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File name CA3161.pdf

CA3161 August 1997 BCD to Seven Segment Decoder/Driver Description The CA3161E is a monolithic integrated circuit that performs the BCD to seven segment decoding function and features constant current segment drivers. When used with the CA3162E A/D Converter the CA3161E provides a complete digital readout system with a minimum number of external parts. Features · TTL Compatible Input Logic Levels · 25mA (Typ) Constant Current Segment Outputs · Eliminates Need for Output Current Limiting Resistors · Pin Compatible with Other Industry Standard Decoders · Low Standby Power Dissipation . . . . . . . . 18mW (Typ) Ordering Information PART NUMBER CA3161E TEMP. RANGE (oC) 0 to 70 PACKAGE 16 Ld PDIP PKG. NO. E16.3 Pinout CA3161 (PDIP) TOP VIEW Functional Block Diagram BCD INPUTS 23 22 21 20 6 2 1 7 INPUT BUFFERS BCD TO 7 SEGMENT DECODER 13 12 CONSTANT CURRENT SEGMENT DRIVERS 11 10 9 15 BCD INPUTS 21 22 NC NC 1 2 3 4 5 6 7 8 16 V + SEGMENT DRIVER OUTPUTS 15 f 14 g 13 a 12 b 11 c 10 d 9 e BIAS CIRCUITRY 14 a b c d e f g BCD INPUTS NC 23 20 GND 8 GND 16 V+ SEGMENT a-g a f g e d SEGMENT DRIVER SEGMENT IDENTIFICATION b c CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. http://www.intersil.com or 407-727-9207 | Copyright © Intersil Corporation 1999 File Number 1079.3 9-5 SEGMENT DRIVER OUTPUTS CA3161 Absolute Maximum Ratings DC VSUPPLY (Between Terminals 1 and 10) . . . . . . . . . . . . . . +7.0V Input Voltage (Terminals 1, 2, 6, 7). . . . . . . . . . . . . . . . . . . . . . +5.5V Output Voltage Output "Off". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +7V Output "On" (Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +10V Thermal Information Thermal Resistance (Typical, Note 2) JA (oC/W) PDIP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . 150oC Maximum Storage Temperature Range . . . . . . . . . .-65oC to 150oC Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . . 300oC Operating Conditions Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . .0oC to 75C CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. NOTES: 1. This is the maximum output voltage for any single output. The output voltage must be consistent with the maximum dissipation and derating curve for worst case conditions. Example: All segments "ON", 100% duty cycle. 2. JA is measured with the component mounted on an evaluation PC board in free air. Electrical Specifications PARAMETER VSUPPLY Operating Range, V + TA = 25oC TEST CONDITIONS MIN 4.5 18 2 2V 0V tPHL tPLH -30 -40 TYP 5 3.5 25 2.6 1.4 MAX 5.5 8 32