UTC 75323
DESCRIPTION
LINEAR INTEGRATED CIRCUIT
MULTIPLE RS-232 DRIVERS AND
RECEIVERS
The UTC 75323 combines five drivers and three
receivers. The flow-through design of the UTC 75323
decreases the part count, reduces the board space
required, and allows easy interconnection of the UART
and serial-port connector. The all-bipolar circuits and
processing of the UTC 75323 provide a rugged,
low-cost solution for this function.
The UTC 75323 complies with the requirements of
the ANSI TIA/EIA-232-Fand ITU (formerly CCITT)
V.28 standards. These standards are for data
interchange
between
a
host
computer
and
a
peripheral at signal rates up to 20 Kbit/s. The
switching speeds of the UTC 75323 are fast enough to
support rates up to 120 kbit/s with lower capacitive
loads (shorter cables). Interoperability at the higher
signaling rates cannot be assured unless the designer
has design control of the cable and the interface
circuits at both ends. For interoperability at signaling
rates up to 120 kbit/s, use of ANSI Standard
TIA/EIA-423-B
and
TIA/EIA-422-B
and
ITU
Recommendations V.10 and V.11 are recommended.
The UTC 75323 is characterized for operation over a
temperature range of 0℃ to 70℃.
SOP-20
DIP-20
FEATURES
*Single Chip With Easy Interface Between UART and
Serial-Port Connector of an External Modem or Other
Computer Peripheral
*Five Drivers and Three Receivers Meet or Exceed the
Requirements of ANSI Standard TIA/EIA-232-F and
ITU Recommendation V.28 Standards.
*Supports Data Rates up to 120 kbit/s.
*Complement to the UTC 75232.
UTC
UNISONIC TECHNOLOGIES CO., LTD.
1
QW-R113-007,A
UTC 75323
PIN CONFIGURATION
LINEAR INTEGRATED CIRCUIT
Vcc
1DA
2DA
3DA
1RY
2RY
4DA
3RY
5DA
GND
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
V
DD
1DY
2DY
3DY
1RA
2RA
4DY
3RA
5DY
Vss
LOGIC SYMBOL *
1DA
2DA
3DA
1RY
2RY
4DA
3RY
5DA
2
3
4
5
6
7
8
9
19
18
17
16
15
14
13
12
1DY
2DY
3DY
1RA
2RA
4DY
3RA
5DY
LOGIC DIAGRAM ( POSITIVE LOGIC )
1DA
2DA
3DA
1RY
2RY
4DA
3RY
5DA
2
3
4
5
6
7
8
9
19
18
17
16
15
14
13
12
1DY
2DY
3DY
1RA
2RA
4DY
3RA
5DY
* This symbol is in accordance with ANSI/IEEE Std
91-1984 and IEC Publication 617-12.
UTC
UNISONIC TECHNOLOGIES CO., LTD.
2
QW-R113-007,A
UTC 75323
LINEAR INTEGRATED CIRCUIT
To Other Drivers
SCHEMATIC (EACH DRIVER)
V
DD
11.6kΩ
Input DAx
75.8Ω
4.2kΩ
GND
To Other
Drivers
Vss
To Other Drivers
Resistor values shown are nominal.
10.4kΩ
3.3kΩ
68.5Ω
320Ω
9.4kΩ
DYx Output
SCHEMATIC (EACH RECEIVER)
To Other Receivers
Vcc
9kΩ
2kΩ
1.66kΩ
5kΩ
RYx Output
Input RAx
3.8kΩ
10kΩ
GND
To Other Receivers
Resistor values shown are nominal.
UTC
UNISONIC TECHNOLOGIES CO., LTD.
3
QW-R113-007,A
UTC 75323
PARAMETER
Supply voltage (see Note 1)
Supply voltage (see Note 1)
Supply voltage (see Note 1)
Input voltage range: Driver
Receiver
Output voltage range, (Driver)
LINEAR INTEGRATED CIRCUIT
SYMBOL
Vcc
V
DD
Vss
V
I
Vo
ABSOLUTE MAXIMUM RATINGS
(Ta=25℃)
RATINGS
10
15
-15
-15 ~ 7
-30 ~ 30
-15 ~ 15
20
97
67
260
-65 ~ 150
UNIT
V
V
V
V
V
mA
°C/W
°C
°C
Low-level output current (Receiver)
I
OL
Package thermal impedance
θ
JA
SOP-20
DIP-20
Lead temperature 1.6mm(1/6 inch) from case
T
lead
for 10 seconds
Storage temperature range
Tstg
note: 1. All voltages are with respect to the network ground terminal.
