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Renesas 74FCT245CTPGG
- Part No.:
- 74FCT245CTPGG
- Manufacturer:
- Renesas
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74FCT245CTPGG.pdf
- Description:
- IC TXRX NON-INVERT 5.25V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,679
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Product details
Overview
74FCT245CTPGG from Renesas Electronics (formerly IDT) is a FAST CMOS octal bidirectional transceiver with TTL-compatible inputs/outputs, 5V supply, industrial temperature range (–40°C to +85°C), and TSSOP-20 package. It enables asynchronous two-way data transfer between buses using active-low OE and active-high T/R control, with high-drive outputs (–15mA IOH, 64mA IOL). Used in bus isolation and level-shifting applications in industrial control backplanes.
For engineers reviewing the 74FCT245CTPGG datasheet, 74FCT245CTPGG pinout, 74FCT245CTPGG application, or 74FCT245CTPGG equivalent, key selection criteria include its 4.1ns max propagation delay (A↔B), 5.8ns max OE-enable time, ±1µA input leakage, 3.3V typical VOH, and TSSOP-20 footprint compatibility with legacy SOIC-20 layouts.
Technical Context
The 74FCT245CTPGG implements an 8-bit bidirectional data path controlled by two independent logic inputs: OE (active-low output enable) places both A and B ports in high-Z state when asserted, while T/R (transmit/receive) selects direction-high for A→B, low for B→A. It uses dual-metal CMOS process for TTL-level interface compliance without external pull-ups.
All 16 I/O pins (A0–A7, B0–B7) are 3-state capable with guaranteed VIH ≥2.0V and VIL ≤0.8V, supporting mixed-voltage system interfacing. Output drive strength is asymmetric: –15mA source at VOH = 2.4V (min), +64mA sink at VOL = 0.55V (max), enabling robust noise margin in noisy industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply | 5.0V ±5% - fixed single-rail operation; no internal regulation or wide-VCC tolerance |
| Propagation Delay | 4.1ns max (A↔B) - ensures sub-5ns timing closure in 100MHz synchronous bus systems |
| IOH / IOL | –15mA / +64mA - drives heavy capacitive loads (e.g., >100pF traces) without signal degradation |
| VIH / VIL | ≥2.0V / ≤0.8V - guarantees reliable recognition of standard TTL logic levels |
| Input Leakage | ≤±1µA max - minimizes standby current in battery-backed or low-power hold modes |
| Operating Temp | –40°C to +85°C - qualified for industrial-grade reliability per JEDEC 18 and AEC-Q100 Class 2 stress profiles |
| Package | TSSOP-20 (PGG) - 0.65mm pitch, 6.5×4.4mm body; compatible with automated SMT assembly |
Pinout & Package
74FCT245CTPGG is housed in a 20-pin Thin Shrink Small Outline Package (TSSOP), designated PGG20 per Renesas ordering nomenclature. The package features gull-wing leads, exposed pad not present, and is RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Active-low output enable | Drives all A/B ports into high-Z when HIGH; critical for bus arbitration and hot-swap safety |
| 2 (T/R) | Direction control input | HIGH = A→B data flow; LOW = B→A; determines real-time bus ownership |
| 3–10 (A0–A7) | Side-A bidirectional I/O | Connects to local bus; tri-stated when OE=HIGH or opposite-side active |
| 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; electrically isolated from A side except during active transfer |
| 20 (VCC) | Power supply | 5V rail only; decoupling capacitor (0.1µF) required within 5mm of pin for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| True TTL input compatibility | VIH ≥2.0V and VIL ≤0.8V ensure direct replacement of 74LS245 without level shifters |
| High-current sinking capability | 64mA IOL supports driving multiple TTL inputs or LED indicators directly |
| Live-insertion support | Power-off disable behavior prevents bus contention during hot-plug operations in modular systems |
| Low dynamic power consumption | 0.25mA/MHz ICCD enables use in burst-mode industrial controllers without thermal derating |
| MIL-STD-883 qualified variants available | Same die used in military-grade 54FCT245CT; allows design reuse across commercial/military platforms |
Applications
| Industrial Backplane Isolation | Legacy System Bus Translation |
|---|---|
Use Scenario: Isolating CPU bus from peripheral expansion slots in programmable logic controllers to prevent fault propagation. IC Role / Device Role / Timing Role: Bidirectional data bridge with direction control synchronized to address decode signals. Use Value: 4.1ns propagation delay ensures cycle-accurate data handoff between 25MHz CPU and 10MHz I/O modules. | Use Scenario: Interfacing modern microcontrollers with legacy 74LS-based peripheral cards in test equipment. IC Role / Device Role / Timing Role: Level translator and drive booster replacing obsolete 74LS245 with identical pinout. Use Value: TTL-compatible VIH/VIL and 64mA IOL eliminate need for external pull-ups or buffer stages. |
| Modular PLC I/O Carrier | Automated Test Equipment (ATE) Signal Routing |
Use Scenario: Enabling hot-swappable I/O modules in distributed control systems where modules may be inserted while powered. IC Role / Device Role / Timing Role: Bus isolator with OE-controlled high-Z state during insertion/removal sequences. Use Value: Power-off disable behavior prevents back-driving and latch-up on live backplane traces. | Use Scenario: Dynamically reconfiguring signal paths between DUT interface and measurement instruments in semiconductor testers. IC Role / Device Role / Timing Role: Reversible data switch controlled by FPGA logic for multi-DUT parallel testing. Use Value: Sub-5ns delay and 16-pin bidirectional routing minimize skew across 8-channel parallel test vectors. |
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 | 74F logic family; higher ICC (20mA typ), slower tPLH (10ns max), non-RoHS through-hole only | Limited to legacy through-hole designs; lacks TSSOP-20 footprint and industrial temp rating | Select only for backward compatibility with existing 74F-based PCBs where surface-mount is not feasible |
| 74LVC245APW | 3.3V-only supply; 1.65–3.6V VCC range; lower drive (–24mA/+24mA); different pinout (20-pin TSSOP but A/B swapped) | Requires level-shifting for 5V systems; unsuitable for direct 74FCT245CTPGG drop-in replacement | Prefer for new 3.3V-only designs needing lower power and smaller voltage margins |
Compared with SN74F245N and 74LVC245APW, the 74FCT245CTPGG uniquely balances 5V TTL compatibility, industrial temperature operation, TSSOP-20 packaging, and sub-5ns timing-making it the only option for upgrading legacy 74LS245 systems to RoHS-compliant SMT without redesigning layout or logic timing.
