msm7715 Oki Semiconductor, msm7715 Datasheet - Page 8

• Manufacturer Part Number: msm7715
• Description: Multi-function Telecommunication Lsi
• Manufacturer: Oki Semiconductor

¡ Semiconductor
Note:
AC Characteristics (Modem)
*1 When the carrier detector does not detect (CD="1"), RD is fixed to "1".
AC Characteristics (Call progress tone detector)
Modem Transmit Level
Signal Level Relative Value
Modem Transmit
Carrier Frequency
Transmit Signal Output Deray
Time
Modem Receive Signal Level
Carrier Detection (CD)
Signal Level
CD Level Hysteresis
CD Delay Time
CD Hold Time
Demodulated Data Bias
Distortion
NRTS Signal Versus
Modem Receive Signal
Allowable Level Ratio
Receive data output Delay
Time
CPT Detect Level
CPT Non-Detect Level
CPT Detect Frequency
CPT Non-Detect Frequency
CPT Detect Delay Time
CPT Detect Hold Time
Parameter
Parameter
*1 0 dBm = 0.775 Vrms (For all AC characteristics)
*2 "Normal condition" means that a DTMF signal appears after more than 20 ms after
*3 "Just after mode change" means that there is an input signal when the mode is
setting DTMF receive mode.
changed from DTMF transmit mode to DTMF receive mode. If there is an input
signal when power is turned on, see "DTMF mode setting procedure after power on
or after releasing power down mode".
Symbol
Symbol
V
V
t
f
f
t
t
V
t
t
t
V
V
DETCP
DELCP
HOLCP
V
CDH2
t
REJCP
V
t
V
CDD1
CDD2
CDH1
D
V
DETCP
REJCP
f
f
f
f
RDD
ADD
AOM
OM
HYS
AM
AIM
OS
AS
OFF
DM
ON
NR
BS
Measured at AOUT pin, R1 = R2
Mark signal/space signal
Originate mode
Answer mode
TD Æ AOUT
Measured at AIN. FSK modulation signal
Answer mode : 1080 Hz
Originate mode : 1750 Hz
VR2 open at AIN pin
OFF Æ –6 dBm
OFF Æ –40 dBm
–6 dBm Æ OFF
–40 dBm Æ OFF
300 bps,1 : 1 pattern
V
NRTS : 2765 Hz ±30 Hz
AIN Æ RD
400 Hz
400 Hz
See Fig. 3.
See Fig. 3.
NRTS
/V receive modem signal
Condition
Condition
—
—
Mark, TD = "1"
Space, TD = "0"
Mark, TD = "1"
Space, TD = "0"
OFFÆON
ONÆOFF
(V
(V
DD
DD
= 2.5 V to 3.6 V, Ta = –40°C to +85°C)
= 2.5 V to 3.6 V, Ta = –40°C to +85°C)
–48 *1
Min.
1176
1646
1846
Min.
–1.5
–11
976
–48
–40
380
500
—
—
—
—
20
—
—
—
—
—
—
—
—
5
Typ.
1180
1650
1850
Typ.
980
–44
–46
3.5
–9
—
14
31
23
—
—
—
—
—
—
—
20
15
0
2
8
5
Max.
Max.
1184
1654
1854
984
–42
±10
–60
420
300
MSM7715
1.5
–7
—
–6
—
—
—
22
40
—
–2
—
–6
—
—
—
Unit
dBm
dBm
Unit
dBm
dBm
8/21
ms
ms
ms
ms
ms
dB
dB
dB
Hz
Hz
Hz
%