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Renesas 74FCT244CTPYG
- Part No.:
- 74FCT244CTPYG
- Manufacturer:
- Renesas
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74FCT244CTPYG.pdf
- Description:
- IC BUF NON-INVERT 5.25V 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,001
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Product details
Overview
74FCT244CTPYG 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 74FCT244CTPYG datasheet, 74FCT244CTPYG pinout, 74FCT244CTPYG application, or 74FCT244CTPYG equivalent, key selection criteria include industrial temperature range support, 20-pin TSSOP package, dual 4-bit non-inverting 3-state output enable control, low input leakage (≤1 µA), and JEDEC 18 compliance for legacy TTL system interfacing.
Technical Context
The 74FCT244CTPYG implements two independent 4-bit non-inverting buffer sections, each controlled by a dedicated active-low 3-state enable input (OEA, OEB). Its dual-metal CMOS process ensures TTL-compatible voltage thresholds while delivering CMOS power efficiency.
It supports live insertion via power-off disable outputs and meets MIL-STD-883 Class B requirements when configured in military-grade variants. The device exhibits propagation delays as low as 4.1 ns (tPLH, tPHL) and output enable/disable times down to 5.2 ns (tPZL, tPHZ) under industrial conditions with CL = 50 pF and RL = 500 Ω.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply Voltage | 5.0 V ±5% - fixed single-rail operation compatible with legacy 5 V TTL logic domains |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments without derating |
| Output Drive | –15 mA IOH / 64 mA IOL - sufficient to drive multiple TTL loads or terminated transmission lines |
| Propagation Delay | 4.1 ns max (tPLH/tPHL) - enables reliable operation in high-speed address/data buses up to ~200 MHz |
| Input Leakage | ≤1 µA max - minimizes unintended current paths in high-impedance or battery-backed circuits |
| Input Capacitance | 10 pF max - reduces capacitive loading on upstream drivers and preserves signal edge integrity |
| Quiescent ICC | 1 mA max - maintains low static power in always-on bus interface applications |
Pinout & Package
74FCT244CTPYG is housed in a 20-pin Thin Shrink Small Outline Package (TSSOP), designated PYG20 per Renesas ordering nomenclature. This leaded surface-mount package measures 6.5 mm × 4.4 mm with 0.65 mm pitch, optimized for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | OEA, OEB | Active-low 3-state output enable inputs - independently control left/right 4-bit output groups |
| 2–5, 13–16 | DA0–DA3, DB0–DB3 | Non-inverting data inputs - accept TTL-level signals for buffering without inversion |
| 6–9, 11–14 | OB0–OB3, OA0–OA3 | 3-state buffered outputs - present high-drive, TTL-compatible outputs when enabled |
| 10 | GND | Ground reference - common return path for all internal logic and I/O |
| 20 | VCC | Positive supply - powers internal logic and provides output voltage reference |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible I/O thresholds | VIH = 2.0 V min, VIL = 0.8 V max - ensures interoperability with legacy 74LS/74ALS devices without level shifters |
| High sink/source drive | 64 mA IOL / –15 mA IOH - drives 20+ TTL unit loads or 50 Ω transmission lines directly |
| Live-insertion support | Outputs enter high-impedance state during power-down - prevents bus contention during hot-swap operations |
| JEDEC 18 compliance | Fully conforms to industry-standard AC/DC electrical specifications for 5 V logic interfaces |
| Low dynamic power | ICCD = 0.25 mA/MHz - reduces switching-induced supply noise in multi-device bus systems |
Applications
| Memory Address Bus Driver | Industrial PLC Backplane Interface |
|---|---|
Use Scenario: Driving multiplexed address lines between microcontroller and SRAM/Flash in programmable logic controllers. IC Role / Device Role / Timing Role: Non-inverting octal buffer with independent 3-state control - isolates CPU from memory during DMA cycles. Use Value: 4.1 ns propagation delay and 64 mA drive ensure clean, skew-minimized address transitions across 15 cm backplane traces. | Use Scenario: Interfacing field I/O modules to central controller over ruggedized parallel bus in factory automation cabinets. IC Role / Device Role / Timing Role: Bidirectional line driver/receiver - buffers and strengthens digital status/control signals against EMI. Use Value: Industrial temperature rating (–40°C to +85°C) and ≤1 µA input leakage maintain reliability in unconditioned control enclosures. |
| Clock Distribution Hub | Legacy System Bus Extender |
Use Scenario: Fan-out of system clock from FPGA to multiple peripheral ICs in test equipment or instrumentation. IC Role / Device Role / Timing Role: Low-skew, high-drive clock buffer - delivers synchronized timing edges with minimal jitter addition. Use Value: 5.2 ns output enable time allows precise gating of clock domains without race conditions. | Use Scenario: Extending ISA or VMEbus signal integrity in retro-computing or avionics maintenance systems. IC Role / Device Role / Timing Role: TTL-compatible bus transceiver - bridges modern controllers to legacy 5 V parallel peripherals. Use Value: True TTL VOH/VOL levels (3.3 V/0.3 V typ.) and JEDEC 18 compliance guarantee bit-perfect signal reconstruction. |
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/64 mA same), but higher ICC (15 mA max) and slower tPLH (10 ns) | Limited to commercial temp range (0°C to +70°C); not rated for industrial operation | Select only for cost-sensitive, non-industrial designs where thermal margin is guaranteed |
| 74ACT244PC | Higher speed (tPLH = 3.5 ns), but requires tighter VCC tolerance (4.5–5.5 V) and has no MIL-STD-883 option | Optimized for high-frequency digital test gear; lacks live-insertion capability | Prefer for >100 MHz clock fan-out where power supply regulation is robust |
Compared with SN74F244N and 74ACT244PC, the 74FCT244CTPYG uniquely balances industrial temperature operation, live-insertion safety, JEDEC 18 compliance, and sub-5 ns propagation-making it optimal for mission-critical embedded bus interfaces where reliability and legacy compatibility are mandatory.
