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Texas Instruments SN74CBT16211ADGVR
- Part No.:
- SN74CBT16211ADGVR
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 56-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74CBT16211ADGVR.pdf
- Description:
- IC BUS SWITCH 12 X 1:1 56TVSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,420
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Product details
Overview
SN74CBT16211ADGVR from Texas Instruments is a 24-bit high-speed TTL-compatible bus switch IC with dual 12-bit configurable operation, 5-Ω typical on-state resistance, <0.35 ns propagation delay at 4 V, and operation over −40°C to 85°C. It enables low-latency signal routing in memory expansion, FPGA I/O bridging, and hot-swap backplane interfaces.
For engineers reviewing the SN74CBT16211ADGVR datasheet, SN74CBT16211ADGVR pinout, SN74CBT16211ADGVR application, or SN74CBT16211ADGVR equivalent, key selection criteria include its 56-pin TVSOP (DGV) package, bidirectional 24-bit switching capability, TTL-level control compatibility, and thermal performance (θJA = 48°C/W).
Technical Context
The SN74CBT16211ADGVR implements two independent 12-bit analog bus switches controlled by separate OE inputs (1OE and 2OE), supporting either dual 12-bit or single 24-bit configurations. Each switch channel exhibits symmetrical bidirectional conduction with no directionality constraint.
Its TTL-compatible control inputs accept VIH ≥ 2 V and VIL ≤ 0.8 V, enabling direct interfacing with legacy logic families without level translation. The device operates from 4 V to 5.5 V supply and maintains low dynamic power consumption (ICC ≤ 3 µA, ∆ICC ≤ 2.5 mA per active control input).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-state resistance (ron) | 5 Ω typical - ensures minimal voltage drop and signal attenuation across switched paths at 64 mA load. |
| Propagation delay (tpd) | 0.35 ns at VCC = 4 V - enables sub-nanosecond signal routing for high-speed parallel buses. |
| Supply voltage range | 4 V to 5.5 V - compatible with standard 5-V TTL and mixed-voltage system rails. |
| Operating temperature | −40°C to +85°C - supports industrial-grade deployment in embedded and communications equipment. |
| Input capacitance (Ci) | 3 pF - minimizes loading on driving logic and preserves signal edge integrity. |
| Off-state isolation (Cio) | 5.5 pF - limits capacitive crosstalk between enabled and disabled channels. |
| Channel current rating | 128 mA continuous - sustains robust operation under sustained bus loading conditions. |
Pinout & Package
SN74CBT16211ADGVR uses a 56-pin Thin Very Small Outline Package (TVSOP, DGV), 11.4 mm × 6.2 mm footprint, 1.2 mm max height, JEDEC MO-194 compliant, with exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A1–1A12, 2A1–2A12 | Input/Output Port A | First and second 12-bit bidirectional data terminals; connect directly to source-side buses. |
| 1B1–1B12, 2B1–2B12 | Input/Output Port B | Corresponding 12-bit bidirectional data terminals; connect to destination-side buses or peripherals. |
| 1OE, 2OE | Enable Inputs | Active-low controls: asserting 1OE connects 1A↔1B; asserting 2OE connects 2A↔2B. |
| VCC | Power Supply | Single 4–5.5 V supply powering all switch channels and control logic. |
| GND (Pins 8, 23, 37, 52) | Ground | Four dedicated ground pins reduce ground bounce and improve noise immunity in high-speed switching. |
| NC (Pins 1, 56) | No Connect | Unbonded pins; must remain unconnected on PCB to avoid parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional analog switching | Enables transparent, polarity-agnostic signal routing without direction control logic overhead. |
| TTL-compatible control inputs | Eliminates need for external level shifters when interfacing with 5-V microcontrollers or FPGAs. |
| Low on-resistance (5 Ω typ) | Reduces insertion loss and maintains signal integrity for wideband digital signals up to 200 MHz. |
| Sub-nanosecond propagation delay | Preserves timing margins in high-speed parallel interfaces such as SRAM, Flash, or peripheral expansion buses. |
| Independent dual-channel enable | Allows selective activation of 12-bit segments-critical for power-gated subsystems and partial reconfiguration. |
Applications
| Memory Expansion Interface | FPGA I/O Bridging |
|---|---|
Use Scenario: Expanding external SRAM or NOR Flash capacity on a microcontroller-based board with limited native address/data lines. IC Role / Device Role / Timing Role: Bidirectional 24-bit bus switch isolating and extending memory data/address bus between MCU and external memory devices. Use Value: Enables seamless 24-bit data path extension with <0.35 ns added delay and no direction-control logic required. | Use Scenario: Interfacing heterogeneous I/O standards (e.g., 3.3-V FPGA bank to 5-V legacy peripheral) while maintaining signal fidelity. IC Role / Device Role / Timing Role: Level-agnostic analog pass gate providing galvanic continuity between mismatched voltage domains. Use Value: Eliminates need for discrete level translators; preserves rise/fall times due to 5-Ω ron and 3-pF Ci. |
| Hot-Swap Backplane Slot | Test Access Multiplexer |
