TC7129 View Datasheet(PDF) - TelCom Semiconductor Inc => Microchip

Part Name

Description

Manufacturer

TC7129

4-1/2 DIGIT ANALOG-TO-DIGITAL CONVERTER WITH ON-CHIP LCD DRIVERS

TelCom Semiconductor Inc => Microchip 

4-1/2 DIGIT ANALOG-TO-DIGITAL

CONVERTER WITH ON-CHIP LCD DRIVERS

TC7129

PIN DESCRIPTIONS

Pin No.

40-Pin

TC7129CPL

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

Pin No.

44-Pin

TC7129CKW

40

41

43

44

1

2

3

4

5

7

8

9

10

11

12

13

14

15

16

Pin No.

44-Pin

TC7129CLW Symbol

2

OSC1

3

OSC3

ANNUNCIATOR

5

B1, C1, CONT

6

A1, G1, D1

7

F1, E1, DP1

8

B2, C2, LO BATT

9

A2, G2, D2

10

F2, E2, DP2

11

B3, C3, MINUS

13

A3, G3, D3

14

F3, E3, DP3

15

B4, C4, BC5

16

A4, D4, G4

17

F4, E4, DP4

18

BP3

19

BP2

20

BP1

21

VDISP

22

DP4/OR

21

18

24

DP3/UR

22

19

25

LATCH/HOLD

23

24

25

26

27

28

29

30

31

32

33

3-234

20

26

V–

27

V+

21

28

INT IN

23

29

INT OUT

24

30

CONTINUITY

25

31

COMMON

26

32

C+REF

27

33

C–REF

29

35

BUFFER

30

36

IN LO

31

37

IN HI

Function

Input to first clock inverter.

Output of second clock inverter.

Backplane square-wave output for driving annunciators.

Output to display segments.

Output to display segments.

Output to display segments.

Output to display segments.

Output to display segments.

Output to display segments.

Output to display segments.

Output to display segments.

Output to display segments.

Output to display segments.

Output to display segments.

Output to display segments.

Backplane #3 output to display.

Backplane #2 output to display.

Backplane #1 output to display.

Negative rail for display drivers.

Input: When HI, turns on most significant decimal point.

Output: Pulled HI when result count exceeds ±19,999.

Input: Second most significant decimal point on when HI.

Output: Pulled HI when result count is less than ±1000.

Input: When floating, ADC operates in the free-run mode.

When pulled HI, the last displayed reading is held. When

pulled LO, the result counter contents aren shown

inincrementing during the deintegrate phase of cycle.

Output: Negative-going edge occurs when the data latches

are updated. Can be used for converter status signal.

Negative power supply terminal.

Positive power supply terminal and positive rail for display

drivers.

Input to integrator amplifier.

Output of integrator amplifier.

Input: When LO, continuity flag on the display is OFF.

When HI, continuity flag is ON.

Output: HI when voltage between inputs is less than +200

mV. LO when voltage between inputs is more than +200

mV.

Sets common-mode voltage of 3.2V below V+ for DE,

10X, etc. Can be used as preregulator for external

reference.

Positive side of external reference capacitor.

Negative side of external reference capacitor.

Output of buffer amplifier.

Negative input voltage terminal.

Positive input voltage terminal.

TELCOM SEMICONDUCTOR, INC.

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