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Texas Instruments SN74LVCZ245ADWR
- Part No.:
- SN74LVCZ245ADWR
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74LVCZ245ADWR.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,651
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Product details
Overview
SN74LVCZ245ADWR from Texas Instruments is an octal bus transceiver with 3-state outputs, designed for asynchronous bidirectional data transfer between 3.3-V and 5-V buses. It operates from 2.7 V to 3.6 V, accepts 5.5-V-tolerant inputs, delivers 6.3 ns max propagation delay at 3.3 V, and supports hot insertion via Ioff and power-up 3-state logic-used in mixed-voltage industrial control backplanes and FPGA-to-ASIC interface bridges.
For engineers reviewing the SN74LVCZ245ADWR datasheet, SN74LVCZ245ADWR pinout, SN74LVCZ245ADWR application, or SN74LVCZ245ADWR equivalent, key selection criteria include 5-V input tolerance, 3.3-V VCC compatibility, direction-control (DIR) and output-enable (OE) logic behavior, thermal performance in SOIC-DW package, and latch-up immunity per JESD78 Class II.
Technical Context
The SN74LVCZ245ADWR implements dual-bus bidirectional translation using a single DIR input to select A→B or B→A data flow, while OE independently places all outputs in high-impedance state. Its Ioff circuitry blocks current backflow during power-down, and power-up 3-state ensures isolation when VCC is below 1.5 V.
It supports mixed-mode signaling: 5-V inputs are safely accepted with 3.3-V VCC, enabling level-shifting without external resistors. Electrical characteristics are fully specified across –40°C to 85°C, with VOH ≥2.2 V and VOL ≤0.55 V under 24-mA load at 3 V, and Cio = 6 pF per port at 3.3 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7 V to 3.6 V - defines valid supply window for guaranteed operation and 5-V input tolerance |
| Max Propagation Delay | 6.3 ns at 3.3 V - determines maximum achievable data rate in synchronous bus systems |
| Input Voltage Tolerance | 0 V to 5.5 V - enables direct connection to legacy 5-V logic without level-shifters |
| Ioff Current | ±5 µA at VI/VO = 5.5 V - prevents damaging back-current during hot-swap or partial-power-down |
| Latch-Up Immunity | >100 mA per JESD78 Class II - ensures robustness against transient-induced parasitic thyristor activation |
| Output Drive Strength | ±24 mA at 3 V - supports driving 50-Ω transmission lines or multiple CMOS loads |
| Power Dissipation Capacitance | 42 pF (enabled), 3 pF (disabled) - directly impacts dynamic power consumption at 10 MHz switching |
Pinout & Package
SN74LVCZ245ADWR uses a 20-pin SOIC (DW) package measuring 7.5 mm × 13.3 mm × 2.65 mm, with standard 1.27-mm lead pitch and RoHS-compliant NiPdAu finish. Thermal resistance θJA is 58°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DIR) | Direction Control Input | Low = B-to-A data flow; High = A-to-B data flow - determines real-time bus directionality |
| 2–9 (A1–A8) | Port A Data Inputs/Outputs | Bidirectional I/O pins connected to one bus segment; 5-V tolerant when VCC = 3.3 V |
| 10 (GND) | Ground Reference | Primary return path for all internal logic and output currents; must be low-impedance |
| 11 (VCC) | Supply Voltage | 2.7–3.6 V power rail; powers internal logic and output drivers; decoupling required near pin |
| 12 (OE) | Output Enable Input | Low = outputs active; High = all outputs forced high-impedance - enables bus isolation |
| 13–20 (B1–B8) | Port B Data Inputs/Outputs | Bidirectional I/O pins connected to second bus segment; identical electrical specs to Port A |
Key Features
| Feature | Design Value |
|---|---|
| 5-V Input Tolerance | Supports direct interfacing with 5-V microcontrollers or legacy peripherals without external voltage translators |
| Hot-Insertion Support | Ioff and power-up 3-state prevent bus contention and backfeed damage during live board replacement |
| Mixed-Mode Signal Operation | Enables seamless communication between 3.3-V FPGAs and 5-V sensors or DACs in same system |
| Low Ground Bounce | VOLP < 0.8 V at 3.3 V ensures signal integrity during simultaneous output switching |
| JESD78 Class II Latch-Up | Guarantees survival under worst-case ESD or surge events in industrial environments |
Applications
| Industrial PLC Backplane Interface | FPGA-to-Microcontroller Bridge |
|---|---|
Use Scenario: Connecting 3.3-V FPGA I/O banks to 5-V analog front-end modules in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional level-translating bus transceiver managing data flow between voltage domains with sub-7-ns timing budget. Use Value: Eliminates discrete resistor-based level shifters, reduces BOM count, and maintains signal fidelity across 20-MHz control bus rates. | Use Scenario: Interfacing a 3.3-V Xilinx Artix-7 FPGA to a 5-V ARM Cortex-M7 microcontroller in embedded vision processing units. IC Role / Device Role / Timing Role: Octal-directional data conduit synchronized by shared clock and DIR/OE control signals. Use Value: Enables deterministic read/write handshaking with <6.3 ns skew, supporting real-time image buffer transfers. |
| Automotive Body Control Module | Test Equipment Digital I/O Card |
