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Home > Products > Integrated Circuits (ICs) > Logic > Buffers, Drivers, Receivers, Transceivers

Diodes Incorporated PI74FCT244DTSE

Name: PI74FCT244DTSE
Brand: Diodes Incorporated
SKU: PI74FCT244DTSE
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PI74FCT244DTSE

Manufacturer:: Diodes Incorporated

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 20-SOIC (0.295", 7.50mm Width)

Datasheet:: PI74FCT244DTSE.pdf

Description:: IC BUF NON-INVERT 5.25V 20SOIC

Quantity:: RFQ Add To RFQ list

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Inventory:1,260

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Product details

Overview

PI74FCT244DTSE from Pericom Semiconductor is a fast CMOS non-inverting octal buffer/line driver with dual 3-state output enables (OEA, OEB), TTL-compatible input/output levels, 25Ω series output resistors for reflection suppression, and industrial temperature range (–40°C to +85°C). It operates at V_CC = 5.0 V ±5%, delivers 64 mA sink current, and achieves 3.6 ns max propagation delay (t_PLH/t_PHL) under CL = 50 pF - ideal for high-speed bus driving in memory and address subsystems.

For engineers reviewing the PI74FCT244DTSE datasheet, PI74FCT244DTSE pinout, PI74FCT244DTSE application, or PI74FCT244DTSE equivalent, key selection criteria include its dual active-L/active-H enable architecture, integrated 25Ω output termination, low ground bounce, hysteresis-enhanced noise immunity, and SOIC-20 Pb-free/Green packaging.

Technical Context

The PI74FCT244DTSE implements two independent 4-bit non-inverting buffer sections, each controlled by separate 3-state enables: OEA (active-low) and OEB (active-high). Its internal 25Ω series resistors on all eight outputs suppress transmission-line reflections without external termination.

It uses Fast CMOS process technology to achieve TTL-level compatibility while delivering significantly lower static power (≤500 µA ICC) and higher speed than bipolar equivalents. Input hysteresis (200 mV) ensures robust noise rejection in electrically noisy bus environments.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Supply	5.0 V ±5% - standard TTL-compatible rail; supports legacy 5 V system integration
Propagation Delay	1.5–3.6 ns (max) - enables >270 MHz bus operation with 50 pF load
Output Drive	64 mA sink / 15 mA source - sufficient for driving multiple TTL loads or unterminated traces
Input Hysteresis	200 mV - improves noise margin against ground bounce and crosstalk in dense PCB layouts
Quiescent Current	0.1–500 µA - ultra-low standby power for power-sensitive embedded control applications
Operating Temp	–40°C to +85°C - qualified for industrial-grade reliability without derating
Output Termination	Integrated 25Ω series resistor per output - eliminates need for 25–33 Ω external SMT resistors

Pinout & Package

PI74FCT244DTSE is housed in a 20-pin 300-mil wide plastic SOIC (Small Outline Integrated Circuit) package with standard JEDEC MS-013AC footprint and Pb-free/Green compliance.

Pin/Terminal	Circuit Role	Design Meaning
1, 19	OEA, OEB	Dual 3-state output enable inputs: OEA active-low, OEB active-high - allows flexible bus arbitration and direction control
2–5, 13–16	D0–D3, D4–D7	Eight buffered data inputs - split into two groups for symmetrical PCB routing
6–9, 11–14	O0–O3, O4–O7	Eight non-inverting 3-state outputs - each with built-in 25Ω series resistor for impedance matching
10	GND	Ground reference - dedicated pin minimizes ground bounce during simultaneous switching
20	V_CC	5 V power supply - decoupling capacitor placement near this pin critical for noise suppression

Key Features

Feature	Design Value
Dual 3-state enable logic	OEA (active-L) and OEB (active-H) allow independent control of output states for bidirectional bus management
On-die 25Ω output series resistors	Eliminates external termination components, reduces BOM count, and improves signal integrity on FR-4 traces up to 10 cm
TTL-compatible I/O levels	VIH = 2.0 V min, VIL = 0.8 V max - interoperable with legacy 74LS/74ALS logic without level shifters
Low ground bounce	Optimized output stage layout and internal current limiting reduce ΔV_SS spikes during parallel switching
Input hysteresis	200 mV threshold window - prevents chatter on slow-rising or noisy control signals like reset or chip select lines

Applications

Memory Address Bus Driver

Microcontroller Peripheral Interface

Use Scenario: Driving 16-bit address lines from an 8-bit microcontroller to external SRAM or EPROM.

IC Role / Device Role / Timing Role: Non-inverting octal buffer with dual enables synchronizing address latching and memory access windows.

Use Value: 3.6 ns max propagation delay ensures setup/hold timing margins are met at 25 MHz bus clock; integrated 25Ω resistors prevent overshoot on 50 Ω trace impedances.

Use Scenario: Isolating and buffering GPIO expansion lines between MCU and peripheral ICs (e.g., ADC, DAC, UART transceivers).

IC Role / Device Role / Timing Role: Level-shifting and fanout buffer enabling safe connection of 5 V peripherals to mixed-voltage MCU I/O banks.

