ON Semiconductor MC14543B Technical data

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

• Chip Complexity: 207 FETs or 52 Equivalent Gates

MAXIMUM RATINGS (Voltages Referenced to V

Symbol

V

DD

V

I

in

P

T

T

stg

I

OHmax

I

OLmax

P

OHmax

P

OLmax

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

DC Supply Voltage Range –0.5 to +18.0 V
Input Voltage Range, All Inputs –0.5 to VDD + 0.5 V

in

DC Input Current per Pin ±10 mA
Power Dissipation,

D

Operating Temperature Range –55 to +125 °C

A

Storage Temperature Range –65 to +150 °C
Maximum Continuous Output

Drive Current (Source or Sink)
Maximum Continuous Output

= IOH (VOH – VDD) and P

Parameter Value Unit

per Package (Note 3.)

Power (Source or Sink)

(4.)

= IOL (VOL – VSS)

OLmax

) (Note 2.)

SS

500 mW

10

(per Output)

70

(per Output)

SS

mA

mW

).

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MARKING

DIAGRAMS

16

PDIP–16

P SUFFIX

CASE 648

SOIC–16

D SUFFIX

CASE 751B

SOEIAJ–16

F SUFFIX

CASE 966

A = Assembly Location
WL, L = Wafer Lot
YY, Y = Year
WW, W = Work Week

MC14543BCP

AWLYYWW

1

16

14543B

AWLYWW

1

16

MC14543B

ALYW

1

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 ap­plications of any voltage higher than maximum rated
voltages to this high–impedance circuit. For proper
operation, Vin and V
range V

logic voltage level (e.g., either V
puts must be left open.

 (Vin or V

SS

Unused inputs must always be tied to an appropriate

should be constrained to the

out

)  VDD.

out

or VDD). Unused out-

SS

 Semiconductor Components Industries, LLC, 2000

August, 2000 – Rev. 4

1 Publication Order Number:

MC14543B/D

MC14543B

PIN ASSIGNMENT

1

LD

2

C

3

B

D

4

A

PH

6

7

BI

8

V

SS

V

16

DD

15

f

g

14

e

13

d

125

11

c

10

b

9

a

TRUTH TABLE

Inputs Outputs

LD BI Ph* D C B A a b c d e f g Display

X 1 0 X X X X 0 0 0 0 0 0 0 Blank
1 0 0 00 001111110 0

1 0 0 00 010110000 1
1 0 0 00 101101101 2
1 0 0 00 111111001 3

1 0 0 01 000110011 4
1 0 0 01 011011011 5
1 0 0 01 101011111 6
1 0 0 01 111110000 7

1 0 0 10 001111111 8
1 0 0 10 011111011 9
1 0 0 1 0 1 0 0 0 0 0 0 0 0 Blank
1 0 0 1 0 1 1 0 0 0 0 0 0 0 Blank

1 0 0 1 1 0 0 0 0 0 0 0 0 0 Blank
1 0 0 1 1 0 1 0 0 0 0 0 0 0 Blank
1 0 0 1 1 1 0 0 0 0 0 0 0 0 Blank
1 0 0 1 1 1 1 0 0 0 0 0 0 0 Blank

000XXXX ** **
† † † † Inverse of Output Display

X = Don’t care
† = Above Combinations
* = For liquid crystal readouts, apply a square wave to Ph

For common cathode LED readouts, select Ph = 0
For common anode LED readouts, select Ph = 1

** = Depends upon the BCD code previously applied when LD = 1

Combinations as above

Above

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MC14543B

V

DD

ELECTRICAL CHARACTERISTICS (Voltages Referenced to V

V

DD

Characteristic Symbol

Output Voltage “0” Level

V

= VDD or 0

in

V

OL

Vdc

5.0
10
15

V

= 0 or V

in

“1” Level

DD

V

OH

5.0
10
15

Input Voltage “0” Level

(V

= 4.5 or 0.5 Vdc)

O

= 9.0 or 1.0 Vdc)

(V

O

(V

= 13.5 or 1.5 Vdc)

O

“1” Level

(V

= 0.5 or 4.5 Vdc)

O

(V

= 1.0 or 9.0 Vdc)

O

(V

= 1.5 or 13.5 Vdc)

O

Output Drive Current

(V

= 2.5 Vdc) Source

OH

= 4.6 Vdc)

(V

OH

(V

= 0.5 Vdc)

OH

(V

= 9.5 Vdc)

OH

(V

= 13.5 Vdc)

OH

(VOL = 0.4 Vdc) Sink
(V

= 0.5 Vdc)

OL

= 9.5 Vdc)

(V

OL

(V

= 1.5 Vdc)

OL

Input Current I
Input Capacitance C
Quiescent Current

(Per Package) V

= 0 µA

I

out

Total Supply Current

= 0 or VDD,

in

(6.) (7.)

(Dynamic plus Quiescent,
Per Package)

= 50 pF on all outputs, all

(C

L

V

IL

5.0
10
15

V

IH

5.0
10
15

I

OH

5.0

5.0
10
10
15

I

OL

5.0
10
10
15

in

in

I

DD

15 — ±0.1 — ±0.00001 ±0.1 — ±1.0 µAdc
— — — — 5.0 7.5 — — pF

5.0
10
15

I

T

5.0
10
15

buffers switching)

5. Noise immunity specified for worst–case input combination.
Noise Margin for both “1” and “0” level = 1.0 V min @ V

= 2.0 V min @ V
= 2.5 V min @ V

6. To calculate total supply current at loads other than 50 pF:

IT(CL) = IT(50 pF) + 3.5 x 10–3 (CL – 50) VDDf

where: I

is in µA (per package), CL in pF, VDD in V, and f in kHz is input frequency.

T

7. The formulas given are for the typical characteristics only at 25C.

– 55C 25C 125C

Min Max Min Typ

—
—
—

4.95

9.95

14.95

—
—
—

3.5

7.0
11

– 3.0

– 0.64

—

– 1.6
– 4.2

0.64

1.6
—

4.2

—
—
—

= 5.0 V

DD

= 10 V

DD

= 15 V

DD

SS

)

0.05

0.05

0.05
—

—
—

1.5

3.0

4.0

—
—
—

—
—
—
—
—

—
—
—
—

5.0
10
20

(5.)

—
—
—

4.95

9.95

14.95

—
—
—

3.5

7.0
11

– 2.4

– 0.51

—

– 1.3
– 3.4

0.51

1.3
—

3.4

—
—
—

0
0
0

5.0
10
15

2.25

4.50

6.75

2.75

5.50

8.25

– 4.2
– 0.88
– 10.1
– 2.25

– 8.8

0.88

2.25

10.1

8.8

0.005

0.010

0.015

IT = (1.6 µA/kHz) f + I
IT = (3.1 µA/kHz) f + I
IT = (4.7 µA/kHz) f + I

Max Min Max

0.05

0.05

0.05
—

—
—

1.5

3.0

4.0

—
—
—

—
—
—
—
—

—
—
—
—

5.0
10
20

DD
DD
DD

—
—
—

4.95

9.95

14.95

—
—
—

3.5

7.0
11

– 1.7

– 0.36

—

– 0.9
– 2.4

0.36

0.9
—

2.4

—
—
—

0.05

0.05

0.05
—

—
—

1.5

3.0

4.0

—
—
—

—
—
—
—

—
—
—

150
300
600

Unit

Vdc

Vdc

Vdc

Vdc

mAdc

mAdc

µAdc

µAdc

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