This document is a data sheet for the SC28C94 quad universal asynchronous receiver/transmitter (QUART) produced by Philips Semiconductors.
The SC28C94 Quad Universal Asynchronous Receiver/Transmitter (QUART) integrates four industry‑standard UARTs with independent baud‑rate selection, FIFO buffers and an interrupt scheme that reduces host processor overhead. It operates from a single +5 V supply and is implemented in a high‑speed CMOS process for low power consumption.
The data sheet provides a complete description of the device, including pin configurations, absolute maximum ratings, functional block diagrams, register definitions and timing information for the built‑in baud‑rate generator and counter/timers.
| Package | 52‑Pin PLCC |
|---|---|
| Operating Temperature Range | -40 °C to +85 °C |
| Supply Voltage | Single +5 V |
| FIFO Size per UART | 8‑byte receive FIFO, 8‑byte transmit FIFO |
| Data Bus Release Time | 10 ns |
| Power Dissipation (PLCC‑52) | 28 mW |
The SC28C94 operates from a single +5 V power supply.
The device contains four independent UART channels.
It is supplied in a 52‑pin PLCC package.
The device operates from –40 °C to +85 °C.