MOTOROLA SEMICONDUCTOR TECHNICAL DATA MC14489B M u Iti-Character lED Display/lamp Driver CMOS p SVFFiX PLASTICOIP CASE73 The MC144898 is a flexible light-emitting-diode driver which directly in- terfaces to individual lamps, 7-segment displays, or various combinations of both. LEOs wired with common cathodes are driven in a multiplexed-by-5 PW SUFF,~ fashion. Communication with an MCUIMPU is established through a synchro- SOOPACKAGE nous serial port. The MC 144898 features data retention plus decode and scan CASE 7510 circuitry, thus relieving processor overhead. A single, current-setting resistor is the only ancillary component required. ORDERING INFQRMATJON A single device can drive anyone of the following: a 5-digit display plus MC14489BP PlaSticDtP decimals, a 4-112-digit display plus decimals and sign, or 25 lamps. A special MC14489BDW SOOP~gec technique allows driving 5 112 digits see Figure 16. A configuration register allows the drive capability to be partitioned off to suit many additional applica- tions. The on-chip decoder outputs 7-segment-format numerals O to 9, hexa- decimal characters A to F, plus 151etters and symbols. The MC144898 is compatible with the Motorola SPI and National MI- CRO-WIRETM serial data ports. The chip s patented 8itGrabberTM registers augment the serial interface by allowing random access without steering or address bits. A 24-bit transfer updates the display register. Changing the con- figuration register requires an 8-bit transferOperating Voltage Range of Drive Circuitry: 4.5 to 5.5 V .Operating Junction Temperature Range: -40 to 130C .Current Sources Controlled by Single Resistor Provide Anode Drive .Low-Resistance FET Switches Provide Direct Common Cathode Interface .Low-Power Mode (Extinguishes the LEDs) and Brightness Controlled via Serial Port .Special Circuitry Minimizes EMI when Display is Driven and Eliminates EMI in Low-Power Mode .Power-On Reset (POR) Blanks the Display on Power-Up, Independent of Supply Ramp Up Time .May Be Used with Double-Heterojunction LEDs for Optimum Efficiency .Chip Complexity: 4300 Elements (FETs, Resistors, Capacitors, etc.) BitGrabber is a trademark of Motorola Inc. MICROWIRE is a trademark of National Semiconductor Corp. REVO November 2000BLOCK DIAGRAM 12 DATA IN D 241/2STAGE 18 11 DATA OUT CLOCK SHIFT REGISTER C 10 4 4 4 4 4 4 ENABLE PIN 3 = V DD BitGrabber PIN 14 = V SS DISPLAY REGISTER BitGrabber 24 BITS CONFIGURATION REGISTER 4 4 4 4 4 4 8 BITS NIBBLE MUX AND 5 OSCILLATOR AND DECODER ROM POR CONTROL LOGIC 7 a TO g h DIM/BRIGHT 5 BLANK ANODE DRIVERS 8 Rx BANK SWITCHES (FETs) (CURRENT SOURCES) 7 6 5 42 1 20 19 9 13 15 16 17 ab c d e f g h BANK 1 BANK 2 BANK 3 BANK 4 BANK 5 MAXIMUM RATINGS* (Voltages Referenced to V ) SS This device contains protection circuitry to Symbol Parameter Value Unit guard against damage due to high static volt- V DC Supply Voltage 0.5 to + 6.0 V ages or electric fields. However, precautions DD must be taken to avoid applications of any volt- V DC Input Voltage 0.5 to V + 0.5 V in DD age higher than maximum rated voltages to this V DC Output Voltage 0.5 to V + 0.5 V highimpedance circuit. For proper operation, out DD V and V should be constrained to the range in out I DC Input Current per Pin 15 mA in V (V or V ) V . SS in out DD (Includes Pin 8) Unused inputs must always be tied to an ap- propriate logic voltage level (e.g., either V or I DC Output Current mA SS out V ). Unused outputs must be left open. Pins 1, 2, 4 7, 19, 20 Sourcing 40 DD Sinking 10 Pins 9, 13, 15, 16, 17 Sinking 320 Pin 18 15 I , I DC Supply Current, V and V Pins 350 mA DD SS DD SS T Chip Junction Temperature 40 to + 130 C J R Device Thermal Resistance, C/W JA JunctiontoAmbient (see Thermal Considerations section) Plastic DIP 90 SOG Package 100 T Storage Temperature 65 to + 150 C stg T Lead Temperature, 1 mm from Case for 260 C L 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. MC14489B MOTOROLA 2