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Nexperia USA Inc. CBT3306GT,115
- Part No.:
- CBT3306GT,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 8-XFDFN
- Datasheet:
-
CBT3306GT,115.pdf
- Description:
- IC BUS SW 1 X 1:1 8XSON/SOT8331
- Quantity:
- Payment:
- Shipping:
Inventory:1,559
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Product details
Overview
CBT3306GT,115 from Nexperia is a dual FET bus switch IC with independent 1A↔1B and 2A↔2B bidirectional signal paths, 5 Ω typical ON resistance at 4.5 V, TTL-level compatible control inputs, and overvoltage-tolerant nOE pins up to 5.5 V - used for low-latency data routing in 3.3 V/5 V mixed-signal interface logic.
For engineers reviewing the CBT3306GT,115 datasheet, CBT3306GT,115 pinout, CBT3306GT,115 application, or CBT3306GT,115 equivalent, key selection criteria include bidirectional switching latency (≤5 ns enable/disable), IOFF partial power-down capability, ±1 μA input leakage, 8-terminal XSON8 package footprint, and compatibility with 5 V-tolerant control in 3.3 V systems.
Technical Context
This device implements two independent transmission-gate-based FET switches, each controlled by a dedicated active-low output enable (nOE) input. Switch conduction is bidirectional with no inherent directionality - signal flow depends solely on external voltage differentials between A and B ports.
It features IOFF circuitry that disables both switch paths when VCC = 0 V, preventing current backflow and enabling live insertion. Control inputs tolerate up to 5.5 V regardless of VCC level, allowing direct interfacing with 5 V logic while operating from 4.5–5.5 V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ON Resistance | 5 Ω max at VCC = 4.5 V, II = 64 mA - ensures minimal voltage drop and signal distortion in high-speed digital buses. |
| Enable/Disable Time | 1.0–5.0 ns - enables sub-5 ns switching for timing-critical address/data multiplexing. |
| Supply Voltage Range | 4.5–5.5 V - matches standard 5 V TTL and LVTTL system rails with tight regulation tolerance. |
| Input Leakage Current | ±1 μA max at VCC = 5.5 V - reduces loading on upstream drivers and preserves signal integrity in fan-out scenarios. |
| IOFF Protection | Active at VCC = 0 V - prevents back-powering of powered-down subsystems during hot-swap or partial power-down. |
| ESD Robustness | HBM >2000 V, CDM >1000 V - supports handling in non-ESD-controlled assembly environments without additional protection. |
| Operating Temperature | −40 °C to +85 °C - validated for industrial-grade embedded control and communications equipment. |
Pinout & Package
XSON8 plastic extremely thin small outline package (SOT833-1); 8-terminal no-lead surface-mount package; body dimensions 1.0 × 1.95 × 0.5 mm; thermal pad exposed on underside for enhanced heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | 2B | B-port terminal for second switch - bidirectionally connected to 2A when 2OE = LOW. |
| 2 | 2OE | Active-low enable for second switch - HIGH forces 2A↔2B into high-impedance OFF state. |
| 3 | VCC | Positive supply rail - powers internal FET gates and level-shifting circuitry; must be decoupled locally. |
| 4 | 2A | A-port terminal for second switch - bidirectionally connected to 2B when 2OE = LOW. |
| 5 | 1B | B-port terminal for first switch - bidirectionally connected to 1A when 1OE = LOW. |
| 6 | 1A | A-port terminal for first switch - bidirectionally connected to 1B when 1OE = LOW. |
| 7 | 1OE | Active-low enable for first switch - HIGH forces 1A↔1B into high-impedance OFF state. |
| 8 | GND | Ground reference - return path for supply current and signal common; connects to thermal pad. |
Key Features
| Feature | Design Value |
|---|---|
| 5 Ω low-ON-resistance switching | Minimizes propagation delay skew and voltage drop across A↔B paths in 50–100 MHz data buses. |
| TTL-compatible control inputs | VIH ≥ 2.0 V and VIL ≤ 0.8 V allow direct connection to legacy 5 V TTL outputs without level shifters. |
| Overvoltage-tolerant nOE pins | Withstand up to 5.5 V regardless of VCC - enables safe use in mixed-voltage systems where control logic runs at 5 V but VCC = 3.3 V. |
| IOFF partial power-down mode | Blocks current flow between A/B ports when VCC = 0 V - essential for hot-plug I/O expansion and modular backplane designs. |
| Latch-up immunity >100 mA | Complies with JESD78B Class II - ensures robust operation under transient fault conditions in industrial environments. |
Applications
| PCI Express Slot Multiplexer | Legacy ISA Bus Isolation |
|---|---|
|
Use Scenario: Routing PCIe configuration signals between primary and secondary root complexes in modular server backplanes. IC Role / Device Role / Timing Role: Bidirectional signal switch enabling dynamic reconfiguration of SMBus, CLKREQ#, and PERST# lines without protocol interruption. Use Value: Sub-5 ns enable/disable time prevents timing violations during hot-reconfiguration; IOFF prevents backfeed when one complex powers down. |
Use Scenario: Isolating ISA bus peripherals (e.g., legacy DAQ cards) from main CPU bus during firmware updates. IC Role / Device Role / Timing Role: Dual-channel bus gate controlling address/data strobes (A0–A19, D0–D15) and control signals (IOR#, IOW#). Use Value: 5 Ω ON resistance maintains signal edge integrity at 8 MHz ISA clock rates; TTL compatibility eliminates level-shifter components. |
| USB 2.0 OTG Data Line Switching | Industrial CAN Transceiver Interface Buffer |
|
