Key facts
- Brand
- EXAR
- Model
- ST554D
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-06-01
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EXAR ST16C554/554D/68C554 Datasheet
The ST16C554 series is a universal asynchronous receiver‑transmitter (UART) offering a dual‑footprint interface and enhanced functionality. It provides 16‑byte transmit and receive FIFOs, up to 1.5 Mbps data rates, independent transmit/receive control, a software‑selectable baud‑rate generator, four selectable FIFO interrupt trigger levels, and a standard modem interface. The devices are offered in 64‑pin TQFP and 68‑pin PLCC packages, with the 68‑pin version supporting both 16‑mode (Intel) and 68‑mode (Motorola) bus interfaces.
The datasheet includes detailed pin descriptions, block diagrams for both 16‑mode and 68‑mode operation, ordering information with temperature ranges, mechanical dimensions for the PLCC carrier, and legal notices. Compatibility with industry‑standard UARTs such as ST16C454, ST68C454, ST68C554 and TL16C554 is also listed.
EXAR ST554D specifications
| Maximum data rate | 1.5 Mbps |
|---|---|
| Transmit FIFO size | 16 bytes |
| Receive FIFO size | 16 bytes with error flags |
| Operating temperature (ST16C554DCJ68) | -0 °C to +70 °C |
| Operating temperature (ST16C554DIN68) | 40 °C to +85 °C |
| Baud‑rate generator | Software selectable |
| Interrupt trigger levels | Four selectable receive FIFO levels |
| Modem interface | Standard modem interface |
| Compatibility | ST16C454, ST68C454, ST68C554, TL16C554 |
All EXAR ST554D documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the maximum data rate of the ST16C554/554D/68C554 UART?
The device supports up to 1.5 Mbps transmit and receive operation.
How large are the transmit and receive FIFOs?
Both transmit and receive FIFOs are 16 bytes deep, with error flags on the receive side.
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