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Texas Instruments 74CBTLV3245APWRE4
- Part No.:
- 74CBTLV3245APWRE4
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74CBTLV3245APWRE4.pdf
- Description:
- IC BUS SWITCH 8 X 1:1 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,539
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Product details
Overview
74CBTLV3245APWRE4 from Texas Instruments is a low-voltage octal FET bus switch in TSSOP-20 package, providing bidirectional 8-bit signal routing with 5 Ω typical on-state resistance, rail-to-rail switching, and Ioff partial-power-down support. It operates from 2.3 V to 3.6 V and enables high-speed data path isolation in enterprise computing and wired networking systems.
For engineers reviewing the 74CBTLV3245APWRE4 datasheet, 74CBTLV3245APWRE4 pinout, 74CBTLV3245APWRE4 application, or 74CBTLV3245APWRE4 equivalent, this device delivers sub-nanosecond propagation delay (0.15–0.25 ns), ±2000-V HBM ESD protection, and guaranteed high-impedance isolation during power sequencing - critical for hot-swap interfaces and mixed-voltage domain bridging.
Technical Context
The 74CBTLV3245APWRE4 implements eight independent NMOS pass-gate switches controlled by a single active-low OE input, enabling or disabling bidirectional conduction between A- and B-side I/O ports. Its rail-to-rail analog switching supports logic levels across the full supply range without level-shifting circuitry.
Designed for partial-power-down operation, the device features Ioff protection that limits backflow current to ≤40 µA when VCC = 0 V and any I/O is biased between 0–3.6 V, ensuring system-level isolation during standby or fault conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3 V to 3.6 V - compatible with 2.5 V and 3.3 V logic domains without external level shifters |
| ron (Typ) | 5 Ω at VCC = 2.5 V, IO = 64 mA - minimizes voltage drop and signal distortion in high-speed data paths |
| tpd | 0.15–0.25 ns - enables >1 GHz signal routing with negligible propagation delay penalty |
| Ioff | ≤40 µA at VCC = 0 V - prevents damaging back-current during power sequencing or hot-plug events |
| ESD Rating | ±2000 V HBM - meets JEDEC JESD22-A114-A for robust handling in automated assembly and field environments |
| Operating Temp | –40 °C to +85 °C - qualified for industrial-grade deployment in datacenter and networking equipment |
| Package | TSSOP-20 (PW), 6.50 mm × 4.40 mm - surface-mount compatible with standard reflow profiles and IPC-7351 land patterns |
Pinout & Package
TSSOP-20 (PW) package: 0.65 mm pitch, 6.50 mm × 4.40 mm body, 1.2 mm max height, exposed thermal pad optional per RGY/RKS variants - not present in PW variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, NC | No-connect | Internally unconnected; may be tied to GND or left floating without functional impact |
| 2–9, A1–A8 | Data I/O (Port A) | Bidirectional signal terminals; function as inputs or outputs depending on OE state and connected load |
| 10, GND | Ground reference | Primary return path for switch current and logic control; must be low-impedance for noise immunity |
| 11–18, B1–B8 | Data I/O (Port B) | Mirror of Port A; electrically identical and interchangeable in signal routing applications |
| 19, OE | Output Enable (active low) | Controls switch state: low = A↔B connected; high = high-impedance isolation; requires pull-up to VCC for power-up safety |
| 20, VCC | Supply voltage | Single 2.3–3.6 V rail powers all internal circuitry and defines logic threshold and ron performance |
Key Features
| Feature | Design Value |
|---|---|
| Standard '245-type pinout | Enables drop-in replacement of legacy 74-series bus switches without PCB layout changes |
| Rail-to-rail switching | Supports full-swing analog or digital signals from GND to VCC without clipping or distortion |
| Ioff partial-power-down | Prevents back-current flow when VCC is off, protecting upstream drivers and downstream loads |
| 5 Ω typical on-resistance | Reduces insertion loss and timing skew in high-frequency parallel buses (e.g., address/data lines) |
| Sub-1 ns enable/disable times | ten ≤ 4.7 ns and tdis ≤ 6.4 ns at VCC = 3.3 V - suitable for dynamic bus arbitration and burst-mode control |
Applications
| Datacenter Interconnect | Industrial Ethernet Switching |
|---|---|
|
Use Scenario: Isolating PCIe or DDR memory traces during firmware update or hot-swap module insertion. IC Role / Device Role / Timing Role: Bidirectional bus switch enabling/disabling signal paths under microcontroller control via OE. Use Value: Prevents signal contention and ground bounce during reconfiguration while maintaining <1 ns timing integrity. |
Use Scenario: Routing 10/100/1000BASE-T PHY signals between redundant MAC controllers in ruggedized switches. IC Role / Device Role / Timing Role: Low-capacitance (9 pF Cio(OFF)) analog switch for Ethernet differential pairs and management interfaces. Use Value: Enables failover switching with <0.25 ns added delay and no level translation required across 3.3 V domains. |
| Building Automation Hub | Motor Drive Control Interface |
|
Use Scenario: Multiplexing RS-485 transceiver connections among multiple HVAC controller nodes on shared bus. IC Role / Device Role / Timing Role: High-impedance isolation gate preventing bus contention when node is powered down or in reset. Use Value: Eliminates need for discrete MOSFETs or relays; Ioff ensures zero leakage current into inactive nodes. |
Use Scenario: Enabling/disabling encoder feedback lines or PWM gate-drive signals during motor startup or fault recovery. IC Role / Device Role / Timing Role: Fast-switching interface isolator placed between MCU GPIO and isolated gate driver ICs. Use Value: Guarantees clean signal break-before-make behavior with <5 ns transition uncertainty, avoiding shoot-through risk. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBTLV3245ADWRE4 | SOIC-20 package (12.8 mm × 7.5 mm); higher RθJA (58 °C/W) vs. PW's 105.9 °C/W; same electrical specs | Better thermal mass for low-power continuous operation; less suitable for dense PCB layouts | Select for legacy board compatibility or manual soldering; avoid in thermally constrained 4-layer designs |
| SN74CBTLV3245APWR | Same TSSOP-20 package but non-E4 suffix - RoHS-compliant, non-lead-free plating; identical functionality | No difference in electrical or thermal performance; differs only in finish and compliance documentation | Choose 74CBTLV3245APWRE4 for lead-free assembly and IPC/JEDEC Class 3 process compliance |
Compared with SN74CBTLV3245ADWRE4 and SN74CBTLV3245APWR, the 74CBTLV3245APWRE4 offers optimal density and lead-free manufacturability for high-volume networking modules, while retaining full functional equivalence and pin compatibility across the SN74CBTLV3245A family.
