UM232EESE_15 [UNIONSEMI]
High ESD-Protected, Fail-Safe, Single Supply RS-232 Transceivers;
| 型号： | UM232EESE_15 |
| 厂家： | 
Union Semiconductor, Inc. |
| 描述： | High ESD-Protected, Fail-Safe, Single Supply RS-232 Transceivers |
| 文件： | 总11页 (文件大小：318K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UM232EExE
High ESD-Protected, Fail-Safe, Single Supply
RS-232 Transceivers
UM232EESE SOP16
UM232EEPE DIP16
UM232EEUE TSSOP16
General Description
The UM232EExE series are low power single supply RS232 interface. The device consists of two
line drivers, two line receivers, and dual charge pump circuit. The device meets the requirements
of TIA/EIA-232 standard and provides the electrical interface between an asynchronous
communication controller and the serial-port connector. The on chip charge pump and four small
external capacitors act as onboard DC to DC converter, allow chip operated from single 5V
supply, eliminating the need for ±10V power supplies, reduce cost and board space. The device
operates at data signaling rates over 250kbps. The slew rate of driver is set internally less than
30V/μs and the receivers feature internal noise filtering, eliminating the need for external slew
rate and filter capacitors for reliable operation. The driver inputs and receiver outputs are TTL and
CMOS compatible. UM232EExE comes in 16 pin DIP, SOP and TSSOP packages, operating over
the commercial and industrial temperature ranges.
The ESD tolerance has been upgraded on these devices to over ±15KV for both Human Body
Model and IEC61000-4-2 Air Discharge Method, without latch-up. The device operates with four
0.1μF capacitors, reduce system cost and board space.
Applications
Features
ESD Protection for RS-232 Bus Pins up to
±15kV Human Body Model
Single +5V Power Supply
Low Power, ICC 15mA Maximum
Operates up to 250kbps
Receiver Noise Filter
Notebook and Palmtop Computers
Battery-Powered Equipments
Hand-Held Equipments
POS Terminals
Latch-Up Performance Exceeds 200mA
Ordering Information
Shipping Qty
2500pcs/13 Inch
Tape & Reel
Part Number
UM232EESE
UM232EEPE
UM232EEUE
Temp. Range
Marking Code
UM232EESE
UM232EEPE
UM232EEUE
Package Type
SOP16
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
25pcs/Tube
DIP16
3000pcs/13 Inch
Tape & Reel
TSSOP16
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UM232EExE
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 +14
-14 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
696
SOP16
Continuous Power Dissipation
at TA = 70°C
PD
DIP16
842
mW
TSSOP16
754.7
TA
Operating Temperature Range
Storage Temperature Range
-40 to +85
°C
°C
TSTG
-65 to +165
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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UM232EExE
Electrical Characteristics
(VCC=+5V±10%, C1- C4=0.1uF, TA=TMIN to TMAX, unless otherwise noted. Typical values are at
TA=25℃)
Parameter
Symbol
Conditions
Min
Typ
Max Unit
DC CHARACTERISTICS
VCC Supply Current
LOGIC
ICC
No load, TA = +25°C
10
15
mA
Input Leakage Current
Input Threshold Low
T_IN = 0V to VCC
T_IN
±10
0.8
μA
V
VIL
Input Threshold High
Output Voltage Low
Output Voltage High
Output Leakage
Current
VIH
VOL
VOH
T_IN
2.0
3.5
V
V
V
R_OUT; IOUT = 3.2mA
R_OUT; IOUT = -1.0mA
0.4
±10
30
VCC-0.4
±0.05
0V ≤ ROUT≤ VCC
μA
EIA/TIA-232E RECEIVER INPUTS
Input Voltage Range
-30
0.8
V
V
TA = +25°C,
Normal
operation
Normal
Input Threshold Low
Input Threshold High
1.2
1.7
VCC = 5V
TA = +25°C,
VCC = 5V
2.4
V
operation
Input Hysteresis
Input Resistance
VCC = 5V
TA = +25°C, VCC = 5V
0.2
3
0.5
5
1.0
7
V
kΩ
EIA/TIA-232E TRANSMITTER OUTPUTS
All drivers loaded with 3kΩ
Output Voltage Swing
Output Resistance
±5
±9
V
Ω
to ground
VCC = V+ = V- = 0V,
300
VOUT = ±2V
Output Short-Circuit
Current
short to VCC , GND
or other TXD pin
±70
mA
TIMING CHARACTERISTICS
RL = 3kΩ to 7kΩ,
CL = 50pF to 1000pF,
one transmitter switching
Maximum Data Rate
250
kbps
μs
All parts,
CL = 150pF
normal
Receiver Propagation
Delay
tPLHR
,
0.3
1.2
tPHLR
Figure 1
operation
RL = 3kΩ, CL = 2500pF,
all transmitters loaded
Figure 1
Transmitter
Propagation Delay
tPLHT
,
μs
tPHLT
TA = +25°C, VCC = 5V,
RL = 3kΩ to 7kΩ,
CL = 50pF to 1000pF,
measured from -3V to +3V
or +3V to -3V,
Transition-Region
Slew Rate
20
30
V/μs
Figure 1
ESD PERFORMANCE
TRANSMITTER OUTPUTS, RECEIVER INPUTS
Human Body Model
±15
±8
IEC61000-4-2,
Contact Discharge
IEC61000-4-2,
ESD-Protection
Voltage
kV
±15
Air-Gap Discharge
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UM232EExE
Pin Configurations
UM232E
SOP16/DIP16/TSSOP16
Pin Descriptions
Pin No.
