UM3221E [UNIONSEMI]
Fail-Safe, Single Supply RS-232 Transceivers;
| 型号： | UM3221E |
| 厂家： | 
Union Semiconductor, Inc. |
| 描述： | Fail-Safe, Single Supply RS-232 Transceivers |
| 文件： | 总15页 (文件大小：236K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UM3221E/UM3222E/UM3232E
Fail-Safe, Single Supply RS-232 Transceivers
UM3221E/UM3222E/UM3232E
General Description
The UM3221E/UM3222E/UM3232E series are 3.3V powered RS-232 transceivers intended for
portable or hand-held applications. The UM3221E has one driver/one receiver while the
UM3222E/UM3232E has two drivers/two receivers. The device features low power consumption,
high data-rate capability and enhanced ESD protection. The ESD rating of all transmitter outputs
and receiver inputs is ±15kV for both human body mode and IEC61000-4-2 air discharge methods,
and over ±8kV for IEC61000-4-2 contact discharge methods. The logic I/O pins are protected to
±2kV for human body mode.
Small footprint, low profile package and the use of small 0.1μF capacitors ensure board space
savings as well. Data rates greater than 250kbps are guaranteed at worst case load conditions. This
family is fully compatible with 3.3V-only systems, mixed 1.8V and 3.3V systems, mixed 3.3V and
5.0V systems and 5.0V-only systems.
The UM3221E/UM3222E has a low-power shutdown mode where the devices’ driver outputs and
charge pumps are disabled. During shutdown, the supply current falls to less than 1μA that
reduces power consumption in battery-powered portable systems or other low power consumption
systems. The UM3221E/UM3222E receivers remain active in shutdown mode, allowing
monitoring of external signals.
The UM3221E/UM3222E and UM3232E are pin, package, and functionally compatible with the
industry standard MAX242 and MAX 232, respectively.
Applications
Industrial Automation Equipments
Battery-Powered Equipments
Hand-Held Equipments
POS Terminals
Features
Meets True EIA/TIA-232-F Standards from a +3.0V to +5.5V Power Supply
Meets EIA/TIA-562 Levels of ±3.7V with Supply Voltages as Low as 2.7V
Enhanced ESD Specifications:
±15kV Human Body Mode
±15kV IEC61000-4-2 Air Discharge Mode
±8kV IEC61000-4-2 Contact Discharge Mode
1μA Low Power Shutdown (UM3221E/UM3222E)
250kbps Minimum Transmission Rate
Guaranteed 30V/μs Max Slew Rate
Latch-Up Performance Exceeds 200mA
Hot Swap and Fail-Safe
I/O Logic Compatible with 1.8V Logic @ Vcc=3.3V
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http://www.union-ic.com Rev.06 Dec.2013 1/15
UM3221E/UM3222E/UM3232E
Ordering Information
Part Number
UM3221EEAE
UM3221EEUE
UM3222EEUE
UM3232EESE
UM3232EEPE
UM3232EEUE
UM3232EEAE
Temp. Range
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
Package Type
SSOP16
TSSOP16
TSSOP20
SOP16
DIP16
TSSOP16
SSOP16
Absolute Maximum Ratings (Note 1)
Symbol
Parameter
Value
Unit
VCC
V+
Supply Voltage on VCC
Voltage on V+
-0.3 to +6
(VCC - 0.3) to +7.5
-7.5 to +0.3
-0.3 to (VCC + 0.3)
±30
V
V
V
V
V
V
V
V-
Voltage on V-
T_IN
R_IN
T_OUT
R_OUT
Voltage on T_IN
Voltage on R_IN
Voltage on T_OUT
Voltage on R_OUT
Short-Circuit Duration, T_OUT
(V- - 0.3) to (V+ + 0.3)
-0.3 to (VCC + 0.3)
Continuous
775
SSOP16
TSSOP20
SOP16
879