Use Scenario: Selecting between host and peripheral USB D+/D− lines in dual-role OTG devices using ID pin detection. IC Role / Device Role / Timing Role: Dual bidirectional switch toggling D+ and D− paths based on ID pin state, with minimal capacitance (<6.5 pF off-state). Use Value: 6.45 pF off-state capacitance limits signal degradation; 0.25 ns propagation delay preserves USB 2.0 full-speed eye diagram margins. |
Use Scenario: Isolating CAN controller GPIOs (TXD/RXD) from transceiver side during ESD events or power cycling. IC Role / Device Role / Timing Role: Signal gate placed between microcontroller UART pins and CAN transceiver inputs/outputs to enforce directional isolation. Use Value: HBM >2000 V ESD rating protects sensitive MCU pins; IOFF blocks transceiver-side faults from propagating to controller during brownout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBT3306CPWRE4 | Higher typical ON resistance (7 Ω), TSSOP8 only, no XSON8 option; identical 5 V tolerant control. | Requires larger PCB area; lacks thermal pad for high-density layouts. | Select when board space permits TSSOP8 and thermal performance is not limiting. |
| 74LVC2G66GW,125 | Single-channel only, lower VCC range (1.65–5.5 V), 10 Ω ON resistance, smaller XSON6 package. | Requires two units for dual-channel function; higher RON increases voltage drop at 100 mA loads. | Select for ultra-low-voltage (1.8 V) operation or when channel count can be distributed across two packages. |
Compared with SN74CBT3306CPWRE4 and 74LVC2G66GW,125, the CBT3306GT,115 uniquely combines dual-channel functionality, 5 Ω ON resistance, XSON8 footprint, and guaranteed 5.5 V overvoltage tolerance - making it optimal for space-constrained, mixed-voltage industrial bus isolation.
Availability
CBT3306GT,115 is available at Aetrix Electronics and suitable for PCI Express slot multiplexing, legacy ISA bus isolation, USB 2.0 OTG line switching, and industrial CAN transceiver buffering requiring stable component supply across extended temperature ranges.
Supply support for CBT3306GT,115 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
Nexperia is a global semiconductor expert focused on high-volume, high-reliability discrete and logic devices, with leadership in automotive, industrial, and mobile applications.
The CBT3306 belongs to Nexperia's high-speed bus switch product line, engineered specifically for low-latency, bidirectional signal routing in mixed-voltage digital systems where power efficiency and signal fidelity are critical.
FAQ
Can CBT3306GT,115 operate with VCC = 3.3 V?
No - the recommended operating VCC range is strictly 4.5 V to 5.5 V per Table 6. At 3.3 V, ON resistance exceeds 15 Ω and enable timing degrades beyond specification; the device is not characterized for sub-4.5 V operation and may fail to meet TTL input thresholds or switching performance.
What is the maximum capacitive load the CBT3306GT,115 can drive reliably?
The device is characterized with 50 pF load capacitance in dynamic testing (Table 10), and off-state I/O capacitance is 6.45 pF. For reliable signal integrity, total node capacitance (including PCB trace and downstream inputs) should remain ≤75 pF to maintain sub-5 ns enable/disable times and preserve rise/fall times below 2.5 ns.
Does CBT3306GT,115 support hot-swap without external protection?
Yes - its IOFF circuitry actively blocks current flow between A and B ports when VCC = 0 V, and overvoltage-tolerant nOE pins withstand up to 5.5 V during insertion. However, external series resistors (10–22 Ω) are still recommended on A/B lines to limit inrush current during plug-in transients.
How does the CBT3306GT,115 handle unequal voltage levels on A and B ports?
It conducts bidirectionally based on the voltage differential: when enabled, current flows from higher- to lower-potential port through the FET channel. The 5 Ω RON ensures minimal drop, but sustained reverse bias beyond VCC + 0.3 V risks forward-biasing internal protection diodes - keep |VA − VB| < VCC + 0.3 V for long-term reliability.
CBT3306GT,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74CBT
- Package/Case:
- 8-XFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Bus Switch
- Circuit:
- 1 x 1:1
- Independent Circuits:
- 2
- Current - Output High, Low:
- -
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-XSON, SOT833-1 (1.95x1)
CBT3306GT,115 FAQ
1.How can I place an order for CBT3306GT,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for CBT3306GT,115 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 CBT3306GT,115 reliable?
The price and inventory of CBT3306GT,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CBT3306GT,115 is usually 5 days.
3.What payment methods are accepted for CBT3306GT,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CBT3306GT,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CBT3306GT,115?
CBT3306GT,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CBT3306GT,115 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 CBT3306GT,115?
For technical support, including CBT3306GT,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CBT3306GT,115 requirements.
6.How does Aetrix verify that CBT3306GT,115 is sourced from the original manufacturer or authorized distributors?
All CBT3306GT,115 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 CBT3306GT,115 meets industry standards.
7.What is the process for return or replacement of CBT3306GT,115?
All CBT3306GT,115 units undergo pre-shipment inspection (PSI). If there is an issue with CBT3306GT,115, 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 CBT3306GT,115 part is unused and in its original packaging.
Return procedure for CBT3306GT,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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