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Diodes Incorporated PI74FCT2244ATS
- Part No.:
- PI74FCT2244ATS
- Manufacturer:
- Diodes Incorporated
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
PI74FCT2244ATS.pdf
- Description:
- IC BUF NON-INVERT 5.25V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,914
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Product details
Overview
PI74FCT2244ATS from Pericom Semiconductor is an octal non-inverting buffer/line driver with 3-state outputs, designed for high-speed bus driving in 5V TTL-compatible systems. It features built-in 25Ω series output resistors, industrial temperature range (–40°C to +85°C), and low ground bounce. Key specs include tPLH/tPHL ≤ 6.5 ns (max), VOL ≤ 0.50 V at 12 mA, and VIH/VIL = 2.0 V/0.8 V - enabling reliable address/data bus interfacing in memory and system clock applications.
For engineers reviewing the PI74FCT2244ATS datasheet, PI74FCT2244ATS pinout, PI74FCT2244ATS application, or PI74FCT2244ATS equivalent, this device is selected for its integrated termination, dual active-low enable control (OEA/OEB), TTL-level compatibility, and proven performance in dense PCB layouts requiring noise-suppressed 8-bit bidirectional buffering.
Technical Context
The PI74FCT2244ATS implements two independent 4-bit non-inverting buffer sections, each controlled by a dedicated active-low 3-state enable input (OEA for A-side, OEB for B-side). Its 0.6/0.8 µm CMOS process delivers speed comparable to FAST™ bipolar logic while reducing static power consumption.
All outputs integrate 25Ω series resistors to damp signal reflections on transmission lines - eliminating external termination components. Inputs include hysteresis (200 mV) for noise immunity, and the device operates strictly within 5.0 V ±5% supply, supporting TTL input thresholds and output drive levels.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Function | Octal non-inverting buffer with dual 3-state enables (OEA, OEB) |
| Propagation Delay | tPLH/tPHL ≤ 6.5 ns max (CL = 50 pF, RL = 500 Ω) - supports >100 MHz bus timing |
| Output Drive | VOL ≤ 0.50 V at IOL = 12 mA (25Ω series resistor enabled) - ensures clean low-level signaling into stubbed buses |
| Input Thresholds | VIH = 2.0 V min, VIL = 0.8 V max - fully compatible with standard TTL logic families |
| Supply Range | VCC = 5.0 V ±5% - requires stable 5V rail; not 3.3V tolerant |
| Operating Temp | –40°C to +85°C - qualified for industrial-grade embedded and computing systems |
| Quiescent Current | ICC ≤ 500 µA max - enables low-power standby in buffered address paths |
Pinout & Package
PI74FCT2244ATS is housed in a 20-pin 173 mil wide plastic TSSOP (JEDEC MO-153, package code "L") with exposed pad not electrically connected. Pin numbering follows standard dual-inline orientation (Pin 1 marked).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | OEA, OEB | Active-low 3-state enable inputs - independently control A-side (Pins 2–5, 14–17) and B-side (Pins 3–6, 13–16) outputs |
| 2, 4, 6, 14, 16, 17 | DA0–DA3, OA0–OA3 | A-side data inputs (2,4,6,14) and non-inverting outputs (16,17,3,5) - grouped for compact routing |
| 3, 5, 13, 15 | DB0–DB3, OB0–OB3 | B-side data inputs (13,15,1,18) and non-inverting outputs (3,5,13,15) - mirrored A-side layout |
| 10 | GND | Ground reference for all logic and output stages - must be low-impedance plane |
| 20 | VCC | +5V power supply - decoupling capacitor (0.1 µF) required adjacent to Pin 20 |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 25Ω series output resistors | Eliminates need for external termination on PCB traces up to 10 cm, reducing component count and layout complexity |
| TTL-compatible input and output levels | Direct drop-in replacement for 74F/74AS logic without level-shifting circuitry |
| Hysteresis on all inputs | 200 mV threshold margin suppresses noise-induced glitches on slow-rising or noisy control signals (e.g., reset, enable) |
| Low ground bounce | Minimizes simultaneous switching noise during multi-bit output transitions - critical for signal integrity in shared-bus systems |
| Industrial temperature operation | Validated performance across –40°C to +85°C ambient - suitable for fanless industrial controllers and telecom line cards |
Applications
| Memory Address Buffering | System Bus Isolation |
|---|---|
|
Use Scenario: Driving 16-bit address bus between microcontroller and SRAM/Flash in space-constrained industrial PLC modules. IC Role / Device Role / Timing Role: Non-inverting 3-state buffer providing TTL-level drive strength and propagation delay ≤6.5 ns to meet SRAM access timing. Use Value: Built-in 25Ω resistors suppress reflections on parallel address traces, eliminating 16 discrete terminators and improving board yield. |
Use Scenario: Isolating CPU data bus from peripheral expansion slots in modular test equipment. IC Role / Device Role / Timing Role: Dual-enable octal buffer enabling/disabling data flow directionally under software control (OEA/OEB as chip-select proxies). Use Value: Independent OEA/OEB pins allow asymmetric bus arbitration - e.g., CPU writes enabled while peripherals read-disabled - reducing contention risk. |
| Backplane Signal Conditioning | Legacy Interface Bridging |
|
