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Texas Instruments SN74LVCZ240ADBR
- Part No.:
- SN74LVCZ240ADBR
- Manufacturer:
- Texas Instruments
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
SN74LVCZ240ADBR.pdf
- Description:
- IC BUFFER INVERT 3.6V 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,317
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Product details
Overview
SN74LVCZ240ADBR from Texas Instruments is an octal buffer/driver with 3-state outputs, designed for memory address and clock bus driving in 2.7-V to 3.6-V systems. It features dual 4-bit channels, independent output-enable (1OE/2OE) control, 6.5 ns max propagation delay at 3.3 V, 5.5-V-tolerant inputs, and Ioff hot-insertion support.
For engineers reviewing the SN74LVCZ240ADBR datasheet, SN74LVCZ240ADBR pinout, SN74LVCZ240ADBR application, or SN74LVCZ240ADBR equivalent, key selection criteria include mixed-voltage translation capability (5-V input / 3.3-V VCC), power-up 3-state behavior, ground bounce (VOLP < 0.8 V) and undershoot (VOHV > 2 V) performance, and SSOP-20 thermal characteristics (θJA = 92°C/W).
Technical Context
This device implements two independent 4-bit non-inverting buffers, each with dedicated active-low output-enable inputs (1OE, 2OE). When OE is low, A→Y data passes transparently; when high, outputs enter high-impedance state - enabling bidirectional bus sharing without contention.
Its Ioff circuitry disables outputs during power-down (VCC = 0–1.5 V), preventing backflow current, while power-up 3-state ensures outputs remain Hi-Z until VCC exceeds 1.5 V. Input tolerance up to 5.5 V allows direct interfacing with legacy 5-V logic in mixed-mode systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7 V to 3.6 V - defines valid supply window for guaranteed logic operation and timing compliance |
| Input Voltage Tolerance | Up to 5.5 V - enables safe connection to 5-V drivers without level-shifting circuitry |
| Max Propagation Delay | 6.5 ns at VCC = 3.3 V - supports ≥150 MHz bus toggle rates in high-speed address/data paths |
| Output Drive Strength | ±24 mA at VCC = 3 V - sufficient to drive 50-Ω transmission lines or multiple CMOS loads |
| Power-Up 3-State | Active below 1.5 V VCC - eliminates bus conflicts during power sequencing in hot-plug systems |
| Ioff Current | ±5 µA at VI/VO = 5.5 V - blocks damaging back-current when powered down in live backplanes |
| ESD Rating | 2000-V HBM, 200-V MM, 1000-V CDM - meets industrial-grade robustness requirements per JESD22 |
Pinout & Package
SN74LVCZ240ADBR is housed in a 20-pin SSOP (Shrink Small Outline Package) with 0.65-mm lead pitch, 7.2-mm body width, and 92°C/W junction-to-ambient thermal resistance - optimized for space-constrained PCB layouts requiring moderate power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE | Active-low enable for Y1–Y4 outputs | Drives first 4-bit channel; must be low for A1–A4 → Y1–Y4 pass-through |
| 2OE | Active-low enable for Y1–Y4 outputs | Drives second 4-bit channel; independent control enables staggered bus access |
| 1A1–1A4 | Inputs for first buffer group | Accept 5.5-V-tolerant signals; connect to address/data lines driven by 3.3-V or 5-V sources |
| 2A1–2A4 | Inputs for second buffer group | Electrically isolated from first group; supports dual-bus or mirrored signal routing |
| 1Y1–1Y4 | Outputs for first buffer group | 3-state capable; high-impedance when 1OE = high - essential for shared bus arbitration |
| 2Y1–2Y4 | Outputs for second buffer group | Independent 3-state control allows time-multiplexed or parallel bus expansion |
| VCC | Positive supply | Must be 2.7–3.6 V; powers internal logic and output drivers; decoupling required near pin |
| GND | Ground reference | Return path for all I/O and supply currents; low-inductance connection critical for noise control |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode voltage translation | 5-V-tolerant inputs with 3.3-V VCC enable direct interface between legacy 5-V peripherals and modern 3.3-V controllers |
| Hot-insertion support | Ioff + power-up 3-state eliminate backfeed and bus contention during live board insertion into powered backplanes |
| Low ground bounce | Typical VOLP < 0.8 V at 3.3 V ensures stable low-level signaling under fast switching, reducing false triggering |
| Controlled undershoot | Typical VOHV > 2 V prevents unintended logic-low detection during output transitions in noisy environments |
| High noise immunity | VIL = 0.8 V / VIH = 2.0 V at VCC = 2.7–3.6 V provides ≥0.6 V noise margin against EMI-induced glitches |
Applications
| Memory Address Buffering | PCI/ISA Bus Transceiver Interface |
|---|---|
Use Scenario: Driving 32-bit address buses from low-voltage microcontrollers to legacy SRAM or Flash devices operating at 5 V. IC Role / Device Role / Timing Role: Non-inverting octal buffer with independent 3-state control isolates controller from bus loading and enables multi-master arbitration. Use Value: Eliminates need for discrete level shifters; 6.5 ns tpd maintains setup/hold timing margins across full address range. |
Use Scenario: Interfacing 3.3-V FPGA-based PCI core logic to 5-V PCI slot signaling standards. IC Role / Device Role / Timing Role: Voltage-tolerant bus driver providing bidirectional data path isolation and hot-swap-safe enable control. Use Value: Ioff prevents back-current damage during card insertion; 5.5-V input tolerance satisfies PCI specification VIH(min) requirements. |
| Industrial PLC I/O Expansion | Automotive Body Control Module |
