MAX3243
3 V TO 5.5 V MULTICHANNEL RS 232 LINE DRIVER/RECEIVER
WITH
±15
kV ESD (HBM) PROTECTION
SLLS350L − APRIL 1999 − REVISED MARCH 2004
AUTO-POWERDOWN SECTION
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (see Figure 5)
PARAMETER
VT+(valid)
VT−(valid)
VT(invalid)
VOH
VOL
Receiver input threshold
for INVALID high-level output voltage
Receiver input threshold
for INVALID high-level output voltage
Receiver input threshold
for INVALID low-level output voltage
INVALID high-level output voltage
INVALID low-level output voltage
TEST CONDITIONS
FORCEON = GND,
FORCEOFF = VCC
FORCEON = GND,
FORCEOFF = VCC
FORCEON = GND,
FORCEOFF = VCC
IOH = −1 mA, FORCEON = GND,
FORCEOFF = VCC
IOL = 1.6 mA, FORCEON = GND,
FORCEOFF = VCC
−2.7
−0.3
VCC−0.6
0.4
0.3
MIN
TYP†
MAX
2.7
UNIT
V
V
V
V
V
† All typical values are at VCC = 3.3 V or VCC = 5 V, and TA = 25°C.
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (see Figure 5)
PARAMETER
tvalid
tinvalid
Propagation delay time, low- to high-level output
Propagation delay time, high- to low-level output
MIN
TYP†
1
30
100
MAX
UNIT
µs
µs
µs
ten
Supply enable time
† All typical values are at VCC = 3.3 V or VCC = 5 V, and TA = 25°C.
PARAMETER MEASUREMENT INFORMATION
3V
RS-232
Output
50
Ω
RL
3V
FORCEOFF
TEST CIRCUIT
CL
(see Note A)
Output
6V
SR(tr)
+
t
THL
or t
TLH
Input
0V
tTHL
3V
−3 V
VOLTAGE WAVEFORMS
tTLH
3V
−3 V
VOH
VOL
Generator
(see Note B)
NOTES: A. CL includes probe and jig capacitance.
B. The pulse generator has the following characteristics: PRR = 250 kbit/s, ZO = 50
Ω,
50% duty cycle, tr
≤
10 ns, tf
≤
10 ns.
Figure 1. Driver Slew Rate
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
7
TI [ TEXAS INSTRUMENTS ]
