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Texas Instruments TL712CPSR
- Part No.:
- TL712CPSR
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
TL712CPSR.pdf
- Description:
- IC COMPARATOR 1 DIFF 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,029
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Product details
Overview
TL712CPSR 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 digital storage systems.
For engineers reviewing the TL712CPSR datasheet, TL712CPSR pinout, TL712CPSR application, or TL712CPSR equivalent, key selection considerations include its 0 V to 5.5 V common-mode input range, self-biased inputs, enable-controlled 3-state outputs, and SO (PS) package compatibility with surface-mount production flow.
Technical Context
The TL712CPSR implements a fully differential input stage with internal biasing, eliminating external resistor networks. Its output stage delivers symmetrical switching characteristics and TTL-compatible voltage levels (VOH ≥ 2.7 V, VOL ≤ 0.5 V at IOL = 16 mA) under 5-V operation.
Enable logic is active-low: OE low places both OUT+ and OUT− into high-impedance state. The device features 4 kΩ differential input resistance and 100 Ω output resistance, supporting direct interface with TTL loads without external pull-ups.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.75 V to 5.25 V - ensures stable operation within standard TTL/CMOS 5-V rail tolerances |
| Propagation Delay | 25 ns typ - enables high-speed decision-making in disk read channels and real-time signal discrimination |
| Hysteresis | 5 mV typ - provides noise immunity for reliable threshold detection in noisy analog environments |
| Common-Mode Input Range | 0 V to 5.5 V - supports rail-to-rail input sensing without level-shifting circuitry |
| Output Type | Complementary 3-state TTL - allows wired-OR bus sharing and multiplexed output routing in multi-comparator systems |
| Input Bias | Self-biased - eliminates need for external bias resistors, reducing BOM count and layout area |
Pinout & Package
SOP (PS) package, 8-pin, 1.27 mm pitch, 5.3 mm × 6.2 mm body, 1.75 mm max height, RoHS-compliant NIPDAU lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No internal connection | Unused pad - must remain unconnected; no routing or thermal tie required |
| 2 (IN−) | Inverting input | Differential analog input node; referenced internally to self-bias point |
| 3 (IN+) | Non-inverting input | Differential analog input node; forms threshold comparison pair with IN− |
| 4 (OE) | Output enable (active-low) | Asserting low disables both outputs into high-Z; enables shared-bus topology |
| 5 (VCC) | Positive supply | Single 5-V power connection; decoupling capacitor required within 1 cm |
| 6 (OUT−) | Inverted logic output | Active-low TTL-compatible output; complements OUT+ state |
| 7 (OUT+) | Non-inverted logic output | Active-high TTL-compatible output; complements OUT− state |
| 8 (GND) | Ground reference | Return path for supply and output currents; requires low-inductance connection to plane |
Key Features
| Feature | Design Value |
|---|---|
| High-speed response | 25 ns propagation delay enables sub-40-MHz sampling decision rates in read-channel architectures |
| Self-biased input stage | Eliminates external bias network - reduces component count and improves temperature stability of threshold point |
| Complementary 3-state outputs | Supports multi-drop bus configurations and dynamic output arbitration without external logic gates |
| 5-mV hysteresis | Rejects up to ±2.5 mV of input noise without oscillation - critical for reliable edge detection in magnetic read heads |
| Single 5-V operation | Direct compatibility with legacy TTL/LSI logic families - no dual-supply design overhead |
Applications
| Disk Memory Read Channel | High-Speed Data Acquisition |
|---|---|
Use Scenario: Detecting flux transitions from magnetic read heads in floppy or hard disk controllers. IC Role / Device Role / Timing Role: Analog comparator converting differential head signals into clean digital edges for clock recovery and data slicing. Use Value: 25 ns response time and 5 mV hysteresis ensure accurate bit boundary detection amid channel noise and jitter. | Use Scenario: Real-time threshold triggering in oscilloscopes and logic analyzers capturing fast digital events. IC Role / Device Role / Timing Role: High-speed window comparator front-end generating precise trigger pulses synchronized to input overdrive. Use Value: Self-biased inputs and rail-to-rail common-mode range allow direct connection to probe amplifiers without AC coupling. |
| Industrial Position Sensing | TTL-Level Signal Conditioning |
Use Scenario: Converting analog outputs from LVDTs or resolvers into direction-encoded quadrature pulses. IC Role / Device Role / Timing Role: Differential comparator with hysteresis detecting zero-crossings and amplitude thresholds in feedback loops. Use Value: Complementary outputs drive quadrature decoder ICs directly; OE pin enables synchronized sampling across multiple axes. | Use Scenario: Level-shifting and noise-immune conversion of analog sensor outputs to TTL logic for microcontroller inputs. IC Role / Device Role / Timing Role: Interface comparator translating 0–5 V sensor ranges into robust 0/5 V logic states with built-in noise margin. Use Value: Single-supply operation and 0–5.5 V input range eliminate level-shifters; 3-state outputs support multiplexed ADC monitoring paths. |
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 3-state capability; 115 ns typical response; requires pull-up resistor | Lacks complementary outputs and enable control - unsuitable for bus-shared or low-power standby modes | Choose when cost sensitivity outweighs speed and output flexibility requirements |
| TL3016CDR | 2.5 ns propagation delay, 3.3-V/5-V dual-supply capable, no integrated hysteresis | Higher speed but requires external hysteresis network; not drop-in compatible due to different pinout and enable logic | Prefer for ultra-fast timing-critical designs where external hysteresis is acceptable and board space permits redesign |
Compared with LM311DR and TL3016CDR, the TL712CPSR uniquely combines 25 ns speed, self-biased inputs, complementary 3-state outputs, and integrated 5 mV hysteresis in an SOP-8 package-making it optimal for legacy 5-V disk controller upgrades and space-constrained industrial signal conditioning.