Use Scenario: Isolating 3.3-V MCU subsystems from 5-V CAN transceiver and LIN bus interfaces in body electronics ECUs. IC Role / Device Role / Timing Role: Voltage-domain firewall with hot-swap capability during module firmware updates. Use Value: Prevents bus lockup during power cycling; meets automotive AEC-Q100 stress requirements via JESD78 Class II rating. | Use Scenario: Configurable digital stimulus/response channel on automated test equipment I/O cards handling both 3.3-V and 5-V DUTs. IC Role / Device Role / Timing Role: Reconfigurable bus translator controlled via FPGA GPIO for per-pin voltage domain assignment. Use Value: Reduces need for multiple fixed-voltage I/O modules; supports mixed-voltage device validation in single test fixture. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC245A | No Z-series ground bounce/undershoot suppression; higher VOLP/VOHV (typ. 1.2 V / 1.5 V vs. <0.8 V / >2 V) | Lacks optimized noise margins for high-speed mixed-voltage routing; less suitable for dense PCB layouts | Choose SN74LVCZ245ADWR where simultaneous switching noise must be minimized |
| 74AVC16245 | 16-bit, dual-supply (1.2–3.6 V), no 5-V input tolerance; requires external biasing for 5-V interface | Designed for ultra-low-voltage core logic; not drop-in compatible for 5-V legacy integration | Choose SN74LVCZ245ADWR when backward compatibility with 5-V peripherals is mandatory |
Compared with SN74LVC245A, SN74LVCZ245ADWR delivers superior noise immunity and cleaner edges; compared with 74AVC16245, it provides native 5-V input support without auxiliary circuitry-making SN74LVCZ245ADWR optimal for retrofitting 3.3-V systems into existing 5-V infrastructure.
Availability
SN74LVCZ245ADWR is available at Aetrix Electronics and suitable for industrial automation backplanes, FPGA interface bridges, automotive body control modules, and test equipment digital I/O cards requiring stable component supply and long-term production continuity.
Supply support for SN74LVCZ245ADWR 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 connectivity technologies with over 50 years of innovation in industrial, automotive, and communications markets.
The SN74LVCZ245ADWR belongs to TI's LVCZ logic family, engineered specifically for robust mixed-voltage system interfacing with enhanced noise suppression and hot-swap reliability in harsh operating environments.
FAQ
What is the maximum operating temperature range for the SN74LVCZ245ADWR?
The SN74LVCZ245ADWR is rated for operation from –40°C to +85°C, as confirmed in the recommended operating conditions table. This range applies to all electrical and switching specifications, including propagation delay, drive strength, and 5-V input tolerance. The SOIC-DW package's θJA of 58°C/W supports thermal design within this envelope under typical PCB copper pour conditions.
Does the SN74LVCZ245ADWR require external pull-up resistors on OE or DIR?
The SN74LVCZ245ADWR does not require external pull-ups on DIR, but OE should be tied to VCC through a pullup resistor when VCC exceeds 1.5 V to guarantee high-impedance state-minimum value determined by driver sink capability. This requirement is explicitly stated in the datasheet to ensure reliable bus isolation during power transitions.
Can the SN74LVCZ245ADWR be used with a 2.5-V supply?
No-the SN74LVCZ245ADWR is specified only for 2.7 V to 3.6 V VCC operation. At 2.5 V, parameters including VOH, VOL, tpd, and 5-V input tolerance are not guaranteed. For 2.5-V systems, TI recommends alternatives such as SN74AVC245 or SN74LVC245A with adjusted VCC constraints.
How does the SN74LVCZ245ADWR handle simultaneous switching noise?
The SN74LVCZ245ADWR incorporates proprietary Z-series circuitry that limits typical output ground bounce (VOLP) to <0.8 V and output undershoot (VOHV) to >2 V at 3.3 V and 25°C. This is achieved via optimized output stage design and internal compensation-directly reducing crosstalk and false triggering in high-density digital systems.
Is the SN74LVCZ245ADWR pin-compatible with SN74LVC245ADWR?
Yes-SN74LVCZ245ADWR and SN74LVC245ADWR share identical SOIC-DW packaging, pin count (20), pinout, and mechanical footprint. However, they differ electrically: SN74LVCZ245ADWR adds Z-series noise suppression and tighter VOLP/VOHV specs, while SN74LVC245ADWR lacks these enhancements. No PCB changes are required for substitution, but system-level noise testing is advised.
SN74LVCZ245ADWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVCZ
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Transceiver, Non-Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- 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-SOIC
SN74LVCZ245ADWR FAQ
1.How can I place an order for SN74LVCZ245ADWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVCZ245ADWR 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 SN74LVCZ245ADWR reliable?
The price and inventory of SN74LVCZ245ADWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVCZ245ADWR is usually 5 days.
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Once your SN74LVCZ245ADWR 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 SN74LVCZ245ADWR?
For technical support, including SN74LVCZ245ADWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVCZ245ADWR requirements.
6.How does Aetrix verify that SN74LVCZ245ADWR is sourced from the original manufacturer or authorized distributors?
All SN74LVCZ245ADWR 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 SN74LVCZ245ADWR meets industry standards.
7.What is the process for return or replacement of SN74LVCZ245ADWR?
All SN74LVCZ245ADWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVCZ245ADWR, 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 SN74LVCZ245ADWR part is unused and in its original packaging.
Return procedure for SN74LVCZ245ADWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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