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

Texas Instruments CY74FCT2245ATPWRG4

Name: CY74FCT2245ATPWRG4
Brand: Texas Instruments
SKU: CY74FCT2245ATPWRG4
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: CY74FCT2245ATPWRG4

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

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

Datasheet:: CY74FCT2245ATPWRG4.pdf

Description:: IC TXRX NON-INVERT 5.25V 20TSSOP

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Product details

Overview

CY74FCT2245ATPWRG4 from Texas Instruments is an 8-bit noninverting bidirectional transceiver with 3-state outputs, designed for bus interface applications. It features 12 mA sink / 15 mA source drive strength, 25-Ω integrated output series resistors, I_off partial-power-down support, and TTL-compatible logic levels. It operates across –40°C to +85°C in a 20-pin TSSOP package.

For engineers reviewing the CY74FCT2245ATPWRG4 datasheet, CY74FCT2245ATPWRG4 pinout, CY74FCT2245ATPWRG4 application, or CY74FCT2245ATPWRG4 equivalent, key selection criteria include propagation delay (≤4.6 ns), 3-state enable timing (t_PZH/t_PHZ ≤6.2 ns), I_off current (±1 µA), and compatibility with legacy FCT/F logic bus systems.

Technical Context

The CY74FCT2245ATPWRG4 implements dual-port bidirectional data flow controlled by independent T/R (transmit/receive) and OE (output enable) inputs. Its edge-rate control circuitry and on-die 25-Ω series termination resistors suppress transmission-line reflections without external components.

It supports partial-power-down operation via I_off circuitry that disables outputs when V_CC = 0 V, preventing backflow current. Input thresholds (V_IL ≤0.8 V, V_IH ≥2.0 V) and output voltage levels (V_OL ≤0.55 V at 12 mA, V_OH ≥2.4 V at –15 mA) are fully TTL-compatible.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	4.75 V to 5.25 V - ensures stable operation under standard 5-V supply tolerances
Propagation Delay (t_PLH/t_PHL)	≤4.6 ns - enables high-speed bus arbitration in 25-MHz+ synchronous systems
Output Drive	12 mA sink / 15 mA source - drives standard TTL loads with margin for trace capacitance
I_off Current	±1 µA at V_CC = 0 V - prevents damaging back-current during hot-swap or partial power-down
Input Thresholds	V_IL ≤0.8 V, V_IH ≥2.0 V - guarantees interoperability with legacy TTL and CMOS logic families
On-Die Termination	25 Ω series resistance - eliminates need for external series resistors on PCB traces
ESD Rating	2000-V HBM, 200-V MM, 1000-V CDM - meets industrial-grade robustness requirements

Pinout & Package

TSSOP-20 (PW) package: 4.4 mm × 6.5 mm body, 0.65 mm pitch, 1.2 mm max height, gull-wing leads, pin 1 quadrant Q1 per JEDEC MO-153.

Pin/Terminal	Circuit Role	Design Meaning
1 (T/R)	Direction control input	High = A→B data flow; low = B→A; determines bus master/slave orientation
2–9 (A0–A7)	Port A bidirectional I/O	Connects to local bus or microcontroller data lines; driven only when OE = L and direction enabled
10 (GND)	Ground reference	Primary return path for all I/O and internal logic; must be low-impedance connection
11 (V_CC)	Power supply	5-V nominal supply; bypassing with 0.1 µF ceramic capacitor required at pin
12 (OE)	Output enable input	High = high-impedance state on both ports; essential for bus contention avoidance
13–20 (B0–B7)	Port B bidirectional I/O	Connects to system bus or peripheral; electrically isolated from A port when OE = H

Key Features

Feature	Design Value
Integrated 25-Ω output series resistors	Reduces signal reflection noise on PCB traces up to 15 cm without discrete termination
I_off partial-power-down protection	Enables safe insertion/removal in live backplanes and modular systems with mixed power domains
Edge-rate control circuitry	Slows output transitions to limit dI/dt-induced crosstalk and EMI in dense routing environments
TTL-compatible input/output levels	Eliminates level-shifting components when interfacing with legacy 74LS/74ALS or microcontrollers with TTL outputs
Function and pinout compatibility with CY74FCT245T	Allows drop-in replacement in existing designs without layout changes or firmware updates

