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Nexperia USA Inc. CBT3306GM,125
- Part No.:
- CBT3306GM,125
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 8-XFQFN Exposed Pad
- Datasheet:
-
CBT3306GM,125.pdf
- Description:
- IC BUS SWITCH 1 X 1:1 8XQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,570
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Product details
Overview
CBT3306GM,125 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-compatible control inputs tolerant to 5.5 V, and IOFF partial power-down capability - used in level-shifting data buses between 3.3 V and 5 V microcontrollers and peripherals.
For engineers reviewing the CBT3306GM,125 datasheet, CBT3306GM,125 pinout, CBT3306GM,125 application, or CBT3306GM,125 equivalent, key selection criteria include bidirectional low-RON switching, overvoltage-tolerant OE pins, guaranteed operation from -40 °C to +85 °C, and compatibility with TSSOP8 (SOT530-1) PCB footprints.
Technical Context
The CBT3306GM,125 implements two independent transmission-gate-based FET switches, each controlled by a dedicated active-low output enable (1OE/2OE) input. Switch conduction occurs only when the respective OE is LOW, placing the A–B path in low-impedance mode; HIGH on OE forces the port into high-impedance OFF-state (Z).
Its IOFF circuitry ensures negligible current flow between A and B ports when VCC = 0 V, enabling live insertion and hot-swap support. Input clamping and ESD protection (HBM >2000 V, CDM >1000 V) are integrated per JESD22 standards, supporting robust board-level reliability in mixed-voltage systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ON Resistance | 5 Ω max at VCC = 4.5 V, II = 64 mA - enables <100 mV voltage drop under 20 mA signal current, preserving logic margins. |
| Supply Voltage Range | 4.5 V to 5.5 V - matches standard 5 V TTL and mixed 3.3/5 V system rails without external regulation. |
| Input Voltage Tolerance | Up to 5.5 V on OE pins - allows direct interfacing with 5 V controllers even when VCC = 3.3 V (not supported here), but confirmed for 5 V systems. |
| Propagation Delay | 0.25 ns typical (nA↔nB) - supports >1 GHz signal switching with minimal timing skew in high-speed digital buses. |
| IOFF Leakage | ±1 μA max at VCC = 5.5 V - prevents back-driving and signal contention during power sequencing or standby. |
| Operating Temperature | -40 °C to +85 °C - qualified for industrial-grade embedded control, instrumentation, and communications equipment. |
| ESD Robustness | HBM >2000 V, CDM >1000 V - exceeds JEDEC requirements for handling and assembly in automated SMT lines. |
Pinout & Package
CBT3306GM,125 is packaged in XQFN8 (SOT902-2), an 8-terminal, leadless plastic package measuring 1.6 × 2.1 × 0.5 mm with wettable flanks, optimized for space-constrained PCBs and automated optical inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE | Active-low enable for Channel 1 | Drives 1A–1B path ON when LOW; disables to high-Z when HIGH - enables independent channel gating. |
| 1A / 1B | Bidirectional signal terminals (Channel 1) | Pass signals in either direction with <5 Ω RON; no internal directionality - ideal for data bus isolation. |
| 2OE | Active-low enable for Channel 2 | Independent control of second switch; allows time-multiplexed or parallel bus segmentation. |
| 2A / 2B | Bidirectional signal terminals (Channel 2) | Electrically identical to 1A/1B; supports dual-bus architectures like I²C multiplexing or address/data separation. |
| GND | Ground reference (0 V) | Return path for all internal FET sources and ESD clamps; must be low-inductance connection for noise immunity. |
| VCC | Positive supply (4.5–5.5 V) | Power rail for internal level shifters and gate drivers; bypassing with 100 nF ceramic near pin is mandatory. |
Key Features
| Feature | Design Value |
|---|---|
| 5 Ω low-impedance switch path | Minimizes signal attenuation and timing distortion in 5 V digital buses up to 100 MHz. |
| IOFF partial power-down | Prevents current flow between A/B ports when VCC = 0 V - essential for hot-plug and power-gated subsystems. |
| TTL-compatible control inputs | 1OE/2OE accept 0.8 V (max) VIH and 2.0 V (min) VIL thresholds - directly driven by legacy 5 V logic without level shifters. |
| Overvoltage-tolerant OE pins | Withstand up to 5.5 V regardless of VCC - simplifies interface to higher-voltage supervisors or GPIOs. |
| Latch-up immunity >100 mA | Complies with JESD78B Class II - eliminates risk of destructive latch-up in noisy industrial environments. |
Applications
| PCI Express Slot Multiplexer | I²C Bus Isolation |
|---|---|
|
Use Scenario: Routing PCIe clock and sideband signals between host CPU and multiple add-in cards using shared physical slots. IC Role / Device Role / Timing Role: Dual-channel bidirectional switch isolating PERST# and CLKREQ# lines during card enumeration while maintaining signal integrity. Use Value: 5 Ω RON and 0.25 ns propagation delay prevent setup/hold violations and jitter accumulation across hot-plug events. |
Use Scenario: Preventing address conflicts when connecting multiple I²C sensors with duplicate addresses to a single controller. IC Role / Device Role / Timing Role: Channel-selectable bus switch enabling time-division access to isolated sensor sub-buses. Use Value: IOFF protection blocks cross-talk during power cycling of sensor groups; TTL-compatible OE allows direct MCU GPIO control. |
| Legacy Parallel Port Interface | Microcontroller GPIO Expansion |
