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Texas Instruments SN75493 Segment Driver Chip aka SN27422, SN27915

Features

The SN75493 provides the same basic function as the SN75491 but with some key differences:

Operates from lower VCC voltages, as low as 3.2 V
An enable input is provided to allow display blanking


The SN75493 is preferred on designs running on 3 batteries and is typically found in early designs with additional segment drivers (TMS0120)

QUICK-LINK to Display Drivers.

Family Members and Applications

SR-10 and other early LED calculators

Technical Specifications

Item Min Typ Max Unit Comments
VCC 3.2 7.2 8.8 V  
VSS 6.5 7.2 8.8 V  
IL  -8 -13   mA VI=6.5 V, VO=2.2 V, RL =50 Ohm
IL     -0.1 mA  
VI-VD     10 V  

Technology

The SN75493 was manufactured in a 10 um metal gate Bipolar process (metal width = 0.4 mil / 10 um, metal spacing = 0.4 mil / 10 um).

The die size of the SN75493 is approximately tbd mils * tbd mils / tbd mm * tbd mm.

Packaging

The SN75493 uses a standard 0.3 wide 16-pin DIP (Dual In-line Package with a 0.1 / 2.54 mm lead pitch).

Pin Configuration

Pin IO Function Pin IO Function
1 V VSS 16 V VCC
2 I Current set 1 15 I Current set 4
3 O Segment output 1 14 O Segment output 4
4 I Segment input 1 13 I Segment input 4
5 I Segment input 2 12 I Segment input 3
6 O Segment output 2 11 O Segment output 3
7 I Current set 2 10 I Current set 3
8 V GND 9 I Enable drivers


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

Joerg Woerner, May 23, 2002. No reprints without written permission.