PIN LIST

Pin Number

Symbol

Type

Function

41 to 44, 1 to 4

G<0:7>

I

Digital Input Channel G

5 to 12

R<0:7>

I

Digital Input Channel R

13, 28

VCC (D)

I

Digital Power Supply

14, 27

GND (D)

I

Digital Ground

15, 26

VCC (A)

I

Analog Power Supply

16

GND (A)

I

Analog R Channel Ground

18

ROUT

O

Analog Output, R Channel

19

RAUX

I

Auxiliary Analog Input, R Channel

20

GND (A)

I

Analog G Channel Ground

21

GOUT

O

Analog Output, G Channel

22

GAUX

I

Auxiliary Analog Input, G Channel

23

GND (A)

I

Analog B Channel Ground

24

BOUT

O

Analog Output, B Channel

25

BAUX

I

Auxiliary Analog Input, B Channel

29 to 36

B<0:7>

I

Digital Input Channel B

37

R/C

I

Binary or 2’s Complement Selection

38

CLK

I

Clock Input

40

COM

I

Analog Switch Selection

PIN DESCRIPTION

G<0:7> : Digital input channel G

These TTL 8-Bit input data are sampled on the

rising edge of the clock CLK. G0 is the LSB and G7

the MSB, coding is binary.

R<0:7> : Digital input channel R

These TTL 8-Bit input data are sampled on the

rising edge of the clock CLK. R0 is the LSB and R7

the MSB. Coding is binary if the R/C input is high,

coding is 2’s complement if the R/C input is low.

B<0:7> : Digital input channel B

These TTL 8-Bit input data are sampled on the

rising edge of the clock CLK. B0 is the LSB and B7

the MSB. Coding is binary if the R/C input is high,

coding is 2’s complement if the R/C input is low.

R/C : Binary/2’scomplement coding selection

This TTL input selects the coding type on R and B

channels.

R/C = 0 selects 2’s complement coding on R and B

channels.

R/C = 1 selects Binary coding on R and B channels.

RAUX : Auxiliary analog input, R channel

This analog input is connected to the output ROUT

throughthe output amplifier if the COM signal is low.

GAUX : Auxiliary analog input, G channel

This analog input is connected to the output GOUT

through the output amplifier if the COMsignal is low.

BAUX : Auxiliary analog input, B channel

This analog input is connected to the output BOUT

through the output amplifier if the COM signal is low.

ROUT : Analog output, R channel

This voltage analog output corresponds to the digi-

tal channel R if the COM signal is high or to the

auxiliary analog input RAUX it the COM signal is low.

GOUT : Analog output, G channel

This voltage analog output corresponds to the digi-

tal channel G if the COM signal is high or to the

auxiliary analog input GAUX if the COM signal is low.

BOUT : Analog output, B channel

This voltage analog output corresponds to the digi-

tal channel B if the COM signal is high or to the

auxiliary analog input BAUX if the COM signal is low.

CLK : Clock signal

The digital inputs are sampled on the rising edge of

this TTL input signal.

VCC (A) / GND (A) : Analog power supply.

VCC (D) / GND (D) : Digital power supply.

COM : Digital or analog inputs selection

This TTL input selects on the output stage the

signal from the D/A converter or the signal from the

external analog input. The three internal analog

switches are activated by the COM signal.

COM = 0 connects auxiliary analog inputs to output

amplifier.

COM = 1 connectsinternal digital channel to output

amplifier.

STV8438CV

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