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Texas Instruments CD74FCT245M96
- Part No.:
- CD74FCT245M96
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CD74FCT245M96.pdf
- Description:
- IC TXRX NON-INVERT 5.25V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:154
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Product details
Overview
CD74FCT245M96 from Texas Instruments is a BiCMOS octal bus transceiver with 3-state outputs, designed for bidirectional data flow between two 8-bit buses in 5-V digital systems. It features noninverted outputs, 64-mA sink capability per output, 3.7-V output voltage swing limit, and controlled edge rates to suppress EMI. It operates across 0°C to 70°C and is used in backplane interface, memory expansion, and system-level bus isolation applications.
For engineers reviewing the CD74FCT245M96 datasheet, CD74FCT245M96 pinout, CD74FCT245M96 application, or CD74FCT245M96 equivalent, key selection criteria include direction-control logic behavior, 3-state enable timing (ten = 1.5–9.5 ns), output current drive strength, VCC bounce mitigation via limited VOH, and SOIC-20 package compatibility with industrial PCB layouts.
Technical Context
The CD74FCT245M96 implements a dual-bus transceiver architecture with separate DIR (direction) and OE (output enable) control inputs. Its BiCMOS output stage combines bipolar pull-down and CMOS pull-up devices to clamp VOH at ~3.7 V (two diode drops below VCC), reducing power-bus ringing and ground bounce during simultaneous switching.
It supports bidirectional data transfer: when DIR = L and OE = L, B-bus data flows to A-bus; when DIR = H and OE = L, A-bus data flows to B-bus; OE = H forces all outputs into high-impedance state regardless of DIR. Input isolation from VCC and SCR latch-up resistance are built into the process design.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.75 V to 5.25 V - ensures stable operation under standard TTL/5-V logic rail tolerances. |
| Output Sink Current | 64 mA per pin - enables direct driving of heavy capacitive loads or multiple TTL inputs without external buffers. |
| Propagation Delay | 1.5 ns to 7 ns - supports high-speed bus handshaking in real-time control and data acquisition systems. |
| Output Voltage Swing | 0 V to 3.7 V - limits VCC overshoot and EMI generation during fast edge transitions. |
| Input Thresholds | VIL = 0.8 V, VIH = 2.0 V - compatible with TTL and 5-V CMOS logic families without level-shifting. |
| Power Dissipation Cap. | 49 pF - quantifies dynamic power consumption at 1 MHz, critical for thermal budgeting in dense layouts. |
| Operating Temperature | 0°C to 70°C - validated for commercial-grade embedded systems and industrial control panels. |
Pinout & Package
CD74FCT245M96 is housed in a 20-pin SOIC (DW) package with 1.27-mm pitch, 7.5-mm body width, and 2.65-mm maximum height - optimized for automated SMT assembly and space-constrained PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DIR) | Direction Control Input | Determines data flow direction: L = B→A, H = A→B; must be stable before OE activation. |
| 2–9 (A1–A8) | A-Bus Data Inputs/Outputs | Bidirectional I/O pins connected to A-side bus; high-impedance when OE = H. |
| 10 (GND) | Ground Reference | Primary return path for all internal logic and output currents; requires low-inductance PCB connection. |
| 11 (VCC) | Positive Supply | 5-V DC supply input; decoupling capacitor required within 1 cm to suppress switching noise. |
| 12–19 (B1–B8) | B-Bus Data Inputs/Outputs | Bidirectional I/O pins connected to B-side bus; isolated from A-bus when OE = H. |
| 20 (OE) | Output Enable Input | Active-low control: L enables transceiver, H places all A/B pins in high-Z state for bus isolation. |
Key Features
| Feature | Design Value |
|---|---|
| BiCMOS Output Architecture | Combines bipolar sink strength (64 mA) with CMOS input compatibility and low quiescent current. |
| Controlled Edge Rates | Reduces signal integrity issues like ground bounce and crosstalk in multi-channel parallel buses. |
| Input/Output Isolation from VCC | Prevents latch-up and false triggering during power sequencing or brownout conditions. |
| SCR Latch-Up Resistance | Guaranteed immunity to latch-up events per JEDEC JESD78, enabling robust operation in noisy environments. |
| 3-State Output Enable Timing | Enable/disable delays (ten/tdis = 1.5–9.5 ns) support precise bus arbitration in synchronous systems. |
Applications
| Backplane Bus Interface | Memory Expansion Module |
|---|---|
|
Use Scenario: Interfacing CPU local bus to peripheral backplane with multiple slot connectors. IC Role / Device Role / Timing Role: Bidirectional level-translating transceiver managing A/B bus handshaking under DIR/OE control. Use Value: 64-mA sink current drives long traces and multiple receivers; 3.7-V VOH minimizes EMI in densely routed chassis wiring. |
Use Scenario: Adding external SRAM or Flash to microcontroller-based industrial controller. IC Role / Device Role / Timing Role: Isolates memory address/data bus from main system bus during idle cycles using OE control. Use Value: High-speed propagation delay (≤7 ns) preserves setup/hold timing margins; SOIC-20 footprint fits compact module designs. |
| Industrial PLC I/O Subsystem | Digital Signal Acquisition System |
|
Use Scenario: Buffering sensor input data streams between field I/O modules and central processing unit. IC Role / Device Role / Timing Role: Direction-controlled data conduit synchronizing polled I/O reads/writes across isolated voltage domains. Use Value: Input isolation from VCC prevents fault propagation; latch-up resistance ensures reliability in electrically harsh factory floors. |
Use Scenario: Aggregating parallel ADC outputs into a shared data bus for FPGA preprocessing. IC Role / Device Role / Timing Role: Transient-isolated bus driver enabling hot-swap of acquisition channels without system reset. Use Value: Fast disable time (tdis ≤ 7.5 ns) eliminates bus contention during channel reconfiguration; 0°C–70°C rating matches industrial ambient range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74F245N | Same function but TTL-process; higher ICC (120 mA typical), no VOH clamping, slower tpd (10 ns max). | Lacks EMI suppression features; unsuitable where VCC bounce or radiated emissions must be minimized. | Choose only if legacy TTL compatibility is mandatory and board layout allows extra decoupling. |
| 74ACT245SCX | Advanced CMOS; rail-to-rail VOH/VOL, 24-mA drive, lower Cpd (25 pF), but no BiCMOS EMI control. | Higher speed margin but greater susceptibility to ground bounce on dense boards with simultaneous switching. | Prefer for low-power, high-frequency applications where EMI is managed elsewhere in the system. |
Compared with SN74F245N and 74ACT245SCX, the CD74FCT245M96 uniquely balances strong drive (64 mA), EMI-suppressing VOH clamping (3.7 V), and industrial temperature support - making it optimal for noise-sensitive, medium-speed bus isolation where reliability trumps raw speed.
