Description
The LED1642GW is a monolithic, low voltage, low current power 16-bit shift register designed for LED panel displays. The LED1642GW guarantees 20 V output driving capability allowing the user to connect several LEDs in series. In the output stage, sixteen regulated current sources provide from 3 mA to 40 mA constant current to drive the LEDs. The current is programmed through an external resistor and can be adjusted by a 7-bit current gain register in two subranges. The brightness can be adjusted separately for each channel through 12/16-bit grayscale control.
Programmable turn-on and turn-off time (four different values available) improves the low noise generation performance of the system.

FEATUREs
• 16 constant current output channels
• Output current: from 3 mA to 40 mA
• Current programmable through external
   resistor
• 7-bit global current gain adjustment in two
   ranges
• 12/16-bit PWM grayscale brightness control
• Programmable output turn-on/off time
• Error detection mode (both open and shortedLED)
• Programmable shorted-LED detection
   thresholds
• Auto power saving/auto-wakeup
• Selectable SDO synchronization on the CLK
   falling edge
• Gradual output delay (selectable)
• Supply voltage: 3 V to 5.5 V
• Thermal shutdown and overtemperature alert
• 30 MHz 4-wires interface
• 20 V current generator rated voltage

APPLICATIONs
• Full color/monochrome large displays
• LED signage