HCF4056B
BCD TO 7 SEGMENT DECODER /DRIVER
WITH STROBED LATCH FUNCTION
■ QUIESCENT CURRENT SPECIF. UP TO 20V
■ OPERATION OF LIQUID CR YSTAL S WITH
CMOS CIRCUITS PROVIDES ULTRA LOW
POWER DISPLAY.
■ EQUIVALENT AC OUTPUT DRIVE FOR
LIQUID CRYSTAL DISPLAYS - NO
EXTERNAL CAPACITOR REQUIRED
■ VOLTAGE DOUBLING ACROSS DISPLAY
[(V
- VEE) = 18V] RESU LT S IN EFFECTIVE
DD
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
I
■ 100% TESTED FOR QUIESCENT CURRENT
■ MEETS ALL REQUIREMENTS OF JEDEC
JESD13B "STANDARD SPECIFICATIONS
FOR DESCRIPTI ON OF B SERI ES CMOS
DEVICES"
DESCRIPTION
HCF4056B is a monolithic integrated circuit
fabricated in Metal Oxide Semiconductor
technology available in DIP and SOP packages.
DIP SOP
ORDER CODES
PACKAGE TUBE T & R
DIP HCF4056BEY
SOP HCF4056BM1 HCF4056M013TR
HCF4056B is a single digit BCD to 7 segment
decoder driver circuit that provides a leve l shifting
function on the chip. This feature permits the BCD
input-signal swings (V
to VSS) to be th e same
DD
as or different from the 7-s egment output signal
swings (V
input-signal swings (V
to VEE). For example, the BCD
DD
to VSS) may be as low as
DD
0 to -3V, whereas the output-display drive signa l
swing (V
V
exceeds 15V, VDD to VSS should be at least
EE
to VEE) may be from 0 to -5V . If VDD to
DD
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).
PIN CONNECTION
1/10September 2002
HCF4056B
When the DF input is low, the output segments will
be high when select ed by the BCD inp uts. 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 crys tal
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 dec oding of all input combinat ions 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 V
to a high level of V
SS
outputs swing from a low level of V
high level of V
. Thus, the input and output
DD
swings can be selected independently of each
other over a 3 to 18V range. V
con nected to V
when no level-shift function is
EE
required. The HCF4056B, however m ust be used
together with HCF4054B to provide the common
DF output.
INPUT EQUIVALENT CIRCUIT PIN DESCRIPTION
PIN No SYMBOL NAME AND FUNCTION
5, 3, 2, 4
9, 10, 11, 12,
13, 15, 14
6
1 STROBE Strobe Input
7
8
16
0
2
, 21, 22, 2
a to g 7 - Segments Outputs
DISPLAY
FREQ. IN
V
EE
V
SS
V
DD
while the
DD,
to the same
EE
may be
SS
3
BCD Inputs
Display Frequency Input
Negative Supply Voltage
Negative Supply Voltage
Positive Supply Voltage
FUNCTIONAL DIAGRAM
2/10
TRUTH TABLE
HCF4056B
INPUT CODE OUTPUT STATE
3
2
2
2
1
2
0
2
abcdefg
DISPLAY
CHARACTER
LL LLHHHHHHL 0
LLLHLHHLLLL 1
LLHLHHLHHLH 2
LLHHHHHHLLH 3
LHLLLHHLLHH 4
LHLHHLHHLHH 5
LHHLHLHHHHH 6
LHHHHHHLLLL 7
HL LLHHHHHHH 8
HL LHHHHHLHH 9
HLHLLLLHHHL L
HLHHLHHLHHH H
HHL LHHLLHHH P
HHLHHHHLHHH A
HHHLLLLLLLH H H H H L L L L L L L BLANK
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
V
P
T
T
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied.
All voltage value s are referred to V
Supply Voltage
DD
DC Input Voltage -0.5 to VDD + 0.5
I
I
DC Input Current
I
Power Dissipation per Package 200 mW
D
-0.5 to +22 V
10 mA
±
Power Dissipation per Output Transistor 100 mW
Operating Temperature
op
Storage Temperature
stg
pin voltage.
SS
-55 to +125 °C
-65 to +150 °C
V
RECOMMENDED OPERATING CONDITIONS
Symbol Parameter Value Unit
V
V
T
Supply Voltage
DD
Input Voltage 0 to V
I
Operating Temperature
op
3 to 20 V
DD
-55 to 125 °C
V
3/10
HCF4056B
DC SPECIFICATIONS
Test Condition Value
T
Symbol Parameter
I
Quiescent Current -5 0/5 0 5 0.04 5 150 150
L
V
(V)
EE
V
V
(V)
SS
V
DD
(V)
V
I
(V)
O
(V)
= 25°C
A
Min. Typ. Max. Min. Max. Min. Max.
