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Texas Instruments CY54FCT245ATDMB
- Part No.:
- CY54FCT245ATDMB
- Manufacturer:
- Texas Instruments
- Package:
- 20-CDIP (0.300", 7.62mm)
- Datasheet:
-
CY54FCT245ATDMB.pdf
- Description:
- OCTAL BUS TRANSCEIVERS WITH 3-ST
- Quantity:
- Payment:
- Shipping:
Inventory:3,824
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Product details
Overview
CY54FCT245ATDMB from Texas Instruments is a military-grade 8-bit noninverting bidirectional transceiver with 3-state outputs, designed for bus-oriented data routing in high-reliability systems. It operates over –55°C to 125°C, delivers 48-mA sink / 12-mA source drive, features Ioff partial-power-down support, and uses edge-rate control for improved noise immunity in avionics and defense computing backplanes.
For engineers reviewing the CY54FCT245ATDMB datasheet, CY54FCT245ATDMB pinout, CY54FCT245ATDMB application, or CY54FCT245ATDMB equivalent, key selection criteria include its CDIP-20 package, –55°C to 125°C extended temperature range, 4.9 ns max propagation delay (tPLH/tPHL), Ioff-enabled power-down isolation, and TTL-compatible input/output logic levels.
Technical Context
The CY54FCT245ATDMB implements dual-bus bidirectional data flow controlled by independent T/R (transmit/receive) and OE (output enable) inputs. Its 3-state outputs are fully compatible with TTL logic families and support hot-swap-safe operation via Ioff circuitry that disables outputs when VCC = 0 V.
Edge-rate control circuitry ensures matched rise/fall times and significantly reduces switching noise, while the device meets MIL-PRF-38535 Class B requirements for radiation-hardened, high-reliability applications requiring stable timing and signal integrity under extreme thermal stress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - supports standard 5-V TTL/CMOS system rails with ±5% tolerance margin |
| Propagation Delay | Max 4.9 ns (tPLH/tPHL) - enables reliable operation in 100+ MHz bus systems with tight timing budgets |
| Output Drive | 48 mA sink / 12 mA source - drives heavy capacitive loads and multiple TTL inputs without external buffering |
| Operating Temperature | –55°C to 125°C - qualified for airborne, space, and ground vehicle mission-critical electronics |
| Ioff Support | ±1 µA max leakage at VCC = 0 V - prevents backflow current during partial power-down, protecting powered subsystems |
| ESD Protection | 2000-V HBM, 200-V MM, 1000-V CDM - exceeds JEDEC JESD22 standards for rugged handling in production and field environments |
Pinout & Package
Package: CDIP-20 (Ceramic Dual In-line Package), 20-pin, through-hole, hermetically sealed, RoHS-exempt (SnPb finish), MSL N/A.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | A0–A7 | Input/output port A - connects to local bus or microcontroller data lines; bidirectional when enabled |
| 11, 12, 13, 14, 15, 16, 17, 18 | B0–B7 | Input/output port B - interfaces with remote bus or peripheral; direction determined by T/R signal |
| 9 | GND | Ground reference - common return path for all signals and power; requires low-inductance connection |
| 10 | VCC | Positive supply - 5-V nominal rail; bypassing with 0.1 µF ceramic capacitor near pin is mandatory |
| 19 | T/R | Transmit/Receive control - high = A→B data flow; low = B→A data flow; level-sensitive, no internal pull-up/down |
| 20 | OE | Output Enable - active-low; high = both A and B ports forced to high-impedance state for bus isolation |
Key Features
| Feature | Design Value |
|---|---|
| Edge-rate controlled outputs | Reduces simultaneous switching noise (SSN) and EMI emissions in dense PCB layouts |
| Ioff partial-power-down | Enables safe insertion/removal of live backplane cards without disrupting adjacent powered modules |
| TTL-compatible logic levels | Accepts standard TTL VIH/VIL thresholds and drives TTL loads directly-no level-shifting required |
| Matched rise/fall times | Minimizes duty-cycle distortion on clocked or strobed data buses, preserving signal integrity |
| MIL-PRF-38535 compliance | Qualified for Class B high-reliability applications including aerospace, defense, and industrial control |
Applications
| Avionics Data Bus Interface | Defense System Backplane |
|---|---|
Use Scenario: Interfacing flight control computers with sensor acquisition modules across a shared ARINC 429 or custom parallel bus. IC Role / Device Role / Timing Role: Bidirectional data transceiver enabling time-critical command/response exchange between isolated subsystems. Use Value: Ioff protection prevents fault propagation during module hot-swap; 4.9 ns delay ensures deterministic latency for real-time control loops. | Use Scenario: Isolating processor and I/O modules on a ruggedized military backplane operating in wide-temperature environments. IC Role / Device Role / Timing Role: Bus buffer and direction controller managing data flow between CPU, memory, and peripheral cards. Use Value: CDIP-20 hermetic package and –55°C to 125°C rating ensure long-term reliability in uncontrolled environmental enclosures. |
| Spacecraft Onboard Computer | Industrial Process Controller |
Use Scenario: Routing telemetry and command data between radiation-tolerant FPGA and analog interface ASICs in LEO satellite payloads. IC Role / Device Role / Timing Role: Radiation-hardened transceiver providing galvanic isolation and bus contention prevention in multi-master configurations. Use Value: Edge-rate control suppresses radiated emissions critical for EMC compliance in compact satellite bays. | Use Scenario: Connecting PLC CPU modules to distributed I/O racks in oil & gas refineries where ambient temperatures exceed 85°C. IC Role / Device Role / Timing Role: High-drive bidirectional buffer supporting long trace runs and noisy industrial plant environments. Use Value: 48-mA sink capability maintains valid logic levels across 15-cm PCB traces with >50 pF load capacitance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY54FCT245CTLMB | LCC-20 ceramic package (FK), same electrical specs, identical –55°C to 125°C range | Suitable for surface-mount designs requiring hermetic sealing and lower profile than CDIP | Select when board space constraints or automated assembly favor SMT over through-hole mounting |
| CY74FCT245ATPC | Commercial-grade PDIP-20, –40°C to 85°C, SnPb or RoHS-compliant finish, 4.6 ns max delay | Intended for cost-sensitive industrial or test equipment where extended temperature is not required | Choose only for non-military, non-aerospace applications with standard commercial temp range and RoHS compliance needs |
Compared with CY54FCT245CTLMB, CY54FCT245ATDMB offers identical performance but in a through-hole CDIP package ideal for prototyping and high-vibration environments; versus CY74FCT245ATPC, it provides full military temperature qualification and enhanced reliability screening at higher cost and lead time.
