My Inquiry
My Account
Texas Instruments CY74FCT2245TSOCTE4
- Part No.:
- CY74FCT2245TSOCTE4
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CY74FCT2245TSOCTE4.pdf
- Description:
- IC TXRX NON-INVERT 5.25V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,338
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CY74FCT2245TSOCTE4 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, Ioff partial-power-down support, TTL-compatible logic levels, 12 mA sink / 15 mA source drive, and 7.0 ns max propagation delay. It operates across –40°C to 85°C in SOIC-20 package for industrial data bus isolation.
For engineers reviewing the CY74FCT2245TSOCTE4 datasheet, CY74FCT2245TSOCTE4 pinout, CY74FCT2245TSOCTE4 application, or CY74FCT2245TSOCTE4 equivalent, key selection criteria include bidirectional bus direction control (T/R), simultaneous 3-state enable (OE), integrated output termination, Ioff protection during power sequencing, and SOIC-20 footprint compatibility with legacy FCT-family designs.
Technical Context
The CY74FCT2245TSOCTE4 implements dual-port bidirectional data flow controlled by a single active-high T/R signal: high enables A→B transmission, low enables B→A reception. Its OE input independently places both A and B ports into high-impedance state when asserted high.
Edge-rate control circuitry and on-die 20–40 Ω output series resistance suppress transmission-line reflections without external components. The Ioff feature disables outputs and blocks current backflow when VCC = 0 V, enabling safe hot-insertion and partial-power-down system architectures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.75 V to 5.25 V - Ensures stable operation under standard 5-V TTL/CMOS supply rails with ±5% tolerance. |
| Propagation Delay (tPLH/tPHL) | 1.5 ns (min) to 7.0 ns (max) - Supports high-speed bus timing up to ~140 MHz clock-equivalent data rates. |
| Output Drive | 12 mA sink / 15 mA source - Drives standard TTL loads and 50-pF transmission lines without external buffers. |
| Input Thresholds | VIL ≤ 0.8 V, VIH ≥ 2.0 V - Fully compatible with TTL input logic levels and robust noise margin. |
| Output Termination | 20–40 Ω series resistance - Reduces signal overshoot/ringing on PCB traces, eliminating need for discrete series resistors. |
| Ioff Leakage | ±1 µA at VCC = 0 V - Prevents damaging back-current during power-down sequences in mixed-voltage systems. |
| ESD Protection | 2000-V HBM, 200-V MM, 1000-V CDM - Meets industrial-grade ESD immunity requirements per JESD22. |
Pinout & Package
SOIC-20 package (DW), 7.5 mm × 12.8 mm body, 1.27 mm pitch, 2.65 mm max height, RoHS-compliant NiPdAu lead finish, MSL Level-1 (260°C reflow unlimited).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (T/R) | Transmit/Receive Control | Active-high: A→B data flow; active-low: B→A data flow - determines real-time bus direction. |
| 2–9 (A0–A7) | Port A Bidirectional I/O | Connects to local bus or microcontroller side; driven or sensed depending on T/R state. |
| 10 (GND) | Ground Reference | Primary return path for all I/O and internal logic; must be low-impedance connection. |
| 11 (VCC) | Power Supply | 5-V nominal supply; decoupling capacitor required within 1 cm of pin for noise suppression. |
| 12 (OE) | Output Enable | Active-low enable; high forces A/B ports into high-Z - used for bus arbitration and isolation. |
| 13–20 (B0–B7) | Port B Bidirectional I/O | Connects to peripheral or memory bus side; mirrors A-port behavior under T/R control. |
Key Features
| Feature | Design Value |
|---|---|
| On-die 25-Ω output series resistance | Reduces signal reflection-induced noise on PCB traces without requiring external termination resistors. |
| Ioff partial-power-down protection | Prevents reverse current flow when VCC is unpowered, enabling safe hot-swap and multi-rail power sequencing. |
| TTL-compatible input and output thresholds | Interoperates directly with legacy 5-V TTL logic families without level-shifting circuitry. |
| Edge-rate controlled outputs | Minimizes simultaneous switching noise (SSN) and EMI emissions during high-speed bus transitions. |
| Function- and pin-compatible with CY74FCT245T | Enables drop-in replacement in existing designs where enhanced noise performance is required. |
Applications
| Industrial PLC Backplane Interface | Legacy Microcontroller Bus Extension |
|---|---|
Use Scenario: Isolating CPU address/data bus from modular I/O expansion cards in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional bus transceiver managing data flow between master controller and slave modules via shared backplane. Use Value: Integrated 25-Ω termination eliminates stub reflections on 10+ cm backplane traces, improving signal integrity at 20-MHz bus clock rates. | Use Scenario: Extending GPIO or parallel bus signals from an aging 8051-based controller to add-on peripherals. IC Role / Device Role / Timing Role: Level-translating and driving buffer that maintains TTL compatibility while adding 3-state control for bus sharing. Use Value: 7.0 ns propagation delay and 15-mA sourcing ensure reliable setup/hold timing margins with legacy 8051 peripherals operating at 12-MHz crystal clocks. |
| Automotive Body Control Module (BCM) Sub-Bus | Test Equipment Digital I/O Adapter |
Use Scenario: Interfacing MCU core to distributed sensor/actuator nodes over short-haul harness wiring in BCM sub-systems. IC Role / Device Role / Timing Role: Direction-controlled transceiver enabling bidirectional diagnostic communication and configuration updates. Use Value: Ioff protection prevents latch-up during battery disconnect events, supporting ISO 16750-2 load-dump and cold-crank transient resilience. | Use Scenario: Adapting test instrument digital I/O channels to match DUT pinout and drive strength requirements. IC Role / Device Role / Timing Role: Reconfigurable bus driver supporting both stimulus injection and response capture modes via T/R control. Use Value: 12-mA sink capability drives LED indicators and relays directly; OE pin allows dynamic channel isolation during multi-DUT parallel testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY74FCT2245ATSOCT | 4.6 ns max propagation delay (vs. 7.0 ns); identical pinout, package, and electrical specs otherwise. | Better suited for higher-speed bus timing budgets where <5 ns delay is required. | Select CY74FCT2245ATSOCT when system timing closure demands tighter propagation delay. |
| SN74FCT245CTSOCT | Lacks integrated 25-Ω output series resistors and edge-rate control; otherwise functionally and pin-compatible. | Requires external series termination for clean signal integrity on longer traces. | Choose SN74FCT245CTSOCT only if cost sensitivity outweighs noise-performance requirements. |
Compared with CY74FCT2245ATSOCT, the CY74FCT2245TSOCTE4 trades speed for lower cost and broader availability; versus SN74FCT245CTSOCT, it delivers superior signal integrity out-of-the-box but at slightly higher unit price due to integrated termination.
