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PDF XR32220 Data sheet ( Hoja de datos )
| Número de pieza | XR32220 | |
| Descripción | 2-Driver/2-Receiver Intelligent RS-232 Transceiver | |
| Fabricantes | Exar | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de XR32220 (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
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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 VL pin
• AUTO ON-LINE circuitry automatically wakes up
from a 1A shutdown
• Regulated Charge Pump yields stable RS-232
Outputs regardless of VCC 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
0.1F
18
VL
19
VCC
0.1F
0.1F
0.1F
21 C1+
16 C1-
22 C2+
23 C2-
Charge
Pump
V+ 20
V- 24
0.1F
0.1F
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
1 / 13
exar.comXR32220
Rev 1A
1 page  
Pin Configuration
24 23 22 21 20 19
NC 1
18 VL
NC 2
17 GND
R1IN 3
16 C1-
R2IN 4
15 Online
T1OUT 5
14 Shutdown
T2OUT 6
13 Status
7 8 9 10 11 12
XR32220
Pin Assignments
Pin No.
Pin Name
1, 2, 7, 8 NC
3, 4 R1IN, R2IN
5, 6
9, 10
11, 12
13
T1OUT, T2OUT
T2IN, T1IN
R2OUT, R1OUT
Status
14 Shutdown
15 Online
16, 21
17
18
19
20
22, 23
24
-
C1-, C1+
GND
VL
VCC
V+
C2+, C2-
V-
Paddle
Type
Description
- No Connect (not connect to the die). Can be left floating or tied to GND or VCC.
Inputs
±15KV ESD Protected, RS-232 Receiver Inputs
(5K pull-dwn)
Output
±15KV ESD Protected, RS-232 Driver Output
Input
TTL/CMOS Driver Input
Output
TTL/CMOS Receiver Output
Output
TTL/CMOS level output indicating if no valid RS-232 levels are present at the R1IN or R2IN
input pins.
Input
TTL/CMOS level input, when driven low puts the XR32220 into shutdown mode (tri-stating
driver outputs and disabling the charge-pump); normal operation when driven high.
Input
TTL/CMOS level input. A low input enables Auto On-Line mode, a high input disables
Auto On-Line Mode.
Analog
Negative and positive terminals of voltage doubler charge pump capacitor.
Supply
Ground
Supply
I/O Power Supply
Supply
Power Supply
Analog
Analog
Analog
Supply
Regulated positive (+5.5V) charge pump rail.
Positive and negative terminals of the inverting charge pump capacitor.
Regulated positive (-5.5V) charge pump rail.
Ground. The exposed paddle on the bottom of package is connected to device ground. The
paddle should be connected to ground on pcb.
© 2014 Exar Corporation
5 / 13
exar.com/XR32220
Rev 1A
5 Page 
XR32220
Valid
RS-232
Level at
Receiver
Input
Yes
No
Yes
No
Yes
No
Table 2: XR32220 Operation Truth Table
Shutdown
OnLine
Driver Receiver
Outputs Outputs
Status
Mode of Operation
L x High-Z High-Z H Manually forced shutdown
L x High-Z High-Z L Manually forced shutdown
H L Active Active H Normal Operation
(Auto On-Line enabled)
H L High-Z Active L Standby Operation due to
Auto On-Line® circuitry
H H Active Active H Normal Operation
H H Active Active L Normal Operation
Table 3: XR32220 Driver and Receiver Truth Table
Shutdown
RxIN
RxOUT
TxIN
TxOUT
L x High-Z x High-Z
HLHLH
HHLHL
© 2014 Exar Corporation
11 / 13
exar.com/XR32220
Rev 1A
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet XR32220.PDF ] | |
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