AS1100WL-T

Overview

The AS1100WL-T is a serially interfaced LED driver designed for driving up to eight digits of seven-segment numeric displays. It integrates a BCD decoder, multiplex scan circuitry, segment drivers, and a 64-bit memory register to store display settings. The device supports a 10MHz serial interface and offers individual LED segment control with digital and analog brightness adjustment. It operates within a supply voltage range of 2.7V to 5.5V and features a low-power shutdown mode consuming 20µA while retaining data.

Feature Summary

• Integrates BCD code-B decoder and multiplex scan circuitry for direct drive capability
• Includes 64-bit memory to retain LED settings without continuous reprogramming
• Supports both digital and analog brightness control mechanisms
• Features extremely low operating current in open loop configuration

Applications

• Seven-segment numeric display systems
• Digital readout devices requiring serial interface control
• Applications necessitating low-power shutdown modes with data retention

Procurement Notes

Verify the specific suffix 'T' against the manufacturer's latest documentation to confirm tape and reel packaging specifications. Confirm RoHS compliance status and moisture sensitivity level (MSL) ratings prior to integration into surface mount assembly processes. Ensure the serial interface timing parameters align with the host controller's capabilities.

Selection Notes

Select this component when a cost-effective solution for driving multiple seven-segment displays via a serial bus is required. It serves as a fully compatible alternative to similar industry-standard drivers. Consider its low operating current and integrated memory features for designs prioritizing power efficiency and simplified firmware logic.

Part Context

This part belongs to the AS1100 series of LED drivers manufactured by ams-OSRAM USA INC. The series is characterized by its compatibility with standard serial interfaces and support for common-cathode LED displays. The device is available in 24-pin DIP and SO packages, providing flexibility for various board layout requirements.

Replacement Considerations

The datasheet explicitly states full compatibility with the MAX7219. Designers may consider the MAX7219 as a functional substitute if pin-out and electrical characteristics match the existing design constraints.