STMICROELECTRONICS ST75285CTR

ST75285
MULTIPLE RS-232 DRIVERS AND RECEIVERS
■
■
■
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 120 Kbps
TSSOP
DESCRIPTION
The ST75285 contains six drivers and ten
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 ST75285
provides a rugged low-cost solution for this
function at the expense of quiescent power and
external passive components relative to the
ST75C185.
The ST75285 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 ST75285 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
K-bits/s, use of EIA/ITA-423-B (ITU v.10) and EIA/
ITA-422-B
(ITU
v.11)
standards
are
recommended. It allows space saving in
applications where two ST75185 are needed.
ORDERING CODES
Type
Temperature
Range
Package
Comments
ST75285CTR
0 to 70 °C
TSSOP38 (Tape & Reel)
2500 parts per reel
December 2002
1/13
ST75285
PIN DESCRIPTION
PlN N°
NAME AND FUNCTION
1
VDD
Supply Voltage (+12V)
2
3
4
5
6
7
8
9
RIN1
RIN2
RIN3
TOUT1
TOUT2
RIN4
TOUT3
RIN5
VCC
First Receiver Input
Second Receiver Input
Third Receiver Input
First Driver Output
Second Driver Output
Fourth Receiver Input
Third Driver Output
Fifth Receiver Input
Supply Voltage (-12V)
Sixth Receiver Input
Fourth Driver Output
Seventh Receiver Input
Fifth Driver Output
Sixth Driver Output
Eighth Receiver Input
Nineth Receiver Input
Tenth Receiver Input
Supply Voltage (-12V)
10
11
12
13
14
15
16
17
18
2/13
SYMBOL
19
RIN6
TOUT4
RIN7
TOUT5
TOUT6
RIN8
RIN9
RIN10
VDD
20
VSS
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
ROUT10
ROUT9
ROUT8
TIN6
TIN5
ROUT7
TIN4
ROUT6
GND
ROUT5
TIN3
ROUT4
TIN2
TIN1
ROUT3
ROUT2
ROUT1
VSS
Supply Voltage (+5V)
Tenth Receiver Ouput
Nineth Receiver Ouput
Eighth Receiver Ouput
Sixth Driver Input
Fifth Driver Input
Seventh Receiver Ouput
Fourth Driver Input
Sixth Receiver Output
Ground
Fifth Receiver Output
Third Driver Input
Fourth Receiver Output
Second Driver Input
First Driver Input
Third Receiver Ouput
Second Receiver Ouput
First Receiver Ouput
Supply Voltage (+5V)
ST75285
PIN CONNECTION IEC LOGIC SYMBOL AND LOGIC DIAGRAM
ABSOLUTE MAXIMUM RATINGS OVER OPERATING FREE-AIR TEMPERATURE RANGE
Symbol
Parameter
Value
Unit
VDD
Supply Voltage (Note 1)
-0.3 to 15
V
VSS
Supply Voltage (Note 1)
0.3 to -15
V
VCC
Supply Voltage (Note 1)
-0.3 to 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
See dissipation Rating Table
TA
Operating Free-Air Tempereature Range
0 to 70
°C
Tstg
Storage Temperature Range
-65 to + 150
°C
ESD
Human Body Model
>2
kV
Lead Temperature 1.6mm from case for 10 sec
260
°C
TL
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is
not implied.
NOTE 1: All voltage are with respect to the network ground terminal.
DISSIPATION RATING TABLE
Package
Power Rating
at TA ≤ 25°C
Derating Factor
above TA = 25°C (*)
Power Rating
at TA ≤ 85°C
TSSOP (T)
1277 mW
10.2 mW/°C
644 mW
(*) This is the reverse of the traditional junction-case thermal resistance RtJ-C
3/13
ST75285
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
IOH
IOL
TA
Driver Input Voltage
High Level Output Current
DRIVER
RECEIVER
DRIVER
RECEIVER
Low Level Output Current
-6
-0.5
6
16
Operating Free-Air Tempereature
0
mA
mA
70
°C
SUPPLY CURRENTS
Test Conditions
Symbol
IDD
ISS
ICC
Parameter
Supply Current from VDD
Supply Current from VSS
Supply Current from VCC
VDD
VSS
Value
Unit
Min.
