SN74HC244DWIn StockTexas Instruments
SN74HC244DW is an octal buffer and line driver with 3-state outputs, featuring HC CMOS logic family, 150pF load capacitance, and 7.8mA output current. From $0.266, in stock worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- OBSOLETE
- Datasheet
- SN74HC244DW Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.2660(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-bit) buffer/line driver with independent 3-state outputs for high-impedance bus isolation
- HC CMOS logic family ensures low power consumption and high-speed switching performance
- Active-low output enable control for flexible bus management in bidirectional systems
- Wide supply voltage range compatible with standard 5V TTL and 3.3V CMOS logic levels
- 20-pin SOIC package (SN74HC244DW) ideal for space-constrained PCB designs
Applications
The SN74HC244DW is widely used in microprocessor bus buffering and address/data line driving applications where signal isolation and current amplification are required. It is commonly deployed in memory interface circuits, industrial control systems, and communication equipment to drive capacitive loads and extend bus lengths. The device also serves as a unidirectional level translator and fan-out expander in mixed-voltage digital systems.
Specifications
| YTEOL | 0 |
| Control Type | ENABLE LOW |
| Count Direction | UNIDIRECTIONAL |
| Family | HC |
| JESD-30 Code | R-PDSO-G20 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 150pF |
| Logic IC Type | BUS DRIVER |
| Max I(ol) | 0.0078A |
| Number of Bits | 4 |
| Number of Functions | 8 |
| Number of Ports | 2 |
| Output Characteristics | 3-STATE |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP20,.4 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TUBE |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 0.08mA |
| Prop. Delay@Nom-Sup | 29ns |
| Propagation Delay (tpd) | 210ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 6V |
| Supply Voltage-Min (Vsup) | 2V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| ## SN74HC244DW Alternates Showing results | Image |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Malaysia |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SN74HC244DW:
suggested
suggested
suggested
Frequently Asked Questions
What is the output drive current of the SN74HC244DW?
The SN74HC244DW provides a maximum output low current (IOL) of 7.8mA (0.0078A), making it suitable for driving standard CMOS and TTL loads including LEDs and bus lines with moderate capacitance up to 150pF.
How is the output enable controlled on the SN74HC244DW?
The SN74HC244DW features active-low output enable (OE) pins. When OE is pulled LOW, the outputs are active; when OE is HIGH, all eight outputs enter a high-impedance 3-state condition, effectively disconnecting the device from the bus.
What package does the SN74HC244DW use and what are its dimensions?
The SN74HC244DW comes in a 20-pin SOIC (Small Outline IC) package, designated JESD-30 code R-PDSO-G20. This surface-mount package is compact and suitable for automated PCB assembly in high-density designs.
What are common applications for the SN74HC244DW?
Typical applications include microprocessor address and data bus buffering, memory interface driving, industrial PLC I/O expansion, and digital signal fan-out in communication equipment where unidirectional signal routing and bus isolation are needed.
Is the SN74HC244DW RoHS compliant?
Yes, the SN74HC244DW is RoHS compliant. The JESD-609 code e4 indicates that the device is manufactured with lead-free (Pb-free) materials, meeting environmental standards for use in consumer and industrial electronics worldwide.
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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+ | $1.0500 | $1.05 |
| 58+ | $0.8750 | $50.75 |
| 80+ | $0.4900 | $39.20 |
| 409+ | $0.4375 | $178.94 |
| 936+ | $0.3200 | $299.52 |
| 1410+ | $0.2660 | $375.06 |
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