DS89C386TMEA National Semiconductor, DS89C386TMEA Datasheet - Page 5

• Manufacturer Part Number: DS89C386TMEA
• Description: Line Receiver IC
• Manufacturer: National Semiconductor

Specifications of DS89C386TMEA

• Termination Type: SMD
• Driver Case Style: SSOP
• No. Of Pins: 48
• Mounting Type: Surface Mount
• Operating Temperature Range: -40°C To +85°C
• Supply Voltage Min: 4.5V
• Output Current Max: 25mA
• No. Of Driver/receivers: 0/1
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Parameter Measurement Information
C
S1 = V
S1 = GND for t
S1 = Open for t
Application Information
* R
SKEW
Skew may be thought of in a lot of different ways, the next
few paragraphs should clarify what is represented by t
this datasheet and how it is determined. Skew, as used in
this databook, is the absolute value of a mathematical differ-
ence between two propagation delays. This is commonly
accepted throughout the semiconductor industry. However,
there is no standardized method of measuring propagation
delay, from which skew is calculated, of differential line re-
ceivers. Elucidating, the voltage level, at which propagation
L
T
Includes load and test jig capacitance.
is optional although highly recommended to reduce reflections.
CC
for t
PZL
PZH
PLH
, and t
, and t
, t
PHL
PLZ
, and t
PHZ
measurements.
measurements.
SK
.
FIGURE 3. TRI-STATE Output Enable and Disable Waveforms
FIGURE 2. Test Circuit for Switching Characteristics
FIGURE 4. Two-Wire Balanced System, RS-422
SK
in
5
(Continued)
delays are measured, on both input and output waveforms
are not always consistant. Therefore, skew calculated in this
datasheet, may not be calculated the same as skew defined
in another. This is important to remember whenever making
a skew comparison.
Skew may be calculated for the DS89C386, from many
different propagation delay measurements. They may be
classified into two categories, single-ended and differential.
Single-ended skew is calculated from t
01208505
01208507
PHL
01208506
and t
www.national.com
PLH
propa-