CH2056A ET Cermetek Microelectronics, CH2056A ET Datasheet - Page 21

• Manufacturer Part Number: CH2056A ET
• Manufacturer: Cermetek Microelectronics

Specifications of CH2056A ET

• Main Category: Single Chip
• Power Supply Type: Analog
• Operating Supply Voltage (typ): 3.3/5V
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Through Hole
• Lead Free Status / RoHS Status: Not Compliant

Cermetek Microelectronics, Inc.
2007 Cermetek Microelectronics, Inc.
Off Hook Impedance
Trans Hybrid Loss
Ring Voltage Loop
Line Loop Current – (Off
Hook)
Return loss @ 1000 Hz
Ring Frequencies
Receiver Insertion Gain
Transmit Power
First Character After Reset
Inter Character Delay
Command Delay
Minimum Reset Pulse
Duration
Note: Must wait for modem response before issuing a new command.
Name
SPK
Parameter
PIN NO.
10
11
1
2
3
4
5
6
7
8
9
O(DF)
Type
110V
Min.
-0.5
100
3.0
20
20
10
Table 10. HS Modem Family Pin Functions.
FUNCTION
Table 8. HS Modem Electrical Specifications.
PACKAGE CONNECTION TABLE
RING
RXD
SPK
TXD
Table 9. Analog Characteristics.
TIP
NC
NC
NC
NC
NC
T1
Minimum Load
Maximum Capacitive Load
Output Impedance
Output Voltage
D.C. Offset
Typ.
-9.5
200
0.0
25
20
15
40
50
250V
Max.
+0.5
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100
Characteristic
Units
msec
msec
msec
Ohm
dBm
V
mA
sec
dB
dB
Hz
dB
PP
CH179XA/2056A High Speed Family of Ultra Small Modems
PIN NO.
12
13
14
15
16
17
18
19
20
21
22
600 Ohm, RXA, TXA
On 48VDC line voltage for sustained
periods
Does not apply to CH1799A-L
600 Ohm
600 Ohm – Data Mode
Delay
Between all command characters
Between all AT command characters*
If user supplied
Document No. 607-0020 Revision B (01/07)
300 Ohms
0.01µf
10 Ohms
2.5 ± 1.6V
<20mV
Comments
FUNCTION
Value
GND
DSR
DCD
VCC
DTR
CTS
RST
RTS
NC
NC
RI