DS90LV047A Datasheet, PDF (7/12 Pages) National Semiconductor (TI) – 3V LVDS Quad CMOS Differential Line Driver

Applications Information (Continued)
3. Shorted Inputs. If a fault condition occurs that shorts
the receiver inputs together, thus resulting in a 0V differ-
ential input voltage, the receiver output will remain in a
HIGH state. Shorted input fail-safe is not supported
across the common-mode range of the device (GND to
2.4V). It is only supported with inputs shorted and no ex-
ternal common-mode voltage applied.
External lower value pull up and pull down resistors (for a
stronger bias) may be used to boost fail-safe in the presence
of higher noise levels. The pull up and pull down resistors
should be in the 5kΩ to 15kΩ range to minimize loading and
waveform distortion to the driver. The common-mode bias
point should be set to approximately 1.2V (less than 1.75V)
to be compatible with the internal circuitry.
FIGURE 7. Driver Output Levels
DS100887-9
Pin Descriptions
Pin No.
2, 3, 6, 7
10, 11, 14,
15
9, 12, 13,
16
1
Name
D_IN
D_OUT+
D_OUT−
EN
Description
Driver input pin, TTL/CMOS
compatible
Non-inverting driver output pin,
LVDS levels
Inverting driver output pin, LVDS
levels
Driver enable pin: When EN is
low, the driver is disabled. When
EN is high and EN* is low or
open, the driver is enabled. If
both EN and EN* are open
circuit, then the driver is
disabled.
Pin No.
8
4
5
Name
EN*
V_CC
GND
Description
Driver enable pin: When EN* is
high, the driver is disabled.
When EN* is low or open and
EN is high, the driver is enabled.
If both EN and EN* are open
circuit, then the driver is
disabled.
Power supply pin, +3.3V ± 0.3V
Ground pin
Ordering Information
Operating
Temperature
−40˚C to +85˚C
−40˚C to +85˚C
Package Type/
Number
SOP/M16A
TSSOP/MTC16
Order Number
DS90LV047ATM
DS90LV047ATMTC
7
www.national.com