STM6502, STM6503 STM6504, STM6505 Dual push-button.
STM6502 - (STM6502 - STM6505) Dual push-button smart reset
STM6505 - (STM6502 - STM6505) Dual push-button smart reset
STM6503 - (STM6502 - STM6505) Dual push-button smart reset
STM6504 - (STM6502 - STM6505) Dual push-button smart reset