2
TGoddard/SP332/9617R0
SP332 RS-232/RS-485 Multi-Mode Serial Transceiver
Copyright 2000 Sipex Corporation
SPECIFICATIONS
T
MIN
to T
MAX
and V
CC
= 5V
±
5% unless otherwise noted.
PARAMETER
RS-485 DRIVER
DC Characteristics
Differential Output Voltage
Differential Output Voltage
MIN.
TYP.
MAX.
UNITS
CONDITIONS
GND
2.0
V
CC
5.0
Volts
Volts
Unloaded; R=
∞
; see figure 1
With Load; R=50
(RS-422);
see figure 1
With Load; R=27
(RS-485);
see figure 1
Differential Output Voltage
1.5
5.0
Volts
Change in Magnitude of Driver
Differential Output Voltage for
Complementary States
Driver Common-Mode Output
Voltage
Input High Voltage
0.2
Volts
R=27
or R=50
; see figure 1
3
Volts
Volts
R=27
or R=50
; see figure 1
Applies to transmitter inputs,
SEL A, SEL B, SD, LB
Applies to
SEL A, SEL B, SD, LB
Applies to:
transmitter inputs, LB
SEL A, SEL B, SD,
2.0
Input Low Voltage
0.8
Volts
Input Current
Pull-Up Current
Pull-Down Current
Driver Short-Circuit
Current
V
OUT
= HIGH
V
OUT
= LOW
±
10
μ
A
μ
A
μ
A
1.5
3.0
35
35
250
250
mA
mA
-7V
≤
V
O
≤
10V
-7V
≤
V
O
≤
10V
AC Characteristics
Driver Data Rate
Driver Input to Output
t
Driver Input to Output
t
Driver Skew
10
Mbps
ns
70
180
R
=54
, C
=C
=100pF;
see figures 3 and 6
R
=54
, C
=C
=100pF;
see figures 3 and 6
From output to output;
see figures 3 and 6
From 10% to 90%; R
=54
,
C
L1
=C
L2
=100pF; see figures 3 and 6
70
180
ns
5
10
ns
Driver Rise or Fall Time
3
15
40
ns
RS-485 RECEIVER
DC Characteristics
Differential Input Threshold
Input Hysteresis
Output Voltage High
Output Voltage Low
Input Resistance
Input Current (A, B); V
IN
= 12V
-0.2
+0.2
Volts
mV
Volts
Volts
k
mA
-7V
≤
V
CM
≤
12V
V
CM
=0V
I
O
=-4mA, V
ID
=+200mV
I
=+4mA, V
ID
=-200mV
-7V
≤
V
≤
12V
V
= 12V, A is the non-inverting
receiver input. B is the inverting
receiver input
V
IN
= -7V
0V
≤
V
CM
≤
V
CC
70
3.5
0.4
12
15
+1.5
Input Current (A, B); V
IN
= -7V
Short Circuit Current
-0.8
85
mA
mA
ABSOLUTE MAXIMUM RATINGS
These are stress ratings only and functional operation of the device at
these ratings or any other above those indicated in the operation sections
of the specifications below is not implied. Exposure to absolute maximum
rating conditions for extended periods of time may affect reliability.
V
............................................................................................................+12V
Input Voltages
Logic........................................................-0.5V to (V
CC
+0.5V)
Drivers..................................................-0.5V to (V
CC
+0.5V)
Receivers.................................................
±
30V@
≤
100mA
Driver Outputs......................................................................................
±
15V
Storage Temperature..................................................-65C to +150C
Power Dissipation..........................................................................1000mW