LSF0204DYZPR Integrated Circuits (ICs)

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The LSF0204DYZPR is a kind of Translators and Level Adjuster leveraged by the CMOS process. It works greatly in translating signals between different logic families, such as TTL to LVTTL. It has four channels, as each channel integrates two differential receivers and three differential drivers.

Principally, the LSF0204DYZPR comes from the logic-level shifting series of Maxim IntegratedProducts. It basically accomplishes two functions. One is for the voltage translation, where you can reach this purpose through the combination of the receiver and driver. The other is to separate the different logic families. By leveraging the limited power budget, it processes the information in the safest way.

Application Area

The LSF0204DYZPR products are particularly designed to solve level shifting and signal recovering issues, which frequently happen in different logic families. For instance, interfacing 3.3V devices with 5V ones or other in-between logic families. Additionally, it could be used in the communication area, namely, squeezing down the increasing power consumption due to the communication between various parts efficiently.

Features

The LSF0204DYZPR comes with high effective performance and some featured advantages as below.

• It is powered by the CMOS process and driven by 5V~3.3V.
• It holds an impressive input voltage range of 0.8V to 3.6V.
• It offers excellent matching between receivers and drivers with only +/- 200mV mismatches in the input/output signals.
• It enables the different logic signals to directly interact. The translation of signals from TTL to LVTTL to HSTL is easy.
• It can automate the level shifting, helping with the design of power supply system and saving the additional resource.

Working Principle

The following diagram demonstrates the inner structure and working principle overview of LSF0204DYZPR.

Generally, the circuit of this chip is separates into four independent channels. In each channel, there are a high-speed differential pair receiver and three low-voltage differential driver. Bringing external supply Vin in, the +/-voltage signal is transferred to both receiver and driver in the same voltage level. The receiver is then translated and transfers the signal to the driver side. And the driver will convert the signal back to the external voltage level.

Checking the below circuit, you will find the RXIN voltage control the threshold voltage. Thus, the signal under the threshold voltage of varying voltage level RVCC is the same in both receiver side and driver side.

What’s more, LSF0204DYZPR has a programmable RXLV1/RXLV0 limits the minimum threshold voltage on the receiver side. Its large gain usually ranges from -2V to 6V. This could suppress the voltage level mismatch and meet the requirements of different ISO standards, such as TTL and LVTTL.

Conclusion

To conclude, LSF0204DYZPR is an ideal translator and level shifter for changing between different levels of logic families, especially for the communication area. Its channelized design greatly simplifies the design process and substantially decreases the power consumption.

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