My Inquiry
My Account
Texas Instruments SN74ACT244N-NG
- Part No.:
- SN74ACT244N-NG
- Manufacturer:
- Texas Instruments
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
SN74ACT244N-NG.pdf
- Description:
- PROTOTYPE
- Quantity:
- Payment:
- Shipping:
Inventory:2,751
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74ACT244N-NG from Texas Instruments is an octal 3-state non-inverting buffer/driver IC designed for bus-oriented data transmission, clock distribution, and memory address driving in 5-V TTL-compatible systems. It features dual 4-bit sections with independent active-low output-enable (OE) controls, 9.5 ns maximum propagation delay at 5 V, ±24 mA output drive per channel, and operation across –40°C to +85°C.
For engineers reviewing the SN74ACT244N-NG datasheet, SN74ACT244N-NG pinout, SN74ACT244N-NG application, or SN74ACT244N-NG equivalent, key selection criteria include 5-V supply compatibility, TTL-input logic thresholds (VIH = 2 V min), high-drive capability for LED or bus loading, and PDIP-20 package suitability for prototyping and industrial control interfaces.
Technical Context
The SN74ACT244N-NG implements two independent 4-bit buffer sections, each with separate active-low OE inputs controlling high-impedance output states. Its ACT (Advanced CMOS TTL-compatible) logic family ensures robust noise immunity and fast switching while maintaining compatibility with legacy TTL signal levels.
Each buffer operates with guaranteed VOH ≥ 3.76 V and VOL ≤ 0.44 V at IOH = –24 mA / IOL = 24 mA and VCC = 4.5–5.5 V, supporting reliable interfacing with 5-V microcontrollers, FPGAs, and peripheral buses without level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - Ensures stable operation across standard 5-V rail tolerances and brown-out resilience. |
| tpd (Max) | 9.5 ns at 5 V - Enables high-speed data buffering in memory address paths and clock fanout applications up to ~100 MHz. |
| IOL / IOH | ±24 mA per output - Supports direct LED driving (with external current-limiting resistors) and robust bus termination. |
| VIH / VIL | 2.0 V / 0.8 V at VCC = 5 V - Full TTL input compatibility, eliminating need for external level translators when interfacing with legacy logic. |
| Operating Temp | –40°C to +85°C - Qualified for industrial temperature range, suitable for embedded controllers and telecom infrastructure. |
| Output State | 3-state (Hi-Z) with active-low OE - Allows bidirectional bus sharing and prevents contention in multi-driver systems. |
Pinout & Package
SN74ACT244N-NG uses a 20-pin plastic dual in-line package (PDIP-20) with 0.3-inch body width and through-hole mounting. Pin spacing is 0.1 inch, compatible with standard breadboards and PCB layouts for industrial prototyping.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low output-enable inputs - Assert high to disable corresponding 4-bit section and place outputs in high-impedance state. |
| 2, 4, 6, 8 11, 13, 15, 17 |
1A1–1A4, 2A1–2A4 | Buffer input terminals - Accept TTL-level signals; non-inverted data passed to Y outputs when OE is low. |
| 3, 5, 7, 9 12, 14, 16, 18 |
2Y4–2Y1, 1Y4–1Y1 | Buffer output terminals - Drive loads up to ±24 mA; tri-stated when respective OE is high. |
| 10 | GND | Ground reference - Must be connected to system ground plane; serves as return path for all input/output currents. |
| 20 | VCC | Positive supply - Requires 4.5–5.5 V; bypass capacitor (0.1 µF ceramic) recommended adjacent to pin for noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | Accepts VIH ≥ 2.0 V and VIL ≤ 0.8 V at 5 V - Eliminates need for external level shifters when interfacing with 74LS, 74F, or microcontroller GPIOs. |
| High-output drive | ±24 mA per channel - Sufficient to directly sink/source LED current or drive multiple TTL loads (fanout ≥ 20). |
| Low propagation delay | 9.5 ns max at 5 V - Enables use in timing-critical address/data latching and clock distribution without added latency. |
| Independent 3-state control | Dual OE pins (1OE, 2OE) - Allows selective enabling of upper/lower 4-bit groups for flexible bus partitioning and power management. |
| Industrial temperature range | –40°C to +85°C operation - Validated for deployment in factory automation, networking equipment, and industrial HMIs. |
Applications
| LED Display Drivers | Memory Address Buffers |
|---|---|
|
Use Scenario: Driving 7-segment or dot-matrix LED displays in industrial panel meters and instrumentation. IC Role / Device Role / Timing Role: Non-inverting buffer with 3-state outputs acting as segment/column drivers controlled by microcontroller GPIOs. Use Value: ±24 mA per output enables direct LED sinking/sourcing with simple series resistors; independent OE control allows multiplexed display scanning. |
Use Scenario: Isolating and strengthening address lines between microprocessor and SRAM/ROM in embedded control systems. IC Role / Device Role / Timing Role: High-speed octal buffer improving signal integrity and fanout capacity on 16-bit address buses. Use Value: 9.5 ns tpd preserves setup/hold timing margins; TTL-compatible inputs interface seamlessly with CPU address outputs. |
| Telecom Switching Networks | Industrial Bus Interfaces |
|
Use Scenario: Signal conditioning and isolation in TDM time-slot switching matrices and line card backplanes. IC Role / Device Role / Timing Role: Bidirectional bus driver enabling clean signal routing between FPGA-based switch fabric and peripheral modules. Use Value: Dual OE control permits dynamic reconfiguration of data paths; 3-state outputs prevent bus contention during hot-swap events. |
Use Scenario: Interfacing PLC I/O modules with fieldbus controllers (e.g., Modbus RTU, CAN transceivers) requiring robust 5-V logic translation. IC Role / Device Role / Timing Role: Level-shifting and current-boosting buffer between isolated digital isolators and downstream logic. Use Value: Input tolerance up to 5.5 V accommodates margin above VCC; industrial temp rating ensures reliability in harsh cabinet environments. |
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), slower (tPLH/tPHL ≈ 21 ns), higher ICC (42 mA typical), TTL-only inputs (no 5.5-V tolerance). | Legacy designs where speed and drive are less critical; not suitable for high-fanout or fast-bus applications. | Choose SN74LS244N only if backward compatibility with older LS-family boards is required and performance margins allow. |
| SN74HC244N | CMOS-based, wider VCC range (2–6 V), lower drive (±7.8 mA), slower (tPLH/tPHL ≈ 27 ns), no TTL input compatibility (VIH = 3.5 V min at 5 V). | Low-power battery-operated systems or mixed-voltage designs; unsuitable for direct TTL interface without pull-ups. | Prefer SN74HC244N only when supply voltage flexibility or static power reduction outweighs speed and drive requirements. |
Compared with SN74LS244N and SN74HC244N, the SN74ACT244N-NG delivers superior speed-to-power ratio, full TTL compatibility, and industrial-grade output drive-making it optimal for modern 5-V bus buffering where timing, noise immunity, and load capability are critical.