Continuous Power Dissipation
at TA = 70°C
PD
mW
696
DIP16
842
TSSOP16
754
TA
Operating Temperature Range
Storage Temperature Range
-40 to +85
-65 to +165
°C
°C
TSTG
Maximum Lead Temperature for soldering
10 seconds
TL
+300
°C
Note 1: Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent
damage to the device. These are stress ratings only, and functional operation of the device at these
or any other conditions beyond those indicated in the operational sections of the specifications is
not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
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UM3221E/UM3222E/UM3232E
Electrical Characteristics
(VCC=+3.0V to +5.5V, C1- C4=0.1μF, TA=TMIN to TMAX, unless otherwise noted. Typical values
are at TA=25℃)
Parameter
Symbol
Conditions
Min
Typ
Max Unit
DC CHARACTERISTICS ( VCC=+3.3V or +5V, TA=25℃)
VCC Supply Current
Shutdown Supply
Current
ICC
/SHDN= VCC, No load
/SHDN= GND
0.3
1
1
mA
ISHDN
μA
LOGIC INPUTS
Input Leakage Current
T_IN, /SHDN, /EN
±1
0.8
0.8
μA
VCC = 3.3V
T_IN,
Input Threshold Low
Input Threshold High
VIL
VIH
V
/SHDN, /EN
VCC = 5.0V
VCC = 3.3V
1.6
2.2
T_IN,
V
V
/SHDN, /EN
VCC = 5.0V
VCC = 3.3V
0.2
Transmitter
Input Hysteresis
VCC = 5.0V
0.15
RECEIVER OUTPUTS
VCC = 3.3V, IOUT = 10mA
VCC = 5.0V, IOUT = 10mA
VCC = 3.3V, IOUT = -3.0mA
VCC = 5.0V, IOUT = -3.0mA
0.8
0.8
Output Voltage Low
VOL
VOH
V
V
2.8
4.4
Output Voltage High
RECEIVER INPUTS
Input Voltage Range
-30
0.8
0.8
30
V
V
V
CC = 3.3V
VCC = 5.0V
CC = 3.3V
VCC = 5.0V
1.15
1.55
1.35
1.75
0.2
Input Threshold Low
Input Threshold High
TA = +25°C
TA = +25°C
V
2
2
V
Input Hysteresis
Input Resistance
V
TA = +25°C
3
5
7
kΩ
TRANSMITTER OUTPUTS
All drivers loaded with 3kΩ
Output Voltage Swing
±5.0
±6.0
±30
V
to ground
Short to
VCC , GND
or other TXD
pin
VCC = 3.3V
VCC = 5.0V
±60
±60
mA
Output Short-Circuit
Current
±40
mA
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UM3221E/UM3222E/UM3232E
Electrical Characteristics (Continued)
(VCC=+3.0V to +5.5V, C1- C4=0.1μF, TA=TMIN to TMAX, unless otherwise noted. Typical values
are at TA=25℃)
Parameter
Symbol
Conditions
Min
Typ
Max Unit
TIMING CHARACTERISTICS
RL = 3kΩ to 7kΩ,
CL = 50pF to 1000pF,
one transmitter switching
Maximum Data Rate
250
kbps
All parts,
CL = 150pF
normal
Receiver Propagation
tPLH, tPHL
0.15
μs
Delay
Figure 1
operation
Receiver Skew
|tPHL-tPLH
|
0.1
μs
μs
μs
RL = 3kΩ,
CL = 2500pF,
all transmitters loaded
Figure 1
Transmitter
Propagation Delay
tPLH, tPHL
0.9
15
Transmitter Skew
|tPHL-tPLH
|
0.1
30
TA = +25°C, VCC = 3.3V,
RL = 3kΩ to 7kΩ, CL = 50pF
to 1000pF, measured from
-3V to +3V or +3V to -3V,
Figure 1
Transition-Region
Slew Rate
3
V/μs
ESD AND LATCH UP PERFORMANCE
Human Body Model
±15
±8
R_IN, T_OUT
ESD-Protection
Voltage
IEC61000-4-2,
Contact Discharge
IEC61000-4-2,
kV
±15
±2
Air-Gap Discharge
Logic Pin
ESD-Protection
Voltage
Human Body Model
kV
Latch Up Performance
JEDEC Standard No.78D
±200
mA
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UM3221E/UM3222E/UM3232E
Pin Configurations
SSOP16/TSSOP16
Pin Description
TSSOP20
Pin Name
SOP16/DIP16/TSSOP16/SSOP16
Pin No.
Function
UM3221E UM3222E UM3232E
______
1
1
-
Receiver Enable. Active low.
