HCF4056M013TR ,LIQUID CRYSTAL DISPLAY DRIVERAbsolute Maximum Ratings are those values beyond which damage to the device may occur. Functional o ..
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HCF4060BEY ,14-STAGE RIPPLE CARRY BINARY COUNTER/DIVIDER AND OSCILLATORELECTRICAL CHARACTERISTICS (T = 25°C, C = 50pF, R = 200KΩ, t = t = 20 ns) amb L L r fTest Condit ..
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HCF4066 ,QUAD BILATERAL SWITCH FOR TRANSMISSION OR MULTIPLEXING OF ANALOG OR DIGITAL SIGNALSHCF4066BQUAD BILATERAL SWITCH FOR TRANSMISSION ORMULTIPLEXING OF ANALOG OR DIGITAL SIGNALS
HCF4056BEY-HCF4056M013TR
LIQUID CRYSTAL DISPLAY DRIVER
1/10September 2002 QUIESCENT CURRENT SPECIF. UP TO 20V OPERATION OF LIQUID CRYSTALS WITH
CMOS CIRCUITS PROVIDES ULTRA LOW
POWER DISPLAY. EQUIVALENT AC OUTPUT DRIVE FOR
LIQUID CRYSTAL DISPLAYS - NO
EXTERNAL CAPACITOR REQUIRED VOLTAGE DOUBLING ACROSS DISPLAY
[(VDD - VEE ) = 18V] RESULTS IN EFFECTIVE
36V (p-p) DRIVE ACROSS SELECTED
DISPLAY SEGMENTS LOW OR HIGH OUTPUT LEVEL DC DRIVE
FOR OTHER TYPES OF DISPLAYS ONE CHIP LOGIC LEVEL CONVERSION
FOR DIFFERENT INPUT AND OUTPUT
LEVEL SWINGS FULL DECODING OF ALL INPUT
COMBINATIONS : "0 - 9, L, H, P, A" AND
BLANK POSITIONS INPUT LEAKAGE CURRENT I = 100nA (MAX) AT VDD = 18V TA = 25°C 100% TESTED FOR QUIESCENT CURRENT MEETS ALL REQUIREMENTS OF JEDEC
JESD13B "STANDARD SPECIFICATIONS
FOR DESCRIPTION OF B SERIES CMOS
DEVICES"
DESCRIPTIONHCF4056B is a monolithic integrated circuit
fabricated in Metal Oxide Semiconductor
technology available in DIP and SOP packages.
HCF4056B is a single digit BCD to 7 segment
decoder driver circuit that provides a level shifting
function on the chip. This feature permits the BCD
input-signal swings (VDD to VSS ) to be the same
as or different from the 7-segment output signal
swings (VDD to VEE). For example, the BCD
input-signal swings (VDD to VSS ) may be as low as
0 to -3V, whereas the output-display drive signal
swing (VDD to VEE) may be from 0 to -5V. If VDD to
VEE exceeds 15V, VDD to VSS should be at least
4V. The 7-segment outputs are controlled by the
DISPLAY-FREQUENCY (DF) input, which causes
the selected segment outputs to be low, high, or a
square wave output (for liquid crystal displays).
HCF4056BBCD TO 7 SEGMENT DECODER /DRIVER
WITH STROBED LATCH FUNCTION
PIN CONNECTION
ORDER CODES
HCF4056B2/10
INPUT EQUIVALENT CIRCUIT PIN DESCRIPTION
FUNCTIONAL DIAGRAM 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 selected 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 response). HCF4056B
provides a strobed-latch function at the BCD
inputs. The decoding of all input combinations in
this device provides displays of 0 to 9 as well as L,
P, H, A, -, and a blank position. The level shifted
function permits the use of different input and
output signal swings. The input swings from a low
level of VSS to a high level of VDD, while the
outputs swing from a low level of VEE to the same
high level of VDD . Thus, the input and output
swings can be selected independently of each
other over a 3 to 18V range. VSS may be
connected to VEE when no level-shift function is
required. The HCF4056B, however must be used
together with HCF4054B to provide the common
DF output.
HCF4056B3/10
TRUTH TABLE
ABSOLUTE MAXIMUM RATINGS Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied.
All voltage values are referred to VSS pin voltage.
RECOMMENDED OPERATING CONDITIONS
HCF4056B4/10
DC SPECIFICATIONS The Noise Margin for both "1" and "0" level is: 1V min. with VDD=5V, 2V min. with VDD=10V, 2.5V min. with VDD=15V
DYNAMIC ELECTRICAL CHARACTERISTICS (T amb = 25°C, CL = 50pF, RL = 200KΩ, tr = tf = 20 ns)
(*) Typical temperature coefficient for all VDD value is 0.3 %/°C.
HCF4056B5/10
TYPICAL APPLICATIONS
FIGURE 1 : Display Driver Circuit
FIGURE 2 : Display Driver Waveforms.
HCF4056B6/10
FIGURE 3 : Conversion Of "H" Display To "F" Display Example of a circuit that converts an "H" display (code 1011) to an "F" display.
TEST CIRCUIT CL = 50pF or equivalent (includes jig and probe capacitance)
RL = 200KΩ
RT = ZOUT of pulse generator (typically 50Ω)
