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Texas Instruments 74CBT16209ADGGRG4
- Part No.:
- 74CBT16209ADGGRG4
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
74CBT16209ADGGRG4.pdf
- Description:
- IC BUS FET EXCH SW 9X2:2 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,087
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Product details
Overview
74CBT16209ADGGRG4 from Texas Instruments is an 18-bit TTL-compatible bus switch with configurable 9-bit bus exchange functionality, 5-Ω typical on-state resistance, 0.25 ns propagation delay at 5 V, and operation over −40°C to 85°C. It routes bidirectional data between four signal ports (A1/B1 through A9/B9) using S0–S2 select inputs and is used in high-speed memory and peripheral interconnects.
For engineers reviewing the 74CBT16209ADGGRG4 datasheet, 74CBT16209ADGGRG4 pinout, 74CBT16209ADGGRG4 application, or 74CBT16209ADGGRG4 equivalent, key selection criteria include on-resistance matching across channels, enable/disable timing consistency, control-input voltage compatibility with legacy TTL logic, and thermal performance in TSSOP-48 packages under sustained 128 mA channel loading.
Technical Context
The 74CBT16209ADGGRG4 implements a dual-rail CMOS transmission-gate architecture with independent A/B port pairs per channel and three-level binary decoding of S0–S2 to configure routing modes-including disconnect, single-port pass-through, and full 9-bit crossbar exchange. All switches share a common VCC and GND reference with no internal level-shifting.
It operates strictly within 4 V to 5.5 V supply range, requires all unused control inputs tied to VCC or GND, and exhibits input capacitance of 4 pF and off-state I/O capacitance of 7.5 pF-critical for maintaining signal integrity in 50-pF load environments typical of backplane and motherboard trace routing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-state resistance (ron) | 4 Ω to 8 Ω at 30 mA - ensures minimal voltage drop and skew across all 18 channels during high-speed switching. |
| Propagation delay (tpd) | 0.25 ns at VCC = 5 V - enables sub-nanosecond timing alignment in synchronous bus architectures. |
| Supply voltage range | 4 V to 5.5 V - compatible with 5-V TTL and mixed-voltage system rails without level translators. |
| Operating temperature | −40°C to +85°C - qualified for industrial-grade embedded control and communications equipment. |
| Channel current rating | 128 mA continuous - supports robust drive capability for terminated parallel buses and FPGA I/O interfaces. |
| Input capacitance (Ci) | 4 pF - reduces capacitive loading on upstream drivers and preserves edge rate in high-frequency data paths. |
| Off-state I/O capacitance | 7.5 pF - minimizes crosstalk and ghost signals when ports are disconnected or isolated. |
Pinout & Package
TSSOP-48 package (DGG), 12.5 mm × 6.1 mm body, 0.5 mm pitch, exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| S0, S1, S2 | Binary select inputs | Determine routing mode (disconnect, A→B, B→A, or cross-exchange) for all 9 channel pairs simultaneously. |
| A1–A9, B1–B9 (each as A1/A2, B1/B2, etc.) | Bidirectional signal terminals | Each pair forms one independent switch channel; A1/A2 and B1/B2 are electrically isolated unless selected. |
| VCC | Positive supply | Single 4–5.5 V rail powers all 18 switches and control logic; no separate I/O supply required. |
| GND (pins 4, 10, 16, 22, 28, 34, 40, 46) | Ground reference | Eight dedicated ground pins minimize ground bounce and ensure stable switching thresholds across all channels. |
Key Features
| Feature | Design Value |
|---|---|
| 5-Ω typical on-resistance | Enables <10 mV voltage drop at 20 mA per channel, preserving signal amplitude in 5-V logic systems. |
| TTL-compatible input thresholds | VIH = 2 V min / VIL = 0.8 V max allows direct interfacing with legacy 5-V microcontrollers and ASICs. |
| Configurable 9-bit bus exchange | Supports A↔B data swapping via S0–S2 without external logic, reducing PCB area and routing complexity. |
| Low 4 pF input capacitance | Maintains >100 MHz signal bandwidth with minimal driver loading, critical for DDR and parallel flash interfaces. |
| 0.25 ns propagation delay | Meets tight setup/hold timing budgets in 200+ MHz synchronous bus designs with 50-pF loads. |
Applications
| Memory Interconnect | FPGA I/O Expansion |
|---|---|
|
Use Scenario: Routing address/data between dual-port SRAM and microcontroller in real-time control systems. IC Role / Device Role / Timing Role: Bidirectional bus switch enabling time-multiplexed access to shared memory banks with sub-nanosecond channel switching. Use Value: Eliminates need for discrete transceivers and direction-control logic while maintaining 5-V TTL signal integrity across 18 lines. |
Use Scenario: Expanding limited FPGA I/O count to drive multiple peripheral modules (ADC, DAC, UART) on a single board. IC Role / Device Role / Timing Role: Configurable 9-bit exchange hub that reassigns I/O assignments dynamically via S0–S2 control lines. Use Value: Reduces FPGA pin utilization by 50% and avoids custom PCB layer stacking for I/O fanout. |
| Legacy Peripheral Bridging | Test Access Multiplexing |
|
Use Scenario: Interfacing ISA-bus peripherals to modern ARM-based controllers in industrial retrofit applications. IC Role / Device Role / Timing Role: Level-consistent bus switch translating between 5-V ISA signaling and controller-side 5-V GPIOs. Use Value: Preserves original timing margins without adding propagation delay or signal inversion artifacts. |
Use Scenario: Sharing JTAG and boundary-scan test access across multiple ASICs on a dense backplane. IC Role / Device Role / Timing Role: Low-capacitance, low-resistance multiplexer enabling clean test signal routing with minimal skew. Use Value: Supports IEEE 1149.1 compliance with <1 ps inter-channel skew and <7.5 pF off-state loading. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBTD16210DGGR | Includes output-enable (OE) pin per 9-bit section and higher 10-Ω ron; supports independent section disable. | Preferred where partial bus isolation is required without affecting other channels. | Select when granular per-section control is needed beyond global S0–S2 routing. |
| 74LVC162245DGGR | Bidirectional transceiver with direction control (DIR), 3.3-V only, ±24 mA drive, no exchange mode. | Used in 3.3-V-only systems requiring level translation and direction management-not bus exchange. | Choose only for 3.3-V domains with explicit DIR-driven data flow; not functionally substitutable for exchange logic. |
Compared with SN74CBTD16210DGGR and 74LVC162245DGGR, the 74CBT16209ADGGRG4 uniquely delivers 9-bit crossbar exchange in a single 5-V device with lowest on-resistance and fastest propagation-making it optimal for compact, high-fidelity 5-V bus routing where dynamic topology reconfiguration is essential.
