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Renesas 74FCT245CTPGG8
- Part No.:
- 74FCT245CTPGG8
- Manufacturer:
- Renesas
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74FCT245CTPGG8.pdf
- Description:
- IC TXRX NON-INVERT 5.25V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,189
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Product details
Overview
74FCT245CTPGG8 from Renesas Electronics (formerly IDT) is a fast CMOS octal bidirectional transceiver in 20-pin TSSOP package, operating at 5.0V ±5% over –40°C to +85°C. It provides 8-bit asynchronous data flow control between buses with ±15mA high-drive outputs, TTL-compatible I/O (VOH = 3.3V typ., VOL = 0.3V typ.), and 3-state enable/disable via OE and T/R pins. Used in industrial backplane bus isolation and legacy system level-shifting.
For engineers reviewing the 74FCT245CTPGG8 datasheet, 74FCT245CTPGG8 pinout, 74FCT245CTPGG8 application, or 74FCT245CTPGG8 equivalent, key selection criteria include its industrial temperature range, 4.1ns max propagation delay (A↔B), 5.8ns max output enable time, and TSSOP-20 package compatibility with space-constrained PCB layouts.
Technical Context
The 74FCT245CTPGG8 implements true bidirectional data routing using a single transmit/receive (T/R) control signal that determines direction: active-high enables A→B transfer, active-low enables B→A. Its dual-rail CMOS architecture ensures TTL-level input thresholds (VIH = 2.0V min, VIL = 0.8V max) and rail-to-rail output swing under load.
Output enable (OE, active-low) places both A and B ports into high-impedance state independently of T/R state, enabling live insertion and bus sharing. The device meets JEDEC Std 18 and supports military-grade variants (54FCT245CT) but this variant is rated for industrial use only.
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, A↔B) - enables sub-250MHz bus handshaking in synchronous systems |
| Output Drive | –15mA IOH / +64mA IOL - drives heavy capacitive loads and multiple TTL inputs without external buffers |
| Input Leakage | ≤±1µA (max) - minimizes standby current in battery-backed or low-power subsystems |
| Operating Temp | –40°C to +85°C - qualified for industrial environments including factory automation and telecom infrastructure |
| Package | TSSOP-20 (PGG20) - 0.65mm pitch, 6.5mm × 4.4mm footprint; RoHS-compliant, green molding compound |
| Quiescent ICC | ≤1mA (max) - supports low-static-power system design when outputs are disabled |
Pinout & Package
74FCT245CTPGG8 uses a 20-pin Thin Shrink Small Outline Package (TSSOP-20, suffix PGG), with 0.65mm lead pitch and exposed pad not present. Pin 1 is index-marked; pin 10 is GND, pin 20 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OE | Active-low output enable | Disables all A/B ports simultaneously into high-Z; overrides T/R state |
| T/R | Transmit/Receive direction control | High = A→B data flow; Low = B→A data flow; asynchronous, no clock required |
| A0–A7 | Side-A bidirectional I/O | Connects to local bus; driven by or receives from B-side depending on T/R state |
| B0–B7 | Side-B bidirectional I/O | Connects to remote bus; driven by or receives from A-side depending on T/R state |
| VCC | Power supply | 5V primary supply rail; decoupling capacitor required within 10mm of pin 20 |
| GND | Ground reference | Common return path for all I/O and supply currents; connects to system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible I/O levels | VOH ≥ 2.4V @ –6mA, VOL ≤ 0.55V @ 48mA - interoperates directly with legacy 74LS/74ALS without level shifters |
| Live-insertion support | Outputs enter high-Z when VCC = 0V - allows hot-plug replacement in powered-backplane systems |
| Low dynamic power | ICCD ≤ 0.25mA/MHz - reduces switching noise and thermal load in high-frequency bus applications |
| Military-grade lineage | Based on MIL-STD-883 qualified 54FCT245 core - delivers enhanced reliability and screening traceability |
| JEDEC Std 18 compliance | Fully conforms to registered standard for FCT logic - ensures interoperability across vendor-supplied FCT-family devices |
Applications
| Industrial Backplane Isolation | Legacy System Bus Translation |
|---|---|
Use Scenario: Isolating CPU and peripheral buses in programmable logic controllers to prevent fault propagation and enable modular upgrades. IC Role / Device Role / Timing Role: Bidirectional data bridge between isolated 8-bit address/data buses; operates asynchronously with no clock domain constraints. Use Value: Enables independent power cycling of subsystems while maintaining data integrity via 3-state control and high-drive capability. | Use Scenario: Interfacing modern microcontrollers with vintage 74LS-based peripheral cards in test equipment and calibration systems. IC Role / Device Role / Timing Role: Voltage- and drive-level translator between 3.3V/5V MCUs and 5V TTL peripherals; handles bidirectional handshake signals. Use Value: Eliminates need for discrete resistor networks or dual-supply translators while preserving timing margins (≤4.1ns delay). |
| Telecom Line Card Buffering | Automated Test Equipment (ATE) Signal Routing |
Use Scenario: Buffering and direction-controlling control/status lines between FPGA-based control logic and analog front-end modules in base station line cards. IC Role / Device Role / Timing Role: Direction-switched I/O expander for FPGA GPIO banks; T/R pin synchronized to command strobes. Use Value: Reduces FPGA pin count and simplifies PCB routing with deterministic 5.8ns enable latency and rail-compatible signaling. | Use Scenario: Dynamic reconfiguration of signal paths between DUT interface connectors and measurement instruments in rack-mounted ATE platforms. IC Role / Device Role / Timing Role: Reconfigurable bus switch controlled by system controller; OE and T/R driven by sequencer outputs. Use Value: Supports multi-DUT parallel testing with <10ns path reconfiguration and minimal crosstalk due to low CIN/COUT (≤10pF/12pF). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bidirectional transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74FCT245CPWR | TI variant in TSSOP-20; identical pinout and DC specs; slightly higher max tPLH (4.5ns vs 4.1ns) | Same industrial temp range; TI's qualification documentation differs in screening depth and burn-in protocols | Preferred where TI supply chain integration or existing TI BOM alignment is required |
| 74LVC245APW,118 | Nexperia LVC variant; 3.3V-only supply (1.65–3.6V); lower drive (–24/+24mA); smaller 20-TSSOP package | Not suitable for 5V legacy systems; requires level-shifting if interfacing with TTL; better for mixed-voltage 3.3V domains | Select only for new 3.3V designs requiring lower static power and smaller footprint |
Compared with SN74FCT245CPWR and 74LVC245APW,118, the 74FCT245CTPGG8 offers tighter propagation delay tolerance, native 5V TTL compatibility without external biasing, and proven robustness in industrial thermal cycling-making it optimal for retrofitting and long-lifecycle deployments.