Availability
CD74FCT245M96 is available at Aetrix Electronics and suitable for backplane interface, memory expansion, and industrial PLC subsystems requiring stable component supply, long-term manufacturability, and RoHS-compliant SOIC packaging.
Supply support for CD74FCT245M96 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 delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, scalability, and industrial-grade qualification.
The CD74FCT245M96 belongs to TI's FCT logic family - engineered for 5-V systems requiring low-noise bus interfacing, EMI control, and robust operation in commercial and light-industrial environments.
FAQ
What is the recommended power supply decoupling for CD74FCT245M96?
Place a 0.1-µF ceramic capacitor between VCC (pin 11) and GND (pin 10), located within 1 cm of the CD74FCT245M96 package. For systems with high simultaneous switching noise, add a 4.7-µF tantalum capacitor nearby. This ensures stable 5-V operation and suppresses VCC bounce caused by the CD74FCT245M96's 64-mA output transitions.
How does CD74FCT245M96 prevent bus contention during power-up?
The CD74FCT245M96 enters high-impedance state at power-up when OE is unasserted. To guarantee isolation, tie OE to VCC via a pullup resistor (minimum value determined by driver sink capability). This ensures the CD74FCT245M96 remains disabled until system control logic actively asserts OE = L, preventing unintended bus loading during boot sequences.
Can CD74FCT245M96 interface directly with 3.3-V logic devices?
No - CD74FCT245M96 is a 5-V-only device with VIH = 2.0 V and VIL = 0.8 V, but its outputs swing to 3.7 V (not 5 V), and inputs tolerate only 0–VCC. Direct connection to 3.3-V logic risks overvoltage damage or marginal noise margins. Use a level translator such as TXB0108 or discrete resistive divider when interfacing with CD74FCT245M96 in mixed-voltage systems.
What is the meaning of "SCR latch-up-resistant" in CD74FCT245M96 specifications?
"SCR latch-up-resistant" means the CD74FCT245M96 uses a BiCMOS process and circuit layout that prevents parasitic silicon-controlled rectifier (SCR) conduction paths from triggering during voltage transients or ESD events. This guarantees the CD74FCT245M96 will not enter destructive high-current latch-up mode - a critical reliability feature for industrial equipment exposed to electrical surges or rapid power cycling.
Is CD74FCT245M96 pin-compatible with CD74FCT245M?
Yes - CD74FCT245M96 and CD74FCT245M share identical SOIC-20 (DW) package dimensions, pinout, and electrical specifications. The "96" suffix denotes tape-and-reel packaging (2000 units/reel, MSL Level-1), while CD74FCT245M typically refers to tube-packaged variants. Both function identically in-circuit, and CD74FCT245M96 can replace CD74FCT245M without layout changes.
CD74FCT245M96 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74FCT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 15mA, 64mA
- Voltage - Supply:
- 4.75V ~ 5.25V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
CD74FCT245M96 FAQ
1.How can I place an order for CD74FCT245M96 through Aetrix?
Please submit a Request for Quotation (RFQ) for CD74FCT245M96 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 CD74FCT245M96 reliable?
The price and inventory of CD74FCT245M96 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CD74FCT245M96 is usually 5 days.
3.What payment methods are accepted for CD74FCT245M96?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CD74FCT245M96 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CD74FCT245M96?
CD74FCT245M96 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CD74FCT245M96 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 CD74FCT245M96?
For technical support, including CD74FCT245M96 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CD74FCT245M96 requirements.
6.How does Aetrix verify that CD74FCT245M96 is sourced from the original manufacturer or authorized distributors?
All CD74FCT245M96 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 CD74FCT245M96 meets industry standards.
7.What is the process for return or replacement of CD74FCT245M96?
All CD74FCT245M96 units undergo pre-shipment inspection (PSI). If there is an issue with CD74FCT245M96, 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 CD74FCT245M96 part is unused and in its original packaging.
Return procedure for CD74FCT245M96:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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