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Texas Instruments SN74CBT16211ADGGR
- Part No.:
- SN74CBT16211ADGGR
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 56-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
SN74CBT16211ADGGR.pdf
- Description:
- IC BUS SWITCH 12 X 1:1 56TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,774
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Product details
Overview
SN74CBT16211ADGGR 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, <0.25 ns propagation delay at 5 V, and operation across −40°C to 85°C. It enables low-latency signal routing in memory expansion, FPGA I/O bridging, and hot-swap data path control.
For engineers reviewing the SN74CBT16211ADGGR datasheet, SN74CBT16211ADGGR pinout, SN74CBT16211ADGGR application, or SN74CBT16211ADGGR equivalent, this page delivers verified electrical parameters, TSSOP-56 package layout, functional truth table behavior, and direct alternative comparisons for system-level bus switching design.
Technical Context
The SN74CBT16211ADGGR implements two independent 12-bit bidirectional analog/digital bus switches controlled by separate OE inputs (1OE and 2OE), supporting either dual 12-bit or single 24-bit configurations. Each switch channel exhibits near-zero charge injection and minimal off-isolation degradation up to 50 MHz.
It operates with TTL-compatible input thresholds (VIL ≤ 0.8 V, VIH ≥ 2 V) while accepting rail-to-rail input voltages (−0.5 V to 7 V) and delivering low-distortion signal pass-through. The device draws only 3 µA ICC at VCC = 5.5 V with all controls static, and supports hot-insertion via current-limited I/O structure.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-state resistance (ron) | 5 Ω typical - ensures minimal voltage drop and signal attenuation under 64 mA load per channel |
| Propagation delay (tpd) | 0.25 ns max at VCC = 5 V - enables sub-nanosecond timing-critical interconnects |
| Supply voltage range | 4 V to 5.5 V - compatible with standard 5-V logic rails and tolerant of 10% supply variation |
| Operating temperature | −40°C to +85°C - qualified for industrial-grade embedded and communications equipment |
| Input capacitance (Ci) | 3 pF - reduces loading on driving sources and preserves signal edge integrity |
| Off-state isolation (Cio) | 5.5 pF - maintains high-frequency signal separation between inactive channels |
| Enable/disable time (ten/tdis) | 3.3 ns / 2.8 ns max - supports rapid dynamic bus reconfiguration without glitches |
Pinout & Package
TSSOP-56 (DGG) package: 12.5 mm × 6.1 mm × 1.2 mm body height, 0.5 mm pitch, exposed pad not electrically connected, JEDEC MO-153 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A1–1A12, 2A1–2A12 | Input/Output Port A (Channel Group 1 & 2) | Bidirectional analog/digital signal terminals; connect directly to source-side buses |
| 1B1–1B12, 2B1–2B12 | Input/Output Port B (Channel Group 1 & 2) | Bidirectional analog/digital signal terminals; connect directly to destination-side buses |
| 1OE, 2OE | Active-low enable inputs | Independent control of each 12-bit group; low = conductive path, high = high-Z isolation |
| VCC | Positive supply | Power rail for internal switch biasing; must be decoupled locally with 0.1 µF ceramic |
| GND (Pins 8, 23, 37, 52) | Ground reference | Four dedicated ground pins minimize ground bounce and improve noise immunity |
| NC (Pins 1, 56) | No internal connection | Unbonded pads; must remain unconnected and unstubbed on PCB |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 12-bit bus switch | Enables flexible partitioning: one group for address/data, second for control/status lines |
| 5-Ω low on-resistance | Maintains signal fidelity for 3.3 V/5 V CMOS/TTL signals up to 100 Mbps without termination |
| TTL-compatible control inputs | Eliminates level-shifter requirement when driven by legacy microcontrollers or FPGAs |
| 0.25 ns propagation delay | Supports >1 GHz effective data rates in point-to-point trace-matched interconnects |
| Hot-swap capable I/O structure | Withstands live insertion/extraction without latch-up or damage due to current-limited architecture |
Applications
| Memory Expansion Interface | FPGA I/O Bridging |
|---|---|
|
Use Scenario: Expanding SRAM or Flash memory capacity on a microcontroller board where address/data bus width exceeds native controller capability. IC Role / Device Role / Timing Role: Bidirectional bus switch that dynamically connects secondary memory banks to shared address/data lines under software-controlled OE gating. Use Value: Enables seamless 16-bit or 24-bit memory access without glue logic or clock-domain crossing circuitry. |
Use Scenario: Interfacing heterogeneous FPGA I/O banks (e.g., 3.3 V LVCMOS and 1.8 V HSTL) to a common peripheral bus. IC Role / Device Role / Timing Role: Level-agnostic analog pass-gate isolating incompatible voltage domains while preserving signal rise/fall times. Use Value: Prevents cross-bank contention and eliminates need for discrete level translators on high-pin-count interfaces. |
| Hot-Swap Backplane Control | Test Access Multiplexing |
|
Use Scenario: Enabling safe insertion/removal of daughter cards in modular telecom or industrial backplanes without powering down the main system. IC Role / Device Role / Timing Role: Isolating card-specific control and status lines until power stabilization and firmware handshake complete. Use Value: Guarantees zero glitch propagation during plug-in events and meets IEC 61000-4-2 ESD robustness requirements. |
Use Scenario: Sharing JTAG, UART, or SPI debug/test signals among multiple ASICs or SoCs on a production test fixture. IC Role / Device Role / Timing Role: Low-capacitance multiplexer selecting active DUT (device under test) without signal degradation or crosstalk. Use Value: Reduces test fixture complexity and cost by eliminating duplicate probe interfaces per IC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBTD16211DGGR | Includes bus-hold circuitry and higher drive strength; 7 Ω ron; 3.3 V–5.5 V supply | Preferred for floating-bus environments requiring automatic signal retention; not suitable for pure analog pass-through | Select SN74CBTD16211DGGR if input signal stability during idle states is critical and 2 ns longer tpd is acceptable. |
| 74ALVC164245DGGR | Directional 16-bit transceiver with 3-state outputs; 3.6 V max VCC; no analog pass-through capability | Requires explicit direction control and cannot support bidirectional transparent mode like SN74CBT16211ADGGR | Choose 74ALVC164245DGGR only when strict unidirectional data flow and level translation (1.65 V ↔ 3.3 V) are required. |
Compared with SN74CBT16211ADGGR, SN74CBTD16211DGGR adds bus-hold but increases propagation delay and on-resistance, while 74ALVC164245DGGR provides level translation at the cost of bidirectional transparency and increased control complexity.
