STMICROELECTRONICS ST75C185BDR

ST75C185

LOW POWER
MULTIPLE RS-232 DRIVERS AND RECEIVERS
TARGET DATA
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MEETS STANDARD EIA-232-E
SINGLE CHIP WITH INTERFACE BETWEEN
UART AND SERIAL PORT CONNECTOR
LESS THAN 20mW QUIESCENT POWER
CONSUMPTION
WIDE DRIVER SUPPLY VOLTAGE: 7 TO 13.2V
DRIVER OUTPUT SLEW RATE LIMITED TO
30V/µs MAX
RECEIVER INPUT HYSTERESIS: 1.1 TYP
PUSH-PULL RECEIVER OUTPUTS
ON CHIP RECEIVER 1µs NOISE FILTER
FUNCTIONALLY INTERCHANGEABLE WITH
STM ST75185
ESD PROTECTION: ±10KV HUMAN BODY
MODEL
DESCRIPTION
The ST75C185 is low power BICMOS device
containing three independent drivers and five
receivers that is used to interface data terminal
equipment (DTE) with data circuit-terminating
equipment (DCE). This device has been
designed
to
conform
to
Standards
ANSI/EIA-232-E. The drivers have a controlled
output slew rate that is limited to a maximum of
30V/µs and the receivers have filters that reject
input noise pulses that are shorter than 1µs. Both
(Micro Package)
(Plastic Package)
(TSSOP Package)
these features eliminate the need of external
components.
The ST75C185 hasn’t a power sequence fault
condition. It has been designed using low-power
techniques in a BICMOS tecnology.
In most application the receivers contained in this
device will interface to single inputs peripheral
devices
such
as
ACEs,
UARTs
or
microprocessors. By using sampling, such
peripheral devices are usuallly insensitive to the
transition times of the input signals. If this is not
the case, or for other uses, it is recommended
that the ST75C185 receiver outputs be buffered
by single gates of the HCMOS, ALS or 74F logic
families.
PIN CONNECTION IEC LOGIC SYMBOL AND LOGIC DIAGRAM
June 2000
1/13
ST75C185
ORDER CODES
T ype
T emperature Ran ge
Package
Comments
ST75C185CN
0 to 70 oC
DIP-20
20 parts per tube / 50 tubes per box
ST75C185CD
0 to 70 oC
SO-20 (Tube)
40 parts per tube / 25 tubes per box
ST75C185CDR
0 to 70 C
SO-20 (Tape & Reel)
1000 parts per reel
ST75C185CTR
0 to 70 oC
TSSOP20 (Tape & Reel)
2500 parts per reel
ST75C185BN
-40 to 85 oC
DIP-20
20 parts per tube / 50 tubes per box
ST75C185BD
-40 to 85 oC
SO-20 (Tube)
40 parts per tube / 25 tubes per box
ST75C185BDR
-40 to 85 oC
SO-20 (Tape & Reel)
1000 parts per reel
ST75C185BTR
-40 to 85 oC
TSSOP20 (Tape & Reel)
2500 parts per reel
o
PIN DESCRIPTION
2/13
PIN No
SYMBOL
1
VDD
Supply Voltage (+12V)
NAME AND F UNCTIO N
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
FourthReceiver 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)
ST75C185
ABSOLUTE MAXIMUM RATINGS OVER OPERATING FREE-AIR TEMPERATURE RANGE
(unless otherwise specified)
Symbol
Value
Un it
VDD
Supply Voltage (Note 1)
Parameter
15
V
VSS
Supply Voltage (Note 1)
-15
V
VCC
Supply Voltage (Note 1)
7
V
VI
Input Voltage Range (DRIVER)
-0.3 to (VCC+0.3)
V
VI
Input Voltage Range (RECEIVER)
-30 to 30
V
VO
Output Voltage Range (DRIVER)
(VSS-6) to (VDD+6)
V
VO
Output Voltage Range (RECEIVER)
-0.3 to (VCC+0.3)
V
20
mA
IO
Receiver Low Level Output Current
TA
Operating Free-Air Temperature Range
Tstg
Storage Temperature Range
TL
Lead Temperature 1.6mm from case for 10 sec
-40 to 85
o
C
-65 to +150
o
C
260
o
C
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied.
