SN74AHC244DBR Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The SN74AHC244DBR is an octal 3-state non-inverting buffer/line driver from Texas Instruments AHC family, operating from 2V to 5.5V with 8mA output drive current. Available in a 20-pin SSOP package with active-low output enable and 50pF load capacitance. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- SN74AHC244DBR Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.1789(MOQ 10)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SN74AHC244DBR?
- Octal (8-bit) unidirectional bus driver with 3-state outputs for high-capacity bus buffering
- AHC family wide voltage range 2V to 5.5V operation with CMOS-compatible inputs and outputs
- 8mA output drive current (IOL) in compact 20-pin SSOP package for space-efficient PCB designs
- RoHS compliant JESD-609 e4 lead-free halogen-free construction for environmental compliance
What is SN74AHC244DBR used for?
The SN74AHC244DBR is used extensively in microprocessor bus buffering, memory interface circuits, and data path isolation in embedded systems and industrial controllers. Its unidirectional operation with active-low output enable makes it ideal for address bus drivers, peripheral interface buffers, and signal isolation between different PCB sections. The wide 2V to 5.5V operating range enables use in both 3.3V and 5V logic systems without additional level-shifting components.
What are the specifications of SN74AHC244DBR?
| Pbfree Code | Yes |
| YTEOL | 15 |
| Control Type | ENABLE LOW |
| Count Direction | UNIDIRECTIONAL |
| Family | AHC/VHC/H/U/V |
| JESD-30 Code | R-PDSO-G20 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | BUS DRIVER |
| Max I(ol) | 0.008A |
| 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 | SSOP20,.3 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, SHRINK PITCH |
| Packing Method | TR, 13 INCH |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 0.04mA |
| Prop. Delay@Nom-Sup | 8.5ns |
| Propagation Delay (tpd) | 13.5ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 2V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
| Country of Origin | Malaysia |
Where can I find the SN74AHC244DBR datasheet?
SN74AHC244DBR Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SN74AHC244DBR?
Compatible alternatives and drop-in replacements for SN74AHC244DBR:
Bus Driver, AHC/VHC/H/U/V Series, 8-Func, 4-Bit, True Output, CMOS, PDSO20
Bus Driver, AHC/VHC/H/U/V Series, 2-Func, 8-Bit, True Output, CMOS, PDSO48
Frequently Asked Questions
What is the operating voltage range of the SN74AHC244DBR?
The SN74AHC244DBR operates from a supply voltage (VCC) range of 2V to 5.5V, making it compatible with both 3.3V and 5V CMOS logic systems. The AHC family uses CMOS-compatible input thresholds, with VIH minimum at 70% of VCC and VIL maximum at 30% of VCC, enabling reliable operation across the full voltage range.
What package does the SN74AHC244DBR use?
The SN74AHC244DBR is packaged in a 20-pin SSOP (Shrink Small Outline Package), as indicated by the DBR suffix. The SSOP package has a 0.65mm lead pitch and is significantly smaller than standard 20-pin SOIC packages, making it ideal for space-constrained PCB designs while maintaining surface-mount compatibility.
How is the output enable controlled on the SN74AHC244DBR?
The SN74AHC244DBR has two active-low output enable pins (1OE and 2OE) that control two groups of four outputs each. When both OE pins are low, all 8 outputs are active. When either OE pin is high, the corresponding 4 outputs enter high-impedance state. This allows flexible bus control with the ability to independently enable or disable halves of the device.
What is the difference between SN74AHC244 and SN74AHCT244?
The SN74AHC244 uses CMOS-compatible input thresholds referenced to VCC (approximately 1.5V at 3.3V operation), while the SN74AHCT244 uses fixed TTL-compatible input thresholds (VIH min 2.0V, VIL max 0.8V). Use the AHC version for pure CMOS systems and the AHCT version when interfacing with TTL outputs in 5V systems, such as legacy microprocessor buses.
What is the maximum output drive current of the SN74AHC244DBR?
The SN74AHC244DBR provides a maximum output low current (IOL) of 8mA and output high current (IOH) of -8mA at 5V operation. The load capacitance specification is 50pF for propagation delay measurements. This drive strength is suitable for most standard logic loads and short PCB trace runs typical in embedded system designs.
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Why Buy from FindMyChip
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.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 10+ | $0.2580 | $2.58 |
| 25+ | $0.2300 | $5.75 |
| 100+ | $0.2100 | $21.00 |
| 100000+ | $0.1789 | $17890.00 |
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