SN74CBT3245CPW Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The SN74CBT3245CPW is an 8-bit CBT-family FET bus switch from Texas Instruments featuring bidirectional switching with near-zero propagation delay and active-low output enable control. It supports 50pF load capacitance, operates from 3.3V supply, and is packaged in a 20-pin TSSOP for compact bus isolation designs. Ideal for data bus switching, processor-to-peripheral routing, and signal multiplexing in computing and embedded systems.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- SN74CBT3245CPW Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 8-bit bidirectional FET bus switch with near-zero propagation delay
- Active-low output enable (OE) for simple bus control and isolation
- CBT logic family provides transparent pass-gate switching behavior
- 50 pF load capacitance support for reliable high-speed bus driving
- 20-pin TSSOP package for compact PCB layouts in dense digital designs
- Lead-free and RoHS compliant (JESD-609 e4) for global environmental compliance
Applications
The SN74CBT3245CPW is widely used in microprocessor bus switching, memory interface routing, and data path multiplexing applications in embedded computing and consumer electronics. It provides transparent bidirectional data switching without signal delay, making it suitable for SRAM, DRAM, and Flash memory bus connections in embedded Linux systems and industrial controllers. PCIe add-in card designs and test equipment front ends also use this device for signal isolation and bus sharing between multiple functional blocks.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Control Type | ENABLE LOW |
| Count Direction | UNIDIRECTIONAL |
| Family | CBT/FST/QS/5C/B |
| JESD-30 Code | R-PDSO-G20 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | BUS DRIVER |
| Number of Bits | 8 |
| Number of Functions | 8 |
| Number of Ports | 2 |
| Output Characteristics | 3-STATE |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP20,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Packing Method | TUBE |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 0.003mA |
| Prop. Delay@Nom-Sup | 0.15ns |
| Propagation Delay (tpd) | 0.24ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 4V |
| 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 |
| Trigger Type | POSITIVE EDGE |
| 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 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SN74CBT3245CPW:
Bus Driver, CBT/FST/QS/5C/B Series, 8-Func, 8-Bit, True Output, CMOS, PDSO20
Frequently Asked Questions
What is the bit width of the SN74CBT3245CPW?
The SN74CBT3245CPW is an 8-bit bus switch, providing eight bidirectional FET switch channels in a single package. All eight bits are controlled simultaneously by the active-low output enable (OE) signal, enabling the entire 8-bit bus to be connected or isolated as a unit for straightforward bus management.
Is the SN74CBT3245CPW bidirectional?
Yes, the SN74CBT3245CPW is a bidirectional bus switch. Its FET pass-gate architecture allows current to flow equally in both directions through each switch channel, eliminating the need for direction control signals. This makes it ideal for transparent bus sharing between processors and peripherals that alternate between read and write bus cycles.
What package does the SN74CBT3245CPW use?
The SN74CBT3245CPW is available in a 20-pin TSSOP (Thin Shrink Small Outline Package) with a 0.65mm pitch, identified by the JESD-30 code R-PDSO-G20. The TSSOP-20 package provides a compact surface-mount footprint suitable for high-density PCB designs and is compatible with standard automated pick-and-place assembly.
What is the propagation delay of the SN74CBT3245CPW?
As a CBT-family FET bus switch, the SN74CBT3245CPW exhibits near-zero propagation delay — typically less than 0.25ns — because signal transmission occurs through a MOSFET pass gate rather than through active logic stages. This minimal delay makes the device effectively transparent in timing-critical bus architectures.
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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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