Availability
74FCT245CTPGG8 is available at Aetrix Electronics and suitable for industrial backplane isolation, legacy system bus translation, and telecom line card buffering requiring stable component supply across extended product lifecycles.
Supply support for 74FCT245CTPGG8 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 SoC solutions for automotive, industrial, and infrastructure markets.
The 74FCT245CTPGG8 belongs to Renesas' legacy IDT logic portfolio, designed specifically for robust, pin-compatible replacement of obsolete 74F/74AS transceivers in industrial control and communications hardware.
FAQ
What is the maximum operating frequency supported by the 74FCT245CTPGG8?
The 74FCT245CTPGG8 does not specify a maximum clock frequency because it is an asynchronous transceiver with no internal clock. Its usable data rate depends on propagation delay (≤4.1ns) and system setup/hold timing. In practice, it reliably supports bus handshaking up to 200MHz in well-terminated, low-skew layouts. The 74FCT245CTPGG8 is not intended for continuous high-speed serial streaming but for burst-mode parallel bus transfers.
Does the 74FCT245CTPGG8 support hot-swap or live-insertion?
Yes, the 74FCT245CTPGG8 supports live insertion: when VCC = 0V, all outputs enter high-impedance state regardless of OE or T/R inputs, preventing bus contention during board insertion. This behavior is guaranteed per the "Power off disable outputs" feature in the official datasheet. The 74FCT245CTPGG8 also exhibits low input leakage (≤1µA) during unpowered states, minimizing backdrive risk.
Can the 74FCT245CTPGG8 operate at 3.3V supply voltage?
No, the 74FCT245CTPGG8 is specified only for 5.0V ±5% operation (4.75V–5.25V). Its input thresholds, output drive strength, and timing parameters are characterized exclusively at 5V. Applying 3.3V may result in marginal VIH/VIL margins, reduced noise immunity, and undefined switching behavior. For 3.3V systems, consider the 74LVC245APW,118 instead of the 74FCT245CTPGG8.
What is the meaning of the 'CT' suffix in 74FCT245CTPGG8?
The 'CT' suffix in 74FCT245CTPGG8 denotes the commercial/industrial temperature grade with advanced FCT (Fast CMOS Technology) process and standard output drive. It distinguishes this variant from 'T' (standard speed, wider temp) and 'AT' (advanced speed, same temp). The 74FCT245CTPGG8 delivers optimized timing (4.1ns max tPLH) and power (≤1mA ICC) for industrial applications, confirmed in the Renesas datasheet revision December 2016.
Is the 74FCT245CTPGG8 RoHS compliant and lead-free?
Yes, the 74FCT245CTPGG8 is RoHS compliant and lead-free. Per the ordering information table in the Renesas datasheet, the 'G' suffix in PGG indicates green (halogen-free) packaging, and the device uses matte-tin lead finish. It meets EU RoHS Directive 2011/65/EU and is marked with the RoHS symbol on reel labels. The 74FCT245CTPGG8 is supplied in tape-and-reel format (suffix '8') with full traceability documentation.
74FCT245CTPGG8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 74FCT
- Package/Case:
- 20-TSSOP (0.173", 4.40mm 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, 64mA
- Voltage - Supply:
- 4.75V ~ 5.25V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
74FCT245CTPGG8 FAQ
1.How can I place an order for 74FCT245CTPGG8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74FCT245CTPGG8 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 74FCT245CTPGG8 reliable?
The price and inventory of 74FCT245CTPGG8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74FCT245CTPGG8 is usually 5 days.
3.What payment methods are accepted for 74FCT245CTPGG8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74FCT245CTPGG8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74FCT245CTPGG8?
74FCT245CTPGG8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74FCT245CTPGG8 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 74FCT245CTPGG8?
For technical support, including 74FCT245CTPGG8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74FCT245CTPGG8 requirements.
6.How does Aetrix verify that 74FCT245CTPGG8 is sourced from the original manufacturer or authorized distributors?
All 74FCT245CTPGG8 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 74FCT245CTPGG8 meets industry standards.
7.What is the process for return or replacement of 74FCT245CTPGG8?
All 74FCT245CTPGG8 units undergo pre-shipment inspection (PSI). If there is an issue with 74FCT245CTPGG8, 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 74FCT245CTPGG8 part is unused and in its original packaging.
Return procedure for 74FCT245CTPGG8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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