Overview
The TL16C552AFN is an enhanced dual-channel version of the popular TL16C550B asynchronous communications element (ACE) produced by Texas Instruments. This device serves two serial input/output interfaces simultaneously in microcomputer or microprocessor-based systems. It performs serial-to-parallel conversion on data characters received from peripheral devices or modems and parallel-to-serial conversion on data characters transmitted by the CPU. The TL16C552AFN also includes a bidirectional parallel data port that fully supports the parallel Centronics-type printer interface, making it compatible with IBM PC/AT systems.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Package | PLCC (FN) | 68 pins |
| Operating Temperature Range | °C | -40 to 85 |
| Supply Voltage (VDD) | V | 4.75 to 5.25 |
| Clock Frequency | MHz | Up to 16 |
| Baud Rate | baud | Up to 1 Mbaud |
| FIFO Size | Bytes | 16 |
| Character Length | Bits | 5, 6, 7, or 8 |
| Parity Bit Generation and Detection | Even, Odd, or No Parity | |
| Stop Bit Generation | 1, 1-1/2, or 2 Stop Bits |
Key Features
- IBM PC/AT compatible
- Two TL16C550 ACEs integrated
- Enhanced bidirectional printer port supporting Centronics-type printer interface
- 16-Byte FIFOs to reduce CPU interrupts
- Up to 16-MHz clock rate for up to 1-Mbaud operation
- Transmit, receive, line status, and data set interrupts on each channel independently controlled
- Individual modem control signals for each channel
- Programmable serial interface characteristics for each channel
- 3-State outputs provide TTL drive for the data and control bus on each channel
- Hardware and software compatible with TL16C452
Applications
The TL16C552AFN is designed for use in microcomputer or microprocessor-based systems that require multiple serial and parallel communication interfaces. It is particularly suitable for IBM PC/AT-compatible computers, where it can serve as a single device to manage the three system ports (two serial ports and one parallel port). This component is ideal for applications in industrial automation, embedded systems, and any environment requiring robust and flexible communication capabilities.
Q & A
- What is the TL16C552AFN?
The TL16C552AFN is an enhanced dual-channel asynchronous communications element (ACE) produced by Texas Instruments.
- What are the key features of the TL16C552AFN?
Key features include IBM PC/AT compatibility, two integrated TL16C550 ACEs, enhanced bidirectional printer port, 16-Byte FIFOs, and programmable serial interface characteristics.
- What is the maximum baud rate supported by the TL16C552AFN?
The TL16C552AFN supports up to 1 Mbaud operation.
- What types of packages are available for the TL16C552AFN?
The TL16C552AFN is available in a 68-pin plastic-leaded chip-carrier (FN) package and an 80-pin TQFP (PN) package.
- What is the operating temperature range of the TL16C552AFN?
The operating temperature range is -40°C to 85°C.
- How does the FIFO in the TL16C552AFN reduce CPU interrupts?
The 16-Byte FIFOs reduce CPU interrupts by buffering data, allowing the CPU to handle other tasks without frequent interruptions.
- What are the programmable serial interface characteristics of the TL16C552AFN?
The device supports programmable serial interface characteristics including 5-, 6-, 7-, or 8-bit characters, even, odd, or no parity bit generation and detection, and 1-, 1-1/2-, or 2-stop bit generation.
- Is the TL16C552AFN compatible with other Texas Instruments components?
Yes, it is hardware and software compatible with the TL16C452.
- What is the purpose of the bidirectional parallel data port in the TL16C552AFN?
The bidirectional parallel data port fully supports the parallel Centronics-type printer interface, allowing it to serve as a single device for the three system ports in IBM PC/AT-compatible computers.
- How does the TL16C552AFN handle modem control signals?
The device provides individual modem control signals for each channel, including data carrier detect (DCD), data set ready (DSR), and other modem status signals.
