參數(shù)資料
型號: 4055B
元件分類: 復位半導體
英文描述: 300mA LDO Linear Regulators with Internal Microprocessor Reset Circuit
中文描述: (331.22十一)
文件頁數(shù): 2/15頁
文件大?。?/td> 331K
代理商: 4055B
PIN CONNECTIONS
4054B
4055B
4056B
as L, P, H, A,– , and ablank position. (see typical ap-
plication for other letters). The
HCC/HCF4054B
pro-
vides level shifting similar to the
HCC/HCF4055B
and
HCC/HCF4056B
independently strobed latches,
and common DF control on 4 signal lines. The
HCC/HCF4054B
isintended to provide drive-signal
compatibility
with
the
HCC/HCF4056B
7-segment decoder types for the
decimal point,colon,polarity,andsimilardisplay lines.
A level-shifted high-amplitude DF output can be ob-
tainedfrom any
HCC/HCF4054B
outputlinebycon-
necting the corresponding input and strobe lines to
a
low
and
high
level,
HCC/HCF4054B
mayalso be utilized for logic-level
”upconversion” or”downconversion”. Forexample,
input-signal swings (V
DD
toV
SS
) from+ 5 to 0V can
be convertedtooutput-signal swings (V
DD
toV
EE
) of
+ 5 to – 5V. The level-shifted function on all three
types permits the use of different input-and output-
signal swings. The input swingsfrom a low level of
V
SS
to a high level of V
DD
while the output swings
HCC/HCF4055B
and
respectively.
The
froma lowlevelofV
EE
tothesame highlevel ofV
DD
.
Thus, the input and output swings can be selected
independently of each other over a 3-to-18V range.
V
SS
may be connected to V
EE
when no level-shift
function is required. For the
HCC/HCF 4054B
and
HCC/HCF4056B
, dataare transferred frominput to
output by placing a high voltage level at the strobe
input. Alow voltage level at the strobe input latches
the data input and the corresponding output seg-
ments remain selected (or non-selected) while the
strobe is low.Whenever the level-shifting function
is required, the
HCC/HCF4055B
can be used by it-
self to drive a liquid-crystal display (fig. 10 and fig.
12). The
HCC/HCF4056B
, however, must be used
together witha
HCC/HCF4054B
toprovide the com-
mon DF output (fig. 14). The capability of extending
the voltage swing on the negative end (this voltage
cannot be extended on the positive end) can be
used to advantage in theset-up of fig. 11. Fig. 9 is
commonto all three types.
HCC/HCF4054B/55B/56B
2/15
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