Availability
74FCT245CTPGG is available at Aetrix Electronics and suitable for industrial backplane isolation, legacy bus translation, and modular PLC I/O carrier applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74FCT245CTPGG 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 specializing in microcontrollers, analog, power, and timing solutions for industrial, automotive, and infrastructure markets.
The 74FCT245CTPGG belongs to Renesas' legacy IDT FAST CMOS logic family, designed specifically for high-reliability 5V bus interfacing in harsh industrial environments where timing precision and noise immunity are critical.
FAQ
What is the maximum operating temperature range for the 74FCT245CTPGG?
The 74FCT245CTPGG is rated for industrial temperature operation from –40°C to +85°C. This range is validated per JEDEC Standard No. 18 and supported by Renesas' qualification testing. It does not meet military-grade specifications (–55°C to +125°C), which apply only to the 54FCT245CT variant in CERDIP or LCC packages. Thermal derating is not required within this specified range.
Does the 74FCT245CTPGG support live insertion or hot-swap operation?
Yes, the 74FCT245CTPGG supports live insertion due to its power-off disable feature: when VCC is removed, all outputs enter high-impedance state automatically, preventing bus contention. This behavior is inherent to the device's internal circuitry and requires no external control. It is explicitly documented in the datasheet under "Power off disable outputs permit 'live insertion'" and verified across the full industrial temperature range.
What are the absolute maximum ratings for input voltage on the 74FCT245CTPGG?
The 74FCT245CTPGG has two absolute maximum input voltage ratings: –0.5V to +7.0V for inputs referenced to GND (including OE and T/R), and –0.5V to VCC+0.5V for I/O pins A0–A7 and B0–B7. Exceeding these limits risks permanent damage. These values are defined in the "Absolute Maximum Ratings" table of the official Renesas datasheet (DSC-5510/7, December 2016 revision).
Is the 74FCT245CTPGG pin-compatible with the 74LS245?
Yes, the 74FCT245CTPGG is pin-compatible with the 74LS245 in TSSOP-20 (PGG) and SOIC-20 (PY) packages. Pin functions (OE, T/R, A0–A7, B0–B7, GND, VCC) match exactly, and the 74FCT245CTPGG maintains identical logic behavior. However, it offers improved parameters: lower power, higher drive, tighter timing, and RoHS compliance-making it a direct upgrade path without PCB changes.
What is the typical quiescent supply current (ICC) for the 74FCT245CTPGG at 25°C?
The typical quiescent supply current (ICC) for the 74FCT245CTPGG is 0.01mA at VCC = 5.0V and TA = +25°C, with a maximum of 1mA over the full industrial temperature range. This value is measured with all inputs at GND or VCC and outputs unloaded. Dynamic current increases with toggle rate and number of active outputs, as detailed in the "Power Supply Characteristics" section of the Renesas datasheet.
74FCT245CTPGG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 74FCT
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- 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
74FCT245CTPGG FAQ
1.How can I place an order for 74FCT245CTPGG through Aetrix?
Please submit a Request for Quotation (RFQ) for 74FCT245CTPGG 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 74FCT245CTPGG reliable?
The price and inventory of 74FCT245CTPGG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74FCT245CTPGG is usually 5 days.
3.What payment methods are accepted for 74FCT245CTPGG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74FCT245CTPGG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74FCT245CTPGG?
74FCT245CTPGG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74FCT245CTPGG 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 74FCT245CTPGG?
For technical support, including 74FCT245CTPGG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74FCT245CTPGG requirements.
6.How does Aetrix verify that 74FCT245CTPGG is sourced from the original manufacturer or authorized distributors?
All 74FCT245CTPGG 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 74FCT245CTPGG meets industry standards.
7.What is the process for return or replacement of 74FCT245CTPGG?
All 74FCT245CTPGG units undergo pre-shipment inspection (PSI). If there is an issue with 74FCT245CTPGG, 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 74FCT245CTPGG part is unused and in its original packaging.
Return procedure for 74FCT245CTPGG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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