W91520N Datasheet, PDF (7/16 Pages) Winbond – TONE/PULSE DIALER WITH HANDFREE AND HOLD FUNCTION

W91520N SERIES
finished,
otherwise, D1, D2, ..., Dn will be duplicated to the save memory.
Flash
OFF HOOK (or ON HOOK & _HFI ¡õ ), Fn
1. Fn = F1, ..., F4
2. The dialer will execute a flash break time of 600 mS (F1), 100 mS (F2), 300 mS (F3), or 73 mS
(F4). In each case the flash pause time is 1.0 sec. before the next digit is dialed out.
3. Flash key cannot be stored as a digit in memory. The flash key has first priority among the
keyboard
functions.
4. The system will return to the initial state after the flash pause time is finished.
5. The flash function timing diagram is shown in Figure 7.
HOLD
OFF HOOK (or ON HOOK & _HFI ¡õ
), H
The HOLD is switched on and off by hold key. The other keypads will be disabled when in hold mode.
The function timing diagram is shown in Figure 3(a, b, c).
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
DC Supply Voltage
VDD−VSS
Input/Output Voltage
VIL
VIH
VOL
VOH
Power Dissipation
PD
Operation Temperature
TOPR
Storage Temperature
TSTG
RATING
-0.3 to +7.0
VSS -0.3
VDD +0.3
VSS -0.3
VDD +0.3
120
-20 to +70
-55 to +150
UNIT
V
V
V
V
V
mW
°C
°C
Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability of the
device.
Publication Release Date: May 1997
-7-
Revision A3