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Texas Instruments CY54FCT541TLMB
- Part No.:
- CY54FCT541TLMB
- Manufacturer:
- Texas Instruments
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- -
- Datasheet:
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CY54FCT541TLMB.pdf
- Description:
- CY54FCT541T OCTAL BUFFERS AND LI
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Product details
Overview
CY54FCT541TLMB from Texas Instruments is a military-grade 8-bit noninverting buffer/line driver with 3-state outputs, designed for memory address and clock distribution in high-reliability systems operating from –55°C to 125°C. It delivers 48-mA sink / 12-mA source drive, features Ioff partial-power-down protection, edge-rate control for noise suppression, and TTL-compatible input/output logic levels.
For engineers reviewing the CY54FCT541TLMB datasheet, CY54FCT541TLMB pinout, CY54FCT541TLMB application, or CY54FCT541TLMB equivalent, key selection criteria include its MIL-PRF-38535 qualification, LCCC-20 package, 8 ns max propagation delay, 3.3 V typical VOH, and compatibility with legacy FCT/F logic families in avionics and defense subsystems.
Technical Context
The CY54FCT541TLMB implements dual 3-state enable inputs (OEA and OEB) controlling eight independent noninverting buffer channels, supporting bus-oriented transmitter/receiver operation with simultaneous or staggered output gating. Its Ioff circuitry actively disables outputs during power-down to prevent backflow current, meeting MIL-PRF-38535 requirements for partial-power-down mode.
Edge-rate control circuitry ensures matched rise/fall times and significantly improved noise immunity versus standard FCT devices. The device operates at VCC = 4.5–5.5 V, supports TTL/NMOS/CMOS interfacing without external components, and exhibits 0.2 V input hysteresis for noise rejection on control lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - Ensures stable operation across military-grade supply tolerances. |
| Output Sink Current | 48 mA per pin - Drives heavy capacitive loads and multiple TTL inputs without buffering. |
| Output Source Current | 12 mA per pin - Sufficient for driving CMOS and low-power TTL logic inputs. |
| Propagation Delay | 1.5 ns min / 8 ns max (D→O) - Enables high-speed timing-critical data paths in real-time systems. |
| Ioff Leakage | ±1 µA at VCC = 0 V - Prevents damaging backfeed current during hot-swap or partial-power-down sequences. |
| Operating Temperature | –55°C to +125°C - Qualified for extended-range deployment in aerospace, defense, and downhole applications. |
| ESD Protection | 2000-V HBM, 200-V MM, 1000-V CDM - Meets JESD22 standards for robust handling in manufacturing and field environments. |
Pinout & Package
LCCC-20 (FK) ceramic leadless chip carrier package with 20 terminals, hermetically sealed, suitable for high-reliability PCB mounting and conformal coating. Pin 1 identified by corner notch; no leads extend beyond body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | Data Inputs (D0–D7) | Noninverting input signals routed to corresponding outputs when enabled. |
| 9 | GND | Ground reference for all internal circuitry and output drivers. |
| 10 | VCC | Positive supply rail (4.5–5.5 V); decoupling capacitor required adjacent to pin. |
| 11, 20 | OEA, OEB | Active-low 3-state enable controls; either enables all eight outputs (logic low), both must be high for high-impedance state. |
| 12–19 | Outputs (O0–O7) | Buffered, noninverting replicas of D0–D7; tri-stated when OEA and OEB are high. |
Key Features
| Feature | Design Value |
|---|---|
| Edge-Rate Control | Reduces simultaneous switching noise (SSN) and EMI emissions without external damping components. |
| Ioff Partial-Power-Down | Enables safe insertion/removal in live backplanes by disabling outputs when VCC = 0 V. |
| TTL-Compatible Logic Levels | Direct interface with legacy TTL, NMOS, and CMOS without level-shifting circuitry. |
| MIL-PRF-38535 Qualification | Full screening per Class B or S requirements, including temperature cycling, burn-in, and parametric testing. |
| Matched Rise/Fall Times | Minimizes duty-cycle distortion in clock distribution networks and reduces signal integrity issues. |
Applications
| Aerospace Data Bus Interface | Defense System Clock Distribution |
|---|---|
Use Scenario: Interfacing flight computer address/data buses with radiation-hardened memory modules in satellite payload controllers. IC Role / Device Role / Timing Role: Bidirectional 3-state buffer isolating CPU address lines from memory array, enabling shared bus arbitration under fault conditions. Use Value: Ioff protection prevents latch-up during power sequencing mismatches; 8 ns propagation delay maintains timing margin in 20 MHz bus cycles. |
Use Scenario: Distributing synchronized clock signals across radar processor boards in airborne electronic warfare suites. IC Role / Device Role / Timing Role: Low-skew, noninverting clock driver replicating master oscillator output to multiple FPGA and ADC clock inputs. Use Value: Matched rise/fall times and edge-rate control suppress jitter accumulation across 8 parallel paths, preserving <100 ps inter-channel skew. |
| Avionics Sensor Signal Conditioning | Tactical Radio Baseband Processing |
Use Scenario: Buffering analog-to-digital converter output data streams before transmission to mission computers via ARINC 429 interfaces. IC Role / Device Role / Timing Role: High-drive data latch driver translating CMOS-level ADC outputs to robust TTL-compatible bus signals. Use Value: 48-mA sink capability drives long traces and multiple receiver inputs while maintaining VIH/VIL margins over full temperature range. |
