XR32220_17 Datasheet, PDF (2/15 Pages) Exar Corporation – 2-Driver/2-Receiver Intelligent RS-232 Transceiver with 1.65V to 5.5V Interface

XR32220
2-Driver/2-Receiver Intelligent RS-232 Transceiver
with 1.65V to 5.5V Interface
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 architecture allow
the XR32220 to deliver compliant RS-232 performance 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
connected and a connected peripheral is turned on. Otherwise,
the device automatically shuts itself down drawing less than 1μA.
Typical Application
0.1PF
VL
18
VL
VCC
19
VCC
0.1PF
0.1PF
0.1PF
21
C1+
16
C1-
22
C2+
23
C2-
Charge
Pump
V+ ²⁰
V- ²⁴
0.1PF
0.1PF
TTL/CMOS
Inputs
To P-P Supervisor
Circuit
10
T1IN
9
T2IN
VCC
14 Shutdown
15 OnLine
13 Status
Auto On-line /
Control
T1OUT 5
T2OUT 6
TTL/CMOS
Outputs
12 R1OUT
11 _R2OUT
GND
17
R1IN 3
5K:
R2IN 4
5K:
Figure 1. Typical Application
RS-232
Outputs
RS-232
Inputs
REV1B
FEATURES
Q Meets true EIA/TIA-232-F Standards from
a +3.0V to 5.5V power supply
Q Interoperable with EIA/TIA-232 and
adheres to EIA/TIA-562 down to a +2.7V
power source
Q _{1.65V to 5.5V Logic Interface VL pin}
Q AUTO ON-LINE circuitry automatically
wakes up from a 1μA shutdown
Q Regulated Charge Pump yields stable RS-
232 Outputs regardless of V_CC variations
Q Enhanced ESD Specifications
±15kV Human Body Model
±15kV IEC61000-4-2 Air Discharge
±8kV IEC61000-4-2 Contact
Discharge
Q 250Kbps min transmission rate
(speed grade B)
Q 1000Kbps min transmission
(speed grade U)
Q -40°C to 125°C ambient operating
temperature
Q _{Lead-free (RoHS 6) package}
APPLICATIONS
Q Industrial and Single Board Computers
Q Industrial and Process Control Equipment
Q _{Point-Of-Sales Equipment}
Q Building Security and Automation
24
23
22
21
20
19
NC 1
18 VL
NC 2
R1IN 3
R2IN 4
T1OUT 5
XR32220
24 pin QFN
(4x4mm)
17 GND
16 C1-
15 Online
14 Shutdown
T2OUT 6
13 Status
7
8
9
10
11
12
Figure 2. Package Pinout
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