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Texas Instruments CY74FCT2245CTSOCE4

Name: CY74FCT2245CTSOCE4
Brand: Texas Instruments
SKU: CY74FCT2245CTSOCE4
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: CY74FCT2245CTSOCE4

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 20-SOIC (0.295", 7.50mm Width)

Datasheet:: CY74FCT2245CTSOCE4.pdf

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

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Product details

Overview

CY74FCT2245CTSOCE4 from Texas Instruments is an 8-bit noninverting bidirectional transceiver with 3-state outputs, designed for bus interface applications. It features 25-Ω output series resistors, I_off partial-power-down support, 12 mA sink / 15 mA source drive, and TTL-compatible logic levels. It operates at 4.75–5.25 V over –40°C to 85°C and replaces CY74FCT245T in existing designs.

For engineers reviewing the CY74FCT2245CTSOCE4 datasheet, CY74FCT2245CTSOCE4 pinout, CY74FCT2245CTSOCE4 application, or CY74FCT2245CTSOCE4 equivalent, key selection criteria include propagation delay (4.1 ns max), 3-state enable timing (t_PZH/t_PHZ ≤ 5.8 ns), bus noise suppression via on-chip termination, and compatibility with legacy FCT/F logic families.

Technical Context

The CY74FCT2245CTSOCE4 implements a dual-bus bidirectional transceiver architecture controlled by independent T/R (transmit/receive) and OE (output enable) inputs. Its edge-rate control circuitry limits slew rate to reduce transmission-line reflections, while integrated 25-Ω series output resistors dampen ringing without external components.

It supports partial-power-down operation via I_off protection, which disables outputs and blocks current backflow when V_CC = 0 V. The device maintains full TTL input threshold compatibility (V_IL ≤ 0.8 V, V_VIH ≥ 2.0 V) and delivers rail-to-rail output swing under load (V_OL ≤ 0.55 V at 12 mA, V_OH ≥ 2.4 V at –15 mA).

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	4.75–5.25 V - Ensures stable operation across industrial-grade power rails with ±5% tolerance.
Propagation Delay	1.5–4.1 ns - Enables high-speed data transfer between buses with minimal latency in synchronous systems.
Output Drive	12 mA sink / 15 mA source - Sufficient to drive standard TTL loads and multiple CMOS inputs without buffering.
3-State Enable Time	t_PZH/t_PHZ ≤ 5.8 ns - Allows rapid bus arbitration and fast switching between A- and B-side data paths.
I_off Current	±1 µA at V_CC = 0 V - Prevents damaging back-current during hot-insertion or partial system power-down.
ESD Protection	2000-V HBM, 200-V MM, 1000-V CDM - Meets JEDEC JESD22 standards for robust handling in manufacturing and field environments.
Input Thresholds	V_IL ≤ 0.8 V, V_IH ≥ 2.0 V - Guarantees interoperability with legacy TTL and mixed-voltage logic interfaces.

Pinout & Package

Package: SOIC-20 (DW), 7.5 mm × 12.8 mm body, 1.27 mm pitch, 2.65 mm max height per JEDEC MS-013.

Pin/Terminal	Circuit Role	Design Meaning
1 (T/R)	Direction Control Input	Active-high enables A→B data flow; active-low enables B→A - defines real-time bus direction without external logic.
2–9 (A0–A7)	Port A Bidirectional I/O	Connects to local bus or microcontroller data lines; electrically isolated when OE = high.
10 (GND)	Ground Reference	Primary return path for all I/O and supply currents; must be low-impedance for noise control.
11 (V_CC)	Power Supply	5-V nominal supply; decoupling capacitor required within 1 cm for stable high-speed switching.
12 (OE)	Output Enable Input	Active-high disables both A and B ports into high-impedance state - essential for bus sharing and conflict avoidance.
13–20 (B0–B7)	Port B Bidirectional I/O	Connects to peripheral or memory bus; mirrors A-port functionality with independent direction control.

Key Features

Feature	Design Value
On-chip 25-Ω series output resistors	Reduces signal reflection-induced noise on PCB traces up to 15 cm without external termination components.
Edge-rate control circuitry	Slows output transitions to limit di/dt, lowering EMI emissions and improving signal integrity in dense layouts.
I_off partial-power-down protection	Prevents reverse current flow when V_CC is unpowered, enabling safe hot-swap and multi-rail system integration.
TTL-compatible input thresholds	Accepts standard 0.8 V/2.0 V logic levels, eliminating level-shifter requirements in mixed-logic designs.
Function and pinout compatibility with FCT/F logic	Direct drop-in replacement for CY74FCT245T and similar transceivers - no PCB or firmware changes needed.

