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

onsemi 74LVT162245MTDX

Name: 74LVT162245MTDX
Brand: onsemi
SKU: 74LVT162245MTDX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74LVT162245MTDX

Manufacturer:: onsemi

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 48-TFSOP (0.240", 6.10mm Width)

Datasheet:: 74LVT162245MTDX.pdf

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

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Product details

Overview

74LVT162245 from ON Semiconductor (formerly Fairchild) is a low-voltage 16-bit non-inverting bidirectional transceiver with 3-STATE outputs, designed for bus-oriented applications operating at 3.3 V V_CC while interfacing with 5 V TTL systems. It features byte-level control (two independent 8-bit sections), 25 Ω equivalent series resistance on A-port outputs to suppress line noise, and supports ±12 mA drive on A port and ±32/64 mA on B port.

For engineers reviewing the 74LVT162245 datasheet, pinout, applications, or equivalent options, this device is selected for high-speed memory address/clock buffering, bidirectional data bus isolation in mixed-voltage systems, and noise-sensitive 3.3 V–5 V interface translation where controlled edge rates and output termination are critical.

Technical Context

The 74LVT162245 implements two independent 8-bit transceiver sections (A0–A7/B0–B7 and A8–A15/B8–B15), each with dedicated T/R (direction) and OE (output enable) inputs. Direction control is asynchronous and non-inverting: when OE is LOW and T/R is LOW, data flows from B to A; when T/R is HIGH, data flows from A to B.

A-port outputs integrate 25 Ω series resistance in both HIGH and LOW states-eliminating external termination resistors and reducing overshoot/undershoot in transmission-line-driven applications like memory address buses and clock distribution networks. B-port outputs lack internal series resistance but deliver higher drive strength (64 mA sink, 32 mA source).

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	2.7 V to 3.6 V - Ensures stable operation in 3.3 V systems with ±0.3 V tolerance.
A-Port I_O	±12 mA - Sufficient for driving short traces or lightly loaded buses without external termination.
B-Port I_OL/I_OH	64 mA / 32 mA - Supports heavier capacitive loads and longer trace routing on B-side interfaces.
t_PLH/t_PHL (B port)	1.0–3.9 ns @ V_CC = 2.7 V - Enables sub-4 ns propagation for high-throughput data transfer.
Input Voltage Range	0 V to 5.5 V - Allows direct connection to 5 V TTL logic without level shifters.
3-STATE Leakage	<10 µA @ V_CC = 3.6 V - Minimizes bus contention current during high-impedance state.
Operating Temperature	−40 °C to +85 °C - Qualified for industrial ambient environments.

Pinout & Package

74LVT162245 is packaged in a 48-lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1 mm wide, with exposed pad not electrically connected. Pinout follows standard dual-byte transceiver layout with separate control per byte group.

Pin/Terminal	Circuit Role	Design Meaning
A0–A7, A8–A15	Side-A bidirectional I/O	Non-inverting data path with 25 Ω series resistance; used as driver/receiver for low-noise local bus segments.
B0–B7, B8–B15	Side-B bidirectional I/O	Higher-drive, no-series-resistor path for system-level bus interconnection or 5 V interface coupling.
OE1, OE2	Active-low output enable (per byte)	Disables both A and B ports of respective byte to high-impedance; enables partial bus isolation.
T/R1, T/R2	Transmit/Receive direction control (per byte)	Determines data flow direction: LOW = B→A, HIGH = A→B; supports concurrent bidirectional operation across bytes.
V_CC, GND	Power and ground	Two V_CC and two GND pins minimize supply inductance and improve noise immunity in high-speed switching.

Key Features

Feature	Design Value
25 Ω series resistance on A-port outputs	Eliminates need for discrete 25 Ω series termination resistors, reducing BOM count and PCB area in memory address/clock driver designs.
5 V-tolerant inputs	Accepts 0–5.5 V input signals directly, enabling seamless integration into mixed-voltage systems without external level translators.
Byte-wise control architecture	Allows independent enable/direction control of upper and lower 8-bit lanes-supports split-bus protocols and partial data transfers.
Live insertion/extraction support	High-impedance power-up/down behavior prevents bus glitches during hot-swap events in modular backplane or card-edge applications.
Latch-up immunity & ESD robustness	Exceeds 500 mA latch-up rating and 2000 V HBM ESD-ensures reliability in manufacturing handling and field deployment.

