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Texas Instruments SN74LVCZ240ANSR
- Part No.:
- SN74LVCZ240ANSR
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
SN74LVCZ240ANSR.pdf
- Description:
- IC BUFFER INVERT 3.6V 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,027
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Product details
Overview
SN74LVCZ240ANSR from Texas Instruments is an octal buffer with power-up 3-state outputs, configured as two independent 4-channel banks each controlled by dedicated active-low output enable pins. It operates from 2.7V to 3.6V, accepts 5.5V-tolerant inputs, delivers 6.5ns max propagation delay at 3.3V, and supports hot insertion via Ioff and power-up 3-state functionality - used in mixed-voltage bus interfacing and signal conditioning on industrial control backplanes.
For engineers reviewing the SN74LVCZ240ANSR datasheet, SN74LVCZ240ANSR pinout, SN74LVCZ240ANSR application, or SN74LVCZ240ANSR equivalent, key selection criteria include its dual-bank 3-state control, 5.5V input tolerance with 3.3V VCC, ground bounce < 0.8V, VOH undershoot > 2V, and JESD78 latch-up immunity exceeding 100mA.
Technical Context
The SN74LVCZ240ANSR implements eight CMOS inverters with Schmitt-trigger inputs and balanced 3-state outputs, partitioned into two functionally isolated banks (Bank 1: A1–A4/Y1–Y4; Bank 2: A5–A8/Y5–Y8). Each bank features independent OE control, enabling selective bus isolation without affecting the other bank's signal path.
Its Ioff protection disables all outputs when VCC = 0V, preventing back-driving during partial power-down. Input voltage tolerance up to 5.5V allows direct interfacing with 5V logic while powered from 3.3V, eliminating external level shifters in mixed-mode systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7V to 3.6V - defines valid supply window for guaranteed logic operation and timing compliance |
| Input Voltage Tolerance | Up to 5.5V - enables direct connection to 5V sources without clamping diodes or external protection |
| Max Propagation Delay | 6.5ns at 3.3V - ensures sub-7ns signal path latency for high-speed digital control and data routing |
| Output Drive Strength | ±24mA at 3V - supports driving moderate capacitive loads (≤50pF) and resistive terminations per channel |
| Ground Bounce (VOLP) | < 0.8V at VCC = 3.3V - minimizes noise coupling into shared ground planes during simultaneous switching |
| Latch-up Immunity | > 100mA per JESD78 - guarantees robustness against transient current faults in industrial environments |
| Ioff Current | ±5μA at VI/VO = 5.5V - prevents leakage-induced bus contention during power sequencing or hot-swap events |
Pinout & Package
TSSOP-20 (PW) package: 6.5mm × 6.4mm body with 20-pin surface-mount footprint, optimized for high-density PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 19OE | Active-low bank enable inputs | Control 4-channel output states independently; low = enabled, high = high-impedance |
| 1A1–1A4, 2A1–2A4 | Buffer input terminals | Accept 5.5V-tolerant signals; drive corresponding Y outputs with inverting logic (xYn = xAn) |
| 1Y1–1Y4, 2Y1–2Y4 | Inverting buffer outputs | Provide 3-state push-pull drive; sink/source ±24mA; exhibit VOLP < 0.8V and VOHV > 2V |
| 10GND, 20VCC | Power supply terminals | Single-supply operation; requires local 0.1μF bypass capacitor at VCC pin per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Power-up 3-state | Outputs remain high-impedance until VCC stabilizes - prevents bus contention during system boot |
| Mixed-mode signal operation | 5V inputs safely interface with 3.3V VCC - eliminates discrete level shifters in heterogeneous logic systems |
| Hot-insertion support | Ioff limits leakage to ±5μA when VCC = 0V - enables safe card replacement in live backplanes |
| Low ground bounce | VOLP < 0.8V at 3.3V - reduces noise injection into shared ground networks during multi-bit switching |
| High noise immunity | Schmitt-trigger inputs reject slow-rising or noisy signals - improves reliability in electrically harsh environments |
Applications
| Industrial Backplane Interface | Multi-Voltage Bus Isolation |
|---|---|
Use Scenario: Interfacing 5V sensor modules to a 3.3V microcontroller-based PLC rack via shared parallel bus. IC Role / Device Role / Timing Role: Octal buffer providing level-shifted, direction-controlled signal transmission between voltage domains with bank-selectable 3-state control. Use Value: Eliminates need for eight discrete level shifters; dual OE pins allow dynamic segmentation of bus traffic without software overhead. |
Use Scenario: Isolating legacy 5V peripheral control lines from a modern 3.3V FPGA I/O bank during firmware updates. IC Role / Device Role / Timing Role: Dual-bank buffer acting as configurable gatekeeper - one bank holds steady while the other transitions under OE control. Use Value: Enables glitch-free reconfiguration of control buses; Ioff prevents backfeed during partial power cycling of subsystems. |
| LED Driver Interface | Signal Integrity Enhancement |
Use Scenario: Driving 8-channel LED status indicators from a low-current 3.3V MCU GPIO port. IC Role / Device Role / Timing Role: Current-boosting inverting buffer with 24mA per channel drive capability and 5.5V-tolerant inputs. Use Value: Directly drives common-anode LEDs without external transistors; Schmitt inputs suppress switch contact bounce artifacts. |
