CH1786LC Cermetek Microelectronics, CH1786LC Datasheet - Page 17

• Manufacturer Part Number: CH1786LC
• Manufacturer: Cermetek Microelectronics

Specifications of CH1786LC

• Main Category: Single Chip
• Data Rate: 2.34375Kbps
• Power Supply Type: Analog
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (min): 4.75V
• Operating Supply Voltage (max): 5.25V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Through Hole
• Lead Free Status / RoHS Status: Supplier Unconfirmed

Cermetek Microelectronics, Inc.
2004 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
Parameter
nd
Harmonic
Name
SPK
nd
Minimum
700
120
50
Table 10. Other Performance Specifications.
8
2
Table 11. Analog Characteristics.
O(DF)
Type
Typical
39/61
33/67
1800
550
-40
10
30
-6
-9
-1
3
Page 17
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 L4 (08/04)
HYB enabled into 600Ω
95ms default
10pps default
789ms default
Referenced to High Channel
Referenced to High Channel
US, Canada default
UK, Hong Kong
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