XR32330
3-Driver/3-Receiver Intelligent RS-232 Transceiver
with 1.65V-5.5V Interface
General Description
FEATURES
The XR32330 product is a 3-driver/ 3-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 bar code scanners as well as point-of-sales terminals, security and industrial control
applications. The XR32330EBER device features slew-rate limited outputs for reduced crosstalk and EMI.
• Meets true EIA/TIA-232-F Standards from a
+3.0V to 5.5V power supply
•1.65V to 5.5V Logic Interface VL pin
• AUTO ON-LINE circuitry automatically wakes up
from a 1mA shutdown
• Regulated Charge Pump yields stable RS-232
Outputs regardless of VCC variations
The XR32330 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 XR32330 to
deliver compliant RS-232 performance from a single power supply ranging from +3.0V to +5.5V.
• 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)
• -40°C to 85°C ambient operating temperature
• Lead-free (RoHS 6) QFN package
The AUTO ON-LINE® feature allows the device to automatically "wakeup" 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.
APPLICATIONS
• Portable and Hand-Held Equipment
• Industrial and Process Control Equipment
• Point-Of-Sales Equipment
• Building Security and Automation
Ordering Information – Last Page
Typical Operating Circuit and Package Pinout
VC C
0.1F
C1+
22
C2+
C2-
23
9
TTL/CMOS
Inputs
C1-
V+
V-
0.1F
T1OUT 4
8
T2IN
T2OUT 5
7
T3IN
T3OUT 6
RS-232
Outputs
VC C
To -P Supervisor
Circuit
Auto On-line /
Control
R1IN 1
12 R1OUT
23
22
21
20
19
24
T1IN
14 Shutdown
15 OnLine
13 Status
24
20
0.1F
Charge
Pump
VCC
21
16
V+
VC C
C1+
0.1F
0.1F
19
VL
C2+
18
C2-
0.1F
V-
VL
R1IN
1
18
VL
R2IN
2
17
GND
R3IN
3
XR32330
16
C1-
T1OUT
4
24 pin QFN
(4x4mm)
15
ONLINE
T2OUT
5
14
SHUTDOWN
T3OUT
6
13
STATUS
R3IN 3
5K
GND
7
8
9
10
11
12
R1OUT
10 R3OUT
R2OUT
RS-232
Inputs
R3OUT
R2IN 2
5K
T1IN
11 R2OUT
T2IN
TTL/CMOS
Outputs
T3IN
5K
17
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maxlinear.comXR32330
Rev 1C
XR32330
Absolute Maximum Ratings
Operating Conditions
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.
Operating Temperature Range...................-40°C to +85°C
VCC Supply Range......................................... 3.0V to 5.5V
VL I/O Supply Range (VL ≤ VCC).................. 1.65V to 5.5V
Supply Voltage (VCC)..................................-0.3V to +6.0V
Logic Interface Voltage (VL).................................VL ≤ VCC
Thermal Information (24 Ld QFN (4x4mm))
V+................................................................-0.3V to +7.0V
JA .................................................................39.2 (°C/W)
V-.................................................................+0.3V to -7.0V
JC .................................................................15.3 (°C/W)
V+ + |V-| ....................................................................±13V
ICC (DC VCC or GND current)...............................±100mA
Junction Temperature...............................................125°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
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maxlinear.com/XR32330
Rev 1C
XR32330
Electrical Characteristics
Specifications are at TA = 25°C, VDD = 3.3V±10% or 5.0V±10%, VL = VDD; Limits applying over the full operating temperature range are denoted by a “•”. Typical values represent the most likely parametric norm at TA = 25°C, and are provided for
reference purposes only.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
DC CHARACTERISTICS
ICC1
Supply Current, AUTO
LINE® enabled
ICC2
ICC3
ON-
All RxIN open, ONLINE = GND, SHUTDOWN = VL, VCC = VL = 3.3V, TxIN =
VL or GND
•
1.0
10
µA
Supply Current, Shutdown
SHUTDOWN = GND, VCC = VL = 3.3V,
TxIN = VL or GND
•
1.0
10
µA
Supply Current, AUTO ONLINE® disabled
ONLINE = SHUTDOWN = VL, no load,
VCC = VL = 3.3V, TxIN = VL or GND
•
0.3
1.0
mA
TxIN, ONLINE, SHUTDOWN ;
1.65V ≤ VL ≤ 5.5V & VL ≤ VCC
•
1/3 * VL
V
LOGIC INPUTS AND OUTPUTS
VIL
Input Low Voltage
VIH
Input High Voltage
IIL
Input Leakage Current
TxIN, ONLINE, SHUTDOWN ; TAMB =
25°C, VIN = 0V to VL
IOL
Output Leakage Current
STATUS, RxOUT (Receivers disabled); VOUT = 0V to VL
•
VOL
Output Low Voltage
STATUS, RxOUT; IOUT = 1.5mA
•
VOH
Output High Voltage
STATUS, RxOUT; IOUT = -1.5mA
•
VL - 0.6
•
2/3 * VL
V
±0.01
±1.0
A
±0.05
±10
A
0.4
V
V
DRIVER OUTPUTS
VSWING
Output Voltage Swing
All drivers outputs loaded with 3K to
GND
•
±5.0
OR
Output Resistance
VCC = V+ = V- = 0V, VOUT = ±2V
•
300
IOSC
Output Short-Circuit Current
VOUT = 0V
•
IOL
Output Leakage Current
VCC = 0V or 3.0V to 5.5V, VOUT = ±12V
•
±5.4
V
±35
±60
mA
±25
A
+15
V
RECEIVER INPUTS
IVR
Input Voltage Range
VIL
Input Low Voltage
VIH
Input High Voltage
RxHYS
Receiver Input Hysteresis
RxR
Receiver Input Resistance
•
-15
VCC = 3.3V
•
0.6
1.2
V
VCC = 5.0V
•
0.8
1.5
V
VCC = 3.3V
•
1.5
2.4
V
VCC = 5.0V
•
1.8
2.4
V
0.3
•
3
5
V
7
K
+2.7
V
AUTO ON-LINE CIRCUITRY CHARACTERISTICS (ONLINE = GND, SHUTDOWN = VL , VL = VCC)
RxSTSH
Receiver Threshold to STATUS high
level
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•
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maxlinear.com/XR32330
Rev 1C
XR32330
Symbol
Parameter
Conditions
Min
•
Typ
-0.3
Max
Units
+0.3
V
RxSTSL
Receiver Threshold to STATUS low
level
tSTSH
Receiver Threshold to STATUS high
Figure 9
0.2
s
tSTSL
Receiver Threshold to STATUS low
Figure 9
30
s
tONLINE
Receiver Thresholds to Drivers
Enabled
Figure 9, (charge pump fully discharged
when receiver threshold crossed)
30
s
tOFFLINE
Receiver Thresholds to Drivers Disabled
Figure 9
35
s
TIMING CHARACTERISTICS
fMAX
Maximum Output Frequency
RL = 3K, CL = 1000pF, 1 driver active
tPHL
Receiver Propagation Delay (high to
low)
Receiver input (
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