DATAMATH  CALCULATOR  MUSEUM

Texas Instruments DIS134B Nine-Digit Calculator LED Display

Features

These Nine-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 DIS134B Nine-Digit display assembly consists of a printed circuit board (PCB) with 9 individual DIS279 Seven-Segment displays and was introduced to replace the earlier display assemblies based on the TIL360 Multi-Digit displays. The increased spacing between the DIS279 elements and the integrated magnifying lens improved the readability of the 0.1/2.54 mm characters significantly compared to the TI-2500 Version 2. The DIS134B was soon replaced with the DIS134C with 9 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
0.200/5.1 mm Character Spacing
Integrated Clear Plastic Lens

Family Members and Applications

Type Products Digits Comments
DIS134B TI-2550 (Italy)  

 

Genealogy

Type Products Relationship Comments
DIS288 SR-50  Relative  Uses 14*DIS279
DIS115E SR-11 Version 1  Relative  Uses 12*DIS279
DIS134C TI-2500 Version 3, TI-2550 Version 1  Successor  Uses 9*DISXXX

 

Technical Specifications

Item Min Typ Max Unit Comments
Display
Width
  2.50
63.5
  inch
mm
  
Display
Height
  1.02
26.0
  inch
mm
  
Display
Depth
  0.26
6.6
  inch
mm
 Including Printed Circuit Board,
 without Pins
PCB
Thickness
  0.03
0.8
  inch
mm
  
Lens
Width
  2.10
53.3
  inch
mm
  
Lens
Height
  0.38
9.7
  inch
mm
  
Lens
Depth
  0.23
5.8
  inch
mm
 
Character
Height
  0.100
2.54
  inch
mm
 
Character
Width
  0.070
1.78
  inch
mm
 w/o Decimal Point
Character
Slant Angle
  10   degrees   
Character
Spacing
  0.200
5.08
  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 DIS134B uses a 2.50" / 63.5 mm by 1.02 / 26.0 mm rectangular printed circuit board (PCB) with 19 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 Segments
2 C Digit 9 (Minus Sign)
3 A F Segments
4 C Digit 8 (MSD)
5 A E Segments
6 C Digit 7
7   n.c.
8 C Digit 6
9 A Decimal Points
10 C Digit 5
11 A D Segments
12 C Digit 4
13   n.c.
14 C Digit 3
15 A A Segments
16 C Digit 2
17 A C Segments
18 C Digit 1 (LSD)
19 A B 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 1-9 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.