SN74CBT16811CDLG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments SN74CBT16811CDLG4 is a 24-bit FET bus switch with active-low enable control and 50 pF load capacitance rating in a 56-pin SOIC package. From $2.50 in stock, worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 56
- Lifecycle
- OBSOLETE
- Datasheet
- SN74CBT16811CDLG4 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 SN74CBT16811CDLG4?
- 24-bit unidirectional FET bus switch with near-zero propagation delay for transparent data path switching
- Active-low enable control (OE) for simple glue-logic integration in multi-master bus arbitration designs
- Rated for 50 pF load capacitance enabling reliable switching of heavily loaded PCB bus lines
- 56-pin SOIC (PDSO-G56) package with lead-free (RoHS e4) finish for green-compliant assemblies
- CBT-family low on-resistance FET switches minimize signal distortion across the 24 data lines
What is SN74CBT16811CDLG4 used for?
The SN74CBT16811CDLG4 is used in high-density backplane and memory bus designs where a 24-bit FET switch must isolate or connect bus segments with minimal propagation delay. It is well suited for CPU-to-memory interfaces, PCIe slot expansion cards, and embedded computing boards where bus arbitration requires clean, low-glitch switching. Industrial control systems and server motherboards also employ it to multiplex wide parallel data buses between multiple masters or memory banks.
What are the specifications of SN74CBT16811CDLG4?
| Pbfree Code | Yes |
| YTEOL | 0 |
| Control Type | ENABLE LOW |
| Count Direction | UNIDIRECTIONAL |
| Family | CBT/FST/QS/5C/B |
| JESD-30 Code | R-PDSO-G56 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | BUS DRIVER |
| Number of Bits | 1 |
| Number of Functions | 2 |
| Number of Ports | 2 |
| Output Characteristics | 3-STATE |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SSOP56,.4 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 0.003mA |
| Prop. Delay@Nom-Sup | 0.24ns |
| Propagation Delay (tpd) | 0.24ns |
| Qualification Status | Not Qualified |
| Screening Level | AEC-Q100; TS 16949 |
| 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 |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.635mm |
| 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 SN74CBT16811CDLG4 datasheet?
SN74CBT16811CDLG4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SN74CBT16811CDLG4?
Compatible alternatives and drop-in replacements for SN74CBT16811CDLG4:
Bus Driver, CBT/FST/QS/5C/B Series, 2-Func, 1-Bit, True Output, CMOS, PDSO56
Frequently Asked Questions
How wide is the data path in the SN74CBT16811CDLG4, and what load capacitance can it drive on the bus?
The SN74CBT16811CDLG4 provides a 24-bit wide FET bus switch path, allowing 24 signals to be switched simultaneously. It is rated to drive a load capacitance of 50 pF per channel, making it suitable for moderate-length PCB traces found in CPU memory interfaces and backplane bus segments without requiring external line drivers.
What is the enable polarity of the SN74CBT16811CDLG4, and how does that simplify bus control logic?
The SN74CBT16811CDLG4 uses an active-low enable control signal, meaning the bus switch connects when the enable input is driven low. This polarity directly interfaces with open-drain bus arbitration logic and allows multiple devices to share a common active-low control bus, reducing external inverter count and simplifying board design in multi-master parallel bus systems.
For a server backplane design, what makes the SN74CBT16811CDLG4 a better choice than a standard logic buffer for switching 24 data lines?
Unlike logic buffers that introduce a fixed propagation delay and invert or re-drive signals, the SN74CBT16811CDLG4 uses FET switches for a nearly transparent data path with sub-nanosecond propagation delay. For 24 parallel lines on a server backplane operating at high clock rates, this near-zero delay prevents setup/hold timing violations that a buffered solution would cause.
What package does the SN74CBT16811CDLG4 come in, and is it RoHS compliant for lead-free assembly?
The SN74CBT16811CDLG4 is housed in a 56-pin SOIC (JESD-30 R-PDSO-G56) package with JESD-609 e4 lead-free finish, confirming RoHS compliance. The wide 56-pin SOIC body supports standard SMT reflow assembly on production PCB lines, and the G4 suffix in the part number specifically designates the green, halogen-reduced packaging option from Texas Instruments.
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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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