SOP/DIP/TSSOP
Pin Name
Function
1,3
2
4,5
6
7,14
8,13
9,12
10,11
15
C1+, C1-
V+
C2+, C2-
V-
T_OUT
R_IN
R_OUT
T_IN
GND
VCC
Terminals for positive charge pump capacitor
+2VCC voltage generated by the charge pump
Terminals for negative charge pump capacitor
-2VCC voltage generated by the charge pump
RS-232 Driver Outputs
RS-232 Receiver Inputs
RS-232 Receiver Outputs
RS-232 Driver Inputs
Ground
16
+4.5V to +5.5V Supply Voltage Input
Detailed Description
The UM232EExE consists of three sections: charge-pump voltage converters, drivers, and
receivers. These E versions provide extra protection against ESD. They survive ±15kV discharges
to the RS-232 inputs and outputs, tested using the Human Body Model. When tested according to
IEC61000-4-2, they survive ±8kV contact-discharges and ±15kV air-gap discharges. The rugged
E versions are intended for use in harsh environments or applications where the RS-232
connection is frequently changed. The UM232EExE devices have internal charge pump voltage
converters which allow them to operate from a single +5V supply. The charge pumps will operate
with polarized or non-polarized capacitors ranging from 0.1 to 10μF and will generate the ±9V
needed to generate the RS-232 output levels.
RS-232 Drivers
The drivers are inverting transmitters, which accept TTL or CMOS inputs and output RS-232
signals with an inverted sense relative to the input logic levels. Typically the RS-232 output
voltage swing is ±9V. Even under worst case loading conditions of 3kΩ and 2500pF, the output is
guaranteed to be ±5V, which is consistent with the RS-232 standard specifications. The
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UM232EExE
transmitter outputs are protected against infinite short-circuits to ground without degradation in
reliability. The instantaneous slew rate of the transmitter output is internally limited to a
maximum of 30V/μs in order to meet the RS-232 standard. The smooth transition of the loaded
output from VOL to VOH clearly meets the monotonicity requirements of the RS-232 standard.
RS-232 Receivers
The receivers convert RS-232 input signals to inverted TTL signals. The input thresholds are 0.8V
minimum and 2.4V maximum, again well within the 3V RS-232 requirements. The receiver
inputs are also protected against voltage up to 30V. A 5kΩ pull down resistor to ground will
commit the output of the receiver to a high state when the pin is float. In actual system
applications, it is quite possible for signals to be applied to the receiver inputs before power is
applied the receiver circuitry. This occurs, for example, when a PC user attempts to print, only to
realize the printer wasn’t turned on. In this case an RS-232 signal from the PC will appear on the
receiver input at the printer. When the printer power is turned on, the receiver will operate
normally. All of these enhanced devices are fully protected.
ESD Protection
UM232EExE devices have standard ESD protection structures incorporated on the pins to protect
against electrostatic discharges encountered during assembly and handling. In addition, the
RS-232 bus pins (driver outputs and receiver input) of these devices have an extra level of ESD
protection. Advanced ESD structures were designed to successfully protect these pins against
ESD discharge of ±15kV Human Body Model when powered down or up.
