CH1786LC Cermetek Microelectronics, CH1786LC Datasheet - Page 11

• 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.
AT
A
A/
Bn*
D
E*
Hn
Ln*
Mn*
On
Qn*
Sn
Sn=
Sn?
Vn*
Xn*
+++
,
?
Yn*
Fn
Zn
+FCLASS=n
+F<command>?
+F<command>=?
+FAA=n
+FF
+FTS=n
+FTM=n
+FTH=n
+FTH=n
+FRH=n
+FRT=n
+FTTn=m
P
R
T
W
;
@
!
,
0-9
A,B,C,D, #, *
Commands
Dial Modifiers
FAX Command
Table 5. CH1786 AT Command Set Summary.
Basic
Table 6A. FAX Command Set Summary.
Table 6B. Dial Modifiers Summary.
Dial Command
Switch Hook Control Option
Speaker Volume Option
On-Line Command
Result Code Display Option
Select an S Register
Write to an S Register
Read an S Register
Result Code Set/Call Progress
Option
Escape Sequence
Returns Last addressed S-Register
On Line Echo character Option
Restore Active Profile
Attention Code
Answer command
Repeat last Command
Communications Standard Option
Off-Line Character Echo Option
Speaker Control Option
Result code Form Option
Pause
Long Space Disconnect Option
Pulse Dial
Originate Call in Answer Mode
Touch Tone Dial
Wait for Dial Tone
Return to Idle State
Wait for Quiet Answer
Command
Flash Hook
Pause
Allowed Dial Digits/Characters
Select Service Class
Report Active Configuration
Report Operating Capabilities
Data/Fax Auto Answer
Enhanced Flow Control
Stop Transmission and Wait
Transmit Data
Receive Data
Transmit Data with HDLC
Framing
Receive Data with HDLC
Framing
Receive Test Data
Transmit test Data
Function
Function
Function
Page 11
PHONE LINE CONNECTION GUIDELINES
1. The CH1786 must be mounted in the final
2. The circuitry from the CH1786 to the telephone
3. Connection to phone line should be made
4. PCB traces from the modem’s RING and TIP pins
5. The RING and TIP PCB traces should be as
6. No additional circuitry other than that shown in
7. The CH1786LC, and CH1786NH (only) requires
8. The CH1786, the RJ-11C jack, the interfacing
&Cn*
&Dn*
&Fn
&Gn*
&Pn*
&Sn*
&Tn
&V
&Wn*
&Yn*
&Zn*
Table 6C. Ampersand and Percent Commands.
Ampersand
Commands
assembly such that it is isolated from exposure to
any hazardous voltages within the assembly.
Adequate separation and restraint of cables and
cords must be provided.
line interface must be provided in wiring that
carries no other circuitry
specifically allowed in the FCC rules (such as A
and A1 leads).
through an RJ-11C jack.
to the RJ-11C jack must be 0.1 inch spacing or
greater to one another and 0.2 inch spacing or
greater to all other traces.
have a nominal width of 0.020 inches or greater.
short as possible and oriented to prevent
coupling other high speed or high frequency
signals present on the host circuit PCB.
Figure 7A or 7B may be connected between the
modem module and the RJ-11C jack. Doing so
will invalidate the FCC approval.
external surge protection (see Figure 7B). This is
mandatory to maintain FCC Part 68 conveyed
approval.
circuitry and all PCB traces in between, must be
contained on a PCB with a 94 V-0 flammability
rating.
CH1786 Family of Ultra Small 2400bps Modems
Data Carrier Detect Option
Data Terminal Ready Option
Restore Active Profile
Guard Tone Option
Make to Break Ratio Section
Data Set Ready Option
Test Command Option
View Active Configuration
Store Active Profile
Set Profile to be used after hard
reset
Store Telephone Numbers
Document No. 607-0004 Revision L4 (08/04)
Function
The traces should
other
than that