CA3161 BCD to Seven Segment Decoder/Driver August 1997 Features Description • TTL Compatible Input Logic Levels 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. • 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 TEMP. RANGE (oC) CA3161E 0 to 70 16 Ld PDIP Functional Block Diagram BCD INPUTS CA3161 (PDIP) TOP VIEW 23 22 21 20 13 6 12 2 1 BCD TO 7 SEGMENT DECODER INPUT BUFFERS 7 CONSTANT CURRENT SEGMENT DRIVERS 11 10 9 15 21 1 16 V + 22 2 15 f NC 3 14 g NC 4 13 a NC 5 12 b 23 6 11 c 20 7 10 d GND 8 9 e SEGMENT DRIVER OUTPUTS BCD INPUTS E16.3 14 BIAS CIRCUITRY 8 GND a b c d e f g SEGMENT DRIVER OUTPUTS Pinout BCD INPUTS PKG. NO. PACKAGE 16 V+ SEGMENT a-g a f b g e c d SEGMENT DRIVER 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 9-5 SEGMENT IDENTIFICATION File Number 1079.3 CA3161 Absolute Maximum Ratings Thermal Information 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 Resistance (Typical, Note 2) θJA (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 75οC 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. θJA is measured with the component mounted on an evaluation PC board in free air. Electrical Specifications TA = 25oC PARAMETER TEST CONDITIONS MIN TYP MAX UNITS 4.5 5 5.5 V - 3.5 8 mA 18 25 32 mA Output Current High (VO = 5.5V) - - 250 µA Input Voltage High (Logic “1” Level) 2 - - V Input Voltage Low (Logic “0” Level) - - 0.8 V VSUPPLY Operating Range, V + Supply Current, l+ (All Inputs High) Output Current Low (VO = 2V) Input Current High (Logic “1”) 2V -30 - - µA Input Current Low (Logic “0”) 0V -40 - - µA tPHL - 2.6 - µs tPLH - 1.4 - µs Propagation Delay Time, 9-6 CA3161 TRUTH TABLE 22 L 21 L 20 L a b c OUTPUTS d e f g 0 23 L L L L L L L H 1 L L L H H L L H H H H 2 L L H L L L H L L H L 3 L L H H L L L L H H L 4 L H L L H L L H H L L 5 L H L H L H L L H L L 6 L H H L L H L L L L L 7 L H H H L L L H H H H 8 H L L L L L L L L L L 9 H L L H L L L L H L L 10 H L H L H H H H H H L 11 H L H H L H H L L L L 12 H H L L H L L H L L L 13 H H L H H H H L L L H 14 H H H L L L H H L L L 15 H H H H H H H H H H H BINARY STATE INPUTS DISPLAY BLANK 9-7 CA3161 All Intersil semiconductor products are manufactured, assembled and tested under ISO9000 quality systems certification. Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see web site http://www.intersil.com Sales Office Headquarters NORTH AMERICA Intersil Corporation P. O. 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