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UM232EExE
Test Circuits
+5V
+5V
+
+
0.1μF
0.1μF
VCC
VCC
V+
V-
V+
C1+
C1+
+
+
+
+
+
+
0.1μF
0.1μF
0.1μF
0.1μF
0.1μF
0.1μF
C1-
0.1μF
+
C1-
0.1μF
+
UM232E
UM232E
V-
C2+
C2+
VCC
VCC
C2-
C2-
400k
T_
400k
T_
T_OUT
T_OUT
T_IN
T_IN
Pulse
Generator
R_
R_
CL
R_IN
5k
R_IN
RL
R_OUT
R_OUT
Pulse
Generator
5k
CL
Receiver Test Circuit
Transmitter Test Circuit
Figure 1
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UM232EExE
Typical Operating Circuits
+5V
+
C5
16
VCC
2
6
1
V+
V-
C1+
+
+
+
+5V to +10V
VOLTAGE DOUBLE
C1
C2
C3
3
4
C1-
C4
+
C2+
+10V to -10V
VOLTAGE INVERTER
5
C2-
+5V
400k
T1OUT 14
11
T1IN
+5V
RS-232
OUTPUTS
TTL/CMOS
INPUTS
400k
T2OUT
R1IN
7
T2IN
10
12
R1OUT
13
TTL/CMOS
OUTPUTS
RS-232
INPUTS
5k
R2IN
R2OUT
8
9
5k
GND
15
Figure 2
Applications Information
Capacitor Selection
The capacitor type used for C1–C4 is not critical for proper operation. The UM232EExE, require
0.1μF capacitors, although in all cases capacitors up to 10μF can be used without harm. Ceramic
dielectrics are suggested for the 0.1μF capacitors. When using the minimum recommended
capacitor values, make sure the capacitance value does not degrade excessively as the operating
temperature varies. If in doubt, use capacitors with a larger (e.g., 2x) nominal value. The
capacitors’ effective series resistance (ESR), which usually rises at low temperatures, influences
the amount of ripple on V+ and V-. Use larger capacitors (up to 10μF) to reduce the output
impedance at V+ and V-. Bypass VCC to ground with at least 0.1μF capacitor. In applications
sensitive to power-supply noise generated by the charge pumps, decouple VCC to ground with a
capacitor the same size as (or larger than) the charge pump capacitors (C1–C4).
V+ and V- as Power Supplies
A small amount of power can be drawn from V+ and V-, although this will reduce both driver
output swing and noise margins. Increasing the value of the charge-pump capacitors (up to 10μF)
helps maintain performance when power is drawn from V+ or V-.
Driving Multiple Receivers
Each transmitter is designed to drive a single receiver. Transmitters can be paralleled to drive
multiple receivers.
High Data Rates
These transceivers maintain the RS-232 ±5.0V minimum driver output voltages at data rates of over
250 kbps.
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UM232EExE
Package Information
UM232EESE SOP16
Outline Drawing
DIMENSIONS
MILLIMETERS
INCHES
D
Symbol
Min
1.35
0.10
0.35
0.19
3.80
9.80
Max
1.75
0.25
0.49
0.25
4.00
Min Max
0.053 0.069
0.004 0.010
0.014 0.019
0.007 0.010
0.150 0.157
A
A1
b
C
E
D
e
H
L
L
10.00 0.386 0.394
1.27 0.050
e
b
5.80
0.40
6.20
1.27
0.228 0.244
0.016 0.050
Land Pattern
NOTES:
1. Compound dimension: 9.90×3.90.
2. Unit: mm.
3. General tolerance ±0.05mm unless
otherwise specified.
1.27
0.5
4. The layout is just for reference.
Tape and Reel Orientation
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UM232EExE
UM232EEPE DIP16
Outline Drawing
DIMENSIONS
MILLIMETERS
INCHES
Min Max
Symbol
Min
-
Max
5.08
-
4.45
2.03
0.56
1.65
0.30
D1
A
A1
A2
A3
b
b1
C
D
D1
E
E1
e
-
0.200
-
0.38
3.18
1.40
0.41
1.14
0.20
18.92
0.13
7.62
6.10
2.54
7.62
-
0.015
E
E1
0.125 0.175
0.055 0.080
0.016 0.022
0.045 0.065
0.008 0.012
eA
eB
C
D
19.43 0.745 0765
2.03
8.26
7.87
-
0.005 0.080
0.300 0.325
0.240 0.310
e
b1
b
0.100
0.300
-
-
-
eA
eB
L
-
10.16
3.81
0.400
2.92
0.115 0.150
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UM232EExE
UM232EEUE TSSOP16
Outline Drawing
DIMENSIONS
MILLIMETERS
INCHES
Symbol
Min
-
Max
1.20
0.15
1.05
0.54
5.06
6.60
4.50
0.28
Min Max
A
A1
A2
A3
D
-
0.047
0.05
0.90
0.34
4.86
6.20
4.30
0.20
0.002 0.006
0.035 0.041
0.013 0.021
0.191 0.199
0.244 0.260
0.169 0.177
0.008 0.011
0.026BSC
E
E1
b
e
0.65BSC
Land Pattern
NOTES:
1. Compound dimension: 4.96×4.4.
2. Unit: mm.
3. General tolerance ±0.05mm unless
otherwise specified.
0.3
0.65
4. The layout is just for reference.
Tape and Reel Orientation
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UM232EExE
GREEN COMPLIANCE
Union Semiconductor is committed to environmental excellence in all aspects of its
operations including meeting or exceeding regulatory requirements with respect to the use
of hazardous substances. Numerous successful programs have been implemented to
reduce the use of hazardous substances and/or emissions.
All Union components are compliant with the RoHS directive, which helps to support
customers in their compliance with environmental directives. For more green compliance
information, please visit:
http://www.union-ic.com/index.aspx?cat_code=RoHSDeclaration
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: Unit 606, No.570 Shengxia Road, Shanghai 201210
Tel: 021-51093966
Fax: 021-51026018
Website: www.union-ic.com
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