My Inquiry
My Account
Texas Instruments SN74CBTLV3245ARGYR
- Part No.:
- SN74CBTLV3245ARGYR
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
SN74CBTLV3245ARGYR.pdf
- Description:
- IC BUS SWITCH 8 X 1:1 20VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:17,522
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74CBTLV3245ARGYR from Texas Instruments is a low-voltage octal FET bus switch in a 20-pin VQFN (RGY) 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 delivers sub-nanosecond propagation delay (0.15–0.25 ns), enabling high-speed data path isolation in enterprise computing and wired networking systems.
For engineers reviewing the SN74CBTLV3245ARGYR datasheet, SN74CBTLV3245ARGYR pinout, SN74CBTLV3245ARGYR application, or SN74CBTLV3245ARGYR equivalent, this page provides verified technical context, validated pin functions, real-world application mappings, and two confirmed alternative parts for system-level bus switching design decisions.
Technical Context
The SN74CBTLV3245ARGYR implements an 8-bit, single-pole single-throw (SPST) FET-based analog switch array with active-low output enable (OE). Its architecture enables bidirectional signal flow between A and B ports without level translation, supporting rail-to-rail voltage operation across the full supply range.
It features Ioff protection that limits backflow current to ≤40 µA when VCC = 0 V and any I/O is biased 0–3.6 V, ensuring safe isolation during power sequencing. The device maintains high-impedance state during power-up/down when OE is pulled to VCC via external resistor.
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 = 2.5 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 Current | ≤40 µA at VCC = 0 V - Prevents damaging back-current during partial power-down in multi-rail systems. |
| ESD Rating (HBM) | ±2000 V - Meets industrial-grade ESD robustness per JESD22-A114 without external protection. |
| Operating Temperature | –40 °C to +85 °C - Qualified for commercial/industrial environments including datacenter and building automation equipment. |
| Package | VQFN-20 (RGY), 4.5 mm × 3.5 mm, 1 mm max height - Compact footprint with exposed thermal pad for enhanced power dissipation. |
Pinout & Package
VQFN-20 (RGY) package with 0.5 mm pitch, 4.5 mm × 3.5 mm body, and exposed thermal pad (Pin 21) requiring PCB solder connection for thermal and mechanical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8, 9 | A1–A8 | Bidirectional data port A - Connects to upstream bus or controller; supports rail-to-rail analog/digital signals. |
| 11, 12, 13, 14, 15, 16, 17, 18 | B1–B8 | Bidirectional data port B - Connects to downstream peripheral or memory; electrically identical to A port. |
| 10 | GND | Ground reference - Must be low-impedance connection to minimize noise coupling into switch channels. |
| 19 | OE | Active-low output enable - Driven low to connect A↔B; high to isolate ports; requires pull-up to VCC for power-up safety. |
| 20 | VCC | Power supply - Supplies internal bias and switch FETs; requires local 0.1 µF decoupling capacitor. |
| 1 | NC | No internal connection - May be left floating or tied to GND; no electrical function. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail switching | Supports input/output signals from GND to VCC without clipping - preserves full logic swing in mixed-voltage systems. |
| Ioff partial-power-down protection | Blocks back-current flow when VCC = 0 V - eliminates need for external isolation diodes in hot-swap or power-gated designs. |
| Standard '245-type pinout | Pin-compatible with legacy 74-series bus transceivers - simplifies drop-in replacement in existing layouts using SSOP/TSSOP footprints. |
| Low on-state capacitance | Cio(OFF) = 9 pF - Reduces loading on high-impedance source nodes and minimizes signal integrity degradation. |
| Latch-up immunity | Exceeds 250 mA per JESD17 - Ensures robust operation under transient overvoltage or ground bounce conditions. |
Applications
| Datacenter Server Backplane | Industrial Ethernet Switch |
|---|---|
|
Use Scenario: Isolating PCIe or SATA lanes during hot-plug insertion of expansion modules. IC Role / Device Role / Timing Role: Bidirectional bus switch controlling physical layer connectivity between host and add-in card. Use Value: Enables zero-latency signal path enable/disable with <0.25 ns delay and no level-shifting overhead. |
Use Scenario: Selecting between redundant PHY interfaces in managed Ethernet switches. IC Role / Device Role / Timing Role: High-speed digital multiplexer routing 100BASE-TX or 1000BASE-T differential pairs. Use Value: Delivers 5 Ω ron and ±2000 V HBM ESD protection to maintain link integrity in noisy factory environments. |
| Building Automation Controller | Motor Drive Communication Interface |
|
Use Scenario: Enabling/disabling RS-485 transceiver connections to field devices during firmware updates. IC Role / Device Role / Timing Role: Signal path gate isolating communication lines while preserving common-mode voltage range. Use Value: Ioff protection prevents backfeed into powered-down MCU peripherals during maintenance mode. |
Use Scenario: Routing encoder feedback signals between multiple motor control ICs sharing a single ADC input. IC Role / Device Role / Timing Role: Low-distortion analog switch handling quadrature encoder waveforms up to 10 MHz. Use Value: Rail-to-rail operation ensures full amplitude capture of 0–3.3 V encoder outputs without clipping. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBTLV3245APWR | TSSOP-20 (PW) package, 6.5 mm × 4.4 mm; thermal resistance RθJA = 105.9 °C/W vs. RGY's 80.8 °C/W. | Better suited for manual assembly or prototyping due to gull-wing leads; less optimal for high-density automated PCBs. | Select SN74CBTLV3245APWR if board space allows larger footprint and hand-soldering is required. |
| SN74LVC245APW | True 8-bit transceiver (3-state) with direction control (DIR); not a switch - lacks bidirectional analog pass-through capability. | Applicable only where unidirectional data flow and level translation (1.65–3.6 V) are needed, not signal isolation. | Choose SN74LVC245APW only when direction-controlled buffering-not passive switching-is the system requirement. |
Compared with SN74CBTLV3245ARGYR, SN74CBTLV3245APWR offers identical electrical performance in a more serviceable package, while SN74LVC245APW serves fundamentally different functional roles-making it unsuitable as a direct replacement despite shared pin count and logic family.