|
Use Scenario: Adapting modern 3.3 V microcontrollers to legacy 5 V parallel printer or display interfaces. IC Role / Device Role / Timing Role: Bidirectional level-translating switch for DATA[7:0], BUSY, and STROBE lines without direction pins. Use Value: 5 V-tolerant OE and 5 Ω RON preserve rise/fall times and noise margins across full 5 V swing signals. |
Use Scenario: Expanding GPIO count on resource-constrained MCUs by sharing data/address lines across multiple peripheral ICs. IC Role / Device Role / Timing Role: Dual-channel switch enabling time-multiplexed access to SPI flash, EEPROM, and ADC devices on common bus wires. Use Value: Independent 1OE/2OE control permits deterministic arbitration; -40 °C to +85 °C rating supports industrial edge node deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBT3306PWR | Same 5 Ω RON, but uses TSSOP8 (SOT530-1); higher ICC (10 μA vs 3 μA); no IOFF spec in datasheet. | Requires larger PCB footprint; less suitable for power-sensitive or hot-swap designs due to missing IOFF. | Select if TSSOP8 is preferred for reworkability or existing footprint reuse; verify power sequencing without IOFF. |
| 74LVC2G66DP | Higher RON (12 Ω typ), 1.65–5.5 V VCC range, no overvoltage-tolerant OE (VI max = VCC + 0.3 V). | Supports 3.3 V–5 V mixed-rail systems but cannot tolerate 5 V OE drive with 3.3 V VCC - requires level shifters. | Choose only for lower-voltage systems where 12 Ω RON is acceptable and OE voltage matching is guaranteed. |
Compared with SN74CBT3306PWR and 74LVC2G66DP, CBT3306GM,125 uniquely combines 5 V-tolerant OE, IOFF, and XQFN8 compactness - making it optimal for space-constrained, hot-pluggable 5 V bus isolation where leakage and layout density are critical.
Availability
CBT3306GM,125 is available at Aetrix Electronics and suitable for industrial control panels, test equipment interfaces, and embedded communication modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for CBT3306GM,125 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 delivering high-performance analog, logic, and discrete components with focus on efficiency, reliability, and miniaturization for automotive, industrial, and consumer markets.
CBT3306GM,125 belongs to Nexperia's legacy logic bus switch family, engineered specifically for low-latency, bidirectional signal routing in 5 V digital systems - emphasizing robustness, ease of integration, and compatibility with standard TTL design practices.
FAQ
What is the maximum capacitive load the CBT3306GM,125 can drive while maintaining specified propagation delay?
The datasheet specifies tpd ≤ 0.25 ns with CL = 50 pF and RL = 500 Ω. Driving loads beyond 50 pF increases RC delay proportionally; for 100 pF, expect ~0.5 ns typical delay. Layout parasitics must be minimized - keep traces short and avoid stubs to stay within timing budgets.
Can CBT3306GM,125 be used with VCC = 3.3 V?
No - the recommended operating conditions specify VCC = 4.5 V to 5.5 V only. At 3.3 V, RON rises significantly (>15 Ω), VIH/VIL thresholds become unreliable, and IOFF behavior is not characterized. Use 74LVC2G66 or similar for 3.3 V operation.
Is the XQFN8 (SOT902-2) package of CBT3306GM,125 compatible with standard reflow profiles?
Yes - SOT902-2 is a standard IPC-7095-compliant XQFN package. It supports JEDEC J-STD-020D peak reflow temperatures up to 260 °C for ≤ 30 seconds. Ensure solder paste volume and thermal profile match the 0.5 mm height and wettable flank geometry for void-free joints.
Does CBT3306GM,125 support hot-swap insertion when VCC is unpowered?
Yes - its IOFF circuitry guarantees that leakage current between A and B ports remains ≤ ±1 μA when VCC = 0 V, preventing back-powering or signal corruption during live insertion. This is validated per JESD78B latch-up testing and explicitly stated in Section 2 of the datasheet.
CBT3306GM,125 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74CBT
- Package/Case:
- 8-XFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-XQFN (1.6x1.6)
CBT3306GM,125 FAQ
1.How can I place an order for CBT3306GM,125 through Aetrix?
Please submit a Request for Quotation (RFQ) for CBT3306GM,125 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 CBT3306GM,125 reliable?
The price and inventory of CBT3306GM,125 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CBT3306GM,125 is usually 5 days.
3.What payment methods are accepted for CBT3306GM,125?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CBT3306GM,125 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CBT3306GM,125?
CBT3306GM,125 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CBT3306GM,125 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 CBT3306GM,125?
For technical support, including CBT3306GM,125 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CBT3306GM,125 requirements.
6.How does Aetrix verify that CBT3306GM,125 is sourced from the original manufacturer or authorized distributors?
All CBT3306GM,125 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 CBT3306GM,125 meets industry standards.
7.What is the process for return or replacement of CBT3306GM,125?
All CBT3306GM,125 units undergo pre-shipment inspection (PSI). If there is an issue with CBT3306GM,125, 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 CBT3306GM,125 part is unused and in its original packaging.
Return procedure for CBT3306GM,125:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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