Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Texas Instruments SN74BCT2244N

Name: SN74BCT2244N
Brand: Texas Instruments
SKU: SN74BCT2244N
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: SN74BCT2244N

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 20-DIP (0.300", 7.62mm)

Datasheet:: SN74BCT2244N.pdf

Description:: IC BUF NON-INVERT 5.5V 20DIP

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:1,188

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

SN74BCT2244N from Texas Instruments is an octal noninverting buffer/line driver with 3-state outputs, designed for memory address and bus driving in 5-V TTL-compatible systems. It operates from 4.5 V to 5.5 V, features integrated 33-Ω series output resistors, supports ±12 mA output drive, and delivers propagation delays as low as 0.5 ns (t_PLH) at 5 V.

For engineers reviewing the SN74BCT2244N datasheet, SN74BCT2244N pinout, SN74BCT2244N application, or SN74BCT2244N equivalent, key selection criteria include 3-state bus interface capability, BiCMOS low ICCZ quiescent current, guaranteed 5-V operation, and PDIP-20 package compatibility with legacy through-hole layouts.

Technical Context

The SN74BCT2244N implements two independent 4-bit noninverting buffer sections (1A→1Y and 2A→2Y), each controlled by a dedicated active-low output-enable input (1OE, 2OE). Its BiCMOS architecture combines bipolar input stages for TTL-level compatibility and CMOS output stages with integrated 33-Ω series termination to suppress transmission-line ringing without external components.

Each output is rated for 12 mA sink/source under 5-V operation and transitions between high-impedance (Z), logic-high (VOH ≥ 2.0 V at I_OH = −12 mA), and logic-low (VOL ≤ 0.8 V at I_OL = 12 mA) states. Enable timing parameters (t_PZH, t_PZL, t_PHZ, t_PLZ) are specified down to 2.4 ns, ensuring tight bus turnaround control in high-speed memory and address path applications.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	4.5 V to 5.5 V - Ensures robust operation across standard 5-V TTL rail tolerances.
Output Drive	±12 mA - Sufficient to directly drive terminated transmission lines or multiple TTL inputs without buffering.
Propagation Delay	0.5–4.9 ns (t_PLH/t_PHL) - Enables sub-5 ns timing margins in fast address/data bus paths.
Quiescent Current	6.5–10 mA (I_CCZ) - Significantly lower than equivalent bipolar-only drivers, reducing system power during 3-state idle.
Output Series Resistance	33 Ω - Integrated on-die termination eliminates need for external series resistors on PCB traces.
Input Compatibility	TTL-level (V_IL ≤ 0.8 V, V_VIH ≥ 2.0 V) - Directly interfaces with legacy 5-V microcontrollers, FPGAs, and memory controllers.
Thermal Resistance	69 °C/W (θ_JA, PDIP) - Supports continuous operation up to 70°C ambient without forced cooling in typical board layouts.

Pinout & Package

SN74BCT2244N is housed in a 20-pin plastic dual in-line package (PDIP-N) with 0.3-inch body width and 0.1-inch lead pitch. Pin 1 is marked by a notch or dot; pins are numbered counter-clockwise from top-left corner when viewed from top with marking side up.

Pin/Terminal	Circuit Role	Design Meaning
1OE, 2OE	Active-low output enable	Controls 4-bit group (1Y1–1Y4 or 2Y1–2Y4) into high-impedance state; must be pulled high via resistor at power-up to avoid bus contention.
1A1–1A4, 2A1–2A4	Noninverting data inputs	Accept TTL-level signals; each drives corresponding Y output with unity gain and no inversion.
1Y1–1Y4, 2Y1–2Y4	3-state buffered outputs	Source/sink ±12 mA with built-in 33-Ω series resistance; electrically isolated when OE is high.
VCC (Pin 20)	Positive supply	Connects to 4.5–5.5 V rail; decoupling capacitor required near pin for noise suppression.
GND (Pin 10)	Ground reference	Common return path for all inputs, outputs, and internal circuitry; must be low-impedance connection to system ground plane.

Key Features

Feature	Design Value
BiCMOS process technology	Combines TTL input compatibility with CMOS output efficiency, reducing ICCZ by >50% versus standard BCT families.
Integrated 33-Ω series output resistors	Eliminates need for 8 external termination resistors, saving PCB area and assembly cost in bus-driver applications.
Guaranteed 3-state isolation	IOZH/IOZL ≤ ±50 μA ensures minimal leakage during high-impedance mode, preventing unintended bus loading.
High-speed enable/disable timing	tPZH/tPLZ ≤ 2.4 ns enables rapid bus arbitration in multiprocessor or DMA-controlled memory systems.
Robust absolute ratings	Withstands −0.5 V to 7 V on inputs/outputs and −55°C to +125°C storage, supporting industrial rework and extended environmental exposure.

