Overview
The SC28L91A1B,557 is a Universal Asynchronous Receiver/Transmitter (UART) produced by NXP USA Inc. It is part of the IMPACT family of Serial Communications Controllers and operates at both 3.3 V and 5.0 V VCC. This single-channel UART is designed to enhance serial communication capabilities with advanced features such as 16-character receiver and transmitter FIFOs, a watchdog timer, and extended baud rate capabilities. It is compatible with software of the SC28L92 and previous UARTs offered by Philips, making it a versatile component for various serial communication applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Voltage | 3.3 V, 5.0 V | V |
| Operating Temperature Range | -40°C to +85°C | °C |
| Storage Temperature Range | -65 to +150 | °C |
| Package Type | 44-pin PLCC, 44-pin PQFP | |
| FIFO Size | 8 or 16 characters | |
| Package Power Dissipation (PLCC44) | 2.4 W | W |
| Package Power Dissipation (PQFP44) | 1.78 W | W |
| Derating Factor above 25°C (PLCC44) | 19 mW/°C | mW/°C |
| Derating Factor above 25°C (PQFP44) | 14 mW/°C | mW/°C |
Key Features
- Full-duplex independent asynchronous receiver/transmitter with 16-character receiver and transmitter FIFOs to minimize receiver overrun and transmitter underrun.
- Watchdog timer for the receiver and programmable receiver and transmitter interrupts.
- Extended baud rate capabilities and faster bus and data speeds.
- Flow control capability via RTS/CTS signaling to disable a remote transmitter when the receiver buffer is full.
- DMA interface and multipurpose I/O ports (7-bit input port and 8-bit output port) that can be used as general-purpose ports or assigned specific functions under program control.
- Compatibility with software of the SC28L92 and previous UARTs offered by Philips.
Applications
The SC28L91A1B,557 is suitable for a variety of serial communication applications, including clustered terminal systems, industrial automation, and any system requiring reliable and efficient serial data transmission. Its advanced features such as FIFOs, watchdog timer, and flow control make it particularly useful in systems where data integrity and minimal interrupt overhead are crucial.
Q & A
- What is the operating voltage range of the SC28L91A1B,557?
The SC28L91A1B,557 operates at both 3.3 V and 5.0 V VCC.
- What types of packages are available for the SC28L91A1B,557?
The component is available in 44-pin PLCC and 44-pin PQFP packages.
- What is the FIFO size of the SC28L91A1B,557?
The FIFO size is either 8 or 16 characters for both the receiver and transmitter.
- Does the SC28L91A1B,557 support flow control?
- What are the key improvements over previous UART models?
The improvements include 16-character FIFOs, a watchdog timer, extended baud rate capabilities, and faster bus and data speeds.
- Is the SC28L91A1B,557 compatible with previous UART software?
- What is the operating temperature range of the SC28L91A1B,557?
- What is the package power dissipation for the PLCC44 package?
- Can the I/O ports be used for general-purpose functions?
- What is the storage temperature range for the SC28L91A1B,557?