Applications

Memory Address Buffering	Clock Distribution Interface
Use Scenario: Driving parallel address lines from a 3.3 V microcontroller to a 5 V SRAM or Flash memory array. IC Role / Device Role / Timing Role: Bidirectional voltage-translating transceiver acting as an A-port–controlled address driver with built-in line matching. Use Value: 25 Ω A-port series resistance suppresses ringing on 50–75 Ω trace impedances, ensuring clean setup/hold timing margins at >100 MHz.	Use Scenario: Distributing a 3.3 V clock signal to multiple 5 V clock inputs across a board while maintaining edge integrity. IC Role / Device Role / Timing Role: Unidirectional clock buffer (A→B mode) leveraging low-skew B-port outputs and 5 V-tolerant inputs. Use Value: Sub-4 ns propagation delay and <1 ns output skew preserve clock phase alignment across fanout branches.
PCI/ISA Bus Isolation	Mixed-Voltage Data Bus Translation
Use Scenario: Isolating legacy 5 V ISA bus peripherals from a modern 3.3 V host controller in industrial control backplanes. IC Role / Device Role / Timing Role: Byte-controlled bidirectional transceiver managing address/data handshaking with independent OE/T/R per lane. Use Value: Independent byte enables allow selective isolation of I/O vs. memory space, reducing bus contention during DMA cycles.	Use Scenario: Interfacing a 3.3 V FPGA I/O bank to a 5 V ASIC data bus in test equipment or protocol analyzers. IC Role / Device Role / Timing Role: Level-shifting transceiver providing bidirectional data flow with simultaneous 3.3 V logic compatibility and 5 V signal swing tolerance. Use Value: Eliminates external level shifters and pull-ups, cutting component cost and layout complexity while maintaining 16-bit throughput.

Memory Address Buffering

Clock Distribution Interface

Use Scenario: Driving parallel address lines from a 3.3 V microcontroller to a 5 V SRAM or Flash memory array.

IC Role / Device Role / Timing Role: Bidirectional voltage-translating transceiver acting as an A-port–controlled address driver with built-in line matching.

Use Value: 25 Ω A-port series resistance suppresses ringing on 50–75 Ω trace impedances, ensuring clean setup/hold timing margins at >100 MHz.

Use Scenario: Distributing a 3.3 V clock signal to multiple 5 V clock inputs across a board while maintaining edge integrity.

IC Role / Device Role / Timing Role: Unidirectional clock buffer (A→B mode) leveraging low-skew B-port outputs and 5 V-tolerant inputs.

Use Value: Sub-4 ns propagation delay and <1 ns output skew preserve clock phase alignment across fanout branches.

PCI/ISA Bus Isolation

Mixed-Voltage Data Bus Translation

Use Scenario: Isolating legacy 5 V ISA bus peripherals from a modern 3.3 V host controller in industrial control backplanes.

IC Role / Device Role / Timing Role: Byte-controlled bidirectional transceiver managing address/data handshaking with independent OE/T/R per lane.

Use Value: Independent byte enables allow selective isolation of I/O vs. memory space, reducing bus contention during DMA cycles.

Use Scenario: Interfacing a 3.3 V FPGA I/O bank to a 5 V ASIC data bus in test equipment or protocol analyzers.

IC Role / Device Role / Timing Role: Level-shifting transceiver providing bidirectional data flow with simultaneous 3.3 V logic compatibility and 5 V signal swing tolerance.

Use Value: Eliminates external level shifters and pull-ups, cutting component cost and layout complexity while maintaining 16-bit throughput.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC16245A	No internal 25 Ω series resistance on either port; 3.3 V only I/O; no 5 V tolerance without external clamping.	Suitable only in pure 3.3 V systems requiring higher speed (t_PD ≈ 2.5 ns) but lacking noise-suppression needs.	Select when board-level termination is already implemented and 5 V interface is unnecessary.
74LVTH162245	Includes bushold on all data inputs; otherwise identical pinout, timing, and electrical specs.	Preferred where unused inputs must remain latched without external pull-ups-e.g., in partially populated FPGA daughterboards.	Choose 74LVTH162245 if input floating-state risk exists; otherwise 74LVT162245 suffices for fully driven buses.

Compared with SN74LVC16245A and 74LVTH162245, the 74LVT162245 uniquely balances 5 V tolerance, integrated A-port termination, and industrial temperature range-making it optimal for legacy bus upgrades and noise-critical 3.3 V/5 V bridging where bushold is not required.

Availability

74LVT162245 is available at Aetrix Electronics and suitable for memory subsystems, clock distribution networks, industrial backplane interfaces, and mixed-voltage data bus translation requiring stable component supply and long-term industrial lifecycle support.

Supply support for 74LVT162245 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

ON Semiconductor (formerly Fairchild Semiconductor) is a global semiconductor manufacturer specializing in power management, analog, logic, and discrete devices for automotive, industrial, and computing markets.

