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

onsemi 74ALVC2245MTC

Name: 74ALVC2245MTC
Brand: onsemi
SKU: 74ALVC2245MTC
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74ALVC2245MTC

Manufacturer:: onsemi

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 20-TSSOP (0.173", 4.40mm Width)

Datasheet:: 74ALVC2245MTC.pdf

Description:: IC TXRX NON-INVERT 3.6V 20TSSOP

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Product details

Overview

74ALVC2245MTC from Fairchild Semiconductor is a low-voltage bidirectional transceiver with 3-STATE outputs, designed for bus-oriented applications requiring direction control via T/R input and output enable via active-low OE. It operates from 1.65V to 3.6V V_CC, supports 3.6V-tolerant I/O, and integrates 26Ω series resistors on B-port outputs for noise reduction in memory address and clock driver circuits.

For engineers reviewing the 74ALVC2245MTC datasheet, pinout, applications, or equivalent options, key selection criteria include bidirectional data flow control, 3.6V I/O tolerance across 1.65–3.6V supply range, 26Ω B-port series termination, propagation delay ≤4.9 ns (3.0–3.6V), and TSSOP-20 package compatibility with JEDEC MO-153.

Technical Context

The 74ALVC2245MTC implements eight non-inverting bidirectional buffers with independent 3-STATE control per port, where OE disables both A and B sides simultaneously while T/R selects data direction (A→B or B→A). Its advanced CMOS process enables high-speed operation with low static power dissipation.

It features patented Quiet Series™ EMI/noise-reduction circuitry, power-off high-impedance I/O behavior, and compliance with JEDEC JED78 latchup standards. Input edge rate requirement is ≥10 ns/V (V_IN = 0.8–2.0V, V_CC = 3.0V), and it supports live insertion/withdrawal when OE is pulled up to V_CC.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	1.65V to 3.6V - Enables interoperability between 1.8V, 2.5V, and 3.3V logic domains without level shifters.
I/O Voltage Tolerance	Up to 3.6V - Allows safe connection to higher-voltage buses while powered from lower V_CC.
B-Port Series Resistance	26Ω - Reduces ringing and EMI in high-speed bus drivers like memory address lines and clock distribution.
t_PD (A→B)	≤4.9 ns at 3.0–3.6V - Supports >200 MHz bus timing margins in 3.3V systems.
t_PZH/t_PHZ	≤5.5 ns / ≤4.7 ns (3.0–3.6V) - Ensures fast, deterministic 3-STATE enable/disable for time-critical bus arbitration.
Input Leakage (I_I)	±5.0 µA max - Minimizes loading on driving sources and preserves signal integrity in high-impedance configurations.
ESD Rating	HBM ≥2000V - Provides robust handling during board assembly and system integration.

Pinout & Package

74ALVC2245MTC is housed in a 20-lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153 compliant, 4.4 mm wide, with 0.65 mm lead pitch and exposed pad not present. Pin numbering follows standard JEDEC TSSOP orientation (pin 1 marked).

Pin/Terminal	Circuit Role	Design Meaning
1 (OE)	Active-low Output Enable	Drives both A and B ports into high-impedance state when HIGH; requires pull-up to V_CC for safe power-up sequencing.
2 (T/R)	Data Direction Control	LOW routes B→A; HIGH routes A→B; must be stable before OE deassertion to avoid bus contention.
3–10 (A0–A7)	Side A Bidirectional I/O	Non-inverting buffer path; presents 6 pF input capacitance and supports 3.6V-tolerant signaling regardless of V_CC.
11 (GND)	Ground Reference	Primary return path for all internal logic and I/O current; must be low-inductance connection for noise control.
12–19 (B0–B7)	Side B Bidirectional I/O	Non-inverting path with integrated 26Ω series resistor per output - reduces slew-induced EMI in transmission-line environments.
20 (V_CC)	Power Supply	Supplies core logic and I/O drivers; bypassing with 0.1 µF ceramic capacitor near pin is mandatory for stable AC performance.

Key Features

Feature	Design Value
3.6V-tolerant I/O	Enables direct interfacing with legacy 3.3V/5V peripherals while operating from 1.8V supply - eliminates external level translators.
26Ω B-port series termination	Reduces signal reflections and radiated emissions on PCB traces longer than 1/6 wavelength - critical for clean clock and address bus operation.
Power-off high-impedance I/O	Prevents back-driving of powered-down subsystems - essential for hot-swap and modular backplane designs.
Quiet Series™ noise reduction	Patented internal slew-rate control minimizes simultaneous switching noise (SSN) - improves signal integrity in dense logic layouts.
Live insertion support	Guaranteed high-Z state during power ramp-up/down when OE is externally pulled to V_CC - enables field-replaceable module designs.

