inter
Pin
STB
OE
01
0
-01
7
090-
00
7
(8282)
00
0
:..00
7
(8283)
8282/8283
Table 1. Pin Description
Description
STROBE
(Input).
STB
is
an
input control
pulse used to strobe data at the data input
pins (Ao-A
7
) into the data latches. This
signal is active
HIGH
to admit input data.
The
data is latched at the
HfGH
to
LOW
transition of
STB.
OUTPUT
ENABLE (Input).
i5E
is
an
input
control signal which
when
active
LOW
enables the contents of the data latches
onto the data output pin
(Bo-B7).
OE
being
Inactive
HIGH
forces the output buffers to
their high impedance state.
DATA
INPUT
PINS
(Input).
Data
presented
at these pins satisfying setup time
re-
quirements
when
STB
Is strobed
and
latched into the data input latches.
DATA
OUTPUT
PINS
(Output).
When
OE
Is
true, the data in the data latches is
pre·
sented
as
Inverted
(8283)
or non·inverted
(8282)
data onto the data output pins.
FUNCTIONAL DESCRIPTION
73
The 8282 and 8283 octal latches are 8·bit latches with
3-state output buffers. Data having satisfied the setup
time
requirements is latched
into
the data latches by
strobing the
STB
line HIGH
to
LOW. Holding the ST8
line
in
its
active HIGH state makes the latches appear
transparent. Data is presented
to
the data output pins by
activating the
OE
input line. When
OE
is inactive HIGH
the output buffers are in their high impedance state.
Enabling
or
disabling the output buffers
wili
not cause
negative-going transients
to
appear on the data output
bus.
AFN-D0727C
