SN74BCT25244DWG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The SN74BCT25244DWG4 is an octal 25-ohm bus buffer and line driver from Texas Instruments featuring integrated 25-ohm series termination resistors for incident wave switching on high-speed backplane and bus lines. It delivers 188mA output drive current with active-low output enable control in a 24-pin SOIC package. Ideal for driving long PCB traces, backplane buses, and transmission line interconnects in computing and telecommunications equipment.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 24
- Lifecycle
- OBSOLETE
- Datasheet
- SN74BCT25244DWG4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Integrated 25-ohm series termination resistors for incident wave switching on controlled-impedance buses
- High output drive of 188 mA (IOL) for driving heavy backplane bus loads
- Octal unidirectional buffer with active-low output enable control
- BCT logic family combines BiCMOS output strength with CMOS input compatibility
- 50 pF load capacitance support for reliable high-speed bus driving
- 24-pin SOIC package for surface-mount assembly in high-density bus driver designs
Applications
The SN74BCT25244DWG4 is used in high-speed backplane bus drivers, VMEbus and PCI signal interfaces, and long-trace PCB bus lines where integrated 25-ohm series termination reduces reflection and ringing on controlled-impedance transmission lines. Computing servers, network switches, and telecom equipment use this device to drive address and data buses with signal integrity maintained over long interconnects. It also serves in memory bus driver stages and FPGA-to-backplane interface circuits where both high output drive and impedance matching are simultaneously required.
Specifications
| 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 |
| JESD-609 Code | e4 |
| 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,.4 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| 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 Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| 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 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SN74BCT25244DWG4:
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 significance of the 25-ohm series resistors in the SN74BCT25244DWG4?
The integrated 25-ohm series termination resistors in the SN74BCT25244DWG4 are designed to match the output impedance of the driver to the characteristic impedance of transmission lines on the PCB. This incident wave switching technique eliminates signal reflections and ringing on controlled-impedance bus traces, improving signal integrity on high-speed buses operating above 50 MHz without requiring external termination resistors.
What is the output drive current of the SN74BCT25244DWG4?
The SN74BCT25244DWG4 provides a maximum output low current (IOL) of 188mA, one of the highest drive strengths available in the BCT logic family. This high drive capability is essential for backplane bus applications where multiple bus loads must be driven simultaneously over long trace lengths with sufficient noise margins.
What package is the SN74BCT25244DWG4 available in?
The SN74BCT25244DWG4 is packaged in a 24-pin SOIC (Small Outline Integrated Circuit) wide-body package, JESD-30 code R-PDSO-G24. This surface-mount package provides the pin count needed for 8-bit data, two enable signals, and supply connections, and is compatible with standard automated PCB assembly processes.
Is the SN74BCT25244DWG4 suitable for use in high-speed bus applications?
Yes, the SN74BCT25244DWG4 is specifically designed for high-speed bus applications. The combination of BiCMOS output drivers for high current drive, integrated 25-ohm series termination for impedance matching, and the BCT logic family's fast propagation characteristics makes it well-suited for driving 50-ohm and 75-ohm controlled-impedance buses in backplane systems, memory interfaces, and data communication equipment.
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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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