msm7718-01 Oki Semiconductor, msm7718-01 Datasheet - Page 20

• Manufacturer Part Number: msm7718-01
• Description: Echo Canceler With Adpcm Codec
• Manufacturer: Oki Semiconductor

¡ Semiconductor
AC Characteristics (Tone Detect Function)
Note : In the case of call progress tone, DTMF tone, and 2100 Hz tone, XX refers to cp, dt, and
CPT Detection Frequency
CPT Non-detection Frequency
CPT Detection Level
CPT Non-detection Level
CPT Input Signal Continuation Time
CPT Detection Delay Time
CPT Detection Hold Time
DTMF Detection Frequency
DTMF Non-detection Frequency
DTMF Detection Level
DTMF Non-detection Level
DTMF Input Signal continuation Time
DTMF Detection Delay Time
DTMF Detection Hold Time
ANS Detection Frequency
ANS Non-detection Frequency
ANS Detection Level
ANS Non-detection Level
ANS Input Signal Continuation Time
ANS Detection Delay Time
ANS Detection Hold Time
INPUT SIGNAL
DETECPT: CR7-B3
DETDTMF: CR7-B2
DET21L: CR7-B1
DET21L: CR7-B1
INT pin
INT: CR7-B4 (positive logic)
an respectively.
Parameter
Symbol
V
V
V
V
V
f
t
t
t
V
f
t
t
t
f
t
f
t
t
t
f
t
f
t
detcp
detcp
dlycp
holcp
detan
detan
dlyan
holan
rejcp
rejcp
detdt
detdt
dlydt
holdt
rejan
rejan
detcp
rejdt
rejdt
detan
detdt
rejcp
rejan
rejdt
t
dlyXX
Input Frequency: 350 to 640 Hz
CPT detected
CPT not detected
At Nominal Frequency
At Nominal Frequency
Input Frequency:Nominal Frequency ±1.5%
CPT detected
CPT not detected
Input Frequency: 2079 to 2121 Hz
CPT detected
CPT not detected
t
detXX
The state of the INT pin is changed by reading the
contents of CR7. It is retained when CR7 is not read.
Condition
—
—
—
—
—
—
—
—
—
—
—
—
—
(V
DD
t
= 2.7 to 3.6 V, Ta = –25 to +70°C)
holXX
2079 2100 2121
2350
Min.
±3.8
t
350
700
–39
–39
–31
480
420
rejXX
—
—
55
—
30
—
—
38
—
16
14
—
—
—
7
7
Typ. Max. Unit
450 480
MSM7718-01
—
—
—
—
—
—
—
45
16
—
—
—
—
—
—
—
—
—
— 1900
—
—
—
—
12
±1.5
640
250
–35 dBm0
420
–49 dBm0
–47 dBm0
—
—
—
17
—
30
55
24
—
—
16
38
25
0
0
0
20/38
dBm0
dBm0
dBm0
ms
ms
ms
ms
ms
Hz
Hz
Hz
ms
ms
ms
ms
ms
ms
ms
%
%
Hz
Hz
Hz