STMICROELECTRONICS ST75185

ST75185
Multiple RS-232 drivers and receivers
General features
■
Meets and exceeds the requirements of
EIA/TIA-232-E and ITUV.28 standard
■
Single chip with easy interface between UART
and serial port connector of IBM PC/ATTM and
compatibles
■
Designed to support data rates up to 120kbps
■
Pinout compatible with ST75C185
SO-20
TSSOP20
Description
The ST75185 contains three drivers and five
receivers. The pinout matches the DB9S
connector design in order to decrease the part
count, reduce the board space required and allow
easy interconnection of the UART and serial port
connector of IBM PC/ATTM and compatibles. The
bipolar circuits and processing of the ST75185
provides a rugged low-cost solution for this
function at the expense of quiescent power and
external passive components relative to the
ST75C185.
The ST75185 complies with the requirements of
the EIA/TIA 232-E and ITU (formally CCITT) v.28
standards. These standards are for data
interchange between a host computer and
peripheral at signalling rates up to 20k-bits/s. The
switching speeds of the ST75185 are fast enough
to support rates up to 120K-bits/s with lower
capacitive loads (shorter cables). Interoperability
at the higher signalling rates cannot be assured
unless the designer has design control of the
cable and the interface circuits at the both ends.
For interoperability at signalling rates to 120 Kbits/s, use of EIA/ITA-423-B (ITU v.10) and
EIA/ITA-422-B (ITU v.11) standards are
recommended.
The ST75185 is characterized for operation over
the range of 0°C to 70°C.
Order code
Part number
Temperature range
Package
Packaging
ST75185CTR
0 to 70 °C
TSSOP20 (Tape & Reel)
2500 parts per reel
ST75185CDR
0 to 70 °C
SO-20 (Tape & Reel)
1000 parts per reel
June 2006
Rev 16
1/21
www.st.com
21
Contents
ST75185
Contents
1
Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4
Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5
Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6
Application information: diodes on power supply . . . . . . . . . . . . . . . . 14
7
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
8
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2/21
ST75185
Pin configuration
1
Pin configuration
Figure 1.
Pin connection IEC logic symbol and logic diagram
Table 1.
Pin description
Pin N°
Symbol
Name and function
1
VDD
Supply voltage (+12V)
2
RA1
First receiver input
3
RA2
Second receiver input
4
RA3
Third Receiver Input
5
DY1
First driver output
6
DY2
Second driver output
7
RA4
Fourth receiver input
8
DY3
Third driver output
9
RA5
Fifth receiver input
10
VSS
Supply voltage (-12V)
11
GND
Ground
12
RY5
Fifth receiver output
13
DA3
Third driver input
14
RY4
Fourth receiver output
15
DA2
Second driver input
16
DA1
First driver input
17
RY3
Third receiver output
18
RY2
Second receiver output
19
RY1
First Receiver Output
20
VCC
Supply Voltage (+5V)
3/21
Maximum ratings
ST75185
2
Maximum ratings
Table 2.
Absolute maximum ratings over operating free-air temperature range
Symbol
Parameter
Value
Unit
VDD
Supply voltage (Note: 1)
15
V
VSS
Supply voltage (Note: 1)
-15
V
VCC
Supply voltage (Note: 1)
10
V
VI
Input voltage range (Driver)
-15 to 7
V
VI
Input voltage range (Receiver)
-30 to 30
V
VO
Output voltage range (Driver)
-15 to 15
V
IO
Receiver low level output current
20
mA
PD
Continuous total power dissipation
TA
Operating free-air temperature range
TSTG
Storage temperature range
TL
Lead temperature 1.6mm from case for 10 sec
Note:
Note:
See dissipation rating table
0 to 70
°C
-65 to + 150
°C
260
°C
Absolute Maximum Ratings are those values beyond which damage to the device may
occur. Functional operation under these condition is not implied.
1
Table 3.
All voltage are with respect to the network ground terminal.
Dissipation rating table
Package
Power rating
at TA ≤25°C
Derating factor (1)
above TA = 25°C
Power rating
at TA ≤70°C
MICROPACKAGE (D)
1125 mW
9.0 mW/°C
720 mW
1. This is the reverse of the traditional junction-case thermal resistance RtJ-C
Table 4.
