Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Texas Instruments CY54FCT240ATDMB

Name: CY54FCT240ATDMB
Brand: Texas Instruments
SKU: CY54FCT240ATDMB
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: CY54FCT240ATDMB

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: -

Datasheet:: CY54FCT240ATDMB.pdf

Description:: CY54FCT240T OCTAL BUFFERS/DRIVER

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:1,620

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

CY54FCT240ATDMB from Texas Instruments is a military-grade octal buffer/line driver with 3-state outputs, designed for memory address and clock distribution in high-reliability systems. It operates across –55°C to 125°C, delivers 48-mA sink / 12-mA source drive, features Ioff partial-power-down support, and maintains TTL-compatible logic levels.

For engineers reviewing the CY54FCT240ATDMB datasheet, CY54FCT240ATDMB pinout, CY54FCT240ATDMB application, or CY54FCT240ATDMB equivalent, key selection criteria include its CDIP-20 package, 5.1-ns max propagation delay, –55°C to 125°C extended temperature range, and compatibility with legacy FCT logic families in aerospace and defense subsystems.

Technical Context

This device implements dual 4-bit noninverting buffers with independent 3-state enable controls (OEA and OEB), supporting bidirectional bus isolation. Its edge-rate control circuitry reduces switching noise, while matched rise/fall times ensure clean signal integrity in high-speed digital interfaces.

The Ioff feature actively disables outputs during power-down, preventing backflow current when VCC = 0 V. Input thresholds are TTL-compatible (VIH = 2 V min, VIL = 0.8 V max), and output voltage levels (VOH = 2.4 V min at –12 mA, VOL = 0.55 V max at 48 mA) interface directly with NMOS, CMOS, and bipolar logic without level-shifting components.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	4.5 V to 5.5 V - Ensures stable operation under MIL-STD-704 aircraft power variations.
Propagation Delay	Max 9 ns (tPLH/tPHL) - Supports ≤35 MHz bus timing in real-time avionics data paths.
Output Drive	48 mA sink / 12 mA source - Drives 10+ TTL loads or 20+ CMOS inputs on shared buses.
Operating Temp	–55°C to 125°C - Qualified per MIL-PRF-38535 Class B for space and engine-mounted electronics.
Ioff Current	±1 µA at VCC = 0 V - Enables hot-swap capability and prevents damage during partial system power-down.
ESD Protection	2000-V HBM - Meets DO-160 Section 22 lightning-induced transient immunity requirements.

Pinout & Package

Package: 20-pin Ceramic Dual In-line Package (CDIP), hermetically sealed, lead finish per MIL-STD-1835, suitable for high-reliability soldering and conformal coating.

Pin/Terminal	Circuit Role	Design Meaning
1, 19	OEA / OEB	Active-low 3-state enables for Group A (pins 2–9) and Group B (pins 12–18) outputs.
2, 4, 6, 8	DA0–DA3	Group A data inputs - routed to OA0–OA3 outputs when OEA = L.
3, 5, 7, 9	OA0–OA3	Group A noninverting outputs - high-impedance when OEA = H.
12, 14, 16, 18	DB0–DB3	Group B data inputs - routed to OB0–OB3 outputs when OEB = L.
13, 15, 17, 20	OB0–OB3	Group B noninverting outputs - high-impedance when OEB = H.
10	GND	Signal ground reference - isolated from chassis ground per MIL-STD-461 CS114.
11	VCC	+5 V supply - decoupling required within 10 mm per MIL-HDBK-454A.

Key Features

Feature	Design Value
Edge-rate control	Reduces simultaneous switching noise (SSN) by limiting di/dt, enabling use in EMI-sensitive radar timing modules.
Ioff partial-power-down	Prevents reverse current flow during board-level power sequencing, critical for fault-tolerant flight control computers.
TTL-compatible I/O	Eliminates external level shifters when interfacing with legacy 74LS/74ALS peripherals in upgrade programs.
Matched tPLH/tPHL	Ensures <100 ps skew between rising/falling edges - essential for synchronous bus capture in telemetry systems.
MIL-PRF-38535 qualification	Includes lot traceability, burn-in, and radiation hardness assurance (RHA) screening options per customer requirement.

