Texas Instruments UC5181CQTR, UC5181CQ, UC5181CN Datasheet
Octal Line Receiver
FEATURES
• Meets EIA232E/423A/422A and CCITT
V.10, V.11, V.28, X.26, X.27
• Single +5V Supply—TTL Compatible
Outputs
• Differential Inputs withst and ±25V
• Low Open Circuit Voltage for Improved
Failsafe Characteristic
• Reduced Supply Current—35mA Max
• Internal Hysteresis
DESCRIPT ION
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.
ABSOLUTE MAXI MUM RATING S (Note 1)
Supply Voltage, V
CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V
Output Sink Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50mA
Output Short Circu it Tim e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Sec
Common Mode Input Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V
Differ enti al In put R ange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25V
Failsafe Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to V
CC
PLCC Power Dissipation , TA=25° C (Note 2). . . . . . . . . . . . . . . . . . . 1000 m W
DIP Power D issipat ion, T
A=25° C (Not e 2). . . . . . . . . . . . . . . . . . . . . 1200 mW
Storag e Temperatur e Range . . . . . . . . . . . . . . . . . . . . . . . . -65° C to +150° C
Lead Temp era ture (Solder ing, 10 seconds). . . . . . . . . . . . . . . . . . . . . . -300° C
Note 1: All voltages are with respec t to ground , pin 14. Current s are posit ive in,
negative out of the specif ied terminal.
Note 2: Consult packaging section of Databoo k for ther mal limitations an d
consideration s of packa ge.
CONNECTION DIAGRAMS
UC5181C
DIL-28 (TOP VIEW) PLCC-28 (TOP VIEW)
1/94
DC ELECTRICAL CHARACTERI STICS:
PARAMETER SYMBOL TEST CONDITIONS UC5181C UNITS
MIN MAX
DC Input Resistance R
IN 3V ≤ |VIN|≤25V 3 7 kΩ
Failsafe Output Voltage V
OFS Input s Open or Shorted
Together, or One Input Open
and One Grounded
0≥IOUT≤8mAVFAILSAFE=0V 0.45 V
0≥I
OUT≥-400µA, VFAILSAFE=VCC
2.7
Differential In put High
Threshold
V
TL VOUT= 0.45V, IOUT = -440µA (See Figure
1)
RS = 0 (Note 3) 50 200 mV
R
S = 500 (Note 3) 400
Differential In put Low
Threshold
V
TL VOUT = 0.45V, IOUT = 8 mA (See Figure
1)
RS = 0 (Note 3) -200 -50 mV
R
S = 500 (Not e 3) -400
Hysteresis V
H FS=0V or VCC (See Figure 1) 45 140 mV
Open Circuit Input Voltage V
IOC 75 mV
Input Capacita nce C
I 20 pF
High Level Output Voltage V
OH
VID = 1V, IOUT = -440 µA2.7V
Low Level Output Volta ge V
OL
VID = -1V (Note 4)
I
OUT = 4 mA 0.4 V
I
OUT = 8 mA 0.45
Short Circuit Output
Current
I
OS Note 5 20 100 mA
Supply current I
CC 4.75V ≤VCC≤5.25V 35 mA
Input Curren t I
IN
Other Inputs Grounded
V
IN = +10V 3.25 mA
V
IH = -10V -3.25
PARAMETER SYMBOL TEST CONDITIONS UC5181C UNITS
MIN MAX
Propagation Delay–Low to High t
PLH CL=50pF, VIN=
±
500 mV (Note 6) 120 ns
Propagation Dela y–High to Low t
PHL CL=50pF, VIN=
±
500 mV (Note 6) 120 ns
Acceptable Input f requenc y f
A Unused Input Grounded, VIN=
±
200 mV 5.0 MHz
Note 3: RS is a resistor in series with each input.
Note 4: Measur e aft er 10 0 ms wa rm up (a t 0
°
C).
Note 5: Only 1 output may be sh ort ed at a time and t hen on ly for a
maximum of 1 sec.
Note 6: The delays, eith er t
PLH
or t
PHL
, shall not var y from receiver to
receiver by more than 35ns.
Figure 2. AC Te st Circuit
AC ELECTRICAL CHARACTERIST ICS :
Figure 1. VTL, VTH,VH Definition
UC5181C
Unless otherwise st ated, these specif icat ions apply fo r TA = 0°C to +70°C; VCC
= 5V ±5%, Input Common Mode Range ±7V, TA=TJ.
VCC=5V ±5%. TA=0°C to +70°C, Figur e 2 TA=TJ.
2
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