![](/html/Motorola/487645/page6.png)
t Vin VDD
Ain
7
VDD
10 pF
100 kΩ
u Vin VDD
0.01 µF
Ain
7
VDD
10 pF
100 kΩ
Figure 2. Analog Input (Operational Information Based on PDIP Package)
3.58 MHz
Xin
Xout
1 MΩ
ATB
MC145436A
VDD
Xin
ATB
MC145436A
VDD
Xen
Xen
TO OTHER
MC145436As
Figure 3. Multiple MC145436As
COL 1
697 1
COL 2
2
COL 3
3
COL 4
A ROW 1
770 4
STD
DTMF 852 7
(Hz)
941 *
1209
5
6
B ROW 2
8
9
C ROW 3
0
#
D
1336 1477 1633
STD DTMF (Hz)
ROW 4
Figure 4. 4 × 4 Keyboard Matrix
MC145436A
6
MOTOROLA