TC811CKW datasheet(4/14 Pages) MICROCHIP

Part #	TC811CKW

Description	3-1/2 Digit Analog-To-Digital Converter with Hold and Differential Reference Inputs

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TC811

DS21472A

3-1/2 Digit Analog-To-Digital Converter with

Hold and Differential Reference Inputs

TC811-7 11/5/96

PIN DESCRIPTION

Pin No.

40-Pin Plastic DIP

Symbol

Description

1

HLDR

Hold pin, logic 1 holds present display reading.

2D1

Activates the D section of the units display.

3C1

Activates the C section of the units display.

4B1

Activates the B section of the units display.

5A1

Activates the A section of the units display.

6F1

Activates the F section of the units display.

7G1

Activates the G section of the units display.

8E1

Activates the E section of the units display.

9D2

Activates the D section of the tens display.

10

C2

Activates the C section of the tens display.

11

B2

Activates the B section of the tens display.

12

A2

Activates the A section of the tens display.

13

F2

Activates the F section of the tens display.

14

E2

Activates the E section of the tens display.

15

D3

Activates the D section of the hundreds display.

16

B3

Activates the B section of the hundreds display.

17

F3

Activates the F section of the hundreds display.

18

E3

Activates the E section of the hundreds display.

19

AB4

Activates both halves of the 1 in the thousands display.

20

POL

Activates the negative polarity display.

21

BP

Backplane drive output.

22

G3

Activates the G section of the hundreds display.

23

A3

Activates the A section of the hundreds display.

24

C3

Activates the C section of the hundreds display.

25

G2

Activates the G section of the tens display.

26

V–

Negative power supply voltage.

27

VINT

Integrator output, connection for CINT.

28

VBUFF

Buffer output, connection for RINT.

29

CAZ

Integrator input, connection for CAZ.

30

VIN–

Analog input low.

31

VIN

+

Analog input high.

32

COM

Analog Common: Internal zero reference.

33

V

–

REF

Reference input low.

34

C

–

REF

Negative connection for reference capacitor.

35

C

+

REF

Positive connection for reference capacitor.

36

V

+

REF

Reference input high.

37

TEST

All LCD segment test when pulled high (V+).

38

V+

Positive power supply voltage.

39

OSC2

Crystal oscillator output.

40

OSC1

Crystal oscillator input.

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