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Renesas 74FCT2245CTSOG8
- Part No.:
- 74FCT2245CTSOG8
- Manufacturer:
- Renesas
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74FCT2245CTSOG8.pdf
- Description:
- IC TXRX NON-INVERT 5.25V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,104
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Product details
Overview
74FCT2245CTSOG8 from Renesas Electronics is a FAST CMOS octal bidirectional transceiver with true TTL input/output compatibility, ±15mA output drive (IOH/IOH), 4.1ns max propagation delay (74FCT2245CT grade), and industrial temperature range (–40°C to +85°C). It enables asynchronous two-way data transfer between 8-bit buses in memory expansion, bus isolation, and level-shifting applications.
For engineers reviewing the 74FCT2245CTSOG8 datasheet, 74FCT2245CTSOG8 pinout, 74FCT2245CTSOG8 application, or 74FCT2245CTSOG8 equivalent, key selection criteria include direction control via T/R pin, 3-state output enable (OE active-low), SOIC-20 green package compatibility, and guaranteed 2.4V VOH at –15mA load under minimum VCC.
Technical Context
The 74FCT2245CTSOG8 implements dual-metal CMOS logic with resistor-limited outputs to suppress ground bounce and control edge rates-eliminating need for external series termination. Its T/R pin selects unidirectional flow (A→B on high, B→A on low), while OE independently places both A and B ports into high-Z state.
It meets JEDEC Standard 18, supports TTL-level inputs (VIH ≥ 2.0V, VIL ≤ 0.8V), and delivers balanced drive strength: –15mA IOH and +12mA IOL at VOUT = 1.5V. Quiescent ICC is ≤1mA, and dynamic current scales linearly with toggle frequency and number of active outputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply | 5.0V ±5% - fixed single-rail operation; no internal regulation or wide-VCC support |
| Propagation Delay | 4.1ns max (tPLH/tPHL, CL = 50pF) - enables >200MHz bus handshaking in synchronous systems |
| Output Drive | –15mA IOH / +12mA IOL - sufficient to drive 50Ω transmission lines or multiple TTL loads without buffers |
| Input Leakage | ≤±1μA (IIH/IIL) - ensures minimal bus loading during high-Z states and reduces static power in idle systems |
| Operating Temp | –40°C to +85°C - qualified for industrial environments including factory automation and motor control cabinets |
| Capacitance | CIN ≤10pF, COUT ≤12pF - low pin capacitance preserves signal integrity on fast-switching 8-bit parallel buses |
Pinout & Package
74FCT2245CTSOG8 is housed in a 20-pin Small Outline IC (SOIC) green package (SOG), 7.5mm body width, 1.27mm pitch, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Active-low output enable | Drives all A and B ports into high-Z when high; critical for bus arbitration and multi-master isolation |
| 2 (T/R) | Direction control input | High = A→B data flow; low = B→A; asynchronous, no clock dependency |
| 3–10 (A0–A7) | Side-A bidirectional I/O | Connects to local bus (e.g., microcontroller data bus); shares pins for input and output based on T/R state |
| 11 (GND) | Ground reference | Primary return path for all I/O and supply currents; requires low-inductance PCB connection |
| 12–19 (B0–B7) | Side-B bidirectional I/O | Connects to remote bus (e.g., peripheral or memory module); electrically isolated from A side except through transceiver core |
| 20 (VCC) | Power supply | +5V supply only; no internal decoupling - external 0.1μF ceramic capacitor required per device |
Key Features
| Feature | Design Value |
|---|---|
| Resistor-limited outputs | Integrated current-limiting resistors reduce ground bounce and eliminate need for external series termination resistors |
| TTL-compatible I/O | VOH = 2.4V min at –15mA ensures reliable HIGH recognition by legacy TTL devices; VOL = 0.5V max at +12mA guarantees LOW margin |
| Low quiescent current | ICC ≤1mA at static conditions enables use in power-sensitive industrial controllers without thermal derating |
| JEDEC Std 18 compliance | Validated interoperability with industry-standard 5V logic families, simplifying qualification in mixed-vendor systems |
Applications
| Memory Expansion Interface | Industrial Bus Isolation |
|---|---|
Use Scenario: Extending 8-bit data bus from microcontroller to external SRAM or EPROM in PLC mainboards. IC Role / Device Role / Timing Role: Bidirectional data bridge with direction controlled by address decoder output; OE synchronized to memory read/write strobes. Use Value: Enables seamless 8-bit data transfer without bus contention; 4.1ns delay allows full-speed access to 25MHz memory cycles. | Use Scenario: Isolating CAN controller data bus from noisy motor drive section in factory automation HMI panels. IC Role / Device Role / Timing Role: Level-shifting and noise-decoupled interface between MCU and peripheral bus; OE used for fault-safe shutdown. Use Value: Prevents ground loop-induced corruption; ±1μA leakage ensures stable high-Z state during system reset or watchdog timeout. |
| Legacy System Upgrade | Test Equipment Data Link |
Use Scenario: Replacing obsolete 74LS245 in aging test jigs requiring TTL-compatible 8-bit bidirectional buffering. IC Role / Device Role / Timing Role: Pin-compatible upgrade path (same SOIC-20 footprint); retains identical OE/T/R control logic and timing margins. Use Value: Eliminates LS-family power dissipation (10× lower ICC) while maintaining full backward compatibility with existing PCB layouts. | Use Scenario: Interfacing FPGA-based pattern generator to DUT's 8-bit parallel test port in automated semiconductor testers. IC Role / Device Role / Timing Role: Synchronizing burst-mode data transfers; T/R toggled per packet; OE gated by handshake signals. Use Value: 12mA IOL drives capacitive DUT loads up to 100pF directly; low COUT minimizes skew across all 8 bits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bidirectional transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74F245N | Faster tPLH (3.5ns typ), but higher ICC (5mA typ), no integrated output resistors, non-RoHS through-hole only | Requires external termination; unsuitable for new green-design programs or space-constrained SOIC layouts | Select only for legacy repair or where raw speed outweighs power and layout constraints |
| 74LCX245MTCX | 3.3V-only supply, 3.6V-tolerant I/O, lower drive (±24mA), 5.5ns max delay, TSSOP-20 package | Designed for mixed-voltage 3.3V/5V systems; not drop-in for 5V-only designs due to VCC limitation | Choose when interfacing 3.3V FPGAs to 5V peripherals using level translation, not direct replacement |
Compared with SN74F245N and 74LCX245MTCX, the 74FCT2245CTSOG8 uniquely balances 5V TTL compatibility, integrated noise suppression, industrial temp rating, and RoHS-compliant SOIC packaging-making it optimal for new industrial control designs requiring reliability and supply-chain longevity.
