SN65HVD3088E: supply current graph in the datasheet

Hello Hiroshi san,

thank you for pointing this out, yes I understand your problem. Regarding figure 4 on the datasheet:

1. Yes the X-axis indicates the signaling rate and the starting point is at 1 kbps. Figure 4 is specific for SN65HVD3088E and this device has a specified max signal rate of 20 Mbps, you can see this value as the last point drawn of the plot (scale is in dB) and also at paragraph 6.3 Recommended Operating Conditions. Just as a reference, you can see in Figure 3 the device SH65HVD3085E where the X-axis is again the signal rate, minimum 1 kbps and maximum at 1 Mbps (info can also be found at paragraph6.3 ). I'm sorry about the missing information, I'll make sure to get that graph fixed properly.

2. Even though it's a half duplex device, the graph shows the sum of the Driver and Receiver supply current. One reason to show the sum of them is that it represents the worst case scenario for the power consumption. The second reason is that you can actually test if the transmission through that transceiver works within specs; maintaining both driver and receiver on, allows you to send data on the bus (through the driver) and check if the stream of data sent is ok through the receiver of the same transceiver.

I hope this makes sense and helps you with your customer. Let me know if you have any additional question.

Thank you and best regards,
Adrinan