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HCF4054 Datasheet

  • HCF4054

  • LIQUID-CRYSTAL DISPLAY DRIVERS

  • 291.36KB

  • STMicroelectronics

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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 鈥滵IS-
PLAY-FREQUENCY鈥?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
鈥?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 : 鈥? 鈥?9, L, H, P, A鈥?鈥?AND BLANK POSI-
TIONS
INPUT CURRENT OF 100nA AT 18V AND 25掳C
FOR HCC DEVICE
100% TESTED FOR QUIESCENT CURRENT
MEETS ALL REQUIREMENTS OF JEDEC TEN-
TATIVE STANDARD N掳. 13A, 鈥漇TANDARD
SPECIFICATIONS FOR DESCRIPTION OF 鈥滲鈥?/div>
SERIES CMOS DEVICES鈥?/div>
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 鈥?3V,
whereas the output-display drive-signal swing (V
DD
to V
EE
) may be from 0 to 鈥?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掳 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

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