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Texas Instruments 74CBTLV3125PWRG4
- Part No.:
- 74CBTLV3125PWRG4
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74CBTLV3125PWRG4.pdf
- Description:
- IC BUS SWITCH 1 X 1:1 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,020
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Product details
Overview
74CBTLV3125PWRG4 from Texas Instruments is a low-voltage quadruple FET bus switch with independent 5Ω on-state resistance, rail-to-rail signal switching, and Ioff partial-power-down support. It operates from 2.3V to 3.6V, delivers sub-5ns enable/disable times, and isolates ports during power-off-used in JTAG/SPI signal routing for enterprise servers and industrial controllers.
For engineers reviewing the 74CBTLV3125PWRG4 datasheet, 74CBTLV3125PWRG4 pinout, 74CBTLV3125PWRG4 application, or 74CBTLV3125PWRG4 equivalent, key selection criteria include guaranteed 5Ω ron at 3.3V/64mA, −40°C to 85°C operation in TSSOP-14, Ioff leakage ≤10µA at VCC = 0V, and OE-active-high logic compatibility with 1.7V VIH min.
Technical Context
The 74CBTLV3125PWRG4 implements four independent bilateral FET switches, each controlled by a dedicated active-high output-enable (OE) input. Each switch connects A and B ports bidirectionally with no direction pin, enabling transparent signal pass-through when enabled and high-impedance isolation when disabled.
Its Ioff architecture blocks current backflow when VCC = 0V, supporting hot-swap and live-insertion systems. The device maintains latch-up immunity >100 mA per JESD78 Class II and supports rail-to-rail input/output voltage swing across the full 0V–3.3V range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-state resistance (ron) | 5 Ω typical at VCC = 3.3V, 64mA - ensures minimal voltage drop and signal attenuation in high-speed digital paths. |
| Supply voltage range | 2.3V to 3.6V - compatible with 2.5V and 3.3V logic domains without level translation. |
| Ioff leakage current | ≤10 µA at VCC = 0V - prevents damaging back-current during partial power-down or hot-swap events. |
| Enable/disable time (ten/tdis) | 2 ns to 4.4 ns at VCC = 3.3V - enables fast channel switching for dynamic protocol isolation. |
| Operating temperature | −40°C to +85°C - qualified for industrial and enterprise computing environments. |
| ESD rating (HBM) | ±2000 V - meets JEDEC JS-001 for robust handling in automated assembly and field service. |
| Propagation delay (tpd) | 0.25 ns typical at VCC = 3.3V - preserves signal integrity in sub-nanosecond timing-critical buses. |
Pinout & Package
TSSOP-14 package (PW), 5.00 mm × 4.40 mm body size, 0.65 mm pitch, surface-mount, RoHS-compliant, moisture sensitivity level (MSL) 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A, 1B, 2A, 2B, 3A, 3B, 4A, 4B | I/O data port pair | Bidirectional signal path; no internal direction control - A and B are electrically symmetric. |
| 1OE, 2OE, 3OE, 4OE | Digital control input | Active-high enable; high = open-circuit isolation, low = 5Ω connection between corresponding A/B ports. |
| VCC | Power supply | Single 2.3–3.6V supply; powers all four switches and control logic. |
| GND | Ground reference | Common return for signal and supply; must be low-impedance for noise-free switching. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail signal switching | Supports full 0V–3.3V swing on all I/O ports - eliminates need for external level shifters in mixed-voltage systems. |
| Ioff partial-power-down protection | Blocks back-current when VCC = 0V - enables safe hot-plug of peripheral modules without system-wide power sequencing. |
| Low on-state resistance | 5Ω typical at 3.3V - minimizes insertion loss and timing skew in high-speed GPIO, JTAG, and SPI traces. |
| High ESD immunity | ±2000V HBM - reduces field failure risk in manufacturing, test, and deployment environments. |
| Latch-up immunity | >100 mA per JESD78 Class II - ensures robust operation under transient overvoltage or ground bounce conditions. |
Applications
| Server Backplane Signal Isolation | JTAG Debug Port Multiplexing |
|---|---|
Use Scenario: Isolating redundant CPU debug interfaces on dual-socket server motherboards to prevent cross-talk during firmware update. IC Role / Device Role / Timing Role: Bidirectional signal gate controlling TDI/TDO/TCK/TMS lines between host processor and target SoC. Use Value: Enables single debug controller to service multiple CPUs via software-selectable 74CBTLV3125PWRG4 channels without hardware reconfiguration. |
Use Scenario: Sharing one JTAG probe across multiple FPGA or ASIC devices on a development board. IC Role / Device Role / Timing Role: Low-latency, low-distortion analog switch routing debug signals to selected device while blocking others. Use Value: Achieves <0.25ns propagation delay and 5Ω ron to preserve JTAG timing margins up to 50 MHz. |
| Industrial PLC I/O Module Expansion | Enterprise SSD Controller Interface Switching |
Use Scenario: Dynamically routing GPIO or SPI control lines between main controller and hot-swappable I/O expansion cards. IC Role / Device Role / Timing Role: Power-fail-safe bus switch enabling/disabling peripheral communication links during module insertion/removal. Use Value: Ioff ≤10µA prevents backfeed into unpowered modules, eliminating need for auxiliary power sequencing circuitry. |
Use Scenario: Selecting between primary and backup NAND flash controllers in high-availability SSDs. IC Role / Device Role / Timing Role: High-bandwidth, low-skew signal bridge for command/address/data lanes between controller and flash packages. Use Value: 5Ω ron and rail-to-rail operation maintain signal integrity across 3.3V DDR-like interfaces without degrading setup/hold timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar FET bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBTLV3125PWR | Same silicon, identical electrical specs, same TSSOP-14 package, but lead finish NIPDAU without G4 suffix (RoHS-compliant, MSL-1). | No functional difference; used where G4 marking or specific tape-and-reel packaging not required. | Select 74CBTLV3125PWRG4 when traceability, MSL-1 qualification, or TI's standard G4 marking is specified in BOM. |
| SN74CBTLV3244PWR | Octal (8-channel) version, same ron (5Ω), same VCC range, but different pinout and higher channel count; requires PCB redesign. | Suitable for systems needing more than four isolated channels per IC, e.g., multi-lane SPI or parallel bus isolation. | Choose SN74CBTLV3244PWR only if additional channel density justifies layout change; not pin-compatible with 74CBTLV3125PWRG4. |
Compared with SN74CBTLV3125PWR, the 74CBTLV3125PWRG4 offers identical performance with enhanced traceability and packaging compliance; compared with SN74CBTLV3244PWR, it provides half the channel count in the same footprint but avoids unnecessary complexity in four-channel designs.
