ST75C185
LOW POWER
MULTIPLE RS-232 DRIVERS AND RECEIVERS
s
s
s
s
s
s
s
s
s
s
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 INTPUT 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
DIP
DESCRIPTION
The ST75C185 is ow 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 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 technology.
ORDERING CODES
O
so
b
te
le
r
P
uc
od
s)
t(
bs
-O
et
l
o
P
e
od
r
s)
t(
uc
SOP
TSSOP
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 usually 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.
Type
Temperature
Range
0 to 70 °C
0 to 70 °C
0 to 70 °C
0 to 70 °C
-40 to 85 °C
-40 to 85 °C
-40 to 85 °C
-40 to 85 °C
Package
DIP20
SO-20 (Tube)
SO-20 (Tape & Reel)
TSSOP20 (Tape & Reel)
DIP20
SO-20 (Tube)
SO-20 (Tape & Reel)
TSSOP-20 (Tape & Reel)
Comments
20 parts per tube / 50 tubes per box
40 parts per tube / 25 tubes per box
1000 parts per reel
2500 parts per reel
20 parts per tube / 50 tubes per box
40 parts per tube / 25 tubes per box
1000 parts per reel
2500 parts per reel
ST75C185CN
ST75C185CD
ST75C185CDR
ST75C185CTR
ST75C185BN
ST75C185BD
ST75C185BDR
ST75C185BTR
December 2002
1/16
ST75C185
PIN CONNECTION IEC LOGIC SYMBOL AND LOGIC DIAGRAM
PIN DESCRIPTION
PlN N°
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
SYMBOL
V
DD
RA1
RA2
RA3
DY1
DY2
RA4
DY3
RA5
V
SS
NAME AND FUNCTION
Supply Voltage (+12V)
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)
O
so
b
te
le
r
P
uc
od
GND
RY5
DA3
RY4
DA2
DA1
RY3
RY2
RY1
V
CC
s)
t(
bs
-O
et
l
o
P
e
od
r
s)
t(
uc
Ground
Fifth Receiver Ouput
Third Driver Intput
Fourth Receiver Ouput
Second Driver Input
First Driver Input
Third Receiver Ouput
Second Receiver Output
First Receiver Output
Supply Voltage (+5V)
2/16
ST75C185
ABSOLUTE MAXIMUM RATINGS OVER OPERATING FREE-AIR TEMPERATURE RANGE
Symbol
V
DD
V
SS
V
CC
V
I
V
I
V
O
V
O
I
O
T
A
T
stg
T
L
Supply Voltage (Note 1)
Supply Voltage (Note 1)
Supply Voltage (Note 1)
Input Voltage Range (DRIVER)
Input Voltage Range (RECEIVER)
Output Voltage Range (DRIVER)
Output Voltage Range (RECEIVER)
Receiver Low Level Output Current
Operating Free-Air Tempereature Range
Storage Temperature Range
Lead Temperature 1.6mm from case for 10 sec
Parameter
Value
15
-15
7
-0.3 to (V
CC
+ 0.3)
-30 to 30
(V
SS
- 6) to (V
DD
+ 6)
-0.3 to (V
CC
+ 0.3)
20
-40 to 85
-65 to + 150
260
Unit
V
V
V
V
V
V
V
mA
°C
°C
°C
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 voltages are with respect to the network ground terminal.
RECOMMENDED OPERATING CONDITIONS
Symbol
V
DD
V
SS
V
CC
V
I
I
OH
I
OL
T
A
Supply Voltage
Supply Voltage
Supply Voltage
Input Voltage (Note 2)
High Level Output Current
Low Level Output Current
Operating Free-Air Tempereature Range
Parameter
Min
7
NOTE 2: The algebraic conversion, where the more positive (less negative) limits 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.
SUPPLY CURRENTS
Symbol
I
DD
I
SS
I
CC
Parameter
b
O
so
te
le
Supply Current from V
DD
Supply Current from V
SS
Supply Current from V
CC
r
P
uc
od
s)
t(
so
b
-O
RECEIVER
RECEIVER
RECEIVER
DRIVER
te
le
4.5
0
-25
-40
-7
r
P
5
TYP
12
od
s)
t(
uc
Max
13.2
-13.2
5.5
V
CC
25
-1
3.2
Unit
V
V
V
V
mA
mA
°C
-12
25
85
Value
Test Conditions
Min.
No load. All inputs at 2 or 0.8V
No load. All inputs at 2 or 0.8V
No load. All inputs at 2 or 5V
Typ.
115
-115
950
Max.
500
-500
1500
µA
µA
µA
Unit
3/16
ST75C185
DRIVER ELECTRICAL CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE
(V
DD
= 12V, V
SS
= -12V, V
CC
= 5V ± 10%, unless otherwise specified)
Value
Symbol
V
OH
Parameter
High Level Output Voltage
Test Conditions
Min.
V
IL
= 0.8 V
R
L
= 3KΩ
(See Figure 1)
V
IH
= 1.9 V
R
L
= 3KΩ
(See Figure 1)
V
DD
= 7V, V
SS
= -7V
V
DD
= 12V, V
SS
= -12V
V
DD
= 7V, V
SS
= -7V
V
DD
= 12V, V
SS
= -12V
2
V
I
= 5 V (See Figure 2)
V
I
= 0 V (See Figure 2)
V
I
= 0.8 V V
O
= 0 V or V
SS
(See Figure1)
V
I
= 2 V
V
O
= 0 V or V
SS
(See Figure 1)
V
O
= -2 to 2 V V
SS
= V
CC
= V
DD
= 0 V
-6
6
300
−20
35
450
5
10
Typ.
