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Texas Instruments SN74CBTLV16212VR
- Part No.:
- SN74CBTLV16212VR
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 56-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74CBTLV16212VR.pdf
- Description:
- IC BUS FET EXC SW 12X2:2 56TVSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,234
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Product details
Overview
SN74CBTLV16212VR from Texas Instruments is a 24-bit, high-speed, low-on-resistance bus switch with break-before-make switching logic, rail-to-rail data I/O capability, and Ioff partial-power-down support. It operates as either a 24-bit bus switch or 12-bit bus exchanger across four signal ports (A1/B1–A12/B12), enabling dynamic data path routing in memory expansion, test access, and FPGA interconnect applications.
For engineers reviewing the SN74CBTLV16212VR datasheet, SN74CBTLV16212VR pinout, SN74CBTLV16212VR application, or SN74CBTLV16212VR equivalent, key selection criteria include its 5–8 Ω typical on-state resistance at 2.5 V/3.3 V, sub-0.25 ns propagation delay, 24-bit bidirectional channel count, and TVSOP-56 package compatibility with high-density PCB layouts.
Technical Context
The SN74CBTLV16212VR implements 24 independent FET-based analog switches controlled by three select inputs (S0–S2), supporting eight configurable routing modes including disconnect, A↔B port mirroring, and crossbar exchange. Its CMOS-compatible control interface accepts 1.7–2.0 V high-level inputs over 2.3–3.6 V VCC, ensuring interoperability with LVTTL and low-voltage logic families.
Each switch features rail-to-rail conduction, 128 mA continuous channel current rating, and Ioff-enabled isolation during power-down-preventing backflow current when VCC = 0 V and any I/O is biased between 0–3.6 V. The device meets JESD 78 Class II latch-up immunity (>100 mA) and exceeds JESD 22 ESD ratings (2000-V HBM, 200-V MM).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-state resistance (ron) | 5–8 Ω typical at VCC = 2.5 V/3.3 V - enables minimal voltage drop and <0.25 ns propagation delay in high-speed data paths |
| Propagation delay (tpd) | 0.15–0.25 ns - supports >4 GHz effective switching bandwidth for DDR memory and FPGA I/O routing |
| VCC operating range | 2.3 V to 3.6 V - compatible with 2.5 V and 3.3 V system rails without level-shifting circuitry |
| Ioff leakage | ≤10 µA at VCC = 0 V - guarantees safe partial-power-down operation and prevents backfeed in mixed-power-domain systems |
| ESD protection | 2000-V HBM, 200-V MM - eliminates need for external transient suppression in board-level ESD zones |
| Switching architecture | Break-before-make - ensures no through-current during state transitions, preventing bus contention and supply glitches |
| Channel count | 24 bidirectional channels - provides full 24-bit parallel bus switching or 12-bit dual-port exchange functionality |
Pinout & Package
SN74CBTLV16212VR uses a 56-pin TVSOP (DGV) package, 11.4 mm × 4.5 mm footprint, 1.2 mm max height, JEDEC MO-194 compliant, with exposed pad for thermal enhancement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A1–12A1, 1A2–12A2 | Port A input/output terminals | 24 bidirectional data lines grouped as 12 pairs; each pair connects to corresponding B-side port under S0–S2 control |
| 1B1–12B1, 1B2–12B2 | Port B input/output terminals | 24 bidirectional data lines forming second set of switch endpoints; routing determined by function table |
| S0, S1, S2 | Data-select control inputs | 3-bit binary address determining switch configuration (e.g., A1↔B1, A1↔B2, A1↔B1 + A2↔B2, etc.) |
| VCC | Power supply | 2.3–3.6 V supply for internal logic and switch bias; powers all 24 channels simultaneously |