Applications

Memory Address Buffering	Bus Transceiver Interface
Use Scenario: Driving 16-bit address bus from microcontroller to SRAM or EPROM in embedded instrumentation. IC Role / Device Role / Timing Role: Noninverting octal buffer isolating CPU address outputs from memory load; 3-state control synchronizes with memory read/write strobes. Use Value: Integrated 33-Ω resistors suppress overshoot on 50-cm PCB traces, eliminating signal integrity issues without layout redesign.	Use Scenario: Bidirectional data bus isolation between FPGA and peripheral ASIC in test equipment backplane. IC Role / Device Role / Timing Role: One-directional line driver enabling FPGA-to-peripheral writes; paired with complementary device for full bidirectional control. Use Value: Sub-5 ns propagation delay maintains setup/hold timing margins at 20 MHz bus clock rates without added wait states.
Clock Distribution Network	Legacy System Bus Expansion
Use Scenario: Fan-out of 5-V clock signal from oscillator to multiple synchronous logic blocks in avionics subsystem. IC Role / Device Role / Timing Role: Low-skew buffer replicating clock to eight destinations; 3-state capability allows dynamic clock gating during sleep modes. Use Value: Matched tPLH/tPHL (0.5–4.9 ns) minimizes inter-channel skew below 1 ns, preserving clock phase alignment across critical timing domains.	Use Scenario: Adding ISA-compatible I/O expansion to modern industrial controller using legacy peripheral cards. IC Role / Device Role / Timing Role: Level-shifting and bus-driving interface between 3.3-V controller and 5-V ISA address/data lines. Use Value: TTL-compatible inputs accept 3.3-V logic highs reliably, while 12-mA drive strength meets ISA specification minimums for address line loading.

Memory Address Buffering

Bus Transceiver Interface

Use Scenario: Driving 16-bit address bus from microcontroller to SRAM or EPROM in embedded instrumentation.

IC Role / Device Role / Timing Role: Noninverting octal buffer isolating CPU address outputs from memory load; 3-state control synchronizes with memory read/write strobes.

Use Value: Integrated 33-Ω resistors suppress overshoot on 50-cm PCB traces, eliminating signal integrity issues without layout redesign.

Use Scenario: Bidirectional data bus isolation between FPGA and peripheral ASIC in test equipment backplane.

IC Role / Device Role / Timing Role: One-directional line driver enabling FPGA-to-peripheral writes; paired with complementary device for full bidirectional control.

Use Value: Sub-5 ns propagation delay maintains setup/hold timing margins at 20 MHz bus clock rates without added wait states.

Clock Distribution Network

Legacy System Bus Expansion

Use Scenario: Fan-out of 5-V clock signal from oscillator to multiple synchronous logic blocks in avionics subsystem.

IC Role / Device Role / Timing Role: Low-skew buffer replicating clock to eight destinations; 3-state capability allows dynamic clock gating during sleep modes.

Use Value: Matched tPLH/tPHL (0.5–4.9 ns) minimizes inter-channel skew below 1 ns, preserving clock phase alignment across critical timing domains.

Use Scenario: Adding ISA-compatible I/O expansion to modern industrial controller using legacy peripheral cards.

IC Role / Device Role / Timing Role: Level-shifting and bus-driving interface between 3.3-V controller and 5-V ISA address/data lines.

Use Value: TTL-compatible inputs accept 3.3-V logic highs reliably, while 12-mA drive strength meets ISA specification minimums for address line loading.

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal 3-state buffer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LS244N	Lower drive (±15 mA), higher ICCZ (32 mA), no integrated series resistors, slower propagation (15–25 ns).	Suitable only for static or low-frequency bus loads where signal integrity is less critical.	Select when cost sensitivity outweighs speed/power requirements and external termination is acceptable.
SN74ACT244N	CMOS-based, wider VCC range (4.5–5.5 V), lower ICCZ (4 μA), but no built-in 33-Ω resistors.	Requires external series resistors for clean edge control; better for mixed-voltage systems with 3.3-V logic interfacing.	Prefer when ultra-low standby power is mandatory and board space allows discrete termination.

Compared with SN74LS244N, SN74BCT2244N delivers 5× faster switching and 3× lower quiescent current; versus SN74ACT244N, it trades off slightly higher ICCZ for guaranteed signal integrity via on-die 33-Ω resistors-critical in uncontrolled trace impedance environments.

Availability

SN74BCT2244N is available at Aetrix Electronics and suitable for memory address buffering, bus transceiver interfacing, clock distribution networks, and legacy system bus expansion requiring stable component supply and long-term industrial availability.