Applications

Memory Address Driver	Low-Voltage Clock Distribution
Use Scenario: Driving parallel address lines from a 1.8V microcontroller to a 3.3V SRAM or Flash device. IC Role / Device Role / Timing Role: Bidirectional transceiver translating voltage levels and managing bus direction during read/write cycles. Use Value: 3.6V I/O tolerance allows direct connection to 3.3V memory without level shifters; 26Ω B-port resistors suppress ringing on long address traces.	Use Scenario: Distributing a 1.8V system clock to multiple 3.3V peripheral ICs with matched trace lengths. IC Role / Device Role / Timing Role: Unidirectional clock buffer (T/R fixed HIGH) with controlled edge rates and low skew. Use Value: Quiet Series™ circuitry limits SSN; 26Ω B-port termination ensures clean clock edges even on unterminated stubs.
Hot-Swappable Backplane Interface	Multi-Voltage Bus Arbitration
Use Scenario: Interfacing a removable daughterboard (1.8V logic) to a mainboard (3.3V bus) in telecom line cards. IC Role / Device Role / Timing Role: Isolation and direction-controlled data bridge enabling safe insertion/removal under power. Use Value: Power-off high-Z behavior prevents bus contention; live insertion support meets NEBS GR-63-CORE requirements.	Use Scenario: Arbitrating shared data bus between 2.5V FPGA and 3.3V ASIC in industrial controller. IC Role / Device Role / Timing Role: Bidirectional bus transceiver with OE-gated access and T/R-controlled data flow direction. Use Value: 1.65–3.6V V_CC range accommodates both domains; 3.6V-tolerant I/O avoids voltage clamping diodes.

Memory Address Driver

Low-Voltage Clock Distribution

Use Scenario: Driving parallel address lines from a 1.8V microcontroller to a 3.3V SRAM or Flash device.

IC Role / Device Role / Timing Role: Bidirectional transceiver translating voltage levels and managing bus direction during read/write cycles.

Use Value: 3.6V I/O tolerance allows direct connection to 3.3V memory without level shifters; 26Ω B-port resistors suppress ringing on long address traces.

Use Scenario: Distributing a 1.8V system clock to multiple 3.3V peripheral ICs with matched trace lengths.

IC Role / Device Role / Timing Role: Unidirectional clock buffer (T/R fixed HIGH) with controlled edge rates and low skew.

Use Value: Quiet Series™ circuitry limits SSN; 26Ω B-port termination ensures clean clock edges even on unterminated stubs.

Hot-Swappable Backplane Interface

Multi-Voltage Bus Arbitration

Use Scenario: Interfacing a removable daughterboard (1.8V logic) to a mainboard (3.3V bus) in telecom line cards.

IC Role / Device Role / Timing Role: Isolation and direction-controlled data bridge enabling safe insertion/removal under power.

Use Value: Power-off high-Z behavior prevents bus contention; live insertion support meets NEBS GR-63-CORE requirements.

Use Scenario: Arbitrating shared data bus between 2.5V FPGA and 3.3V ASIC in industrial controller.

IC Role / Device Role / Timing Role: Bidirectional bus transceiver with OE-gated access and T/R-controlled data flow direction.

Use Value: 1.65–3.6V V_CC range accommodates both domains; 3.6V-tolerant I/O avoids voltage clamping diodes.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC2245APW	No integrated 26Ω resistors on B outputs; lower typical t_PD (3.8 ns @ 3.3V); same TSSOP-20 package.	Lacks built-in termination - requires external series resistors for EMI control in clock/address applications.	Select when external termination is preferred or when tighter propagation delay is required without B-port damping.
74AVC2245TTR	Higher speed (t_PD ≤2.8 ns @ 3.3V); 3.6V I/O tolerance retained; same 20-pin TSSOP but STMicro package variant.	Designed for sub-2ns edge rates - better suited for >300 MHz DDR control buses where 74ALVC2245MTC's 4.9 ns may limit margin.	Select for next-generation high-speed control buses where timing margin is critical and external termination is acceptable.

