TEA1069 datasheet(25/44 Pages) PHILIPS

25 / 44 page

1998 Jan 08

Philips Semiconductors

Product speciﬁcation

Versatile speech/dialler/ringer with

music-on-hold

TEA1069; TEA1069A

Fig.23 Conversation states.

handbook, full pagewidth

MBH211

STANDBY

HOLD

HANDSET

MUTE

HANDSFREE

[HOLD/MUTE]

+ HMS = off

[HOLD/MUTE]

+ HMS = on

[HOLD/MUTE]

+ HMS = on

[HOLD/MUTE]

+ HMS = off

[HOLD/MUTE]

[HOOK]

+ on-hook

[HOOK]

+ off-hook

on-hook

off-hook

on-hook

on-hook + pin HOLD = LOW

CONVERSATION

• Handset state.

The conversation states are shown in Fig.23.

• Hands-free state.

In hands-free mode output HF becomes HIGH which

activates a TEA1093/1094 hands-free IC. This state can

be reached from standby state and from the handset

state as follows:

– the [HOOK] key is pressed during standby mode

– the [HOOK] key is pressed during handset state is

lifted, then when the handset is put on the cradle the

set stays in the hands-free mode.

The set leaves the hands-free mode and output HF

becomes LOW when:

– the [HOOK] key is pressed and the handset is on the

cradle, the set goes to the standby mode

– the [HOOK] key is pressed and the handset is lifted,

the set goes to the handset state.

The volume on the loudspeaker or buzzer, in hands-free

and ringer mode, can be controlled in four levels using

the [VOL+] and [VOL

−] keys.

The hands-free volume can be changed according to

Fig.24.

• Hold state.

The hold state is entered when the [HOLD/MUTE] key is

pressed (diode HMS = on). This state can be entered

either from handset state or from hands-free state. Upon

entering this state outputs HF and MUTE become LOW.

In hold state a music-on-hold melody is generated by

output TONE. Pin MOH/DMO is HIGH (diode

GOS = off) during this state. This signal can be used to

adjust the volume of the TONE pin. Since MUTE is LOW

the TONE output is transmitted to the telephone line.

As long as the TEA1069 and TEA1069A are in this state

the HOLD input pin is tested.

The set leaves the hold state when:

– [HOLD/MUTE] is pressed, the set returns to either the

handset or hands-free state

– the HOLD input becomes LOW, now the TEA1069

and TEA1069A return to the standby state.

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