They might be, although that description is unpleasantly mangled as it has '27C256' (a completely different device) right in the middle of the description line. Unfortunately while my programmer can definitely programme the TMS2532 it doesn't support the Hitachi version, someone else's programmer may do so though.
The pinout looks OK, with A11 in the right place (on pin 18).
https://www.jrok.com/datasheet/HN2532.pdf