Compared with SN74LVC2245APW and 74AVC2245TTR, the 74ALVC2245MTC uniquely integrates 26Ω B-port series resistors for EMI suppression without layout overhead, making it optimal for cost-sensitive, noise-sensitive memory and clock driver roles where moderate speed suffices.

Availability

74ALVC2245MTC is available at Aetrix Electronics and suitable for memory address drivers, low-voltage clock distribution networks, and hot-swappable backplane interfaces requiring stable component supply, consistent parametric performance, and long-term industrial availability.

Supply support for 74ALVC2245MTC 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 communications infrastructure.

The ALVC (Advanced Low-Voltage CMOS) family, including the 74ALVC2245MTC, was engineered for low-power, high-noise-immunity bus interface applications in mixed-voltage systems - particularly targeting memory subsystems and programmable logic interconnects.

FAQ

What is the maximum operating temperature range for the 74ALVC2245MTC?

The 74ALVC2245MTC is specified for free-air operating temperatures from –40°C to +85°C. This industrial-grade range ensures reliable operation in embedded controllers, telecom equipment, and factory automation systems where ambient conditions exceed commercial limits. All DC and AC electrical characteristics in the datasheet are guaranteed across this full range.

Does the 74ALVC2245MTC require external pull-up resistors on OE and T/R inputs?

Yes - the 74ALVC2245MTC requires an external pull-up resistor on the OE pin to V_CC to ensure high-impedance state during power-up and power-down, as stated in Note 1 of the datasheet. T/R may be driven directly but must be stable before OE is deasserted. Typical pull-up values range from 4.7 kΩ to 10 kΩ depending on drive strength and noise immunity needs.

Can the 74ALVC2245MTC be used in a unidirectional configuration?

Yes - the 74ALVC2245MTC supports unidirectional operation by fixing the T/R input to either HIGH (A→B only) or LOW (B→A only) and controlling data flow using OE. In this mode, it functions as an octal buffer with 3-STATE outputs, retaining all benefits including 3.6V I/O tolerance and B-port 26Ω termination when used on the B side.

What is the purpose of the 26Ω series resistors on the B outputs of the 74ALVC2245MTC?

The 26Ω series resistors on the B outputs of the 74ALVC2245MTC reduce signal ringing and electromagnetic interference (EMI) by matching typical PCB trace impedances (~50Ω) in source-series terminated configurations. This design eliminates the need for discrete 22–33Ω resistors on B-side nets, simplifying layout and improving signal integrity in memory address and clock driver applications.

Is the 74ALVC2245MTC pin-compatible with the 74LVC2245 series?

No - while both share identical pinout (TSSOP-20, JEDEC MO-153), the 74ALVC2245MTC integrates 26Ω series resistors exclusively on B outputs, whereas standard 74LVC2245 variants do not. This functional difference affects signal integrity behavior and cannot be assumed interchangeable without verifying termination requirements in the target application.

74ALVC2245MTC Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: 74ALVC

Package/Case:: 20-TSSOP (0.173", 4.40mm Width)

Packaging:: Tube

Product Status:: Obsolete

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; 12mA, 12mA

Voltage - Supply:: 1.65V ~ 3.6V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 20-TSSOP

74ALVC2245MTC FAQ

1.How can I place an order for 74ALVC2245MTC through Aetrix?

Please submit a Request for Quotation (RFQ) for 74ALVC2245MTC 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 74ALVC2245MTC reliable?

The price and inventory of 74ALVC2245MTC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ALVC2245MTC is usually 5 days.

3.What payment methods are accepted for 74ALVC2245MTC?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ALVC2245MTC transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74ALVC2245MTC?

74ALVC2245MTC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74ALVC2245MTC 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 74ALVC2245MTC?

For technical support, including 74ALVC2245MTC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ALVC2245MTC requirements.

6.How does Aetrix verify that 74ALVC2245MTC is sourced from the original manufacturer or authorized distributors?

All 74ALVC2245MTC 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 74ALVC2245MTC meets industry standards.

7.What is the process for return or replacement of 74ALVC2245MTC?

All 74ALVC2245MTC units undergo pre-shipment inspection (PSI). If there is an issue with 74ALVC2245MTC, 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 74ALVC2245MTC part is unused and in its original packaging.

Return procedure for 74ALVC2245MTC:

1.Submit a request within 90 days.

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

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