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Home > Products > Integrated Circuits (ICs) > Logic > Buffers, Drivers, Receivers, Transceivers

Texas Instruments SN74LVCZ245ANS

Name: SN74LVCZ245ANS
Brand: Texas Instruments
SKU: SN74LVCZ245ANS
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74LVCZ245ANS

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: -

Datasheet:: SN74LVCZ245ANS.pdf

Description:: BUS TRANSCEIVER 8BIT 20SO

Quantity:: RFQ Add To RFQ list

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Product details

Overview

SN74LVCZ245ANS from Texas Instruments is an octal bus transceiver with 3-state outputs, designed for asynchronous bidirectional data transfer between 2.7-V and 3.6-V buses. It supports mixed-mode signaling (5-V inputs with 3.3-V V_CC), delivers 6.3 ns max propagation delay at 3.3 V, and features I_off and power-up 3-state for hot-insertion in backplane or modular system interfaces.

For engineers reviewing the SN74LVCZ245ANS datasheet, SN74LVCZ245ANS pinout, SN74LVCZ245ANS application, or SN74LVCZ245ANS equivalent, key selection criteria include its 20-pin SO (NS) package, ±24-mA drive strength at 3 V, 5.5-V tolerant inputs, and guaranteed high-impedance behavior during power sequencing - critical for FPGA-to-ASIC interconnects and legacy-to-modern voltage domain bridging.

Technical Context

This device implements dual-bus directional control via DIR input and output enable/disable via OE, enabling A→B or B→A data flow with isolation when OE is high. Its I_off circuitry blocks current backflow during power-down, while power-up 3-state ensures outputs remain high-Z until V_CC exceeds 1.5 V - eliminating bus contention during hot-swap events.

Input thresholds are fixed relative to V_CC (V_IL ≤ 0.8 V, V_IH ≥ 2.0 V), and output VOH/VOL specs are validated at both 2.7 V and 3.0 V supply levels. The 3.3-V typical ground bounce (V_OLP < 0.8 V) and undershoot (V_OHV > 2 V) values confirm robust noise margin in dense PCB layouts.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	2.7 V to 3.6 V - defines valid operating window; operation outside this range invalidates timing and drive specs
Max t_pd	6.3 ns at V_CC = 3.3 V - determines maximum achievable data rate in synchronous bus systems
Input Voltage Tolerance	0 V to 5.5 V - enables direct interfacing with 5-V logic without level-shifting components
I_OL/I_OH	±24 mA at V_CC = 3 V - supports driving 50-Ω transmission lines or multiple CMOS loads per channel
I_off	±5 µA at V_I/V_O = 5.5 V - prevents damaging back-current during partial power-down in modular systems
Power-Up 3-State	Active below 1.5 V V_CC - guarantees bus isolation during slow-ramp power delivery (e.g., sequenced supplies)
Latch-Up Immunity	>100 mA per JESD 78 Class II - ensures survivability under transient overvoltage or ESD stress

Pinout & Package

SN74LVCZ245ANS uses a 20-pin SO (NS) surface-mount package (JEDEC MO-153 compliant), 7.5 mm × 12.8 mm body, 1.75 mm height, with 0.65 mm lead pitch and gull-wing leads.

Pin/Terminal	Circuit Role	Design Meaning
1 (DIR)	Direction Control Input	Low = B→A data flow; High = A→B data flow; determines signal path directionality
2–9 (A1–A8)	Port A Data Inputs/Outputs	Bidirectional I/O pins connected to source bus; driven by or drive external logic
10 (GND)	Ground Reference	Primary return path for all internal logic and I/O currents
11 (V_CC)	Supply Voltage	2.7–3.6 V power rail; powers internal logic and output drivers
12 (OE)	Output Enable Input	Low = outputs active; High = all A/B pins enter high-impedance state
13–20 (B1–B8)	Port B Data Inputs/Outputs	Bidirectional I/O pins connected to destination bus; mirror A-side functionality