| GND (Pins 8, 17, 35, 44) | Ground reference | Four dedicated ground pins minimize ground bounce and ensure stable switching thresholds across full 24-bit width |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail analog switching | Supports full-swing signals from GND to VCC without distortion-enables transparent routing of unbuffered digital or analog control signals |
| Break-before-make switching | Guarantees zero overlap between old and new connection states-eliminates short-circuit risk during hot-swap or reconfiguration events |
| Ioff partial-power-down protection | Blocks current flow when VCC = 0 V while maintaining I/O bias up to 3.6 V-critical for PCIe hot-plug, modular backplanes, and battery-backed subsystems |
| Low on-state capacitance | 8 pF typical Cio(OFF) - preserves signal integrity and minimizes loading on high-frequency buses (e.g., DDR2/3 address/control lines) |
| Widebus™ family compatibility | Pin- and function-compatible with SN74CBTLV16210/16211 - allows scalable design reuse across 12-, 24-, and 48-bit bus switch configurations |
Applications
| Memory Expansion Interface | FPGA I/O Multiplexing |
|---|---|
|
Use Scenario: Expanding DRAM capacity in embedded controllers by dynamically connecting multiple memory banks to a single memory controller. IC Role / Device Role / Timing Role: SN74CBTLV16212VR acts as a 24-bit bidirectional bus switch, enabling time-multiplexed access to two 24-bit memory modules via S0–S2 control. Use Value: Eliminates need for dual-memory controllers; maintains sub-0.25 ns timing margin for DDR2-800 operation without added latency. |
Use Scenario: Sharing limited FPGA I/O pins among multiple peripheral interfaces (e.g., UART, SPI, I²C) using time-division multiplexing. IC Role / Device Role / Timing Role: SN74CBTLV16212VR serves as a programmable I/O router, switching 24 FPGA pins between three peripheral sets under FPGA GPIO control. Use Value: Reduces FPGA pin count requirement by 40%; preserves signal integrity with 5–8 Ω ron and rail-to-rail swing. |
| Boundary-Scan Test Access | High-Speed Logic Analyzer Probe Multiplexer |
|
Use Scenario: Inserting IEEE 1149.1 boundary-scan test points into dense PCB traces without adding stubs or impedance discontinuities. IC Role / Device Role / Timing Role: SN74CBTLV16212VR functions as a non-invasive, low-capacitance (8 pF) bus tap-connecting test equipment only during scan cycles. Use Value: Avoids signal degradation on 200+ MHz JTAG/SWD traces; Ioff isolation prevents interference during normal operation. |
Use Scenario: Routing 24-channel logic analyzer inputs to one of four DUT signal groups using automated test software. IC Role / Device Role / Timing Role: SN74CBTLV16212VR operates as a 24-bit analog multiplexer with break-before-make action, preventing probe shorting during channel switching. Use Value: Enables glitch-free probing of high-speed digital waveforms up to 4 GHz equivalent bandwidth; 128 mA channel rating supports active probe drive. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBTLV16212GR | TSSOP-56 (DGG) package; θJA = 64°C/W vs. 48°C/W for SN74CBTLV16212VR | Same electrical specs but larger footprint (14.1 mm × 6.2 mm vs. 11.4 mm × 4.5 mm); less suitable for ultra-dense layouts | Select SN74CBTLV16212GR if TSSOP handling infrastructure exists; prefer SN74CBTLV16212VR for space-constrained designs requiring TVSOP density |
| SN74CBTLV16210DL | 12-bit version (28-pin SSOP); no S2 input; fixed A↔B or A↔A/B↔B routing only | Lacks 3-bit select flexibility and 24-bit width-requires two devices for equivalent channel count, increasing layout area and power | Choose SN74CBTLV16210DL only for cost-sensitive, lower-channel-count applications where S0/S1-only control suffices |
Compared with SN74CBTLV16212GR and SN74CBTLV16210DL, the SN74CBTLV16212VR delivers optimal trade-off of 24-bit channel density, TVSOP footprint efficiency, and full 3-bit routing flexibility-making it the preferred choice for next-generation compact, high-speed interconnect designs.
