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參數(shù)資料
| 型號(hào)： | NTE1731 |
| 廠商： | NTE Electronics, Inc. |
| 英文描述： | Quadruple Operational Amplifier 14-TSSOP 0 to 70 |
| 中文描述： | 集成電路的CMOS 10號(hào)脈沖撥號(hào) |
| 文件頁數(shù)： | 3/5頁 |
| 文件大?。?/td> | 29K |
| 代理商： | NTE1731 |
(N = 1 to 9), followed by the address (1 to 9) of the memory location into which the number is to be
stored. This operation requires 300ms before going Off
–
Hook or reinitiating the store function. In-
formation present in the LND buffer is replaced when new data is entered and cannot be recalled.
Automatic Dialing
The automatic dialing function is implemented by going Off
–
Hook and entering a
followed by the address (1 to 9) of the desired telephone number. Dialing will begin with the valid entry
of the address dey, and can be interrupted by initiating a new radial command. The LND buffer will
contain the information last entered. A key sequence of
to be redialed.
Normal dialing is performed when telephone numbers are input in the Off
–
Hook mode.
Pause Continue Command
The NTE1731 permits pauses to be programmed within the 1 to 15 digits of the telephone number.
This pause is input and stored in memory with the # key. If a pause code is detected during automatic
dialing, the dialing operation is suspended. Any key except the
key is used to dial in data after the
pause, once the inter digital
–
pause time passes (CONTINUE command).
Normal dialing
Normal dialing is performed when telephone numbers are input in Off
–
Hook mode.
N
(N = 1 to 9),
0
will cause the last number entered
Sample Operation:
Example 1
1. On
–
Hook
2. Input
“
621
–
1221
”
3. Input
“
**5
”
4. Off
–
Hook
5. Input
“
**5
”
Example 2
1. Off
–
Hook
2. Input PBX access code
“
42
”
3. While waiting for dial tone, enter
“
#
” “
#
”
is written into memory.
4. Dial
“
1
–
234
–
621
–
1221
”
5. On
–
Hook
6. Input
“
**3
”
7. Off
–
Hook
8. Input
“
*3
”
9. Enter
”
3
”
(CONTINUE Command)
while waiting for a dial tone.
“
621
–
1221
”
is written into the memory buffer
“
621
–
1221
”
is stored in location 5.
“
621
–
1221
”
is automatically dialed
“
42
”
is written into memory and dialed.
The number is written into memory and dialed.
“
42 #1
–
234
–
621
–
1221
”
is transmitted to location 3.
“
42
”
is dialed, then a pause occurs.
“
1
–
234
–
621
–
1221
”
is dialed.
Pin Description
V
DD
(Pin1)
Pin1 is the positive power supply pin with respect to the GND pin. Maximum input voltage is 6.0 Volts
Test Input (Pin2)
Pin2 is for testing the device. It should be connected to GND.
Keyboard Inputs (Pin3, Pin4, Pin5, Pin11, Pin12, Pin13, and Pin14)
The key entry is defined by either a single ROW being connected to a single COLUMN, or GND level
being simultaneously applied to both a ROW and a COLUMN. Consequently,either a single contact
or a standard 2
–
of
–
7 keyboard with GND common can be used.
Keyboard Inputs (Pin3, Pin4, Pin5, Pin11, Pin12, Pin13, and Pin14) (Cont
’
d)
The NTE1731 keyboard input pins are totally static until a valid key input is sensed. The oscillator
is then enabled and the rows and columns are alternately scanned (pulled high, then low) to verify
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