22

Rev. 7

July 1998

Data Sheet

AS2533...6

Symbol

Parameter

Conditions

Min

Typ

Max

Units

t

FD

Flash Duration 1

R1 key

100

102

ms

Flash Duration 2

R2 key

270

300

ms

Flash Duration 3

R3 key (AS2533/4B/5/6)

600

650

ms

R3 key (AS2534E only)

312

375

450

ms

t

PFP

Post Flash Pause

274

ms

t

AP

Access Pause

Note 8

2.0

2.05

2.12

sec

t

RP

Repeat Break Time

1.6

sec

Tone Ringer

V

MO

Melody Output

PDM

t

MD

Melody Delay

10

ms

F1

Frequency 1

800

Hz

F2

Frequency 2

1067

Hz

F3

Frequency 3

1333

Hz

t

DT

Detection Time

Initial

1/f + 73ms

s

t

TO

Detection Time-out

note 4

ms

f

MIN

Min. Detection Frequency

13

Hz

f

MAX

Max. Detection Frequency

70

Hz

Pacifier Tone

Programme Mode Only

f

PT

Frequency

P/M mode, key entry

1477

Hz

V

RT

Level (RO)

Key entry

60

mV

t

RTD-E

Duration, Key Entry

Valid key entry, prog.

40

ms

t

RTD-A

Duration, Acknowledge

Terminate with P/M key

140

ms

t

RTD-R

Duration, Reject

Invalid key entry, note 7

4x40

ms

LED Output

t

LED-ON

"on-time"

P/M state

80

ms

t

LED-OFF

Interval

P/M state

1

sec

Comfort Tone (DTMF)

V

CT

Level (RO)

Relative to LS

-30

dBr

Note 1: The values are valid during automatic dialling and are minimum values during manual dialling, i.e. the tones will

continue as long as the key is depressed.

Note 2: The rise time is the time from 10% of final value till the tone amplitude has reached 90 % of its final value.

Note 3: Relative to high group.

Note 4: The FCI circuit is reset by POR and HS/DPN pulled high (off-hook). After a reset the FCI circuit is in a standby state. A

positive edge on FCI will start a 73 ms timer and the frequency discrimination is initiated. Whenever a period of the ring

signal is missing, the timer is reset. When a valid ring signal is present for 73 ms, the melody generator is started and is

directly controlled by the ring signal. This condition will remain until a new reset.

Note 5: This does not include the frequency deviation of the ceramic resonator.

Note 6: During temporary MF mode.

Note 7: An invalid key entry in programme mode will invoke a tone sequence with 4 tone bursts of 40 ms and pauses between

bursts of 28 ms and abort the programme mode.

Note 8: Pauses inserted within the first 5 entries of a digit string will be automatically terminated after 2 seconds. Pauses

inserted after location 5 can only be terminated manually by pressing the PS or LNR key.