CH1782A 데이터 시트보기 (PDF) - Cermetek Microelectronics
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CH1782A Datasheet PDF : 19 Pages
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Cermetek Microelectronics, Inc.
CH1782A Family of Ultra Small Modem Modules V.22bis-2400bps
Parameters
VCC
ICC Off-Hook
ICC On-Hook
ICCPD
VIH
VIL
IIN
ILO
VT+
VT-
VOH
VOL
Table 5. CH1782A Electrical Specifications.
TA=0°C to 50°C, VCC=+5V ± 5%
Output Load = 50pF ± 1 TTL
Description
Positive Supply Voltage
Nominal Operating current modem is Off-Hook
Nominal Operating current modem is On-Hook
Power Down Current
High Level Input Voltage
Low Level Input Voltage
Input Leakage Current (TXD, DTR, RTS)
Leakage Current DCD, HS, RXD, SLEEP, DSR
Positive Hystersis Threshold for RESET pin
Negative Hystersis Threshold for RESET pin
High Level Output (IOH=0.5mA)
Low Level Output (IOL=1.6mA)
Min.
4.75
2
-0.3
15
2.4
Typ.
5.0
50
25
2.5
1.8
Max
5.25
75
50
10
0.8
100
10
0.6
Units
V
mA
mA
mA
V
V
uA
uA
V
V
V
V
Parameters
Tone 2nd Harmonic Distortion
Table 6. CH1782A Performance Specifications.
Min. Typ. Max Units
Comments
-35 dB HYB enabled into 600Ω
DTMF Transmit (Level)
-5.5
-0.5 dBm
DTMF Twist (Balance)
3
dB
DTMF Tone Duration
50
255 ms 95ms default
Pulse Dialing Rate
100 20 pps 100pps default
Pulse Dialing Make/Break
39/61
% US, Canada default
Pulse Dialing Make/Break
33/67
% UK, Hong Kong
Pulse Interdigit Interval
700
3000 ms 789ms default
Guard Tone Frequency
550
Hz Referenced to High Channel Transmit
Guard Tone Amplitude
-6
dB Referenced to High Channel Transmit
Guard Tone Frequency
1800
Hz Referenced to High Channel Transmit
Guard Tone Amplitude
-9
dB Referenced to High Channel Transmit
High Channel Transmit Amplitude
Guard Tone 2nd Harmonic Distortion
-1
dB Referenced to Low channel, Guard Tone
enabled
-40
dB
Call Progress Passband Frequency
120
620 Hz
Wait Time for Dial Tone
2
255 sec Two second default
2002 Cermetek Microelectronics, Inc.
Page 16
Document No. 607-0009 Revision C (01/03)
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