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

onsemi 74LCXP16245MEAX

Name: 74LCXP16245MEAX
Brand: onsemi
SKU: 74LCXP16245MEAX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74LCXP16245MEAX

Manufacturer:: onsemi

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 48-BSSOP (0.295", 7.50mm Width)

Datasheet:: 74LCXP16245MEAX.pdf

Description:: IC TXRX NON-INVERT 3.6V 48SSOP

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Product details

Overview

74LCXP16245MEAX from Fairchild Semiconductor is a low-voltage 16-bit bidirectional transceiver with 5V-tolerant I/O, built-in 30 kΩ pull-down resistors, 5.5 ns max propagation delay at 3.3 V, and 24 mA output drive capability. It enables level-shifting between 2.3–3.6 V logic buses and 5 V signal environments in space-constrained modular systems.

For engineers reviewing the 74LCXP16245MEAX datasheet, pinout, applications, or equivalent options, key selection criteria include 5V tolerance on all I/O pins, byte-level direction control (T/R), independent OE gating per byte, and guaranteed 3-STATE leakage ≤500 pA at 5.5 V.

Technical Context

The 74LCXP16245MEAX implements two independent 8-bit bidirectional data paths (A0–A7/B0–B7 and A8–A15/B8–B15), each controlled by dedicated T/R and OE inputs. Its CMOS design supports live insertion/withdrawal and maintains high-impedance outputs during power-up when OE is pulled up to V_CC.

Each I/O pin integrates a 30 kΩ pull-down resistor active only in 3-STATE mode-ensuring stable bus termination without external components. The device operates across 2.3–3.6 V V_CC, with input voltage range extended to 0–5.5 V and output drive specified at ±24 mA (V_CC = 3.0 V).

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	2.3 V to 3.6 V - Enables operation in 2.5 V and 3.3 V systems while maintaining compatibility with legacy 5 V buses.
Propagation Delay	5.5 ns max (V_CC = 3.3 V) - Supports high-speed data transfer in 100+ MHz bus applications with tight timing budgets.
I/O Voltage Tolerance	0–5.5 V - Allows direct interfacing to 5 V peripherals without level-shifters or clamping diodes.
Output Drive	±24 mA (V_CC = 3.0 V) - Drives standard TTL loads and multiple CMOS inputs under worst-case conditions.
Pull-down Resistor	30 kΩ to GND - Actively terminates floating I/Os in 3-STATE mode, eliminating need for external resistors in dense PCB layouts.
3-STATE Leakage	≤500 pA at V_I/V_O = 5.5 V - Ensures minimal bus leakage current during high-impedance hold, critical for low-power standby modes.

Pinout & Package

74LCXP16245MEAX is packaged in a 48-lead Small Shrink Outline Package (SSOP), JEDEC MO-118, 0.300" wide (Package Number MS48A). Dimensions: 10.2 mm × 5.3 mm × 1.7 mm (L × W × H), pitch 0.5 mm.

Pin/Terminal	Circuit Role	Design Meaning
OE1, OE2	Output Enable Inputs (active-low)	Disable both A and B ports of respective byte (0–7 or 8–15) into high-impedance state; required for bus arbitration.
T/R1, T/R2	Transmit/Receive Control Inputs	Determine data flow direction per byte: LOW = B→A, HIGH = A→B; enables independent bidirectional control per 8-bit segment.
A0–A15	Side A I/O Terminals	Bidirectional data path pins with 5V-tolerant inputs/outputs and integrated pull-downs active only in 3-STATE mode.
B0–B15	Side B I/O Terminals	Identical electrical behavior to A-side pins; supports full 16-bit or split 8-bit bus bridging configurations.

Key Features

Feature	Design Value
5V-tolerant I/O	Supports mixed-voltage system integration without external protection circuitry or level translators.
Integrated 30 kΩ pull-downs	Eliminates need for 32 discrete resistors in modular designs, reducing BOM count and board area in space-constrained applications.
Byte-selectable control	Enables partial bus isolation: one 8-bit segment can be active while the other remains in high-Z, improving signal integrity in segmented backplanes.
Live insertion support	Guaranteed high-impedance startup behavior when OE is tied to V_CC via pull-up, enabling hot-swap capability in modular chassis systems.

