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Renesas 74FCT3245APGG8
- Part No.:
- 74FCT3245APGG8
- Manufacturer:
- Renesas
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74FCT3245APGG8.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,634
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Product details
Overview
74FCT3245APGG8 from Renesas Electronics (formerly IDT) is a 3.3V CMOS octal bidirectional transceiver with industrial temperature range (–40°C to +85°C), 4.6 ns max propagation delay (A↔B), ±60 mA output drive, and rail-to-rail output swing. It enables asynchronous bus isolation and level translation between two 8-bit data buses in embedded control and industrial I/O systems.
For engineers reviewing the 74FCT3245APGG8 datasheet, 74FCT3245APGG8 pinout, 74FCT3245APGG8 application, or 74FCT3245APGG8 equivalent, key selection criteria include direction control (DIR) and 3-state enable (OE) logic, QSOP-20 package compatibility, VCC = 2.7–3.6 V operation, and low ground bounce due to integrated series current-limiting resistors.
Technical Context
The 74FCT3245APGG8 implements dual-bus bidirectional data flow using a single DIR pin to set transfer direction (A→B or B→A) and an active-low OE pin that forces both ports into high-impedance state regardless of DIR. All inputs feature hysteresis (150 mV typical) for noise immunity in noisy industrial environments.
It uses 0.5 µm CMOS technology with CMOS power levels (0.4 µW static typical), supports TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max), and delivers rail-to-rail outputs (VOH ≥ VCC–0.2 V, VOL ≤ 0.4 V at 24 mA) for maximum noise margin in mixed-voltage systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7 V to 3.6 V - supports wide 3.3 V supply tolerance and brown-out resilience |
| Max Propagation Delay | 4.6 ns (A↔B) - ensures sub-5 ns timing for high-speed bus bridging up to ~200 MHz |
| Output Drive | ±60 mA - sufficient to drive 50 Ω transmission lines or multiple TTL loads without external buffers |
| Input Hysteresis | 150 mV - improves noise immunity on shared or long PCB traces in industrial settings |
| Quiescent ICC | 10 µA max - enables ultra-low standby power in battery-backed or energy-sensitive systems |
| Package | 20-pin QSOP (PGG) - 0.65 mm pitch, 7.2 × 4.4 mm footprint, RoHS-compliant green package |
| Operating Temp | –40°C to +85°C - qualified for industrial control, motor drives, and factory automation |
Pinout & Package
74FCT3245APGG8 is housed in a 20-pin Quarter-size Small Outline Package (QSOP), also designated PGG per Renesas ordering nomenclature. The package is surface-mount, lead-free, and moisture-sensitive level 1 (MSL1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Active-low 3-state output enable | Overrides DIR; asserts high-Z on all A/B I/O when HIGH - critical for bus arbitration and hot-swap isolation |
| 2 (DIR) | Direction control input | LOW = B→A data flow; HIGH = A→B - enables single-wire directional management of full 8-bit path |
| 3–10 (A1–A8) | Side-A bidirectional I/O | Connects to Bus A; functions as input or 3-state output depending on DIR/OE - supports mixed-mode interface |
| 11 (GND) | Ground reference | Primary return path for all signals and power - must be low-inductance connection to minimize ground bounce |
| 12–19 (B1–B8) | Side-B bidirectional I/O | Connects to Bus B; mirrors A-side behavior - allows symmetrical bus coupling without external logic |
| 20 (VCC) | Power supply | 3.3 V nominal supply; decoupling capacitor (0.1 µF) required within 5 mm for stable switching performance |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | VOH ≥ VCC–0.2 V and VOL ≤ 0.4 V at 24 mA - maximizes noise margin in 3.3 V systems with marginal signal integrity |
| Integrated series current limiting | Reduces ground bounce and undershoot - eliminates need for external series termination resistors on PCB |
| Hysteresis on all inputs | 150 mV typical threshold hysteresis - prevents chatter on slow or noisy control lines (e.g., front-panel switches) |
| Low quiescent power | 0.4 µW typical static power - suitable for always-on monitoring subsystems with strict power budgets |
| TTL-compatible input thresholds | VIH = 2.0 V min, VIL = 0.8 V max - interoperable with legacy 5 V TTL outputs without level shifters |
Applications
| Industrial PLC Backplane Interface | Embedded MCU Memory Expansion |
|---|---|
|
Use Scenario: Isolating CPU address/data bus from modular I/O expansion slots in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional bus transceiver managing 8-bit parallel data flow between ARM Cortex-M7 core and field I/O modules. Use Value: DIR-controlled direction switching and OE-gated high-Z state enable safe hot-plug insertion and prevent bus contention during module replacement. |
Use Scenario: Extending external SRAM or flash memory interface on resource-constrained microcontrollers. IC Role / Device Role / Timing Role: Octal transceiver buffering and isolating 8-bit data bus between MCU and off-chip memory devices. Use Value: 4.6 ns propagation delay ensures setup/hold timing compliance at 20+ MHz memory access rates without added wait states. |
| Motor Drive Control Board Communication | Industrial Sensor Hub Aggregation |
|
Use Scenario: Interfacing isolated analog front-end and digital control logic across galvanically separated domains in servo drives. IC Role / Device Role / Timing Role: Level-shifting and direction-managed data bridge between 3.3 V FPGA logic and 5 V DAC/ADC interfaces. Use Value: Rail-to-rail outputs and TTL-compatible inputs eliminate external level translators, reducing component count and board area. |
