SN74CBT16212CDLG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
SN74CBT16212CDLG4 is a 24-bit bidirectional bus-exchange switch from Texas Instruments in a 56-pin SSOP package. It operates with active-high enable control and supports up to 50 pF load capacitance for high-speed data bus multiplexing. Available Pb-free in stock worldwide for memory, processor, and high-density backplane bus switching designs.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 56
- Lifecycle
- OBSOLETE
- Datasheet
- SN74CBT16212CDLG4 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 SN74CBT16212CDLG4?
- 24-bit bidirectional bus-exchange switch operable as a 24-bit bus switch or 12-bit bus exchanger in a single 56-pin SSOP package
- Active-high enable control with near-zero propagation delay typical of CBT FET switch technology for transparent bus switching
- 50 pF rated load capacitance supporting high-speed memory and processor bus multiplexing at typical CBT speeds up to hundreds of MHz
What is SN74CBT16212CDLG4 used for?
SN74CBT16212CDLG4 is used in high-density backplane designs and memory subsystems where 24 data or address bus lines must be switched or exchanged between two buses with minimal added delay. Processor boards and FPGA carrier cards use it to multiplex shared memory banks or reroute address lines without discrete signal conditioning. Its dual-function capability as either a bus switch or 12-bit bus exchanger reduces the number of distinct switch ICs required in complex board designs.
What are the specifications of SN74CBT16212CDLG4?
| Pbfree Code | Yes |
| YTEOL | 0 |
| Additional Feature | ALSO OPERATES AS 24-BIT BUS SWITCH |
| Control Type | ENABLE HIGH |
| Count Direction | BIDIRECTIONAL |
| Family | CBT/FST/QS/5C/B |
| JESD-30 Code | R-PDSO-G56 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | BUS EXCHANGER |
| Number of Bits | 12 |
| Number of Functions | 2 |
| Number of Ports | 4 |
| 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) | 0.075mA |
| Prop. Delay@Nom-Sup | 0.24ns |
| 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 |
| 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 SN74CBT16212CDLG4 datasheet?
SN74CBT16212CDLG4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SN74CBT16212CDLG4?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
Can SN74CBT16212CDLG4 operate as both a 24-bit bus switch and a 12-bit bus exchanger in the same design?
Yes, SN74CBT16212CDLG4 is designed to operate either as a 24-bit bus switch (connecting 24 lines between two buses) or as a 12-bit bus exchanger (swapping two 12-bit buses simultaneously) without hardware changes. This dual-function capability reduces BOM complexity in FPGA or DSP carrier boards where both switching modes are needed across different board configurations.
What load capacitance does SN74CBT16212CDLG4 support, and how does this affect high-speed memory bus design?
SN74CBT16212CDLG4 is rated for a load capacitance of 50 pF per pin. On a high-speed memory bus running at 100 MHz or above, the FET switch pass transistors add near-zero series resistance and propagation delay, so the 50 pF bus loading budget must be allocated across PCB trace capacitance, connector stubs, and device pin capacitance to maintain signal integrity at the target bus frequency.
For a 56-pin SSOP package, how should SN74CBT16212CDLG4 be placed to minimize bus skew on a processor backplane?
In a 56-pin SSOP footprint measuring approximately 10.2 mm x 7.5 mm with 0.635 mm pitch, SN74CBT16212CDLG4 should be placed within 10 mm of the processor bus edge connector to minimize trace length differences between the 24 bit lines. Maintaining matched trace lengths within ±0.5 mm across all 24 channels and using 50 ohm controlled impedance traces limits intra-bus skew to under 100 ps at typical switching speeds.
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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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