Applications

Industrial Backplane Interface	Modular PLC I/O Expansion
Use Scenario: Connecting 3.3 V controller modules to legacy 5 V sensor/actuator buses in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional voltage-level translator and bus isolator with per-byte direction control. Use Value: Eliminates external level shifters and pull-down networks while ensuring deterministic bus states during module insertion/removal.	Use Scenario: Hot-pluggable I/O carrier boards in distributed control systems where space and thermal density are constrained. IC Role / Device Role / Timing Role: 16-bit bidirectional buffer with integrated termination and live-insertion-safe enable sequencing. Use Value: Reduces component count by 32 resistors per transceiver and guarantees safe high-Z state during power ramp-up.
Low-Power Embedded Memory Bus	Test Equipment Signal Conditioning
Use Scenario: Interfacing low-voltage microcontrollers (2.5 V/3.3 V) to 5 V SRAM or Flash memory devices in portable instrumentation. IC Role / Device Role / Timing Role: High-speed bidirectional data path with sub-6 ns propagation and 24 mA drive strength. Use Value: Meets setup/hold timing margins for 100 MHz asynchronous memory access while minimizing supply current (20 µA ICC max).	Use Scenario: Signal conditioning and isolation between DUT interface boards and 5 V test instrumentation in automated test equipment. IC Role / Device Role / Timing Role: Robust bidirectional buffer with ESD protection (2000 V HBM) and latch-up immunity (>500 mA). Use Value: Withstands repeated probe contact events and prevents cross-talk-induced glitches on shared test buses.

Industrial Backplane Interface

Modular PLC I/O Expansion

Use Scenario: Connecting 3.3 V controller modules to legacy 5 V sensor/actuator buses in programmable logic controllers.

IC Role / Device Role / Timing Role: Bidirectional voltage-level translator and bus isolator with per-byte direction control.

Use Value: Eliminates external level shifters and pull-down networks while ensuring deterministic bus states during module insertion/removal.

Use Scenario: Hot-pluggable I/O carrier boards in distributed control systems where space and thermal density are constrained.

IC Role / Device Role / Timing Role: 16-bit bidirectional buffer with integrated termination and live-insertion-safe enable sequencing.

Use Value: Reduces component count by 32 resistors per transceiver and guarantees safe high-Z state during power ramp-up.

Low-Power Embedded Memory Bus

Test Equipment Signal Conditioning

Use Scenario: Interfacing low-voltage microcontrollers (2.5 V/3.3 V) to 5 V SRAM or Flash memory devices in portable instrumentation.

IC Role / Device Role / Timing Role: High-speed bidirectional data path with sub-6 ns propagation and 24 mA drive strength.

Use Value: Meets setup/hold timing margins for 100 MHz asynchronous memory access while minimizing supply current (20 µA ICC max).

Use Scenario: Signal conditioning and isolation between DUT interface boards and 5 V test instrumentation in automated test equipment.

IC Role / Device Role / Timing Role: Robust bidirectional buffer with ESD protection (2000 V HBM) and latch-up immunity (>500 mA).

Use Value: Withstands repeated probe contact events and prevents cross-talk-induced glitches on shared test buses.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
74LVC16245APAG	No integrated pull-down resistors; requires external termination; 3.6 V V_CC max; 6.7 ns t_PD at 3.3 V.	Suitable for designs where external resistors are acceptable and lower cost is prioritized over board space savings.	Select when BOM simplification is secondary to unit cost and external termination is already present in layout.
SN74AVC16245DGGR	Lower V_CC range (1.2–3.6 V); no internal pull-downs; 3.8 ns t_PD at 2.5 V; supports 1.8 V I/O translation.	Better suited for ultra-low-voltage SoC interfaces but lacks built-in bus termination for 5 V tolerant operation.	Choose for sub-2.5 V systems requiring faster propagation, but verify external termination strategy for 5 V bus compatibility.

Compared with 74LCXP16245MEAX, the 74LVC16245APAG reduces cost but increases board area and BOM complexity, while the SN74AVC16245DGGR improves speed and voltage flexibility at the expense of integrated bus stabilization-making 74LCXP16245MEAX optimal for space-constrained 3.3 V/5 V bridging where deterministic idle-state behavior is critical.

Availability

74LCXP16245MEAX is available at Aetrix Electronics and suitable for industrial backplane interfaces, modular PLC I/O expansion, and low-power embedded memory bus applications requiring stable component supply and long-term lifecycle support.

