AY0438T-I/L

Overview

The AY0438T-I/L is a 32-segment CMOS LCD driver manufactured by Microchip Technology. It drives up to 32 LCD segments in arbitrary configurations using a CMOS process that ensures wide supply voltage range, low-power operation, high-noise immunity, and wide temperature range capabilities. The device features CMOS and TTL-compatible inputs, electrostatic discharge protection on all pins, and an on-chip oscillator. It requires only three control lines for operation and supports cascading for expanded segment driving needs.

Feature Summary

• Drives up to 32 LCD segments of arbitrary configuration
• CMOS process for wide supply voltage range, low-power operation, high-noise immunity, and wide temperature range
• CMOS and TTL-compatible inputs with electrostatic discharge protection on all pins
• Cascadable design with on-chip oscillator requiring only three control lines

Applications

• Driving LCD segments in embedded systems
• Low-power display interfaces
• High-noise immunity applications
• Wide temperature range environments

Procurement Notes

Verify the exact suffix 'T-I/L' against official Microchip documentation to confirm tape-and-reel packaging and industrial temperature grade specifications. Ensure compatibility with system voltage levels and control line requirements before procurement. Cross-reference datasheet revision history for any pinout or functional updates.

Selection Notes

Select this component when a dedicated LCD driver is needed for up to 32 segments without external multiplexing complexity. Consider its CMOS compatibility and low-power characteristics for battery-operated devices. Verify that the on-chip oscillator meets timing requirements or if an external clock is preferred. Check cascading capabilities if more than 32 segments are required.

Part Context

The AY0438 series belongs to Microchip's family of CMOS LCD drivers designed for simple, cost-effective segment-based displays. These drivers integrate necessary logic and oscillators to reduce external component count. The T-I/L variant specifically denotes industrial temperature range and tape-and-reel packaging for automated assembly.

Replacement Considerations

Check Microchip's official substitution guide for direct replacements like AY0438L. Verify pin compatibility and electrical characteristics before substituting with other 32-segment LCD drivers from different manufacturers.