The 74LVT162245 belongs to ON Semiconductor's legacy LVT logic family-designed specifically for high-speed, low-voltage bus interface applications requiring robust 5 V tolerance and noise-suppressed signal integrity in mixed-voltage systems.

FAQ

What is the maximum operating frequency supported by the 74LVT162245?

The 74LVT162245 does not specify a maximum clock frequency in its datasheet, as it is a non-clocked transceiver. Its usable data rate depends on propagation delay (≤3.9 ns for B-port) and system-level signal integrity. In practice, it reliably supports bidirectional data transfers up to 100–150 MHz in well-terminated 50 Ω environments, especially when leveraging its 25 Ω A-port series resistance to dampen reflections. The 74LVT162245 is not intended for synchronous clock-domain crossing but for asynchronous bus buffering and translation.

Can the 74LVT162245 be used in a purely 3.3 V system without 5 V interface requirements?

Yes, the 74LVT162245 operates fully within 2.7–3.6 V V_CC and functions correctly in standalone 3.3 V systems. Its 5 V-tolerant inputs remain benign when driven by 3.3 V logic, and the 25 Ω A-port series resistance continues to provide noise suppression on local traces. The 74LVT162245 retains all timing, drive, and 3-STATE specifications in 3.3 V-only use-making it suitable for high-integrity intra-board bus isolation even without mixed-voltage demands.

Does the 74LVT162245 require external pull-up or pull-down resistors on control pins?

No, the 74LVT162245 does not require external pull-up or pull-down resistors on OE1, OE2, T/R1, or T/R2-its control inputs are TTL-compatible with defined VIH (≥2.0 V) and VIL (≤0.8 V) thresholds at 3.3 V V_CC. However, to ensure deterministic startup behavior, it is recommended to tie OE pins to V_CC via a weak pull-up (e.g., 10 kΩ) or actively drive them, since floating OE inputs may cause unintended 3-STATE activation. The 74LVT162245 itself contains no bushold circuitry on control lines.

How does the 25 Ω series resistance on the A port affect signal integrity compared to the B port?

The 25 Ω series resistance on the 74LVT162245 A port acts as a source termination that matches typical PCB trace impedances (50–75 Ω), reducing reflections, overshoot, and undershoot-especially critical for memory address and clock signals. In contrast, the B port lacks internal resistance and delivers higher current (64 mA sink), making it better suited for driving unterminated or heavily loaded system buses. This asymmetry allows designers to assign noise-sensitive local signals to A and robust system-level signals to B-optimizing integrity and drive capability per path.

Is the 74LVT162245 pin-compatible with the 74LVTH162245?

Yes, the 74LVT162245 is pin-compatible with the 74LVTH162245 in identical packages (e.g., TSSOP-48), sharing identical pin assignments, electrical timing, drive strength, and functional behavior. The sole difference is that the 74LVTH162245 adds bushold circuitry on all data inputs (A0–A15, B0–B15), eliminating the need for external pull-ups on unused inputs. No PCB layout change is required when substituting between these two parts, though firmware or system design should verify whether bushold behavior introduces unintended latching in partially driven configurations.

74LVT162245MTDX Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: 74LVT

Package/Case:: 48-TFSOP (0.240", 6.10mm 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:: 12mA, 12mA; 32mA, 64mA

Voltage - Supply:: 2.7V ~ 3.6V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 48-TSSOP

74LVT162245MTDX FAQ

1.How can I place an order for 74LVT162245MTDX through Aetrix?

Please submit a Request for Quotation (RFQ) for 74LVT162245MTDX 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 74LVT162245MTDX reliable?

The price and inventory of 74LVT162245MTDX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVT162245MTDX is usually 5 days.

3.What payment methods are accepted for 74LVT162245MTDX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVT162245MTDX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74LVT162245MTDX?

74LVT162245MTDX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74LVT162245MTDX 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 74LVT162245MTDX?

For technical support, including 74LVT162245MTDX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVT162245MTDX requirements.

6.How does Aetrix verify that 74LVT162245MTDX is sourced from the original manufacturer or authorized distributors?

All 74LVT162245MTDX 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 74LVT162245MTDX meets industry standards.

7.What is the process for return or replacement of 74LVT162245MTDX?

All 74LVT162245MTDX units undergo pre-shipment inspection (PSI). If there is an issue with 74LVT162245MTDX, 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 74LVT162245MTDX part is unused and in its original packaging.

Return procedure for 74LVT162245MTDX:

1.Submit a request within 90 days.

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

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