Typ.
9
-9
No load.
All inputs at
12
-12
1.9V
15
-15
9
-9
No load.
All
inputs at
12
-12
0.8V
15
-15
9
-9
No load.
All inputs at
12
-12
1.9V
15
-15
9
-9
No load.
All inputs at
12
-12
0.8V
15
-15
No load. All inputs at 5V
VCC = 5V
Max.
22
28
32
9
11
12
-22
-28
-32
-6.4
-6.4
-6.4
60
mA
mA
mA
mA
mA
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
VOL
IIH
Low Level Output Voltage
(Note 3)
High Level Input Current
IIL
Low Level Input Current
VI = 0 V (See Figure 2)
IOS(H)
High Level Short Circuit
Output Current (Note 4)
Low Level Short Circuit
Output Current
Output Resistance
VIL = 0.8 V
IOS(L)
RO
VIL = 0.8 V RL = 3KΩ (See Figure 1)
VIH = 1.9 V RL = 3KΩ (See Figure 1)
Unit
Min.
Typ.
6
7.5
-7.5
VI = 5 V (See Figure 2)
VIH = 2 V
VO = 0 V (See Figure 1)
VO = 0 V (See Figure 1)
VDD = VSS = VCC = 0 V
VO = -2 to 2 V (Note 5)
Max.
V
-6
V
10
µA
−1.6
mA
-4.5
−12
−19.5
mA
4.5
12
19.5
mA
300
Ω
NOTE 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).
NOTE 4: Output short circuit conditions must maintain the total power dissipation below absolute maximum ratings.
NOTE 5: Test conditions are those specified by EIA-232-E and as listed above.
4/13
ST75285
DRIVER SWITCHING CHARACTERISTICS (VDD = 12V, VSS = -12V, VCC = 5V, TA = 25 °C)
Value
Symbol
Parameter
Test Conditions
Unit
Min.
tPLH
tPHL
tTLH
tTHL
Propagation Delay Time, Low to High RL = 3 to 7 KΩ CL = 15 pF
Level Output
(See Figure 3, 4)
Propagation Delay Time, High to Low RL = 3 to 7 KΩ CL = 15 pF
Level Output
(See Figure 3, 4)
Transition Time Low to High Level
RL = 3 to 7 KΩ CL = 15 pF
Output
(See Figure 3, 4)
RL = 3 to 7 KΩ CL = 2500 pF
(Note 6, See Figure 3, 4)
Transition Time High to Low Level
RL = 3 to 7 KΩ CL = 15 pF
Output
(See Figure 3, 4)
RL = 3 to 7 KΩ CL = 2500 pF
(Note 6, See Figure 3, 4)
Typ.
Max.
200
400
ns
50
100
ns
60
100
ns
1.7
2.5
µs
50
100
ns
1.5
2.5
µs
NOTE 6: Measured between -3V and 3V points of output waveform (EIA-232-E conditions), all unused inputs are tied.
RECEIVER ELECTRICAL CHARACTERISTICS OVER OPERATING CONDITIONS
Value
Symbol
Parameter
Test Conditions
Unit
Min.
VT+
Positive Going Threshold Voltage
(See Figure 6)
TA = 25 °C (See Figure 6)
VT-
Negative Going Threshold Voltage
Vhys
Input Hysteresis (VT+ - VT-)
0.75
VOH
High Level Output Voltage
IOH = -0.5mA
VOL
Low Level Output Voltage
VI = 3 V
IIH
High Level Input Current
VI = 25 V (See Figure 6)
3.6
VI = 3 V
IIL
Low Level Input Current
IOS
Short-Circuit Output Current
Typ.
