Dimitry,
SN75C185 can support this, but it would require an external bipolar power rail since it does not have an integrated charge pump. SN75LBC187 has a charge pump and can support 7 V (typical) output. Would either of these be suitable for your…
Hugo and Zhang,
For a nominal 9V output I suggest TRS211 or TRS213. These devices have an extra driver. You can connect the unused DIN to ground the leave the unused DOUT open.
With 7V typical output, there is also SN75LBC187 and SN75LV4737A. The latter…
