LS7031 datasheet(4/4 Pages) LSI

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4 8

BCD

COUNTER

BCD

COUNTER

2 4

BCD

COUNTER

1 2

BCD

COUNTER

BCD

COUNTER

1 2

4 8

BCD

COUNTER

4 BIT

LATCH

4 BIT

LATCH

4 BIT

LATCH

4 BIT

LATCH

4 BIT

LATCH

4 BIT

LATCH

4 BIT

LATCH

4 BIT

LATCH

1 2 4 8

MUX

GATE

DATA

OUTPUT

BUFFER

D6 OUTPUT

D7 OUTPUT

D8 OUTPUT

OVFLW

F/F

OVERFLOW

INPUT

1 BIT

LATCH

BCD

DATA

OUTPUT

BLANK OUT

Vss

VGG

VDD

OVERFLOW

OUTPUT

BLANKING

F/F

8 DIGIT STROBE OUTPUTS

OUTPUT

BUFFERS

8 STATE STATIC SCAN

COUNTER & DECODED

LSD

MSD

OSCILLATOR

BUFFER

SCAN RESET INPUT

(RESET TO MSD)

FIGURE 4. LS7031 BLOCK DIAGRAM

OSC. INPUT

SCAN INPUT

RESET

INPUT

LOAD

LATCH

INPUT

1 2 4 8

MUX

GATE

1 2 4 8

MUX

GATE

1 2 4 8

MUX

GATE

1 2 4 8

MUX

GATE

1 2 4 8

MUX

GATE

1 2 4 8

MUX

GATE

1 2 4 8

MUX

GATE

LSD

MSD

DECIMAL POINT

INPUT

B1 B2 B4 B8

DIGIT ONE

DIGIT TWO

31 30 29 28

37 36 34 33

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