ch1786nh ETC-unknow, ch1786nh Datasheet - Page 16

• Manufacturer Part Number: ch1786nh
• Description: Ch1786 Family Ultra Small 2400bps Modems
• Manufacturer: ETC-unknow

Cermetek Microelectronics, Inc.
Tone 2
Distortion
DTMF Twist (Balance)
DTMF Tone Duration
Pulse Dialing Rate
Pulse Dialing Make/
Break
Pulse Dialing Make/
Break
Pulse Interdigit Interval
Guard Tone Frequency
Guard Tone Amplitude
Guard Tone Frequency
Guard Tone Amplitude
High Channel Transmit
Amplitude
Guard Tone 2
Harmonic Distortion
Call Progress
Passband Frequency
Wait Time for Dial tone
Return loss @ 1000Hz
2003 Cermetek Microelectronics, Inc.
Parameter
nd
Harmonic
Name
SPK
nd
Minimum
120
700
50
Table 10. Other Performance Specifications.
8
2
O(DF)
Table 11. Analog Characteristics.
Type
Typical
39/61
33/67
1800
550
-40
10
30
-6
-9
-1
3
Page 16
Maximum
3000
255
620
255
-35
20
Minimum Load
Maximum Capacitive Load
Output Impedance
Output voltage
D.C. Offset
Characteristic
Units
pps
sec
ms
ms
dB
dB
Hz
dB
Hz
dB
dB
dB
Hz
dB
%
%
CH1786 Family of Ultra Small 2400bps Modems
Document No. 607-0004 Revision L1 (06/03)
HYB enabled into 600Ω
95ms default
10pps default
Referenced to High Channel
Referenced to High Channel
US, Canada default
UK, Hong Kong
789ms default
Transmit
Referenced to High Channel
Transmit
Transmit
Referenced to High Channel
Transmit
Referenced to Low channel,
Guard tone enabled
Two second default
T
r
=600Ω + 2.16 µF
300Ω
0.01µ
10Ω
2.5± 1.6V
<20mV
Comments
Value