NOTE1:All voltages are withrespect tothe network ground terminal.
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
Min
TYP
Max
Unit
VDD
Supply Voltage
7
12
13.2
V
VSS
Supply Voltage
-7
-12
-13.2
V
VCC
Supply Voltage
4.5
5
V IN
Input Voltage (Note 2)
IOH
High Level Output Current
RECEIVER
IOL
Low Level Output Current
RECEIVER
TA
Operating Free-Air Temperature
DRIVER
RECEIVER
5.5
V
0
VCC
V
-25
25
-40
25
-1
mA
3.2
mA
85
o
C
NOTE 2: The algebraic convertion, where the more positive (less negative) limitis designed 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.
3/13
ST75C185
SUPPLY CURRENTS (VDD = 12V, VSS = -12V, VCC = 5V, unless otherwise specified)
Symb ol
Parameter
T est Cond it ion s
Value
Min .
T yp.
Un it
Max.
IDD
Supply Current from VDD
No load. All inputs at 2 or 0.8V
115
500
µA
ISS
Supply Current from VSS
No load. All inputs at 2 or 0.8V
-115
-500
µA
ICC
Supply Current from VCC
No load. All inputs at 0 or 5V
950
1500
µA
DRIVER ELECTRICAL CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE
(VDD = 12V, VSS = -12V, VCC = 5V±10%, unless otherwise specified)
Symb ol
VOH
Parameter
High Level Output Voltage
VOL
Low Level Output Voltage
(Note 3)
VIH
High Level Input Voltage
VIL
Low Level Input Voltage
IIH
High Level Input Current
T est Cond it ion s
VIL = 0.8V
R L = 3KΩ
(See Figure 1)
VIH = 1.9 V
R L = 3KΩ
(See Figure 1)
Value
Un it
Min .
T yp.
VDD = 7V, VSS = -7V
5
6.3
V
VDD = 12V, V SS = -12V
10
10.8
V
VDD = 7V, VSS = -7V
VDD = 12V, V SS = -12V
2
Max.
-6.3
-5
V
-10.8
-10
V
1.4
1.4
VI = 5 V (See Figure 2)
V
0.8
V
1
µA
IIL
Low Level Input Current
VI = 0 V (See Figure 2)
-1
µA
IOS(H)
High Level Short Circuit
Output Current (Note 4)
VI = 0.8 V V O = 0V or VSS
(See Figure 1)
-6
-20
-60
mA
IOS(L)
Low Level Short Circuit
Output Current (Note 4)
VI = 2 V V O = 0V or VSS
(See Figure 1)
6
35
60
mA
Output Resistance
VO = -2 to 2 V VSS = VCC = VDD = 0V
300
450
RO
Ω
NOTE 3: The algebraic convention, where the more positive (less negative) limitis 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: Notmore than one outputs should be shorted atone time.
DRIVER SWITCHING CHARACTERISTICS
(VDD = 12V, VSS = -12V, VCC = 5V TA = 25 oC)
Symb ol
Parameter
T est Cond it ion s
Value
Min .
Un it
T yp.
Max.
tPLH
Propagation Delay Time, Low R L = 3 to 7 KΩ C L = 1000 pF
to High Level Output
(See Figures 3)
1.9
4
µs
tPHL
Propagation Delay Time High
to Low Level Output
R L = 3 to 7 KΩ C L = 1000 pF
(See Figures 3)
1.6
4
µs
tTLH
Transition Time Low to High
Level Output
R L = 3 to 7 KΩ C L = 1000 pF
(See Figures 3)
0.53
2
3.2
µs
tTHL
Transition Time High to Low
Level Output
R L = 3 to 7 KΩ
(See Figure 3)
0.53
2
3.2
µs
SR
Output Slew Rate (Note 5)
R L = 3 to 7 KΩ
C L = 50 to 2500 pF
(See Figure 3)
4
11
30
V/µs
C L = 1000 pF
NOTE 5: Measured between -3V and 3V points of output waveform (EIA-232-E conditions), all unused inputs tied either high or low.
