Overview
The SC28L91A1B,551 is a single-channel Universal Asynchronous Receiver/Transmitter (UART) integrated circuit from NXP USA Inc., part of the IMPACT family of Serial Communications Controllers. This device operates at both 3.3 V and 5.0 V supply voltages, making it versatile for various applications. It features enhanced capabilities such as 16-character receiver and transmitter FIFOs, a watchdog timer for the receiver, and extended baud rate support. The SC28L91A1B,551 is designed to minimize receiver overrun and transmitter underrun, and it includes flow control via RTS/CTS signaling and a versatile I/O structure.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage | 3.3 V or 5.0 V | V |
| Operating Temperature Range | -40°C to +85°C | °C |
| Storage Temperature Range | -65 to +150 | °C |
| FIFO Size | 8 or 16 bytes | bytes |
| Data Transfer Rate | Up to 1 Mbit/s | Mbit/s |
| Package Types | 44-pin PLCC, 44-pin PQFP | |
| Package Power Dissipation (PLCC44) | 2.4 W | W |
| Package Power Dissipation (PQFP44) | 1.78 W | W |
Key Features
- Full-duplex independent asynchronous receiver/transmitter with 16-character FIFOs for both receiver and transmitter.
- Versatile interrupt system with single interrupt output and up to six separate interrupt outputs that may be wire ORed.
- Watchdog timer for the receiver and start-end break interrupt/status with mid-character break detect.
- On-chip crystal oscillator and power-down mode for energy efficiency.
- Flow control capability via RTS/CTS signaling to prevent receiver buffer overflow.
- Multi-function 8-bit output port with individual bit set/reset capability and programmable status/interrupt signals.
- Automatic wake-up mode for multi-drop applications.
Applications
The SC28L91A1B,551 is suitable for a variety of serial communication applications, including clustered terminal systems, multi-drop networks, and other systems requiring reliable and efficient asynchronous data transfer. Its features make it particularly useful in environments where data integrity and minimal interrupt overhead are crucial.
Q & A
- What are the operating supply voltages for the SC28L91A1B,551?
The SC28L91A1B,551 operates at both 3.3 V and 5.0 V supply voltages.
- What is the maximum data transfer rate of the SC28L91A1B,551?
The maximum data transfer rate is up to 1 Mbit/s.
- What types of packages are available for the SC28L91A1B,551?
The device is available in 44-pin PLCC and 44-pin PQFP packages.
- Does the SC28L91A1B,551 have flow control capabilities?
Yes, it includes flow control via RTS/CTS signaling to prevent receiver buffer overflow.
- What is the purpose of the watchdog timer in the SC28L91A1B,551?
The watchdog timer is used to monitor the receiver and prevent data loss due to receiver inactivity.
- Can the SC28L91A1B,551 be used in multi-drop applications?
Yes, it supports automatic wake-up mode for multi-drop applications.
- What is the storage temperature range for the SC28L91A1B,551?
The storage temperature range is -65°C to +150°C.
- Does the SC28L91A1B,551 have a power-down mode?
Yes, it includes a power-down mode for energy efficiency.
- How many interrupt outputs can be configured on the SC28L91A1B,551?
Up to six separate interrupt outputs can be configured.
- What is the purpose of the multi-function 8-bit output port?
The multi-function 8-bit output port can be programmed to provide status/interrupt signals and other general-purpose functions.
