MC14543B Datasheet, PDF (1/8 Pages) ON Semiconductor – BCD-to-Seven Segment Latch/Decoder/Driver for Liquid Crystals

MC14543B
BCD-to-Seven Segment
Latch/Decoder/Driver for
Liquid Crystals
The MC14543B BCD–to–seven segment latch/decoder/driver is
designed for use with liquid crystal readouts, and is constructed with
complementary MOS (CMOS) enhancement mode devices. The
circuit provides the functions of a 4–bit storage latch and an 8421
BCD–to–seven segment decoder and driver. The device has the
capability to invert the logic levels of the output combination. The
phase (Ph), blanking (BI), and latch disable (LD) inputs are used to
reverse the truth table phase, blank the display, and store a BCD code,
respectively. For liquid crystal (LC) readouts, a square wave is applied
to the Ph input of the circuit and the electrically common backplane of
the display. The outputs of the circuit are connected directly to the
segments of the LC readout. For other types of readouts, such as
light–emitting diode (LED), incandescent, gas discharge, and
fluorescent readouts, connection diagrams are given on this data sheet.
Applications include instrument (e.g., counter, DVM etc.) display
driver, computer/calculator display driver, cockpit display driver, and
various clock, watch, and timer uses.
• Latch Storage of Code
• Blanking Input
• Readout Blanking on All Illegal Input Combinations
• Direct LED (Common Anode or Cathode) Driving Capability
• Supply Voltage Range = 3.0 V to 18 V
• Capable of Driving 2 Low–power TTL Loads, 1 Low–power Schottky
TTL Load or 2 HTL Loads Over the Rated Temperature Range
• Pin–for–Pin Replacement for CD4056A (with Pin 7 Tied to V_SS).
• Chip Complexity: 207 FETs or 52 Equivalent Gates
MAXIMUM RATINGS (Voltages Referenced to V_SS) (Note 2.)
Symbol
Parameter
Value
Unit
V_DD
DC Supply Voltage Range
– 0.5 to +18.0
V
V_in
Input Voltage Range, All Inputs – 0.5 to V_DD + 0.5
V
I_in
DC Input Current per Pin
± 10
mA
P_D
Power Dissipation,
per Package (Note 3.)
500
mW
T_A
Operating Temperature Range
– 55 to +125
°C
T_stg
Storage Temperature Range
– 65 to +150
°C
I_OHmax Maximum Continuous Output
10
mA
I_OLmax Drive Current (Source or Sink)
(per Output)
P_OHmax
P_OLmax
Maximum Continuous Output
Power (Source or Sink) ^(4.)
70
mW
(per Output)
2. Maximum Ratings are those values beyond which damage to the device
may occur.
3. Temperature Derating:
Plastic “P and D/DW” Packages: – 7.0 mW/_C From 65_C To 125_C
4. P_OHmax = I_OH (V_OH – V_DD) and P_OLmax = I_OL (V_OL – V_SS)
http://onsemi.com
PDIP–16
P SUFFIX
CASE 648
SOIC–16
D SUFFIX
CASE 751B
SOEIAJ–16
F SUFFIX
CASE 966
MARKING
DIAGRAMS
16
MC14543BCP
AWLYYWW
1
16
14543B
AWLYWW
1
16
MC14543B
AWLYWW
1
A
= Assembly Location
WL or L = Wafer Lot
YY or Y = Year
WW or W = Work Week
ORDERING INFORMATION
Device
Package
Shipping
MC14543BCP
PDIP–16
2000/Box
MC14543BD
SOIC–16
48/Rail
MC14543BDR2 SOIC–16 2500/Tape & Reel
MC14543BF
SOEIAJ–16 See Note 1.
MC14543BFEL SOEIAJ–16 See Note 1.
1. For ordering information on the EIAJ version of
the SOIC packages, please contact your local
ON Semiconductor representative.
This device contains protection circuitry to guard
against damage due to high static voltages or electric
fields. However, precautions must be taken to avoid ap-
plications of any voltage higher than maximum rated
voltages to this high–impedance circuit. For proper
v v ^{operation, Vin and Vout should be constrained to the}
range V_SS (V_in or V_out) V_DD.
Unused inputs must always be tied to an appropriate
logic voltage level (e.g., either V_SS or V_DD). Unused out-
puts must be left open.
© Semiconductor Components Industries, LLC, 2000
1
March, 2000 – Rev. 3
Publication Order Number:
MC14543B/D