Applications

Industrial PLC Backplane Interface	Legacy Microcontroller Bus Expansion
Use Scenario: Interfacing a modern ARM-based controller to legacy 8-bit ISA-style peripheral cards via shared parallel bus. IC Role / Device Role / Timing Role: Bidirectional data bridge between CPU address/data bus and expansion slot, managed by T/R and OE signals synchronized to bus clock. Use Value: Eliminates need for discrete series resistors and level shifters while maintaining <4.1 ns propagation delay for cycle-accurate timing.	Use Scenario: Adding external SRAM or EPROM to an 8051-based embedded system with limited I/O pins. IC Role / Device Role / Timing Role: Isolates and buffers multiplexed AD0–AD7 lines during memory read/write cycles, controlled by WR/RD strobes mapped to OE/T/R. Use Value: Provides 12 mA sink capability to drive multiple memory chip inputs and suppresses ringing on 10+ cm trace runs.
Automotive Body Control Module Data Hub	Test Equipment Digital I/O Subsystem
Use Scenario: Aggregating sensor data from multiple LIN or discrete analog modules onto a central CAN gateway MCU. IC Role / Device Role / Timing Role: Transceiver for time-multiplexed diagnostic bus, enabling bidirectional firmware update and calibration data exchange. Use Value: I_off protection prevents backfeed during module power cycling; 2000-V HBM ESD rating ensures reliability in automotive assembly lines.	Use Scenario: Configurable digital pattern generator/analyzer channel interface supporting TTL/CMOS voltage standards. IC Role / Device Role / Timing Role: Reconfigurable bus driver/receiver for test head connections, with OE used for channel isolation and T/R for stimulus/response mode switching. Use Value: 4.1 ns max delay enables precise sub-250 MHz timing resolution; 3-state outputs prevent signal contention during multi-channel parallel testing.

Industrial PLC Backplane Interface

Legacy Microcontroller Bus Expansion

Use Scenario: Interfacing a modern ARM-based controller to legacy 8-bit ISA-style peripheral cards via shared parallel bus.

IC Role / Device Role / Timing Role: Bidirectional data bridge between CPU address/data bus and expansion slot, managed by T/R and OE signals synchronized to bus clock.

Use Value: Eliminates need for discrete series resistors and level shifters while maintaining <4.1 ns propagation delay for cycle-accurate timing.

Use Scenario: Adding external SRAM or EPROM to an 8051-based embedded system with limited I/O pins.

IC Role / Device Role / Timing Role: Isolates and buffers multiplexed AD0–AD7 lines during memory read/write cycles, controlled by WR/RD strobes mapped to OE/T/R.

Use Value: Provides 12 mA sink capability to drive multiple memory chip inputs and suppresses ringing on 10+ cm trace runs.

Automotive Body Control Module Data Hub

Test Equipment Digital I/O Subsystem

Use Scenario: Aggregating sensor data from multiple LIN or discrete analog modules onto a central CAN gateway MCU.

IC Role / Device Role / Timing Role: Transceiver for time-multiplexed diagnostic bus, enabling bidirectional firmware update and calibration data exchange.

Use Value: I_off protection prevents backfeed during module power cycling; 2000-V HBM ESD rating ensures reliability in automotive assembly lines.

Use Scenario: Configurable digital pattern generator/analyzer channel interface supporting TTL/CMOS voltage standards.

IC Role / Device Role / Timing Role: Reconfigurable bus driver/receiver for test head connections, with OE used for channel isolation and T/R for stimulus/response mode switching.

Use Value: 4.1 ns max delay enables precise sub-250 MHz timing resolution; 3-state outputs prevent signal contention during multi-channel parallel testing.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
CY74FCT2245ATSOCT	Slower 4.6 ns max propagation delay; identical pinout, package, and I/O specs.	Suitable for cost-sensitive designs where timing margin >500 ps is available.	Select when operating frequency ≤ 100 MHz and thermal budget allows higher ICCD.
SN74FCT245CTSOCE4	No on-chip 25-Ω resistors; requires external termination; otherwise functionally identical.	Used where board layout permits discrete termination or where lower output impedance is required.	Choose only if reflection control is handled externally and PCB space allows added components.