Availability
SN74CBTLV16212VR is available at Aetrix Electronics and suitable for memory expansion interfaces, FPGA I/O multiplexing, boundary-scan test access, and high-speed logic analyzer probe multiplexing requiring stable component supply and long-term industrial availability.
Supply support for SN74CBTLV16212VR 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, high-performance ICs.
The SN74CBTLV16212VR belongs to TI's Widebus™ family of high-speed bus switches, engineered specifically for low-latency, low-distortion signal routing in memory subsystems, test equipment, and reconfigurable digital interfaces.
FAQ
What is the maximum operating frequency supported by the SN74CBTLV16212VR?
The SN74CBTLV16212VR does not specify a clock frequency but supports signal routing with 0.15–0.25 ns propagation delay and 5–8 Ω on-state resistance. This enables reliable operation with data rates exceeding 4 Gbps in point-to-point links and compatibility with DDR2-800 and DDR3-1066 memory timing budgets when used in bus-switching configurations.
Does the SN74CBTLV16212VR require external pull-up or pull-down resistors on its S0–S2 control inputs?
No. The SN74CBTLV16212VR specifies VIH = 1.7 V (at VCC = 2.3–2.7 V) and VIL = 0.7 V (same condition), allowing direct connection to 2.5 V or 3.3 V logic outputs. TI recommends tying unused control inputs to VCC or GND per SCBA004 to prevent floating nodes and unintended switching.
Can the SN74CBTLV16212VR be used in analog signal routing applications?
Yes. The SN74CBTLV16212VR supports rail-to-rail analog switching with flat on-resistance (5–8 Ω) and low off-capacitance (8 pF), making it suitable for routing low-frequency analog control signals (e.g., DAC references, sensor bias lines) and low-slew-rate digital signals up to ~500 MHz. It is not rated for RF or high-fidelity audio.
What is the thermal performance of the SN74CBTLV16212VR in its TVSOP package?
The SN74CBTLV16212VR in TVSOP (DGV) package has a junction-to-ambient thermal resistance (θJA) of 48°C/W. At 128 mA per channel and worst-case 8 Ω ron, power dissipation remains below 100 mW total-keeping junction temperature rise under 5°C above ambient in standard 2-layer PCB layouts with moderate copper pour.
How does the break-before-make feature of the SN74CBTLV16212VR prevent bus contention?
The SN74CBTLV16212VR guarantees that all existing switch connections are fully opened before any new connection is closed during S0–S2 state changes. This eliminates momentary short-circuits between driven and undriven bus segments, preventing current surges, supply droop, and logic corruption-especially critical in hot-swap and reconfiguration scenarios.
SN74CBTLV16212VR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74CBTLV
- Package/Case:
- 56-TFSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Bus FET Exchange Switch
- Circuit:
- 12 x 2:2
- Independent Circuits:
- 1
- Current - Output High, Low:
- -
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 2.3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-TVSOP
SN74CBTLV16212VR FAQ
1.How can I place an order for SN74CBTLV16212VR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74CBTLV16212VR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SN74CBTLV16212VR reliable?
The price and inventory of SN74CBTLV16212VR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74CBTLV16212VR is usually 5 days.
3.What payment methods are accepted for SN74CBTLV16212VR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74CBTLV16212VR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74CBTLV16212VR?
SN74CBTLV16212VR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74CBTLV16212VR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SN74CBTLV16212VR?
For technical support, including SN74CBTLV16212VR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74CBTLV16212VR requirements.
6.How does Aetrix verify that SN74CBTLV16212VR is sourced from the original manufacturer or authorized distributors?
All SN74CBTLV16212VR 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 SN74CBTLV16212VR meets industry standards.
7.What is the process for return or replacement of SN74CBTLV16212VR?
All SN74CBTLV16212VR units undergo pre-shipment inspection (PSI). If there is an issue with SN74CBTLV16212VR, 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 SN74CBTLV16212VR part is unused and in its original packaging.
Return procedure for SN74CBTLV16212VR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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