EN
Positive terminals of voltage-doubler
charge pump capacitor
Positive voltage generated by the charge
pump
Negative terminals of voltage-doubler
charge pump capacitor
Positive terminals of inverting charge
pump capacitor
Negative terminals of inverting charge
pump capacitor
Negative voltage generated by the
charge pump
2
2
1
C1+
V+
3
4
5
6
7
3
4
5
6
7
2
3
4
5
6
C1-
C2+
C2-
V-
13
8
9
11
14
15
8, 17
9, 16
10, 15
12, 13
18
7, 14
8, 13
9, 12
10, 11
15
T_OUT
R_IN
R_OUT
T_IN
GND
VCC
RS-232 Driver Outputs
RS-232 Receiver Inputs
RS-232 Receiver Outputs
RS-232 Driver Inputs
Ground
+3.0V to +5.5V Supply Voltage Input
Shut off pump power and transmitters.
Active low.
19
16
____________
16
20
-
SHDN
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UM3221E/UM3222E/UM3232E
Detailed Description
Dual Charge-Pump Voltage Converter
The UM3221E/UM3222E/UM3232Es’ internal power supply consists of a regulated dual charge
pump and provides output the maxim voltages of +7V (doubling charge pump) and -7V (inverting
charge pump) over the +3.0V to +5.5V VCC range. The charge pump operates in discontinuous
mode; if the output voltages are less than 7V, the charge pump is enabled, and if the output
voltages exceed 7V, the charge pump is disabled. The charge pumps require only four small,
external 0.1μF capacitors for the voltage doubler and inverter functions (see Figure 2).
RS-232 Transmitters
The transmitters are inverting level translators that translate TTL/CMOS inputs to EIA/TIA-232
output levels. All UM3221E/UM3222E/UM3232E transmitters guarantee a 250kbps data rate for
full load conditions (3kΩ and 1000pF). Transmitters can be paralleled to drive multiple receivers.
RS-232 Receivers
The receivers convert RS-232 signals to CMOS output levels and accept inputs up to ±30V while
presenting the required 3kΩ to 7kΩ input impedance. The UM3221E/UM3222E receivers have
______
inverting three-state outputs. Drive EN high to place the receivers into a high impedance state.
______
Receivers can be either active or inactive in shutdown state depending on EN status.
UM3221E/UM3222E
____________
Supply current falls to less than 1μA in shutdown mode (SHDN = GND). When shutdown, the
device’s charge pumps are shut off, V+ is pulled down to VCC, V- is pulled to ground, and the
transmitter outputs are disabled (high impedance). The time required to recover from shutdown is
____________
____________
typically 100μs. Connect SHDN to VCC if shutdown mode is not used. SHDN has no effect on
R_OUT.
±15kV ESD Protection
All pins on UM3221E/UM3222E/UM3232E devices include ESD protection structures, but the
family incorporates advanced structures which allow the RS-232 pins (transmitter outputs and
receiver inputs) to survive ESD events up to ±15kV. The RS-232 pins are particularly vulnerable
to ESD damage because they are typically connected to an exposed port on the exterior of the
finished product. The ESD structures withstand high ESD in all states: normal operation,
shutdown and powered down. After an ESD event, circuits keep working without latch up. ESD
protection can be tested in various ways; the transmitter outputs and receiver inputs are
characterized for protection to the following limits: ±15kV using the Human Body Model, ±8kV
using the Contact Discharge method specified in IEC61000-4-2, ±15kV using the Air-Gap
Discharge method specified in IEC61000-4-2. The logic pins are characterized for protection to
the following limit: ±2kV using the Human Body Model.
Hot Swap and Fail-Safe
The UM3221E/UM3222E/UM3232E guarantees a logic-high receiver output when the receiver
inputs are shorted to GND or open, or when they are connected to a line with no driver enabled.
Because of the latch-up characteristics and all sort protection, UM3221E/UM3222E/UM3232E
support hot swap.
