HCF4054BF

Manufacturer Part NumberHCF4054BF
DescriptionSTMicroelectronics [LIQUID-CRYSTAL DISPLAY DRIVERS]
ManufacturerSTMicroelectronics
HCF4054BF datasheet
 


1
Page 1
2
Page 2
3
Page 3
4
Page 4
5
Page 5
6
Page 6
7
Page 7
8
Page 8
9
Page 9
10
Page 10
11
12
13
14
15
Page 1/15

Download datasheet (335Kb)Embed
Next
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
– V
) = 18V)] RESULTS IN EFFECTIVE
DD
EE
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”
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
to V
) to be the same as
DD
SS
March 1989
HCC4054B/55B/56B
HCF4054B/55B/56B
LIQUID-CRYSTAL DISPLAY DRIVERS
EY
(Plastic Package)
M1
(Micro Package)
ORDER CODES :
HCC40XXBF
HCF40XXBEY
or different from the 7-segment output-signal swings
(V
to V
). For example, the BCD input-signal
DD
EE
swings (V
to V
) may be as low as 0 to – 3V,
DD
SS
whereas the output-display drive-signal swing (V
to V
) may be from 0 to – 5V. If V
EE
15V, V
to V
should be at least 4V. The 7-seg-
DD
SS
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
F
(Ceramic Frit Seal Package)
C1
(Plastic Chip Carrier)
HCF40XXBM1
HCF40XXBC1
DD
to V
exceeds
DD
EE
1/15

HCF4054BF Summary of contents