XR32430EUCRTR-F Datasheet, PDF (1/14 Pages) Exar Corporation – 3-Driver/5-Receiver Intelligent RS-232 Transceiver with 1.65V-5.5V Interface

XR32430/XR32431
3-Driver/5-Receiver Intelligent RS-232 Transceiver
with 1.65V-5.5V Interface
General Description
The XR32430 and XR32431 products are 3 driver/ 5 receiver
RS-232 transceivers. The XR32431 features a variable low volt-
age logic interface, down to 1.65V. These products are intended
for portable or hand-held applications such as notebook and
palmtop computers. The XR32430EB and XR32431EB devices
feature slew-rate limited outputs for reduced crosstalk and EMI.
The XR32430EH and XR32431EH devices are optimized for mid
speed applications, with data rates up to 460Kbps. The
XR32430EU and XR32431EU devices are optimized for high
speed designs with data rates up to 1Mbps, easily meeting the
demands of high speed RS-232 applications.
The XR32430/31 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 XR32430/31 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 (XR32431)
• 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/460Kbps/1Mbps min transmission
rates (speed grades B/H/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
Ordering Information – page 13
Typical XR32431 Application and Package Pinout
VL
VCC
0.1F
25
VL
26
VCC
0.1F
0.1F
0.1F
23 C1+
28 C1-
29 C2+
30 C2-
12 T1IN
Charge
Pump
V+ 26
V- 30
T1OUT 6
0.1F
0.1F
R1IN 1
R2IN 2
TTL/CMOS
Inputs
To -P Supervisor
Circuit
11 T2IN
10 T3IN
VCC
21 Shutdown
22 OnLine
20 Status
18 R1OUT
17 R2OUT
TTL/CMOS
Outputs
19 R2OUT
15 R3OUT
14 R4OUT
13 R5OUT
Auto On-line /
Control
5K
5K
5K
5K
5K
24
T2OUT 7
T3OUT 8
R1IN 1
R2IN 2
R3IN 3
R4IN 4
R5IN 5
RS-232
Outputs
RS-232
Inputs
R3IN 3
R4IN 4
R5IN 5
T1OUT 6
T2OUT
T3OUT
32
31
30
29
28
27
26
25
GND
C1-
XR32431
32 pin QFN (5x5mm)
R2OUT
18 R1OUT
17 R2OUT
© 2014 Exar Corporation
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