SP3508EB Datasheet, PDF (3/13 Pages) Sipex Corporation – Evaluation Board Manual

SP508 EVALUATION BOARD
BOARD LAYOUT
1. The SP3508 Evaluation Board has been
designed to easily and conveniently provide
access to all inputs and outputs under test.
2. Figure 1 is a schematic of the evaluation
board. The schematic shows the location of
the driver and receiver access points as well
as the Jumpers,
Connector.
V_CC,
GND
and
the
DB-25
3. Figure 3 to Figure 6 shows the layout of
the SP3508 Evaluation Board.
4. I/O Pinouts
The SP3508 Evaluation Board has been
designed to easily and conveniently provide
access to all inputs and outputs to the device
under test. Each Driver has probe points for
the inputs and outputs. Each Receiver has
probe points for the inputs and outputs.
5. At the left of the board is a set of jumpers.
Each driver and receiver has its own indi-
vidual enable pin. This set of jumpers con-
trols the enabling and disabling of each
driver of receiver. Another set of jumpers is
to configure the 3 bit decoder, to enable/
disable loopback, to enable/disable latch
and to enable/disable term_off functions. In
addition, JP1 - JP4 allow the user to choose
which signals the user can access through
the DB-25 connector. JP5 allows the user to
set the driver
source.
input
to
GND,
V_CC
or
external
6. Also located on the SP3508 evaluation
board are six 1uf charge pump capacitors, a
1µF bypass capacitor
termination resistors.
for
V_CC
and
two
50Ω
7. 1 Pomona BNC female connector is
mounted on the board to provide input signal
for evaluation.
8. Figure 2 shows a RS-232 & EIA530 DB-
25 Connector.
9. Table 1 shows the pinout of the DB-25
connector used to connect to a communica-
tion analyzer such as the TTC Firebird 6000.
1
13
14
25
Figure 2. RS-232 & EIA530 Connector (ISO 2110), DTE
Connector σ DB-25 Male, DCE Connector σ DB-25
Female
Rev. 8/28/03
SP3508 Evaluation Board Manual
3
© Copyright 2003 Sipex Corporation