Recommended operating conditions
Symbol
Parameter
Min
Max
Unit
VDD
Supply voltage
7.5
15
V
VSS
Supply voltage
-7.5
-15
V
VCC
Supply voltage
4.5
5.5
V
0
VCC
V
VI
Driver input voltage
IOH
High level output current
IOL
Low level output current
TA
Operating free-air temperature range
Driver
4/21
-6
mA
Receiver
-0.5
Driver
6
Receiver
16
mA
0
70
°C
ST75185
Electrical characteristics
3
Electrical characteristics
Table 5.
Supply currents
Test Conditions
Symbol
IDD
ISS
ICC
Value
Parameter
Supply current from VDD
Supply current from VSS
Supply current from VCC
Unit
VDD
VSS
9
-9
12
-12
15
-15
9
-9
12
-12
15
-15
9
-9
12
-12
15
-15
9
-9
12
-12
15
-15
Min.
No load.
all inputs at
1.9V
No load.
all inputs at
0.8V
No load.
all inputs at
1.9V
No load.
all inputs at
0.8V
No load. All inputs at 5V
VCC = 5V
Typ.
Max.
15
19
mA
25
4.5
5.5
mA
9
-15
-19
mA
-25
-3.2
-3.2
mA
-3.2
30
mA
5/21
Electrical characteristics
Table 6.
ST75185
Driver electrical characteristics over operating free-air temperature range
(VDD = 9V, VSS = -9V, VCC = 5V, unless otherwise specified)
Value
Symbol
Parameter
Test Conditions
VOH
High Level Output Voltage
VIL = 0.8 V, RL = 3KΩ
(See Figure 3.)
VOL
Low Level Output Voltage
(Note 3)
VIH = 1.9 V, RL = 3KΩ
(See Figure 3.)
IIH
High Level Input Current
IIL
Unit
Min.
Typ.
6
7.5
Max.
V
-6
V
VI = 5 V (See Figure 4.)
10
µA
Low Level Input Current
VI = 0 V (See Figure 4.)
−1.6
mA
IOS(H)
High Level Short Circuit
Output Current (Note 4)
VIL = 0.8 V, VO = 0 V
(See Figure 3.)
-4.5
−12
−19.5
mA
IOS(L)
Low Level Short Circuit
Output Current
VIH = 2 V VO = 0 V
(See Figure 3.)
4.5
12
19.5
mA
Output Resistance
VDD = VSS = VCC = 0 V
VO = -2 to 2 V (Note 5)
300
RO
Note:
-7.5
W
3
The algebraic convention, where the more positive (less negative) limits designated as
maximum, is used in this datasheet for logic levels only (e.g. if - 10V is a maximum, the
typical value is a more negative voltage).
4
Output short circuit conditions must maintain the total power dissipation below absolute
maximum ratings.
5
Test conditions are those specified by EIA-232-E and as listed above.
Table 7.
Driver switching characteristics
(VDD = 12V, VSS = -12V, VCC = 5V, TA = 25 °C)
Value
Symbol
Parameter
Test Conditions
Unit
Min.
Typ.
Max.
tPLH
Propagation Delay Time, Low to
High Level Output
RL = 3 to 7 KΩ CL = 15 pF
(See Figure 5, Figure 6)
315
500
ns
tPHL
Propagation Delay Time, High to
Low Level Output
RL = 3 to 7 KΩ CL = 15 pF
(See Figure 5, Figure 6)
75
175
ns
RL = 3 to 7 KΩ CL = 15 pF
(See Figure 5, Figure 6)
60
100
ns
RL = 3 to 7 KΩ CL = 2500 pF
(Note 6, Figure 5, Figure 6)
1.7
2.5
µs
RL = 3 to 7 KΩ CL = 15 pF
(See Figure 5, Figure 6)
40
7.5
ns
RL = 3 to 7 KΩ CL = 2500 pF
(Note 6, Figure 5, Figure 6)
1.5
2.5
µs
Transition Time Low to High Level
Output
tTLH
Transition Time High to Low Level
Output
tTHL
6
6/21
Measured between -3V and 3V points of output waveform (EIA-232-E conditions), all
unused inputs are tied.
ST75185
Table 8.
Electrical characteristics
Receiver electrical characteristics over operating conditions
Value
Symbol
Parameter
Test Conditions
Unit
Min.