Supply support for SN74BCT2244N 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

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic solutions, with over 90 years of innovation in industrial, automotive, and communications electronics.

The SN74BCT2244N belongs to TI's BCT (Bipolar-CMOS Transistor) logic family, engineered specifically to replace older TTL buffers in high-density, high-speed memory and bus systems while maintaining pin compatibility and improving power efficiency.

FAQ

What is the maximum operating temperature range for SN74BCT2244N?

The SN74BCT2244N is rated for operation from 0°C to +70°C ambient temperature. This commercial-grade specification aligns with its PDIP-N packaging and intended use in industrial control panels, test equipment, and embedded computing platforms where airflow and thermal management are moderate. The device's 69 °C/W junction-to-ambient thermal resistance supports reliable operation within this range without heatsinking under typical load conditions. Always verify local board temperature rise during worst-case power dissipation scenarios involving simultaneous 3-state transitions.

Does SN74BCT2244N require external pull-up resistors on its OE pins?

Yes, SN74BCT2244N requires external pull-up resistors on both 1OE and 2OE pins to ensure defined high-impedance state during power-up or power-down sequences. TI recommends connecting OE to VCC through a resistor whose value is determined by the current-sinking capability of the driving source-typically 4.7 kΩ to 10 kΩ for standard logic drivers. Without this, undefined OE states may cause bus contention or excessive ICCZ current draw until system initialization completes. This requirement applies regardless of whether OE is driven actively or left floating in final design.

Can SN74BCT2244N interface directly with 3.3-V logic inputs?

SN74BCT2244N inputs are TTL-compatible (V_IL ≤ 0.8 V, V_IH ≥ 2.0 V), making them compatible with 3.3-V CMOS outputs that meet these thresholds-most standard 3.3-V logic families do so. However, SN74BCT2244N outputs swing rail-to-rail between GND and VCC (4.5–5.5 V), so direct connection to 3.3-V inputs requires level translation or clamping to avoid overvoltage damage. For mixed-voltage systems, pairing SN74BCT2244N with a dedicated level shifter or selecting SN74ACT244N (5-V tolerant inputs, 3.3-V compatible outputs) is recommended instead of relying on input tolerance alone.

What is the purpose of the integrated 33-Ω series resistors in SN74BCT2244N?

The integrated 33-Ω series resistors in SN74BCT2244N serve to dampen signal reflections on PCB traces by matching typical FR-4 microstrip characteristic impedance (≈50–75 Ω) in source-series termination configurations. This reduces overshoot and undershoot at output edges without requiring discrete resistors, simplifying layout and improving signal integrity in high-speed address or data bus applications. These resistors are present on all eight outputs and function identically whether sourcing or sinking current, enabling clean transitions even into unterminated or lightly loaded buses up to 20 cm in length.

Is SN74BCT2244N pin-compatible with other members of the '2244 family?

Yes, SN74BCT2244N is pin-compatible with all variants in the '2244 family sharing the same 20-pin PDIP (N), SOIC (DW), or SOP (NS) packages-including SN74BCT2244DW and SN74BCT2244NSR-as confirmed by identical pin numbering, terminal functions, and mechanical outlines in TI's SCBS017D datasheet. Electrical differences (e.g., ICCZ, propagation delay, thermal resistance) exist between BCT, LS, and ACT versions, but PCB footprints and interconnects remain interchangeable across these variants when using the same package type.

SN74BCT2244N Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74BCT

Package/Case:: 20-DIP (0.300", 7.62mm)

Packaging:: Bulk

Product Status:: Active

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:: 12mA, 12mA

Voltage - Supply:: 4.5V ~ 5.5V

Operating Temperature:: 0°C ~ 70°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 20-PDIP

SN74BCT2244N FAQ

1.How can I place an order for SN74BCT2244N through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74BCT2244N 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 SN74BCT2244N reliable?

The price and inventory of SN74BCT2244N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74BCT2244N is usually 5 days.

3.What payment methods are accepted for SN74BCT2244N?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74BCT2244N transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN74BCT2244N?

SN74BCT2244N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74BCT2244N 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 SN74BCT2244N?

For technical support, including SN74BCT2244N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74BCT2244N requirements.

6.How does Aetrix verify that SN74BCT2244N is sourced from the original manufacturer or authorized distributors?

All SN74BCT2244N 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 SN74BCT2244N meets industry standards.

7.What is the process for return or replacement of SN74BCT2244N?

All SN74BCT2244N units undergo pre-shipment inspection (PSI). If there is an issue with SN74BCT2244N, 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 SN74BCT2244N part is unused and in its original packaging.

Return procedure for SN74BCT2244N:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

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.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

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…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

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…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

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…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

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 …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

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…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

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…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

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…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

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…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

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…