My Inquiry
My Account
Renesas 74FCT244ATPYG8
- Part No.:
- 74FCT244ATPYG8
- Manufacturer:
- Renesas
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74FCT244ATPYG8.pdf
- Description:
- IC BUF NON-INVERT 5.25V 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,260
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
74FCT244ATPYG8 from Renesas Electronics (formerly IDT) is a fast CMOS octal buffer/line driver with dual 4-bit non-inverting outputs, 3-state control via active-low OEA/OEB, ±15mA high-drive capability, and industrial temperature range (–40°C to +85°C). It serves as a memory/address bus driver and clock distribution buffer in industrial control backplanes.
For engineers reviewing the 74FCT244ATPYG8 datasheet, 74FCT244ATPYG8 pinout, 74FCT244ATPYG8 application, or 74FCT244ATPYG8 equivalent, key selection criteria include TTL-compatible input thresholds (VIL ≤ 0.8V, VIH ≥ 2.0V), low quiescent current (ICC ≤ 1mA), output disable timing (tPZL/tPHZ ≤ 5.2ns), and TSSOP-20 green RoHS-compliant packaging.
Technical Context
The 74FCT244ATPYG8 implements two independent 4-bit non-inverting buffers, each controlled by a dedicated active-low 3-state enable (OEA for A-side, OEB for B-side). Its dual-enable architecture enables selective gating of two 4-bit data paths without bus contention.
Designed using advanced dual-metal CMOS, it delivers true TTL input compatibility (VIH = 2.0V min, VOL = 0.55V max at 64mA IOL) and high noise immunity (input hysteresis VH = 200mV), meeting JEDEC Std 18 and MIL-STD-883 Class B for military-grade reliability variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply Voltage | 5.0V ±5% - fixed single-rail operation compatible with legacy 5V TTL/CMOS systems |
| Propagation Delay (tPLH/tPHL) | 4.1ns max (CL = 50pF, RL = 500Ω) - supports >100MHz bus toggle rates in address/data path buffering |
| Output Drive (IOL/IOH) | 64mA sink / –15mA source - drives heavy capacitive loads (e.g., 10+ TTL inputs or long PCB traces) |
| Input Leakage Current | ≤ ±1µA max - ensures minimal loading on upstream logic and stable DC bias in high-impedance nodes |
| 3-State Disable Time (tPLZ/tPZL) | 5.2ns max - enables fast bus turnaround in bidirectional shared-bus architectures |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments including factory automation and motor control cabinets |
| ESD Rating | ≥ 2kV HBM - provides robust handling during board assembly and field service |
Pinout & Package
74FCT244ATPYG8 is packaged in a 20-pin Thin Shrink Small Outline Package (TSSOP), pin-compatible with industry-standard SOIC-20 and SSOP-20 footprints but with 0.65mm lead pitch for higher board density.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | OEA, OEB | Active-low 3-state enable inputs - independently disable A-side (pins 2–5, 11–14) or B-side (pins 3–6, 12–15) outputs |
| 2–5, 11–14 | OA0–OA3, OB0–OB3 | Non-inverting buffered outputs - drive external buses or peripherals with 64mA sink capability |
| 3–6, 12–15 | DA0–DA3, DB0–DB3 | True TTL-compatible inputs - accept 0.8V/2.0V logic thresholds and tolerate 7V absolute max input voltage |
| 10 | GND | Ground reference - must be low-impedance connection to minimize ground bounce in high-speed switching |
| 20 | VCC | 5V power supply - requires local 0.1µF ceramic decoupling adjacent to pin for noise suppression |
Key Features
| Feature | Design Value |
|---|---|
| Live insertion support | Power-off disable outputs prevent bus contention during hot-swap module replacement in modular PLC racks |
| TTL input/output compatibility | VOH = 3.3V typ / VOL = 0.3V typ enables direct interface with legacy 74LS/74ALS logic without level-shifting |
| Low dynamic power consumption | ICCD = 0.25mA/MHz - reduces thermal load in dense backplane designs with multiple parallel drivers |
| MIL-STD-883 qualified variant available | 54FCT244AT version meets Class B screening for aerospace and defense applications requiring extended reliability |
| High noise immunity | 200mV input hysteresis suppresses false triggering from EMI-coupled transients on industrial I/O lines |
Applications
| Industrial PLC Backplane | Memory Address Buffering |
|---|---|
Use Scenario: Driving multiplexed address/data buses across modular I/O chassis with up to 12 slots and 200mm trace lengths. IC Role / Device Role / Timing Role: Non-inverting octal buffer isolating CPU address lines from distributed slot controllers while enabling 3-state arbitration. Use Value: 64mA drive strength maintains signal integrity over long PCB runs; 4.1ns propagation delay ensures setup/hold compliance at 25MHz bus clocks. | Use Scenario: Buffering 16-bit address lines between microcontroller and SRAM/Flash memory banks in embedded motion controllers. IC Role / Device Role / Timing Role: Dual 4-bit address driver providing separate enable control per memory region to reduce bus capacitance during partial access. Use Value: Independent OEA/OEB pins allow time-multiplexed addressing of four memory banks without external logic; tPZL ≤ 5.2ns enables rapid bank switching. |
| Industrial Clock Distribution | Legacy Bus Interface Adapter |
Use Scenario: Distributing 10–25MHz system clocks to multiple isolated sensor acquisition modules in harsh EMI environments. IC Role / Device Role / Timing Role: Low-skew, high-drive clock buffer with hysteresis-enhanced input for noise rejection on long clock traces. Use Value: 200mV input hysteresis prevents metastability from edge jitter; VOH/VOL specs guarantee clean 5V logic levels into 50pF loads. | Use Scenario: Interfacing modern microcontrollers with legacy ISA-style peripheral cards requiring TTL-level signaling and bus isolation. IC Role / Device Role / Timing Role: Level-translating octal buffer providing bidirectional 3-state control for shared data bus arbitration. Use Value: True TTL-compatible inputs accept 0.8V/2.0V thresholds from ISA cards; 64mA IOL drives legacy 74LS loads directly without pull-ups. |
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 (IOL = 15mA), no hysteresis, 74F bipolar process - higher ICC (22mA typical), slower (tPD = 9ns) | Limited to low-capacitance, low-speed legacy boards; not suitable for industrial backplanes with >50pF loads | Select only when replacing existing 74F244 designs with no timing or drive upgrades required |
| 74LVC244APW | 3.3V-only supply, higher speed (tPD = 3.2ns), lower drive (IOL = 24mA), different pinout (TSSOP-20 but shifted enable locations) | Requires level-shifting for 5V systems; unsuitable for mixed-voltage backplanes without additional circuitry | Prefer for new 3.3V-only designs where power efficiency and speed outweigh 5V compatibility needs |
Compared with SN74F244N and 74LVC244APW, the 74FCT244ATPYG8 uniquely balances 5V TTL compatibility, 64mA drive, 4.1ns speed, and industrial temperature rating - making it optimal for upgrading legacy industrial hardware without redesigning power or interface layers.