Use Scenario: Driving differential pair stubs on 5V backplanes in telecom shelf management subsystems. IC Role / Device Role / Timing Role: High-speed line driver with controlled edge rates via internal series resistance, minimizing crosstalk into adjacent control lines. Use Value: VOL ≤0.50 V at 12 mA ensures robust low-state margin across 50 cm backplane runs with 50Ω characteristic impedance. |
Use Scenario: Interfacing modern FPGA I/O banks (5V-tolerant) to legacy ISA bus peripherals in medical imaging subsystems. IC Role / Device Role / Timing Role: Level-translating buffer preserving TTL timing margins while adding noise immunity via input hysteresis. Use Value: VIH=2.0 V / VIL=0.8 V thresholds match ISA spec exactly; hysteresis rejects EMI from adjacent motor drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal non-inverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74F244N | No integrated 25Ω resistors; higher ICCQ (2 mA typical); no input hysteresis | Requires external termination; less noise-immune on long traces or noisy environments | Select when cost is primary and board layout allows discrete termination |
| SN74LVC244APWR | 3.3V-only supply; CMOS I/O; no built-in termination; lower drive (24 mA) | Not pin- or voltage-compatible; requires level shifters for 5V systems | Select only for new 3.3V designs where power efficiency outweighs legacy interface needs |
Compared with 74F244N and SN74LVC244APWR, the PI74FCT2244ATS uniquely combines 5V TTL compatibility, on-die termination, and industrial temp rating - making it the sole choice for retrofitting noise-sensitive 5V bus systems without layout rework.
Availability
PI74FCT2244ATS is available at Aetrix Electronics and suitable for memory address buffering, system bus isolation, backplane signal conditioning, and legacy interface bridging requiring stable component supply across extended product lifecycles.
Supply support for PI74FCT2244ATS 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
Pericom Semiconductor (now part of Diodes Incorporated) specialized in high-speed interface and timing solutions, with expertise in CMOS logic, clock distribution, and signal integrity optimization.
The PI74FCT2XXX series was engineered specifically for 5V industrial and computing systems needing FAST™-class speed with CMOS power efficiency and integrated signal integrity features like on-die termination.
FAQ
Is PI74FCT2244ATS compatible with 3.3V logic inputs?
No. The PI74FCT2244ATS is a 5V-only device with TTL input thresholds (VIH = 2.0 V min, VIL = 0.8 V max). While 3.3V logic HIGH may exceed VIH in some cases, it violates the specified 5.0 V ±5% VCC requirement and risks unreliable operation or increased ICC. External level shifting is required for mixed-voltage systems.
What is the function of the two enable pins OEA and OEB?
OEA controls the 3-state output drivers for the A-side group (OA0–OA3), while OEB controls the B-side group (OB0–OB3). Both are active-low: pulling either pin LOW enables its respective outputs; pulling HIGH places them in high-impedance state. This allows independent directional control of two 4-bit data paths on a single bus.
Does the 25Ω series resistor affect maximum output current capability?
Yes. The integrated 25Ω resistor limits peak output current but ensures controlled edge rates. At IOL = 12 mA, VOL remains ≤0.50 V - sufficient for driving 50Ω transmission lines. For heavier loads (>24 mA), the resistor causes additional voltage drop; the datasheet specifies 64 mA absolute max without the resistor's effect factored in.
Can PI74FCT2244ATS be used in place of PI74FCT244T?
Yes, with mechanical and functional equivalence. Both share identical pinout, logic function, electrical specs, and package options. The "22" prefix denotes the same FCT2XXX family; "ATS" suffix confirms TSSOP-20 (L) packaging - identical to PI74FCT244ATS. No redesign or validation overhead is needed for substitution.
PI74FCT2244ATS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- 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:
- 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-SOIC
PI74FCT2244ATS FAQ
1.How can I place an order for PI74FCT2244ATS through Aetrix?
Please submit a Request for Quotation (RFQ) for PI74FCT2244ATS 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 PI74FCT2244ATS reliable?
The price and inventory of PI74FCT2244ATS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI74FCT2244ATS is usually 5 days.
3.What payment methods are accepted for PI74FCT2244ATS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI74FCT2244ATS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI74FCT2244ATS?
PI74FCT2244ATS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI74FCT2244ATS 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 PI74FCT2244ATS?
For technical support, including PI74FCT2244ATS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI74FCT2244ATS requirements.
6.How does Aetrix verify that PI74FCT2244ATS is sourced from the original manufacturer or authorized distributors?
All PI74FCT2244ATS 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 PI74FCT2244ATS meets industry standards.
7.What is the process for return or replacement of PI74FCT2244ATS?
All PI74FCT2244ATS units undergo pre-shipment inspection (PSI). If there is an issue with PI74FCT2244ATS, 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 PI74FCT2244ATS part is unused and in its original packaging.
Return procedure for PI74FCT2244ATS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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