Product Summary

The W742S81A50F is a high-performance 4-bit microcontroller (μC) that provides an LCD driver. The W742S81A50F contains a 4-bit ALU, two 8-bit timers, two dividers (for two oscillators) in dual-clock operation, a 40 × 4 LCD driver, six 4-bit I/O ports (including 1 output port for LED driving), and one channel DTMF generator. There are also five interrupt sources and 16-levels subroutine nesting for interrupt applications. The W742S81A50F operates on very low current and has two power reduction modes, that is the dual-clock slow operation and STOP mode, which help to minimize power dissipation.

Parametrics

W742S81A50F absolute maximum ratings: (1)Supply Voltage to Ground Potential: -0.3 to +7.0 V; (2)Applied Input/Output Voltage: -0.3 to +7.0 V; (3)Power Dissipation: 120 mW; (4)Ambient Operating Temperature: 0 to +70 °C; (5)Storage Temperature: -55 to +150 °C.

Features

W742S81A50F features: (1)Synchronous operation; (2)High-speed access time: 4.5/5/6 nS (max.); (3)Single +3.3V power supply; (4)Individual byte write capability; (5)3.3V LVTTL compatible I/O; (6)Clock-controlled and registered input; (7)Asynchronous output enable; (8)Pipelined data output capability; (9)Supports snooze mode (low-power state); (10)Internal burst counter supports Intel burst (Interleaved)mode & linear burst mode; (11)Support 2T/1T mode; (12)Packaged in 128-pin QFP and TQFP.

Diagrams

W742S81A50F pin connection