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 MaxLinear’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
V
L
0.1µF
V
CC
0.1µF
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 pin
L
■■
AUTO ON-LINE circuitry automatically
wakes up from a 1µA 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 125°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
18
V
L
19
V
CC
0.1µF
0.1µF
21
16
22
23
C1+
C1-
C2+
C2-
V+
Charge
Pump
20
0.1µF
V-
24
0.1µF
10
TTL/CMOS
Inputs
T1IN
T1OUT 5
RS-232
Outputs
24
23
22
21
20
9
V
CC
T2IN
T2OUT 6
VCC
19
C2+
C1+
C2-
V+
V-
NC
NC
1
18
VL
GND
C1-
Online
Shutdown
Status
2
17
To
µ-P
Supervisor
Circuit
14 Shutdown
15 OnLine
13 Status
Auto On-line /
Control
R1IN
R2IN
T1OUT
3
XR32220
24 pin QFN
(4x4mm)
16
4
15
5
14
12 R1OUT
TTL/CMOS
Outputs
5KΩ
R1IN 3
RS-232
Inputs
T2OUT
6
13
R2OUT
5KΩ
GND
17
Figure 1. Typical Application
REV1D
Figure 2. Package Pinout
1/13
R1OUT
NC
NC
11 R2OUT
R2IN 4
7
8
9
10
11
12
T2IN
T1IN
XR
32220
Absolute Maximum Ratings
Stresses beyond those listed under Absolute Maximum
Ratings may cause permanent damage to the device.
Exposure to any Maximum Rating condition for extended
periods may affect device reliability and lifetime.
Supply Voltage (V
CC
) ................................... -0.3V to +6.0V
Logic Interface Voltage (V
L
) ..................................V
L
≤ V
CC
V+ ................................................................. -0.3V to +7.0V
V- .................................................................. +0.3V to -7.0V
V+ + |V-| ...................................................................... ±13V
ICC (DC V
CC
or GND current) ................................ ±100mA
Maximum Junction Temperature ............................... 150°C
Input Voltages
TxIN, ONLINE, Shutdown............................. -0.3V to +6.0V
RxIN............................................................................. ±15V
Output Voltage
TxOUT ...................................................................... ±13.2V
RxOUT, Status ............................................. -0.3V to +6.0V
Short-Circuit Duration
TxOUT ............................................................... Continuous
Storage Temperature ................................ -65°C to +150°C
ESD Rating RS-232 Bus pins
HBM - Human Body Model ........................................ ±15kV
IEC614000-4-2 Air Discharge.................................... ±15kV
IEC614000-4-2 Contact Discharge.............................. ±8kV
Thermal Information (24 Ld QFN (4x4mm))
θ
JA
......................................................................39.2(°C/W)
Operating Conditions
Operating Temperature Range.................. -40°C to +125°C
V
CC
Supply Range ...........................................3.0V to 5.5V
V
L
I/O Supply Range (V
L
≤ V
CC
) ....................1.65V to 5.5V
θ
JC
......................................................................15.3(°C/W)
REV1D
2/13
XR
32220
Electrical Characteristics
Unless otherwise noted: T
A
= -40°C to +125°C, V
CC
= 3.3V ± 10% or 5.0V ± 10%, V
L
= V
CC
. Limits applying over the full
operating temperature range are denoted by a •.
Symbol
Parameter
Conditions
•
Min
Typ
Max
Units
DC CHARACTERISTICS
I
CC1
I
CC2
I
CC3
Supply Current, Auto On-Line enabled
Supply Current, Shutdown
Supply Current, Auto On-Line disabled
All RxIN open, Online = GND, Shutdown
= V
L
, V
CC
= V
L
= 3.3V, TxIN = V
L
or
GND
Shutdown = GND, V
CC
= V
L
= 3.3V,
TxIN = V
L
or GND
Online = Shutdown = V
L
, no load, V
CC
=
V
L
= 3.3V, TxIN = V
L
or GND
•
•
•
1.0
1.0
0.3
10
10
1.0
µA
µA
mA
LOGIC INPUTS AND OUTPUTS
V
IL
V
IH
I
IL
I
OL
V
OL
V
OH
Input Low Voltage
Input High Voltage
Input Leakage Current
Output Leakage Current
Output Low Voltage
Output High Voltage
TxIN, Online, Shutdown; 1.65V ≤ V
L
≤
5.5V & V
L
≤ V
CC
TxIN, Online, Shutdown; T
AMB
= 25°C,
V
IN
= 0V to V
L
Status, RxOUT (Receivers disabled);
V
OUT
= 0V to V
L
Status, RxOUT; I
OUT
= 1.5mA
Status, RxOUT; I
OUT
= -1.5mA
•
•
•
V
L
- 0.6
•
•
2/3 * V
L
±0.01
±0.05
±1.0
±10
0.4
1/3 * V
L
V
V
µA
µA
V
V
DRIVER OUTPUTS
V
SWING
O
R
I
OSC
I
OL
Output Voltage Swing
Output Resistance
Output Short-Circuit Current
Output Leakage Current
All drivers outputs loaded with 3KΩ to
GND
V
CC
= V+ = V- = 0V, V
OUT
= ±2V
V
OUT
= 0V
V
CC
= 0V or 3.0V to 5.5V, V
OUT
= ±12V
•
•
•
•
±5.0
300
±35
±60
±25
±5.4
V
Ω
mA
µA
RECEIVER INPUTS
IVR
V
IL
Input Voltage Range
Input Low Voltage
V
CC
= 3.3V
V
CC
= 5.0V
V
CC
= 3.3V
V
CC
= 5.0V
•
•
•
•
•
-15
0.6
0.8
1.2
1.5
1.5
1.8
0.3
•
3
5
7
2.4
2.4
+15
V
V
V
V
V
V
KΩ
V
IH
RX
HYS
RX
R
Input High Voltage
Receiver Input Hysteresis
Receiver Input Resistance
REV1D
3/13
XR
32220
Electrical Characteristics (Continued)
Unless otherwise noted: T
A
= -40°C to +125°C, V
CC
= 3.3V ± 10% or 5.0V ± 10%, V
L
= V
CC
. Limits applying over the full
operating temperature range are denoted by a •.
