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Renesas 74FCT245ATPGG8
- Part No.:
- 74FCT245ATPGG8
- Manufacturer:
- Renesas
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74FCT245ATPGG8.pdf
- Description:
- IC TXRX NON-INVERT 5.25V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,204
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Product details
Overview
74FCT245ATPGG8 from Renesas Electronics is a FAST CMOS octal bidirectional transceiver with TTL-compatible inputs/outputs, 5V supply operation, ±1µA max input leakage, -15mA IOH / 64mA IOL drive strength, and industrial temperature range (-40°C to +85°C). It enables asynchronous two-way data bus communication in backplane or board-level interconnect applications.
For engineers reviewing the 74FCT245ATPGG8 datasheet, 74FCT245ATPGG8 pinout, 74FCT245ATPGG8 application, or 74FCT245ATPGG8 equivalent, key selection criteria include direction control (T/R), 3-state output enable (OE), high-drive capability for bus loading, live-insertion support, and TSSOP-20 package compatibility with JEDEC standard 18.
Technical Context
The 74FCT245ATPGG8 implements an octal bidirectional data path controlled by separate Transmit/Receive (T/R) and Output Enable (OE) signals. Data flows A→B when T/R = HIGH and OE = LOW; B→A when T/R = LOW and OE = LOW; both ports enter high-impedance state when OE = HIGH - independent of T/R state.
It uses advanced dual-metal CMOS technology to achieve true TTL voltage compatibility (VOH = 3.3V typ., VOL = 0.3V typ.) while maintaining CMOS power efficiency (ICC ≤ 1mA typ.). The device meets JEDEC Std-18 and supports live insertion via power-off disable 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 | 1.5–4.1 ns (A↔B) - enables high-speed bus bridging up to ~200 MHz system timing |
| Output Drive | -15mA IOH / +64mA IOL - drives heavy capacitive loads and multiple TTL inputs without buffers |
| Input Leakage | ≤ ±1 µA - ensures stable logic levels in low-power standby or high-impedance bus states |
| Operating Temp | -40°C to +85°C - qualified for industrial environments including factory automation and telecom infrastructure |
| Package | TSSOP-20 (PGG20) - 0.65mm pitch, surface-mount, footprint-compatible with SOIC-20 but 30% smaller area |
Pinout & Package
TSSOP-20 (PGG20) package: 20-pin thin shrink small outline package with 0.65 mm lead pitch, exposed pad not present, RoHS-compliant matte tin lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Active-Low Output Enable | Disables both A and B ports to high-Z when HIGH; required for bus arbitration and hot-swap isolation |
| 2 (T/R) | Direction Control Input | HIGH = A→B data flow; LOW = B→A data flow; synchronous with OE assertion |
| 3–10 (A0–A7) | Side-A Bidirectional I/O | Connects to local bus; functions as input or 3-state output depending on T/R and OE state |
| 11 (GND) | Ground Reference | Primary signal return; must be low-inductance connection to minimize ground bounce during switching |
| 12–19 (B0–B7) | Side-B Bidirectional I/O | Connects to remote bus; mirrors A-side behavior with opposite directionality |
| 20 (VCC) | Power Supply | +5V supply only; decoupling capacitor (0.1 µF ceramic) required within 5 mm of this pin |
Key Features
| Feature | Design Value |
|---|---|
| True TTL-compatible I/O | VOH ≥ 2.4V @ –6mA and VOL ≤ 0.55V @ 48mA ensures interoperability with legacy 5V TTL systems without level shifters |
| Live-insertion support | Outputs disable to high-Z when VCC = 0V - permits safe insertion/removal into powered backplanes or hot-swap carriers |
| Low dynamic power | ICCD ≤ 0.25 mA/MHz - reduces total bus power at 10 MHz toggle rate versus standard LS-TTL equivalents |
| JEDEC Std-18 compliance | Validated against industry-standard AC/DC parametric limits - simplifies qualification for military and industrial programs |
Applications
| Industrial Backplane Interconnect | Legacy System Bus Extension |
|---|---|
Use Scenario: Bridging CPU and peripheral buses across multi-slot industrial backplanes with mixed-voltage subsystems. IC Role / Device Role / Timing Role: Octal bidirectional transceiver providing direction-controlled, 3-state-isolated data transfer between isolated bus segments. Use Value: Enables deterministic latency (≤4.1 ns) and robust noise margin (200 mV hysteresis) in electrically noisy factory-floor environments. | Use Scenario: Extending aging 5V TTL data buses in test equipment or programmable logic controllers without redesigning PCB layout. IC Role / Device Role / Timing Role: Drop-in replacement for 74LS245 with higher drive strength and lower power, preserving existing timing budgets. Use Value: Eliminates need for external bus buffers while supporting longer trace lengths (up to 15 cm @ 20 MHz) due to 64mA sink capability. |
| Hot-Swappable Module Interface | Microcontroller-to-Peripheral Bridge |
Use Scenario: Enabling field-replaceable modules in telecom line cards where boards are inserted/removed under power. IC Role / Device Role / Timing Role: Isolating module-local bus from main backplane during insertion using OE-controlled high-Z state and power-off disable. Use Value: Prevents bus contention and latch-up during hot-swap events - validated per MIL-STD-883 Class B requirements. | Use Scenario: Connecting an 8-bit microcontroller port to external memory-mapped peripherals with different timing domains. IC Role / Device Role / Timing Role: Synchronizing asynchronous read/write handshaking between MCU and slower peripherals via direction-controlled data latching. Use Value: Reduces GPIO pin count by 50% versus discrete directional buffers; supports burst-mode transfers with <5 ns 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 | Lower drive (–15mA/32mA), no live-insertion support, wider propagation delay (15 ns max), PDIP-20 only | Limited to non-hot-swap, low-speed legacy designs; lacks TSSOP packaging and industrial temp rating | Select only if cost-sensitive and operating below 5 MHz with no hot-swap requirement |
| 74LVC245APW | 3.3V-only supply (1.65–3.6V), higher speed (2.4 ns typ.), but incompatible with 5V TTL signaling | Requires level translation for 5V systems; unsuitable for direct 74FCT245ATPGG8 replacement without circuit modification | Prefer for new 3.3V designs needing lower power and faster timing; not a drop-in substitute |
Compared with SN74F245N and 74LVC245APW, the 74FCT245ATPGG8 uniquely delivers 5V TTL compatibility, industrial temperature operation, live-insertion capability, and TSSOP-20 packaging in a single device - making it the only choice for upgrading legacy 5V bus systems requiring reliability and space efficiency.
