Electronic Two Tone Ringer

Description GL6840A are monolithic integrated circuits designed to replace the mechanical bell in telephone sets, in connection with an electro acoustical converter. The device can drive either directly a piezo ceramic converter(buzzer) or a small loudspeaker. In this case a transformer is needed

Electronic two tone ringer

Programmable Timer Module(PTM)

Programmable Timer Module(PTM) The MC6840 is a programmable subsystem component of the M6800 Family designed to provide variable system time intervals. The MC6840 has three 16-bits binary counters, three corresponding control registers, and status register. These counters are under software cont

Programmable Timer Module(PTM)

Programmable Timer Module(PTM) The MC6840 is a programmable subsystem component of the M6800 Family designed to provide variable system time intervals. The MC6840 has three 16-bits binary counters, three corresponding control registers, and status register. These counters are under software cont

Programmable Timer Module(PTM)

Programmable Timer Module(PTM) The MC6840 is a programmable subsystem component of the M6800 Family designed to provide variable system time intervals. The MC6840 has three 16-bits binary counters, three corresponding control registers, and status register. These counters are under software cont

Programmable Timer Module(PTM)

Programmable Timer Module(PTM) The MC6840 is a programmable subsystem component of the M6800 Family designed to provide variable system time intervals. The MC6840 has three 16-bits binary counters, three corresponding control registers, and status register. These counters are under software cont

Programmable Timer Module(PTM)

Programmable Timer Module(PTM) The MC6840 is a programmable subsystem component of the M6800 Family designed to provide variable system time intervals. The MC6840 has three 16-bits binary counters, three corresponding control registers, and status register. These counters are under software cont