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Texas Instruments SN74LVCZ245APWR
- Part No.:
- SN74LVCZ245APWR
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVCZ245APWR.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,072
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Product details
Overview
SN74LVCZ245APWR 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 system interconnects such as industrial PLC backplanes and FPGA I/O bridging.
For engineers reviewing the SN74LVCZ245APWR datasheet, SN74LVCZ245APWR pinout, SN74LVCZ245APWR application, or SN74LVCZ245APWR equivalent, key selection criteria include 5-V input tolerance, 20-pin TSSOP package compatibility, 3.3-V supply operation, hot-insertion support, and bidirectional direction control via DIR/OE signals.
Technical Context
The SN74LVCZ245APWR implements dual-bus bidirectional translation using a single DIR input to select data flow direction (A→B or B→A) and an active-low OE input to enable/disable all outputs into high-impedance state. Its Ioff circuitry blocks current backflow when powered down, while power-up 3-state ensures outputs remain high-Z during VCC ramp from 0 V to 1.5 V.
It supports mixed-mode signal operation: inputs tolerate up to 5.5 V regardless of VCC (2.7–3.6 V), enabling direct interfacing between legacy 5-V logic and modern 3.3-V systems without level-shifting components. Latch-up performance exceeds 100 mA per JESD 78 Class II.
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 output drive strength |
| Input Voltage Tolerance | Up to 5.5 V - allows direct connection to 5-V CMOS/TTL outputs without external clamping or translation |
| Max Propagation Delay | 6.3 ns at VCC = 3.3 V - enables reliable operation in high-speed digital backplane and memory interface timing budgets |
| Output Drive Strength | ±24 mA at VCC = 3 V - sufficient to drive 50-Ω transmission lines or multiple LVC loads under worst-case conditions |
| Ioff Current | ±5 µA at VI/VO = 5.5 V - prevents damaging back-current during hot-swap or partial-power-down scenarios |
| Power-Up 3-State | Active below 1.5 V VCC - eliminates bus contention during power sequencing in multi-rail systems |
| Operating Temperature | –40°C to +85°C - qualified for industrial ambient environments including factory automation and motor control cabinets |
Pinout & Package
TSSOP-20 (PW) package: 4.4 mm × 6.5 mm body, 0.65 mm lead pitch, 1.2 mm max height, exposed pad not present, RoHS-compliant NiPdAu finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DIR) | Direction Control Input | Low = B-to-A data transfer; High = A-to-B data transfer - determines real-time bus flow direction |
| 2–9 (A1–A8) | Port A Data Inputs/Outputs | Bidirectional I/O pins connected to one system bus (e.g., microcontroller side) |
| 10 (GND) | Ground Reference | Primary return path for all internal logic and output drivers - must be low-inductance connection |
| 11 (VCC) | Supply Voltage | 2.7–3.6 V power rail - powers internal logic and output stages; bypassing with 0.1 µF ceramic required |
| 12 (OE) | Output Enable Input | Active-low control: Low = outputs enabled; High = all outputs in high-impedance state - isolates buses |
| 13–20 (B1–B8) | Port B Data Inputs/Outputs | Bidirectional I/O pins connected to second system bus (e.g., peripheral or legacy 5-V side) |
Key Features
| Feature | Design Value |
|---|---|
| 5-V tolerant inputs | Accepts 0–5.5 V signals at any A/B port while VCC = 2.7–3.6 V - eliminates need for discrete level shifters |
| Hot-insertion support | Guaranteed Ioff and power-up 3-state behavior per JEDEC standards - enables safe live board replacement in modular systems |
| Mixed-mode operation | Simultaneous 3.3-V VCC and 5-V signal levels on same device - simplifies voltage-domain bridging in heterogeneous designs |
| Low ground bounce (VOLP) | <0.8 V typical at VCC = 3.3 V - reduces noise coupling into adjacent sensitive analog or clock circuits |
| High noise immunity | VIL = 0.8 V, VIH = 2.0 V at VCC = 2.7–3.6 V - provides ≥0.7 V noise margin against EMI in industrial environments |
Applications
| Industrial Backplane Interconnect | FPGA I/O Expansion Bridge |
|---|---|
Use Scenario: Connecting a 3.3-V FPGA I/O bank to legacy 5-V sensor modules or actuator controllers across a shared PCB backplane. IC Role / Device Role / Timing Role: Bidirectional voltage-translating bus transceiver managing real-time command/response traffic between domains. Use Value: Eliminates discrete level-shifters and reduces BOM count while maintaining 6.3 ns timing integrity for synchronous control loops. |
Use Scenario: Extending limited FPGA GPIO resources to drive multiple 5-V peripherals (e.g., displays, encoders, relays) without compromising signal integrity. IC Role / Device Role / Timing Role: Octal-directional buffer translating and isolating FPGA-side logic levels to external 5-V logic families. Use Value: Enables hot-plug capability via Ioff, preventing damage during field-replaceable module insertion into powered systems. |
| Automated Test Equipment (ATE) Signal Routing | Programmable Logic Controller (PLC) I/O Module |
Use Scenario: Routing configurable digital test patterns between 3.3-V pattern generators and 5-V DUT interfaces inside rack-mounted ATE chassis. IC Role / Device Role / Timing Role: Precision-controlled bus switch enabling deterministic signal path selection and isolation during test sequence execution. Use Value: Delivers sub-7 ns propagation delay consistency across all eight channels - critical for setup/hold timing validation. |
