My Inquiry
My Account
Diodes Incorporated PI74FCT2244ATQ
- Part No.:
- PI74FCT2244ATQ
- Manufacturer:
- Diodes Incorporated
- Package:
- 20-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
PI74FCT2244ATQ.pdf
- Description:
- IC BUF NON-INVERT 5.25V 20QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,902
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
PI74FCT2244ATQ from Pericom Semiconductor is an octal non-inverting 3-state buffer/line driver with TTL-compatible inputs and outputs, built-in 25 Ω series output resistors, 3.6 ns max propagation delay (at 25°C, CL = 50 pF), and industrial temperature range (–40°C to +85°C). It functions as a bidirectional bus interface component in high-speed memory and address bus systems.
For engineers reviewing the PI74FCT2244ATQ datasheet, PI74FCT2244ATQ pinout, PI74FCT2244ATQ application, or PI74FCT2244ATQ equivalent, key selection criteria include output drive strength (64 mA sink), low ground bounce, hysteresis-enabled noise immunity, and TSSOP-20 (Q) package compatibility with dense PCB layouts.
Technical Context
The PI74FCT2244ATQ implements dual 4-bit non-inverting buffers with independent active-low 3-state enable controls (OEA and OEB), supporting simultaneous or staggered bus driving. Each output integrates a 25 Ω series resistor to suppress transmission-line reflections without external termination.
It operates at 5.0 V ±5%, delivers TTL-level VOH ≥2.4 V (IOH = –15 mA) and VOL ≤0.50 V (IOL = 12 mA with 25 Ω series), and features input hysteresis (200 mV) for robust noise rejection in noisy industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | Max 3.6 ns (tPLH/tPHL, CL = 50 pF) - enables >200 MHz bus operation with timing margin. |
| Output Drive | 64 mA sink capability - drives heavy capacitive loads (e.g., 10+ TTL inputs or 50 Ω transmission lines). |
| Input Hysteresis | 200 mV - rejects fast EMI transients on address/control buses without external filtering. |
| Supply Current | Typ 3.0–6.0 mA (8-bit toggle, fI = 2.5 MHz) - balances speed and power in always-on bus interfaces. |
| Operating Voltage | 5.0 V ±5% - compatible with legacy 5 V logic families and mixed-voltage system backplanes. |
| Temperature Range | –40°C to +85°C - qualified for industrial control, telecom line cards, and embedded instrumentation. |
| Output Termination | Integrated 25 Ω series resistor per output - eliminates discrete termination resistors and saves PCB area. |
Pinout & Package
PI74FCT2244ATQ is housed in a 20-pin plastic TSSOP (150 mil width), designated Q package, with gull-wing leads and 0.65 mm pitch. Pin numbering follows standard JEDEC MS-013AC, with power/ground centrally located for low-inductance decoupling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | OEA, OEB | Active-low 3-state enable inputs - independently control upper and lower 4-bit buffer sections. |
| 2–5, 13–16 | DA0–DA3, OA0–OA3 | Upper 4-bit non-inverting data path - DAx inputs drive corresponding OAx outputs when OEA = L. |
| 6–9, 11–14 | DB0–DB3, OB0–OB3 | Lower 4-bit non-inverting data path - DBx inputs drive corresponding OBx outputs when OEB = L. |
| 10 | GND | Ground reference - must be connected to low-impedance system ground plane for stable noise performance. |
| 20 | VCC | 5 V power supply - requires local 0.1 µF ceramic decoupling capacitor within 5 mm of pin. |
Key Features
| Feature | Design Value |
|---|---|
| 25 Ω series output resistor | Eliminates need for external termination on FR-4 traces up to 10 cm, reducing BOM count and layout complexity. |
| TTL-compatible I/O levels | Direct interface with 74LS, 74ALS, and microcontroller GPIOs without level-shifting circuitry. |
| Low ground bounce | Minimizes simultaneous switching noise during multi-bit transitions, preserving signal integrity on shared VCC/GND rails. |
| Hysteresis on all inputs | Provides 200 mV noise margin against EMI-induced glitches on control lines like OEA/OEB in motor-drive environments. |
| Industrial temperature range | Validated operation from –40°C to +85°C ensures reliability in uncooled industrial enclosures and outdoor base stations. |
Applications
| Memory Address Buffering | System Bus Isolation |
|---|---|
|
Use Scenario: Driving 16-bit address bus between microcontroller and SRAM/Flash in an industrial PLC. IC Role / Device Role / Timing Role: Non-inverting buffer with independent OEA/OEB enables selective activation of upper/lower address nibbles during page-mode access. Use Value: 3.6 ns propagation delay ensures setup/hold compliance at 25 MHz bus clock; integrated 25 Ω resistors prevent overshoot on 8 cm PCB traces. |
Use Scenario: Isolating CPU data bus from peripheral expansion slots in a modular test instrument. IC Role / Device Role / Timing Role: Bidirectional bus driver with 3-state control allows CPU to read/write peripherals without contention. Use Value: 64 mA sink current supports fan-out to 10+ TTL loads; low ground bounce prevents corruption of adjacent analog measurement channels. |
| Backplane Interface Driver | Legacy Peripheral Bridge |
|
Use Scenario: Level-shifting and driving differential signaling pairs on a 5 V backplane connecting multiple DSP modules. IC Role / Device Role / Timing Role: High-speed buffer with hysteresis filters noise induced by switching power supplies on shared backplane rails. Use Value: 200 mV input hysteresis rejects 50/60 Hz magnetic coupling; industrial temp rating supports operation in 70°C chassis environments. |