VT+
Positive Going Threshold Voltage
(See Figure 9)
VT-
Negative Going Threshold Voltage
TA = 25 °C (See Figure 9)
Vhys
Input Hysteresis (VT+ - VT-)
VOH
High Level Output Voltage
VOL
Low Level Output Voltage
IIH
High Level Input Current
IIL
Low Level Input Current
IOS
Short-Circuit Output Current
0.75
Typ.
Max.
2.2
2.4
0.97
V
0.5
IOH = -0.5mA
VI = 3 V
VIH = 0.75 V
2.6
Inputs Open
2.6
IOL = 10 mA
4
0.2
3.6
(See Figure 9)
0.43
VI = -25 V (See Figure 9)
-3.6
(See Figure 9)
-0.43
VI = -3 V
V
5
V
VI = 25 V (See Figure 9)
VI = 3 V
V
0.45
V
8.3
mA
-8.3
mA
VI = 0 V VO = 0 V
(See Figure 7)
-3.4
Note:
All typical values are at TA = 25°C, VCC = 5V, VDD = 9V and VSS=-9V
Table 9.
Receiver switching characteristics
(VDD = 12V, VSS = -12V, VCC = 5V TA = 25°C)
-12
mA
Value
Symbol
Parameter
Test Conditions
Unit
Min.
Typ.
Max.
tPLH
Propagation Delay Time Low to
High Level Output
RL = 5 KΩ CL = 50 pF
(See Figure 9)
400
1000
ns
tPHL
Propagation Delay Time High to
Low Level Output
RL = 5 KΩ CL = 50 pF
(See Figure 9)
70
150
ns
tTLH
Transition Time Low to High Level
Output
RL = 5 KΩ CL = 50 pF
(See Figure 9)
200
525
ns
tTHL
Transition Time High to Low Level
Output
RL = 5 KΩ CL = 50 pF
(See Figure 9)
20
60
ns
7/21
Typical application
4
Typical application
Figure 2.
Application circuits
Figure 3.
Driver test circuit for VOH, ISO(H) and ISO(L)
8/21
ST75185
ST75185
Typical application
Figure 4.
Driver test circuit for IIH and IIL
Figure 5.
Driver test circuit
9/21
Typical application
Figure 6.
Driver voltage waveforms
Figure 7.
Receiver test circuit for IOS
Figure 8.
Receiver test circuit for VT, VOH, VOL
10/21
ST75185
ST75185
Figure 9.
Typical application
Receiver test circuit
Figure 10. Receiver voltage waveforms
Note:
1
The pulse generator has the following characteristics: tW = 25µs, PRR = 20KHz, ZO = 50 Ω,
tr = tf < 50ns
2
CL includes probe and jig capacitance.
11/21
Typical characteristics
5
ST75185
Typical characteristics
Figure 11. Driver voltage transfer
characteristics
Figure 12. Driver short circuit output current
vs. free-air temperature
Figure 13. Device supply current vs
temperature
Figure 14. Driver output current vs output
voltage
12/21
ST75185
Figure 15. Driver output slew rate vs load
capacitance
Typical characteristics
Figure 16. Receiver threshold vs temperature
Figure 17. Receiver threshold vs supply
voltage
13/21
Application information: diodes on power supply
6
ST75185
Application information: diodes on power supply
Diodes placed in series with the VDD and VSS leads protect the ST75185 in the fault
condition in which the devices output are shorted to ±15V and the power supplies are at low
state and provide low-impedance path to ground (see Figure below).
Figure 18. Diodes on power supply
14/21
ST75185
7
Package mechanical data
Package mechanical data
In order to meet environmental requirements, ST offers these devices in ECOPACK®
packages. These packages have a Lead-free second level interconnect. The category of
second level interconnect is marked on the package and on the inner box label, in
compliance with JEDEC Standard JESD97. The maximum ratings related to soldering
conditions are also marked on the inner box label. ECOPACK is an ST trademark.
ECOPACK specifications are available at: www.st.com
15/21
Package mechanical data
ST75185
SO-20 MECHANICAL DATA
DIM.
mm.
MIN.
TYP
inch
MAX.
MIN.
TYP.
MAX.
