SN74CBTLV3257DG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The SN74CBTLV3257DG4 is a low-voltage 4-channel 2-to-1 multiplexer/demultiplexer bus switch from Texas Instruments in a 16-pin SOIC package. It features bidirectional 3.3 V CBTLV bus switching with active-low enable and 30 pF rated load capacitance for high-speed data routing.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- SN74CBTLV3257DG4 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
What are the key features of SN74CBTLV3257DG4?
- 4-function, 4-channel 2:1 mux/demux bus switch for bidirectional data routing
- Low-voltage CBTLV family operation compatible with 2.5 V and 3.3 V logic
- Active-low enable control simplifies bus arbitration logic
- 30 pF load capacitance rating for signal integrity on high-speed buses
- 16-pin SOIC package with 8 inputs for compact board routing
What is SN74CBTLV3257DG4 used for?
The SN74CBTLV3257DG4 is used in processor and FPGA board designs for multiplexing data buses, address lines, or peripheral signals between two source/destination paths at 2.5 V or 3.3 V logic levels. Its near-zero propagation delay and bidirectional switching make it suitable for memory bus expansion, I2C/SPI bus routing, and test-point multiplexing in embedded systems.
What are the specifications of SN74CBTLV3257DG4?
| YTEOL | 0 |
| Control Type | ENABLE LOW |
| Count Direction | BIDIRECTIONAL |
| Family | CBTLV/3B |
| JESD-30 Code | R-PDSO-G16 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 30pF |
| Logic IC Type | BUS EXCHANGER |
| Number of Bits | 2 |
| Number of Functions | 4 |
| Number of Inputs | 1 |
| Number of Outputs | 2 |
| Number of Ports | 3 |
| Output Characteristics | 3-STATE |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP16,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | BULK |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 0.01mA |
| Prop. Delay@Nom-Sup | 0.15ns |
| Propagation Delay (tpd) | 0.25ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 3.6V |
| Supply Voltage-Min (Vsup) | 2.3V |
| Supply Voltage-Nom (Vsup) | 2.5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| 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 SN74CBTLV3257DG4 datasheet?
SN74CBTLV3257DG4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SN74CBTLV3257DG4?
Compatible alternatives and drop-in replacements for SN74CBTLV3257DG4:
Bus Exchanger, CBTLV/3B Series, 4-Func, 2-Bit, True Output, CMOS, PDSO16
Frequently Asked Questions
How many channels and what switching width does the SN74CBTLV3257DG4 provide for bus routing?
The SN74CBTLV3257DG4 provides 4 independent channels each switching 2 bits, for a total of 8 inputs in a 16-pin SOIC package. This allows simultaneous bidirectional routing of a full byte bus (8-bit) between two destinations by using a single device with one active-low enable control signal.
What logic voltage levels does the SN74CBTLV3257DG4 support, and is it compatible with 1.8 V systems?
The SN74CBTLV3257DG4 is rated for 2.3 V to 3.6 V supply voltage (nominally 2.5 V or 3.3 V), so it is not directly compatible with 1.8 V-only logic without level translation. For 1.8 V interfacing, a dedicated level-shifting bus switch or voltage translator in the CBT or SN74AVC family should be selected instead.
What load capacitance is specified for the SN74CBTLV3257DG4, and why does this matter for signal integrity?
The SN74CBTLV3257DG4 is rated for 30 pF load capacitance per channel, which limits the RC time constant on the switched bus lines. Staying within this 30 pF budget prevents excessive signal edge rounding that would violate setup/hold times on downstream logic operating at frequencies above 50 MHz in typical SPI or parallel bus applications.
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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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