Use Scenario: Expanding digital I/O count on ARM Cortex-M based PLC CPU boards interfacing with 24-V sensor/actuator modules via optocoupled inputs. IC Role / Device Role / Timing Role: Level-translating buffer isolating MCU GPIOs from higher-voltage field-side logic while maintaining timing integrity. Use Value: ±24 mA drive strength supports direct connection to optocoupler LEDs; latch-up immunity (>100 mA) withstands industrial transients. |
Use Scenario: Signal conditioning between 3.3-V automotive microcontroller and 5-V CAN transceiver or LIN bus peripherals. IC Role / Device Role / Timing Role: Robust interface buffer ensuring signal integrity across mixed-supply domains in harsh EMI environments. Use Value: ESD ratings (2000-V HBM) exceed ISO 10605 requirements; VOLP/VOHV specs reduce susceptibility to conducted noise on vehicle harnesses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer/driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC240APWR | TSSOP-20 package (83°C/W θJA); identical electrical specs and pinout | Better thermal performance than SSOP for high-density layouts; same footprint compatibility but different land pattern | Select when board layout requires lower thermal resistance and TSSOP reflow profile is established |
| SN74LVCH240APW | Includes bus-hold circuitry on all inputs; otherwise matches SN74LVCZ240ADBR functionality | Eliminates external pull-up/pull-down resistors on unused or floating inputs - reduces BOM count in sparse bus designs | Choose when input stability without external biasing is required, especially in low-power sleep modes |
Compared with SN74LVCZ240ADBR, SN74LVC240APWR offers improved thermal dissipation in TSSOP, while SN74LVCH240APW adds bus-hold inputs for enhanced noise immunity on unterminated lines - both retain pin-for-pin compatibility but serve distinct layout and reliability priorities.
Availability
SN74LVCZ240ADBR is available at Aetrix Electronics and suitable for memory subsystems, industrial bus interfaces, automotive control modules, and FPGA I/O expansion requiring stable component supply and long-term manufacturability.
Supply support for SN74LVCZ240ADBR 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 for industrial, automotive, and communications markets.
The SN74LVCZ240ADBR belongs to TI's LVC logic family - engineered for high-speed, low-voltage operation with mixed-signal compatibility and robust system-level integration in space- and power-constrained applications.
FAQ
What is the maximum input voltage rating for SN74LVCZ240ADBR?
The SN74LVCZ240ADBR supports input voltages up to 5.5 V regardless of VCC level - a key feature enabling direct interfacing with 5-V logic families while operating from a 3.3-V supply. This specification is verified across the full operating temperature range (–40°C to 85°C) and is not dependent on output loading or transition rate.
Does SN74LVCZ240ADBR support hot-plug operation?
Yes, SN74LVCZ240ADBR supports hot-plug operation via integrated Ioff and power-up 3-state circuitry. When VCC is below 1.5 V, outputs are forced high-impedance, and Ioff limits reverse current to ±5 µA - preventing damage or bus corruption during live insertion into powered backplanes or carrier cards.
What is the propagation delay of SN74LVCZ240ADBR at 3.3 V?
The maximum propagation delay (tpd) of SN74LVCZ240ADBR is 6.5 ns at VCC = 3.3 V, TA = 25°C, with CL = 30 pF. This value applies to both A→Y and Y→A directions under standard load conditions and ensures timing compliance in high-speed address and clock distribution networks.
Can SN74LVCZ240ADBR drive 50-Ω transmission lines directly?
Yes, SN74LVCZ240ADBR can drive 50-Ω transmission lines directly: its output drive strength reaches ±24 mA at VCC = 3 V, sufficient to source/sink full swing into 50-Ω loads. For optimal signal integrity, maintain controlled impedance routing and place series termination resistors close to the driver output if reflections are observed.
What package type is used for SN74LVCZ240ADBR?
SN74LVCZ240ADBR uses a 20-pin SSOP (Shrink Small Outline Package) with 0.65-mm lead pitch and JEDEC MO-153 compliant outline. Its top-side marking is "CV240A", and it has a thermal resistance of θJA = 92°C/W - making it suitable for compact industrial and automotive PCBs where thermal headroom is constrained.
SN74LVCZ240ADBR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVCZ
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-SSOP
SN74LVCZ240ADBR FAQ
1.How can I place an order for SN74LVCZ240ADBR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVCZ240ADBR 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 SN74LVCZ240ADBR reliable?
The price and inventory of SN74LVCZ240ADBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVCZ240ADBR is usually 5 days.
3.What payment methods are accepted for SN74LVCZ240ADBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVCZ240ADBR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVCZ240ADBR?
SN74LVCZ240ADBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVCZ240ADBR 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 SN74LVCZ240ADBR?
For technical support, including SN74LVCZ240ADBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVCZ240ADBR requirements.
6.How does Aetrix verify that SN74LVCZ240ADBR is sourced from the original manufacturer or authorized distributors?
All SN74LVCZ240ADBR 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 SN74LVCZ240ADBR meets industry standards.
7.What is the process for return or replacement of SN74LVCZ240ADBR?
All SN74LVCZ240ADBR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVCZ240ADBR, 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 SN74LVCZ240ADBR part is unused and in its original packaging.
Return procedure for SN74LVCZ240ADBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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