Availability
74CBTLV3245APWRE4 is available at Aetrix Electronics and suitable for datacenter interconnect, industrial Ethernet switching, and building automation requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 74CBTLV3245APWRE4 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 50 years of innovation in high-reliability interface solutions.
The SN74CBTLV3245A product line delivers ultra-low-latency, low-power bus switching for high-speed digital systems - designed specifically for signal integrity-critical applications in computing, communications, and industrial control.
FAQ
What is the maximum operating temperature for the 74CBTLV3245APWRE4?
The 74CBTLV3245APWRE4 is rated for operation from –40 °C to +85 °C ambient temperature when packaged in TSSOP-20 (PW). This rating applies to all electrical specifications including ron, tpd, and Ioff. The device uses the DBQ/DGV/DW/PW/RGY package group, which shares this industrial temperature grade.
Does the 74CBTLV3245APWRE4 support hot-swap operation?
Yes, the 74CBTLV3245APWRE4 supports hot-swap operation through its Ioff feature, which limits back-current to ≤40 µA when VCC = 0 V and I/O pins are biased between 0–3.6 V. This prevents damage to live backplane traces or upstream drivers during insertion, making it suitable for modular server and telecom line-card designs.
What is the recommended pull-up resistor value for the OE pin on the 74CBTLV3245APWRE4?
Texas Instruments recommends tying OE to VCC via a pull-up resistor to maintain high-impedance state during power-up. The minimum value is determined by the current-sinking capability of the driving source; for standard CMOS drivers, a 10-kΩ resistor is typical and ensures reliable deassertion while minimizing quiescent current.
Can the 74CBTLV3245APWRE4 be used for analog signal switching?
Yes, the 74CBTLV3245APWRE4 supports rail-to-rail analog switching with 5 Ω typical on-resistance and 9 pF off-state capacitance. It preserves signal integrity for low-frequency analog signals (e.g., audio, sensor outputs) and high-speed digital waveforms up to ~1 GHz, provided VIN remains within the 0–VCC range and load impedance is ≥1 kΩ.
Is the 74CBTLV3245APWRE4 pin-compatible with older 74-series bus switches?
Yes, the 74CBTLV3245APWRE4 uses the standard '245-type pinout defined in JEDEC MS-012, matching pin-for-pin with industry-standard octal bus transceivers like the 74LVC245A. This allows direct substitution in existing designs without layout modification, provided voltage and timing margins are verified.
74CBTLV3245APWRE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74CBTLV
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- 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-TSSOP
74CBTLV3245APWRE4 FAQ
1.How can I place an order for 74CBTLV3245APWRE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74CBTLV3245APWRE4 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 74CBTLV3245APWRE4 reliable?
The price and inventory of 74CBTLV3245APWRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74CBTLV3245APWRE4 is usually 5 days.
3.What payment methods are accepted for 74CBTLV3245APWRE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74CBTLV3245APWRE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74CBTLV3245APWRE4?
74CBTLV3245APWRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74CBTLV3245APWRE4 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 74CBTLV3245APWRE4?
For technical support, including 74CBTLV3245APWRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74CBTLV3245APWRE4 requirements.
6.How does Aetrix verify that 74CBTLV3245APWRE4 is sourced from the original manufacturer or authorized distributors?
All 74CBTLV3245APWRE4 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 74CBTLV3245APWRE4 meets industry standards.
7.What is the process for return or replacement of 74CBTLV3245APWRE4?
All 74CBTLV3245APWRE4 units undergo pre-shipment inspection (PSI). If there is an issue with 74CBTLV3245APWRE4, 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 74CBTLV3245APWRE4 part is unused and in its original packaging.
Return procedure for 74CBTLV3245APWRE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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