W91440N Datasheet, PDF (8/14 Pages) Winbond – 10-MEMORY TONE/PULSE DIALER WITH SAVE FUNCTION

W91440N SERIES
DC Characteristics, continued
PARAMETER
DP Output Sink Current
T/P MUTE Output Sink
Current
Keypad Input Drive
Current
Keypad Input Sink
Current
HKS I/P Pull-High
Resistor
Keypad Resistance
SYMBOL
CONDITIONS
IPL
VPO = 0.5V
ITML
VTMO = 0.5V
IKD
VI = 0.0V
IKS
VI = 2.5V
RHK
-
RK
-
MIN. TYP. MAX.
0.5
-
-
0.5
-
-
UNIT
mA
mA
30
-
-
µA
200 400
-
µA
-
300
-
KΩ
-
-
5.0
KΩ
AC CHARACTERISTICS
(VDD−VSS = 2.5V, FOSC. = 3.579545 MHz, TA = 25° C, all outputs unloaded)
PARAMETER
SYMBOL
CONDITIONS
Key in Debounce
TKID
-
Key Release Debounce TKRD
-
Pulse Mute Delay
TMD Mode = VDD
Mode = Floating
Pre-digit-pause1
TPDP1 Mode = VDD
10 ppS Mode = Floating
Pre-digit-pause2
TPDP2 Mode = VDD
20 ppS Mode = Floating
Interdigit Pause
TIDP 10 ppS
(Auto Dialing)
20 ppS
Make/Break Ratio
M:B Mode = VDD
Mode = Floating
Tone Output Duration
TTD Auto dialing
Intertone Pause
TITP Auto dialing
Flash Break Time
TFB
F1
F2
F3
F4
MIN.
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
TYP.
20
20
40
33.3
40
33.3
20
16.7
800
500
40:60
33:67
93
93
600
300
73
100
MAX.
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
UNIT
mS
mS
mS
mS
mS
mS
%
mS
mS
mS
-
-8-