mc14489 Freescale Semiconductor, Inc, mc14489 Datasheet
mc14489
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mc14489 Summary of contents
Page 1
... LEDs wired with common cathodes are driven in a multiplexed–by–5 fashion. Communication with an MCU/MPU is established through a synchro- nous serial port. The MC14489 features data retention plus decode and scan circuitry, thus relieving processor overhead. A single, current–setting resistor is the only ancillary component required. ...
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... T L Lead Temperature from Case for 10 Seconds * Maximum Ratings are those values beyond which damage to the device may occur. Functional operation should be restricted to the limits in the Electrical Characteristics tables or Pin Descriptions section. MC14489 2 BLOCK DIAGRAM D 24–1/2–STAGE SHIFT REGISTER ...
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... Leakage) I out = 0 to 200 mA 5.0 Device in Low–Power Mode, 6.0 100 Place, Outputs Open Same as Above 6.0 Device NOT in Low–Power 6.0 Mode Outputs Open Unit V 3.0 V 0.9 V 1.8 2.1 V 4.2 0.2 V 0.4 0.1 V 0.1 0.4 V 2.9 5.9 4.1 A 2.0 0.1 0 1.5 mA MC14489 3 ...
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... This restriction does NOT apply for f clk rates less than those listed above. For “slow” f clk rates, use the t h limits in the above table. 2. This restriction does NOT apply for an access involving more than 8 Clocks. For > 8 Clocks, use the t h limits in the above table. MC14489 – ...
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... V SS BANK 50% OUTPUT ENABLE 50 CLOCK 50% FIRST V SS CLOCK * * Includes all probe and fixture capacitance. 1/f R Figure ( ( rec V DD LAST V SS CLOCK Figure TEST POINT 56 DEVICE * UNDER C L TEST Figure 6. MC14489 5 ...
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... Eight clock cycles are required to access the configuration register, while 24 are needed for the display register when the MC14489 is not cascaded. See Figures 7 and 10. As shown in Figure 11, two devices may be cascaded. In this case, 32 clock cycles access the configuration register and 48 access the display register, as depicted in Figure 8 ...
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... To adequately drive the LEDs, this voltage must be 4 volts with respect The V DD pin contains the Rx current component plus the chip’s current drain. In the low–power mode, the current mir- ror and clock oscillator are turned off, thus significantly re- ducing the V DD current MC14489 7 ...
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... Figure 7. Timing Diagrams for Non–Cascaded Devices MC14489 8 Ç Ç Ç Ç Ç Ç Ç Ç Ç Ç Ç Ç Ç Ç Ç ...
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... LSB Bits C1 to C5) Bits Lamp Conditions No Decode (Invoked via Bits MC14489 9 ...
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... Figure 8. Bit Stream Formats for Two Devices Cascaded 400 NOTE: Drive current tolerance is approximately 15%. Figure 9. a through h Nominal Current per Output versus Rx MC14489 2ND BYTE 3RD BYTE DON’T CARE DON’T CARE (a) Configuration Registers ...
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... BANK 5 BANK 4 BANK 3 BANK 2 BANK 1 BANK 1 TO BANK 5 MC14489 #1 DATA DATA OUT IN CLOCK ENABLE OPTIONAL Figure 11. Cascading Two Devices BANK BANK 5 MC14489 #2 DATA OUT CLOCK ENABLE MC14489 11 ...
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... Figure 12. Bit Stream Formats for Three Devices Cascaded MC14489 12 MOTOROLA ...
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... Figure 13. Bit Stream Formats for Four Devices Cascaded MOTOROLA MC14489 13 ...
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... Figure 14. Bit Stream Formats for Five Devices Cascaded MC14489 14 MOTOROLA ...
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... V CMOS MCU/MPU NOTE: R1 limits the maximum current to avoid damaging the display and/or the MC14489 due to overheating. See the Thermal Considerations section. An 1/8 watt resistor may be used for R1 potentiometer ( 1/8 watt). R2 may be a light–sensitive resistor. Figure 15. Common–Cathode LED Display with Dial–Adjusted Brightness ...
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... CMOS MCU/MPU * If required, this group of lamps can be independently controlled. To accomplish independent control, only connect lamps to BANK 1 and BANK 2 for output h (two lamps). Then, use bits D20, D21, and D22 for control of these two lamps. MC14489 16 Figure 17. 25–Lamp Application THESE LAMPS ...
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... MOTOROLA BANK 1 BANK 5 TO BANK 4 MC14489 3 CMOS MCU/MPU or 4–1/2–Digit Display Plus Sign MUXED 5–DIGIT MONOLITHIC DISPLAY (CLUSTER) HEWLETT–PACKARD 5082–7415 OR EQUIVALENT MC14489 3 INPUT LINES MC14489 17 ...
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... which extends chip life, a heat sink such as shown in Figure 20 can be used in high–current applications. Alternatively, heat–spreader techniques can be used on the PC board, such as running a wide trace under the MC14489 and using thermal paste. Wide, radial traces from the MC14489 leads also act as heat spreaders. ...
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... DIMENSION B DOES NOT INCLUDE MOLD FLASH. INCHES MILLIMETERS DIM MIN MAX MIN MAX A 1.010 1.070 25.66 27.17 B 0.240 0.260 6.10 6.60 C 0.150 0.180 3.81 4.57 D 0.015 0.022 0.39 0.55 E 0.050 BSC 1.27 BSC F 0.050 0.070 1.27 1.77 G 0.100 BSC 2.54 BSC 0.008 0.015 0.21 0.38 J 0.110 0.140 2.80 3.55 K 0.300 BSC 7.62 BSC 0.020 0.040 0.51 1.01 N MC14489 19 ...
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... TOTAL IN EXCESS OF D DIMENSION AT MAXIMUM MATERIAL CONDITION. MILLIMETERS INCHES DIM MIN MAX MIN MAX A 12.65 12.95 0.499 0.510 B 7.40 7.60 0.292 0.299 C 2.35 2.65 0.093 0.104 D 0.35 0.49 0.014 0.019 F 0.50 0.90 0.020 0.035 G 1.27 BSC 0.050 BSC J 0.25 0.32 0.010 0.012 K 0.10 0.25 0.004 0.009 10.05 10.55 0.395 0.415 R 0.25 0.75 0.010 0.029 *MC14489/D* MC14489/D MOTOROLA ...