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Texas Instruments 74CBTLV3245ADWG4
- Part No.:
- 74CBTLV3245ADWG4
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74CBTLV3245ADWG4.pdf
- Description:
- IC BUS SWITCH 8 X 1:1 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,348
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Product details
Overview
74CBTLV3245ADWG4 from Texas Instruments is a low-voltage octal FET bus switch in 20-pin TSSOP (PW) package, providing bidirectional 8-bit signal routing with 5 Ω on-state resistance, rail-to-rail switching, and Ioff partial-power-down support. It operates from 2.3 V to 3.6 V and is used in datacenter interconnects, wired networking backplanes, and industrial motor drive control interfaces.
For engineers reviewing the 74CBTLV3245ADWG4 datasheet, 74CBTLV3245ADWG4 pinout, 74CBTLV3245ADWG4 application, or 74CBTLV3245ADWG4 equivalent, this device delivers sub-0.25 ns propagation delay, ±2000 V HBM ESD protection, and high-impedance isolation during power sequencing-critical for hot-swap-capable systems and mixed-voltage domain bridging.
Technical Context
The 74CBTLV3245ADWG4 implements eight independent analog switches controlled by a single active-low Output Enable (OE) input. When OE is low, A1–A8 are electrically connected to B1–B8 with minimal insertion loss; when OE is high, both ports enter high-impedance state with <9 pF off-capacitance.
Its FET-based architecture enables rail-to-rail signal pass-through without level translation, while the Ioff feature limits reverse current to ≤40 µA when VCC = 0 V, ensuring safe operation during partial power-down in multi-rail systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-state resistance (ron) | 5 Ω typical at VCC = 3.3 V, enabling low-loss signal coupling with <10 mV drop at 64 mA per channel |
| Propagation delay (tpd) | 0.15–0.25 ns at VCC = 2.5 V or 3.3 V, supporting >4 Gbps serial link switching without timing skew |
| Supply voltage range | 2.3 V to 3.6 V - compatible with 2.5 V and 3.3 V logic domains without external level shifters |
| Ioff current | ≤40 µA at VCC = 0 V - prevents backflow damage during power sequencing in hot-plug systems |
| ESD rating (HBM) | ±2000 V - meets JEDEC JESD22-A114A for robust handling in automated assembly and field service |
| Off-capacitance (Cio(OFF)) | 9 pF at VO = 3 V - minimizes crosstalk and signal integrity degradation in high-speed parallel buses |
| Operating temperature | –40 °C to +85 °C - qualified for enterprise computing and industrial control environments |
Pinout & Package
74CBTLV3245ADWG4 uses a 20-pin TSSOP (PW) package measuring 6.50 mm × 4.40 mm with standard '245-type pinout and exposed thermal pad (not electrically connected). Pin 1 is marked by index area; pin 10 is GND, pin 20 is VCC, and pin 19 is active-low OE.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1–A8 | Data I/O port A | Bidirectional analog/digital signal path; connects to port B when OE = low |
| B1–B8 | Data I/O port B | Mirror of port A; fully symmetric with no master/slave assignment |
| OE | Output Enable (active low) | Controls all 8 switches simultaneously; must be pulled up to VCC during power-up to avoid floating state |
| VCC | Power supply | Single 2.3–3.6 V supply; powers internal FET gates and bias circuitry |
| GND | Ground reference | Common return path for all signals and supply current; requires low-inductance connection |
| NC | No connect | Pin 1 has no internal connection; may be left floating or tied to GND per layout preference |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail analog switching | Supports full-swing signals from GND to VCC without clipping or distortion across all 8 channels |
| Ioff partial-power-down protection | Blocks damaging reverse current flow when VCC is unpowered, enabling safe integration into multi-supply systems |
| Standard '245 pinout compatibility | Direct replacement for legacy 74LVT245/74ALVC245 in existing PCB layouts with no redesign required |
| Low on-state resistance (5 Ω) | Reduces insertion loss and maintains signal integrity in high-frequency data paths up to 500 MHz |
| High-impedance isolation during disable | Ensures <100 kΩ isolation resistance and <9 pF capacitance between ports when OE = high |
Applications
| Server Backplane Switching | Industrial Motor Drive Interface |
|---|---|
Use Scenario: Isolating PCIe or SATA lanes between redundant controller modules in 1U rack servers. IC Role / Device Role / Timing Role: Bidirectional bus switch enabling hot-swap reconfiguration of storage or expansion links without system reset. Use Value: Sub-0.25 ns tpd and 5 Ω ron preserve signal eye diagram integrity at 6 Gbps, while Ioff prevents backfeed during module insertion/removal. |
Use Scenario: Routing encoder feedback signals between dual-axis motion controllers and shared FPGA I/O banks. IC Role / Device Role / Timing Role: Signal path selector isolating position/speed data streams during fault recovery or calibration sequences. Use Value: Rail-to-rail operation supports 0–3.3 V quadrature encoder outputs; 9 pF Cio(OFF) minimizes crosstalk between adjacent axes. |
| Wired Networking PHY Multiplexing | Building Automation Sensor Hub |
Use Scenario: Sharing a single Gigabit Ethernet PHY between two MAC processors in a managed switch ASIC design. IC Role / Device Role / Timing Role: Low-latency 8-bit data bus switch toggling MDIO/MDC and RGMII lanes under software control. Use Value: 2.3–3.6 V supply range matches both 2.5 V PHY and 3.3 V MAC voltage domains; no level-shifter needed. |
Use Scenario: Aggregating RS-485, DALI, and 0–10 V analog sensor inputs into a central HVAC controller SoC. IC Role / Device Role / Timing Role: Analog multiplexer enabling time-division sampling of multiple building subsystems via shared ADC channel. Use Value: 5 Ω ron introduces <0.1% gain error in 0–10 V measurements; Ioff prevents leakage between isolated sensor grounds. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBTLV3245APW | Same silicon die and electrical specs; identical PW (TSSOP-20) package with same 6.50 mm × 4.40 mm footprint and pinout | No functional difference; differs only in TI's internal orderable suffix convention (no G4 suffix) | Select SN74CBTLV3245APW if sourcing from TI's direct channel where G4 marking is not required |
| 74LVC245ADB | Higher ron (15 Ω typical), slower tpd (2.5 ns), no Ioff support, and narrower VCC range (1.65–3.6 V) | Suitable for cost-sensitive, non-hot-swap applications below 100 MHz; lacks partial-power-down safety | Choose 74LVC245ADB only for legacy designs where 5 Ω ron and Ioff are not required |
Compared with SN74CBTLV3245APW, the 74CBTLV3245ADWG4 offers identical performance but with TI's G4 green-compliance marking; versus 74LVC245ADB, it delivers 3× lower on-resistance, 10× faster switching, and critical Ioff protection for modern power-managed systems.
