SN74BCT25244NSRG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The SN74BCT25244NSRG4 is a 24-pin octal bus driver from Texas Instruments BCT family featuring 25-ohm incident wave switching for controlled impedance drive. It provides unidirectional buffering with active-low output enable and 188 mA sink current. Packaged in a 24-pin SOP for high-speed backplane bus driving applications.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 24
- Lifecycle
- OBSOLETE
- Datasheet
- SN74BCT25244NSRG4 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
- 25-ohm incident wave switching for controlled impedance drive on unterminated bus lines
- High sink current capability of 188 mA per output for heavy backplane loads
- Active-low output enable for bus gating and tri-state control
- BCT/FBT family: BiCMOS technology balancing speed and drive strength
- 24-pin SOP package with 50 pF load capacitance rating
Applications
The SN74BCT25244NSRG4 is designed for high-speed backplane data bus driving in workstation motherboards, embedded computing systems, and multi-board VME or CompactPCI architectures. Its 25-ohm incident wave switching prevents reflections on unterminated bus lines, making it essential in high-frequency data bus designs where signal integrity is critical.
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 |
| 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 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SN74BCT25244NSRG4:
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 incident wave switching and why does the SN74BCT25244NSRG4 use it?
Incident wave switching means the output driver's source impedance is matched (25 ohms) to the bus transmission line impedance, so the driven signal reaches its final logic level in a single wavefront without reflections. This is critical in high-speed backplane bus designs where unterminated stubs would cause signal integrity problems and data errors at fast bus speeds.
How much output current can the SN74BCT25244NSRG4 sink?
Each output can sink up to 188 mA (I(ol) max), which is significantly higher than standard HC or AHC logic. This high sink current is necessary to drive heavy backplane loads, multiple receiver inputs, and long PCB trace capacitances at speeds required by high-performance embedded computing bus architectures.
What logic family does the SN74BCT25244NSRG4 belong to?
It belongs to the BCT (BiCMOS Technology) family, which combines bipolar and CMOS elements to achieve high drive strength and fast switching with low static power consumption. BCT devices are specifically designed for bus driving applications where high sink current and controlled output impedance are more important than minimal quiescent power.
Is the SN74BCT25244NSRG4 RoHS compliant?
Yes. The G4 suffix indicates compliance with Texas Instruments' green product requirements. The SN74BCT25244NSRG4 is lead-free and RoHS compliant, making it suitable for use in commercial and industrial electronics products that must meet current environmental regulations in global markets.
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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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