Availability
SN74ACT244N-NG is available at Aetrix Electronics and suitable for industrial control panels, telecom line cards, and embedded instrumentation requiring stable component supply, long-term obsolescence management, and through-hole assembly compatibility.
Supply support for SN74ACT244N-NG 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 markets.
The SN74ACT244N-NG belongs to TI's ACT (Advanced CMOS TTL-compatible) logic family, engineered for high-speed, high-drive 5-V digital interfacing in mission-critical industrial and telecom infrastructure.
FAQ
What is the maximum operating voltage for SN74ACT244N-NG?
The SN74ACT244N-NG has an absolute maximum VCC rating of 7 V, but its recommended operating range is strictly 4.5 V to 5.5 V per TI's SCAS517G datasheet. Operation outside this window risks parametric degradation or latch-up. The SN74ACT244N-NG must be powered within 4.5–5.5 V to guarantee specified timing, drive strength, and logic thresholds.
Does SN74ACT244N-NG support TTL-level inputs?
Yes, the SN74ACT244N-NG features fully TTL-compatible inputs: VIH is guaranteed ≥ 2.0 V and VIL ≤ 0.8 V at VCC = 5 V. Inputs tolerate voltages up to 5.5 V, allowing safe interfacing with standard 74LS, 74F, and microcontroller outputs without external biasing-confirming SN74ACT244N-NG as a drop-in upgrade for legacy TTL bus drivers.
Can SN74ACT244N-NG drive LEDs directly?
Yes, SN74ACT244N-NG can drive LEDs directly using its ±24 mA per-output capability. With appropriate series current-limiting resistors (e.g., 1 kΩ for ~5 mA at 5 V), it supports common-anode or common-cathode configurations. The SN74ACT244N-NG's VOL ≤ 0.44 V at 24 mA ensures minimal voltage drop and predictable brightness control.
What is the thermal resistance (RθJA) of SN74ACT244N-NG in PDIP-20 package?
The SN74ACT244N-NG in PDIP-20 (package code N) has a junction-to-ambient thermal resistance (RθJA) of 48.1°C/W, per TI's SCAS517G datasheet Section 5.4. This value assumes standard JEDEC 2S2P test board conditions and confirms adequate self-heating performance for continuous operation at full output load in ambient temperatures up to +85°C.
How are the output-enable (OE) pins configured on SN74ACT244N-NG?
The SN74ACT244N-NG has two active-low output-enable pins: 1OE (Pin 1) controls Y1–Y4 outputs, and 2OE (Pin 19) controls Y5–Y8 (labeled 2Y4–2Y1 in datasheet). When OE is low, the corresponding 4-bit buffer passes non-inverted data; when high, outputs enter high-impedance state. This dual-OE architecture enables independent control of two data lanes-critical for SN74ACT244N-NG's use in segmented bus systems.
SN74ACT244N-NG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ACT
- Package/Case:
- 20-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- 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:
- 24mA, 24mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 20-PDIP
SN74ACT244N-NG FAQ
1.How can I place an order for SN74ACT244N-NG through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ACT244N-NG 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 SN74ACT244N-NG reliable?
The price and inventory of SN74ACT244N-NG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ACT244N-NG is usually 5 days.
3.What payment methods are accepted for SN74ACT244N-NG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ACT244N-NG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ACT244N-NG?
SN74ACT244N-NG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ACT244N-NG 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 SN74ACT244N-NG?
For technical support, including SN74ACT244N-NG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ACT244N-NG requirements.
6.How does Aetrix verify that SN74ACT244N-NG is sourced from the original manufacturer or authorized distributors?
All SN74ACT244N-NG 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 SN74ACT244N-NG meets industry standards.
7.What is the process for return or replacement of SN74ACT244N-NG?
All SN74ACT244N-NG units undergo pre-shipment inspection (PSI). If there is an issue with SN74ACT244N-NG, 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 SN74ACT244N-NG part is unused and in its original packaging.
Return procedure for SN74ACT244N-NG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74ACT244N-NG 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
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…
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…
