1. Product Overview

️· Product: UT54BS3245 – An 8x1 Bus Switch Analog. This is a device that can selectively connect two sets of 8 signals (A and B) based on the control signal. It's specifically designed for analog signals, indicating a focus on signal integrity and low on-resistance.
️· Functionality: It allows routing of analog signals between two buses, essentially acting as a switch to direct the signals.

2. Key Features and Specifications

️· Analog Bus Switching: Designed for routing analog signals.
️· Temperature Range: (Varies based on ordering/screening - see ordering information)
- Standard: Potentially 25°C only (Prototype flow)
- HiRel: -55°C to +125°C
️· Radiation Tolerance: Some ordering options include radiation tolerance (e.g., 1E5 rads(Si) or 3E5 rads(Si)). However, radiation testing isn't guaranteed for all configurations.
️· Propagation Delay:
- tPD30 (A or B to B or A): ~500ps (VDD = 5.0V) and ~1ns (VDD = 3.3V)
- tPD15: ~650ps (VDD = 5.0V) and ~1.3ns (VDD = 3.3V)
️· Enable/Disable Times: tEN and tDIS are in the range of 1-8 nanoseconds.
️· Switch On Resistance (RON): Approximately 5-6 ohms (VDD = 3.0V) and < 10 ohms (VDD = 4.5V).
️· Isolation: -60dB at 1MHz.
️· Cross Talk: -60dB at 1MHz.

3. Electrical Characteristics (Important Values)

️· Supply Voltage: Not explicitly stated. However, different VDD values are specified for the AC characteristics (5.0V and 3.3V).
️· Input Voltage: Centered at VDD/2 for isolation and crosstalk measurements.
️· Output Current: +/- 30mA is specified as a condition for measuring propagation delay.

4. Ordering Information

️· Package Options:
- 20-lead Ceramic Flatpack (most common)
- SMD (Surface Mount Device) - 20-lead ceramic bottom-brazed Flatpack
️· Lead Finish:
- A (Solder Dip)
- C (Gold)
- X (Factory option - gold or solder)
️· Screening/Quality Level:
- Prototype flow (+25°C only)
- HiRel flow (-55°C to +125°C)
️· QML Classification
- Q (Class Q)
- V (Class V)

5. Mechanical Data

️· Figure 6 shows a 20-lead ceramic flatpack. Specific dimensions and weights are not provided, but would be in a separate mechanical drawing.

6. Figures and Diagrams

️· Figure 3: Output Test Load Circuit
️· Figure 4: Propagation Waveform
️· Figure 5: Propagation Waveform
️· Figure 6: 20-lead Ceramic Flatpack

CRUCIAL NOTES AND WARNINGS:

️· Advanced/Preliminary Datasheet: This is *not* a final, production datasheet. Specifications may change. This is for product development and evaluation purposes.
️· Controlled Export: This product is subject to U.S. Export Control regulations. An export license may be required.
️· Radiation Guarantee: Radiation tolerance is *not* guaranteed for all configurations. Check specific ordering information.
️· Temperature Range: The operating temperature range is highly dependent on the selected screening/quality level.
️· Lack of Specific Details: Several key details, such as supply voltage and precise mechanical dimensions, are not provided in this datasheet.
️· Datasheet Definition: The "Advanced Datasheet - Product In Development" notation and the "Datasheet Definition" section at the end indicate this is a work-in-progress.



This summary should give you a good overview of the UT54BS3245. However, always refer to the official, final datasheet from Aeroflex (now part of Microchip Technology) for the most accurate and up-to-date information before using this product in any application. You can likely find the latest version on the Microchip website.