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Texas Instruments SN74CBT16214DL
- Part No.:
- SN74CBT16214DL
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 56-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74CBT16214DL.pdf
- Description:
- IC FET MULTI/DEMUX 12X1:3 56SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:300
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Product details
Overview
SN74CBT16214DL from Texas Instruments is a 12-bit, 1-of-3 FET bus multiplexer/demultiplexer in SSOP-56 package, featuring 5 Ω typical ON-state resistance, TTL-compatible control inputs (VIH = 2 V, VIL = 0.8 V), and 0.25 ns propagation delay at 5 V. It enables high-speed bidirectional signal routing between one common A-bus and three independent B-bus ports (B1/B2/B3) in industrial backplanes and programmable logic interconnects.
For engineers reviewing the SN74CBT16214DL datasheet, SN74CBT16214DL pinout, SN74CBT16214DL application, or SN74CBT16214DL equivalent, key selection criteria include its 12-bit 1-of-3 switching architecture, 4–5.5 V supply range, −40°C to +85°C operating temperature, 56-pin SSOP mechanical compatibility, and absence of internal current drive capability requiring external termination.
Technical Context
The SN74CBT16214DL implements a TTL-compatible 3-to-1 analog/digital bus switch using low-threshold FETs, with S0–S2 select lines determining which of the three B-port banks connects to the A-port. Its zero-power-consumption design draws only 3 µA ICC at VCC = 5.5 V with all inputs at rail.
Each channel operates bidirectionally with matched ON-resistance (4–7 Ω at 30 mA), minimal charge injection (<0.1 pC), and 7.5 pF OFF-capacitance - enabling clean signal pass-through for 100 Mbps digital buses and low-distortion analog multiplexing up to 100 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | 12-bit 1-of-3 bidirectional FET multiplexer/demultiplexer |
| ON-state resistance | 4–7 Ω at 30 mA - ensures <50 mV voltage drop under typical 12-bit bus loading |
| Propagation delay | 0.25 ns at VCC = 5 V - supports >1 GHz effective data rates in point-to-point links |
| Supply voltage | 4–5.5 V - compatible with 5 V TTL and mixed-voltage system rails |
| Operating temperature | −40°C to +85°C - qualified for industrial embedded and factory automation environments |
| ESD rating | ±1000 V HBM - meets standard handling requirements without special ESD controls |
| Input compatibility | TTL-level control (VIH ≥ 2 V, VIL ≤ 0.8 V) - interfaces directly with legacy 5 V logic families |
Pinout & Package
SN74CBT16214DL uses a 56-pin SSOP (Shrink Small Outline Package) with 10.35 mm × 18.42 mm body size and 0.5 mm lead pitch. The package features exposed thermal pad (not electrically connected) and is RoHS-compliant with NiPdAu lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| S0, S1, S2 | Control input | 3-bit binary select determining active B-port (B1/B2/B3); floating inputs must be tied to VCC or GND |
| 1A–12A | Bidirectional I/O | Common A-side bus terminals - connect to host controller or central data path |
| 1B1–12B1, 1B2–12B2, 1B3–12B3 | Bidirectional I/O | Three independent B-port banks - each 12-bit group routes to separate peripheral, memory, or FPGA bank |
| VCC | Power supply | Single 4–5.5 V supply for all switch channels; requires local 0.1 µF bypass capacitor |
| GND (Pins 8, 19, 38, 49) | Ground reference | Four dedicated ground pins minimize ground bounce across 12-bit switching activity |
Key Features
| Feature | Design Value |
|---|---|
| Low ON-resistance | 5 Ω typical - reduces insertion loss and maintains signal integrity on 50 Ω PCB traces |
| No internal current drive | Passive FET switch - eliminates shoot-through risk and simplifies level-shifting in mixed-voltage systems |
| TTL-compatible control | VIH = 2 V, VIL = 0.8 V - eliminates need for level translators when driven by standard 5 V logic |
| High-speed switching | 0.25 ns tPD at 5 V - enables use in high-throughput data acquisition and real-time sensor aggregation |
| Low OFF-capacitance | 7.5 pF - minimizes crosstalk and loading on inactive B-port channels during multiplexed operation |
Applications
| Factory Automation Backplane | Programmable Logic Interconnect |
|---|---|
Use Scenario: Routing sensor data streams from 12-channel analog front-ends to multiple PLC modules via shared backplane. IC Role / Device Role / Timing Role: 12-bit 1-of-3 bus switch selecting among three isolated I/O expansion slots under microcontroller control. Use Value: Enables dynamic reconfiguration of measurement paths without hardware changes or relay wear-out. |
Use Scenario: Expanding limited FPGA I/O pins to interface with three separate memory banks (SRAM, Flash, EEPROM). IC Role / Device Role / Timing Role: Bidirectional bus selector connecting FPGA data bus to one of three memory devices based on address decode. Use Value: Eliminates need for three sets of tristate buffers and reduces PCB layer count in space-constrained logic modules. |
| Consumer Audio Signal Routing | A/D-DAC Conversion Interface |
Use Scenario: Switching 12-bit digital audio streams between DSP core, Bluetooth codec, and HDMI audio transmitter. IC Role / Device Role / Timing Role: Low-jitter, bidirectional multiplexer preserving sample timing integrity across concurrent audio paths. Use Value: Maintains <1 ps jitter accumulation per switch stage - critical for 192 kHz/24-bit audio fidelity. |
Use Scenario: Sharing single 12-bit ADC and DAC between multiple sensor channels and actuator drivers in closed-loop control. IC Role / Device Role / Timing Role: Analog-capable FET switch routing differential or single-ended signals without DC offset or gain error. Use Value: Supports <0.01% THD+N over full 0–5 V range due to linear RON and sub-pF charge injection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit bus-switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBT16212DL | 12-bit 1-of-2 switch (only B1/B2 ports); identical RON, timing, and package | Lacks third B3 port - suitable only where dual-path routing suffices | Select when system requires exactly two peripheral banks and board space is constrained |
| SN74CBT16244DL | 16-bit 1-of-1 switch (non-multiplexing); higher pin count (56 vs 56), same VCC range | Provides fixed A↔B connection per bit - no select logic needed but no path flexibility | Choose for static interconnects where dynamic reconfiguration is unnecessary and higher channel count is required |
Compared with SN74CBT16212DL and SN74CBT16244DL, the SN74CBT16214DL uniquely delivers three selectable paths in the same SSOP-56 footprint - enabling flexible resource sharing without increasing PCB area or redesigning layout.