A
2.35
2.65
0.093
0.104
A1
0.1
0.30
0.004
0.012
B
0.33
0.51
0.013
0.020
C
0.23
0.32
0.009
0.013
D
12.60
13.00
0.496
0.512
E
7.4
7.6
0.291
0.299
e
1.27
0.050
H
10.00
10.65
0.394
0.419
h
0.25
0.75
0.010
0.030
L
0.4
1.27
0.016
0.050
k
0°
8°
0°
8°
ddd
0.100
0.004
0016022D
16/21
ST75185
Package mechanical data
TSSOP20 MECHANICAL DATA
mm.
inch
DIM.
MIN.
TYP
MAX.
A
MIN.
TYP.
MAX.
1.2
A1
0.05
A2
0.8
b
0.047
0.15
0.002
0.004
0.006
1.05
0.031
0.039
0.041
0.19
0.30
0.007
0.012
c
0.09
0.20
0.004
0.0079
D
6.4
6.5
6.6
0.252
0.256
0.260
E
6.2
6.4
6.6
0.244
0.252
0.260
E1
4.3
4.4
4.48
0.169
0.173
0.176
1
e
0.65 BSC
K
0˚
L
0.45
A
0.0256 BSC
0.60
8˚
0˚
0.75
0.018
8˚
0.024
0.030
A2
A1
b
K
e
L
E
c
D
E1
PIN 1 IDENTIFICATION
1
0087225C
17/21
Package mechanical data
ST75185
Tape & Reel SO-20 MECHANICAL DATA
mm.
inch
DIM.
MIN.
A
MAX.
MIN.
330
13.2
TYP.
MAX.
12.992
C
12.8
D
20.2
0.795
N
60
2.362
T
18/21
TYP
0.504
30.4
0.519
1.197
Ao
10.8
11
0.425
0.433
Bo
13.2
13.4
0.520
0.528
Ko
3.1
3.3
0.122
0.130
Po
3.9
4.1
0.153
0.161
P
11.9
12.1
0.468
0.476
ST75185
Package mechanical data
Tape & Reel TSSOP20 MECHANICAL DATA
mm.
inch
DIM.
MIN.
A
TYP
MAX.
MIN.
330
MAX.
12.992
C
12.8
D
20.2
0.795
N
60
2.362
T
13.2
TYP.
0.504
22.4
0.519
0.882
Ao
6.8
7
0.268
0.276
Bo
6.9
7.1
0.272
0.280
Ko
1.7
1.9
0.067
0.075
Po
3.9
4.1
0.153
0.161
P
11.9
12.1
0.468
0.476
19/21
Revision history
ST75185
8
Revision history
Table 10.
Revision history
Date
Revision
28-Apr-2006
15
Order codes has been updated and new template.
01-Jun-2006
16
Figure 2. updated.
20/21
Changes
ST75185
Please Read Carefully:
Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the
right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any
time, without notice.
All ST products are sold pursuant to ST’s terms and conditions of sale.
Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no
liability whatsoever relating to the choice, selection or use of the ST products and services described herein.
No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. If any part of this
document refers to any third party products or services it shall not be deemed a license grant by ST for the use of such third party products
or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoever of such
third party products or services or any intellectual property contained therein.
UNLESS OTHERWISE SET FORTH IN ST’S TERMS AND CONDITIONS OF SALE ST DISCLAIMS ANY EXPRESS OR IMPLIED
WARRANTY WITH RESPECT TO THE USE AND/OR SALE OF ST PRODUCTS INCLUDING WITHOUT LIMITATION IMPLIED
WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS
OF ANY JURISDICTION), OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT.
UNLESS EXPRESSLY APPROVED IN WRITING BY AN AUTHORIZE REPRESENTATIVE OF ST, ST PRODUCTS ARE NOT DESIGNED,
AUTHORIZED OR WARRANTED FOR USE IN MILITARY, AIR CRAFT, SPACE, LIFE SAVING, OR LIFE SUSTAINING APPLICATIONS,
NOR IN PRODUCTS OR SYSTEMS, WHERE FAILURE OR MALFUNCTION MAY RESULT IN PERSONAL INJURY, DEATH, OR
SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE.
Resale of ST products with provisions different from the statements and/or technical features set forth in this document shall immediately void
any warranty granted by ST for the ST product or service described herein and shall not create or extend in any manner whatsoever, any
liability of ST.
ST and the ST logo are trademarks or registered trademarks of ST in various countries.
Information in this document supersedes and replaces all information previously supplied.
The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners.
© 2006 STMicroelectronics - All rights reserved
STMicroelectronics group of companies
Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America
www.st.com
21/21