NE587 Philipss, NE587 Datasheet
NE587
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NE587 Summary of contents
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... LED decoder/driver DESCRIPTION The NE587 is a latch/decoder/driver for 7-segment common anode LED displays. The NE587 has a programmable current output up to 50mA which is essentially independent of output voltage, power supply voltage, and temperature. The data (BCD) inputs and LE (latch enable) input are low-loading so that they are compatible with any data bus system ...
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... BLOCK DIAGRAM V (18) CC RBI ( ( (8) P GND (9) August 31, 1994 .. BCD TO DATA 7-SEGMENT LATCHES DECODER BANDGAP SEGMENT REFERENCE CURRENT DRIVER .. POWER GND (10) 531 Product specification NE587 BI/RBO (4) a (15) b (14) c (13) d (12) (11) e (17 (16) ...
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... OFF I Supply current CCO I Supply current CCI NOTES: NE587 Programming: The NE587 output current can be programmed, provided a program resistor, R voltage at I (Pin 8) is constant ( 1.3V). Thus, a current through R P current range. August 31, 1994 =5V =1k ( 1%), unless otherwise specified. CC ...
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... RP, connected between RP (Pin 8) and GND (Pin 9). The voltage at RP (Pin 8) is constant ( 1.3V). A partial schematic the voltage reference used in the NE587 is shown in Figure 1. Output current to program current ratio the 15mA 50mA range ...
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... D – É É É É É É É OUTPUT Figure 4. Setup and Hold Times 534 Product specification NE587 and many cases SEG t W É É É É É É É É É É É É ...
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... Product specification NE587 Normalized Output Current vs Temperature V = 5.0V CC 110.0 105.0 NE587 OUT P (%) 100.0 95.0 90 TEMP ( C) Output Current vs Program Resistor 50 5. OUT 40 ( 30.0 I OUT (mA) 20.0 10.0 0.0 0 2.0 4.0 6.0 8 NE587 RBO should be 0.01 F ceramic. CC ...
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... S I SEG The duty cycle for this system depends upon V characteristics of the display driver. With V = 4.9V peak 2.0V F The duty cycle is approximately 60%. 536 Product specification NE587 are two different supplies, the V supply may be S supply is totally unnecessary, and and the output S F ...
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... Figure 6. 4-Digit Display with Brightness Control and Leading-Edge Ripple Blanking ADDRESS DECODE Figure 7. Interfacing 8-Digit LED Display with P Bus August 31, 1994 NE587 NE587 BRIGHTNESS CONTROL DATA BUS ADDRESS BUS NE591 .01 F NE587 R P 537 Product specification NE587 NE587 ...
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... Philips Semiconductors Linear Products LED decoder/driver V S DIGIT 1 DIGIT 2 DIGIT 3 DIGIT 4 Figure 8. Interfacing 4-Digit Multiplexed LED Display August 31, 1994 NE587 538 Product specification NE587 V CC ...