Availability
TL712CPSR is available at Aetrix Electronics and suitable for disk memory read chains, high-speed data acquisition systems, and industrial position sensing applications requiring stable component supply and long-term industrial lifecycle support.
Supply support for TL712CPSR 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 delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, longevity, and industrial-grade performance.
The TL712CPSR belongs to TI's legacy high-speed comparator product line, designed specifically for 5-V digital storage and real-time signal discrimination applications where speed, noise immunity, and bus-sharing capability are essential.
FAQ
What is the operating temperature range for TL712CPSR?
The TL712CPSR is rated for operation from 0°C to 70°C ambient temperature. This commercial-grade range aligns with its intended use in disk drive controllers and industrial equipment housed in temperature-controlled enclosures. The device's thermal impedance is 95°C/W (θJA), and maximum junction temperature is specified at 150°C - allowing safe operation under typical PCB power dissipation conditions when mounted with standard copper pour.
Does TL712CPSR require external biasing resistors on its inputs?
No, the TL712CPSR features a self-biased input stage, meaning no external resistors are needed to establish the common-mode operating point. This internal biasing simplifies schematic design, reduces component count, and improves thermal stability of the threshold voltage compared to externally biased comparators like the LM311. The input stage is optimized for 0 V to 5.5 V common-mode range under 5-V supply.
What does the NC pin (Pin 1) on TL712CPSR signify, and how should it be handled?
Pin 1 of the TL712CPSR is designated NC (No Connection) - it has no internal bond wire or circuit connection. It must remain unconnected on the PCB; neither routing nor thermal vias are permitted. This pin is included for mechanical symmetry and package compatibility but carries zero electrical function. Board layout guidelines confirm no solder mask opening or copper trace should contact Pin 1.
Can TL712CPSR drive standard TTL loads directly?
Yes, the TL712CPSR outputs are TTL-compatible: VOH ≥ 2.7 V at −1 mA and VOL ≤ 0.5 V at 16 mA, meeting standard TTL logic thresholds. Its complementary 3-state outputs can sink up to 16 mA and source ~1 mA, enabling direct connection to 74LS-series inputs without pull-up resistors. For heavier loads, verify total current per output stays within absolute maximum ratings (±50 mA).
Is TL712CPSR pin-compatible with other variants in the TL712 family?
Yes, all TL712 variants - including TL712CP (PDIP), TL712CD (SOIC), TL712CPSR (SOP), and TL712CPWR (TSSOP) - share identical 8-pin functional pinout and electrical behavior. The SOP (PS) package of TL712CPSR maintains the same pin assignments (IN−, IN+, OE, VCC, OUT−, OUT+, GND) as the SOIC and PDIP versions, enabling footprint interchangeability in layout with only land pattern adjustments for pitch and body size.
TL712CPSR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.209", 5.30mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- 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:
- Surface Mount
- :
- 8-SO
TL712CPSR FAQ
1.How can I place an order for TL712CPSR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL712CPSR 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 TL712CPSR reliable?
The price and inventory of TL712CPSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL712CPSR is usually 5 days.
3.What payment methods are accepted for TL712CPSR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL712CPSR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL712CPSR?
TL712CPSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL712CPSR 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 TL712CPSR?
For technical support, including TL712CPSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL712CPSR requirements.
6.How does Aetrix verify that TL712CPSR is sourced from the original manufacturer or authorized distributors?
All TL712CPSR 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 TL712CPSR meets industry standards.
7.What is the process for return or replacement of TL712CPSR?
All TL712CPSR units undergo pre-shipment inspection (PSI). If there is an issue with TL712CPSR, 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 TL712CPSR part is unused and in its original packaging.
Return procedure for TL712CPSR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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