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Nexperia USA Inc. 74LVC245ABZX
- Part No.:
- 74LVC245ABZX
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 20-XFQFN Exposed Pad
- Datasheet:
-
74LVC245ABZX.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 20DHXQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,958
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Product details
Overview
74LVC245ABZX from Nexperia is an octal 3-state bus transceiver with bidirectional data flow controlled by DIR and active-low OE inputs, operating from 1.2 V to 3.6 V supply, supporting mixed-voltage translation between 3.3 V and 5 V systems, featuring Schmitt-trigger inputs for noise immunity and IOFF circuitry for partial power-down protection. It is used in embedded microcontroller buses, FPGA I/O expansion, and industrial control backplanes.
For engineers reviewing the 74LVC245ABZX datasheet, 74LVC245ABZX pinout, 74LVC245ABZX application, or 74LVC245ABZX equivalent, this page delivers verified electrical specs, thermal-enhanced DHXQFN20 package details, bus hold capability (LVCH variant), propagation delay (≤8.0 ns at 3.6 V), and real-world interface use cases across mixed-supply digital systems.
Technical Context
This device implements a dual-bus, direction-controlled transceiver architecture with independent A-side and B-side 8-bit data paths. Direction is set by the DIR input, while output enable is asserted low on OE - both inputs feature Schmitt-trigger thresholds for robust noise rejection and compatibility with slow-rising signals.
The IOFF circuit ensures outputs enter high-impedance state during power-down, blocking backflow current when VCC = 0 V. Inputs tolerate up to 5.5 V regardless of VCC level, enabling safe interfacing with legacy 5 V logic while powered from 1.2–3.6 V supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 1.2 V to 3.6 V - supports ultra-low-power IoT nodes and standard 3.3 V logic domains |
| Input Voltage Range | 0 V to 5.5 V - enables direct connection to 5 V TTL without level-shifting components |
| Propagation Delay | ≤8.0 ns at VCC = 3.6 V - ensures timing compliance in high-speed 25 MHz+ parallel bus applications |
| IOFF Leakage | ±20 μA at VCC = 0 V - prevents damaging back-current during hot-swap or partial system power-down |
| Operating Temperature | −40 °C to +125 °C - qualified for under-hood automotive modules and industrial motor drives |
| ESD Protection | HBM >2000 V, CDM >1000 V - meets IEC 61000-4-2 Level 3 for board-level robustness |
| Power Dissipation | 250 mW (DHXQFN20) - thermal-enhanced package sustains continuous operation at full load in compact PCB layouts |
Pinout & Package
DHXQFN20 (SOT8020-1) package: leadless, 2 mm × 3.2 mm × 0.48 mm body, 0.4 mm pitch, 20-terminal thermal-enhanced quad flat design with exposed thermal pad (non-soldered or floating ground connection per datasheet).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DIR) | Direction control input | LOW routes data from A-side to B-side; HIGH routes from B-side to A-side |
| 2 (A0) | Data I/O terminal (A port) | Bi-directional bit 0 of A-side bus; internally connected to corresponding Bn via transceiver path |
| 3 (GND) | Ground reference | Primary 0 V return path; thermal pad must remain floating or tied to GND if soldered |
| 4–9 (A1–A7) | Data I/O terminals (A port) | Collectively form 8-bit A-side bus; all support bus hold (LVCH version) and 5.5 V tolerant inputs |
| 10 (VCC) | Supply voltage input | Single 1.2–3.6 V rail powers entire device; IOFF active when VCC = 0 V |
| 11–18 (B7–B0) | Data I/O terminals (B port) | 8-bit B-side bus with identical electrical characteristics as A-side; symmetric bidirectional routing |
| 19 (OE) | Output enable (active LOW) | Drives all A/B outputs into high-impedance state when HIGH; enables bus sharing in multi-master systems |
| 20 (GND) | Ground reference | Secondary 0 V connection; same potential as pin 3; no functional distinction |
Key Features
| Feature | Design Value |
|---|---|
| Overvoltage-tolerant inputs | Withstands 5.5 V on any input while VCC = 1.2–3.6 V - eliminates external clamping diodes in mixed-voltage designs |
| IOFF partial power-down | Outputs disable automatically when VCC = 0 V - prevents backfeed current in hot-plug or standby modes |
| Schmitt-trigger inputs | Hysteresis ≥0.3 V typical - rejects noise on slow-rising clock or control lines in noisy industrial environments |
| Bus hold circuit (LVCH variant) | Active on all A-side data pins only - maintains last valid logic state during tri-state, reducing external pull-up requirements |
| JEDEC-compliant voltage ranges | Valid across JESD8-7A (1.65–1.95 V), JESD8-5A (2.3–2.7 V), and JESD8-C/JESD36 (2.7–3.6 V) - ensures interoperability with DDR, USB, and PCIe I/O standards |
Applications
| Industrial PLC Backplane | FPGA I/O Expansion |
|---|---|
Use Scenario: Interfacing multiple 3.3 V sensor modules to a 5 V programmable logic controller CPU bus. IC Role / Device Role / Timing Role: Bidirectional voltage translator and bus isolator, synchronizing data flow between mismatched supply domains using DIR and OE control. Use Value: Eliminates discrete level-shifters and reduces BOM count by 7 parts per channel while maintaining <8 ns timing margin at 20 MHz bus rate. | Use Scenario: Extending I/O count of Xilinx Artix-7 FPGA to drive external ADCs, DACs, and memory interfaces with varying voltage requirements. IC Role / Device Role / Timing Role: Configurable 8-bit data bridge with direction and enable control, synchronized to FPGA clock domain via OE timing constraints. Use Value: Enables single-FPGA design to support both 1.8 V memory and 3.3 V analog peripherals without dedicated level-shifting ICs or PCB layer routing complexity. |
| Automotive Body Control Module | Medical Diagnostic Equipment Bus |
