Overview
The SN74CBT3253CDRG4, produced by Texas Instruments, is a dual 1-of-4 high-speed TTL-compatible FET multiplexer/demultiplexer. This component is designed to provide low ON-state resistance, enabling minimal propagation delay and efficient data transfer. It is part of the SN74CBT3253 series, which is functionally identical to industry-standard '3253 functions. The device features bidirectional data flow and includes undershoot protection for off-isolation on A and B ports up to –2 V, ensuring reliable operation in various signal environments.
Key Specifications
| Parameter | Min | Typical | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC) | 4 | - | 5.5 | V |
| Operating Free-Air Temperature (TA) | −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 |
Key Features
- Bidirectional data flow with near-zero propagation delay.
- Low ON-state resistance (ron = 3 Ω typical) for minimal signal distortion.
- Undershoot protection for off-isolation on A and B ports up to –2 V.
- Low input/output capacitance (Cio(OFF) = 5.5 pF typical) to minimize loading and signal distortion.
- Data and control inputs provide undershoot clamp diodes.
- Low power consumption (ICC = 3 μA max).
- Supports 0 to 5-V signaling levels and 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.
- ESD performance tested per JESD 22 – 2000-V Human-Body Model and 1000-V Charged-Device Model.
Applications
- USB interface and bus isolation.
- Low-distortion signal gating.
- I2C bus expansion.
- Both digital and analog applications where high-speed switching and low signal distortion are required.
Q & A
- What is the primary function of the SN74CBT3253CDRG4?
The SN74CBT3253CDRG4 is a dual 1-of-4 high-speed TTL-compatible FET multiplexer/demultiplexer.
- What is the operating voltage range for the SN74CBT3253CDRG4?
The operating voltage range is from 4 V to 5.5 V.
- What is the typical ON-state resistance of the SN74CBT3253CDRG4?
The typical ON-state resistance is 3 Ω.
- Does the SN74CBT3253CDRG4 have undershoot protection?
Yes, it has undershoot protection for off-isolation on A and B ports up to –2 V.
- What is the maximum power consumption of the SN74CBT3253CDRG4?
The maximum power consumption is 3 μA.
- 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 are some common applications of the SN74CBT3253CDRG4?
Common applications include USB interface, bus isolation, low-distortion signal gating, and I2C bus expansion.
- Does the SN74CBT3253CDRG4 support partial-power-down mode operation?
Yes, it supports partial-power-down mode operation through the Ioff feature.
- What are the ESD performance specifications of the SN74CBT3253CDRG4?
The ESD performance is tested per JESD 22 – 2000-V Human-Body Model and 1000-V Charged-Device Model.
- What is the operating temperature range of the SN74CBT3253CDRG4?
The operating temperature range is from –40°C to 85°C.