Use Scenario: Improving edge fidelity on 12cm+ PCB traces connecting FPGA to ADC in test equipment. IC Role / Device Role / Timing Role: Low-skew buffer with 6.5ns tpd and controlled output impedance - used with series damping resistors per TI layout guidance. Use Value: Reduces ringing and overshoot observed at receiver end; VOLP < 0.8V maintains clean ground reference during fast transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC240APWR | Same functional spec, but PW package lacks NS/DW variants; identical pinout and electrical behavior | No difference - direct form-fit-function replacement in TSSOP-20 layouts | Select when board uses TSSOP-20 footprint and requires TI's standard LVC240 variant without Z-series enhancements |
| 74LVC240AD,212 | NXP variant with same 2.7–3.6V range and 5.5V input tolerance; slightly higher max tpd (7.5ns @ 3.3V) | Compatible in non-critical timing paths; lower latch-up rating (70mA vs 100mA) | Choose for cost-sensitive industrial designs where 1ns timing margin is acceptable and JESD78 rating is not mission-critical |
Compared with SN74LVCZ240ANSR, SN74LVC240APWR offers identical performance in the same package, while 74LVC240AD,212 trades minor timing and latch-up margin for broader distributor availability - both serve as viable alternatives when exact Z-series characteristics like enhanced ground bounce suppression are not required.
Availability
SN74LVCZ240ANSR is available at Aetrix Electronics and suitable for industrial automation interfaces, mixed-voltage embedded controllers, and signal integrity-critical PCB interconnects requiring stable component supply across extended production cycles.
Supply support for SN74LVCZ240ANSR 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 logic solutions for industrial, automotive, and communications markets.
The SN74LVCZ240ANSR belongs to TI's LVCZ advanced logic family, engineered specifically for robust mixed-voltage system interfacing with emphasis on hot-swap safety, noise resilience, and precise timing control in real-time control applications.
FAQ
What is the maximum input voltage the SN74LVCZ240ANSR can tolerate?
The SN74LVCZ240ANSR accepts input voltages up to 5.5V regardless of VCC level, enabling direct interfacing with 5V logic families while operating from a 3.3V supply. This overvoltage tolerance is maintained across the full operating temperature range (–40°C to 85°C) and does not require external clamping circuitry.
Does the SN74LVCZ240ANSR support hot insertion?
Yes, the SN74LVCZ240ANSR supports hot insertion through two integrated features: Ioff protection disables all outputs when VCC = 0V, limiting leakage to ±5μA, and power-up 3-state ensures outputs remain high-impedance until VCC reaches valid operating range - preventing bus contention during live card replacement.
What is the propagation delay of the SN74LVCZ240ANSR at 3.3V?
The SN74LVCZ240ANSR has a maximum propagation delay (tpd) of 6.5ns at VCC = 3.3V, measured under standard load conditions. Typical values are lower, and this specification applies across the full recommended operating temperature range (–40°C to 85°C), ensuring consistent timing in demanding control applications.
How does the SN74LVCZ240ANSR handle ground bounce?
The SN74LVCZ240ANSR specifies typical output ground bounce (VOLP) below 0.8V at VCC = 3.3V and TA = 25°C. This low ground bounce is achieved through optimized output stage design and helps maintain signal integrity in multi-bit parallel interfaces where simultaneous switching could otherwise corrupt shared ground references.
What package type is used for the SN74LVCZ240ANSR?
The SN74LVCZ240ANSR is supplied in a TSSOP-20 (PW) package measuring 6.5mm × 6.4mm including pins, with a 6.5mm × 4.4mm body size. This fine-pitch surface-mount package supports high-density PCB layouts and is compatible with standard automated assembly processes.
SN74LVCZ240ANSR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVCZ
- Package/Case:
- 20-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Buffer, Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 4
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SO
SN74LVCZ240ANSR FAQ
1.How can I place an order for SN74LVCZ240ANSR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVCZ240ANSR 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 SN74LVCZ240ANSR reliable?
The price and inventory of SN74LVCZ240ANSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVCZ240ANSR is usually 5 days.
3.What payment methods are accepted for SN74LVCZ240ANSR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVCZ240ANSR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVCZ240ANSR?
SN74LVCZ240ANSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVCZ240ANSR 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 SN74LVCZ240ANSR?
For technical support, including SN74LVCZ240ANSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVCZ240ANSR requirements.
6.How does Aetrix verify that SN74LVCZ240ANSR is sourced from the original manufacturer or authorized distributors?
All SN74LVCZ240ANSR 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 SN74LVCZ240ANSR meets industry standards.
7.What is the process for return or replacement of SN74LVCZ240ANSR?
All SN74LVCZ240ANSR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVCZ240ANSR, 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 SN74LVCZ240ANSR part is unused and in its original packaging.
Return procedure for SN74LVCZ240ANSR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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