HCC4054B/55B/56B
HCF4054B/55B/56B
LIQUID-CRYSTAL DISPLAY DRIVERS
4054B 4-SEGMENT DISPLAY DRIVER -
STROBED LATCH FUNCTION
4055B BCD TO 7-SEGMENT
DECODER/DRIVER, WITH ”DIS-
PLAY-FREQUENCY” OUTPUT
4056B BCD TO 7-SEGMENT
DECODER/DRIVER WITH
STROBED LATCH FUNCTION
QUIESCENT CURRENT SPECIFIED TO 20V
FOR HCC DEVICE
OPERATION OF LIQUID CRYSTALS WITH
COS/MOS CIRCUITS PROVIDES ULTRA-
LOW-POWER DISPLAYS
EQUIVALENT AC OUTPUT DRIVE FOR LI-
QUID-CRYSTAL DISPLAYS-NO EXTERNAL
CAPACITOR REQUIRED
VOLTAGE DOUBLING ACROSS DISPLAY
[(V
DD
– V
EE
) = 18V)] RESULTS IN EFFECTIVE
36V (p-p) DRIVE ACROSS SELECTED DIS-
PLAY SEGMENTS
LOW-OR HIGH-OUTPUT LEVEL DC DRIVE
FOR OTHER TYPES OF DISPLAYS
ON-CHIP LOGIC-LEVEL CONVERSION FOR
DIFFERENT INPUT AND OUTPUT-LEVEL
SWINGS
FULL DECODING OF ALL INPUT COMBINA-
TIONS : ”0 – 9, L, H, P, A– ” AND BLANK POSI-
TIONS
INPUT CURRENT OF 100nA AT 18V AND 25°C
FOR HCC DEVICE
100% TESTED FOR QUIESCENT CURRENT
MEETS ALL REQUIREMENTS OF JEDEC TEN-
TATIVE STANDARD N°. 13A, ”STANDARD
SPECIFICATIONS FOR DESCRIPTION OF ”B”
SERIES CMOS DEVICES”
EY
(Plastic Package)
F
(Ceramic Frit Seal Package)
.
.
.
.
.
.
.
.
.
.
M1
(Micro Package)
C1
(Plastic Chip Carrier)
ORDER CODES :
HCC40XXBF
HCF40XXBM1
HCF40XXBEY
HCF40XXBC1
DESCRIPTION
The
HCC4054B, HCC4055B
and
HCC4056B
(ex-
tended temperature range) and the
HCF4054B,
HCF4055B
and
HCF4056B
(intermediate tempera-
ture range) are monolithic integrated circuits available
in 16-lead dual in-line plastic or ceramic package and
plastic micro package. The
HCC/HCF4055B
and
HCC/HCF4056B
types are single-digit BCD-to-7-seg-
ment decoder/driver circuits that provide level-shifting
functions on the chip. This feature permits the BCD
input-signal swings (V
DD
to V
SS
) to be the same as
March 1989
or different from the 7-segment output-signal swings
(V
DD
to V
EE
). For example, the BCD input-signal
swings (V
DD
to V
SS
) may be as low as 0 to – 3V,
whereas the output-display drive-signal swing (V
DD
to V
EE
) may be from 0 to – 5V. If V
DD
to V
EE
exceeds
15V, V
DD
to V
SS
should be at least 4V. The 7-seg-
ment outputs are controlled by the DISPLAY-FRE-
QUENCY (DF) input which causes the selected
segment outputs to be low, high, or a square-wave
output (for liquid-crystal displays). When the DF
input is low the output segments will be high when
selected by the BCD inputs. When the DF input is
high, the output segments will be low when selected
by the BCD inputs. When a square-wave is present
at the DF input, the selected segments will have a
square-wave output that is 180° out of phase with
the DF input. Those segments which are not se-
lected will have a square-wave output that is in
phase with the input. DF square-wave repetition
rates for liquid-crystal displays usually range from
30Hz (well above flicker rate) to 200Hz (well below
the upper limit of the liquid-crystal frequency re-
sponse). The
HCC/HCF4055B
provides a level-
shifted high-amplitude DF output which is required
for driving the common electrode in liquid-crystal
displays. The
HCC/HCF4056B
provides a strobed-
latch function at the BCD inputs. Decoding of all
input combinations on the
HCC/HCF4055B
and
HCC/HCF4056B
provides displays of 0 to 9 as well
1/15
HCC/HCF4054B/55B/56B
as L, P, H, A,– , and a blank 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
is intended to provide drive-signal
compatibility with the
HCC/HCF4055B
and
HCC/HCF4056B
7-segment decoder types for the
decimal point, colon, polarity, and similar display lines.
A level-shifted high-amplitude DF output can be ob-
tained from any
HCC/HCF4054B
output line by con-
necting the corresponding input and strobe lines to
a low and high level, respectively. The
HCC/HCF4054B
may also be utilized for logic-level
”up conversion” or ”down conversion”. Forexample,
input-signal swings (V
DD
to V
SS
) from + 5 to 0V can
be converted to output-signal swings (V
DD
to V
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 swings from a low level of
V
SS
to a high level of V
DD
while the output swings
PIN CONNECTIONS
4054B
4055B
4056B
from a low level of V
EE
to the same high level of V
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/HCF 4056B,
data are transferred from input to
output by placing a high voltage level at the strobe
input. A low 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 with a
HCC/HCF4054B
to provide 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 the set-up of fig. 11. Fig. 9 is
common to all three types.
2/15
HCC/HCF4054B/55B/56B
ABSOLUTE MAXIMUM RATINGS
Symbol
V
DD
*
V
i
I
I
P
t ot
Parameter
Supply Voltage :
HC C
Types
H C F
Types
Input Voltage
DC Input Current (any one input)
Total Power Dissipation (per package)
Dissipation per Output Transistor
for T
o p
= Full Package-temperature Range
Operating Temperature :
HCC
Types
H CF
Types
Storage Temperature
Value
– 0.5 to + 20
– 0.5 to + 18
– 0.5 to V
DD
+ 0.5
±
10
200
100
– 55 to + 125
– 40 to + 85
– 65 to + 150
Unit
V
V
V
mA
mW
mW
°C
°C
°C
T
op
T
stg
Stresses above those listed under ”Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only
and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification
is not implied. Exposure to absolute maximum rating conditions for external periods may affect device reliability.
* All voltage values are referred to V
SS
pin voltage.
RECOMMENDED OPERATING CONDITIONS
Symbol
V
DD
V
I
T
op
Parameter
Supply Voltage :
H CC
Types
H C F
Types
Input Voltage
Operating Temperature :
HCC
Types
HC F
Types
Value
3 to 18
3 to 15
0 to V
DD
– 55 to 125
– 40 to 85
Unit
V
V
V
°C
°C
TRUTH TABLE
4055 B
and
4056 B
Input Code
2
3
Data Setup Time and Strobe Pulse Duration.
Output State
Display
Character
0
1
2
3
4
5
6
7
8
9
L
H
P
A
–
BLANK
2
2
2
1
2
0
a
1
0
1
1
0
1
1
1
1
1
0
0
1
1
0
0
b
1
1
1
1
1
0
0
1
1
1
0
1
1
1
0
0
c
1
1
0
1
1
1
1
1
1
1
0
1
0
1
0
0
d
1
0
1
1
0
1
1
0
1
1
1
0
0
0
0
0
e
1
0
1
0
0
0
1
0
1
0
1
1
1
1
0
0
f
1
0
0
0
1
1
1
0
1
1
1
1
1
1
0
0
g
0
0
1
1
1
1
1
0
1
1
0
1
1
1
1
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
4/15
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