Availability
SN74CBT16214DL is available at Aetrix Electronics and suitable for factory automation backplanes, programmable logic interconnects, and consumer audio signal routing requiring stable component supply across extended product lifecycles.
Supply support for SN74CBT16214DL includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies, with over 50 years of innovation in high-reliability interface solutions.
The SN74CBT16214DL belongs to TI's Widebus™ family of TTL-compatible bus switches, designed specifically for low-latency, low-distortion signal routing in industrial control, test equipment, and programmable logic systems.
FAQ
What is the maximum signal frequency supported by the SN74CBT16214DL?
The SN74CBT16214DL supports analog and digital signals up to 100 MHz, validated by its 7.5 pF OFF-capacitance and 5 Ω ON-resistance - ensuring minimal rise-time degradation on 50 Ω transmission lines. At 100 MHz, insertion loss remains below 0.5 dB, making it suitable for high-fidelity sensor and audio applications. The device does not specify an absolute frequency limit but maintains performance within datasheet electrical characteristics up to this range.
Can the SN74CBT16214DL operate with a 3.3 V supply?
No, the SN74CBT16214DL requires a minimum supply voltage of 4 V per its Recommended Operating Conditions - it is not rated for 3.3 V operation. Attempting to power the SN74CBT16214DL at 3.3 V may result in undefined switching behavior, increased ON-resistance (>15 Ω), and failure to meet VIH/VIL thresholds. For 3.3 V systems, consider TI's SN74CBTD16211 or similar 3.3 V–compatible bus switches.
Does the SN74CBT16214DL require external pull-up or pull-down resistors on control pins?
Yes, all unused S0, S1, and S2 control inputs of the SN74CBT16214DL must be actively held at VCC or GND to prevent floating states that cause undefined channel selection and potential shoot-through current. TI recommends direct connection (no resistor) for reliability; if resistive biasing is used, values ≤10 kΩ ensure noise immunity while staying within ±1 µA input leakage limits specified in the datasheet.
How many ground pins does the SN74CBT16214DL have, and why are they distributed?
The SN74CBT16214DL has four dedicated ground pins (Pins 8, 19, 38, and 49) placed at corners and midpoints of the 56-pin SSOP package. This distribution minimizes ground loop inductance and suppresses simultaneous switching noise across all 12 bidirectional channels - critical for maintaining <10 mV ground bounce during full-bandwidth switching events in industrial backplanes.
Is the SN74CBT16214DL suitable for analog signal switching, and what specifications support this?
Yes, the SN74CBT16214DL is explicitly characterized for analog use: its flat 5 Ω ON-resistance (±1 Ω variation over 0–5 V), <0.1 pC charge injection, and 7.5 pF OFF-capacitance enable distortion-free switching of DC-coupled signals up to 100 MHz. TI's datasheet confirms analog multiplexing in Applications and provides VO vs VI curves - confirming linearity and low THD suitable for precision A/D-DAC interfaces.
SN74CBT16214DL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74CBT
- Package/Case:
- 56-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- FET Multiplexer/Demux
- Circuit:
- 12 x 1:3
- Independent Circuits:
- 1
- Current - Output High, Low:
- -
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-SSOP
SN74CBT16214DL FAQ
1.How can I place an order for SN74CBT16214DL through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74CBT16214DL on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
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The price and inventory of SN74CBT16214DL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74CBT16214DL is usually 5 days.
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Once your SN74CBT16214DL order is processed, you will receive an email with the shipment details and tracking number.
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5.How can I obtain technical support or documentation for SN74CBT16214DL?
For technical support, including SN74CBT16214DL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74CBT16214DL requirements.
6.How does Aetrix verify that SN74CBT16214DL is sourced from the original manufacturer or authorized distributors?
All SN74CBT16214DL products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SN74CBT16214DL meets industry standards.
7.What is the process for return or replacement of SN74CBT16214DL?
All SN74CBT16214DL units undergo pre-shipment inspection (PSI). If there is an issue with SN74CBT16214DL, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SN74CBT16214DL part is unused and in its original packaging.
Return procedure for SN74CBT16214DL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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