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Renesas 74FCT244ATPGG8
- Part No.:
- 74FCT244ATPGG8
- Manufacturer:
- Renesas
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74FCT244ATPGG8.pdf
- Description:
- IC BUF NON-INVERT 5.25V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,771
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Product details
Overview
74FCT244ATPGG8 from Renesas Electronics (formerly IDT) is a FAST CMOS octal buffer/line driver with 3-state outputs, designed for memory and address bus driving, clock distribution, and bidirectional data transmission in industrial systems. It features true TTL input/output compatibility (VOH = 3.3 V typ., VOL = 0.3 V typ.), high drive capability (–15 mA IOH, 64 mA IOL), and operates across –40°C to +85°C.
For engineers reviewing the 74FCT244ATPGG8 datasheet, 74FCT244ATPGG8 pinout, 74FCT244ATPGG8 application, or 74FCT244ATPGG8 equivalent, key selection criteria include industrial temperature range support, dual 4-bit 3-state enable control (OEA/OEB), SOIC-20/TSSOP-20 package compatibility, and JEDEC 18 compliance for legacy bus interface designs.
Technical Context
The 74FCT244ATPGG8 implements two independent 4-bit non-inverting buffer sections, each controlled by a dedicated active-low 3-state enable (OEA, OEB). Its dual-metal CMOS process ensures TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max) and rail-to-rail output swing under 5.0 V ±5% supply.
It delivers fast switching performance: tPLH/tPHL ≤ 4.1 ns (max) at CL = 50 pF, RL = 500 Ω; output enable/disable times (tPZH/tPHZ/tPZL/tPLZ) are ≤ 5.8 ns (max). Power-off disable functionality supports live insertion in backplane and hot-swap applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply | 5.0 V ±5% - compatible with standard TTL and 5 V logic systems without level translation |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade reliability in harsh environments |
| Output Drive | –15 mA IOH / 64 mA IOL - sufficient to drive multiple TTL loads or terminated transmission lines |
| Propagation Delay | ≤ 4.1 ns (max) - enables high-speed bus buffering up to ~200 MHz system timing margins |
| Input Leakage | ≤ ±1 µA (max) - minimizes standby current and prevents signal integrity degradation on long traces |
| Quiescent ICC | ≤ 1 mA - low static power consumption ideal for power-constrained industrial controllers |
| Capacitance | CIN ≤ 10 pF, COUT ≤ 12 pF - reduces loading on upstream drivers and improves edge fidelity |
Pinout & Package
74FCT244ATPGG8 is packaged in a 20-pin TSSOP (Thin Shrink Small Outline Package) with 0.65 mm pitch, optimized for high-density PCB layouts and automated assembly. Pin 1 is marked with a dot or notch; pin numbering follows standard counter-clockwise orientation from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | OEA, OEB | Active-low 3-state enable inputs - independently control left/right 4-bit sections; tied low for always-enabled operation |
| 2–5, 13–16 | DA0–DA3, DB0–DB3 | Data inputs - accept TTL-level signals; internally buffered and isolated from outputs when disabled |
| 6–9, 17–20 | OA0–OA3, OB0–OB3 | Non-inverting 3-state outputs - drive external buses or loads; high-impedance state when corresponding OE is HIGH |
| 10 | GND | Ground reference - must be low-inductance connection to minimize noise coupling into sensitive inputs |
| 20 | VCC | Positive supply - decoupling capacitor (0.1 µF ceramic) required within 5 mm of this pin |
Key Features
| Feature | Design Value |
|---|---|
| True TTL Input Compatibility | VIH ≥ 2.0 V, VIL ≤ 0.8 V - eliminates need for external level shifters when interfacing with legacy 74LS/ALS devices |
| High-Drive Outputs | 64 mA sink per output - directly drives 10+ TTL loads or 50 Ω transmission lines without external buffers |
| Live Insertion Support | Power-off disable behavior - outputs enter high-Z when VCC = 0 V, preventing bus contention during hot-plug events |
| JEDEC 18 Compliance | Fully meets standard for 5 V CMOS bus-interface ICs - ensures interoperability in multi-vendor industrial backplanes |
| Low Input Leakage | ≤ ±1 µA at VCC max - preserves signal integrity on unterminated or high-impedance control lines |
Applications
| Memory Address Buffering | Industrial Backplane Interface |
|---|---|
Use Scenario: Driving 16-bit address bus between microcontroller and SRAM/Flash in programmable logic controllers. IC Role / Device Role / Timing Role: Non-inverting octal buffer with dual 3-state control isolates CPU from memory during DMA cycles. Use Value: 4.1 ns max propagation delay ensures setup/hold timing margin for 25 MHz address strobes; 64 mA drive sustains signal integrity over 10 cm routed traces. | Use Scenario: Interfacing FPGA I/O banks to legacy ISA-style expansion slots in ruggedized test equipment. IC Role / Device Role / Timing Role: Bidirectional bus transceiver section (using separate DA/OA and DB/OB groups) with independent OE control. Use Value: Dual OEA/OEB pins allow synchronous enable/disable of address vs. data lanes; TTL-compatible thresholds prevent misreads from noisy slot connectors. |
| Programmable Logic Clock Distribution | Automated Test Equipment (ATE) Signal Conditioning |
Use Scenario: Fan-out and level-shifting of 50 MHz system clock from oscillator module to multiple CPLD clock inputs. IC Role / Device Role / Timing Role: Low-skew, non-inverting buffer with matched tPLH/tPHL ensuring <100 ps inter-output skew. Use Value: 10 pF max input capacitance minimizes clock source loading; 3.3 V VOH (typ.) meets VIH requirements of modern 3.3 V CPLDs powered from same 5 V rail. | Use Scenario: Isolating and strengthening digital stimulus signals from pattern generator to DUT in semiconductor ATE racks. IC Role / Device Role / Timing Role: Output driver stage providing robust 64 mA drive into 50 Ω coaxial cabling and relay matrix inputs. Use Value: High-current sinking capability maintains clean logic LOWs despite cable capacitance and contact resistance; industrial temp rating ensures stability across thermal cycling in production testers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer/line driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74F244N | Lower drive (–15 mA/48 mA), no live-insertion support, wider propagation delay (15 ns max) | Suitable only for low-speed legacy boards; lacks industrial temp rating and JEDEC 18 compliance | Select only if cost-sensitive and operating below 10 MHz with existing 74F footprint |
| 74ACT244PC | Higher VCC range (4.5–5.5 V), faster tPLH (3.5 ns typ.), but higher ICC (2.5 mA max) and no MIL/IND grade marking | Better for speed-critical designs but less suited for extended temperature or high-reliability deployments | Prefer when maximum speed is critical and thermal environment is controlled |
Compared with SN74F244N and 74ACT244PC, the 74FCT244ATPGG8 uniquely balances industrial temperature operation, live-insertion safety, JEDEC 18 compliance, and 64 mA drive-making it optimal for upgrade paths from 74F in deployed industrial hardware where reliability and backward compatibility are mandatory.