Availability
74FCT2245CTSOG8 is available at Aetrix Electronics and suitable for memory expansion interfaces, industrial bus isolation, and legacy system upgrades requiring stable component supply and long-term industrial-grade availability.
Supply support for 74FCT2245CTSOG8 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
Renesas Electronics Corporation is a global semiconductor leader delivering microcontrollers, analog, power, and connectivity solutions for automotive, industrial, and IoT applications.
The IDT FCT logic family-including the 74FCT2245CTSOG8-is engineered for high-noise industrial environments, emphasizing robust 5V TTL interoperability, low ground bounce, and extended temperature operation without performance trade-offs.
FAQ
What is the maximum operating frequency supported by the 74FCT2245CTSOG8?
The 74FCT2245CTSOG8 does not specify a maximum clock frequency because it is an asynchronous transceiver. Its usable data rate depends on propagation delay (4.1ns max) and system setup/hold timing. In practice, it reliably supports bus handshaking up to 200MHz in well-terminated 8-bit parallel interfaces, assuming proper PCB layout and load capacitance ≤50pF.
Does the 74FCT2245CTSOG8 support hot insertion or live bus swapping?
No, the 74FCT2245CTSOG8 is not hot-swap rated. Its absolute maximum ratings specify VTERM = –0.5V to VCC+0.5V on I/O pins, with no built-in bus-hold or power-up/down protection. Applying signals before VCC stabilization may cause latch-up. For hot-swap applications, external protection circuitry or dedicated hot-swap transceivers are required.
Can the 74FCT2245CTSOG8 be used with 3.3V logic systems?
The 74FCT2245CTSOG8 requires a 5.0V ±5% supply and is not 3.3V-compatible. While its inputs accept 3.3V as valid HIGH (VIH min = 2.0V), outputs swing to 3.3V typical VOH only under light load; driving 3.3V CMOS inputs directly risks marginal noise margins. Use level translators like 74LVC245 for mixed-voltage interconnects.
What is the function of the T/R and OE pins on the 74FCT2245CTSOG8?
The T/R (Transmit/Receive) pin controls data direction: high enables A→B flow, low enables B→A flow. The OE (Output Enable) pin is active-low and disables both A and B ports simultaneously by placing them in high-impedance state. These functions operate independently-OE can override T/R to force tristate regardless of direction setting.
Is the 74FCT2245CTSOG8 pin-compatible with the older 74F245?
Yes, the 74FCT2245CTSOG8 is a functional and pin-compatible upgrade to the 74F245 in SOIC-20 packaging. It retains identical pinout, electrical signaling (TTL-compatible), and control logic (OE active-low, T/R direction), while improving ICC (1mA vs 50mA), reducing ground bounce, and adding industrial temperature qualification.
74FCT2245CTSOG8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 74FCT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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
74FCT2245CTSOG8 FAQ
1.How can I place an order for 74FCT2245CTSOG8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74FCT2245CTSOG8 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 74FCT2245CTSOG8 reliable?
The price and inventory of 74FCT2245CTSOG8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74FCT2245CTSOG8 is usually 5 days.
3.What payment methods are accepted for 74FCT2245CTSOG8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74FCT2245CTSOG8 transactions.
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4.How is shipping managed for 74FCT2245CTSOG8?
74FCT2245CTSOG8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74FCT2245CTSOG8 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 74FCT2245CTSOG8?
For technical support, including 74FCT2245CTSOG8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74FCT2245CTSOG8 requirements.
6.How does Aetrix verify that 74FCT2245CTSOG8 is sourced from the original manufacturer or authorized distributors?
All 74FCT2245CTSOG8 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 74FCT2245CTSOG8 meets industry standards.
7.What is the process for return or replacement of 74FCT2245CTSOG8?
All 74FCT2245CTSOG8 units undergo pre-shipment inspection (PSI). If there is an issue with 74FCT2245CTSOG8, 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 74FCT2245CTSOG8 part is unused and in its original packaging.
Return procedure for 74FCT2245CTSOG8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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