4/13
ST75C185
RECEIVER ELECTRICAL CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE
(VDD = 12V, VSS = -12V, VCC = 5V±10%, unless otherwise specified)
Symb ol
Parameter
T est Cond it ion s
Value
Un it
Min .
T yp.
Max.
VT+
Positive Going Threshold
Voltage
(See Figure 6)
1.6
2.1
2.55
VT-
Negative Going Threshold
Voltage
(See Figure 6)
0.65
1
1.25
Vhys
Input Hysteresis (VT+ - VT-)
(Note 6)
0.6
1.1
VOH
High Level Output Voltage
(Note 7)
IOH = 0.75mA or Input Open
IOH = -1mA (See Figure 6)
3.5
4.8
VOL
Low Level Output Voltage
VI = 3 V IOL = 3.2 mA
(See Figure 6)
High Level Input Current
VI = 25 V
(See Figure 6)
VI = 3 V
(See Figure 6)
IIH
IIL
Low Level Input Current
V
V
V
V
0.2
0.4
V
3.6
4.5
8.3
mA
0.43
0.55
1
VI = -25 V
(See Figure 6)
-3.6
-4.4
-8.3
VI = -3 V
(See Figure 6)
-0.4
-0.55
-1
mA
IOS(H)
Short-Circuit Output Current
at High Level
VI = 0.75 V VO = 0 V
(See Figure 5)
-13
-30
mA
IOS(L)
Short-Circuit Output Current
at Low Level
VI = VCC
VO = VCC
(See Figure 5)
35
60
mA
Alltypical values are at TA = 25 oC,
NOTE 6: Hysteresis is thedifference between the positive going input threshold voltage, V T+, and the negative going input threshold voltage VT-.
NOTE 7: Ifthe inputs are letf unconnected, the receiver interprets this as an input low, and the receiver outputs will remain in the high state.
RECEIVER SWITCHING CHARACTERISTICS
(VDD = 12V, VSS = -12V, VCC = 5V±10% TA = 25 oC)
Symbo l
Parameter
T est Co nditio ns
Value
Min.
Unit
Typ .
Max.
tPLH
Propagation Delay Time, Low R L = 5 KΩ CL = 50 pF
to High Level Output
(See Figure 6)
3.2
4
µs
tPHL
Propagation Delay Time High
to Low Level Output
R L = 5 KΩ CL = 50 pF
(See Figure 6)
2.6
4
µs
tTLH
Transition Time Low to High
Level Output
R L = 5 KΩ CL = 50 pF
(See Figure 6)
30
100
ns
tTHL
Transition Time High to Low
Level Output
R L = 5 KΩ CL = 50 pF
(See Figure 6)
10
50
ns
tW(N)
Pulse Duration of longest
pulse rejection as noise
(Note8)
R L = 5 KΩ CL = 50 pF
(See Figure 6)
2.3
4
µs
1
NOTE 8: The receiver ignores any positive or negative going pulse that is less than the minimumvalue oft W(N) and accepts anypositive or negative going
pulse greater than the maximum of tW(N).
