XR32220 Datasheet, PDF (1/13 Pages) Exar Corporation – 2-Driver/2-Receiver Intelligent RS-232 Transceiver

XR32220
2-Driver/2-Receiver Intelligent RS-232 Transceiver
with 1.65V-5.5V Interface
General Description
The XR32220 product is a 2 driver/ 2 receiver RS-232 transceiver
featuring a variable low voltage logic interface, down to 1.65V.
This product is intended for portable or hand-held applications
such as notebook and palmtop computers. The XR32220EBER
device feature slew-rate limited outputs for reduced crosstalk and
EMI. The XR32220EUER device is optimized for high speed with
data rates up to 1Mbps, easily meeting the demands of high
speed RS-232 applications.
The XR32220 uses an internal high-efficiency charge-pump
power supply that requires only four 0.1μF capacitors in 3.3V
operation. This charge pump combined with Exar's driver archi-
tecture allow the XR32220 to deliver compliant RS-232 perfor-
mance from a single power supply ranging from +3.0V to +5.5V.
The AUTO ON-LINE® feature allows the device to automatically
"wake-up" during a shutdown state when an RS-232 cable is con-
nected and a connected peripheral is turned on. Otherwise, the
device automatically shuts itself down drawing less than 1μA.
FEATURES
• Meets true EIA/TIA-232-F Standards from a
+3.0V to 5.5V power supply
• Interoperable with EIA/TIA-232 and adheres to
EIA/TIA-562 down to a +2.7V power source
•1.65V to 5.5V Logic Interface V_L pin
• AUTO ON-LINE circuitry automatically wakes up
from a 1A shutdown
• Regulated Charge Pump yields stable RS-232
Outputs regardless of V_CC variations
• Enhanced ESD Specifications
• ±15kV Human Body Model
• ±15kV IEC61000-4-2 Air Discharge
• ±8kV IEC61000-4-2 Contact Discharge
• 250Kbps min transmission rate (speed grade B)
• 1000Kbps min transmission (speed grade U)
• -40°C to 85°C ambient operating temperature
• Lead-free (RoHS 6) package
APPLICATIONS
• Industrial and Single Board Computers
• Industrial and Process Control Equipment
• Point-Of-Sales Equipment
• Building Security and Automation
Typical Application and Package Pinout
VL
VCC
0.1F
18
VL
19
VCC
0.1F
0.1F
0.1F
21
C1+
16
C1-
22
C2+
23
C2-
Charge
Pump
V+ 20
V- 24
0.1F
0.1F
Ordering Information – page 13
NC 1
24
23
22
21
20
19
18 VL
TTL/CMOS
Inputs
To -P Supervisor
Circuit
10
T1IN
9
T2IN
VCC
14 Shutdown
15 OnLine
13 Status
Auto On-line /
Control
T1OUT 5
T2OUT 6
RS-232
Outputs
NC 2
R1IN 3
R2IN 4
T1OUT 5
XR32220
24 pin QFN
(4x4mm)
17 GND
16 C1-
15 Online
14 Shutdown
TTL/CMOS
Outputs
12 R1OUT
11 R2OUT
GND
17
R1IN 3
5K
R2IN 4
5K
RS-232
Inputs
T2OUT 6
13 Status
7
8
9
10
11
12
© 2014 Exar Corporation
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exar.comXR32220
Rev 1A