Key Features

Feature	Design Value
Mixed-voltage interface support	5-V-tolerant inputs with 3.3-V V_CC enables direct connection between legacy 5-V peripherals and modern low-voltage controllers
Hot-insertion capability	I_off and power-up 3-state eliminate bus conflicts during live module replacement in telecom or industrial backplanes
Low ground bounce & undershoot	Typical V_OLP < 0.8 V and V_OHV > 2 V at 3.3 V reduce switching noise coupling into adjacent signal or power nets
High noise immunity	Input hysteresis and 0.8 V/2.0 V thresholds provide ≥1.2 V noise margin across full V_CC range
Low dynamic power	42 pF power dissipation capacitance (enabled) and only 3 pF (disabled) minimize switching current in burst-mode applications

Applications

Industrial Backplane Interface	FPGA-to-Microcontroller Bridge
Use Scenario: Connecting a 3.3-V FPGA I/O bank to a 5-V industrial PLC I/O module via shared backplane traces. IC Role / Device Role / Timing Role: Bidirectional voltage-level translator and bus isolator, enabling safe data exchange without external level shifters. Use Value: Eliminates need for discrete level-shifting ICs or resistor networks, reducing BOM count and layout area while maintaining 6.3-ns timing integrity.	Use Scenario: Interfacing a 3.3-V microcontroller's parallel address/data bus to a legacy 5-V SRAM chip in embedded instrumentation. IC Role / Device Role / Timing Role: Octal transceiver managing direction-controlled data flow between mismatched voltage domains during read/write cycles. Use Value: Provides guaranteed 3-state isolation during bus arbitration, preventing contention when both devices attempt simultaneous drive.
Modular Test Equipment Slot	Automated Test System (ATE) Fixture
Use Scenario: Hot-pluggable daughterboard carrying analog front-end ASICs into a 3.3-V main controller chassis. IC Role / Device Role / Timing Role: Isolation buffer with I_off protection, ensuring no current flows from powered main board into unpowered module during insertion. Use Value: Enables true hot-swap capability without mechanical interlocks or complex power sequencing, reducing test setup time.	Use Scenario: Signal conditioning and bus buffering between 5-V DUT interface connectors and 3.3-V ATE controller logic. IC Role / Device Role / Timing Role: Direction-controlled data pipeline synchronizing test pattern generation and response capture across voltage domains. Use Value: Delivers sub-7-ns propagation delay consistency across all eight channels, critical for tight timing margins in high-speed digital test vectors.

Industrial Backplane Interface

FPGA-to-Microcontroller Bridge

Use Scenario: Connecting a 3.3-V FPGA I/O bank to a 5-V industrial PLC I/O module via shared backplane traces.

IC Role / Device Role / Timing Role: Bidirectional voltage-level translator and bus isolator, enabling safe data exchange without external level shifters.

Use Value: Eliminates need for discrete level-shifting ICs or resistor networks, reducing BOM count and layout area while maintaining 6.3-ns timing integrity.

Use Scenario: Interfacing a 3.3-V microcontroller's parallel address/data bus to a legacy 5-V SRAM chip in embedded instrumentation.

IC Role / Device Role / Timing Role: Octal transceiver managing direction-controlled data flow between mismatched voltage domains during read/write cycles.

Use Value: Provides guaranteed 3-state isolation during bus arbitration, preventing contention when both devices attempt simultaneous drive.

Modular Test Equipment Slot

Automated Test System (ATE) Fixture

Use Scenario: Hot-pluggable daughterboard carrying analog front-end ASICs into a 3.3-V main controller chassis.

IC Role / Device Role / Timing Role: Isolation buffer with I_off protection, ensuring no current flows from powered main board into unpowered module during insertion.

Use Value: Enables true hot-swap capability without mechanical interlocks or complex power sequencing, reducing test setup time.

Use Scenario: Signal conditioning and bus buffering between 5-V DUT interface connectors and 3.3-V ATE controller logic.

IC Role / Device Role / Timing Role: Direction-controlled data pipeline synchronizing test pattern generation and response capture across voltage domains.

Use Value: Delivers sub-7-ns propagation delay consistency across all eight channels, critical for tight timing margins in high-speed digital test vectors.