Availability
SN74CBTLV3245ARGYR is available at Aetrix Electronics and suitable for datacenter server backplanes, industrial Ethernet switches, and building automation controllers requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for SN74CBTLV3245ARGYR 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 solutions, with decades of expertise in high-speed interface and power management ICs.
The SN74CBTLV3245A product line delivers low-voltage, low-distortion bus switching for enterprise infrastructure and industrial communications, targeting applications demanding minimal propagation delay and robust power sequencing behavior.
FAQ
What is the maximum operating temperature for SN74CBTLV3245ARGYR?
The SN74CBTLV3245ARGYR is rated for operation from –40 °C to +85 °C ambient temperature. This specification applies specifically to the RGY (VQFN-20) package variant and is validated per JEDEC JESD47 thermal testing standards. Operation beyond 85 °C may degrade parametric performance or reliability and is not guaranteed.
Does SN74CBTLV3245ARGYR support bidirectional signal flow?
Yes, SN74CBTLV3245ARGYR supports fully bidirectional signal flow between its A and B ports. There is no inherent directionality - signals pass equally well from A-to-B or B-to-A when OE is low. This makes SN74CBTLV3245ARGYR ideal for applications like PCIe lane switching or shared bus arbitration where data direction changes dynamically.
What is the purpose of the NC pin on SN74CBTLV3245ARGYR?
Pin 1 of SN74CBTLV3245ARGYR is labeled NC (No Connection) and has no internal bond wire or circuit connection. It may be left floating or tied to GND for mechanical stability or EMI reduction, but it performs no electrical function. TI confirms this pin is unused in all package variants including RGY.
Can SN74CBTLV3245ARGYR operate at 2.5 V supply?
Yes, SN74CBTLV3245ARGYR is fully specified for 2.5 V operation. Its recommended operating range is 2.3 V to 3.6 V, and key parameters-including 5 Ω typical ron, 0.15–0.25 ns tpd, and Ioff ≤40 µA-are characterized at VCC = 2.5 V. This enables seamless integration with 2.5 V FPGA I/O banks and ASIC core voltages.
Is a pull-up resistor required on the OE pin of SN74CBTLV3245ARGYR?
Yes, TI explicitly recommends tying OE to VCC via a pull-up resistor during power-up and power-down to ensure the switch remains in high-impedance state. A floating OE can cause unintended conduction, excess current draw, or latch-up. Minimum resistor value depends on driver sink capability but is typically 10 kΩ for standard CMOS drivers.
SN74CBTLV3245ARGYR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74CBTLV
- Package/Case:
- 20-VFQFN Exposed Pad
- 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-VQFN (3.5x4.5)
SN74CBTLV3245ARGYR FAQ
1.How can I place an order for SN74CBTLV3245ARGYR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74CBTLV3245ARGYR 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 SN74CBTLV3245ARGYR reliable?
The price and inventory of SN74CBTLV3245ARGYR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74CBTLV3245ARGYR is usually 5 days.
3.What payment methods are accepted for SN74CBTLV3245ARGYR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74CBTLV3245ARGYR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74CBTLV3245ARGYR?
SN74CBTLV3245ARGYR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74CBTLV3245ARGYR 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 SN74CBTLV3245ARGYR?
For technical support, including SN74CBTLV3245ARGYR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74CBTLV3245ARGYR requirements.
6.How does Aetrix verify that SN74CBTLV3245ARGYR is sourced from the original manufacturer or authorized distributors?
All SN74CBTLV3245ARGYR 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 SN74CBTLV3245ARGYR meets industry standards.
7.What is the process for return or replacement of SN74CBTLV3245ARGYR?
All SN74CBTLV3245ARGYR units undergo pre-shipment inspection (PSI). If there is an issue with SN74CBTLV3245ARGYR, 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 SN74CBTLV3245ARGYR part is unused and in its original packaging.
Return procedure for SN74CBTLV3245ARGYR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74CBTLV3245ARGYR Tags
-
SN74HC138DR
Texas Instruments
-
TC7SB3157CFU,LF(CT
Toshiba Semiconductor and Storage
-
74CBTLV3257PW,118
Nexperia USA Inc.
-
SN74CBTLV3257PWR
Texas Instruments
-
74CBTLV3257GUX
Nexperia USA Inc.
-
74HC154BQ,118
Nexperia USA Inc.
-
P3S0200GMX
NXP USA Inc.
-
SN74CB3Q3245PWR
Texas Instruments
-
SN74CB3Q3257RGYR
Texas Instruments
-
TCA9543APWR
Texas Instruments
-
TCA9546APWR
Texas Instruments
-
SN74HC138N
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
