SP3238EECA Ver la hoja de datos (PDF) - Signal Processing Technologies
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SP3238EECA Datasheet PDF : 20 Pages
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ELE CTRICAL CHARACTERISTICS
VCC = +3.0 to +5.5, C1 -C4 = 0.1µF (tested at 3.3V + 5%), C1-C4 = 0.22µF (tested at 3.3V + 10%), C1 = 0.047µF, and C2-C4 = 0.33µF (tested at 5.0V
+ 10%), TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
MIN.
TYP. MAX. UNITS CONDITIONS
TIMING CHARACTERISTICS
Maximum Data Rate
Receiver Propagation Delay
t PHL
t PLH
250
0.15
0.15
kbps RL = 3kΩ, CL = 1000pF, one driver
switching
µS
Receiver input to receiver output,
CL = 150pF
Receiver Output Enable Time
Receiver Output Disable Time
Driver Skew
Receiver Skew
Transition-Region Slew Rate
200
ns Normal operation
200
ns Normal operation
100
ns
I tPLH - tPHL I,TA = 25OC
50
ns
I tPLH - tPHL I
30
V/µs VCC = 3.3V, RL = 3kΩ, TAMB = 25OC,
measurements taken from -3.0V to
+3.0V or +3.0V to -3.0V
TYPICAL PERFOMANCE CHARACTERISTICS
Unless otherwise noted, the following perfomance characteristics apply for VCC = +3.3V, 250kbps data rate, all drivers loaded with 3kΩ, 0.1µF charge
pump capacitors, and TAMB = +25°C.
TRANSMITTER OUTPUT vs. LOAD CAPACITANCE
SLEW RATE vs. LOAD CAPACITANCE
6
4
2
VOH
0
VOL
-2 0
1000
2000
3000
4000
5000
-4
-6
pF
25
20
15
10
5
0
0
1000
2000
3000
pF
4000
5000
POS. SR
NEG SR
60
50
40
30
20
10
0
0
SUPPLY CURRENT vs LOAD CAPACITANCE
1000
2000
3000
pF
4000
5000
250Kbps
120Kbps
20Kbps
Figure 3. Supply Current VS. Load Capacitance when
Transmitting Data
Date: 02/24/05
SP3238EE Intelligent +3.0V to +5.5V RS-232 Transceiver
4
© Copyright 2005 Sipex Corporation
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