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal transceiver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC245A	No Z-series noise-suppression features; higher V_OLP/V_OHV (1.2 V / 1.5 V typ); identical pinout and DC specs	Suitable where ground bounce is less critical; lacks Z-series enhanced EMI performance	Select SN74LVC245A only if cost sensitivity outweighs noise margin requirements in non-critical signal paths
74ALVC245	Wider V_CC range (1.65–3.6 V); lower drive (±24 mA at 2.5 V); same 20-pin SO package	Better suited for ultra-low-voltage systems; not 5-V tolerant - requires external clamping for 5-V inputs	Choose 74ALVC245 only when operating below 2.7 V or when 5-V input tolerance is unnecessary

Compared with SN74LVCZ245ANS, SN74LVC245A offers identical functionality but reduced noise suppression, while 74ALVC245 trades 5-V tolerance for lower-voltage operation - making SN74LVCZ245ANS the optimal choice for mixed-domain systems requiring robust EMI performance and hot-swap safety.

Availability

SN74LVCZ245ANS is available at Aetrix Electronics and suitable for industrial backplane interfaces, FPGA-to-peripheral bridges, modular test equipment slots, and automated test system fixtures requiring stable component supply and long-term manufacturability.

Supply support for SN74LVCZ245ANS 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 decades of expertise in high-reliability interface ICs.

The SN74LVCZ245ANS belongs to TI's LVCZ logic family, engineered specifically for noise-sensitive, mixed-voltage system interconnects in industrial automation, test equipment, and modular computing platforms.

FAQ

What is the maximum operating temperature range for SN74LVCZ245ANS?

The SN74LVCZ245ANS is rated for operation from –40°C to +85°C ambient temperature, matching the extended industrial temperature grade specified in its ordering information and absolute maximum ratings table. This range applies to continuous operation under recommended supply and signal conditions, and is validated across all electrical and switching parameters in the SCES275G datasheet.

Does SN74LVCZ245ANS support true 5-V input compatibility?

Yes, SN74LVCZ245ANS accepts input voltages up to 5.5 V regardless of V_CC level, enabling direct connection to 5-V TTL or CMOS outputs without external level shifters. This 5-V tolerance is explicitly guaranteed in the "recommended operating conditions" and "absolute maximum ratings" sections of the datasheet.

Can SN74LVCZ245ANS be used in hot-swap applications?

Yes, SN74LVCZ245ANS incorporates both I_off circuitry and power-up 3-state logic, which are explicitly designed for hot-insertion. These features prevent back-current flow and ensure outputs remain high-impedance during power-up/down, satisfying JEDEC-compliant hot-swap requirements in modular systems.

What is the pin count and package type of SN74LVCZ245ANS?

SN74LVCZ245ANS uses a 20-pin SO (NS) package - a narrow-body surface-mount small-outline integrated circuit conforming to JEDEC MO-153. Its dimensions are 7.5 mm × 12.8 mm with 0.65 mm lead pitch, and it is supplied in tape-and-reel format (2000 units per reel).

How does SN74LVCZ245ANS differ from standard SN74LVC245A?

SN74LVCZ245ANS includes Z-series enhancements: lower ground bounce (V_OLP < 0.8 V vs. 1.2 V typical) and reduced output undershoot (V_OHV > 2 V vs. 1.5 V typical), achieved via optimized output stage design. All other DC, AC, and functional specifications - including pinout, V_CC range, and 5-V input tolerance - are identical to SN74LVC245A.

SN74LVCZ245ANS Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74LVCZ

Package/Case:: -

Packaging:: Bulk

Product Status:: Active

Logic Type:: -

Number of Elements:: -

Number of Bits per Element:: -

Input Type:: -

Output Type:: -

Current - Output High, Low:: -

Voltage - Supply:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

SN74LVCZ245ANS FAQ

1.How can I place an order for SN74LVCZ245ANS through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74LVCZ245ANS 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 SN74LVCZ245ANS reliable?

The price and inventory of SN74LVCZ245ANS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVCZ245ANS is usually 5 days.

3.What payment methods are accepted for SN74LVCZ245ANS?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVCZ245ANS transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN74LVCZ245ANS?

SN74LVCZ245ANS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74LVCZ245ANS 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 SN74LVCZ245ANS?

For technical support, including SN74LVCZ245ANS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVCZ245ANS requirements.

6.How does Aetrix verify that SN74LVCZ245ANS is sourced from the original manufacturer or authorized distributors?

All SN74LVCZ245ANS 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 SN74LVCZ245ANS meets industry standards.

7.What is the process for return or replacement of SN74LVCZ245ANS?

All SN74LVCZ245ANS units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVCZ245ANS, 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 SN74LVCZ245ANS part is unused and in its original packaging.

Return procedure for SN74LVCZ245ANS:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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