TI UC5181C

UC5181C
Octal Line Receiver
FEATURES
DESCRIPTION
•
Meets EIA232E/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 UC5181C is an octal line receiver designed to meet a wide range
of digital communications requirements as outlined in EIA standards
EIA232E, EIA422A, EIA423A and CCITT V.10, V.11, V.28, X.26, and
X.27. The UC5181C is similar to the UC5180C, but without the input
filtering. Thus, it covers the entire range of data rates up to 10MBPS. 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—35mA Max
•
Internal Hysteresis
ABSOLUTE MAXIMUM RATINGS (Note 1)
Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V
Output Sink Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50mA
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 in,
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
PLCC-28 (TOP VIEW)
UC5181C
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.
PARAMETER
SYMBOL
DC Input Resistance
Failsafe Output Voltage
RIN
VOFS
Differential Input High
Threshold
VTL
Differential Input Low
Threshold
VTL
Hysteresis
Open Circuit Input Voltage
Input Capacitance
High Level Output Voltage
Low Level Output Voltage
VH
VIOC
CI
VOH
VOL
Short Circuit Output
Current
Supply current
Input Current
TEST CONDITIONS
3V ≤ |VIN|≤25V
Inputs Open or Shorted
Together, or One Input Open
and One Grounded
0≥IOUT≤8mAVFAILSAFE=0V
0≥IOUT≥-400µA, VFAILSAFE=VCC
VOUT= 0.45V, IOUT = -440µA (See Figure RS = 0 (Note3)
1)
RS = 500 (Note 3)
VOUT = 0.45V, IOUT = 8 mA (See Figure RS = 0 (Note 3)
1)
RS = 500 (Note 3)
FS=0V or VCC (See Figure 1)
UC5181C
MIN
MAX
3
7
0.45
2.7
50
-200
-400
45
VID = 1V, IOUT = -440 µA
IOS
Note 5
ICC
IIN
4.75V ≤VCC≤5.25V
20
Other Inputs Grounded
VIN = +10V
VIH = -10V
kΩ
V
200
400
-50
mV
140
75
20
mV
mV
pF
V
V
2.7
IOUT = 4 mA
IOUT = 8 mA
VID = -1V (Note 4)
UNITS
0.4
0.45
100
35
3.25
mV
mA
mA
mA
-3.25
Note 3: RS is a resistor in series with each input.
Note 4: Measure after 100 ms warm up (at 0°C).
Note 5: Only 1 output may be shorted at a time and then only for a
maximum of 1 sec.
Note 6: The delays, either tPLH or tPHL, shall not vary from receiver to
receiver by more than 35ns.
Figure 1. VTL, VTH,VH Definition
AC ELECTRICAL CHARACTERISTICS: VCC=5V ±5%. TA=0°C to +70°C, Figure 2 TA=TJ.
PARAMETER
Propagation Delay–Low to High
Propagation Delay–High to Low
Acceptable Input frequency
SYMBOL
tPLH
tPHL
fA
TEST CONDITIONS
CL=50pF, VIN= ±500 mV (Note 6)
CL=50pF, VIN= ±500 mV (Note 6)
Unused Input Grounded, VIN= ±200 mV
Figure 2. AC Test Circuit
2
UC5181C
UNITS
MIN
MAX
120
ns
120
ns
5.0
MHz
UC5181C
APPLICATIONS INFORMATION
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 under fault conditions, while a connection to ground provides a logic ”0". There are two failsafe
pins (FS1 and FS2) on the UC5181C 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) driver
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,
EIA232E/V.28 / EIA423A/V.10 DATA TRANSMISSION
EIA423A/V.10
EIA422A/V.11 DATA TRANSMISSION
GENERAL LAYOUT NOTES
system (no resistance), currents exceed 80 amps with
less than a nanosecond rise time. A transzorb provides
two functions, the device capacitance inherently acts as a
filter capacitor, and the device clamps the ESD and EOS
pulses which would pass through the capacitor and destroy the devices. The recommended transzorb for the
UC5180C and the UC5181C is P6KE22CA.
The drivers and receivers should be mounted close to the
system common ground point, with the ground reference
tied to the common point to reduce RFI/EMI.
Filter connectors or transzorbs should be used to reduce
the RFI/EMI, and protecting the system from static (ESD),
and electrical overstress (EOS). A filter connector or capacitor will reduce the ESD pulse by 90% typically. A cable dragged across a carpet and connected to a system
can easily be charged to over 25,000 volts. This is a metal to metal contact when the cable is connected to the
* Transzorb is a trademark of General Semiconductor
Industries.
UNITRODE INTEGRATED CIRCUITS
7 CONTINENTAL BLVD. • MERRIMACK, NH 03054
TEL. (603) 424-2410 • FAX (603) 424-3460
3
IMPORTANT NOTICE
Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue
any product or service without notice, and advise customers to obtain the latest version of relevant information
to verify, before placing orders, that information being relied on is current and complete. All products are sold
subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those
pertaining to warranty, patent infringement, and limitation of liability.
TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in
accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent
TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily
performed, except those mandated by government requirements.
CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF
DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL
APPLICATIONS”). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR
WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER
CRITICAL APPLICATIONS. INCLUSION OF TI PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO
BE FULLY AT THE CUSTOMER’S RISK.
In order to minimize risks associated with the customer’s applications, adequate design and operating
safeguards must be provided by the customer to minimize inherent or procedural hazards.
TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent
that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other
intellectual property right of TI covering or relating to any combination, machine, or process in which such
semiconductor products or services might be or are used. TI’s publication of information regarding any third
party’s products or services does not constitute TI’s approval, warranty or endorsement thereof.
Copyright  1999, Texas Instruments Incorporated
IMPORTANT NOTICE
Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue
any product or service without notice, and advise customers to obtain the latest version of relevant information
to verify, before placing orders, that information being relied on is current and complete. All products are sold
subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those
pertaining to warranty, patent infringement, and limitation of liability.
TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in
accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent
TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily
performed, except those mandated by government requirements.
CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF
DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL
APPLICATIONS”). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR
WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER
CRITICAL APPLICATIONS. INCLUSION OF TI PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO
BE FULLY AT THE CUSTOMER’S RISK.
In order to minimize risks associated with the customer’s applications, adequate design and operating
safeguards must be provided by the customer to minimize inherent or procedural hazards.
TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent
that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other
intellectual property right of TI covering or relating to any combination, machine, or process in which such
semiconductor products or services might be or are used. TI’s publication of information regarding any third
party’s products or services does not constitute TI’s approval, warranty or endorsement thereof.
Copyright  2000, Texas Instruments Incorporated