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Texas Instruments SN74CBTLV3245ADGVR
- Part No.:
- SN74CBTLV3245ADGVR
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 20-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74CBTLV3245ADGVR.pdf
- Description:
- IC BUS SWITCH 8 X 1:1 20TVSOP
- Quantity:
- Payment:
- Shipping:
Inventory:14,643
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Product details
Overview
SN74CBTLV3245ADGVR from Texas Instruments is a low-voltage octal FET bus switch in 20-pin TVSOP (DGV) package, providing bidirectional 8-bit signal routing with 5 Ω on-state resistance, rail-to-rail switching, and Ioff support for partial-power-down operation. It enables high-speed data path isolation in enterprise computing and wired networking systems.
For engineers reviewing the SN74CBTLV3245ADGVR datasheet, SN74CBTLV3245ADGVR pinout, SN74CBTLV3245ADGVR application, or SN74CBTLV3245ADGVR equivalent, key selection criteria include its 2.3–3.6 V supply range, <0.25 ns propagation delay, ±2000 V HBM ESD rating, and compatibility with standard '245-type PCB layouts.
Technical Context
The SN74CBTLV3245ADGVR implements eight independent FET-based analog switches controlled by a single active-low output enable (OE) input. When OE is low, A-port pins connect directly to corresponding B-port pins with minimal on-resistance and near-zero propagation delay; when OE is high, both ports enter high-impedance states.
Its Ioff feature ensures sub-40 µA leakage current when VCC = 0 V and any I/O is biased between 0–3.6 V, preventing backflow during power sequencing. The device operates across –40°C to 85°C (DBQ/DGV/DW/PW/RGY packages) and supports rail-to-rail signal swing without level translation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.3 V to 3.6 V - Enables direct interface with 2.5 V and 3.3 V logic domains without level shifters. |
| On-State Resistance (ron) | 5 Ω typical at VCC = 3.3 V, IO = 64 mA - Minimizes voltage drop and signal distortion in high-speed data paths. |
| Propagation Delay (tpd) | 0.15–0.25 ns - Supports >1 GHz signal bandwidth with negligible timing impact on critical buses. |
| Ioff Leakage Current | 40 µA max at VCC = 0 V - Ensures robust isolation and prevents damaging back-current during partial power-down. |
| ESD Rating (HBM) | ±2000 V - Meets industrial-grade electrostatic immunity requirements without external protection. |
| Operating Temperature | –40°C to +85°C - Qualified for use in enterprise servers, networking equipment, and building automation hardware. |
| Package | TVSOP-20 (DGV), 5.00 mm × 4.40 mm - Compact surface-mount footprint compatible with automated assembly and high-density PCBs. |
Pinout & Package
SN74CBTLV3245ADGVR uses the DGV (TVSOP-20) package: 20-pin thin very small outline package, 5.00 mm × 4.40 mm body size, 0.65 mm lead pitch, with exposed thermal pad not present in this variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, NC | No-connect terminal | Internally unconnected; may be tied to GND or left floating per layout requirements. |
| 2–9, A1–A8 | Data I/O port A | Bidirectional signal terminals; electrically identical to B-port pins when switch is enabled. |
| 10, GND | Ground reference | Primary return path for all internal circuitry and signal currents. |
| 11–18, B1–B8 | Data I/O port B | Mirror of A-port; connects to A-port under OE control with 5 Ω ron. |
| 19, OE | Output Enable (active low) | Asserting low enables bidirectional A↔B connection; high forces high-impedance isolation. |
| 20, VCC | Power supply input | Supplies core logic and switch FETs; requires local 0.1 µF decoupling capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Standard '245-type pinout | Enables drop-in replacement for legacy 74-series bus switches without PCB redesign. |
| Rail-to-rail switching | Supports full-swing signals from GND to VCC without clipping or distortion on either side of the switch. |
| Ioff partial-power-down | Prevents current backflow when VCC = 0 V and I/O pins are driven externally, protecting powered-down subsystems. |
| 5 Ω low on-resistance | Reduces insertion loss and maintains signal integrity for high-frequency parallel buses up to 1 GHz. |
| Latch-up immunity | Exceeds 250 mA per JESD17 - Ensures robust operation in noisy industrial environments with transient coupling. |
Applications
| Datacenter Server Backplane | Industrial Ethernet Switch |
|---|---|
|
Use Scenario: Isolating PCIe or SMBus lanes during hot-swap or firmware update sequences. IC Role / Device Role / Timing Role: Bidirectional bus switch enabling dynamic reconfiguration of control and status signals between CPU and peripheral modules. Use Value: Prevents signal contention and ground bounce during live insertion/removal while maintaining <0.25 ns timing margin. |
Use Scenario: Selecting between redundant PHY interfaces or multiplexing MDIO management lines across multiple MACs. IC Role / Device Role / Timing Role: Low-latency signal path selector for 10/100/1000BASE-T control and status signals. Use Value: Eliminates need for discrete MOSFET arrays or complex CPLD logic, reducing BOM count and layout area. |
| Building Automation Controller | Motor Drive Communication Hub |
|
Use Scenario: Sharing a single RS-485 transceiver among multiple microcontrollers in HVAC or lighting control panels. IC Role / Device Role / Timing Role: Bidirectional bus switch managing half-duplex serial communication arbitration. Use Value: Provides deterministic signal routing with 5 Ω channel resistance, avoiding signal degradation over long traces. |
Use Scenario: Isolating encoder feedback lines or PWM command paths during motor fault conditions. IC Role / Device Role / Timing Role: High-speed analog/digital signal gate for safety-critical motion control loops. Use Value: Delivers <1 ns enable/disable timing and sub-40 µA Ioff leakage to meet SIL-2 functional safety requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBT3245CPW | Higher 7–10 Ω ron, no Ioff support, rated only to 70°C ambient. | Not suitable for partial-power-down or extended temperature industrial use. | Select SN74CBTLV3245ADGVR where low on-resistance, wide temp range, or Ioff are required. |
| SN74LVC2G66DCUR | Single-channel, 5-pin SOT-23 package, 6 Ω ron, same VCC range but no '245 pinout compatibility. | Requires 8× placement and routing for octal function; lacks pin-for-pin upgrade path. | Choose SN74CBTLV3245ADGVR for space-constrained designs needing full octal integration and legacy layout reuse. |
Compared with SN74CBT3245CPW and SN74LVC2G66DCUR, SN74CBTLV3245ADGVR uniquely combines octal density, 5 Ω ron, Ioff protection, and standard '245 pinout-enabling higher reliability, lower signal loss, and zero-layout-change upgrades in enterprise and industrial systems.