Availability
74CBTLV3125PWRG4 is available at Aetrix Electronics and suitable for enterprise server backplanes, industrial PLC I/O modules, and SSD controller interface routing requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 74CBTLV3125PWRG4 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, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.
The SN74CBTLV3125 product line delivers ultra-low-resistance, low-voltage FET bus switches optimized for signal routing, protocol isolation, and hot-swap interface management in high-reliability digital systems.
FAQ
What is the maximum continuous current per channel for the 74CBTLV3125PWRG4?
The 74CBTLV3125PWRG4 supports a continuous channel current of 128 mA per switch, verified across its full operating temperature range (−40°C to +85°C) and supply voltage range (2.3V to 3.6V). This rating ensures reliable operation in high-drive GPIO, JTAG, and SPI applications without thermal derating under typical PCB copper weight and airflow conditions.
Does the 74CBTLV3125PWRG4 support operation at 1.8V logic levels?
No - the 74CBTLV3125PWRG4 is not rated for 1.8V supply operation. Its recommended VCC range is 2.3V to 3.6V. However, it accepts 1.8V-compatible control inputs: VIH(min) = 1.7V at VCC = 2.3V–2.7V, allowing direct interfacing with 1.8V microcontrollers driving the OE pins while powered from 2.5V or 3.3V.
How does the Ioff feature function in the 74CBTLV3125PWRG4 during power-down?
In the 74CBTLV3125PWRG4, Ioff limits current flow to ≤10 µA when VCC = 0V and any I/O port is biased between 0V and 3.6V. This prevents back-current from powered downstream circuits into the unpowered switch, protecting both the 74CBTLV3125PWRG4 and connected devices during hot-swap or partial system shutdown.
Is the 74CBTLV3125PWRG4 pin-compatible with older 74CBT3125 variants?
No - the 74CBTLV3125PWRG4 is not pin-compatible with non-LV (e.g., 74CBT3125) variants. While both are 14-pin TSSOP devices, the LV version uses different internal architecture, lower voltage thresholds, and updated thermal design. Pin mapping matches SN74CBTLV3125 family members (e.g., PWR, PWRG4, PWRE4), not legacy CBT series.
What decoupling capacitance is recommended for the 74CBTLV3125PWRG4 VCC pin?
Texas Instruments recommends a 0.1 µF ceramic capacitor placed as close as possible to the VCC pin of the 74CBTLV3125PWRG4, with short, low-inductance traces to GND. For systems with multiple 74CBTLV3125PWRG4 devices or high-noise environments, adding a parallel 1 µF capacitor improves low-frequency supply stability without compromising high-frequency response.
74CBTLV3125PWRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74CBTLV
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Bus Switch
- Circuit:
- 1 x 1:1
- Independent Circuits:
- 4
- 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:
- 14-TSSOP
74CBTLV3125PWRG4 FAQ
1.How can I place an order for 74CBTLV3125PWRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74CBTLV3125PWRG4 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 74CBTLV3125PWRG4 reliable?
The price and inventory of 74CBTLV3125PWRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74CBTLV3125PWRG4 is usually 5 days.
3.What payment methods are accepted for 74CBTLV3125PWRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74CBTLV3125PWRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74CBTLV3125PWRG4?
74CBTLV3125PWRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74CBTLV3125PWRG4 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 74CBTLV3125PWRG4?
For technical support, including 74CBTLV3125PWRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74CBTLV3125PWRG4 requirements.
6.How does Aetrix verify that 74CBTLV3125PWRG4 is sourced from the original manufacturer or authorized distributors?
All 74CBTLV3125PWRG4 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 74CBTLV3125PWRG4 meets industry standards.
7.What is the process for return or replacement of 74CBTLV3125PWRG4?
All 74CBTLV3125PWRG4 units undergo pre-shipment inspection (PSI). If there is an issue with 74CBTLV3125PWRG4, 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 74CBTLV3125PWRG4 part is unused and in its original packaging.
Return procedure for 74CBTLV3125PWRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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