XR16C2850CM48 EXAR [Exar Corporation], XR16C2850CM48 Datasheet - Page 5

• Manufacturer Part Number: XR16C2850CM48
• Description: 3.3V AND 5V DUART WITH 128-BYTE FIFO
• Manufacturer: EXAR [Exar Corporation]

XR16C2850
REV. 2.0.0
Pin type: I=Input, O=Output, I/O= Input/output, OD=Output Open Drain.
CLKSEL
CLK8/16
RESET
N
GND
VCC
N.C.
AME
40-PDIP
P
none
35
40
20
IN
-
-
#
44-PLCC
P
none
39
44
22
IN
-
-
3.3V AND 5V DUART WITH 128-BYTE FIFO
#
48-TQFP
P
25
24
36
42
17
12
IN
#
T
Pwr
Pwr
YPE
I
I
I
5
3.3V or 5V power supply. Please note that the inputs are
Clock Pre-scaler select. Connect to VCC for divide by 1
(default) and GND for divide by 4. MCR[7] can override
the state of this pin following reset or initialization. See
Figure 6 and MCR[7].
Transmit/Receive data sampling rate. Connect to VCC for
normal 16X sampling clock (standard baud rates, default)
or GND for 8X sampling clock to double the standard
baud rates, 2X.
Reset (active high) - A longer than 40 ns logic 1 pulse on
this pin will reset the internal registers and all outputs.
The UART transmitter output will be held at logic 1, the
receiver input will be ignored and outputs are reset during
reset period (see External Reset Conditions).
not 5V tolerant when operating at 3.3V.
Power supply common, ground.
No Connection. These pins are open, but typically, should
be connected to GND for good design practice.
D
ESCRIPTION