Use Scenario: Interfacing modern ARM SoC GPIOs to legacy ISA-bus peripherals in medical imaging hardware. IC Role / Device Role / Timing Role: TTL-level translator and bus driver enabling protocol-agnostic data transfer between voltage domains. Use Value: 5 V tolerant inputs accept ISA bus signals directly; 25 Ω series resistors suppress ringing on long ribbon-cable runs. |
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 |
|---|---|---|---|
| SN74F244N | No integrated 25 Ω output resistors; higher ICCQ (10 mA typical); no input hysteresis. | Requires external termination; less noise-immune in EMI-heavy environments. | Select only if legacy footprint compatibility is mandatory and board-level termination is already implemented. |
| 74LCX244MTCX | 3.3 V only; 5 V tolerant inputs; 5.2 ns max tPD; no built-in series resistors. | Not pin-compatible; requires level-shifter for 5 V bus systems. | Prefer for new 3.3 V designs where lower static power (<1 µA) outweighs termination convenience. |
Compared with SN74F244N and 74LCX244MTCX, PI74FCT2244ATQ uniquely combines 5 V operation, integrated termination, hysteresis, and sub-4 ns speed-making it optimal for retrofitting high-reliability 5 V industrial backplanes without layout rework.
Availability
PI74FCT2244ATQ is available at Aetrix Electronics and suitable for memory address buffering, system bus isolation, backplane interface driving, and legacy peripheral bridging requiring stable component supply across extended product lifecycles.
Supply support for PI74FCT2244ATQ 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 for communications, computing, and industrial markets before its 2016 acquisition.
The PI74FCT2244ATQ belongs to the FCT2XXX advanced CMOS logic family, designed specifically for noise-sensitive, high-fanout 5 V bus applications demanding speed, low power, and robust signal integrity.
FAQ
What is the maximum output sink current specification for PI74FCT2244ATQ?
The PI74FCT2244ATQ is rated for 64 mA output sink current (IOL) under DC conditions with 25 Ω series resistance, verified at VOL ≤0.50 V. This enables direct drive of multiple TTL loads or 50 Ω transmission lines without external buffers, and is specified across the full industrial temperature range (–40°C to +85°C) at VCC = 5.0 V ±5%.
Does PI74FCT2244ATQ require external pull-up or pull-down resistors on OEA/OEB pins?
No external resistors are required on OEA or OEB. These are active-low TTL-compatible inputs with guaranteed VIH ≥2.0 V and VIL ≤0.8 V, and internal input hysteresis (200 mV) ensures clean state transitions even with slow-rising enable signals. Pulling them directly to VCC or GND via MCU GPIOs is sufficient for most applications.
Can PI74FCT2244ATQ operate reliably at 5.5 V supply?
No. The absolute maximum supply voltage is +7.0 V, but the device is characterized and guaranteed only over VCC = 5.0 V ±5% (4.75 V to 5.25 V). Operation at 5.5 V exceeds the recommended operating condition and may cause increased ICC, timing skew, or accelerated wear-out-especially at elevated temperatures.
How does the integrated 25 Ω series resistor affect signal rise/fall times?
The 25 Ω resistor, combined with typical PCB trace capacitance (~5–10 pF), forms a controlled RC network that damps high-frequency ringing without significantly degrading edge rates. Measured tPLH/tPHL remains ≤3.6 ns (CL = 50 pF), confirming the resistor optimizes signal integrity-not speed reduction-for real-world 5 V bus topologies.
PI74FCT2244ATQ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- 74FCT
- Package/Case:
- 20-SSOP (0.154", 3.90mm 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-QSOP
PI74FCT2244ATQ FAQ
1.How can I place an order for PI74FCT2244ATQ through Aetrix?
Please submit a Request for Quotation (RFQ) for PI74FCT2244ATQ 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 PI74FCT2244ATQ reliable?
The price and inventory of PI74FCT2244ATQ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI74FCT2244ATQ is usually 5 days.
3.What payment methods are accepted for PI74FCT2244ATQ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI74FCT2244ATQ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI74FCT2244ATQ?
PI74FCT2244ATQ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI74FCT2244ATQ 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 PI74FCT2244ATQ?
For technical support, including PI74FCT2244ATQ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI74FCT2244ATQ requirements.
6.How does Aetrix verify that PI74FCT2244ATQ is sourced from the original manufacturer or authorized distributors?
All PI74FCT2244ATQ 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 PI74FCT2244ATQ meets industry standards.
7.What is the process for return or replacement of PI74FCT2244ATQ?
All PI74FCT2244ATQ units undergo pre-shipment inspection (PSI). If there is an issue with PI74FCT2244ATQ, 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 PI74FCT2244ATQ part is unused and in its original packaging.
Return procedure for PI74FCT2244ATQ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PI74FCT2244ATQ 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
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…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
