Overview
The SN74CB3Q3257PWR, produced by Texas Instruments, is a high-bandwidth FET bus switch designed for multiplexing and demultiplexing applications. This device utilizes a charge pump to elevate the gate voltage of the pass transistor, resulting in a low and flat ON-state resistance (ron). This characteristic allows for minimal propagation delay and supports rail-to-rail switching on the data input/output (I/O) ports, making it ideal for high-bandwidth applications in broadband communications, networking, and data-intensive computing systems.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| High-bandwidth data path | Up to 500 MHz | ||
| ON-state resistance (ron) | 4 Ω (Typical) | Over operating range | |
| VCC Operating range | 2.3V to 3.6V | ||
| Data I/O signaling levels | 0- to 5V (0.8V, 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, 5V) | ||
| Propagation delay (tpd) | 0.12 ns to 0.21 ns | Depending on temperature and load | |
| Switching frequency (f OE) | Up to 20 MHz | ||
| Input/output capacitance (Cio(OFF)) | 3.5 pF (Typical) | ||
| Power consumption (ICC) | 0.6 mA (Typical) | ||
| ESD Performance | 2000V Human body model, 1000V Charged-device model | Per JESD 22 | |
| Package | TSSOP (PW), 16 pins | ||
| Operating temperature range | -40°C to 85°C |
Key Features
- High-bandwidth data path up to 500 MHz
- 5V Tolerant I/Os with the device powered up or powered down
- Low and flat ON-state resistance (ron) characteristics over operating range
- Rail-to-rail switching on data I/O ports for 0- to 5V and 0- to 3.3V switching
- Bidirectional data flow with near-zero propagation delay
- Low input and output capacitance minimizes loading and signal distortion
- Fast switching frequency (f OE = 20MHz maximum)
- Data and control inputs provide undershoot clamp diodes
- Low power consumption (ICC = 0.6mA Typical)
- Supports partial-power-down mode operation
- Latch-up performance exceeds 100mA Per JESD 78, class II
- ESD Performance tested per JESD 22
Applications
- IP Phones: wired and wireless
- Optical modules
- Optical networking: video over fiber and EPON
- Private branch exchange (PBX)
- WiMAX and wireless infrastructure equipment
- USB interface, differential signal interface, bus isolation, low-distortion signal gating
Q & A
- What is the maximum bandwidth of the SN74CB3Q3257PWR?
The SN74CB3Q3257PWR has a high-bandwidth data path up to 500 MHz.
- What are the operating voltage ranges for the SN74CB3Q3257PWR?
The device operates with a VCC range from 2.3V to 3.6V.
- What is the typical ON-state resistance (ron) of the SN74CB3Q3257PWR?
The typical ON-state resistance (ron) is 4 Ω.
- Does the SN74CB3Q3257PWR support bidirectional data flow?
- What is the maximum switching frequency for the control inputs?
The maximum switching frequency for the control inputs is up to 20 MHz.
- What are the ESD performance specifications of the SN74CB3Q3257PWR?
The device has ESD performance tested per JESD 22: 2000V Human body model and 1000V Charged-device model.
- What types of applications is the SN74CB3Q3257PWR suited for?
The device is suited for broadband communications, networking, data-intensive computing systems, IP phones, optical modules, and more.
- What is the typical power consumption of the SN74CB3Q3257PWR?
The typical power consumption (ICC) is 0.6 mA.
- Does the SN74CB3Q3257PWR support partial-power-down mode operation?
- What is the operating temperature range of the SN74CB3Q3257PWR?
The operating temperature range is -40°C to 85°C.
