XR16L784 Exar Corporation, XR16L784 Datasheet - Page 5

• Manufacturer Part Number: XR16L784
• Description: High Performance 5V And 3.3V Quad Uart
• Manufacturer: Exar Corporation

Pin Description
N
OD=Output Open Drain.
ANCILLARY SIGNALS
OTE
TMRCK
DSR3#
DTR3#
16/68#
XTAL1
XTAL2
: Pin type: I=Input, O=Output, IO= Input/output,
CD3#
RST#
N
ENIR
GND
RI3#
VCC
AME
10,29,51
9,30,52
P
27
23
24
25
50
49
31
32
20
19
IN
#
T
YPE
O
O
I
I
I
I
I
I
I
I
UART channel 3 Data Terminal Ready or general purpose output (active low).
See description of DTS0# pin.
UART channel 3 Data Set Ready or general purpose input (active low). See
description of DSR0# pin.
UART channel 3
UART channel 3 Ring Indicator or general purpose input (active low).
Crystal or external clock input.
Crystal or buffered clock output.
16-bit timer/counter external clock input.
Infrared mode enable (active high). This pin is sampled during power up, fol-
lowing a hardware reset (RST#) or soft-reset (register RESET). It can be
used to start up all 8 UARTs in the infrared mode. The sampled logic state is
transferred to MCR bit-6 in the UART.
Reset (active low). The configuration and UART registers are reset to default
values, see Table-15.
Intel or Motorola data bus interface select. Logic one selects Intel bus inter-
face and logic zero selects Motorola interface. This input affects the function-
ality of IOR#, IOW# and CS# pins.
+5V or +3.3V supply, all inputs are 5V tolerant.
Power supply common, ground.
5
Carrier Detect or general purpose input (active low).
HIGH PERFORMANCE 5V AND 3.3V QUAD UART
D
ESCRIPTION
XR16L784
REV. 1.0.1