Availability
74FCT244ATPGG8 is available at Aetrix Electronics and suitable for industrial automation controllers, programmable logic systems, and ruggedized test equipment requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 74FCT244ATPGG8 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 74FCT244ATPGG8 belongs to Renesas' legacy IDT FAST CMOS logic family, engineered specifically for high-reliability industrial bus interface and memory subsystem applications where TTL compatibility, drive strength, and temperature resilience are essential.
FAQ
What is the maximum operating frequency supported by the 74FCT244ATPGG8?
The 74FCT244ATPGG8 does not specify a maximum operating frequency in its datasheet because it is a combinational buffer-not a clocked device. However, its 4.1 ns maximum propagation delay supports reliable operation with input signal edges up to approximately 200 MHz in well-terminated systems. System-level timing depends on load capacitance, trace impedance, and drive strength; actual usable frequency must be validated per board layout and signal integrity analysis for the 74FCT244ATPGG8.
Does the 74FCT244ATPGG8 support hot-swap or live insertion?
Yes, the 74FCT244ATPGG8 supports live insertion due to its power-off disable feature: when VCC = 0 V, all outputs automatically enter high-impedance state regardless of OE or input levels. This prevents bus contention during hot-plug events in backplane or modular industrial systems. The 74FCT244ATPGG8 achieves this via internal circuitry that overrides OE logic under zero-supply conditions, as confirmed in the Absolute Maximum Ratings and Functional Description sections.
What are the recommended decoupling practices for the 74FCT244ATPGG8?
Each 74FCT244ATPGG8 requires a minimum 0.1 µF ceramic decoupling capacitor placed within 5 mm of the VCC pin (pin 20) and connected to the nearest GND pin (pin 10) using short, low-inductance traces. For systems with multiple 74FCT244ATPGG8 devices or high-frequency switching, add a bulk 4.7 µF tantalum or aluminum electrolytic capacitor per 5–10 ICs on the same 5 V rail. These practices suppress supply noise and maintain stable VOH/VOL levels under dynamic 64 mA output transitions in the 74FCT244ATPGG8.
Can the 74FCT244ATPGG8 drive 50 Ω transmission lines directly?
Yes, the 74FCT244ATPGG8 can drive 50 Ω transmission lines directly: its 64 mA output sink capability exceeds the 100 mA peak required for a 5 V signal into 50 Ω (V = IR → 5 V / 50 Ω = 100 mA), and its output structure is designed for controlled-edge driving into capacitive and resistive loads. While not a dedicated line driver IC, the 74FCT244ATPGG8's VOL ≤ 0.55 V at 48 mA (military) and 64 mA (industrial) ensures valid LOW logic levels even under such loads-verified in the OUTPUT DRIVE CHARACTERISTICS table.
Is the 74FCT244ATPGG8 RoHS compliant and lead-free?
Yes, the 74FCT244ATPGG8 is RoHS compliant and lead-free. The ordering information in the datasheet confirms "Green" packaging (suffix 'G') and notes RoHS-compliant materials were implemented in revisions after September 2009. The TSSOP-20 package (PGG suffix) uses matte tin lead finish, and the device meets EU RoHS Directive 2011/65/EU and JEDEC JS709E requirements. Full compliance documentation is available through Renesas' official product page for the 74FCT244ATPGG8.
74FCT244ATPGG8 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:
- Buffer, Non-Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 4
- 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
74FCT244ATPGG8 FAQ
1.How can I place an order for 74FCT244ATPGG8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74FCT244ATPGG8 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 74FCT244ATPGG8 reliable?
The price and inventory of 74FCT244ATPGG8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74FCT244ATPGG8 is usually 5 days.
3.What payment methods are accepted for 74FCT244ATPGG8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74FCT244ATPGG8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74FCT244ATPGG8?
74FCT244ATPGG8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74FCT244ATPGG8 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 74FCT244ATPGG8?
For technical support, including 74FCT244ATPGG8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74FCT244ATPGG8 requirements.
6.How does Aetrix verify that 74FCT244ATPGG8 is sourced from the original manufacturer or authorized distributors?
All 74FCT244ATPGG8 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 74FCT244ATPGG8 meets industry standards.
7.What is the process for return or replacement of 74FCT244ATPGG8?
All 74FCT244ATPGG8 units undergo pre-shipment inspection (PSI). If there is an issue with 74FCT244ATPGG8, 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 74FCT244ATPGG8 part is unused and in its original packaging.
Return procedure for 74FCT244ATPGG8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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