CH1788 Cermetek Microelectronics, CH1788 Datasheet - Page 22

• Manufacturer Part Number: CH1788
• Manufacturer: Cermetek Microelectronics

Specifications of CH1788

• Lead Free Status / RoHS Status: Supplier Unconfirmed

Cermetek Microelectronics, Inc.
Off Hook Impedance
Trans Hybrid Loss
Ring Voltage Loop
Line Loop Current-(Off-
Hook)
Return Loss @ 1000Hz
Ring Frequencies
Receiver Insertion Gain
Transmit Power
First Character After Reset
Inter Character Delay
Command Delay
Minimum Reset Pulse
Duration
2006 Cermetek Microelectronics, Inc.
Test conditions:
*Output Load = 30 pF ± one TTL.
Parameter
Idd1
Idd2
Idd3
V
V
V
V
V
I
CC
IN
OH
OL
IH
IL
Parameter
Positive Supply Voltage- Noise less than 50mV
Nominal Operating Current
High Level Input Voltage*
Low Level Input Voltage*
Input Leakage Current – All Pins
High Level @ -4mA 5V and 3.3V
Low Level @ 4mA
Power Down Idle mode Current
Power Down “Zero” Mode Current
CH1788 VCC = 5V ± 10%, Temp = 0°C to 70°F.
CH1788-3 VCC = 3.3V ± 10%, Temp = 0°C to 70°F
Minimum
Table 8. CH1788 D.C. Electrical Specifications.
110V
Table 9. CH1788 Operational Specifications.
-0.5
125
0.5
Description
10
50
0
Typical
-10.0
600
150
0.0
2.0
25
20
15
20
50
Page 22
Maximum
250V
+0.5
80
75
5V
3.3V
5V
3.3V
5V
3.3V
5V
3.3V
5V
3.3V
5V
3.3V
5V
3.3V
Ohms
Units
msec
msec
msec
dBm
dBm
mA
sec
V
dB
dB
Hz
CH1788 Surface Mount PLCC 2400bps Modem
pp
V
0.2 V
V
Min.
CC
4.75
2.70
Document No. 607-0018 Revision A6 (01/06)
CC
-.45
/2
CC
600 Ohm, RXA, TXA
On 48VDC line voltage offset
for sustained periods of
seconds.
600 Ohm
600 Ohm- Data Mode
When recommended
initialization is used.
Delay
Between all command
characters
Between all AT commands
If user supplied
Typ.
3.30
5.0
51
Comments
0.2 V
Max.
3.60
+5.5
0.45
5.3
3.0
2.5
.50
0.6
62
16
15
10
1
CC
Units
mA
mA
uA
uA
V
V
V
V
V