Use Scenario: Consolidating data from multiple RS-485, SPI, or parallel-output sensors into a central processing unit. IC Role / Device Role / Timing Role: Bidirectional data aggregator enabling shared sensor bus access while preventing simultaneous drive conflicts. Use Value: Integrated current limiting and hysteresis suppress EMI-induced glitches common in high-noise factory-floor sensor environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bidirectional transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC245APWR | Lower drive (±24 mA), wider VCC range (1.65–3.6 V), no built-in hysteresis | Better suited for portable low-power designs; less robust in industrial noise | Choose if operating below 2.7 V or requiring lower ICC; verify noise margin with external filtering |
| 74ALVC245MTCX | Faster propagation (2.8 ns typ), higher ICCZ (20 µA max), same QSOP-20 package | Optimized for high-speed test equipment; less ideal for ultra-low-quiescent systems | Prefer when sub-3 ns timing is mandatory and power budget allows >10× higher static current |
Compared with SN74LVC245APWR and 74ALVC245MTCX, the 74FCT3245APGG8 uniquely balances industrial-grade noise immunity (hysteresis + current limiting), moderate speed (4.6 ns), and ultra-low quiescent power (10 µA max), making it optimal for cost-sensitive, noise-prone, and thermally constrained industrial control boards.
Availability
74FCT3245APGG8 is available at Aetrix Electronics and suitable for industrial PLC backplanes, embedded memory expansion, motor drive control boards, and sensor hub aggregation requiring stable component supply across extended temperature and long production lifecycles.
Supply support for 74FCT3245APGG8 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, infrastructure, and IoT applications.
The 74FCT3245APGG8 belongs to Renesas' legacy IDT logic family, designed specifically for robust, low-power, high-noise-margin bidirectional bus interfacing in industrial automation and real-time control systems.
FAQ
What is the maximum operating frequency supported by the 74FCT3245APGG8?
The 74FCT3245APGG8 does not specify a maximum clock frequency because it is an asynchronous transceiver. Its usable data rate depends on propagation delay (4.6 ns max) and system-level timing margins. In practice, it reliably supports bidirectional data transfers up to approximately 200 MHz in well-designed PCB layouts with controlled impedance and proper termination.
Does the 74FCT3245APGG8 support 5 V tolerant inputs?
Yes, the 74FCT3245APGG8 supports 5 V tolerant inputs: absolute maximum input voltage is VCC + 0.5 V (up to 4.1 V at VCC = 3.6 V), and guaranteed logic HIGH level is 2.0 V minimum - allowing direct connection to 5 V TTL outputs without external level shifting.
Can the 74FCT3245APGG8 be used in hot-swap applications?
Yes, the 74FCT3245APGG8 supports hot-swap operation via its active-low OE pin: asserting OE HIGH places all A and B I/O pins in high-impedance state before power-up or during live insertion, preventing bus contention and back-driving of powered subsystems - a key requirement in modular industrial backplanes.
What is the purpose of hysteresis on the 74FCT3245APGG8 inputs?
The 150 mV typical input hysteresis on the 74FCT3245APGG8 increases noise immunity by creating separate HIGH and LOW threshold voltages (e.g., VIH ≈ 1.55 V, VIL ≈ 1.40 V), preventing oscillation or false triggering on slow-rising or electrically noisy control signals such as those from mechanical switches or long cable runs in factory environments.
Is the 74FCT3245APGG8 pin-compatible with the 74FCT245 series?
Yes, the 74FCT3245APGG8 shares identical pinout, function mapping, and electrical behavior with other members of the FCT245 family (e.g., 74FCT245, 74FCT245A) in QSOP-20 packaging - enabling drop-in replacement where the A-version's tighter propagation delay (4.6 ns vs. 7 ns) and improved output drive are beneficial.
74FCT3245APGG8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 74FCT
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 8mA, 24mA
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
74FCT3245APGG8 FAQ
1.How can I place an order for 74FCT3245APGG8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74FCT3245APGG8 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 74FCT3245APGG8 reliable?
The price and inventory of 74FCT3245APGG8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74FCT3245APGG8 is usually 5 days.
3.What payment methods are accepted for 74FCT3245APGG8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74FCT3245APGG8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74FCT3245APGG8?
74FCT3245APGG8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74FCT3245APGG8 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 74FCT3245APGG8?
For technical support, including 74FCT3245APGG8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74FCT3245APGG8 requirements.
6.How does Aetrix verify that 74FCT3245APGG8 is sourced from the original manufacturer or authorized distributors?
All 74FCT3245APGG8 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 74FCT3245APGG8 meets industry standards.
7.What is the process for return or replacement of 74FCT3245APGG8?
All 74FCT3245APGG8 units undergo pre-shipment inspection (PSI). If there is an issue with 74FCT3245APGG8, 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 74FCT3245APGG8 part is unused and in its original packaging.
Return procedure for 74FCT3245APGG8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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