TOIM4232 is a product of Vishay Semiconductors. It is an integrated interface circuit for SIR IrDA® applications that can perform pulse shortening and stretching.
The TOIM4232 is an integrated interface circuit that shapes pulses for SIR IrDA front‑end transceivers. It shortens RS‑232 signals for transmission and stretches received infrared pulses to the proper bit width. The device operates from 2.7 V to 3.6 V and can be programmed for baud rates from 1200 bit/s to 115.2 kbit/s.
The document provides a block diagram, pin assignment, recommended application circuits, electrical characteristics, and programming instructions. It also lists the default settings, such as a 9600 bit/s default baud rate and 1.627 µs pulse width, and describes how to use an external 3.6864 MHz crystal clock.
| Operating voltage | 2.7 V to 3.6 V |
|---|---|
| Power consumption (active) | ≈10 mW |
| Power consumption (standby) | a few µW |
| Crystal clock frequency | 3.6864 MHz |
| Programmable baud rate range | 1200 bit/s to 115.2 kbit/s |
The default baud rate is 9600 bit/s when the RESET pin is set high.
Pulse width can be set to either 1.627 µs or 3/16 of a bit time.
Yes, an external 3.6864 MHz crystal clock can be connected to pins X1/X2.