Overview
The SN74CBT3253CDRE4, produced by Texas Instruments, is a dual 1-of-4 high-speed TTL-compatible FET multiplexer/demultiplexer. This device is designed to provide low ON-state resistance and near-zero propagation delay, making it suitable for applications requiring high-speed data transfer with minimal signal distortion. The SN74CBT3253CDRE4 is functionally identical to the industry-standard '3253 function and features active undershoot-protection circuitry to ensure proper operation even during undershoot events up to –2 V on the A and B ports.
Key Specifications
| Parameter | Min | Typical | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC) | 4 | 5.5 | V | |
| Operating Temperature Range | –40 | 85 | °C | |
| High-Level Control Input Voltage (VIH) | 2 | V | ||
| Low-Level Control Input Voltage (VIL) | 0.8 | V | ||
| ON-State Resistance (ron) | 3 | Ω | ||
| Input/Output Capacitance (Cio(OFF)) | 5.5 | pF | ||
| Power Consumption (ICC) | 3 | µA | ||
| ESD Performance (Human-Body Model) | 2000 | V | ||
| ESD Performance (Charged-Device Model) | 1000 | V |
Key Features
- Bidirectional data flow with near-zero propagation delay
- Low ON-state resistance (ron = 3 Ω typical)
- Low input/output capacitance minimizes loading and signal distortion (Cio(OFF) = 5.5 pF typical)
- Data and control inputs provide undershoot clamp diodes
- Low power consumption (ICC = 3 µA max)
- VCC operating range from 4 V to 5.5 V
- Data I/Os support 0 to 5-V signaling levels (0.8 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.3 V, 5 V)
- Control inputs can be driven by TTL or 5-V/3.3-V CMOS outputs
- Ioff supports partial-power-down mode operation
- Latch-up performance exceeds 100 mA per JESD 78, Class II
- Supports I2C bus expansion and both digital and analog applications
Applications
The SN74CBT3253CDRE4 is versatile and can be used in various applications, including:
- USB interface and bus isolation
- Low-distortion signal gating
- I2C bus expansion
- Digital and analog signal switching
- High-speed data transfer in communication systems
Q & A
- What is the primary function of the SN74CBT3253CDRE4?
The SN74CBT3253CDRE4 is a dual 1-of-4 high-speed TTL-compatible FET multiplexer/demultiplexer. - What is the operating temperature range of the SN74CBT3253CDRE4?
The operating temperature range is from –40°C to 85°C. - What is the typical ON-state resistance of the SN74CBT3253CDRE4?
The typical ON-state resistance (ron) is 3 Ω. - Does the SN74CBT3253CDRE4 support partial-power-down mode operation?
Yes, it supports partial-power-down mode operation through the Ioff feature. - What are the ESD performance ratings of the SN74CBT3253CDRE4?
The device has ESD performance tested per JESD 22 – 2000-V Human-Body Model and 1000-V Charged-Device Model. - Can the control inputs be driven by CMOS outputs?
Yes, the control inputs can be driven by TTL or 5-V/3.3-V CMOS outputs. - What is the power consumption of the SN74CBT3253CDRE4?
The maximum power consumption (ICC) is 3 µA. - Does the SN74CBT3253CDRE4 support I2C bus expansion?
Yes, it supports I2C bus expansion. - What types of applications can the SN74CBT3253CDRE4 be used in?
The device can be used in USB interface, bus isolation, low-distortion signal gating, and both digital and analog applications. - How does the undershoot protection work on the SN74CBT3253CDRE4?
The device features active undershoot-protection circuitry that senses undershoot events up to –2 V and ensures the switch remains in the proper OFF state.