Use Scenario: Isolating CPU-side 3.3-V logic from field-side 5-V industrial sensors and actuators in modular PLC I/O cards. IC Role / Device Role / Timing Role: Fault-tolerant bidirectional translator supporting both sensor readback and actuator command transmission. Use Value: Latch-up immunity >100 mA per JESD 78 Class II ensures robustness against transient overvoltage events in electrically noisy factory floors. |
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; lacks VOLP & VOHV specs; identical pinout and logic | Lower noise immunity in high-speed routing; unsuitable where output transient suppression is required | Select SN74LVCZ245APWR when ground bounce & output undershoot must be minimized in dense PCB layouts |
| 74ALVC16245 | 16-bit version in 48-pin TSSOP; higher channel count; same VCC range and 5-V tolerance | Used where full 16-bit parallel data paths are needed instead of octal; larger footprint and layout complexity | Choose SN74LVCZ245APWR for space-constrained 8-bit bridges; use 74ALVC16245 only when doubling channel density justifies added size |
Compared with SN74LVC245A, the SN74LVCZ245APWR adds verified ground-bounce and output-undershoot suppression for cleaner signal integrity; compared with 74ALVC16245, it offers half the channel count in a 20-pin footprint ideal for compact 8-bit interconnects.
Availability
SN74LVCZ245APWR is available at Aetrix Electronics and suitable for industrial backplane interconnects, FPGA I/O expansion bridges, automated test equipment signal routing, and programmable logic controller I/O modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74LVCZ245APWR 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 with over 50 years of innovation in industrial, automotive, and communications markets.
The SN74LVCZ245APWR belongs to TI's LVCZ logic family, engineered specifically for robust mixed-voltage system interfacing with enhanced transient suppression - targeting industrial control, test instrumentation, and modular computing infrastructure.
FAQ
What is the maximum input voltage the SN74LVCZ245APWR can safely accept?
The SN74LVCZ245APWR accepts input voltages up to 5.5 V on all A and B port pins, independent of VCC (2.7–3.6 V). This 5-V tolerance is specified in the absolute maximum ratings and confirmed in the recommended operating conditions table, enabling direct interface with legacy 5-V logic without external protection components.
Does the SN74LVCZ245APWR support hot insertion, and how is it implemented?
Yes, the SN74LVCZ245APWR supports hot insertion through two integrated features: Ioff circuitry disables outputs when VCC = 0 V, blocking damaging back-current, and power-up 3-state holds outputs in high-impedance until VCC exceeds 1.5 V. Both mechanisms are tested per JEDEC standards and documented in the functional description section of the datasheet.
What is the propagation delay of the SN74LVCZ245APWR at 3.3 V, and how does it vary with load?
The SN74LVCZ245APWR has a maximum propagation delay (tpd) of 6.3 ns at VCC = 3.3 V with CL = 30 pF, as measured in the switching characteristics table. This value is guaranteed across –40°C to +85°C and represents worst-case delay for A↔B or B↔A data paths under standard test conditions.
Can the SN74LVCZ245APWR be used in a 2.5-V system?
No - the SN74LVCZ245APWR is not characterized or guaranteed for operation at 2.5 V. Its recommended operating VCC range is strictly 2.7 V to 3.6 V, with electrical specifications (e.g., VOH/VOL, drive strength) validated only within that window. Operation below 2.7 V may result in undefined logic states or reduced noise margins.
What package type and dimensions does the SN74LVCZ245APWR use?
The SN74LVCZ245APWR uses the TSSOP-20 (PW) package: 4.4 mm × 6.5 mm body size, 0.65 mm lead pitch, 1.2 mm maximum height, and 20 terminals. Pin 1 location and land pattern details are defined in TI's PW0020A package outline drawing, revision A (2017).
SN74LVCZ245APWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVCZ
- Package/Case:
- 20-TSSOP (0.173", 4.40mm 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-TSSOP
SN74LVCZ245APWR FAQ
1.How can I place an order for SN74LVCZ245APWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVCZ245APWR 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 SN74LVCZ245APWR reliable?
The price and inventory of SN74LVCZ245APWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVCZ245APWR is usually 5 days.
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SN74LVCZ245APWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVCZ245APWR 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 SN74LVCZ245APWR?
For technical support, including SN74LVCZ245APWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVCZ245APWR requirements.
6.How does Aetrix verify that SN74LVCZ245APWR is sourced from the original manufacturer or authorized distributors?
All SN74LVCZ245APWR 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 SN74LVCZ245APWR meets industry standards.
7.What is the process for return or replacement of SN74LVCZ245APWR?
All SN74LVCZ245APWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVCZ245APWR, 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 SN74LVCZ245APWR part is unused and in its original packaging.
Return procedure for SN74LVCZ245APWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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