6.3
10.8
-6.3
-10.8
1.4
1.4
0.8
1
−1
−60
60
-5
-10
Max.
V
V
V
V
V
V
µA
µA
mA
mA
Ω
Unit
V
OL
Low Level Output Voltage
(Note 3)
High Level Input Voltage
Low Level Input Voltage
High Level Input Current
Low Level Input Current
High Level Short Circuit
Output Current (Note 4)
Low Level Short Circuit
Output Current (Note 4)
Output Resistance
V
IH
V
IL
I
IH
I
IL
I
OS(H)
I
OS(L)
R
O
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: Not more than one outputs should be shorted at one time.
DRIVER SWITCHING CHARACTERISTICS
(V
DD
= 12V, V
SS
= -12V, V
CC
= 5V, T
A
= 25 °C)
Symbol
t
PLH
t
PHL
t
TLH
t
THL
SR
Parameter
Propagation Delay Time, Low to High R
L
= 3 to 7 KΩ C
L
= 1000 pF
Level Output
(See Figure 3)
Propagation Delay Time, High to Low R
L
= 3 to 7 KΩ C
L
= 1000 pF
Level Output
(See Figure 3)
Transition Time Low to High Level
R
L
= 3 to 7 KΩ C
L
= 1000 pF
Output
(See Figure 3)
Transition Time High to Low Level
R
L
= 3 to 7 KΩ C
L
= 1000 pF
Output
(See Figure 3, 4)
Output Slew Rate (Note 5)
R
L
= 3 to 7 KΩ
C
L
= 50 to 2500 pF
(See Figure 3)
NOTE 5: Measured between -3V and 3V points of output waveform (EIA-232-E conditions), all unused inputs tied either high or low.
O
so
b
te
le
r
P
uc
od
s)
t(
bs
-O
Test Conditions
et
l
o
P
e
Min.
od
r
Typ.
1.9
1.6
s)
t(
uc
Max.
4
4
3.2
3.2
30
Value
Unit
µs
µs
µs
µs
V/µs
0.53
0.53
4
2
2
11
4/16
ST75C185
RECEIVER ELECTRICAL CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE
(V
DD
= 12V, V
SS
= -12V, V
CC
= 5V ± 10%, unless otherwise specified)
Value
Symbol
V
T+
V
T-
V
hys
V
OH
V
OL
I
IH
I
IL
I
OS(H)
I
OS(L)
Parameter
Positive Going Threshold Voltage
Negative Going Threshold Voltage
Input Hysteresis (V
T
+ - V
T
-) (Note 6)
High Level Output Voltage (Note 7)
Low Level Output Voltage
High Level Input Current
Low Level Input Current
Short-Circuit Output Current at High
Level
Short-Circuit Output Current at Low
Level
I
OH
= 0.75 mA or Input Open
I
OH
= -1 mA (See Figure 6)
V
I
= 3 V I
OL
= 3.2 mA
(See Figure 6)
V
I
= 25 V (See Figure 6)
V
I
= 3 V
V
I
= -3 V
(See Figure 6)
(See Figure 6)
V
I
= -25 V (See Figure 6)
V
I
= 0.75 V V
O
= 0 V
(See Figure 5)
V
I
= V
CC
V
O
= V
CC
(See Figure 5)
Test Conditions
Min.
(See Figure 6)
(See Figure 6)
1.6
0.65
0.6
3.5
Typ.
2.1
1
1.1
4.8
0.2
3.6
0.43
-3.6
-0.4
4.5
0.55
-4.4
-0.55
-13
35
0.4
8.3
1
-8.3
-1
-30
60
mA
mA
mA
Max.
2.55
1.25
V
V
V
V
V
mA
Unit
All typical values are at TA = 25°C
NOTE 6: Hysteresis is the difference between the positive going input threshold voltage, V
T+
, and the negative going input threshold voltage
V
T-
NOTE 7: If the inputs are left unconnected, the receiver interprets this as an input low, and the receiver outputs will remain in the high state.
RECEIVER SWITCHING CHARACTERISTICS
(V
DD
= 12V, V
SS
= -12V, V
CC
= 5V ± 10% T
A
= 25°C)
Symbol
t
PLH
t
PHL
t
TLH
t
THL
t
W(N)
Parameter
Propagation Delay Time Low to High R
L
= 5 KΩ C
L
=
Level Output
(See Figure 6)
Propagation Delay Time High to Low R
L
= 5 KΩ C
L
=
Level Output
(See Figure 6)
Transition Time Low to High Level
R
L
= 5 KΩ C
L
=
Output
(See Figure 6)
Transition Time High to Low Level
R
L
= 5 KΩ C
L
=
Output
(See Figure 6)
Pulse Duration of longest pulse
R
L
= 5 KΩ C
L
=
rejection as noise (Note 8)
(See Figure 6)
NOTE 8: The receiver ignores any positive or negative going pulse that is less than the minimum value of t
W(N)
and accepts any positive or negative going
pulse greater than the maximum of t
W(N)
.
O
so
b
te
le
r
P
uc
od
s)
t(
bs
-O
et
l
o
P
e
Min.
od
r
Typ.
3.2
2.6
30
10
s)
t(
uc
Value
Unit
Max.
4
4
100
50
4
µs
µs
ns
ns
µs
Test Conditions
50 pF
50 pF
50 pF
50 pF
50 pF
1
2.3
5/16
MicroPython开源版块
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