Availability
SN74CBTLV3245ADGVR is available at Aetrix Electronics and suitable for datacenter server backplanes, industrial Ethernet switches, and building automation controllers requiring stable component supply across multi-year production cycles.
Supply support for SN74CBTLV3245ADGVR 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 delivering analog and embedded processing solutions for industrial, automotive, and communications markets.
The SN74CBTLV3245ADGVR belongs to TI's low-voltage logic bus switch family, engineered for high-speed signal routing in power-sensitive, thermally constrained, and reliability-critical infrastructure applications.
FAQ
What is the maximum operating temperature for SN74CBTLV3245ADGVR?
The SN74CBTLV3245ADGVR is specified for operation from –40°C to +85°C ambient temperature when packaged in the DGV (TVSOP-20) variant. This range is validated per JEDEC JESD22-A104 and applies to all electrical and switching characteristics in the official datasheet SCDS034N.
Does SN74CBTLV3245ADGVR support true bidirectional signal flow?
Yes, SN74CBTLV3245ADGVR provides fully bidirectional signal routing: A1–A8 and B1–B8 pins are functionally identical and interchangeable. Signal direction depends solely on external driver location-not internal architecture-enabling flexible PCB layout and protocol-agnostic use in I²C, SMBus, or GPIO expansion paths.
Can SN74CBTLV3245ADGVR be used with 2.5 V and 3.3 V mixed-voltage systems?
Yes, SN74CBTLV3245ADGVR operates across 2.3 V to 3.6 V, making it compatible with both 2.5 V and 3.3 V logic families. Its rail-to-rail switching supports full-swing signals within that supply range, eliminating level-shifting components when interfacing between these domains.
What is the recommended pull-up resistor value for OE on SN74CBTLV3245ADGVR?
Texas Instruments recommends tying OE to VCC via a pull-up resistor to maintain high-impedance state during power-up/down. The minimum value is determined by the current-sinking capability of the driving source; for standard CMOS drivers, 4.7 kΩ to 10 kΩ is typical and ensures reliable disable timing without excessive current draw.
Is SN74CBTLV3245ADGVR pin-compatible with older 74-series bus switches?
Yes, SN74CBTLV3245ADGVR features standard '245-type pinout, matching the physical and functional arrangement of industry-standard octal bus switches like the 74LS245 and 74ACT245. This allows direct PCB-level replacement without layout modification, provided supply and timing constraints are met.
SN74CBTLV3245ADGVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74CBTLV
- Package/Case:
- 20-TFSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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-TVSOP
SN74CBTLV3245ADGVR FAQ
1.How can I place an order for SN74CBTLV3245ADGVR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74CBTLV3245ADGVR 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 SN74CBTLV3245ADGVR reliable?
The price and inventory of SN74CBTLV3245ADGVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74CBTLV3245ADGVR is usually 5 days.
3.What payment methods are accepted for SN74CBTLV3245ADGVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74CBTLV3245ADGVR transactions.
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4.How is shipping managed for SN74CBTLV3245ADGVR?
SN74CBTLV3245ADGVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74CBTLV3245ADGVR 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 SN74CBTLV3245ADGVR?
For technical support, including SN74CBTLV3245ADGVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74CBTLV3245ADGVR requirements.
6.How does Aetrix verify that SN74CBTLV3245ADGVR is sourced from the original manufacturer or authorized distributors?
All SN74CBTLV3245ADGVR 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 SN74CBTLV3245ADGVR meets industry standards.
7.What is the process for return or replacement of SN74CBTLV3245ADGVR?
All SN74CBTLV3245ADGVR units undergo pre-shipment inspection (PSI). If there is an issue with SN74CBTLV3245ADGVR, 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 SN74CBTLV3245ADGVR part is unused and in its original packaging.
Return procedure for SN74CBTLV3245ADGVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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