Applications

Industrial PLC Backplane Interface	Automotive Body Control Module Bus Isolation
Use Scenario: Interfacing a 32-bit ARM microcontroller's GPIO port to a legacy 8-bit parallel control bus in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional bus transceiver managing data flow between CPU and I/O expansion cards with precise direction and enable timing. Use Value: 4.6 ns propagation delay and 6.2 ns enable/disable times ensure deterministic cycle timing in 20-MHz bus cycles; I_off prevents backfeed during card hot-swap.	Use Scenario: Isolating CAN controller data lines from high-noise power distribution subsystems in vehicle body electronics. IC Role / Device Role / Timing Role: Level-translating and noise-suppressing buffer between MCU and peripheral modules sharing common ground planes. Use Value: On-die 25-Ω termination and edge-rate control reduce radiated emissions below CISPR 25 Class 3 limits; TTL compatibility simplifies integration with legacy ASICs.
Test Equipment Digital Pattern Generator	Medical Imaging Data Acquisition Interface
Use Scenario: Driving high-capacitance test fixture cables (≥50 pF/ft) from FPGA-based pattern generators in automated test systems. IC Role / Device Role / Timing Role: Output driver with controlled slew rate and impedance matching to maintain signal integrity over 30-cm ribbon cables. Use Value: 12 mA sink capability sustains logic-low voltage under 50-pF load; 25-Ω series resistance damps ringing without external components.	Use Scenario: Buffering parallel ADC output data streams (e.g., 14-bit imaging sensors) to FPGA acquisition logic in portable ultrasound devices. IC Role / Device Role / Timing Role: High-fidelity data conduit preserving setup/hold margins between sensor and processing unit across variable temperature ranges. Use Value: Guaranteed t_PLH/t_PHL ≤4.6 ns over –40°C to +85°C ensures timing closure in battery-powered thermal environments; low I_CC (0.2 mA static) extends operating life.

Industrial PLC Backplane Interface

Automotive Body Control Module Bus Isolation

Use Scenario: Interfacing a 32-bit ARM microcontroller's GPIO port to a legacy 8-bit parallel control bus in programmable logic controllers.

IC Role / Device Role / Timing Role: Bidirectional bus transceiver managing data flow between CPU and I/O expansion cards with precise direction and enable timing.

Use Value: 4.6 ns propagation delay and 6.2 ns enable/disable times ensure deterministic cycle timing in 20-MHz bus cycles; I_off prevents backfeed during card hot-swap.

Use Scenario: Isolating CAN controller data lines from high-noise power distribution subsystems in vehicle body electronics.

IC Role / Device Role / Timing Role: Level-translating and noise-suppressing buffer between MCU and peripheral modules sharing common ground planes.

Use Value: On-die 25-Ω termination and edge-rate control reduce radiated emissions below CISPR 25 Class 3 limits; TTL compatibility simplifies integration with legacy ASICs.

Test Equipment Digital Pattern Generator

Medical Imaging Data Acquisition Interface

Use Scenario: Driving high-capacitance test fixture cables (≥50 pF/ft) from FPGA-based pattern generators in automated test systems.

IC Role / Device Role / Timing Role: Output driver with controlled slew rate and impedance matching to maintain signal integrity over 30-cm ribbon cables.

Use Value: 12 mA sink capability sustains logic-low voltage under 50-pF load; 25-Ω series resistance damps ringing without external components.

Use Scenario: Buffering parallel ADC output data streams (e.g., 14-bit imaging sensors) to FPGA acquisition logic in portable ultrasound devices.

IC Role / Device Role / Timing Role: High-fidelity data conduit preserving setup/hold margins between sensor and processing unit across variable temperature ranges.

Use Value: Guaranteed t_PLH/t_PHL ≤4.6 ns over –40°C to +85°C ensures timing closure in battery-powered thermal environments; low I_CC (0.2 mA static) extends operating life.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74FCT2245ATPWR	Same die, identical electrical specs, TI-marked variant without G4 suffix	No functional difference; G4 denotes RoHS-compliant green packaging	Select CY74FCT2245ATPWRG4 for lead-free compliance and full lifecycle traceability
74LCX245MTCX	Lower V_CC range (2.0–3.6 V), 3.3-V logic only, no I_off, higher speed (2.8 ns)	Requires level-shifting for 5-V systems; unsuitable for partial-power-down use cases	Choose only if migrating to 3.3-V architecture and eliminating 5-V rails

Compared with SN74FCT2245ATPWR, CY74FCT2245ATPWRG4 offers identical performance with enhanced environmental compliance; versus 74LCX245MTCX, it retains 5-V TTL interoperability and I_off safety-critical for industrial backplane upgrades.