5/13
ST75C185
APPLICATION CIRCUITS
TTL LEVEL
Vdd
+12 V
RS232 LEVEL
Vcc
+5 V
ST75C185
20
DCD 38
19
DSR 37
18
RXD 21
17
UART RTS
(16550) TXD
32
11
CTS 36
DTR 33
RI
39
PC Serial Port
100nF
100nF
Vcc
Rout1
Rout2
Vdd
Rin1
1
2
DCD
Rin2
6
3
Rout3
Rin3
Din1
Dout1
Din2
Dout2
Rout4
Rin4
Din3
Dout3
Rout5
Rin5
GND
Vss
DSR
4
2
RXD
7
5
16
15
14
13
CL
RTS
6
7
CL
9
CTS
DTR
RI
10
100nF
Vss
-12V
3
TXD
CL
8
12
11
1
8
4
9
5
GND
DB9S EIA232-E
Serial Port
Connector
To CPU BUS
FIGURE 1: Driver Test Circuit for VOH, VOL,
ISO(H) and ISO(L)
6/13
FIGURE 2: Driver Test Circuit for IIH and IIL
ST75C185
FIGURE 3:Driver Test Circuit
FIGURE 4: Driver Voltage Waveforms
FIGURE 5: Receiver Test Circuit for IOS
FIGURE 6: Receiver Test Circuit for VT, VOH, VOL
FIGURE 7: Receiver Test Circuit
FIGURE 8: Receiver Voltage Waveforms
NOTE A: The pulse generator has the following characteristics: tW = 25 µs,PRR = 20 KHz, ZO = 50 Ω, tr = tf < 50ns.
NOTE B: CL includes probe and jig capacitance.
7/13
ST75C185
Driver Voltage Transfer Characteristics
Driver Output Current vs Output Voltage
Driver Short Circuit Output Current vs Free-Air
Temperature
Device Supply Current vs Temperature
Receiver Threshold vs Temperature
Receiver Threshold vs Supply Voltage
8/13
ST75C185
APPLICATION INFORMATION: DIODES ON POWER SUPPLY
Diodes placed in series with the VDD and VSS leads protect the ST75C185 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). Any idle transmitter input must be connected to GND
or VCC. This device is not sensitive to power supply sequence.
+Vdd
Output
ST75C185
Output
ST75C185
Output shorted
to ±15V
-Vss
9/13
ST75C185
Plastic DIP-20 (0.25) MECHANICAL DATA
mm
DIM.
MIN.
a1
0.254
B
1.39
TYP.
inch
MAX.
MIN.
TYP.
MAX.
0.010
1.65
0.055
0.065
b
0.45
0.018
b1
0.25
0.010
D
25.4
1.000
E
8.5
0.335
e
2.54
0.100
e3
22.86
0.900
F
7.1
0.280
I
3.93
0.155
L
Z
3.3
0.130
1.34
0.053
P001J
10/13
ST75C185
SO-20 MECHANICAL DATA
mm
DIM.
MIN.
TYP.
A
a1
inch
MAX.
MIN.
TYP.
2.65
0.10
0.104
0.20
a2
MAX.
0.004
0.007
2.45
0.096
b
0.35
0.49
0.013
0.019
b1
0.23
0.32
0.009
0.012
C
0.50
0.020
c1
45 (typ.)
D
12.60
13.00
0.496
0.512
E
10.00
10.65
0.393
0.419
e
1.27
0.050
e3
11.43
0.450
F
7.40
7.60
0.291
0.299
L
0.50
1.27
0.19
0.050
M
S
0.75
0.029
8 (max.)
P013L
11/13
ST75C185
TSSOP20 MECHANICAL DATA
mm
DIM.
MIN.
inch
TYP.
MAX.
A
MIN.
TYP.
1.1
0.433
A1
0.05
0.10
0.15
0.002
0.004
0.006
A2
0.85
0.9
0.95
0.335
0.354
0.374
b
0.19
0.30
0.0075
0.0118
c
0.09
0.2
0.0035
0.0079
D
6.4
6.5
6.6
0.252
0.256
0.260
E
6.25
6.4
6.5
0.246
0.252
0.256
E1
4.3
4.4
4.48
0.169
0.173
0.176
e
0.65 BSC
0.0256 BSC
K
0o
4o
8o
0o
4o
8o
L
0.50
0.60
0.70
0.020
0.024
0.028
A
A2
A1
b
K
e
E1
PIN 1 IDENTIFICATION
1
L
E
c
D
12/13
MAX.
ST75C185
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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. Specification 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 withoutexpress written approval of STMicroelectronics.
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13/13