Supply support for 74LCXP16245MEAX 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

Fairchild Semiconductor was a U.S.-based semiconductor company specializing in power management, analog, and logic ICs before its acquisition by ON Semiconductor in 2016. Its legacy logic portfolio remains widely deployed in industrial and embedded systems.

The 74LCXP16245MEAX belongs to the LCX family of advanced CMOS logic devices designed specifically for low-voltage, high-speed bus interface applications with robust 5 V tolerance and integrated signal integrity features.

FAQ

What is the recommended pull-up resistor value for OE on the 74LCXP16245MEAX?

The datasheet specifies that OE should be tied to V_CC through a pull-up resistor to ensure high-impedance state during power-up or power-down. The minimum resistor value depends on the current-sourcing capability of the driver, but typical values range from 4.7 kΩ to 10 kΩ for 3.3 V systems. This ensures reliable startup behavior and supports live insertion functionality in the 74LCXP16245MEAX.

Does the 74LCXP16245MEAX support true 5 V operation on V_CC?

No, the 74LCXP16245MEAX does not operate with 5 V on V_CC. Its V_CC supply range is strictly 2.3 V to 3.6 V. However, all I/O pins are 5 V tolerant-meaning they accept and drive signals up to 5.5 V regardless of V_CC level. This allows the 74LCXP16245MEAX to bridge 3.3 V logic domains to 5 V peripherals safely.

How do the internal pull-down resistors function in the 74LCXP16245MEAX?

The 30 kΩ pull-down resistors in the 74LCXP16245MEAX are active only when the corresponding I/O pin is in 3-STATE (high-impedance) mode-i.e., when OE is HIGH. They are disconnected when the output is actively driven (OE LOW), preventing contention or excessive current draw. This behavior ensures stable bus states during idle periods without impacting active signal integrity in the 74LCXP16245MEAX.

Can the 74LCXP16245MEAX be used in hot-swap applications?

Yes, the 74LCXP16245MEAX supports live insertion and withdrawal per datasheet Note 1. When OE is properly tied to V_CC via a pull-up resistor, the device enters a high-impedance state during power-up/down transitions, preventing bus conflicts. This makes the 74LCXP16245MEAX suitable for modular chassis systems where cards are inserted or removed while the backplane remains powered.

What is the maximum output drive strength of the 74LCXP16245MEAX at 2.5 V V_CC?

At V_CC = 2.5 V, the 74LCXP16245MEAX delivers ±8 mA output drive (I_OH/I_OL) per pin, as specified in the DC Electrical Characteristics table. This is sufficient to drive standard CMOS loads and small fanouts in low-voltage systems. Performance scales with V_CC: it provides ±12 mA at 2.7 V and ±24 mA at 3.0 V, confirming the 74LCXP16245MEAX's graded drive capability across its operating range.

74LCXP16245MEAX Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: 74LCXP

Package/Case:: 48-BSSOP (0.295", 7.50mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Logic Type:: Transceiver, Non-Inverting

Number of Elements:: 2

Number of Bits per Element:: 8

Input Type:: -

Output Type:: 3-State

Current - Output High, Low:: 24mA, 24mA

Voltage - Supply:: 2V ~ 3.6V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 48-SSOP

74LCXP16245MEAX FAQ

1.How can I place an order for 74LCXP16245MEAX through Aetrix?

Please submit a Request for Quotation (RFQ) for 74LCXP16245MEAX 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 74LCXP16245MEAX reliable?

The price and inventory of 74LCXP16245MEAX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LCXP16245MEAX is usually 5 days.

3.What payment methods are accepted for 74LCXP16245MEAX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LCXP16245MEAX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74LCXP16245MEAX?

74LCXP16245MEAX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74LCXP16245MEAX 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 74LCXP16245MEAX?

For technical support, including 74LCXP16245MEAX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LCXP16245MEAX requirements.

6.How does Aetrix verify that 74LCXP16245MEAX is sourced from the original manufacturer or authorized distributors?

All 74LCXP16245MEAX 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 74LCXP16245MEAX meets industry standards.

7.What is the process for return or replacement of 74LCXP16245MEAX?

All 74LCXP16245MEAX units undergo pre-shipment inspection (PSI). If there is an issue with 74LCXP16245MEAX, 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 74LCXP16245MEAX part is unused and in its original packaging.

Return procedure for 74LCXP16245MEAX:

1.Submit a request within 90 days.

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

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