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Renesas 74FCT3244ASOG
- Part No.:
- 74FCT3244ASOG
- Manufacturer:
- Renesas
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74FCT3244ASOG.pdf
- Description:
- IC BUF NON-INVERT 3.6V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:408
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Product details
Overview
74FCT3244ASOG from Renesas Electronics is a 3.3V CMOS octal buffer/line driver with dual-nibble 3-state control, 4.8 ns max propagation delay (FCT3244A variant), ±60 mA output drive, and industrial temperature range (–40°C to +85°C). It serves as a memory data/address driver, clock driver, or bus-oriented transmitter/receiver in embedded control and industrial I/O systems.
For engineers reviewing the 74FCT3244ASOG datasheet, 74FCT3244ASOG pinout, 74FCT3244ASOG application, or 74FCT3244ASOG equivalent, key selection criteria include its 3.3V supply tolerance (2.7V–3.6V), rail-to-rail output swing for noise margin, low static power (0.4 µW typ.), and SOIC-20 package compatibility with legacy 74-series layouts.
Technical Context
The 74FCT3244ASOG implements two independent 4-bit groups (1A–1Y and 2A–2Y), each controlled by separate active-low 3-state enables (1OE, 2OE), enabling flexible nibble- or byte-wide bus management. Its hysteresis-equipped inputs improve noise immunity in noisy industrial environments.
Designed using 0.5 µm CMOS technology, it delivers TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max) while maintaining CMOS power efficiency and ESD robustness (>2000 V HBM, >200 V MM).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7 V to 3.6 V - supports wide 3.3 V system tolerance without external regulation |
| Max Propagation Delay | 4.8 ns (tPLH/tPHL, CL = 50 pF) - enables high-speed bus buffering up to ~200 MHz data rates |
| Output Drive | ±60 mA (IODH/IODL at VO = 1.5 V) - drives heavy capacitive loads or multiple TTL inputs |
| Input Hysteresis | 150 mV - suppresses false triggering on slow or noisy address/data lines |
| Static ICC | 0.1 µA typ. - negligible quiescent current for low-power standby modes |
| Operating Temp | –40°C to +85°C - qualified for industrial automation, motor control, and factory I/O |
| ESD Rating | >2000 V HBM, >200 V MM - withstands handling and board-level transients without protection diodes |
Pinout & Package
74FCT3244ASOG is housed in a 20-pin SOIC package (PSG20 footprint, 0.300" body width, 1.27 mm pitch), compatible with standard 74-series PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low 3-state enable inputs - independently disable Group 1 (pins 2–5, 11–14) or Group 2 (pins 6–9, 15–18) |
| 2–5, 6–9 | 1A1–1A4, 2A1–2A4 | Data inputs - accept TTL/CMOS logic levels with hysteresis for noise rejection |
| 11–14, 15–18 | 1Y1–1Y4, 2Y1–2Y4 | 3-state outputs - rail-to-rail swing (VOL ≤ 0.4 V at 24 mA, VOH ≥ 2.4 V at –8 mA) ensures noise margin |
| 10 | GND | Ground reference - decoupling capacitor placement critical for switching noise suppression |
| 20 | VCC | 3.3 V power supply - requires local 0.1 µF ceramic bypass near pin 20 |
Key Features
| Feature | Design Value |
|---|---|
| Dual-nibble 3-state control | Independent 1OE/2OE pins allow selective activation of upper/lower 4-bit lanes - simplifies partial bus gating without glue logic |
| Rail-to-rail output swing | VOH ≥ 2.4 V at –8 mA, VOL ≤ 0.4 V at 24 mA - maximizes noise margin in mixed-voltage systems |
| Hysteresis on all inputs | 150 mV threshold hysteresis - eliminates chatter on slow-rise signals like reset or status lines |
| Low dynamic power | ICCD = 60 µA/MHz - reduces total system power in high-frequency address/data buffering |
| SOIC-20 drop-in replacement | Pinout and timing match legacy 74F/74ACT244 - enables direct upgrade from 5 V to 3.3 V systems |
Applications
| Industrial PLC I/O Expansion | Memory Address Buffering |
|---|---|
|
Use Scenario: Isolating and driving 8-bit parallel I/O ports between microcontroller and field-side relays/sensors in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional buffer with independent nibble enables acts as level-shifting interface between 3.3 V MCU and 24 V industrial backplane. Use Value: ±60 mA drive strength sustains signal integrity across long traces; hysteresis rejects EMI from nearby contactors and VFDs. |
Use Scenario: Buffering 8-bit segments of CPU address bus to multiple SRAM or flash devices in embedded instrumentation. IC Role / Device Role / Timing Role: Low-propagation-delay (4.8 ns) line driver ensures setup/hold timing margins are preserved across memory decode paths. Use Value: Rail-to-rail output swing maintains full logic swing at SRAM inputs despite trace capacitance and fanout loading. |
| Industrial Clock Distribution | Legacy Bus Interface Adapter |
|
Use Scenario: Fan-out and impedance matching of system clocks (e.g., 25–50 MHz) to multiple FPGA configuration or ADC sampling clocks. IC Role / Device Role / Timing Role: Non-inverting buffer with matched tPLH/tPHL minimizes skew between clock destinations. Use Value: 4.8 ns max delay and <1 ns skew enable synchronous multi-device sampling within 1 ns timing budget. |
Use Scenario: Adapting 3.3 V microcontroller GPIOs to legacy 5 V peripheral buses (e.g., ISA-style expansion slots or industrial displays). IC Role / Device Role / Timing Role: Level-tolerant input (VIH = 2.0 V min) accepts 5 V TTL signals; 3.3 V outputs interface safely to modern MCUs. Use Value: Eliminates need for discrete level shifters - reduces BOM count and layout area in retrofit designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74LVC244APW | Lower drive (±24 mA), wider VCC (1.65–3.6 V), no hysteresis, TSSOP-20 only | Suitable for low-power portable systems but lacks noise immunity for industrial settings | Prefer 74FCT3244ASOG where EMI resilience and ±60 mA drive are required |
| SN74AHCT244N | 5 V only (4.5–5.5 V), higher ICC (20 µA typ.), no hysteresis, PDIP/SOIC-20 | Requires level shifting when interfacing with 3.3 V MCUs; not drop-in for 3.3 V rails | Select 74FCT3244ASOG for native 3.3 V operation without voltage translation |
Compared with 74LVC244APW and SN74AHCT244N, the 74FCT3244ASOG uniquely combines industrial temperature rating, hysteresis-enhanced noise immunity, and ±60 mA drive in a 3.3 V SOIC-20 package - making it optimal for ruggedized embedded bus interfaces where reliability outweighs ultra-low power.
