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ETIC

26ET31C Datasheet Preview

26ET31C Datasheet

QUAD DIFFERENTIAL LINE DRIVER

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QUAD DIFFERENTIAL LINE DRIVER
(Pin compatible with 26LS31 in applications which
do not require an enable function.)
26ET31C
FEATURES
Supply Voltage Range 4.75V to 30V
Operation to 800KHz
CMOS and TTL Compatible Inputs
Outputs RS-422A Compatible
High Impedance Buffered Inputs with
Hysteresis
Outputs short circuit protected
70mA peak SINK current
Outputs Protected by Thermal Shut-Down
MSL level 2
DESCRIPTION
These line drivers are similar to the popular 26LS31 device, but without the enable function. They provide the
additional supply voltage range necessary for use in many industrial control applications. Outputs are compatible
with RS-422A, but they allow use of supplies up to 30V. Output voltage swings up to VCC-2V are typical. The
outputs are protected against shorts to ground by a two-fold scheme of current limiting and thermal shutdown.
Thermal shutdown is accomplished by monitoring junction temperature and comparing this to a band gap
reference on chip.
Input hysteresis of about 0.5V provides good noise margin, even in noisy industrial control environments. Input to
output propagation delays of less than 200ns are typical for rising and falling edges of the input waveform,
measured to the zero crossing of the differential outputs.
ABSOLUTE MAXIMUM RATINGS
Parameter
Symbol
Operating Temperature Range TA
Supply Voltage Range
VCC
Min.
-40
4.75
Max.
115
30
Units
°C
V
Ref.
Note 1.
ETIC RESERVES THE RIGHT TO MAKE CHANGES AT ANY TIME TO IMPROVE THE DESIGN AND TO SUPPLY THE BEST PRODUCT.
East Texas Integrated Circuits USA 275 W. Campbell Road Suite 310 Richardson, Texas 75080 Tel (972) 234-5656 Fax (972) 234-5657
Visit our website at www.etic-avago.com, or send us email at sales@etic-avago.com.
Page 1 of 3




ETIC

26ET31C Datasheet Preview

26ET31C Datasheet

QUAD DIFFERENTIAL LINE DRIVER

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ELECTRICAL CHARACTERISTICS
Unless otherwise specified, typical values given at VCC=12V, TA = 25°C, and EN- <0.8V.
Parameters
Overtemp Operate Point (junction)
Overtemp Release Point (junction)
Supply Current
Input Positive-Going Threshold
Input Negative-Going Threshold
Low Level Input Current
High Level Input Current
Low Level Output
Low Level Output
High Level Output
High Level Output
Symbol
TJOP
TJRP
Icc1
Icc2
VT+
VT-
IIL
IIH
VOL
VOL
VOH
VOH
Min.
7.0
9.0
1.1
0.7
2.5
27.8
Typ.
155
105
11.0
13.0
1.5
1.0
-0.13
0
375
375
2.8
28.0
Max.
17.0
20.0
1.9
1.4
-4.0
4.0
500
500
Units
°C
°C
mA
V
V
µA
µA
mV
mV
V
V
Test Conditions
Note 1.
Note 1.
Vcc = 5 V (Icc1)
Vcc = 30.0V (Icc2)
VIN = 0V, VCC = 30V
VIN = 30V, VCC = 30V
IOL = 20mA, VCC = 5V
IOL = 20mA, VCC = 30V
IOH = -20mA, VCC = 5V
IOH = -20mA, VCC = 30V
AC SWITCHING CHARACTERISTICS
Values given at VCC = 24V, TA = 25°C, CL = 100pF on all outputs. (See note 2.)
Parameters
Propagation delay, rising input 50%
point to zero crossing of differential
outputs
Propagation delay, falling input 50%
point to zero crossing of differential
outputs
Output Rise Time
Output Fall Time
Symbol
TPLH
Min.
Typ. Max. Units
150 285 ns
TPHL
170 310 ns
TR 95 200 ns
TF 40 165 ns
Test Conditions
NOTES:
1. This is not a test parameter, but for information only.
2. It may be necessary to clamp the outputs with Schottky diodes when driving extemely long
cables with high capacitance between outputs. These diodes should have a forward voltage
of less than 0.4V, and be connected with cathode to the output and anode to ground.
ETIC RESERVES THE RIGHT TO MAKE CHANGES AT ANY TIME TO IMPROVE THE DESIGN AND TO SUPPLY THE BEST PRODUCT.
East Texas Integrated Circuits USA 275 W. Campbell Road Suite 310 Richardson, Texas 75080 Tel (972) 234-5656 Fax (972) 234-5657
Visit our website at www.etic-avago.com, or send us email at sales@etic-avago.com.
Page 2 of 3


Part Number 26ET31C
Description QUAD DIFFERENTIAL LINE DRIVER
Maker ETIC
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