IL91210E Datasheet, PDF (5/11 Pages) Integral Corp. – Tone/Pulse Dialer High-Performance Silicon-Gate CMOS

IL91210E
b. Off Hook D1 . . . Dn */T Dn+1 Pulse Mode
Dn+m DTMF Mode
Pulse mode is initially defined with the mode
selection pin, MODE SELECT, equal to V_CC. At this
time, the mode can be switched to DTMF by
pressing the */T key. DTMF mode will begin as
soon as the last pulse has been transmitted. In this
mode, Dn+1 through Dn+m are sent through the
TONE OUT pin as DTMF signals. If a P key entry
is contained in the series of digits before or after the
*/T entry, or the MODE SELECT switch is
depressed, 2.2 second pause will be added to the
automatically inserted pause time, which is also
2.2 seconds. Both of the above switching modes can
store as many as 31 digits in the redial memory.
6. One-Key redialing
Off Hook D1
......
Dn RD
If the dialing of D1 to Dn is completed, pressing RD
will cause the pulse dialing pin to go low for
2.2 seconds of break time and an 824 ms pause will
automatically be added. Otherwise, the pressing of
the redial key will be ignored.
7. Flash dialing
Off Hook F D1 ^{. . . . . .} Dn
The flash keys emulate quick On-Off Hook
operations. Pressing the flash keys, F1 or F2, will
cause a break of 96 ms or 640 ms on the DP output
pin. Then, it will pause for 824 ms and continue
dialing the digits, D1 to Dn . These digits are then
stored in the redial memory. Each time the flash key
is pressed, the redial memory will be cleared to store
a new entry. In addition, the MODE SELECT status
will be checked again for the setting of the
Tone/Pulse dialing mode.
Similarly, to make sure that the IC is working
properly, new flash key inputs will be ignored as
long as the digits that were dialed have not finished.
MAXIMUM RATINGS^*
Symbol
V_CC
V_IN
V_OUT
V_OUT
I_TONE
P_D
Tstg
Parameter
DC Supply Voltage (Referenced to GND)
DC Input Voltage (Referenced to GND)
DC Output Voltage (Referenced to GND)
DC Output Voltage (DP, XMITMUTE)
DC Output Current(Tone)
Power Dissipation in Still Air,
Plastic DIP^**
Storage Temperature
Value
Unit
-0.3 to +6.0
V
-0.3 to V_CC +0.3
V
-0.3 to V_CC +0.3
V
-0.3 to 1.2
V
50
mA
500
mW
-40 to +125
°C
* _{Maximum Ratings are those values beyond which damage to the device may occur.}
Functional operation should be restricted to the Recommended Operating Conditions.
** _{Durating: -10} mW_{/°C from 65°C to 70°C.}