0 0/10 0 10 0.04 10 300 300
0 0/15 0 15 0.04 20 600 600
0 0/20 0 20 0.08 100 3000 3000
High Level Output
V
OH
Voltage
0 0/5 0 5 4.95 4.95 4.95
0 0/15 0 15 14.95 14.95 14.95
Low Level Output
V
OL
Voltage
0 5/0 0 5 0.05 0.05 0.05
0 15/0 0 15 0.05 0.05 0.05
High Level Input
V
IH
Voltage
-5 0.5/4.5 0 5 3.5 3.5 3.5
0 1.5/18.5 0 15 11 11 11
Low Level Input
V
IL
Voltage
5 0.5/4.5 0 5 1.5 1.5 1.5
0 1.5/18.5 0 15 4 4 4
I
OH
Output Drive
Current
-5 0/5 4.5 0 5 -0.38 -0.9 -0.28 -0.28
0 0/15 13.5 0 15 -1.27 -3 -0.95 -0.95
I
OL
Output Sink
Current
-5 0/5 0.4 0 5 1.1 2.6 0.82 0.82
0 0/15 1.5 0 15 2.9 6.8 2.17 2.17
Input Leakage
I
I
Current (any input)
C
Input Capacitance
I
(any input)
The Noi se Margin for both "1" a nd "0" level is: 1V min. wit h VDD=5V, 2V min. with VDD=10V, 2.5V min. with VDD=15V
0 0/18 0 18
-5
10
±
5 7.5 pF
-40 to 85°C -55 to 125°C
0.1
±
1
±
Unit
±1µ
A
µ
V0 0/10 0 10 9.95 9.95 9.95
V0 10/0 0 10 0.05 0.05 0.05
V01/90107 7 7
V09/1010 3 3 3
mA0 0/10 9.5 0 10 -0.38 -0.9 -0.28 -0.28
mA0 0/10 0.5 0 10 1.1 2.6 0.82 0.82
A
DYNAMIC ELECTRICAL CHARACTERISTICS (T
Test Condition Value (*) Unit
Symbol Parameter
t
PHL tPLH
Propagation Delay
Time (any Input to
any Output)
t
THL tTLH
(*) Typical temper at ure coeffic i ent for all VDD value is 0.3 %/°C.
Transition Time
(any Output)
4/10
V
EE
(V)
V
(V)
SS
V
(V)
-5 0 5 650 1300
0 0 15 375 750
-5 0 5 100 200
0 0 15 75 150
= 25°C, CL = 50pF, RL = 200KΩ, tr = tf = 20 ns)
amb
DD
Min. Typ. Max.
ns0 0 10 575 1150
ns0 0 10 100 200
TYPICAL APPLICATIONS
FIGURE 1 : Display Driver Circuit
HCF4056B
FIGURE 2 : Display Driver Waveforms.
5/10
HCF4056B
FIGURE 3 : Conversion Of "H" Display To "F" Display
Examp l e of a ci rcuit that converts an " H" di splay (code 1011) to an "F" displa y.
TEST CIRCUIT
CL = 50pF or equivalent (in cl udes jig and probe capac i tance)
R
= 200K
Ω
L
R
= Z
of pulse generator (typically 50Ω)
T
OUT
6/10
HCF4056B
WAVEFORM : DATA SETUP TIME AND STROBE PULSE DURATION (f=1MHz; 50% duty cycle )
7/10
HCF4056B
Plastic DIP-16 (0.25) MECHANICAL DATA
mm. inch
DIM.
MIN. TYP MAX. MIN. TYP. MAX.
a1 0.51 0.020
B 0.77 1.65 0.030 0.065
b 0.5 0.020
b1 0.25 0.010
D 20 0.787
E 8.5 0.335
e 2.54 0.100
e3 17.78 0.700
F 7.1 0.280
I 5.1 0.201
L 3.3 0.130
Z 1.27 0.050
8/10
P001C
SO-16 MECHANICAL DATA
HCF4056B
DIM.
A 1.75 0.068
a1 0.1 0.2 0.003 0.007
a2 1.65 0.064
b 0.35 0.46 0.013 0.018
b1 0.19 0.25 0.007 0.010
C 0.5 0.019
c1 45˚ (typ.)
D 9.8 10 0.385 0.393
E 5.8 6.2 0.228 0.244
e 1.27 0.050
e3 8.89 0.350
F 3.8 4.0 0.149 0.157
G 4.6 5.3 0.181 0.208
L 0.5 1.27 0.019 0.050
M 0.62 0.024
S ˚ (max.)
MIN. TYP MAX. MIN. TYP. MAX.
mm. inch
8
PO13H
9/10
HCF4056B
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibi lity f or the
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibi lity f or the
consequences of use of such informatio n nor for any infringement of paten ts or o ther rig hts of t hird part ies which ma y result from
consequences of use of such informatio n nor for any infringement of paten ts or o ther rig hts of t hird part ies which ma y result from
its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications
its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications
mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information
mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information
previousl y suppl ied. STM icroel ectronics produc ts are not auth orized for use as c ritica l compone nts in l ife s upport dev ices or
previousl y suppl ied. STM icroel ectronics produc ts are not auth orized for use as c ritica l compone nts in l ife s upport dev ices or
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