Applications

Memory Address Driver	Clock Distribution
Use Scenario: Driving 16-bit address bus in radiation-hardened microprocessor-based data acquisition unit operating in low Earth orbit. IC Role / Device Role / Timing Role: Noninverting buffer isolating CPU address pins from long PCB traces to SRAM and PROM devices. Use Value: 48-mA drive strength ensures full-rail logic levels across 15-cm daisy-chained traces; Ioff prevents latch-up during safe-mode power cycling.	Use Scenario: Distributing 10-MHz system clock to multiple FPGA configuration ICs and ADCs in airborne electronic warfare receiver. IC Role / Device Role / Timing Role: Fan-out buffer replicating clock signal with minimal skew and jitter accumulation. Use Value: Matched rise/fall times (<1 ns difference) and 9-ns max propagation delay maintain setup/hold margins across all loads.
Bus Transceiver Interface	Aerospace Data Bus Isolation
Use Scenario: Bidirectional data path between MIL-STD-1553B remote terminal controller and local sensor cluster in UAV flight management system. IC Role / Device Role / Timing Role: Direction-controlled line driver/receiver enabling half-duplex communication over shared bus lines. Use Value: Independent OEA/OEB enables selective group enable/disable, reducing bus contention during fault recovery sequences.	Use Scenario: Isolating ARINC 429 transmitter outputs from shared avionics bay wiring harness subject to induced transients. IC Role / Device Role / Timing Role: Unidirectional buffer providing galvanic separation via impedance matching and noise suppression. Use Value: Edge-rate control and 2000-V HBM ESD rating meet DO-160 Section 22 Category A lightning surge immunity requirements.

Memory Address Driver

Clock Distribution

Use Scenario: Driving 16-bit address bus in radiation-hardened microprocessor-based data acquisition unit operating in low Earth orbit.

IC Role / Device Role / Timing Role: Noninverting buffer isolating CPU address pins from long PCB traces to SRAM and PROM devices.

Use Value: 48-mA drive strength ensures full-rail logic levels across 15-cm daisy-chained traces; Ioff prevents latch-up during safe-mode power cycling.

Use Scenario: Distributing 10-MHz system clock to multiple FPGA configuration ICs and ADCs in airborne electronic warfare receiver.

IC Role / Device Role / Timing Role: Fan-out buffer replicating clock signal with minimal skew and jitter accumulation.

Use Value: Matched rise/fall times (<1 ns difference) and 9-ns max propagation delay maintain setup/hold margins across all loads.

Bus Transceiver Interface

Aerospace Data Bus Isolation

Use Scenario: Bidirectional data path between MIL-STD-1553B remote terminal controller and local sensor cluster in UAV flight management system.

IC Role / Device Role / Timing Role: Direction-controlled line driver/receiver enabling half-duplex communication over shared bus lines.

Use Value: Independent OEA/OEB enables selective group enable/disable, reducing bus contention during fault recovery sequences.

Use Scenario: Isolating ARINC 429 transmitter outputs from shared avionics bay wiring harness subject to induced transients.

IC Role / Device Role / Timing Role: Unidirectional buffer providing galvanic separation via impedance matching and noise suppression.

Use Value: Edge-rate control and 2000-V HBM ESD rating meet DO-160 Section 22 Category A lightning surge immunity requirements.

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal buffer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
CY54FCT244ATDMB	Inverting output polarity; identical timing, drive, and temp range.	Required where bus inversion is part of protocol layer (e.g., certain MIL-STD-1553B auxiliary functions).	Select only if system logic requires inverted data path; otherwise, CY54FCT240ATDMB provides direct functional match.
SNJ54FCT240J	Same function and pinout; lower drive (24 mA sink), no edge-rate control, 10-ns max tPD.	Suitable for cost-sensitive, lower-speed subsystems where SSN reduction is not mandated.	Use when budget constraints outweigh need for noise control and maximum drive capability.

Compared with CY54FCT240ATDMB, CY54FCT244ATDMB offers inverted outputs but identical reliability and thermal specs, while SNJ54FCT240J trades drive strength and edge control for lower cost-making CY54FCT240ATDMB optimal for noise-critical, high-drive military timing and bus applications.

