SP334CT-L-TR Datasheet, PDF (3/14 Pages) Exar Corporation – Programmable RS-232/RS-485 Transceiver

SPECIFICATIONS
Limits are specifed at T_A = 25°C and V_CC = +5.0V unless otherwise
PARAMETER
MIN.
TYP.
RS-232 RECEIVER (continued)
AC Characteristics
Maximum Data Rate
120
235
MAX. UNITS CONDITIONS
kbps
Propagation Delay t_PHL
Propagation Delay t_PLH
RS-485 DRIVER
0.25
1
0.25
1
µs Measured from 50% of V_IN to 1.5V
µs
of V_OUT
DC Characteristics
Open circuit Voltage
6.0
Volts
Differential Output
1.5
Balance
Common-Mode Output
5.0
+/-0.2
3.0
Volts
Volts
Volts
R_L = 54Ω, C_L = 50pF
|V_T| - |V_T|
Output Current
28.0
mA R_L = 54Ω
Short Circuit Current
+/-250 mA Terminated in -7V to +10V
AC Characteristics
Maximum Data Rate
Maximum Data Rate
Output Transition Time
10
30
Mbps R_L = 54Ω
8
Mbps R_L = 54Ω, T_A = +85°C, Note 1
ns Rise/Fall time, 10%-90%
Propagation Delay t_PHL
Propagation Delay t_PLH
Driver Output Skew
RS-485 RECEIVER
80
120
ns See Figures 3 & 5, R_DIFF = 54Ω,
80
120
ns
C_L1 = C_L2 = 100pF
5
20
ns
Per Figure 5, t_SKEW = |t_DPHL - t_DPLH|
DC Characteristics
Common Mode Range
-7.0
+12 Volts
Receiver Sensitivity
Input Impedance
AC Characteristics
+/-0.2 Volts -7V ≤ V_CM ≤ +12V
12
15
kΩ -7V ≤ V_CM ≤ +12V
Maximum Data Rate
10
Mbps
Maximum Data Rate
Propagation Delay t_PHL
Propagation Delay t_PLH
Differential Receiver Skew
ENABLE TIMING
8
Mbps T_A = +85°C, Note 1
130
200
ns See Figures 3 & 7, R_DIFF = 54Ω,
130
200
ns
C_L1 = C_L2 = 100pF
10
20
ns
t_SKEW = |t_PHL - t_PLH|, R_DIFF = 54Ω,
C_L1 = C_L2 = 100pF, see Figure 8
RS-485 DRIVER
Enable Time (see Figures 4 and 6)
Enable to LOW
Enable to HIGH
100
150
ns C_L = 15pF, S₁ Closed
100
150
ns C_L = 15pF, S₂ Closed
Note 1: Exceeding the maximum data rate of 8Mbps at T_A = 85°C may damage the device.
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com

SP334_100_090909