Overview
The SN74CB3Q3257PWG4, produced by Texas Instruments, is a high-bandwidth FET bus switch designed to elevate the gate voltage of the pass transistor using a charge pump. This device provides a low and flat ON-state resistance (ron), enabling minimal propagation delay and supporting rail-to-rail switching on the data input/output (I/O) ports. It is organized as two 1-of-4 multiplexers/demultiplexers with separate output-enable inputs, making it ideal for high-bandwidth applications in broadband communications, networking, and data-intensive computing systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Voltage Range | 2.3V to 3.6V | V |
| Data I/O Voltage Range | 0 to 5V | V |
| ON-state Resistance (ron) | 4Ω (Typical) | Ω |
| Bandwidth | Up to 500 MHz | MHz |
| Input/Output Capacitance (Cio(OFF)) | 3.5 pF (Typical) | pF |
| ESD Performance | 2000V Human Body Model, 1000V Charged-Device Model | V |
| Package Types | TSSOP (PW), TVSOP (DGV), SSOP (DBQ), VQFN (RGV) | - |
| Thermal Resistance (RθJA) | 112.7 °C/W (TSSOP) | °C/W |
Key Features
- High-bandwidth data path up to 500 MHz
- 5V tolerant I/Os with device powered up or powered down
- Low and flat ON-state resistance (ron)
- Rail-to-rail switching on data I/O ports
- Bidirectional data flow with near-zero propagation delay
- Low data I/O capacitance to minimize capacitive loading and signal distortion
- Ioff supports partial-power-down mode operation
- Latch-up performance exceeds 100 mA per JESD 78, Class II
- ESD performance tested per JESD 22
- Supports both digital and analog applications: USB interface, differential signal interface, bus isolation, low-distortion signal gating
Applications
- IP Phones: wired and wireless
- Optical modules
- Optical networking: video over fiber and EPON
- Private branch exchange (PBX)
- WiMAX and wireless infrastructure equipment
Q & A
- What is the SN74CB3Q3257PWG4 used for?
The SN74CB3Q3257PWG4 is used as a high-bandwidth FET bus switch for multiplexing and demultiplexing data in high-speed applications.
- What is the operating voltage range of the SN74CB3Q3257PWG4?
The operating voltage range is from 2.3V to 3.6V.
- What is the maximum bandwidth supported by the SN74CB3Q3257PWG4?
The device supports up to 500 MHz bandwidth.
- What are the package options available for the SN74CB3Q3257PWG4?
The device is available in TSSOP (PW), TVSOP (DGV), SSOP (DBQ), and VQFN (RGV) packages.
- How does the SN74CB3Q3257PWG4 handle ESD?
The device has ESD performance tested per JESD 22, with 2000V Human Body Model and 1000V Charged-Device Model.
- What is the typical ON-state resistance (ron) of the SN74CB3Q3257PWG4?
The typical ON-state resistance (ron) is 4Ω.
- Can the SN74CB3Q3257PWG4 be used in partial-power-down applications?
- What types of applications does the SN74CB3Q3257PWG4 support?
The device supports both digital and analog applications, including USB interfaces, differential signal interfaces, bus isolation, and low-distortion signal gating.
- How is the data flow controlled in the SN74CB3Q3257PWG4?
The data flow is controlled by the select (S0, S1) inputs and the output-enable (OE) inputs.
- What is the thermal resistance (RθJA) of the TSSOP package?
The thermal resistance (RθJA) for the TSSOP package is 112.7 °C/W.
