Key facts
- Brand
- EXAR
- Model
- 16-BYTE
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-05-09
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EXAR ST16C554/554D Rev. 3.31 PLCC Package QUAD UART WITH 16-BYTE FIFO S Manual
The ST16C554/554D is a universal asynchronous receiver‑transmitter (UART) that provides four independent UART channels, each with 16‑byte transmit and receive FIFOs and error‑flag support. It operates from 2.97 V to 5.5 V and supports data rates up to 1.5 Mbps (24 MHz clock). The device includes selectable Intel (16‑mode) or Motorola (68‑mode) bus interfaces and a range of interrupt and modem control signals.
The UART is offered in 68‑lead PLCC and 64‑lead LQFP packages, with operating temperature ranges of 0 °C to +70 °C (standard) or –40 °C to +85 °C for extended‑temperature versions. Detailed pin‑out tables, block diagrams for both interface modes, and ordering information are provided in the document.
EXAR 16-BYTE specifications
| Supply Voltage | 2.97 V to 5.5 V |
|---|---|
| Maximum Data Rate | 1.5 Mbps (24 MHz) |
| Transmit FIFO Size | 16 bytes |
| Receive FIFO Size | 16 bytes with error flags |
| Standard Operating Temperature | 0 °C to +70 °C |
| Extended Operating Temperature | -40 °C to +85 °C |
Source: EXAR ST16C554/554D Rev. 3.31 PLCC Package QUAD UART WITH 16-BYTE FIFO S Manual
All EXAR 16-BYTE documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What supply voltage range does the ST16C554/554D support?
It operates from 2.97 V up to 5.5 V.
From: EXAR ST16C554/554D Rev. 3.31 PLCC Package QUAD UART WITH 16-BYTE FIFO S Manual
What is the maximum data‑rate of the UART?
The device can transmit and receive up to 1.5 Mbps when driven by a 24 MHz clock.
From: EXAR ST16C554/554D Rev. 3.31 PLCC Package QUAD UART WITH 16-BYTE FIFO S Manual
What voltage range does the ST16C550 operate in?
It operates from 2.97 V up to 5.5 V.
How many bytes of FIFO are provided for transmit and receive?
The device provides a 16‑byte transmit FIFO and a 16‑byte receive FIFO.