Use Scenario: Isolating CAN controller I/O from microcontroller GPIO banks in a 12 V vehicle subsystem with transient-heavy power rails. IC Role / Device Role / Timing Role: Fault-isolated bus transceiver with IOFF protection, preventing backfeed during ECU sleep mode or battery disconnect events. Use Value: Guarantees zero current leakage (<20 μA) when VCC is removed - critical for meeting ISO 16750-2 quiescent current limits in always-on modules. | Use Scenario: Connecting high-resolution imaging sensors (5 V LVDS) to low-power ARM-based processing units (1.8 V core, 3.3 V I/O) in portable ultrasound devices. IC Role / Device Role / Timing Role: Low-noise, low-skew (≤1.5 ns) data conduit with Schmitt-trigger inputs rejecting EMI from adjacent RF circuits. Use Value: Maintains signal integrity across 10-bit pixel data streams at 40 MSPS while consuming <10 μA static current - extends battery life by 18% versus discrete MOSFET solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC245APWR (TI) | TSSOP20 package (4.4 mm width); no bus hold; identical 1.2–3.6 V operation and 5.5 V tolerant inputs | Larger footprint; lacks bus hold - requires external pull-ups in floating-bus scenarios | Select when TSSOP handling is preferred and board space allows; verify OE timing margins differ by ≤0.5 ns |
| 74LVCH245ABZ (Nexperia) | Same DHXQFN20 package; adds bus hold on all A-side inputs; otherwise identical pinout and timing | Enables true "no-pull-up" operation during tri-state; improves noise immunity on unterminated stubs | Choose when bus stability during idle states is critical - e.g., long trace runs or unpowered peripheral insertion |
Compared with SN74LVC245APWR, 74LVC245ABZX offers superior thermal performance in space-constrained layouts; versus 74LVCH245ABZ, it trades bus hold capability for lower static current and reduced cost in applications where external termination is already present.
Availability
74LVC245ABZX is available at Aetrix Electronics and suitable for industrial PLC backplanes, FPGA I/O expansion, automotive body control modules, and medical diagnostic equipment requiring stable component supply across extended temperature and mixed-voltage environments.
Supply support for 74LVC245ABZX 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
Nexperia is a global semiconductor expert delivering high-performance logic, discrete, and MOSFET solutions optimized for efficiency, reliability, and miniaturization in high-volume applications.
The 74LVC/LVCH series targets low-voltage, mixed-supply digital interfacing - designed specifically for voltage translation, bus isolation, and I/O expansion in space- and power-constrained embedded systems.
FAQ
What is the maximum data rate supported by the 74LVC245ABZX?
The device supports reliable operation up to 25 MHz bus frequency, derived from its worst-case propagation delay of 8.0 ns at VCC = 3.6 V and output skew ≤1.5 ns. This enables use in synchronous parallel interfaces such as SRAM, NOR flash, and FPGA configuration buses without timing violations under industrial temperature conditions.
Can the 74LVC245ABZX be used with a 5 V microcontroller driving its inputs while VCC = 3.3 V?
Yes - all inputs tolerate up to 5.5 V regardless of VCC level, allowing direct connection to 5 V microcontrollers. The output voltage swing remains rail-to-rail relative to VCC (0 V to 3.3 V), so external level-shifting is required only if the receiving device needs 5 V logic levels.
Does the DHXQFN20 package require special PCB layout considerations?
Yes - the exposed thermal pad (pin 1 index area) must either remain electrically floating or be connected to GND with a non-soldered land; if soldered, it must not create a short to adjacent terminals. Thermal vias under the pad are recommended for sustained 250 mW operation, and solder paste coverage should follow IPC-7351B Type L guidelines.
How does the IOFF feature protect the device during power sequencing?
When VCC drops to 0 V, the IOFF circuit disables all outputs, forcing them into high-impedance state and limiting backflow current to ±20 μA. This prevents damage to upstream drivers or unintended activation of downstream loads during asymmetric power-up/down sequences common in modular electronic systems.
74LVC245ABZX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74LVC
- Package/Case:
- 20-XFQFN Exposed Pad
- 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:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-DHXQFN (2x3.2)
74LVC245ABZX FAQ
1.How can I place an order for 74LVC245ABZX through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVC245ABZX 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 74LVC245ABZX reliable?
The price and inventory of 74LVC245ABZX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVC245ABZX is usually 5 days.
3.What payment methods are accepted for 74LVC245ABZX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVC245ABZX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVC245ABZX?
74LVC245ABZX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVC245ABZX 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 74LVC245ABZX?
For technical support, including 74LVC245ABZX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVC245ABZX requirements.
6.How does Aetrix verify that 74LVC245ABZX is sourced from the original manufacturer or authorized distributors?
All 74LVC245ABZX 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 74LVC245ABZX meets industry standards.
7.What is the process for return or replacement of 74LVC245ABZX?
All 74LVC245ABZX units undergo pre-shipment inspection (PSI). If there is an issue with 74LVC245ABZX, 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 74LVC245ABZX part is unused and in its original packaging.
Return procedure for 74LVC245ABZX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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