Use Scenario: Enabling safe insertion/removal of line cards in telecom or industrial backplanes without disrupting active data lanes. IC Role / Device Role / Timing Role: Isolation switch placed inline on critical control or status lines to decouple card during insertion. Use Value: Prevents bus contention and glitch propagation via fast disable (<8 ns tdis) and high off-isolation (>30 dB at 100 MHz). | Use Scenario: Routing JTAG, boundary-scan, or debug signals among multiple ASICs or SoCs on a shared test bus. IC Role / Device Role / Timing Role: Low-capacitance multiplexer selecting one of several device TDI/TDO paths onto a common test controller interface. Use Value: Minimizes test signal degradation with 5.5 pF off-state capacitance and <0.35 ns skew across all 24 paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBTD16211DGVR | Includes power-down (IOFF) protection; higher ICC (10 µA); same pinout and ron. | Required where live-insertion or partial-power-down states must prevent leakage current into powered-off sections. | Select SN74CBTD16211DGVR only if IOFF isolation (<1 µA) is mandatory for system-level power sequencing. |
| SN74LVC16244ADGVR | 3-state buffer (not analog switch); 24 mA drive; 3.3-V only; higher propagation delay (~5 ns). | Suitable for unidirectional, voltage-translated buffering-not for bidirectional, low-latency, or analog-pass applications. | Choose SN74LVC16244ADGVR only when direction-controlled buffering is acceptable and 3.3-V operation is required. |
Compared with SN74CBT16211ADGVR, SN74CBTD16211DGVR adds IOFF protection but increases quiescent current, while SN74LVC16244ADGVR trades bidirectionality and speed for voltage translation and 3.3-V compatibility-making SN74CBT16211ADGVR optimal for low-latency, 5-V, bidirectional bus extension.
Availability
SN74CBT16211ADGVR is available at Aetrix Electronics and suitable for memory expansion, FPGA I/O bridging, hot-swap backplane slots, and test access multiplexing requiring stable component supply and long-term industrial availability.
Supply support for SN74CBT16211ADGVR 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 solutions, with decades of expertise in high-speed logic and interface ICs.
The SN74CBT16211ADGVR belongs to TI's Widebus™ family of high-speed bus switches, designed specifically for low-latency, bidirectional signal routing in 5-V systems where timing integrity and minimal loading are critical.
FAQ
What is the maximum operating voltage for the SN74CBT16211ADGVR?
The SN74CBT16211ADGVR supports a supply voltage range of 4 V to 5.5 V. Absolute maximum ratings specify VCC up to 7 V, but functional operation is guaranteed only within the recommended 4–5.5 V range. Exceeding 5.5 V may cause unreliable switching behavior or accelerated wear.
Does the SN74CBT16211ADGVR support hot-plug operation?
Yes, the SN74CBT16211ADGVR supports hot-plug use cases due to its break-before-make switching behavior, fast disable time (tdis ≤ 7.9 ns), and high off-state isolation (5.5 pF Cio). When 1OE or 2OE is deasserted, the corresponding 12-bit path disconnects cleanly-preventing bus contention during live insertion or removal of peripheral modules.
Can the SN74CBT16211ADGVR be used with 3.3-V logic levels?
No-the SN74CBT16211ADGVR requires a 4–5.5 V VCC supply and is specified for TTL-compatible input thresholds (VIH ≥ 2 V, VIL ≤ 0.8 V). While 3.3-V signals may meet input voltage thresholds, output swing will be limited to ~3.3 V under 3.3-V VCC, which violates the device's minimum 4-V supply requirement. Use SN74LVC16244ADGVR for native 3.3-V operation.
How many ground pins does the SN74CBT16211ADGVR have in its TVSOP package?
The SN74CBT16211ADGVR in the 56-pin TVSOP (DGV) package has four dedicated ground pins: Pin 8, Pin 23, Pin 37, and Pin 52. This multi-ground configuration reduces ground impedance, suppresses simultaneous switching noise, and improves signal integrity in high-speed 24-bit bus applications.
Is the SN74CBT16211ADGVR pin-compatible with other members of the CBT16211 family?
Yes-SN74CBT16211ADGVR shares identical pinout and functionality with SN74CBT16211ADL, SN74CBT16211ADLR, and SN74CBT16211ADGGR. All variants use the same 56-pin layout across DL (SSOP), DGG (TSSOP), and DGV (TVSOP) packages. Mechanical dimensions differ, but PCB land patterns are interchangeable with minor footprint adjustments for package body size.
SN74CBT16211ADGVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74CBT
- Package/Case:
- 56-TFSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Bus Switch
- Circuit:
- 12 x 1:1
- Independent Circuits:
- 2
- 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-TVSOP
SN74CBT16211ADGVR FAQ
1.How can I place an order for SN74CBT16211ADGVR through Aetrix?
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6.How does Aetrix verify that SN74CBT16211ADGVR is sourced from the original manufacturer or authorized distributors?
All SN74CBT16211ADGVR 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 SN74CBT16211ADGVR meets industry standards.
7.What is the process for return or replacement of SN74CBT16211ADGVR?
All SN74CBT16211ADGVR units undergo pre-shipment inspection (PSI). If there is an issue with SN74CBT16211ADGVR, 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 SN74CBT16211ADGVR part is unused and in its original packaging.
Return procedure for SN74CBT16211ADGVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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