W91310 Datasheet, PDF (3/12 Pages) Winbond – TONE/PULSE DIALER WITH REDIAL FUNCTION

W91310 SERIES
Pin Description, continued
SYMBOL
PIN
DP
11
DTMF
12
I/O
FUNCTION
O N-channel open drain dialing pulse output (Figure 1). Flash key will
cause DP to go active in both pulse mode and tone mode.
O In pulse mode, remains in low state at all times. In tone mode,
outputs a dual or single tone. Detailed timing diagram for tone
mode is shown in Figure 2(a, b).
OUTPUT FREQUENCY
Specified
Actual
Error %
R1
697
699
+0.28
R2
770
766
-0.52
R3
852
848
-0.47
R4
941
948
+0.74
C1
1209
1216
+0.57
C2
1336
1332
-0.30
C3
1477
1472
-0.34
VDD, VSS
B/M
14, 6
5
I Power input pins.
I The break make ratio is 60:40 if B/M = 1 and is 66.6:33.3 if B/M =
0. This pin has no function in DTMF mode.
Publication Release Date: January 1995
-3-
Revision A3