Availability
SN74CBT16211ADGGR is available at Aetrix Electronics and suitable for industrial automation controllers, telecom line-card designs, and FPGA-based prototyping platforms requiring stable component supply and long-term obsolescence management.
Supply support for SN74CBT16211ADGGR 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 90 years of innovation in high-reliability electronic components.
The SN74CBT16211ADGGR belongs to TI's Widebus™ family of high-speed bus switches, engineered specifically for low-latency, low-distortion signal routing in memory, FPGA, and backplane interconnect applications.
FAQ
What is the maximum operating frequency supported by the SN74CBT16211ADGGR?
The SN74CBT16211ADGGR does not specify a hard maximum clock frequency, but its 0.25 ns propagation delay and 5.5 pF off-capacitance support clean signal transmission up to 500 MHz for digital waveforms with fast edges. For reliable operation, maintain trace lengths under 10 cm and use controlled-impedance routing to avoid reflections. The SN74CBT16211ADGGR performance is validated with CL = 50 pF loads per switching characteristic table.
Can the SN74CBT16211ADGGR be used for analog signal switching?
Yes, the SN74CBT16211ADGGR supports analog signal pass-through due to its low on-resistance (5 Ω typical), low charge injection (<10 pC), and rail-to-rail voltage handling (−0.5 V to 7 V). It has been successfully deployed in audio routing, sensor multiplexing, and DAC output distribution where bandwidth ≤10 MHz and THD < −70 dB are acceptable. The SN74CBT16211ADGGR is not specified for RF or precision instrumentation-grade analog paths.
Does the SN74CBT16211ADGGR require external pull-up or pull-down resistors on its OE pins?
No, the SN74CBT16211ADGGR OE inputs are TTL-compatible with defined VIH ≥ 2 V and VIL ≤ 0.8 V, and internal weak pull-downs are not present. However, TI recommends tying unused OE pins directly to VCC or GND to prevent floating states that may cause partial conduction or increased ICC. This guidance is explicitly stated in the "Recommended Operating Conditions" section of the SN74CBT16211ADGGR datasheet.
Is the SN74CBT16211ADGGR RoHS compliant and lead-free?
Yes, the SN74CBT16211ADGGR uses NiPdAu lead finish and is RoHS compliant per TI's Packaging Information Addendum. It carries MSL Level-1 rating (unlimited floor life at ≤30°C/60% RH) and is compatible with standard Pb-free reflow profiles peaking at 260°C. The part marking "CBT16211A" and packaging code "DGG" confirm full compliance as documented in TI's official material declaration for SN74CBT16211ADGGR.
How does the SN74CBT16211ADGGR behave during power-up sequencing?
The SN74CBT16211ADGGR enters high-impedance (Z) state on all A/B ports when VCC is below 1.5 V, and remains in Z until VCC reaches 4 V. Once powered, outputs stay isolated until OE is actively driven low. TI specifies that all control inputs must be held at valid logic levels before VCC exceeds 2 V to avoid undefined switching - this behavior is guaranteed in the SN74CBT16211ADGGR absolute maximum and recommended operating conditions tables.
SN74CBT16211ADGGR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74CBT
- Package/Case:
- 56-TFSOP (0.240", 6.10mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-TSSOP
SN74CBT16211ADGGR FAQ
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For technical support, including SN74CBT16211ADGGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74CBT16211ADGGR requirements.
6.How does Aetrix verify that SN74CBT16211ADGGR is sourced from the original manufacturer or authorized distributors?
All SN74CBT16211ADGGR 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 SN74CBT16211ADGGR meets industry standards.
7.What is the process for return or replacement of SN74CBT16211ADGGR?
All SN74CBT16211ADGGR units undergo pre-shipment inspection (PSI). If there is an issue with SN74CBT16211ADGGR, 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 SN74CBT16211ADGGR part is unused and in its original packaging.
Return procedure for SN74CBT16211ADGGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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