RECOMMENDED OPERATING CONDITIONS
PARAMETER
Supply voltage
High-level input voltage
Low-level input voltage
High-level output current
High-level output current,
Operating free-air temperature
Driver
Driver
Driver
Receiver
Driver
Receiver
SYMBOL
V
DD
Vss
Vcc
V
IH
V
IL
I
OH
I
OL
T
a
MIN
7.5
-7.5
4.5
1.9
TYP
9
-9
5
MAX
13.5
-13.5
5.5
0.8
-6
-0.5
6
16
70
UNIT
V
V
V
mA
mA
℃
0
SUPPLY CURRENTS OVER OPERATING FREE-AIR TEMPERATURE RANGE
PARAMETER
Supply current from V
DD
I
DD
Supply current from Vss
Iss
Suppy current from Vcc
Icc
SYMBOL
TEST CONDITIONS
V
DD
=9V, Vss=-9V
V
DD
=12V, Vss=-12V
All inputs at 0.8V, No load V
DD
=9V, Vss=-9V
V
DD
=12V, Vss=-12V
All inputs at 1.9V, No load V
DD
=9V, Vss=-9V
V
DD
=12V, Vss=-12V
All inputs at 0.8V, No load V
DD
=9V, Vss=-9V
V
DD
=12V, Vss=-12V
Vcc=5V,All inputs at 5V, No load
All inputs at 1.9V, No load
MIN
MAX
25
32
7.5
9.5
-25
-32
-5.3
-5.3
20
UNIT
mA
mA
mA
mA
mA
UTC
UNISONIC TECHNOLOGIES CO., LTD.
4
QW-R113-007,A
UTC 75323
PARAMETER
LINEAR INTEGRATED CIRCUIT
SYMBOL
TEST CONDITIONS
MIN
TYP MAX UNIT
ELECTRICAL CHARACTERISTICS OVER OPERATING FREE-AIR TEMPERATURE
RANGE,V
DD
=9V,Vss=-9V,Vcc=5V
(UNLESS OTHERWISE NOTED)
High-level output voltage
V
OH
V
IL
=0.8V,RL=3kΩ (See Figure 1)
6
7.5
V
Low-level output voltage(see Note 2)
V
OL
V
IH
=1.9V,RL=3kΩ (See Figure 1)
-7.5
-6
V
I
IH
High-level Input current
V
I
=5V
(See Figure 2)
10
μA
Low-level input current
I
IL
V
I
=0
(See Figure 2)
-1.6
mA
High-level short-circuit output current
V
IL
=0.8V,Vo=0
(See Figure 1)
I
OS(H)
-4.5
-9
-19.5 mA
(see Note 3)
Low-level short-circuit output current
I
OS(L)
V
IH
=2V,Vo=0
(See Figure 1)
4.5
9
19
mA
r
o
Vcc=V
DD
=Vss=0,Vo=-2V to 2V
Output resistance (see Note 4)
300
Ω
Notes: 2.The algebraic convention, where the more positive(less negative) limit is designated as maximum, is used
in this data sheet for logic levels only,e.g.,if-10V is maximum, the typical value is a more negative voltage.
3.Output short-circuit conditions must maintain the total power dissipation below absolute maximum ratings.
4.Test conditions are those specified by TIA/EIA-232-F and as listed above.
SWITCHING CHARACTERISTICS
(Ta=25℃,VDD=12V,Vss=-12V,Vcc=5V±10%)
PARAMETER
Propagation delay time, low- to
high-level output
Propagation delay time, high-to
low-level output
TTLH Transition time, low-to high-level
output
SYMBOL
t
PLH
t
PHL
TEST CONDITIONS
R
L
=3kΩ to 7kΩ, C
L
=15pF
(See Figure 3)
MIN
TYP MAX UNIT
315
75
500
ns
175
R
L
=3kΩ to 7kΩ, C
L
=15pF
60
100
ns
(See Figure 3)
t
TLH
R
L
=3kΩ to 7kΩ, C
L
=2500pF
μs
1.7
2.5
(See Figure 3 and Note 5)
R
L
=3kΩ to 7kΩ, C
L
=15pF
40
75
ns
(See Figure 3)
Transition time, high-to low-level output
t
THL
R
L
=3kΩ to 7kΩ, C
L
=2500pF
μs
1.5
2.5
(See Figure 3 and Note 6)
Note: 5. Measured between-3-V and 3-V points of the output waveform (TIA/EIA-232-F conditions),all unused inputs
are tied either high or low.
6. Measured between 3-V and –3-V points of the output waveform (TIA/EIA-232-F conditions),all unused inputs
are tied either high or low
ELECTRICAL CHARACTERISTICS OVER RECOMMENDED OPERATING
CONDITIONS
(UNLESS OTHERWISE NOTED)
PARAMETER
Positive-going input threshold voltage
Negative-going input threshold voltage
Input hysteresis voltage(V
IT
+ - V
IT
-)
High-level output voltage
SYMBOL
V
IT+
V
IT-
Vhys
V
OH
TEST CONDITIONS
See Figure5 T
a
=25℃
T
a
=0℃ to 70℃
See Figure5
I
OH
=-0.5mA
V
IH
=0.75V
MIN
1.75
1.55
0.75
0.5
2.6
2.6
TYP* MAX UNIT
1.9
0.97
4
0.2
2.3
2.3
1.25
5
V
0.45
8.3
-8.3
-3.4
-12
V
dB
mA
mA
mA
mA
V
Inputs open
Low-level output voltage
V
OL
I
OL
=10mA,V
I
=3V
V
I
=25V.
High-level input current
I
IH
V
I
=3V
V
I
=-25V
Low-level input current
I
IL
V
I
=-3V
Short-circuit output current
Ios
See Figure 4
* All typical values are at Ta=25℃,Vcc=5V,V
DD
=9V,Vss=-9V
3.6
0.43
-3.6
-0.43
UTC
UNISONIC TECHNOLOGIES CO., LTD.
5
QW-R113-007,A
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