TIL311

HEXADECIMAL DISPLAY WITH LOGIC

TAOS058 − JANUARY 2004

2

r

r

Copyright

E 2006, TAOS Inc.

The

LUMENOLOGY

r Company

www.taosinc.com

Terminal Functions

TERMINAL

TYPE

DESCRIPTION

NAME

NO.

TYPE

DESCRIPTION

Blanking Input

8

I

Blanking Input. When high, the display is blanked regardless of the levels of the other inputs. When low,

a character is displayed as determined by the data in the latches. The blanking input may be pulsed for

intensity modulation.

Data Input A

3

I

Latch Data Input A. Data on this input is entered into the latch when the Latch Strobe Input is low. The

binary weight of this input is 1.

Data Input B

2

I

Latch Data Input B. Data on this input is entered into the latch when the Latch Strobe Input is low. The

binary weight of this input is 2.

Data Input C

13

I

Latch Data Input C. Data on this input is entered into the latch when the Latch Strobe Input is low. The

binary weight of this input is 4.

Data Input D

12

I

Latch Data Input D. Data on this input is entered into the latch when the Latch Strobe Input is low. The

binary weight of this input is 8.

Ground

7

Common Ground. This is the negative terminal for all logic and LED currents except for the decimal points.

LED Supply

1

Left Decimal

4

Left Decimal Point Cathode. This LED is not connected to the logic chip. If a decimal point is used, an

external resistor or other current-limiting mechanism must be connected in series with it.

Logic Supply

14

omitted

6, 9, 11

There is no pin at this location.

Right Decimal

10

Right Decimal Point Cathode. This LED is not connected to the logic chip. If a decimal point is used, an

external resistor or other current-limiting mechanism must be connected in series with it.

Strobe Input

5

I

Latch Strobe Input. When low, the data in the latches follow the data on the latch data inputs. When high,

the data in the latches does not change. If the display is blanked and then restored while this input is high,

the previously displayed character will again be displayed.

7 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.5 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Decimal point current

20 mA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

0

°C to 85°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

−25

°C to 85°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not

implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTES: 1. All voltages are with respect to the Common Ground terminal.

2. Case temperature is the surface temperature of the plastic measured directly over the integrated circuit. Forced-air cooling may be

required to maintain this temperature.

Recommended Operating Conditions

MIN

NOM

MAX

UNIT

4.5

5

5.5

V

4

5

5.5

V

5

mA

40

ns

50

ns

40

ns