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Renesas 74FCT244CTPGG
- Part No.:
- 74FCT244CTPGG
- Manufacturer:
- Renesas
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74FCT244CTPGG.pdf
- Description:
- IC BUF NON-INVERT 5.25V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,756
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Product details
Overview
74FCT244CTPGG 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 bus interfacing 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 74FCT244CTPGG datasheet, 74FCT244CTPGG pinout, 74FCT244CTPGG application, or 74FCT244CTPGG equivalent, key selection criteria include industrial temperature range support, dual 4-bit 3-state enable control (OEA/OEB), SOIC-20 package footprint, JEDEC 18 compliance, and live-insertion capability enabled by power-off disable outputs.
Technical Context
The 74FCT244CTPGG implements two independent 4-bit non-inverting buffer sections, each controlled by a dedicated active-low 3-state enable (OEA for A-side, OEB for B-side). Its dual-metal CMOS process ensures CMOS power efficiency while maintaining TTL-compatible voltage thresholds and robust noise immunity (200 mV hysteresis).
It supports asynchronous output control with propagation delays as low as 4.1 ns (tPLH, tPHL) and enable/disable times down to 5.2 ns (tPZL, tPHZ) under industrial conditions (VCC = 5.0 V ±5%, TA = –40°C to +85°C), making it suitable for high-speed bus buffering where timing predictability and low skew are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply | 5.0 V ±5% - fixed single-rail operation; no dual-supply or level-shifting capability |
| Operating Temp | –40°C to +85°C - qualified for industrial environments without derating |
| IOH / IOL | –15 mA / 64 mA - drives heavy capacitive loads (e.g., >10 cm PCB traces or multiple TTL inputs) |
| tPLH / tPHL | 4.1 ns max - enables ≤240 MHz data rate on single-bit paths with margin |
| Input Leakage | ≤1 µA max - ensures stable logic levels in low-power standby or high-impedance bus states |
| Capacitance | CIN = 10 pF max, COUT = 12 pF max - minimizes switching noise and signal integrity impact |
| VOH / VOL | 2.4 V min / 0.55 V max - guarantees interoperability with standard TTL and 5 V CMOS logic families |
Pinout & Package
74FCT244CTPGG is housed in a 20-pin Plastic Gull-Wing Small Outline IC (SOIC) package (PGG20), measuring 12.8 mm × 7.5 mm × 2.65 mm, with 1.27 mm pitch and surface-mount compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | OEA, OEB | Active-low 3-state enable inputs - independently control A-side (pins 2–5, 11–14) and B-side (pins 3–6, 12–15) output drivers |
| 2–5, 11–14 | DA0–DA3, OA0–OA3 | A-side inputs and outputs - non-inverting path for first 4-bit channel; pins 2–5 = inputs, 11–14 = outputs |
| 3–6, 12–15 | DB0–DB3, OB0–OB3 | B-side inputs and outputs - non-inverting path for second 4-bit channel; pins 3–6 = inputs, 12–15 = outputs |
| 10, 20 | GND, VCC | Power reference and supply - decoupling capacitor placement near pin 20 (VCC) and pin 10 (GND) is mandatory for noise suppression |
Key Features
| Feature | Design Value |
|---|---|
| True TTL-compatible I/O | VIH = 2.0 V min, VIL = 0.8 V max, VOH = 2.4 V min at –15 mA - eliminates need for external level shifters when interfacing legacy TTL systems |
| Live insertion support | Outputs enter high-impedance state when VCC = 0 V - allows hot-swap into powered backplanes without bus contention or damage |
| Low dynamic power | ICCD = 0.25 mA/MHz max - reduces system-level heat generation during high-frequency bus toggling |
| JEDEC 18 compliance | Fully meets industry-standard AC/DC electrical requirements for 5 V logic - simplifies qualification for industrial OEM designs |
| High noise immunity | VH = 200 mV hysteresis on inputs - suppresses false triggering from EMI or ground bounce in noisy factory environments |
Applications
| Memory Address Buffering | Industrial PLC Backplane Interface |
|---|---|
Use Scenario: Driving 16-bit address lines from a microcontroller to multiple SRAM or flash devices on a shared bus. IC Role / Device Role / Timing Role: Non-inverting 3-state buffer providing fanout expansion and bus isolation between controller and memory chips. Use Value: Enables clean signal integrity over 10+ cm traces with 64 mA sink current per line, preventing address decoding errors during burst reads/writes. | Use Scenario: Interfacing a CPU module to distributed I/O cards via a ruggedized 20-pin ribbon cable backplane. IC Role / Device Role / Timing Role: Bidirectional bus driver with independent enable controls for modular slot-based communication. Use Value: Dual OEA/OEB allows per-slot enable/disable without affecting adjacent modules; live-insertion support permits field-replacement of I/O cards. |
| Legacy TTL System Upgrade | Test Equipment Signal Conditioning |
Use Scenario: Replacing obsolete 74LS244 in aging instrumentation control boards requiring extended temperature operation. IC Role / Device Role / Timing Role: Pin-compatible drop-in replacement delivering lower power and higher drive strength than LS logic. Use Value: Maintains identical pinout and logic behavior while reducing board-level power dissipation by >70% and improving noise margin by 200 mV. | Use Scenario: Conditioning digital stimulus signals from FPGA-based pattern generators before routing to DUTs with varying input thresholds. IC Role / Device Role / Timing Role: Level-shifting and current-boosting buffer ensuring consistent 5 V TTL waveforms across variable load capacitances. Use Value: 4.1 ns max propagation delay and <10 pF input capacitance preserve edge fidelity up to 100 MHz, minimizing setup/hold violations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74F244N | Lower drive (–15 mA/64 mA same), but higher ICC (10 mA typical vs. 1 mA for 74FCT244CTPGG); no live-insertion guarantee | Designed for commercial temp only (0°C to +70°C); not rated for industrial ambient extremes | Select when cost is primary and thermal environment is benign; avoid in factory automation or outdoor enclosures. |
| 74ACT244PC | Higher speed (tPLH = 3.5 ns typ.), but higher CIN (12 pF max) and no MIL-STD-883 qualification | Optimized for high-speed computing; lacks industrial temp screening and JEDEC 18 compliance documentation | Prefer for lab-grade test gear where speed outweighs reliability certification; verify layout for increased switching noise. |
Compared with SN74F244N and 74ACT244PC, the 74FCT244CTPGG uniquely balances industrial temperature resilience, ultra-low quiescent current (1 mA max), JEDEC 18 compliance, and verified live-insertion behavior-making it the optimal choice for long-lifecycle embedded control systems where field reliability is non-negotiable.
