SN74BCT8244ADWE4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments SN74BCT8244ADWE4 is an 8-channel non-inverting boundary scan buffer and line driver in BiCMOS, with 3-state outputs, 64 mA sink current, and 50 pF load capacity in a 24-pin SOIC package. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 24
- Lifecycle
- OBSOLETE
- Datasheet
- SN74BCT8244ADWE4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SN74BCT8244ADWE4?
- 8-channel non-inverting 3-state bus driver with 64 mA output sink current for robust line driving on high-capacitance backplanes
- Boundary scan (IEEE 1149.1 JTAG) compliant architecture enables in-system testability without physical test probes
- BiCMOS BCT-family technology balances CMOS low power with bipolar output drive strength for 50 pF load capacitance per channel
What is SN74BCT8244ADWE4 used for?
The SN74BCT8244ADWE4 is suited for board-level bus driving and buffering in computing, networking, and telecommunications systems where IEEE 1149.1 boundary scan testability is required. Its 8-channel non-inverting 3-state architecture makes it effective for address and data bus isolation in DSP and microprocessor systems operating at 3.3 V or 5 V logic levels. The 24-pin SOIC package simplifies PCB routing for multi-channel bus expansion in industrial and embedded control boards.
What are the specifications of SN74BCT8244ADWE4?
| YTEOL | 0 |
| Control Type | ENABLE LOW |
| Count Direction | UNIDIRECTIONAL |
| Family | BCT/FBT |
| JESD-30 Code | R-PDSO-G24 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | BOUNDARY SCAN BUS DRIVER |
| Max I(ol) | 0.064A |
| Number of Bits | 4 |
| Number of Functions | 2 |
| Number of Ports | 2 |
| Output Characteristics | 3-STATE |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP24,.4 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TUBE |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 52mA |
| Prop. Delay@Nom-Sup | 8.5ns |
| Propagation Delay (tpd) | 8.5ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 4.5V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | BICMOS |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| 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 |
| HTS Code | 8542.39.00.60 |
Where can I find the SN74BCT8244ADWE4 datasheet?
SN74BCT8244ADWE4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SN74BCT8244ADWE4?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What output sink current does SN74BCT8244ADWE4 provide, and how does this compare to standard CMOS bus buffers?
The SN74BCT8244ADWE4 provides 64 mA maximum output sink current per channel, more than double the typical 24 mA of standard CMOS buffers. This higher drive strength allows the device to reliably drive 50 pF bus lines at fast switching speeds in backplane applications where long trace capacitance would degrade signal integrity with lower-drive devices.
How does boundary scan compliance in SN74BCT8244ADWE4 reduce testing cost in high-volume PCB manufacturing?
By adhering to IEEE 1149.1 JTAG boundary scan, the SN74BCT8244ADWE4 allows automated in-circuit testing through a 4-wire JTAG interface without bed-of-nails fixtures, cutting test fixture costs by hundreds to thousands of dollars per board design. Boundary scan enables interconnect testing across all 8 channels in under 1 ms per scan cycle in typical JTAG chains.
When should a designer use SN74BCT8244ADWE4 instead of an octal CMOS buffer like 74HC244 in a bus isolation application?
The SN74BCT8244ADWE4 is preferred over 74HC244 when JTAG boundary scan testability is required by the design spec, or when driving heavily loaded buses with 50 pF or more per line. Its BiCMOS outputs provide 64 mA sink current versus the 74HC244 maximum of 25 mA, supporting faster edge rates on capacitive loads and longer PCB traces in 24-pin SOIC form factor.
What load capacitance does SN74BCT8244ADWE4 support per channel, and what PCB trace lengths does this imply?
The SN74BCT8244ADWE4 is rated for 50 pF load capacitance per output channel, which corresponds to PCB traces of approximately 25 to 30 cm on standard FR4 at typical trace capacitance of 1.5 to 2 pF per cm. For longer backplane traces, external series termination resistors of 33 to 100 ohm can be added to reduce reflections while maintaining acceptable drive margins.
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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.
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