Availability
74FCT245ATPGG8 is available at Aetrix Electronics and suitable for industrial backplane interconnect, legacy system bus extension, and hot-swappable module interface applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for 74FCT245ATPGG8 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, infrastructure, and IoT applications.
The IDT FCT logic family - including the 74FCT245ATPGG8 - was designed specifically for high-reliability 5V bus interfacing in industrial and military systems, emphasizing TTL compatibility, low power, and robust ESD/EMI performance.
FAQ
What is the maximum clock/data frequency supported by the 74FCT245ATPGG8?
The 74FCT245ATPGG8 does not operate on a clock; it is an asynchronous transceiver. Its usable data rate depends on propagation delay (≤4.1 ns) and system setup/hold timing. In practice, it reliably supports bidirectional data transfers up to 100–150 MHz in well-terminated 5V bus systems, assuming proper PCB layout and load capacitance ≤50 pF per line.
Does the 74FCT245ATPGG8 support hot-swap or live-insertion?
Yes, the 74FCT245ATPGG8 supports live insertion: its outputs enter high-impedance state when VCC = 0V, preventing bus contention during board insertion into a powered backplane. This behavior is verified per MIL-STD-883 Class B and is intrinsic to the device's power-off disable architecture.
What is the function of the T/R and OE pins on the 74FCT245ATPGG8?
On the 74FCT245ATPGG8, OE (pin 1) is active-low and globally disables both A and B ports to high-Z when HIGH. T/R (pin 2) controls direction: HIGH enables A→B data flow, LOW enables B→A flow - but only when OE is LOW. Both signals are CMOS-compatible with TTL voltage thresholds.
Is the 74FCT245ATPGG8 pin-compatible with the 74LS245?
Yes, the 74FCT245ATPGG8 is pin-compatible with the 74LS245 in TSSOP-20 (PGG20) and SOIC-20 packages. Pin numbering, signal names (A0–A7, B0–B7, OE, T/R, VCC, GND), and functional behavior match exactly - enabling direct replacement with improved drive strength, lower power, and better noise immunity.
What package type does the 74FCT245ATPGG8 use, and what does 'PGG8' signify?
The 74FCT245ATPGG8 uses a TSSOP-20 package (Renesas code PGG20). The 'PGG8' suffix indicates Tape-and-Reel packaging (8 = reel), Thin Shrink Small Outline Package (PGG), 20-pin count, and industrial temperature grade - consistent with Renesas' ordering nomenclature in the datasheet's Table 7.
74FCT245ATPGG8 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
74FCT245ATPGG8 FAQ
1.How can I place an order for 74FCT245ATPGG8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74FCT245ATPGG8 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 74FCT245ATPGG8 reliable?
The price and inventory of 74FCT245ATPGG8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74FCT245ATPGG8 is usually 5 days.
3.What payment methods are accepted for 74FCT245ATPGG8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74FCT245ATPGG8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74FCT245ATPGG8?
74FCT245ATPGG8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74FCT245ATPGG8 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 74FCT245ATPGG8?
For technical support, including 74FCT245ATPGG8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74FCT245ATPGG8 requirements.
6.How does Aetrix verify that 74FCT245ATPGG8 is sourced from the original manufacturer or authorized distributors?
All 74FCT245ATPGG8 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 74FCT245ATPGG8 meets industry standards.
7.What is the process for return or replacement of 74FCT245ATPGG8?
All 74FCT245ATPGG8 units undergo pre-shipment inspection (PSI). If there is an issue with 74FCT245ATPGG8, 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 74FCT245ATPGG8 part is unused and in its original packaging.
Return procedure for 74FCT245ATPGG8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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