Compared with CY74FCT2245ATSOCT, the CY74FCT2245CTSOCE4 offers tighter timing for high-speed bus arbitration; compared with SN74FCT245CTSOCE4, it eliminates two external 25-Ω resistors per channel, reducing BOM count and layout complexity while improving signal fidelity.

Availability

CY74FCT2245CTSOCE4 is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive body control modules, legacy microcontroller bus expansion, and test equipment digital I/O subsystems requiring stable component supply and long-term obsolescence management.

Supply support for CY74FCT2245CTSOCE4 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 over 50 years of innovation in industrial, automotive, and communications markets.

The CY74FCT2245CTSOCE4 belongs to TI's FCT logic family, engineered for high-noise-immunity bus interfacing in mixed-signal systems where signal integrity, power-down safety, and TTL compatibility are critical design requirements.

FAQ

What is the maximum propagation delay of the CY74FCT2245CTSOCE4 at 5 V?

The CY74FCT2245CTSOCE4 has a maximum propagation delay of 4.1 ns (t_PLH/t_PHL) under recommended operating conditions (V_CC = 4.75–5.25 V, T_A = –40°C to 85°C). This value applies to both A→B and B→A data paths and is measured with 50-pF load and 1.5-V transition thresholds per TI datasheet SCCS037B.

Does the CY74FCT2245CTSOCE4 support partial-power-down operation?

Yes, the CY74FCT2245CTSOCE4 supports partial-power-down operation via its I_off circuitry. When V_CC = 0 V, the outputs are disabled and leakage current is limited to ±1 µA even with up to 4.5 V applied at I/O pins - preventing damaging back-current in hot-swap or multi-rail systems.

What package type and dimensions does the CY74FCT2245CTSOCE4 use?

The CY74FCT2245CTSOCE4 uses a SOIC-20 (DW) package: 7.5 mm × 12.8 mm body size, 2.65 mm maximum height, 1.27 mm lead pitch, and JEDEC MS-013 compliant footprint. Pin 1 is located in quadrant Q1 per tape-and-reel orientation standards.

How does the CY74FCT2245CTSOCE4 differ from the CY74FCT245T in terms of noise performance?

The CY74FCT2245CTSOCE4 integrates 25-Ω series output resistors and edge-rate control circuitry not present in the CY74FCT245T. These features reduce transmission-line reflection noise and EMI, allowing direct replacement in existing designs without adding external termination components.

Is the CY74FCT2245CTSOCE4 pin-compatible with other FCT-family transceivers?

Yes, the CY74FCT2245CTSOCE4 is functionally and pinout-compatible with CY74FCT245T and other FCT/F logic transceivers in SOIC-20 packaging. Its pin assignments (T/R, OE, A0–A7, B0–B7, V_CC, GND) match industry-standard 8-bit bidirectional transceiver layouts, enabling drop-in substitution.

CY74FCT2245CTSOCE4 Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74FCT

Package/Case:: 20-SOIC (0.295", 7.50mm 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:: 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-SOIC

CY74FCT2245CTSOCE4 FAQ

1.How can I place an order for CY74FCT2245CTSOCE4 through Aetrix?

Please submit a Request for Quotation (RFQ) for CY74FCT2245CTSOCE4 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 CY74FCT2245CTSOCE4 reliable?

The price and inventory of CY74FCT2245CTSOCE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT2245CTSOCE4 is usually 5 days.

3.What payment methods are accepted for CY74FCT2245CTSOCE4?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT2245CTSOCE4 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CY74FCT2245CTSOCE4?

CY74FCT2245CTSOCE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CY74FCT2245CTSOCE4 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 CY74FCT2245CTSOCE4?

For technical support, including CY74FCT2245CTSOCE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT2245CTSOCE4 requirements.

6.How does Aetrix verify that CY74FCT2245CTSOCE4 is sourced from the original manufacturer or authorized distributors?

All CY74FCT2245CTSOCE4 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 CY74FCT2245CTSOCE4 meets industry standards.

7.What is the process for return or replacement of CY74FCT2245CTSOCE4?

All CY74FCT2245CTSOCE4 units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT2245CTSOCE4, 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 CY74FCT2245CTSOCE4 part is unused and in its original packaging.

Return procedure for CY74FCT2245CTSOCE4:

1.Submit a request within 90 days.

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

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