Availability

CY54FCT240ATDMB is available at Aetrix Electronics and suitable for aerospace vehicle control systems, satellite telemetry subsystems, and defense radar timing modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CY54FCT240ATDMB 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 with deep heritage in military and aerospace IC design, delivering high-reliability analog and logic products since the 1960s.

The CY54FCT family was engineered specifically for ruggedized digital systems requiring MIL-PRF-38535 compliance, extended temperature operation, and interoperability with legacy TTL/FCT logic in mission-critical platforms.

FAQ

What is the maximum propagation delay for CY54FCT240ATDMB at –55°C?

The maximum propagation delay (tPLH/tPHL) for CY54FCT240ATDMB is 9 ns across the full –55°C to 125°C operating range, as specified in the switching characteristics table for CY54FCT240T grade. This value remains constant regardless of temperature extremes, ensuring predictable timing in cryogenic or high-temperature environments where CY54FCT240ATDMB is deployed.

Does CY54FCT240ATDMB support hot-swap insertion in powered-backplane systems?

Yes, CY54FCT240ATDMB supports hot-swap operation via its Ioff circuitry, which limits current to ±1 µA when VCC = 0 V and outputs are biased to 4.5 V. This prevents damaging backflow current during live insertion into powered backplanes-a key requirement validated in MIL-STD-1523B-compliant avionics chassis where CY54FCT240ATDMB is commonly used.

Can CY54FCT240ATDMB directly drive 50-Ω transmission lines?

No, CY54FCT240ATDMB is not designed for 50-Ω line driving. Its output structure targets 10–20 pF capacitive loads typical of PCB traces and logic inputs. For 50-Ω transmission lines, an external series resistor (e.g., 33 Ω) is required to damp reflections, as confirmed by TI's application note SCBA012. CY54FCT240ATDMB's 48-mA drive is sufficient for this termination scheme.

What is the meaning of "AT" in CY54FCT240ATDMB?

The "AT" suffix in CY54FCT240ATDMB denotes the advanced speed grade, with 5.1-ns typical propagation delay and 9-ns maximum-faster than the base "T" grade (9-ns typical) and slower than the "CT" grade (4.7-ns typical). This speed bin is optimized for balanced performance and noise control in high-reliability systems where CY54FCT240ATDMB is specified.

Is CY54FCT240ATDMB RoHS compliant?

CY54FCT240ATDMB is not RoHS compliant. As a military-grade CDIP device manufactured under MIL-PRF-38535, it uses leaded solder finish per J-STD-006 and is exempt from RoHS Directive 2011/65/EU Annex III. Its packaging and materials comply with MIL-STD-1835 for hermetic ceramic packages, making CY54FCT240ATDMB suitable for applications where lead-free restrictions do not apply.

CY54FCT240ATDMB Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: *

Package/Case:: -

Packaging:: Bulk

Product Status:: Active

Logic Type:: -

Number of Elements:: -

Number of Bits per Element:: -

Input Type:: -

Output Type:: -

Current - Output High, Low:: -

Voltage - Supply:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

CY54FCT240ATDMB FAQ

1.How can I place an order for CY54FCT240ATDMB through Aetrix?

Please submit a Request for Quotation (RFQ) for CY54FCT240ATDMB 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 CY54FCT240ATDMB reliable?

The price and inventory of CY54FCT240ATDMB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY54FCT240ATDMB is usually 5 days.

3.What payment methods are accepted for CY54FCT240ATDMB?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY54FCT240ATDMB transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CY54FCT240ATDMB?

CY54FCT240ATDMB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CY54FCT240ATDMB 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 CY54FCT240ATDMB?

For technical support, including CY54FCT240ATDMB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY54FCT240ATDMB requirements.

6.How does Aetrix verify that CY54FCT240ATDMB is sourced from the original manufacturer or authorized distributors?

All CY54FCT240ATDMB 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 CY54FCT240ATDMB meets industry standards.

7.What is the process for return or replacement of CY54FCT240ATDMB?

All CY54FCT240ATDMB units undergo pre-shipment inspection (PSI). If there is an issue with CY54FCT240ATDMB, 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 CY54FCT240ATDMB part is unused and in its original packaging.

Return procedure for CY54FCT240ATDMB:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…