Availability
74FCT244CTPGG is available at Aetrix Electronics and suitable for industrial PLC backplanes, memory subsystems, legacy TTL upgrades, and test equipment signal conditioning requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for 74FCT244CTPGG 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 connectivity solutions for automotive, industrial, and infrastructure markets.
The 74FCT244CTPGG belongs to Renesas' legacy IDT logic portfolio, engineered specifically for robust, low-power, high-drive bus interface applications in harsh industrial environments where reliability and long-term supply stability are critical.
FAQ
What is the operating voltage range for the 74FCT244CTPGG?
The 74FCT244CTPGG operates exclusively at VCC = 5.0 V ±5%, with absolute maximum ratings from –0.5 V to +5.5 V on all terminals referenced to GND. It does not support 3.3 V or mixed-voltage operation, and its TTL-compatible inputs require VIH ≥ 2.0 V and VIL ≤ 0.8 V under industrial conditions. This fixed 5 V rail simplifies power design but mandates compatible upstream/downstream logic families.
Does the 74FCT244CTPGG support live insertion, and how is it implemented?
Yes, the 74FCT244CTPGG supports live insertion via power-off disable: when VCC = 0 V, all outputs enter a high-impedance state regardless of input or enable pin states. This behavior is guaranteed by design and verified per JEDEC 18, enabling safe hot-swap into powered backplanes without bus contention. The feature relies on internal circuitry that isolates outputs during undervoltage conditions, eliminating need for external isolation components.
What are the exact pin functions for OEA and OEB on the 74FCT244CTPGG?
On the 74FCT244CTPGG in SOIC-20 (PGG20) package, OEA is pin 1 and OEB is pin 19. Both are active-low 3-state enable inputs: asserting either LOW enables its respective 4-bit channel (OEA controls OA0–OA3 and DA0–DA3; OEB controls OB0–OB3 and DB0–DB3), while HIGH forces outputs into high-impedance. They operate independently, allowing asymmetric bus control-e.g., driving address lines while tri-stating data lines.
How does the 74FCT244CTPGG compare to the 74FCT244AT variant?
The 74FCT244CTPGG uses the "C" speed grade (max tPLH/tPHL = 4.1 ns), while the "AT" variant has slightly slower timing (max 4.8 ns). Both share identical pinout, package (PGG20), temperature range (–40°C to +85°C), and electrical specs (IOH/IOL, VOH/VOL, ICC). The "C" grade offers tighter propagation delay tolerance, making it preferable for timing-critical paths where sub-500 ps margin is required-e.g., high-speed memory interfaces or synchronous bus arbitration.
Is the 74FCT244CTPGG RoHS compliant and lead-free?
Yes, the 74FCT244CTPGG is RoHS compliant and lead-free, as confirmed by Renesas' ordering information update dated December 2016, which added green (lead-free) packaging notation (suffix "G") and removed non-RoHS part numbers. The PGG20 package uses matte tin lead finish, fully satisfying EU Directive 2011/65/EU and JESD204B material requirements for industrial applications.
74FCT244CTPGG 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:
- 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
74FCT244CTPGG FAQ
1.How can I place an order for 74FCT244CTPGG through Aetrix?
Please submit a Request for Quotation (RFQ) for 74FCT244CTPGG 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 74FCT244CTPGG reliable?
The price and inventory of 74FCT244CTPGG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74FCT244CTPGG is usually 5 days.
3.What payment methods are accepted for 74FCT244CTPGG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74FCT244CTPGG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74FCT244CTPGG?
74FCT244CTPGG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74FCT244CTPGG 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 74FCT244CTPGG?
For technical support, including 74FCT244CTPGG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74FCT244CTPGG requirements.
6.How does Aetrix verify that 74FCT244CTPGG is sourced from the original manufacturer or authorized distributors?
All 74FCT244CTPGG 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 74FCT244CTPGG meets industry standards.
7.What is the process for return or replacement of 74FCT244CTPGG?
All 74FCT244CTPGG units undergo pre-shipment inspection (PSI). If there is an issue with 74FCT244CTPGG, 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 74FCT244CTPGG part is unused and in its original packaging.
Return procedure for 74FCT244CTPGG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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