10
9
8
V
OL/
V
OH
(Volts)
7
6
5
4
3
2
1
0
0
2
4
6
8
10
12
14
16
18
20
22
I
OL
/I
OH
(mA)
V
OL
vs I
OL
V
OH
vs I
OH
T IN
T OUT
Figure 4. Mouse Application Drive Capability
Figure 5. Parallel Drivers
Wake-Up Feature
The
SP235B, SP236B, SP240B
and
SP241B
have a wake-up feature that keeps all receivers
in an enabled state when the device is in the
shutdown mode.
Table 2
defines the truth table
for the wake-up function. Timing for the wake-up
function is shown in
Figure 6.
If the
SP235B, SP236B, SP240B
and
SP241B
are powered up in the shutdown state (SD driven
high during V
CC
power up), the part must remain
in a powered on state for a minimum of 3ms
before the wake-up function can be used. After
the 3ms wait time, there is a 2ms delay time
before data is valid for both enable and disable
POWER-UP WITH SD HIGH (charge pump section in shutdown state)
t
0
(power up)
+5V
DATA
R
OUT
VALID
0V
t
WAIT
+5V
SD
0V
POWER-UP WITH SD LOW (charge pump section in active mode)
t
0
(power up)
+5V
DATA
R
OUT
VALID
0V
t
ENABLE
+5V
SD
0V
EXERCISING WAKE–UP FEATURE
t
0
(power up)
+5V
R
OUT
0V
+5V
SD
0V
SPECIFICATIONS:
(V
CC
=+5V±10%, T
A
=25°C)
PARAMETER MIN. TYP.
t
WAIT
2ms
t
ENABLE
1ms
t
ENABLE
t
WAIT
DATA
VALID
t
ENABLE
DATA
VALID
DATA
VALID
t
ENABLE
MAX.
3ms
2ms
Figure 6. Wake–Up and Shutdown Timing
Date: 8/3/04
+ 5V Powered Multi-Channel RS-232 Drivers/Receivers
© Copyright 2004 Sipex Corporation
9
SIPEX [ SIPEX CORPORATION ]