Availability
CY54FCT245ATDMB is available at Aetrix Electronics and suitable for avionics data bus interface, defense system backplane, spacecraft onboard computer, and industrial process controller applications requiring stable component supply across extended temperature and long lifecycle support.
Supply support for CY54FCT245ATDMB 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 high-reliability components for aerospace, defense, and industrial markets.
The CY54FCT245ATDMB belongs to TI's military-grade FCT logic family, engineered for robust bus interfacing in mission-critical systems where extended temperature operation, radiation tolerance, and long-term supply stability are essential.
FAQ
What is the maximum propagation delay for CY54FCT245ATDMB?
The CY54FCT245ATDMB has a maximum propagation delay of 4.9 ns (tPLH/tPHL) under recommended operating conditions (VCC = 4.5 V to 5.5 V, TA = –55°C to 125°C). This value applies to both A→B and B→A data paths and ensures compatibility with high-speed synchronous bus architectures requiring sub-5-ns timing margins.
Does CY54FCT245ATDMB support partial power-down operation?
Yes, CY54FCT245ATDMB supports partial power-down via its Ioff circuitry. When VCC = 0 V, output leakage is limited to ±1 µA, preventing damaging current backflow from live buses into the unpowered device - a critical feature for hot-swap-capable avionics and defense backplanes.
What package type is used for CY54FCT245ATDMB?
CY54FCT245ATDMB uses a CDIP-20 (Ceramic Dual In-line Package) with 20 leads, hermetically sealed, SnPb lead finish, and no moisture sensitivity level (MSL N/A). It is designed for through-hole mounting and meets MIL-PRF-38535 Class B reliability requirements.
Is CY54FCT245ATDMB compatible with standard TTL logic levels?
Yes, CY54FCT245ATDMB is fully compatible with TTL input and output logic levels. It accepts VIH ≥ 2.0 V and VIL ≤ 0.8 V, and drives VOH ≥ 2.4 V (min) at IOH = –12 mA and VOL ≤ 0.55 V (max) at IOL = 48 mA - eliminating need for level translators in legacy 5-V TTL systems.
What is the operating temperature range of CY54FCT245ATDMB?
CY54FCT245ATDMB is rated for operation from –55°C to 125°C ambient temperature. This extended range is validated per MIL-PRF-38535 and makes it suitable for deployment in harsh environments such as aircraft engine bays, satellite payload compartments, and desert-deployed ground vehicles.
CY54FCT245ATDMB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 54FCT
- Package/Case:
- 20-CDIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- 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:
- 12mA, 48mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 20-CDIP
CY54FCT245ATDMB FAQ
1.How can I place an order for CY54FCT245ATDMB through Aetrix?
Please submit a Request for Quotation (RFQ) for CY54FCT245ATDMB 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 CY54FCT245ATDMB reliable?
The price and inventory of CY54FCT245ATDMB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY54FCT245ATDMB is usually 5 days.
3.What payment methods are accepted for CY54FCT245ATDMB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY54FCT245ATDMB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY54FCT245ATDMB?
CY54FCT245ATDMB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY54FCT245ATDMB 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 CY54FCT245ATDMB?
For technical support, including CY54FCT245ATDMB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY54FCT245ATDMB requirements.
6.How does Aetrix verify that CY54FCT245ATDMB is sourced from the original manufacturer or authorized distributors?
All CY54FCT245ATDMB 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 CY54FCT245ATDMB meets industry standards.
7.What is the process for return or replacement of CY54FCT245ATDMB?
All CY54FCT245ATDMB units undergo pre-shipment inspection (PSI). If there is an issue with CY54FCT245ATDMB, 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 CY54FCT245ATDMB part is unused and in its original packaging.
Return procedure for CY54FCT245ATDMB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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