This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
Tool/software:
Hi
In the previous product, the following was used:
SN74LV244APWR, 5V -> 3.3V Level shift
SN74AHCT244PWR, 3.3V -> 5V Level shift
But the new case is expected to use 5V -> 1.8V & 1.8V -> 5V Level shift,
Could you help me suggest suitable part?
Use level shifters with two supplies, e.g., TXU0204. How many channels in each direction do you need?
Hello
The team is currently on Thanksgiving holidays. Pls expect response delay till Dec-2nd. Thank you for your patience.
BR
-Yuan
No; most buffered lever shifters are implemented as transceivers and need the additional DIR pin. Unidirectional shifters like the TXU0104 do not exist with eight channels.
Hello Gareth,
I agree with Clemens, the SN74LXC8T245 would be the best option here. We don't have 8-ch unidirectional level shifters so +20pin TSSOP package don't exist.
Regards,
Josh
Hi
TXS0108E
1. Are you sure TXS0108E can operate from 1.8 to 5V?
2. The Simplified application Vccb output in SPEC is 3.3V, and the System controller is also connected to 3.3V. Is it OK if it is connected to 5V? If it can be connected to 5V, then VCCA should be connected to 1.8V, VCCB should be connected to 5V, and OE should be connected to GEN. In this way, can the 1.8V to 5V (A to B) Level shift be achieved normally?
3. Please provide the TXS0108E reference schematic
SN74LXC8T245:
1. VCCA is connected to 1.8V, VCCB is connected to 5V, and OE/DIR are connected to GND. Is it possible to achieve 5V to 1.8V (B to A) Level shift normally?
2. Please provide the SN74LXC8T245 reference schematic
Hello Gareth,
TXS0108E:
1. Yes. Please take look at the recommended conditions on the datasheet.
2. The simplified application shows a typical use case. The device can work at VCCA = 1.8V and VCCB = 5V
3. We have an evaluation board you can take a look at, TXS-EVM
SN74LXC8T245
1. Yes. Please take a look at the recommended conditions on the datasheet. Just make sure DIR pin is set to Low
2. We have an evaluation board you can take a look at, AVCLVCDIRCNTRL-EVM
Regards,
Josh
Hi Josh
Are there any product recommendations for level shift 1.8V to 3.3V and 3.3V to 1.8V with speed up to 130MHz?
Hello Gareth,
Could you also provide how many channels you need and what interface you are trying to level translate?
Regards,
Josh
Hello Gareth,
Similar to what Clemens mentioned, we have the
All of these devices operate from 1.8V <-> 3.3V and support 130MHz.
Regards,
Josh