XR16L784_08 Datasheet, PDF (49/51 Pages) Exar Corporation – HIGH PERFORMANCE 2.97V TO 5.5V QUAD UART

REV. 1.2.3
REVISION HISTORY
XR16L784
HIGH PERFORMANCE 2.97V TO 5.5V QUAD UART
REVISION
DESCRIPTION
P1.0.0
1.0.1
Preliminary
Further clarification on A0-A7, RTS#, CTS#, DTR#, DSR# and ENIR pin description and throughout the
datasheet, change V_IH from 2.2V to 2.4V at 5V, change V_OH from 2.4V to 2.0 at 3.3V and from 4V to 2.4V at
5V, change I_CC from 10 to 5mA and its test condition to 2MHz. clock, and I_SLEEP to 0.6 and 1.5mA for 3.3V and
5V respectively. Revised the AC timing table.
1.0.2
1.1.0
Updated values of AC Electrical Characteristics (T_AS, T_AH, T_CS, T_RD, T_ADS, T_ADH, T_WDS, T_WDH). Added Exar’s
UART Technical Support E-mail address to first and last page.
(June 2003) Added Device Status to Ordering Information.
1.2.0
(June 2004) Clarified pin descriptions- changed from using logic 1 and logic 0 to HIGH (VCC) and LOW (GND)
for input and output pin descriptions. Added VOH vs. IOH and VOL vs. IOL curves (Figure 16 and
Figure 17). Clarified Transmit and Receive interrupt timing diagrams (Figure 21-Figure 24). DREV regis-
ter was updated to 0x04 for devices with top mark date code of "D2 YYWW".
1.2.1
(February 2005) Corrected Trigger Table selection and programmable trigger level selection in Table 14.
1.2.2
(October 2005) Updated the 1.4mm-thick Quad Flat Pack package description from "TQFP" to "LQFP" to be
consistent with the JEDEC and Industry norms. Clarified wake-up interrupt in Sleep Mode description.
1.2.3
(July 2008) Corrected description of Xon/Xoff/Special character interrupt.
NOTICE
EXAR Corporation reserves the right to make changes to the products contained in this publication in order to
improve design, performance or reliability. EXAR Corporation assumes no responsibility for the use of any
circuits described herein, conveys no license under any patent or other right, and makes no representation that
the circuits are free of patent infringement. Charts and schedules contained here in are only for illustration
purposes and may vary depending upon a user’s specific application. While the information in this publication
has been carefully checked; no responsibility, however, is assumed for inaccuracies.
EXAR Corporation does not recommend the use of any of its products in life support applications where the
failure or malfunction of the product can reasonably be expected to cause failure of the life support system or
to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless
EXAR Corporation receives, in writing, assurances to its satisfaction that: (a) the risk of injury or damage has
been minimized; (b) the user assumes all such risks; (c) potential liability of EXAR Corporation is adequately
protected under the circumstances.
Copyright 2008 EXAR Corporation
Datasheet July 2008.
Send your UART technical inquiry with technical details to hotline: [e-mail].
Reproduction, in part or whole, without the prior written consent of EXAR Corporation is prohibited.
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