SP504EB Datasheet, PDF (11/18 Pages) Sipex Corporation – Evaluation Board Manual

SP504  SP505
SP504 from
pin 2 RDEC0
pin 3 RDEC1
pin 4 RDEC2
pin 5 RDEC3
pin 8
N/C
pin 9 TDEC3
pin 10 TDEC2
pin 11 TDEC1
pin 12 TDEC0
pin 18 V35_STAT
function
TTL Input
TTL Input
TTL Input
TTL Input
N/C
TTL Input
TTL Input
TTL Input
TTL Input
TTL Output
Pinout Changes
to
/SDEN
/TREN
/RSEN
/LLEN
/LATCH
DEC3
DEC2
DEC1
DEC0
/RLEN
function
TTL Input
TTL Input
TTL Input
TTL Input
TTL Input
TTL Input
TTL Input
TTL Input
TTL Input
TTL Input
SP505
pin 2
pin 3
pin 4
pin 5
pin 8
pin 9
pin 10
pin 11
pin 12
pin 18
Summary
In the SP504, pins 2-5 control the Mode Input Word used to configure the receivers. Pin 8 is
No Connection and pin 18 is the V35_STAT status notification output which is often used to
control the V.35 150 ohm termination resistor switches. Pins 9-12 are for the driver Mode Input
Word.
In the SP505, the 4 receiver Mode Input Bits and the 4 driver Mode Input Bits are combined into
a single 4 bit Mode Input Word. Pins 2-5 control the ENABLE (active low) function for the drivers
TxD, DTR, RTS & LL, respectively. Pin 8 controls the transparent latch /LATCH (active low)
function, used to latch in the last Mode Input Word. Pin 18 controls the ENABLE (active low)
function for the RL driver. Pins 9-12 control the combined Mode Input Word DEC3, DEC2, DEC1
& DEC0, respectively.
504/505AppNote/03
New SP504/505 Evaluation Board
11
© Copyright 2000 Sipex Corporation