input edges-critical for reliable disk read-head signal slicing. |
| 25 ns propagation delay | Supports real-time comparison of high-frequency NRZ data patterns in legacy floppy and hard disk controllers. |
| 0 V to 5.5 V common-mode range | Accepts direct interface with unbuffered DACs, op-amp outputs, or resistor-ladder references without level-shifting. |
Applications
| Disk Memory Read Channel | Threshold Detection in Data Recovery |
|---|---|
Use Scenario: Converting analog magnetic read-head signals into clean digital NRZ data streams in 3.5″ and 5.25″ floppy disk controllers. IC Role / Device Role / Timing Role: High-speed comparator performing adaptive slicing of weak, noise-prone analog waveforms at data rates up to 250 kbps. Use Value: 25 ns response time and 5 mV hysteresis ensure jitter-free edge detection even with ±100 mV baseline drift across temperature. |
Use Scenario: Detecting valid logic transitions in legacy industrial encoder outputs where signal amplitude varies with cable length and EMI. IC Role / Device Role / Timing Role: Precision threshold discriminator converting variable-amplitude sine/cosine quadrature signals into square-wave A/B channels. Use Value: 0–5.5 V common-mode input range accommodates raw encoder outputs without external amplification or clamping diodes. |
| Bus Arbitration Interface | Legacy System Power-On Self-Test (POST) |
Use Scenario: Enabling/disabling shared address/data lines between multiple microcontrollers in modular instrumentation backplanes. IC Role / Device Role / Timing Role: Tri-state gate controller using OE pin to isolate subsystems during configuration or fault recovery sequences. Use Value: Complementary 3-state outputs eliminate need for discrete MOSFET switches or dedicated bus transceivers. |
Use Scenario: Validating RAM integrity during cold boot by comparing expected vs. actual memory read-back values in 8-bit embedded systems. IC Role / Device Role / Timing Role: Fast comparator verifying pass/fail status of parity or checksum comparisons before CPU initialization. Use Value: Single 5-V supply compatibility and TTL-compatible outputs integrate seamlessly with vintage 8085/8088-based POST firmware. |
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 115 ns delay. | Requires external hysteresis resistor network and pull-up; suited for high-voltage industrial sensors but not direct drop-in. | Select LM311DR only when adjustable hysteresis or higher supply voltage tolerance is required; board layout changes needed. |
| TL3016CDR | 30 ns delay, 3 mV hysteresis, rail-to-rail inputs, SOIC-8 package, same 5-V operation. | Higher precision input offset (±1 mV vs. ±100 mV), better for low-amplitude signal conditioning but lacks complementary outputs. | Choose TL3016CDR when improved DC accuracy is critical and complementary outputs are unnecessary; pinout differs (no OE). |
Compared with TL712CPWG4, LM311DR demands external components for basic functionality and adds latency, while TL3016CDR improves DC performance but removes bus-sharing capability-making TL712CPWG4 uniquely suited for legacy data-path slicing where timing, tri-state control, and simplicity are prioritized.
Availability
TL712CPWG4 is available at Aetrix Electronics and suitable for disk memory read channels, legacy industrial encoder interfaces, bus arbitration subsystems, and power-on self-test circuits requiring stable component supply across long-life product programs.
Supply support for TL712CPWG4 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 founded in 1930, specializing in analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
The TL712 family was designed specifically for high-reliability, high-speed analog-to-digital decision-making in legacy storage and control systems-emphasizing robustness, TTL compatibility, and minimal external component count.
FAQ
What is the operating temperature range for TL712CPWG4?
The TL712CPWG4 is rated for operation from 0°C to 70°C ambient temperature. This commercial-grade specification aligns with its intended use in non-automotive, non-military equipment such as desktop peripherals and industrial controllers. The device's thermal resistance (θJA = 149°C/W) and maximum junction temperature of 150°C allow safe operation within this range under typical PCB copper pour conditions. TL712CPWG4 maintains specified hysteresis and propagation delay across the full 0–70°C span.
Does TL712CPWG4 require external hysteresis components?
No, TL712CPWG4 integrates 5 mV typical hysteresis internally via its bipolar Schottky architecture, eliminating the need for external positive-feedback resistors. This built-in hysteresis stabilizes output transitions against noise near the decision threshold and is factory-trimmed-ensuring consistent behavior across units and temperature. TL712CPWG4's self-biased input stage further reduces external component dependency compared to op-amp-based comparators.
Can TL712CPWG4 be used with a 3.3-V supply?
No, TL712CPWG4 is specified only for 4.75 V to 5.25 V operation and is not guaranteed to function correctly at 3.3 V. Its bipolar Schottky process and TTL-compatible output stage require ≥4.75 V to meet VOL ≤ 0.5 V and VOH ≥ 2.7 V specifications. Attempting 3.3-V operation may result in degraded noise margin, increased propagation delay, or failure to drive downstream TTL inputs. For 3.3-V systems, consider modern rail-to-rail comparators like TLV3012.
What is the function of Pin 1 (NC) on TL712CPWG4?
Pin 1 of TL712CPWG4 is designated NC (No Connection) and has no internal bond wire or circuit connection. TI's datasheet explicitly states it must remain unconnected-neither grounded nor tied to VCC. Routing traces to or placing solder paste on Pin 1 risks mechanical stress on the die attach or contamination during assembly. TL712CPWG4's TSSOP-8 footprint follows JEDEC MO-153, and Pin 1 location is marked by a dimple or notch on the package body.
How does the OE (output enable) pin affect TL712CPWG4 outputs?
When OE is logic low (≤0.4 V), both OUT+ and OUT− enter high-impedance state, presenting >10 MΩ resistance to external circuits-enabling safe bus sharing. When OE is logic high (≥2.7 V), outputs resume normal TTL-compatible operation: OUT+ goes high when IN+ > IN−, and OUT− goes low simultaneously. TL712CPWG4's OE input draws only −360 µA at VIL, minimizing control-line loading. This feature is essential for multiplexed data paths in disk controller ASIC interfaces.
TL712CPWG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Series:
- -
- Packaging:
- Tray
- 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
TL712CPWG4 FAQ
1.How can I place an order for TL712CPWG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TL712CPWG4 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 TL712CPWG4 reliable?
The price and inventory of TL712CPWG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL712CPWG4 is usually 5 days.
3.What payment methods are accepted for TL712CPWG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL712CPWG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL712CPWG4?
TL712CPWG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL712CPWG4 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 TL712CPWG4?
For technical support, including TL712CPWG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL712CPWG4 requirements.
6.How does Aetrix verify that TL712CPWG4 is sourced from the original manufacturer or authorized distributors?
All TL712CPWG4 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 TL712CPWG4 meets industry standards.
7.What is the process for return or replacement of TL712CPWG4?
All TL712CPWG4 units undergo pre-shipment inspection (PSI). If there is an issue with TL712CPWG4, 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 TL712CPWG4 part is unused and in its original packaging.
Return procedure for TL712CPWG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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