ETC UC5180CN

UC5180C
Octal Line Receiver
FEATURES
DESCRIPTION
•
Meets EIA 232E/423A/422A and CCITT
V.10,V.11, V.28, X.26, X.27
•
Single +5V Supply--TTL Compatible
Outputs
•
Differential Inputs Withstand ± 25V
•
Low Open Circuit Voltage for Improved
Failsafe Characteristic
The UC5180C is an octal line receiver designed to meet a wide range
of digital communications requirements as outlined in EIA standards
EIA232E, EIA423A, EIA422A, and CCITT V.10, V.11, V.28, X.26, and
X.27. The UC5180C includes an input noise filter and is intended for
applications employing data rates up to 200 KBPS. A failsafe function
allows these devices to "fail" to a known state under a wide variety of
fault conditions at the inputs.
•
Reduced Supply Current--35 mA Max
•
Input Noise Filter
•
Internal Hysteresis
ABSOLUTE MAXIMUM RATINGS (Note 1)
Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V
Output Sink Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 mA
Output Short Circuit Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Sec
Common Mode Input Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V
Differential Input Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25V
Failsafe Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to VCC
PLCC Power Dissipation, TA = 25°C (Note 2). . . . . . . . . . . . . . . . . . . 1000 mW
DIP Power Dissipation, TA = 25°C (Note 2) . . . . . . . . . . . . . . . . . . . . 1200 mW
Storage Temperature Range. . . . . . . . . . . . . . . . . . . . . . . . . . -65°C to +150°C
Lead Temperature (Soldering, 10 Seconds) . . . . . . . . . . . . . . . . . . . . . . -300°C
Note 1: All voltages are with respect to ground, pin 14. Currents are positive
into, negative out of the specified terminal
Note 2: Consult Packaging Section of Databook for thermal limitations and
considerations of package.
CONNECTION DIAGRAMS
DIL-28 (TOP VIEW)
1/94
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PLCC-28 (TOP VIEW)
UC5180C
DC ELECTRICAL CHARACTERISTICS: Unless otherwise stated these specifications apply for TA = 0°C to +70°C, VCC
= 5V ± 5%, Input Common Mode Range ± 7V, TA =TJ
PARAMETERS
SYMBOL
TEST CONDITIONS
DC Input Resistance
Failsafe Output Voltage
RIN
VOFS
Differential Input High
Threshold
VTH
Differential Input Low
Threshold
VTL
Hysteresis
Open Circuit Input Voltage
Input Capacitance
VH
VICC
CI
High Level Output Voltage
Low Level Output Voltage
VCH
VOL
VID = 1V, IOUT = - 440µA
VID = -1V
(Note 3)
Short Circuit Output
Current
Supply Current
Input Current
IOS
Note 4
ICC
IIN
4.75V ≤ VCC ≤ 5.25V
Other Inputs Grounded
UC5180C
MIN
MAX
3
7
0.45
2.7
3V ≤ | VIN | ≤ 25V
Inputs Open or Shorted
Together, or One Input
Open and One Grounded
0 ≤ IOUT ≤ 8mA, VFAILSAFE = 0V
0 ≥ IOUT ≥ - 400 µA,
VFAILSAFE = VCC
VOUT = 2.7V, IOUT = 440 µA
RS = 0 (Note 2)
(See Figure 1)
RS = 500 (Note 2)
VOUT = 0.45V, IOUT = 440 mA
RS = 0 (Note 2)
(See Figure 1)
RS = 500 (Note 2)
FS = 0V or VCC (See Figure 1)
50
-200
-400
50
20
VIN = +10V
VIN = -10V
kΩ
V
200
400
-50
mV
140
75
20
mV
mV
pF
2.7
IOUT = 4 mA
IOUT = 8 mA
UNITS
mV
V
V
0.4
0.45
100
mA
35
3.25
mA
mA
-3.25
Note 2: RS is a resistor in series with each input.
Note 3: Measured after 100ms warm up (at 0°C)
Note 4: Only 1 output may be shorted at one time
and then only for a maximum of 1 sec.
Figure 1. VtL, VtH, VH Definition
AC ELECTRICAL CHARACTERISTICS: VCC = 5V ± 5%, TA = 0°C to + 70°C, Figure 2, TA = TJ.
PARAMETERS
SYMBOL
Propagation Delay - Low to High
Propagation Delay - High to Low
Acceptance Input Frequency
Rejectable Input Frequency
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tPLH
tPHL
fA
fR
TEST CONDITIONS
CL = 50pF, VIN = ± 500mV
CL = 50pF, VIN = ± 500mV
Unused Input Grounded, VIN = ± 200mV
Unused Input Grounded, VIN = ± 500mV
2
UC5180C
MIN
MAX
550
550
0.1
5.5
UNITS
ns
ns
MHz
MHz
UC5180C
Figure 2. AC Test Circuit
APPLICATIONS INFORMATION
under fault conditions, while a connection to ground
provides a logic "0". There are two failsafe pins (FS1
and FS2) on the UC5180C where each provides common failsafe control for four receivers.
Failsafe Operation
These devices provide a failsafe operating mode to
guard against input fault conditions as defined in
EIA422A and EIA423A standards. These fault conditions are (1) drive in power-off condition, (2) receiver not
interconnected with driver, (3) open-circuited interconnecting cable, and (4) short-circuited interconnecting
cable. If one of these four fault conditions occurs at the
inputs of a receiver, then the output of that receiver is
driven to a known logic level. The receiver is programmed by connecting the failsafe input to VCC or
ground. A connection to VCC provides a logic "1" output
Input Filtering (UC5180C)
The UC5180C has input filtering for additional noise rejection. This filtering is a function of both signal level
and frequency. For the specified input (5.5 MHz at ±500
mV) the input stage filter attenuates the signal such that
the output stage threshold levels are not exceeded and
no change of state occurs at the output.
EIA232E/V.28 / EIA423A/V.10 DATA TRANSMISSION
EIA422A/V.11 DATA TRANSMISSION
UNITRODE INTEGRATED CIRCUITS
7 CONTINENTAL BLVD. • MERRIMACK, NH 03054
TEL. (603) 424-2410 • FAX (603) 424-3410
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3
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