Overview
The SN74CB3Q3257PWRG4, produced by Texas Instruments, is a high-bandwidth FET bus switch designed for high-speed data transmission 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. It is organized as two 1-of-4 multiplexers/demultiplexers with separate output-enable inputs, allowing for bidirectional data flow between ports. The SN74CB3Q3257 is particularly suited for broadband communications, networking, and data-intensive computing systems due to its high-bandwidth data path and minimal propagation delay.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Temperature Range | -40 to 85 | °C |
| VCC Operating Range | 2.3 to 3.6 | V |
| High-Bandwidth Data Path | Up to 500 | MHz |
| ON-State Resistance (ron) | 4 | Ω (Typical) |
| Input/Output Capacitance (Cio(OFF)) | 3.5 | pF (Typical) |
| Propagation Delay (tpd) | 0.12 to 0.21 | ns |
| Switching Frequency (fOE) | Up to 20 | MHz |
| Power Consumption (ICC) | 0.7 | mA (Typical) |
| Package Type | 16-TSSOP |
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) characteristics over operating range
- Rail-to-rail switching on data I/O ports
- Bidirectional data flow with near-zero propagation delay
- Low input and output capacitance to minimize loading and signal distortion
- Fast switching frequency (fOE = 20 MHz maximum)
- Data and control inputs provide undershoot clamp diodes
- Low power consumption (ICC = 0.7 mA typical)
- Supports partial-power-down mode operation
- Latch-up performance exceeds 100 mA per JESD 78, Class II
- ESD performance tested per JESD 22 (2000-V Human Body Model, 1000-V Charged-Device Model)
Applications
The SN74CB3Q3257 is ideal for various high-speed applications, including:
- Broadband communications
- Networking
- Data-intensive computing systems
- USB interface
- Differential signal interface
- Bus isolation
- Low-distortion signal gating
Q & A
- What is the maximum operating temperature range of the SN74CB3Q3257?
The operating temperature range is -40°C to 85°C. - What is the typical ON-state resistance (ron) of the SN74CB3Q3257?
The typical ON-state resistance is 4 Ω. - What is the maximum switching frequency for the control inputs?
The maximum switching frequency is up to 20 MHz. - Does the SN74CB3Q3257 support 5V tolerant I/Os?
Yes, it supports 5V tolerant I/Os with the device powered up or powered down. - What is the typical power consumption of the SN74CB3Q3257?
The typical power consumption is 0.7 mA. - What type of package does the SN74CB3Q3257 come in?
The device comes in a 16-TSSOP package. - What are the key applications of the SN74CB3Q3257?
Key applications include broadband communications, networking, data-intensive computing systems, USB interface, differential signal interface, bus isolation, and low-distortion signal gating. - Does the SN74CB3Q3257 support bidirectional data flow?
Yes, it supports bidirectional data flow with near-zero propagation delay. - What is the input/output capacitance of the SN74CB3Q3257?
The typical input/output capacitance is 3.5 pF. - Is the SN74CB3Q3257 ESD protected?
Yes, it has ESD performance tested per JESD 22 (2000-V Human Body Model, 1000-V Charged-Device Model).
