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Texas Instruments DIS115E Twelve-Digit Calculator LED Display

Features

These Twelve-Digit Calculator Numeric Seven-Segment LED Displays are intended for use under pulsed conditions by enabling the common cathode of each digit sequentially and enabling the desired Segment and Decimal Point anodes in phase with the character enabling pulse. The pulse rate is kept high enough so that light from each character appears to the eye to be constant. The "G" segment of Digit 3 is accessible on a separate terminal to allow its use as the minus sign of the Exponent for scientific calculators based on the TMS0100 family of single-chip calculator circuits.

The DIS115 Twelve-Digit display assembly consists of a printed circuit board (PCB) with 12 individual DIS279 Seven-Segment displays and succeeds the CP-200032 Display-PCB introduced with the SR-10 Version 1 and based on the TIL360 Multi-Digit displays. While the DIS115 maintains the mechanical dimensions of the CP-200032, improves its increased spacing between the DIS279 elements and the integrated magnifying lens the readability of the 0.10/2.54 mm characters significantly. The DIS115E was soon replaced with the DIS115F with 12 individual DISXXX Seven-Segment displays.

0.1/2.54 mm Characters
Seven-Segment Digits with Right-Hand Decimals
Continuous Uniform Segments
Wide Viewing Angle
Common-Cathode Configuration for Multiplex Applications
0.185/4.7 mm Character Spacing
Integrated Clear Plastic Lens

Family Members and Applications

Type Products Digits Comments
DIS115E SR-11 Version 1 Segment G
Digit 3

 

Genealogy

Type Products Relationship Comments
DIS288 SR-50  Relative  Uses 14*DIS279
DIS134B TI-2550 (Italy)  Relative  Uses 9*DIS279
DIS115F SR-10 Version 1, Display 2, SR-10 Version 2, SR-10 Version 3, SR-11 Version 1, Display 2  Successor  Uses 12*DISXXX

 

Technical Specifications

Item Min Typ Max Unit Comments
Display
Width
  2.65
67.5
  inch
mm
  
Display
Height
  0.87
22.0
  inch
mm
  
Display
Depth
  0.26
6.7
  inch
mm
 Including Printed Circuit Board,
 without Pins
PCB
Thickness
  0.03
0.8
  inch
mm
  
Lens
Width
  2.50
63.5
  inch
mm
  
Lens
Height
  0.36
9.2
  inch
mm
  
Lens
Depth
  0.23
5.9
  inch
mm
 
Character
Height
  0.100
2.54
  inch
mm
 At 0.4" / 10 mm Viewing Distance
 w/o lens 0.080" / 2.00 mm
Character
Width
  0.070
1.78
  inch
mm
 w/o Decimal Point
 w/o lens 0.055" / 1.42 mm
Character
Slant Angle
  10   degrees   
Character
Spacing
  0.185
4.70
  inch
mm
 

Technology

The displays are formed by soldering twelve individual DIS279 Seven-Segment displays on a double-sided printed circuit board (PCB) and placing a one-piece acrylic magnifying lens with cylindrical shape on top of the assembly with two heat stakes.

Packaging

The DIS115E uses a 2.65" / 67.5 mm by 0.87 / 22.0 mm rectangular printed circuit board (PCB) with 21 solder tabs with a 0.1 / 2.54 mm pitch arranged on the bottom of the display module.

Pin Configuration

Pin Pol. Function
1 A G Segment Digit 3 (H)
2 A G Segments Digits 1-2, 4-12
3 A C Segments
4 A D Segments
5 C Digit 11 (MSD Mantissa)
6 C Digit 12 (Minus Sign)
7 C Digit 10
8 C Digit 9
9 C Digit 8
10 A A Segments
11 C Digit 3 (Minus Sign Exp.)
12 A B Segments
13 C Digit 6
14 C Digit 7
15 C Digit 5
16 A Decimal Points
17 C Digit 4 (LSD Mantissa)
18 C Digit 2 (MSD Exponent)
19 C Digit 1 (LSD Exponent)
20 C E Segments
21 C F Segments
The Anode of the Segments A-G, Segment G (H) for minus sign of the Exponent and Right-Hand Decimals and the Cathode of the Digits 1-12 are connected to the display in the pictured way. 
horizontal rule

If you have additions to the above datasheet please email: joerg@datamath.org.

Joerg Woerner, December 22, 2021. No reprints without written permission.