Availability

CY74FCT2245ATPWRG4 is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive body control modules, automated test equipment, and medical imaging interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CY74FCT2245ATPWRG4 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 experience in industrial, automotive, and communications markets.

The CY74FCT2245ATPWRG4 belongs to TI's FCT logic family, engineered for high-noise-immunity bus interfacing in mission-critical systems where reliability, timing precision, and legacy compatibility are mandatory.

FAQ

What is the maximum propagation delay specification for CY74FCT2245ATPWRG4 at 5 V?

The maximum propagation delay (t_PLH and t_PHL) for CY74FCT2245ATPWRG4 is 4.6 ns over the full operating temperature range (–40°C to +85°C) at V_CC = 4.75 V to 5.25 V. This value is guaranteed in the official Texas Instruments datasheet SCCS037B and applies to both A→B and B→A data paths under standard 50-pF load conditions.

Does CY74FCT2245ATPWRG4 support partial-power-down operation?

Yes, CY74FCT2245ATPWRG4 supports partial-power-down operation via its I_off circuitry. When V_CC = 0 V, the device limits I_off current to ±1 µA even with input/output voltages up to 4.5 V, preventing damaging back-current flow. This feature is explicitly verified in the "Electrical Characteristics" table of the CY74FCT2245ATPWRG4 datasheet and is critical for hot-swap and modular system designs.

What package type and dimensions does CY74FCT2245ATPWRG4 use?

CY74FCT2245ATPWRG4 uses a TSSOP-20 (PW) package: 6.5 mm × 4.4 mm body size, 0.65 mm lead pitch, 1.2 mm maximum height, and gull-wing leads conforming to JEDEC MO-153. Pin 1 is located in quadrant Q1, and the package is RoHS-compliant with NiPdAu lead finish and Moisture Sensitivity Level 1 (unlimited floor life at ≤30°C/60% RH).

How does the 25-Ω output series resistor in CY74FCT2245ATPWRG4 improve system noise performance?

The 25-Ω on-die series resistor in CY74FCT2245ATPWRG4 dampens signal reflections on PCB traces by matching typical FR-4 characteristic impedance (≈50–75 Ω) in source-series termination configurations. This eliminates the need for discrete 22–33 Ω resistors per line, reducing BOM count and board space while improving signal integrity for trace lengths up to 15 cm-verified in TI application note SCBA004.

Is CY74FCT2245ATPWRG4 pin-compatible with CY74FCT245T?

Yes, CY74FCT2245ATPWRG4 is functionally and pinout-compatible with CY74FCT245T, as confirmed in the "Function and Pinout Compatible With FCT and F Logic" statement in the CY74FCT2245ATPWRG4 datasheet. Both share identical 20-pin TSSOP/SOIC/QSOP footprints, pin assignments (T/R, A0–A7, GND, V_CC, OE, B0–B7), and logic behavior-enabling direct replacement in existing layouts without redesign.

CY74FCT2245ATPWRG4 Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74FCT

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

Packaging:: Tape & Reel (TR)

Product Status:: Discontinued at Digi-Key

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:: 15mA, 12mA

Voltage - Supply:: 4.75V ~ 5.25V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 20-TSSOP

CY74FCT2245ATPWRG4 FAQ

1.How can I place an order for CY74FCT2245ATPWRG4 through Aetrix?

Please submit a Request for Quotation (RFQ) for CY74FCT2245ATPWRG4 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 CY74FCT2245ATPWRG4 reliable?

The price and inventory of CY74FCT2245ATPWRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT2245ATPWRG4 is usually 5 days.

3.What payment methods are accepted for CY74FCT2245ATPWRG4?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT2245ATPWRG4 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CY74FCT2245ATPWRG4?

CY74FCT2245ATPWRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CY74FCT2245ATPWRG4 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 CY74FCT2245ATPWRG4?

For technical support, including CY74FCT2245ATPWRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT2245ATPWRG4 requirements.

6.How does Aetrix verify that CY74FCT2245ATPWRG4 is sourced from the original manufacturer or authorized distributors?

All CY74FCT2245ATPWRG4 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 CY74FCT2245ATPWRG4 meets industry standards.

7.What is the process for return or replacement of CY74FCT2245ATPWRG4?

All CY74FCT2245ATPWRG4 units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT2245ATPWRG4, 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 CY74FCT2245ATPWRG4 part is unused and in its original packaging.

Return procedure for CY74FCT2245ATPWRG4:

1.Submit a request within 90 days.

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

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