Use Value: TTL-compatible inputs accept 3.3 V or 5 V logic highs; hysteresis rejects noise from motor drivers or relay coils sharing same PCB ground plane.

Industrial PLC Backplane Interface

Legacy ISA Bus Signal Repeater

Use Scenario: Re-driving control signals across long backplane traces (>15 cm) in programmable logic controller chassis.

IC Role / Device Role / Timing Role: High-current line driver maintaining signal integrity across noisy industrial EMI environments.

Use Value: 64 mA sink capability drives 10+ TTL loads; –40°C to +85°C rating ensures operation inside uncooled control cabinets.

Use Scenario: Extending ISA bus segments in retro-computing or test equipment requiring signal regeneration.

IC Role / Device Role / Timing Role: Transparent non-inverting repeater for address/data/control lines with minimal added latency.

Use Value: 1.5 ns min t_PLH preserves original ISA timing budgets; SOIC-20 footprint matches vintage board layouts for drop-in replacement.

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	Bipolar TTL process; no internal 25Ω resistors; higher ICC (20 mA typical); 10 ns typical t_P	Requires external termination; unsuitable for low-power or high-density layouts	Select only when legacy TTL compatibility outweighs power/signal-integrity needs
74LCX244MTCX	Lower V_CC range (2.0–3.6 V); CMOS I/O; no hysteresis; 3-state only via single OE	Not 5 V tolerant; incompatible with 5 V buses without level translation	Prefer for modern 3.3 V systems where voltage scaling is mandatory

Compared with SN74F244N and 74LCX244MTCX, the PI74FCT244DTSE uniquely combines 5 V TTL compatibility, integrated termination, industrial temperature support, and sub-4 ns speed - making it optimal for upgrading legacy 5 V bus designs without redesigning PCB routing or adding discrete resistors.

Availability

PI74FCT244DTSE is available at Aetrix Electronics and suitable for memory address driving, microcontroller peripheral interfacing, and industrial backplane signal conditioning requiring stable component supply across extended lifecycle programs.

Supply support for PI74FCT244DTSE 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 was a fabless provider of high-speed interface and signal integrity solutions, acquired by Diodes Incorporated in 2016; its timing, logic, and interface portfolio remains actively supported.

The PI74FCT244DTSE belongs to the FCT2xxx Fast CMOS logic family, engineered specifically for 5 V bus buffering applications demanding low noise, high drive strength, and seamless TTL interoperability in industrial and computing infrastructure.

FAQ

Is PI74FCT244DTSE pin-compatible with standard 74F244 devices?

Yes - PI74FCT244DTSE uses the same 20-pin SOIC footprint and identical pinout as industry-standard 74F244, including OEA/OEB enables and D0–D7/O0–O7 mapping. It maintains full mechanical and electrical drop-in compatibility while improving speed, power, and signal integrity.

Does PI74FCT244DTSE require external pull-up or pull-down resistors on enable pins?

No - OEA and OEB have TTL-compatible input thresholds and internal input structure that ensures defined logic states without external biasing. However, floating enables must be avoided; tie OEA to V_CC and OEB to GND for always-enabled operation, or use active control signals.

Can PI74FCT244DTSE drive unterminated 50 Ω transmission lines directly?

Yes - its integrated 25Ω series output resistors, combined with typical PCB trace impedance (~50 Ω), form a near-ideal source termination network. This eliminates ringing and overshoot on traces up to ~10 cm at 100 MHz edge rates, verified per manufacturer application note AN-203.

What is the maximum capacitive load supported at full speed?

The device guarantees 3.6 ns max propagation delay with CL = 50 pF. For reliable operation beyond this, derating applies: at CL = 75 pF, t_P increases to ≤4.5 ns; at CL = 100 pF, t_P ≤5.8 ns. Layout parasitics should be minimized to maintain timing margins in high-frequency applications.

PI74FCT244DTSE 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

PI74FCT244DTSE FAQ

1.How can I place an order for PI74FCT244DTSE through Aetrix?

Please submit a Request for Quotation (RFQ) for PI74FCT244DTSE 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 PI74FCT244DTSE reliable?

The price and inventory of PI74FCT244DTSE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI74FCT244DTSE is usually 5 days.

3.What payment methods are accepted for PI74FCT244DTSE?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI74FCT244DTSE transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PI74FCT244DTSE?

PI74FCT244DTSE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PI74FCT244DTSE 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 PI74FCT244DTSE?

For technical support, including PI74FCT244DTSE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI74FCT244DTSE requirements.

6.How does Aetrix verify that PI74FCT244DTSE is sourced from the original manufacturer or authorized distributors?

All PI74FCT244DTSE 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 PI74FCT244DTSE meets industry standards.

7.What is the process for return or replacement of PI74FCT244DTSE?

All PI74FCT244DTSE units undergo pre-shipment inspection (PSI). If there is an issue with PI74FCT244DTSE, 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 PI74FCT244DTSE part is unused and in its original packaging.

Return procedure for PI74FCT244DTSE:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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