SN74BCT25244NSRE4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The SN74BCT25244NSRE4 is an octal bus driver from Texas Instruments BCT family with 25-ohm incident wave switching for controlled impedance backplane drive. It supports unidirectional buffering with active-low output enable and 188 mA sink current capacity. Offered in a green, lead-free 24-pin SOP package for high-speed digital bus applications.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 24
- Lifecycle
- OBSOLETE
- Datasheet
- SN74BCT25244NSRE4 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 SN74BCT25244NSRE4?
- 25-ohm incident wave switching preventing reflections on high-speed unterminated bus lines
- 188 mA sink current per output for driving heavy backplane and multi-receiver loads
- BCT/FBT BiCMOS family combining high drive strength with CMOS-level inputs
- Active-low output enable for tri-state control and bus gating
- RoHS compliant green package with lead-free e4 JESD-609 designation
What is SN74BCT25244NSRE4 used for?
The SN74BCT25244NSRE4 is designed for high-speed backplane bus driver applications in server motherboards, industrial VME/CompactPCI systems, and embedded computing architectures. Its controlled 25-ohm output impedance eliminates bus reflections in unterminated configurations, making it essential for signal-integrity-critical bus designs operating at high data rates.
What are the specifications of SN74BCT25244NSRE4?
| Pbfree Code | Yes |
| YTEOL | 0 |
| Additional Feature | 25 OHM INCIDENT WAVE SWITCHING |
| Control Type | ENABLE LOW |
| Count Direction | UNIDIRECTIONAL |
| Family | BCT/FBT |
| JESD-30 Code | R-PDSO-G24 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | BUS DRIVER |
| Max I(ol) | 0.188A |
| 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,.3 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| Power Supply Current-Max (ICC) | 119mA |
| Prop. Delay@Nom-Sup | 6ns |
| Propagation Delay (tpd) | 6ns |
| 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 Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| HTS Code | 8542.39.00.60 |
Where can I find the SN74BCT25244NSRE4 datasheet?
SN74BCT25244NSRE4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SN74BCT25244NSRE4?
Compatible alternatives and drop-in replacements for SN74BCT25244NSRE4:
Bus Driver, BCT/FBT Series, 2-Func, 4-Bit, True Output, BICMOS, PDSO24
Bus Driver, BCT/FBT Series, 2-Func, 4-Bit, True Output, BICMOS, PDSO24
Bus Driver, BCT/FBT Series, 2-Func, 4-Bit, True Output, BICMOS, PDSO24
Frequently Asked Questions
What is the purpose of the 25-ohm incident wave switching in the SN74BCT25244NSRE4?
The 25-ohm incident wave switching is a design feature that matches the characteristic impedance of backplane transmission lines. By terminating the signal at the source with 25 ohms, it minimizes reflections and signal integrity issues that commonly occur in high-speed digital bus systems, enabling reliable data transmission at higher speeds without ringing or overshoot artifacts.
What is the maximum sink current capability of the SN74BCT25244NSRE4, and why does it matter?
The SN74BCT25244NSRE4 supports a maximum output sink current (I(ol)) of 188 mA per channel. This high sink current capability is important for driving heavily loaded bus lines and backplane interconnects where multiple receivers are connected, ensuring adequate logic-low drive strength even under worst-case load conditions.
How does the active-low output enable function work on the SN74BCT25244NSRE4?
The SN74BCT25244NSRE4 uses an active-low output enable (OE#) control. When OE# is driven low, all eight output buffers are enabled and actively drive the bus. When OE# is pulled high, the outputs enter a high-impedance (tri-state) condition, effectively disconnecting the driver from the bus and allowing other devices to take control of the bus lines without contention.
What package does the SN74BCT25244NSRE4 use, and is it RoHS-compliant?
The SN74BCT25244NSRE4 is housed in a 24-pin Small Outline Package (SOP), specifically the JESD-30 R-PDSO-G24 format. It is manufactured in a green, lead-free process and is RoHS-compliant (Pbfree Code: Yes), making it suitable for environmentally conscious designs and compliant with international restrictions on hazardous substances in electronics.
What are typical applications for the SN74BCT25244NSRE4?
The SN74BCT25244NSRE4 is well-suited for high-speed digital backplane bus driving, memory bus buffering, and multi-board communication systems where controlled impedance drive is critical. Its unidirectional buffering architecture and high sink current make it ideal for use in servers, workstations, industrial computing, and telecommunications equipment that require reliable, high-drive bus interfacing.
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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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