Availability
74CBT16209ADGGRG4 is available at Aetrix Electronics and suitable for industrial control systems, FPGA-based prototyping platforms, and legacy peripheral interface designs requiring stable component supply and long-term manufacturability.
Supply support for 74CBT16209ADGGRG4 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 U.S.-based semiconductor company specializing in analog, embedded processing, and logic solutions with broad industrial and automotive qualification coverage.
The CBT (Crosspoint Bus Transceiver) family, including the 74CBT16209ADGGRG4, was engineered for high-speed, low-skew 5-V bus switching in memory subsystems, test equipment, and programmable logic interconnects.
FAQ
What is the maximum continuous current per channel for the 74CBT16209ADGGRG4?
The 74CBT16209ADGGRG4 supports up to 128 mA continuous channel current per switch path, verified under recommended operating conditions with VCC = 4–5.5 V and TA = −40°C to 85°C. This rating applies uniformly across all 18 channels and is specified in the Absolute Maximum Ratings table of the SCDS006O datasheet.
Does the 74CBT16209ADGGRG4 require external pull-up or pull-down resistors on S0–S2 control inputs?
No-unused S0, S1, or S2 inputs on the 74CBT16209ADGGRG4 must be actively tied to either VCC or GND to prevent floating states that could cause undefined routing behavior. External resistors are acceptable only if they guarantee solid logic levels; direct connection is preferred per TI Application Report SCBA004.
Can the 74CBT16209ADGGRG4 operate reliably at 3.3 V?
No-the 74CBT16209ADGGRG4 is not characterized or guaranteed for operation below 4 V. Its TTL-compatible input thresholds (VIH ≥ 2 V, VIL ≤ 0.8 V) and on-resistance specs are validated only from 4 V to 5.5 V. For 3.3-V systems, consider the 74LVC162245DGGR or similar LVC-family devices instead of the 74CBT16209ADGGRG4.
How many distinct routing configurations does the 74CBT16209ADGGRG4 support via S0–S2?
The 74CBT16209ADGGRG4 supports eight distinct routing modes defined by the 3-bit S0–S2 combination, as shown in the Function Table of SCDS006O. These include full disconnect, four single-port pass-through modes, and two full 9-bit exchange modes (A↔B straight and A↔B crossed).
Is thermal derating required for the 74CBT16209ADGGRG4 in a 4-layer PCB with standard copper pour?
Yes-given its θJA of 70°C/W in the TSSOP-48 (DGG) package, the 74CBT16209ADGGRG4 requires thermal derating above 65°C ambient when fully loaded. With 18 channels conducting 64 mA each, power dissipation exceeds 100 mW; use internal copper planes and thermal vias under the exposed pad region to maintain junction temperature within limits.
74CBT16209ADGGRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74CBT
- Package/Case:
- 48-TFSOP (0.240", 6.10mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Bus FET Exchange Switch
- Circuit:
- 9 x 2:2
- Independent Circuits:
- 1
- Current - Output High, Low:
- -
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 4V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSSOP
74CBT16209ADGGRG4 FAQ
1.How can I place an order for 74CBT16209ADGGRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74CBT16209ADGGRG4 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 74CBT16209ADGGRG4 reliable?
The price and inventory of 74CBT16209ADGGRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74CBT16209ADGGRG4 is usually 5 days.
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Once your 74CBT16209ADGGRG4 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 74CBT16209ADGGRG4?
For technical support, including 74CBT16209ADGGRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74CBT16209ADGGRG4 requirements.
6.How does Aetrix verify that 74CBT16209ADGGRG4 is sourced from the original manufacturer or authorized distributors?
All 74CBT16209ADGGRG4 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 74CBT16209ADGGRG4 meets industry standards.
7.What is the process for return or replacement of 74CBT16209ADGGRG4?
All 74CBT16209ADGGRG4 units undergo pre-shipment inspection (PSI). If there is an issue with 74CBT16209ADGGRG4, 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 74CBT16209ADGGRG4 part is unused and in its original packaging.
Return procedure for 74CBT16209ADGGRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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