Philips hef4754v DATASHEETS
INTEGRATED CIRCUITS
DATA SH EET
For a complete data sheet, please also download:
•The IC04 LOCMOS HE4000B Logic
Family Specifications HEF, HEC
•The IC04 LOCMOS HE4000B Logic
Package Outlines/Information HEF, HEC
HEF4754V
LSI
18-element bar graph LCD driver
Product specification
File under Integrated Circuits, IC04
January 1995
Philips Semiconductors Product specification
18-element bar graph LCD driver
HEF4754V
DESCRIPTION
The HEF4754V drives an 18-element bar graph LCD in linear relation to the control voltage (Vc) in a pointer or
thermometer mode.
LSI
Fig.1 Functional diagram.
FAMILY DATA
See Family Specifications
January 1995 2
Philips Semiconductors Product specification
18-element bar graph LCD driver
PINNING
V
OSC
V
c
V
ref min
V
ref max
I
1
I
2
I
3
O
to O
1
O
R
HEF4754VP(N): 28-lead DIL; plastic
HEF4754VD(F): 28-lead DIL; ceramic (cerdip)
HEF4754VT(D): 28-lead SO; plastic
( ): Package Designator North America
oscillator terminal
control voltage input
reference voltage inputs
thermometer/pointer
(choice select input)
peak value; reset/9 or 18 bars
(choice select input)
reset; repetitively reset
(choice select input)
bar outputs
18
back plate output
(SOT117-2)
(SOT135)
(SOT136-1)
HEF4754V
LSI
FUNCTION TABLE
I1I2I3MODE
L L X pointer; 18 bars
L H X pointer; 9 bars
H L X thermometer; no peak value
H H L thermometer; peak value, repetitively
reset
H H H thermometer; peak value, manually
reset
Note
1. H = HIGH state (the more positive voltage)
2. L = LOW state (the less positive voltage)
3. X = state is immaterial
January 1995 3
Fig.2 Pinning diagram.
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