Datasheet HEF4543BT, HEF4543BPB, HEF4543BP, HEF4543BDB, HEF4543BD Datasheet (Philips)

DATA SH EET

Product specification
File under Integrated Circuits, IC04

January 1995

INTEGRATED CIRCUITS

HEF4543B
MSI

BCD to 7-segment
latch/decoder/driver

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

January 1995 2

Philips Semiconductors Product specification

BCD to 7-segment latch/decoder/driver

HEF4543B

MSI

DESCRIPTION

The HEF4543B is a BCD to 7-segment
latch/decoder/driver for liquid crystal and LED displays. It
has four address inputs (DAto DD), an active HIGH latch
disable input (LD), an active HIGH blanking input (BI), an
active HIGH phase input (PH) and seven buffered
segment outputs (Oato Og).

The circuit provides the function of a 4-bit storage latch
and an 8-4-2-1 BCD to 7-segment decoder/driver. It can
invert the logic levels of the output combination. The phase
(PH), blanking (BI) and latch disable (LD) inputs are used
to reverse the function table phase, blank the display and
store a BCD code, respectively.

For liquid crystal displays a square-wave is applied to PH
and the electrical common back-plane of the display. The
outputs of the device are directly connected to the
segments of the liquid crystal.

Fig.1 Functional diagram.

HEF4543BP(N): 16-lead DIL; plastic (SOT38-1)
HEF4543BD(F): 16-lead DIL; ceramic (cerdip) ( SOT74)
HEF4543BT(D): 16-lead SO; plastic (SOT109-1)
( ): Package Designator North America

Fig.2 Pinning diagram.

PINNING

D

A

to D

D

address (data) inputs
PH phase input (active HIGH)
BI blanking input (active HIGH)
LD latch disable input (active HIGH)
O

a

to O

g

segment outputs

FAMILY DATA, I

DD

LIMITS category MSI

See Family Specifications

Fig.3 Segment designation.

January 1995 3

Philips Semiconductors Product specification

BCD to 7-segment latch/decoder/driver

HEF4543B

MSI

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Fig.4 Logic diagram.

January 1995 4

Philips Semiconductors Product specification

BCD to 7-segment latch/decoder/driver

HEF4543B

MSI

FUNCTION TABLE

Notes

1. H = HIGH state (the more positive voltage)

2. L = LOW state (the less positive voltage)

3. X = state is immaterial

4. For liquid crystal displays, apply a square-wave to PH.
For common cathode LED displays, select PH = LOW.
For common anode LED displays, select PH = HIGH.

5. Depends upon the BCD-code previously applied when LD = HIGH.

INPUTS OUTPUTS

LD BI PH

(4)

D

D

D

C

D

B

D

A

O

a

O

b

O

c

O

d

O

e

O

f

OgDISPLAY

X H L X X X X L L L L L L L blank
HLL LL L LHHHHHHL 0
HLLLLLHLHHLLLL 1
HLLLLHLHHLHHLH 2
HL L L L H H H H H H L L H 3
HLLLHLLLHHLLHH 4
HLLLHLHHLHHLHH 5
HLL LHHLHL HHHHH 6
HLLLHHHHHHLLLL 7
HLL HL L LHHHHHHH 8
HL L H L L H H H H H L HH 9
H L L H L H L L L L L L L L blank
H L L H L H H L L L L L L L blank
H L L H H L L L L L L L L L blank
H L L H H L H L L L L L L L blank
H L L H H H L L L L L L L L blank
H L L H H H H L L L L L L L blank

LL L X X X X

(5) (5)

as above H as above inverse of above as above

Fig.5 Display.

January 1995 5

Philips Semiconductors Product specification

BCD to 7-segment latch/decoder/driver

HEF4543B

MSI

AC CHARACTERISTICS

V

SS

= 0 V; T

amb

=25°C; CL= 50 pF; input transition times ≤ 20 ns

V

DD

V

SYMBOL MIN. TYP. MAX.