Availability
74CBTLV3245ADWG4 is available at Aetrix Electronics and suitable for datacenter backplane switching, industrial motor drive interfaces, and wired networking PHY multiplexing requiring stable component supply and long-term production continuity.
Supply support for 74CBTLV3245ADWG4 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 components.
The SN74CBTLV3245A product line delivers ultra-low-latency, low-power bus switching for high-speed digital infrastructure-designed specifically for enterprise computing, industrial automation, and next-generation networking equipment.
FAQ
What is the maximum operating frequency supported by the 74CBTLV3245ADWG4?
The 74CBTLV3245ADWG4 does not specify a hard maximum frequency but supports signal integrity up to 500 MHz due to its 5 Ω on-state resistance and 9 pF off-capacitance. Measured propagation delay of 0.15–0.25 ns enables reliable use in 6 Gbps serial links like SATA Gen3 when applied to individual data lanes.
Does the 74CBTLV3245ADWG4 require external pull-up resistors on the OE pin?
Yes-the 74CBTLV3245ADWG4 requires a pull-up resistor on OE to VCC during power-up to ensure high-impedance isolation until firmware asserts control. TI recommends a 10 kΩ resistor; floating OE may cause undefined switch states and excess current draw.
Can the 74CBTLV3245ADWG4 interface between 2.5 V and 3.3 V logic domains?
Yes-the 74CBTLV3245ADWG4 operates across 2.3–3.6 V and supports rail-to-rail switching, allowing seamless bidirectional signal transfer between 2.5 V and 3.3 V domains without level shifters. Its VCC-referenced thresholds ensure correct interpretation of control and data signals.
Is thermal pad soldering required for the 74CBTLV3245ADWG4 in TSSOP package?
No-the 74CBTLV3245ADWG4 in PW (TSSOP-20) package does not include an exposed thermal pad. Thermal dissipation relies on standard lead-frame conduction through pins 10 (GND) and 20 (VCC). Junction-to-ambient thermal resistance is 105.9 °C/W per datasheet.
How does the Ioff feature protect the 74CBTLV3245ADWG4 during partial power-down?
The Ioff feature limits reverse current to ≤40 µA when VCC = 0 V and any I/O pin is biased, preventing latch-up or damage during hot-swap events. This allows safe operation in multi-rail systems where one supply may be powered down while others remain active-verified per JESD78.
74CBTLV3245ADWG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74CBTLV
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Type:
- Bus Switch
- Circuit:
- 8 x 1:1
- 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:
- 20-SOIC
74CBTLV3245ADWG4 FAQ
1.How can I place an order for 74CBTLV3245ADWG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74CBTLV3245ADWG4 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 74CBTLV3245ADWG4 reliable?
The price and inventory of 74CBTLV3245ADWG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74CBTLV3245ADWG4 is usually 5 days.
3.What payment methods are accepted for 74CBTLV3245ADWG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74CBTLV3245ADWG4 transactions.
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4.How is shipping managed for 74CBTLV3245ADWG4?
74CBTLV3245ADWG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74CBTLV3245ADWG4 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 74CBTLV3245ADWG4?
For technical support, including 74CBTLV3245ADWG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74CBTLV3245ADWG4 requirements.
6.How does Aetrix verify that 74CBTLV3245ADWG4 is sourced from the original manufacturer or authorized distributors?
All 74CBTLV3245ADWG4 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 74CBTLV3245ADWG4 meets industry standards.
7.What is the process for return or replacement of 74CBTLV3245ADWG4?
All 74CBTLV3245ADWG4 units undergo pre-shipment inspection (PSI). If there is an issue with 74CBTLV3245ADWG4, 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 74CBTLV3245ADWG4 part is unused and in its original packaging.
Return procedure for 74CBTLV3245ADWG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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