鈩?/div>
STANDARD CMOS NOISE IMMUNITY
DESCRIPTION
The
M22101
and
M22102
crosspoint switches con-
sist of 4 x 4 x 2 arrays of crosspoints (transmission
gates), 4-line to 16-line decoders, and 16 latch cir-
cuits. Any one of the sixteen crosspoint pairs can be
selected by applying the appropriate four-line ad-
dress and any number of crosspoint pairs can be ON
simultaneously. Corresponding crosspoints in each
array are turned on and OFF simultaneously, also.
In the
M22101,
the selected crosspoint pair can be
turned on or off by applying a logical ONE or ZERO,
respectively, to the data input, and applying a ONE
to the strobe input. When the device is 鈥漰ower-up鈥?
the state of the 16 switches is indeterminate.
PIN CONNECTIONS
Therefore all switches must be turned off by putting
the strobe hight, data-in-low, and the addressing all
switches in succession.
The selected pair of crosspoints in the
M22102
is
turned on by applying a logical ONE to the K
a
(set)
input while a logical ZERO is on the K
b
(reset) input,
and turned off by applying a logical ONE to the K
b
input while a logical ZERO is on the K
a
input. In this
respect the control latches of the
M22102
are similar
to SET/RESET flip-flops. They differ, however, in
that the simultaneous application of ONEs to the K
a
and K
b
inputs turns off (resets) all crosspoints. All
crosspoints in both devices must be turned off as
V
DD
is applied.
B1
(Plastic Package)
F1
(Ceramic Package)
ORDER CODES :
M22XXX B1
M22XXX F1
September 1988
1/8