Availability
74FCT3244ASOG is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, memory address buffering, and clock distribution requiring stable component supply across extended temperature and long production lifecycles.
Supply support for 74FCT3244ASOG 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 is a global semiconductor leader delivering microcontrollers, analog, power, and connectivity solutions for automotive, industrial, and enterprise applications.
The 74FCT3244ASOG belongs to Renesas' FCT logic family - engineered for high-speed, low-noise 3.3 V bus interfacing in industrial control, test equipment, and communications infrastructure.
FAQ
What is the maximum operating voltage for the 74FCT3244ASOG?
The 74FCT3244ASOG operates over an extended VCC range of 2.7 V to 3.6 V, with normal operation specified at 3.3 V ±0.3 V. Absolute maximum terminal voltage is VCC + 0.5 V on outputs and I/O pins, and +4.6 V on VCC pins - exceeding these limits risks permanent damage. The 74FCT3244ASOG must never be powered from 5 V rails without level translation.
Does the 74FCT3244ASOG support hot-swap or live-insertion?
No, the 74FCT3244ASOG does not support hot-swap. Its absolute maximum ratings specify that VCC must be stable before applying input signals, and simultaneous application of inputs before VCC can cause latch-up or excessive ICCZ. The 74FCT3244ASOG requires power sequencing where VCC is established prior to asserting any input or enable signals.
Can the 74FCT3244ASOG drive multiple TTL loads directly?
Yes, the 74FCT3244ASOG can drive up to 10 standard TTL loads per output due to its ±60 mA drive capability and rail-to-rail output swing. At VO = 1.5 V, it sources –60 mA and sinks 90 mA (min), exceeding the –0.4 mA/1.6 mA requirements of legacy TTL. This eliminates need for additional drivers in mixed-logic systems.
Is the 74FCT3244ASOG pin-compatible with older 74F244 or 74ACT244 devices?
Yes, the 74FCT3244ASOG uses the same SOIC-20 pinout as 74F244 and 74ACT244, including identical 1OE/2OE placement and A/Y mapping. However, it operates at 3.3 V only and features hysteresis and lower ICC - making it a functional and mechanical drop-in replacement in 3.3 V designs, but not in 5 V systems.
What is the significance of hysteresis in the 74FCT3244ASOG inputs?
The 150 mV input hysteresis in the 74FCT3244ASOG prevents metastability and false toggling on slowly rising/falling signals - such as those from mechanical switches, optocouplers, or long unterminated traces in industrial environments. This feature is confirmed in the datasheet's DC electrical characteristics table and directly improves system reliability without external Schmitt triggers.
74FCT3244ASOG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 74FCT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 4
- 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-SOIC
74FCT3244ASOG FAQ
1.How can I place an order for 74FCT3244ASOG through Aetrix?
Please submit a Request for Quotation (RFQ) for 74FCT3244ASOG 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 74FCT3244ASOG reliable?
The price and inventory of 74FCT3244ASOG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74FCT3244ASOG is usually 5 days.
3.What payment methods are accepted for 74FCT3244ASOG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74FCT3244ASOG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74FCT3244ASOG?
74FCT3244ASOG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74FCT3244ASOG 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 74FCT3244ASOG?
For technical support, including 74FCT3244ASOG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74FCT3244ASOG requirements.
6.How does Aetrix verify that 74FCT3244ASOG is sourced from the original manufacturer or authorized distributors?
All 74FCT3244ASOG 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 74FCT3244ASOG meets industry standards.
7.What is the process for return or replacement of 74FCT3244ASOG?
All 74FCT3244ASOG units undergo pre-shipment inspection (PSI). If there is an issue with 74FCT3244ASOG, 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 74FCT3244ASOG part is unused and in its original packaging.
Return procedure for 74FCT3244ASOG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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