Availability
74FCT244CTPYG is available at Aetrix Electronics and suitable for industrial PLC backplanes, memory subsystems, clock distribution networks, and legacy bus extension requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74FCT244CTPYG 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 74FCT244CTPYG belongs to Renesas' legacy IDT logic portfolio, engineered specifically for robust 5 V TTL system interfacing, bus isolation, and high-reliability industrial control applications where compatibility and longevity are critical.
FAQ
What is the operating temperature range specified for the 74FCT244CTPYG?
The 74FCT244CTPYG is rated for industrial temperature operation from –40°C to +85°C. This specification is validated per the datasheet's DC electrical characteristics table and applies to the C-grade variant in TSSOP packaging. The device maintains full functionality-including VOH ≥2.4 V, VOL ≤0.55 V, and tPLH ≤4.1 ns-across this entire range at VCC = 5.0 V ±5%. No derating is required within these limits.
Does the 74FCT244CTPYG support live insertion, and how is this implemented?
Yes, the 74FCT244CTPYG supports live insertion through its power-off disable feature. When VCC drops below functional threshold, outputs automatically enter high-impedance state regardless of OEA/OEB logic levels. This behavior is confirmed in the datasheet's "Power off disable outputs permit 'live insertion'" feature statement and prevents bus contention during hot-swap events in modular industrial systems. The 74FCT244CTPYG achieves this via internal circuitry that monitors VCC and forces output transistors into cutoff.
What package type does the 74FCT244CTPYG use, and what are its mechanical dimensions?
The 74FCT244CTPYG uses a 20-pin Thin Shrink Small Outline Package (TSSOP), identified as PYG20 in Renesas' ordering nomenclature. Its body dimensions are 6.5 mm × 4.4 mm with 0.65 mm lead pitch and nominal thickness of 1.2 mm. This package is RoHS-compliant, leaded, and designed for reflow soldering. Pin 1 is marked by a notch or dot, and the device orientation follows standard JEDEC TSSOP top-view conventions as shown in the datasheet's pin configuration diagram.
How many independent 3-state control inputs does the 74FCT244CTPYG have, and what do they control?
The 74FCT244CTPYG has two independent active-low 3-state output enable inputs: OEA (pin 1) and OEB (pin 19). OEA controls the OA0–OA3 outputs (pins 11–14), while OEB controls the OB0–OB3 outputs (pins 6–9). Each group operates independently, allowing selective enabling/disabling of either 4-bit segment without affecting the other. This architecture is explicitly defined in the PIN DESCRIPTION section and FUNCTION TABLE of the datasheet.
Is the 74FCT244CTPYG pin-compatible with other members of the FCT244 family, such as the 74FCT244ATPYG or 74FCT244TPYG?
Yes, the 74FCT244CTPYG shares identical pinout, package (PYG20), and functional block diagram with the 74FCT244ATPYG and 74FCT244TPYG. All three variants use the same 20-pin TSSOP footprint and terminal assignment. Differences lie solely in speed grade (C = fastest industrial, A = medium, T = standard) and associated AC timing parameters-not pin function or physical layout. This compatibility is confirmed by the unified "PIN CONFIGURATION" and "FUNCTIONAL BLOCK DIAGRAM" sections covering IDT54/74FCT244T/AT/CT collectively.
74FCT244CTPYG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 74FCT
- Package/Case:
- 20-SSOP (0.209", 5.30mm 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-SSOP
74FCT244CTPYG FAQ
1.How can I place an order for 74FCT244CTPYG through Aetrix?
Please submit a Request for Quotation (RFQ) for 74FCT244CTPYG 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 74FCT244CTPYG reliable?
The price and inventory of 74FCT244CTPYG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74FCT244CTPYG is usually 5 days.
3.What payment methods are accepted for 74FCT244CTPYG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74FCT244CTPYG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74FCT244CTPYG?
74FCT244CTPYG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74FCT244CTPYG 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 74FCT244CTPYG?
For technical support, including 74FCT244CTPYG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74FCT244CTPYG requirements.
6.How does Aetrix verify that 74FCT244CTPYG is sourced from the original manufacturer or authorized distributors?
All 74FCT244CTPYG 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 74FCT244CTPYG meets industry standards.
7.What is the process for return or replacement of 74FCT244CTPYG?
All 74FCT244CTPYG units undergo pre-shipment inspection (PSI). If there is an issue with 74FCT244CTPYG, 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 74FCT244CTPYG part is unused and in its original packaging.
Return procedure for 74FCT244CTPYG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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