Availability
74FCT244ATPYG8 is available at Aetrix Electronics and suitable for industrial PLC backplanes, memory address buffering, and legacy bus interface adapters requiring stable component supply across extended product lifecycles.
Supply support for 74FCT244ATPYG8 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 74FCT244ATPYG8 belongs to Renesas' legacy IDT logic portfolio, engineered specifically for industrial and military-grade 5V bus interfacing - emphasizing robustness, noise immunity, and drop-in compatibility with standard TTL systems.
FAQ
What is the maximum capacitive load the 74FCT244ATPYG8 can drive while maintaining specified timing?
The 74FCT244ATPYG8 is characterized for CL = 50pF and RL = 500Ω, with propagation delay guaranteed ≤ 4.1ns under those conditions. It can reliably drive up to 100pF loads with marginal timing degradation, but for full spec compliance in industrial designs, keep total load ≤ 50pF including trace and input capacitance. The 64mA IOL ensures signal integrity even with moderate capacitive loading, unlike lower-drive alternatives such as the SN74F244N.
Does the 74FCT244ATPYG8 support live insertion in powered backplane systems?
Yes, the 74FCT244ATPYG8 features power-off disable outputs, meaning its outputs enter high-impedance state when VCC = 0V - preventing bus contention during hot-swap operations in modular PLC or test equipment chassis. This behavior is explicitly confirmed in the datasheet's "Features" section and validated under MIL-STD-883 Class B testing for the military-grade 54FCT244AT variant.
What are the input voltage thresholds for guaranteed logic HIGH and LOW states on the 74FCT244ATPYG8?
The 74FCT244ATPYG8 guarantees VIH ≥ 2.0V for logic HIGH and VIL ≤ 0.8V for logic LOW across its full industrial temperature range (–40°C to +85°C) and 5.0V ±5% supply. These thresholds ensure reliable interoperability with standard TTL families (74LS, 74ALS) without external biasing, and are measured per JEDEC Std 18 requirements.
Is the 74FCT244ATPYG8 RoHS compliant and what does the 'G' suffix indicate?
Yes, the 74FCT244ATPYG8 is RoHS compliant, as confirmed by the 'G' suffix in the part number and documented in Renesas' ordering information table. The 'G' denotes green (lead-free) packaging, and the 'PY' denotes TSSOP-20 package. This aligns with Renesas' 2016 datasheet revision explicitly updating ordering codes to reflect RoHS-compliant manufacturing.
How does the 74FCT244ATPYG8 differ from the 74FCT244CT variant?
The 74FCT244ATPYG8 uses the 'AT' speed grade (max tPLH/tPHL = 4.1ns), while the 'CT' variant has faster timing (max 4.6ns). Both share identical pinout, functionality, and electrical specs except propagation delay and associated enable/disable times. The 'AT' grade offers optimal balance of speed and power for most industrial applications, whereas 'CT' targets ultra-low-latency systems where every 0.5ns matters - verified in the Switching Characteristics table of the datasheet.
74FCT244ATPYG8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 74FCT
- Package/Case:
- 20-SSOP (0.209", 5.30mm 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-SSOP
74FCT244ATPYG8 FAQ
1.How can I place an order for 74FCT244ATPYG8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74FCT244ATPYG8 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 74FCT244ATPYG8 reliable?
The price and inventory of 74FCT244ATPYG8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74FCT244ATPYG8 is usually 5 days.
3.What payment methods are accepted for 74FCT244ATPYG8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74FCT244ATPYG8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74FCT244ATPYG8?
74FCT244ATPYG8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74FCT244ATPYG8 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 74FCT244ATPYG8?
For technical support, including 74FCT244ATPYG8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74FCT244ATPYG8 requirements.
6.How does Aetrix verify that 74FCT244ATPYG8 is sourced from the original manufacturer or authorized distributors?
All 74FCT244ATPYG8 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 74FCT244ATPYG8 meets industry standards.
7.What is the process for return or replacement of 74FCT244ATPYG8?
All 74FCT244ATPYG8 units undergo pre-shipment inspection (PSI). If there is an issue with 74FCT244ATPYG8, 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 74FCT244ATPYG8 part is unused and in its original packaging.
Return procedure for 74FCT244ATPYG8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74FCT244ATPYG8 Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
