Datasheet
DS90C363, DS90CF364
SNLS123C –SEPTEMBER 1999–REVISED APRIL 2013
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Pin Diagrams
Figure 23. DS90C363 Figure 24. DS90CF364
See Package Number DGG (R-PDSO-G48) See Package Number DGG (R-PDSO-G48)
Truth Table
Table 1. Programmable Transmitter
Pin Condition Strobe Status
R_FB R_FB = V
CC
Rising edge strobe
R_FB R_FB = GND Falling edge strobe
APPLICATIONS INFORMATION
The DS90C363 and DS90CF364 are backward compatible with the existing 5V FPD Link transmitter/receiver pair
(DS90CF563 and DS90CF564). To upgrade from a 5V to a 3.3V system the following must be addressed:
1. Change 5V power supply to 3.3V. Provide this supply to the V
CC
, LVDS V
CC
and PLL V
CC
of both the
transmitter and receiver devices. This change may enable the removal of a 5V supply from the system, and
power may be supplied from an existing 3V power source.
2. The DS90C363 (transmitter) incorporates a rise/fall strobe select pin. This select function is on pin 14,
formerly a V
CC
connection on the 5V products. When the rise/fall strobe select pin is connected to V
CC
, the
part is configured with a rising edge strobe. In a system currently using a 5V rising edge strobe transmitter
(DS90CR563), no layout changes are required to accommodate the new rise/fall select pin on the 3.3V
transmitter. The V
CC
signal may remain at pin 14, and the device will be configured with a rising edge strobe.
– When converting from a 5V falling edge transmitter (DS90CF563) to the 3V transmitter a minimal
board layout change is necessary. The 3.3V transmitter will not be configured with a falling edge strobe
if V
CC
remains connected to the select pin. To guarantee the 3.3V transmitter functions with a falling edge
strobe pin 14 should be connected to ground OR left unconnected. When not connected (left open) and
internal pull-down resistor ties pin 14 to ground, thus configuring the transmitter with a falling edge strobe.
3. The DS90C363 transmitter input and control inputs accept 3.3V TTL/CMOS levels. They are not 5V tolerant.
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Product Folder Links: DS90C363 DS90CF364