NT91214 查看數據表（PDF） - Unspecified
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NT91214 Datasheet PDF : 23 Pages
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NT91214/15 Series
Pin Descriptions (continued)
Pin No.
NT91215A NT91215B NT91215C NT91215D Designation I/O
NT91214A NT91214B NT91214C NT91214D
Description
8
8
9
9
XMITMUTE O Dialing transmission mute output
This is an N-channel open drain output
The XMITMUTE is normally "OFF"
During pulse of DTMF dialing this
output is "ON".
(N.A.)
9
(N.A.)
10
MODE OUT O Mode output pin
This is an N-channel, open drain output
It is "ON" during tone output and "OFF"
during pulse output.
13
15
14
16
R1
14
16
15
17
R2
15
17
16
18
R3
16
18
17
19
R4
Keyboard pins
This input serves as the interface to an
XY matrix keyboard. On a 4 x 4 matrix
keyboard, the input from the fourth
column, C4 , should be connected to
VSS.
10
12
11
13
C1
11
13
12
14
C2
12
14
13
15
6
6
7
7
5
5
6
6
C3
VDD
VSS
Power supply pins
These devices are designed to operate
from 2.0V to 5.5V.
9
V1.0
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