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Beckman / Sperry SP-353

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Features

The Beckman (Beckman acquired in 1973 Sperry Information Displays Division, Scottsdale, AZ) SP-352, SP-353 displays are raised-cathode, planar-gas-discharge displays. Units of equal character height can be stacked vertically or horizontally to make any desired message field while maintaining continuous inter-character spacing.

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Character Height: 0.55 inch (14 mm)

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Neon-Orange color

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210 fL Maximum Brightness

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130° Viewing Angle

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Viewing Distance: 40 feet (12.2 m)

These new types of displays incorporating „keep alive“ cathodes. Advantages of these devices include:

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Reduced anode voltage for a given turn-on time

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Maximum digit off time is greatly increased. More digits can be multiplexed

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Internal turn-on in systems using leading zero suppresion reduced to a few milliseconds

bulletNo interdigit blanking required

 

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Usage

Heathkit IC-2008A

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Technical Specification

Item Min Typ Max Unit Comments
Anode Supply Voltage 160 180 200 V  DC-Characteristics
Anode-to-Anode Differential Voltage              14 V  "
Anode-to Cathode Voltage Drop   135   V "
Cathode Current -  per segment 130 330 420 uA "
Cathode Current  - decimal point 65 135 190 uA "
Cathode Current – keep alive 10 50   uA "
Power Dissipation -  All segments lighted   325   mW "
Anode Voltage Swing 30  45 90 V Multiplex Characteristics
Anode On Time   80 200 uS "
Interdigit Blanking Time (*) 40 55   uS "
Refresh Periode – w/o keep alive     3 mS "
Refresh Periode – with keep alive   10   mS "
Cathode Voltage Swing 30 50 120 V "
Cathode Bias Voltage 30 50 120 V "
Operating Temperature 0   70 °C  
Storage Temperature -55   125 °C  

(*) No anode or cathode blanking is required for proper display performance. Some blanking, however, may be advantageous in eliminating time overlap of signals due to circuit characteristics.

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Housing

The SP-353 uses a special 30 pin glass-package.

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Pin Description

Pin Function Pin Function Pin Function
C1 Segment A B1 Segment A A1 Segment A
C2 Segment B B2 Segment B A2 Segment B
C3 Segment C B3 Segment C A3 Segment C
C4 Segment D B4 Segment D A4 Segment D
C5 Segment E B5 Segment E A5 Segment E
C6 Segment F B6 Segment F A6 Segment F
C7 Segment G B7 Segment G A7 Segment G
C8 Segment DP B8 Segment DP A8 Segment DP
C9 Anode B9 Anode A9 Anode
C10 keep alive B10 keep alive A10 keep alive

 

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Burroughs™, Sperry™ and Panaplex™ are trademarks of Unisys Corporation.

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

© Joerg Woerner, March 16, 2001. No reprints without written permission.