Availability
CY74FCT2245TSOCTE4 is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive body control modules, legacy microcontroller bus extensions, test equipment adapters, and embedded subsystem interconnects requiring stable component supply and long-term lifecycle support.
Supply support for CY74FCT2245TSOCTE4 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 for industrial, automotive, and personal electronics markets.
The CY74FCT2245TSOCTE4 belongs to TI's FCT logic family, engineered specifically for high-noise-immunity, 5-V bus interface applications where signal integrity, power sequencing safety, and TTL interoperability are critical.
FAQ
What is the maximum operating temperature range for CY74FCT2245TSOCTE4?
The CY74FCT2245TSOCTE4 is rated for operation from –40°C to +85°C ambient temperature. This industrial-grade range supports deployment in harsh environments such as factory automation controllers, automotive body modules, and outdoor test instrumentation without derating. Thermal performance is validated per JEDEC JESD51-7 with θJA = 58°C/W for the SOIC-20 package.
Does CY74FCT2245TSOCTE4 support hot-swap or partial-power-down operation?
Yes, CY74FCT2245TSOCTE4 supports partial-power-down operation via its Ioff circuitry. When VCC = 0 V, output leakage remains within ±1 µA even with up to 4.5 V applied at I/O pins, preventing damaging back-current flow. This enables safe insertion/removal in live backplanes and mixed-supply systems where subsystems power up/down asynchronously.
How does the T/R pin control data direction in CY74FCT2245TSOCTE4?
In CY74FCT2245TSOCTE4, the T/R pin is an active-high control: when T/R = HIGH, data flows from Port A (pins 2–9) to Port B (pins 13–20); when T/R = LOW, data flows from Port B to Port A. This real-time bidirectional control allows dynamic bus arbitration without requiring separate transmit/receive lines or external logic.
Can CY74FCT2245TSOCTE4 replace CY74FCT245T in an existing design?
Yes, CY74FCT2245TSOCTE4 is function- and pin-compatible with CY74FCT245T and can serve as a direct replacement. Its integrated 25-Ω output series resistors and edge-rate control improve noise characteristics over the CY74FCT245T, making it ideal for upgrading signal integrity in legacy designs without layout changes.
What is the purpose of the 25-Ω output series resistance in CY74FCT2245TSOCTE4?
The 25-Ω output series resistance in CY74FCT2245TSOCTE4 is built into each output driver to match typical PCB trace impedance (50–75 Ω), thereby reducing signal reflections, overshoot, and ringing. This eliminates the need for discrete series termination resistors, saving board space and improving reliability in high-speed bus interfaces up to 20 MHz.
CY74FCT2245TSOCTE4 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:
- Discontinued at Digi-Key
- 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
CY74FCT2245TSOCTE4 FAQ
1.How can I place an order for CY74FCT2245TSOCTE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY74FCT2245TSOCTE4 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 CY74FCT2245TSOCTE4 reliable?
The price and inventory of CY74FCT2245TSOCTE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT2245TSOCTE4 is usually 5 days.
3.What payment methods are accepted for CY74FCT2245TSOCTE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT2245TSOCTE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY74FCT2245TSOCTE4?
CY74FCT2245TSOCTE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY74FCT2245TSOCTE4 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 CY74FCT2245TSOCTE4?
For technical support, including CY74FCT2245TSOCTE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT2245TSOCTE4 requirements.
6.How does Aetrix verify that CY74FCT2245TSOCTE4 is sourced from the original manufacturer or authorized distributors?
All CY74FCT2245TSOCTE4 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 CY74FCT2245TSOCTE4 meets industry standards.
7.What is the process for return or replacement of CY74FCT2245TSOCTE4?
All CY74FCT2245TSOCTE4 units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT2245TSOCTE4, 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 CY74FCT2245TSOCTE4 part is unused and in its original packaging.
Return procedure for CY74FCT2245TSOCTE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY74FCT2245TSOCTE4 Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
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.
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…
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…
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…
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 …
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…
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…
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…
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…
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…