Use Scenario: Isolating baseband digital signal processors from RF front-end control lines in software-defined radios deployed in ground vehicles. IC Role / Device Role / Timing Role: 3-state bus transceiver managing bidirectional configuration register access between DSP and RFIC. Use Value: Dual enable pins (OEA/OEB) allow independent control of read/write directions without additional logic, reducing PCB routing complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit noninverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY74FCT541TDMB | Commercial temperature grade (–40°C to 85°C); same LCCC-20 package and pinout. | Not qualified to MIL-PRF-38535; lacks extended temperature screening and burn-in. | Select when cost-sensitive industrial designs require identical form/fit/function without military reliability requirements. |
| CY74FCT541TSOCT | SOIC-20 package; 4.8 ns max tPLH/tPHL; RoHS-compliant NiPdAu finish. | Lower thermal resistance (58°C/W vs. ~100°C/W for LCCC); not hermetic or radiation-tolerant. | Choose for commercial avionics upgrades where board space and reflow compatibility outweigh hermeticity needs. |
Compared with CY54FCT541TLMB, CY74FCT541TDMB offers identical packaging but reduced environmental qualification, while CY74FCT541TSOCT trades hermetic sealing and temperature range for surface-mount manufacturability and lower thermal impedance-neither is a drop-in replacement for MIL-spec deployments requiring full screening.
Availability
CY54FCT541TLMB is available at Aetrix Electronics and suitable for aerospace data bus interface, defense system clock distribution, and avionics sensor signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CY54FCT541TLMB 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 logic solutions, with decades of heritage in military and aerospace component development.
CY54FCT541TLMB belongs to TI's FCT logic family, engineered for high-speed, low-noise, TTL-compatible buffering in mission-critical systems where reliability, timing precision, and environmental resilience are mandatory.
FAQ
What is the maximum operating temperature range for the CY54FCT541TLMB?
The CY54FCT541TLMB is rated for operation from –55°C to +125°C, fully compliant with MIL-PRF-38535 Class B or S screening requirements. This extended range supports deployment in jet engine bays, satellite payloads, and other thermally demanding environments where commercial-grade buffers would fail.
Does the CY54FCT541TLMB support partial-power-down functionality?
Yes, the CY54FCT541TLMB integrates Ioff circuitry that disables all outputs when VCC = 0 V, limiting leakage current to ±1 µA. This feature enables safe hot-swap operation and prevents damaging backflow current in partially powered systems-a critical requirement in modular avionics architectures using CY54FCT541TLMB.
What package type is used for the CY54FCT541TLMB?
The CY54FCT541TLMB uses a 20-terminal LCCC (Leadless Chip Carrier) package with FK drawing, constructed from ceramic material and hermetically sealed. It is marked "5962-9223701M2A" and "CY54FCT541TLMB", and requires solder reflow profiles compatible with ceramic substrates and gold metallization.
How does the CY54FCT541TLMB differ from the CY74FCT541T series in drive strength?
The CY54FCT541TLMB provides 48-mA sink and 12-mA source output current, matching the "A" speed grade of the CY74FCT541T family. In contrast, the CY74FCT541T "C" grade offers higher drive (64-mA sink / 32-mA source) but is not offered in the LCCC-20 military package variant used by CY54FCT541TLMB.
Is the CY54FCT541TLMB pin-compatible with standard FCT logic devices?
Yes, the CY54FCT541TLMB is functionally, pinout-, and drive-compatible with industry-standard FCT and F logic families. Its pin assignments (D0–D7, O0–O7, OEA, OEB, VCC, GND) match JEDEC-standard 20-pin buffer layouts, enabling direct substitution in legacy designs originally using CY74FCT541T variants in LCCC or CDIP packages.
CY54FCT541TLMB 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:
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- Supplier Device Package:
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CY54FCT541TLMB FAQ
1.How can I place an order for CY54FCT541TLMB through Aetrix?
Please submit a Request for Quotation (RFQ) for CY54FCT541TLMB 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 CY54FCT541TLMB reliable?
The price and inventory of CY54FCT541TLMB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY54FCT541TLMB is usually 5 days.
3.What payment methods are accepted for CY54FCT541TLMB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY54FCT541TLMB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY54FCT541TLMB?
CY54FCT541TLMB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY54FCT541TLMB 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 CY54FCT541TLMB?
For technical support, including CY54FCT541TLMB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY54FCT541TLMB requirements.
6.How does Aetrix verify that CY54FCT541TLMB is sourced from the original manufacturer or authorized distributors?
All CY54FCT541TLMB 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 CY54FCT541TLMB meets industry standards.
7.What is the process for return or replacement of CY54FCT541TLMB?
All CY54FCT541TLMB units undergo pre-shipment inspection (PSI). If there is an issue with CY54FCT541TLMB, 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 CY54FCT541TLMB part is unused and in its original packaging.
Return procedure for CY54FCT541TLMB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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