Max.
2.2
2.4
0.97
V
0.5
VIH = 0.75 V
2.6
Inputs Open
IOL = 10 mA
2.6
(See Figure 6)
0.43
VI = -25 V (See Figure 6)
-3.6
VI = -3 V
-0.43
(See Figure 6)
VI = 0 V VO = 0 V
(See Figure 5)
V
V
4
5
0.2
0.45
V
8.3
mA
-8.3
mA
-12
mA
-3.4
V
All typical values are at TA = 25°C, VCC = 5V, VDD = 9V and VSS=-9V
RECEIVER SWITCHING CHARACTERISTICS (VDD = 12V, VSS = -12V, VCC = 5V TA = 25°C)
Value
Symbol
Parameter
Test Conditions
Unit
Min.
tPLH
tPHL
tTLH
tTHL
Propagation Delay Time Low to High RL = 5 KΩ CL =
Level Output
(See Figure 6)
Propagation Delay Time High to Low RL = 5 KΩ CL =
Level Output
(See Figure 6)
Transition Time Low to High Level
RL = 5 KΩ CL =
Output
(See Figure 6)
Transition Time High to Low Level
RL = 5 KΩ CL =
Output
(See Figure 6)
Typ.
Max.
50 pF
200
500
ns
50 pF
60
120
ns
50 pF
200
525
ns
50 pF
20
60
ns
5/13
ST75285
Figure 1 : Driver Test Circuit for VOH, ISO(H) and ISO(L)
Figure 2 : Driver Test Circuit for IIH and IIL
Figure 3 : Driver Test Circuit
6/13
ST75285
Figure 4 : Driver Voltage Waveforms
Figure 5 : Receiver Test Circuit for IOS
Figure 6 : Receiver Test Circuit for VT, VOH, VOL
7/13
ST75285
Figure 7 : Receiver Test Circuit
Figure 8 : Receiver Voltage Waveforms
NOTE A: The pulse generator has the following characteristics: tW = 25µs, PRR = 20KHz, ZO = 50 Ω, tr = tf < 50ns
NOTE B: CL includes probe and jig capacitance.
8/13
ST75285
Figure 9 : Driver Voltage Transfer Characteristics
Figure 12 : Driver Output Current vs Output
Voltage
Figure 10 : Driver Short Circuit Output Current vs
Free-Air Temperature
Figure 13 : Driver Output Slew Rate vs Load
Capacitance
Figure 11 : Receiver Threshold vs Supply
Voltage
Figure 14 : Receiver Threshold vs Temperature
9/13
ST75285
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).
10/13
ST75285
TSSOP38 MECHANICAL DATA
mm.
inch
DIM.
MIN.
TYP
MAX.
A
MIN.
TYP.
1.2
A1
0.05
A2
0.8
b
MAX.
0.047
0.15
0.002
1.05
0.031
0.17
0.27
0.0067
0.011
c
0.09
0.20
0.0035
0.0079
D
9.6
9.7
9.8
0.378
0.381
0.385
E
6.2
6.4
6.6
0.244
0.252
0.260
E1
4.3
4.4
4.5
0.169
0.173
0.177
1
e
0.006
0.039
0.5
K
0˚
L
0.50
A
0.041
0.0197
0.6
8˚
0˚
0.75
0.020
8˚
0.023
0.030
A2
A1
b
K
e
L
E
c
D
E1
PIN 1 IDENTIFICATION
1
0117861/B
11/13
ST75285
Tape & Reel TSSOP38 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
12/13
TYP
0.504
22.4
0.519
0.882
Ao
6.8
7
0.268
0.276
Bo
10.1
10.3
0.398
0.406
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
ST75285
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from
its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications
mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information
previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or
systems without express written approval of STMicroelectronics.
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© 2002 STMicroelectronics - Printed in Italy - All Rights Reserved
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13/13