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UM3221E/UM3222E/UM3232E
Test Circuits
Figure 1
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UM3221E/UM3222E/UM3232E
Typical Operating Circuits
+
+3.3V
+
+3.3V
+
+
C5
C3
3
C5
C3
3
19
VCC
15
2
2
VCC
V+
V-
C1+
V+
V-
C1+
+
+
+
+
C1
C2
C1
C2
4
5
4
5
C1-
C4
+
C1-
C4
+
UM3222E
7
UM3221E
7
C2+
C2+
6
6
C2-
C2-
+3.3V
400k
+3.3V
400k
T1OUT 17
13
T1IN
13
8
T1OUT
11
9
T1IN
TTL/CMOS
INPUT
RS-232
OUTPUT
+3.3V
400k
RS-232
OUTPUTS
TTL/CMOS
INPUTS
R1IN
5k
R1OUT
RS-232
INPUT
TTL/CMOS
OUTPUT
T2OUT
8
T2IN
12
15
R1IN
5k
R1OUT
16
TTL/CMOS
OUTPUTS
RS-232
INPUTS
16
1
EN
SHDN
R2IN
R2OUT
EN
9
10
1
GND
14
5k
20
SHDN
GND
18
+
+3.3V
+
C5
C3
16
VCC
2
6
1
V+
V-
C1+
+
+
C1
C2
3
4
C1-
C4
+
UM3232E
C2+
5
C2-
+3.3V
400k
T1OUT 14
11
T1IN
+3.3V
400k
RS-232
OUTPUTS
TTL/CMOS
INPUTS
T2OUT
7
T2IN
10
12
R1IN
5k
R1OUT
13
TTL/CMOS
OUTPUTS
RS-232
INPUTS
R2IN
5k
R2OUT
8
9
GND
15
Figure 2
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UM3221E/UM3222E/UM3232E
Typical Operating Characteristics
(VCC=+3.3V, 250kbps data rate, 0.1uF capacitors, all transmitters loaded with 3kΩ and CL,
TA=25℃, unless otherwise noted.)
Transmitter Output Voltage vs. Supply Voltage
V+,V- vs. Supply Voltage
8
6
8
6
4
4
2
2
VOUT+
Transmitting at 250kbps
CL=1000pF
Transmitting at 250kbps
CL=1000pF
V+
V-
VOUT-
0
0
-2
-4
-6
-8
-2
-4
-6
-8
2
2.5
3
3.5
4
4.5
5
2.4
2.8
3.2
3.6
4
4.4
4.8
5.2
5.6
6
Supply Voltage(V)
Supply Voltage (V)
Supply Current vs.Supply Voltage
Transmitter Output Voltage vs. Load Capacitance
35
8
6
4
2
0
30
25
20
15
VOUT+
VOUT-
Transmitting at 250kbps
CL=1000pF
Transmitting at 20kbps
-2
-4
-6
-8
0
500
1000
1500
2000
2500
3000
2
2.5
3
3.5
4
4.5
5
5.5
6
Supply Voltage(V)
Load Capacitance (pF)
Supply Current vs. Load Capacitance
Slew Rate vs. Load Capacitance
25
23
21
19
17
15
30
25
20
15
10
5
+Slew
-Slew
Transmitting at 20kbps
Transmitting at 20kbps
0
0
500
1000
1500
2000
2500
3000
0
500
1000
1500
2000
2500
3000
Load Capacitance (pF)
Load Capacitance (pF)
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UM3221E/UM3222E/UM3232E
Applications Information
Capacitor Selection
The capacitor type used for C1–C4 is not critical for proper operation; polarized or non-polarized
capacitors can be used. The charge pump requires 0.1μF capacitors for 3.3V operation. Increasing
the capacitor values (e.g. by a factor of 2) reduces ripples on the transmitter outputs and slightly
reduces power consumption. C2, C3 and C4 can be increased without changing C1’s value. When
using the minimum required capacitor values, make sure the capacitor value does not degrade
excessively with temperature. If in doubt, use capacitors with a larger nominal value. The
capacitor’s equivalent series resistance (ESR), which usually rises at low temperatures, influences
the amount of ripples on V+ and V- output voltages.
Power Supply Decoupling
In most circumstances, a 0.1μF VCC bypass capacitor is adequate. In applications sensitive to
power-supply noise, use a capacitor of the same value as charge pump capacitor C1. Connect
bypass capacitors to the IC as close as possible.
Operation down to 2.7V
Transmitter outputs meet EIA/TIA-562 levels of ±3.7V with supply voltages as low as 2.7V.
