A68064 Datasheet -

Below is a simple Arduino sketch demonstrating how to control 8 outputs using three digital pins, as implied by the datasheet’s serial interface:

// A68064 Driver Example
int dataPin = 2;
int clockPin = 3;
int strobePin = 4;
int enablePin = 5;
void setup() 
pinMode(dataPin, OUTPUT);
pinMode(clockPin, OUTPUT);
pinMode(strobePin, OUTPUT);
pinMode(enablePin, OUTPUT);
digitalWrite(enablePin, LOW); // Enable outputs
digitalWrite(strobePin, LOW);

void writeA68064(byte data) 
// Shift out 8 bits, MSB first (output 1 = MSB)
for (int i = 7; i >= 0; i--) 
digitalWrite(dataPin, (data >> i) & 1);
digitalWrite(clockPin, HIGH);
delayMicroseconds(1);
digitalWrite(clockPin, LOW);
// Latch the data
digitalWrite(strobePin, HIGH);
delayMicroseconds(1);
digitalWrite(strobePin, LOW);
 a68064 datasheet
void loop() 
writeA68064(0b10101010); // Alternate outputs ON
delay(1000);
writeA68064(0b01010101); // Alternate outputs OFF
delay(1000);

A frequently overlooked section of the a68064 datasheet is thermal design. The device dissipates power primarily through output transistor saturation: Below is a simple Arduino sketch demonstrating how

PD = ∑ (VCE(sat) × IOUT(n)) + (VDD × IDD)

For example, with 8 outputs at 250 mA each and VCE(sat) = 0.9V: PD = 8 × (0.9 × 0.25) + (5 × 0.01) ≈ 1.8 W

In a DIP package with θJA = 65°C/W, the junction temperature rise is 117°C above ambient—exceeding the limit. Thus, you must: void writeA68064(byte data) // Shift out 8 bits,

Ignoring maximum ratings can lead to immediate component failure. Here are the critical values:

Design Tip: Always derate output current when multiple channels are active. At 85°C ambient, reduce total power by 50%.