TYPICAL EXTRAPOLATION

FORMULA

Propagation delays

Dn→ O

n

5 180 360 ns 153 ns + (0,55 ns/pF) C

L

HIGH to LOW 10 t

PHL

75 150 ns 64 ns + (0,23 ns/pF) C

L

15 55 110 ns 47 ns + (0,16 ns/pF) C

L

5 180 360 ns 153 ns + (0,55 ns/pF) C

L

LOW to HIGH 10 t

PLH

75 150 ns 64 ns + (0,23 ns/pF) C

L

15 55 110 ns 47 ns + (0,16 ns/pF) C

L

LD → O

n

5 170 340 ns 143 ns + (0,55 ns/pF) C

L

HIGH to LOW 10 t

PHL

80 160 ns 69 ns + (0,23 ns/pF) C

L

15 60 120 ns 52 ns + (0,16 ns/pF) C

L

5 190 380 ns 163 ns + (0,55 ns/pF) C

L

LOW to HIGH 10 t

PLH

80 160 ns 69 ns + (0,23 ns/pF) C

L

15 60 120 ns 52 ns + (0,16 ns/pF) C

L

BI → O

n

5 145 290 ns 118 ns + (0,55 ns/pF) C

L

HIGH to LOW 10 t

PHL

65 130 ns 54 ns + (0,23 ns/pF) C

L

15 45 90 ns 37 ns + (0,16 ns/pF) C

L

5 125 250 ns 98 ns + (0,55 ns/pF) C

L

LOW to HIGH 10 t

PLH

55 110 ns 54 ns + (0,23 ns/pF) C

L

15 40 80 ns 32 ns + (0,16 ns/pF) C

L

Output transition times 5 60 120 ns 10 ns + (1,0 ns/pF) C

L

HIGH to LOW 10 t

THL

30 60 ns 9 ns + (0,42 ns/pF) C

L

15 20 40 ns 6 ns + (0,28 ns/pF) C

L

5 60 120 ns 10 ns + (1,0 ns/pF) C

L

LOW to HIGH 10 t

TLH

30 60 ns 9 ns + (0,42 ns/pF) C

L

15 20 40 ns 6 ns + (0,28 ns/pF) C

L

Minimum LD 5 60 30 ns

pulse width; HIGH 10 t

WLDH

30 15 ns

15 20 10 ns

Set-up time 5 40 20 ns

D

n

→ LD 10 t

su

20 5 ns

15 15 0 ns

Hold time 5 0 −15 ns

D

n

→ LD 10 t

hold

15 0 ns

15 20 5 ns

January 1995 6

Philips Semiconductors Product specification

BCD to 7-segment latch/decoder/driver

HEF4543B

MSI

APPLICATION INFORMATION

Some examples of applications for the HEF4543B are:

• Driving LCD displays.

• Driving LED displays.

• Driving fluorescent displays.

• Driving incandescent displays.

• Driving gas discharge displays.

V

DD

V

TYPICAL FORMULA FOR P (µW)

Dynamic power 5 2 200 f

i

+∑(foCL) × V

DD

2

where

dissipation per 10 10 400 f

i

+∑(foCL) × V

DD

2

fi= input freq. (MHz)

package (P) 15 33 000 f

i

+∑(foCL) × V

DD

2

fo= output freq. (MHz)
C

L

= load capacitance (pF)

∑ (f

oCL

) = sum of outputs

V

DD

= supply voltage (V)

Fig.6 Connection to common cathode LED display readout.

January 1995 7

Philips Semiconductors Product specification

BCD to 7-segment latch/decoder/driver

HEF4543B

MSI

Note to Figs 6 and 7: bipolar transistors may be added for gain where VDD≤ 10 V or I

out

≥ 10 mA.

Fig.7 Connection to common anode LED display readout.

Fig.8 Connection to liquid crystal (LCD) display readout.

January 1995 8

Philips Semiconductors Product specification

BCD to 7-segment latch/decoder/driver

HEF4543B

MSI

Fig.9 Connection to incandescent display readout.

Fig.10 Connection to gas discharge display readout.

Fig.11 Connection to fluorescent display readout.