Interconnection with 3V and 5V Logic
The UM3221E/UM3222E/UM3232E can directly interface with various 3V and 5V logic families,
including ACT and HCT CMOS.
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UM3221E/UM3222E/UM3232E
Package Information
SOP16
Outline Drawing
D
L
e
b
DIMENSIONS
MILLIMETERS
INCHES
Symbol
Min
Max
1.75
0.25
0.49
0.25
4.00
5.00
8.75
10.00
Min
Max
0.069
0.010
0.019
0.010
0.157
0.197
0.344
0.394
A
A1
b
C
1.35
0.10
0.35
0.19
3.80
4.80
8.55
9.80
0.053
0.004
0.014
0.007
0.150
0.189
0.337
0.386
E
D (8 PIN)
D (14 PIN)
D (16 PIN)
e
H
L
1.27
0.050
5.80
0.40
6.20
1.27
0.228
0.016
0.244
0.050
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UM3221E/UM3222E/UM3232E
DIP16
Outline Drawing
DIMENSIONS
MILLIMETERS
INCHES
Symbol
Min
-
Max
5.08
-
Min
-
Max
0.200
-
A
A1
A2
A3
b
b1
C
0.38
3.18
1.40
0.41
1.14
0.20
8.84
18.67
18.92
0.13
7.62
6.10
2.54
7.62
-
0.015
0.125
0.055
0.016
0.045
0.008
0.348
0.735
0.745
0.005
0.300
0.240
0.100
0.300
-
4.45
2.03
0.56
1.65
0.30
9.91
19.43
19.43
2.03
8.26
7.87
-
0.175
0.080
0.022
0.065
0.012
0.390
0.765
0765
0.080
0.325
0.310
-
D (8 PIN)
D (14 PIN)
D (16 PIN)
D1
E
E1
e
eA
eB
L
-
-
10.16
3.81
0.400
0.150
2.92
0.115
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UM3221E/UM3222E/UM3232E
TSSOP16/TSSOP20
Outline Drawing
DIMENSIONS
MILLIMETERS
INCHES
Symbol
Min
-
Max
1.20
0.15
1.05
0.54
5.06
6.60
6.60
4.50
0.28
Min
-
Max
0.047
0.006
0.041
0.021
0.199
0.264
0.264
0.177
0.011
A
A1
0.05
0.90
0.34
4.86
6.40
6.20
4.30
0.20
0.002
0.035
0.013
0.191
0.256
0.248
0.169
0.008
A2
A3
D(16 PIN)
D(20 PIN)
E
E1
b
e
0.65BSC
0.026BSC
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UM3221E/UM3222E/UM3232E
SSOP16
Outline Drawing
DIMENSIONS
MILLIMETERS
INCHES
Symbol
Min
-
Max
2.00
-
Min
-
Max
0.079
-
A
A1
A2
D
0.05
1.65
5.90
7.40
5.00
0.22
0.002
0.065
0.232
0.291
0.197
0.009
1.85
6.50
8.20
5.60
0.38
0.073
0.256
0.323
0.220
0.015
E
E1
b
e
0.65(BSC)
0.026(BSC)
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UM3221E/UM3222E/UM3232E
IMPORTANT NOTICE
The information in this document has been carefully reviewed and is believed to be
accurate. Nonetheless, this document is subject to change without notice. Union assumes
no responsibility for any inaccuracies that may be contained in this document, and makes
no commitment to update or to keep current the contained information, or to notify a
person or organization of any update. Union reserves the right to make changes, at any
time, in order to improve reliability, function or design and to attempt to supply the best
product possible.
Union Semiconductor, Inc
Add: 2F, No. 3, Lane 647 Songtao Road, Shanghai 201203
Tel: 021-51093966
Fax: 021-51026018
Website: www.union-ic.com
________________________________________________________________________
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15/15
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ETC
UM322S
Analog ICWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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ETC
UM323
Analog ICWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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ETC
UM3230
Consumer ICWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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ETC
UM3231H
Consumer ICWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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ETC
UM3232EEAE
Fail-Safe, Single Supply RS-232 TransceiversWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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UNIONSEMI
UM3232EEPE
Fail-Safe, Single Supply RS-232 TransceiversWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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UNIONSEMI
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