SN74AHC244DWIn StockTexas Instruments
SN74AHC244DW is a 20-pin SOIC octal buffer/line driver with 3-state outputs from Texas Instruments AHC logic family; operates 2V–5.5V, up to 170MHz, −40°C to 85°C; from $0.417/unit, in-stock, 1pc minimum, ships worldwide.
- Manufacturer
- Texas Instruments
- Package
- SOIC-20
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- SN74AHC244DW Datasheet PDF
- Category
- logic-gates
- Price
- From $0.3475(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Octal (8-channel) buffer/line driver with 3-state outputs for bus isolation
- Wide supply voltage range: 2V to 5.5V for multi-voltage system compatibility
- High-speed AHC logic: up to 170MHz switching frequency
- Low power consumption with CMOS technology
- Industrial temperature range: −40°C to 85°C
- 20-pin SOIC-20 (DW) package for standard PCB footprint
- Output enable (OE) active-low control for bus sharing
Applications
Widely used in bus buffering and signal isolation between MCU I/O banks and peripherals in industrial controllers and communication equipment. Also common in data bus expansion for FPGA/CPLD designs, memory address buffering, and driving high-capacitance backplane lines in server and networking hardware.
Specifications
| Supply Voltage | 2 to 5.5V |
| Number of Channels | 8 |
| Max Propagation Delay | 5.5ns |
| Max Operating Frequency | 170MHz |
| Output Current (IOH) | -8mA |
| Output Current (IOL) | 8mA |
| Operating Temperature Min | -40°C |
| Operating Temperature Max | 85°C |
| Package | SOIC-20 |
| Pin Count | 20 |
| Package | SOIC-20 |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SN74AHC244DW:
Same SOIC-20 pinout, HC logic family (5V-only, lower speed vs AHC); direct drop-in for 5V-only designs
LVC variant operating 1.65–3.6V; compatible footprint, preferred for 3.3V low-power designs
Frequently Asked Questions
What is the SN74AHC244DW used for?
The SN74AHC244DW is an octal (8-channel) buffer and line driver with 3-state outputs. It is used to isolate or buffer digital buses, drive high-capacitance loads, and interface signals between logic sections operating at different drive strengths. Common applications include MCU-to-peripheral bus buffering, FPGA I/O expansion, memory address bus driving, and backplane signal distribution in industrial and communications equipment.
What voltage does the SN74AHC244DW operate at?
The SN74AHC244DW operates across a wide supply voltage range of 2V to 5.5V, making it compatible with both 3.3V and 5V logic systems. This flexibility simplifies level-compatible bus interfacing in mixed-voltage designs without external level shifters.
What package is the SN74AHC244DW in?
The SN74AHC244DW is available in a 20-pin SOIC (Small Outline Integrated Circuit) package, also known as the DW suffix in Texas Instruments naming. The SOIC-20 has a 1.27mm pin pitch and a body width of 7.5mm, suitable for standard SMT PCB assembly. The same IC is also available in TSSOP-20 (PW suffix) for more compact designs.
What are the main alternatives to the SN74AHC244DW?
Pin-compatible and functionally equivalent alternatives include: 74HC244 series (lower speed, 5V-only), SN74AHCT244DW (AHCT variant for 5V-to-3.3V translation), 74LVC244A (1.65V–3.6V, ultra-low voltage), and 74ABT244 (BiCMOS, higher drive current for heavy bus loads). For drop-in replacement in SOIC-20, the SN74HC244DW or SN74LVC244ADWR are common substitutes.
Is the SN74AHC244DW RoHS compliant?
Yes, the SN74AHC244DW is RoHS compliant and lead-free (Pb-free). Texas Instruments' DW package suffix parts use a matte-tin (Sn) lead finish, meeting EU RoHS Directive 2011/65/EU and REACH substance restrictions. The part is suitable for use in environmentally conscious product designs.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.4170 | $0.42 |
| 13+ | $0.3475 | $4.52 |
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