Symbol
Parameter
Conditions
•
Min
Typ
Max
Units
AUTO ON-LINE CIRCUITRY CHARACTERISTICS (ONLINE = GND, SHUTDOWN = V
L
, V
L
= V
CC
)
RX
STSH
RX
STSL
t
STSH
t
STSL
t
ONLINE
t
OFFLINE
Receiver Threshold to STATUS high level
Receiver Threshold to STATUS low level
Receiver Threshold to STATUS high
Receiver Threshold to STATUS low
Receiver Thresholds to Drivers Enabled
Receiver Thresholds to Drivers Disabled
Figure 11
Figure 11
Figure 11, (charge pump fully
discharged when receiver threshold
crossed)
Figure 11
•
•
-2.7
-0.3
0.2
30
30
35
+2.7
+0.3
V
V
µs
µs
µs
µs
TIMING CHARACTERISTICS
f
MAX
t
PHL
t
PLH
t
RXSKEW
t
RXOE
t
RXOD
t
TXSKEW
Maximum Output Frequency (Speed U)
Maximum Output Frequency (Speed B)
Receiver Propagation Delay (high to low)
Receiver Propagation Delay (low to high)
Receiver Skew
Receiver Output Enable Time
Receiver Output Disable Time
Driver Skew (Speed U)
Driver Skew (Speed B)
Transition-Region Slew Rate (Speed U)
TX
SLEW
Transition-Region Slew Rate (Speed B)
R
L
= 3KΩ, C
L
= 250pF, 1 driver active
R
L
= 3KΩ, CL = 1000pF, 1 driver active
Receiver input (<10ns rise/fall) to
Receiver output, C
L
= 150pF
Receiver input (<10ns rise/fall) to
Receiver output, C
L
= 150pF
|t
PHL
- t
PLH
|
Normal operation
Normal operation
|t
PHL
- t
PLH
| (Driver propagation delays)
|t
PHL
- t
PLH
| (Driver propagation delays)
V
CC
= 3.3V, R
L
= 3KΩ to 7KΩ, C
L
=
150pF to 250pF, Measured from -3.0V
to +3.0V or +3.0V to -3.0V
V
CC
= 3.3V, R
L
= 3KΩ to 7KΩ, C
L
=
150pF to 1000pF, Measured from -3.0V
to +3.0V or +3.0V to -3.0V
•
6
•
•
•
•
1000
250
0.15
0.15
50
200
200
50
100
90
100
500
Kbps
Kbps
µs
µs
ns
ns
ns
ns
ns
V/µs
30
V/µs
REV1D
4/13
XR
32220
Pin Configuration
VCC
19
C2+
C1+
21
C2-
24
23
22
V+
20
V-
NC
NC
R1IN
R2IN
T1OUT
T2OUT
1
18
VL
GND
C1-
Online
Shutdown
Status
2
17
3
16
4
15
5
14
6
13
7
8
9
10
11
12
R2OUT
Pin Functions
Pin Number
1, 2, 7, 8
3, 4
5, 6
9, 10
11, 12
13
14
15
16, 21
17
18
19
20
22, 23
24
-
Pin Name
NC
R1IN, R2IN
T1OUT, T2OUT
T2IN, T1IN
R2OUT, R1OUT
Status
Shutdown
Online
C1-, C1+
GND
VL
VCC
V+
C2+, C2-
V-
Paddle
Type
-
Inputs
(5KΩ pull-down)
Output
Input
Output
Output
Input
Input
Analog
Supply
Supply
Supply
Analog
Analog
Analog
Supply
Description
No Connect (not connect to the die). Can be left floating or tied to GND or V
CC
.
±15KV ESD Protected, RS-232 Receiver Inputs.
±15KV ESD Protected, RS-232 Driver Output.
TTL/CMOS Driver Input.
TTL/CMOS Receiver Output.
TTL/CMOS level output indicating if no valid RS-232 levels are present at the R1IN or R2IN
input pins.
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.
TTL/CMOS level input. A low input enables Auto On-Line mode, a high input disables Auto
On-Line Mode.
Negative and positive terminals of voltage doubler charge pump capacitor.
Ground.
I/O Power Supply.
Power 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.
R1OUT
NC
NC
T2IN
T1IN
REV1D
5/13
stm32/stm8
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