SN65C3221, SN75C3221

3V TO 5.5V SINGLECHANNEL RS232 COMPATIBLE LINE DRIVER/RECEIVER

SLLS351E − APRIL 2002 − REVISED OCTOBER 2004

6

POST OFFICE BOX 655303

AUTO-POWERDOWN SECTION

electrical characteristics over recommended ranges of supply voltage and operating free-air

temperature (unless otherwise noted) (see Figure 5)

PARAMETER

TEST CONDITIONS

MIN

MAX

UNIT

VT+(valid)

Receiver input threshold

for INVALID high-level output voltage

FORCEON = GND,

FORCEOFF = VCC

2.7

V

VT−(valid)

Receiver input threshold

for INVALID high-level output voltage

FORCEON = GND,

FORCEOFF = VCC

−2.7

V

VT(invalid)

Receiver input threshold

for INVALID low-level output voltage

FORCEON = GND,

FORCEOFF = VCC

−0.3

0.3

V

VOH

INVALID high-level output voltage

IOH = −1 mA, FORCEON = GND,

FORCEOFF = VCC

VCC−0.6

V

VOL

INVALID low-level output voltage

IOL = 1.6 mA, FORCEON = GND,

FORCEOFF = VCC

0.4

V

switching characteristics over recommended ranges of supply voltage and operating free-air

temperature (unless otherwise noted) (see Figure 5)

PARAMETER

MIN

TYP†

MAX

UNIT

tvalid

Propagation delay time, low- to high-level output

1

µs

tinvalid

Propagation delay time, high- to low-level output

30

µs

ten

Supply enable time

100

µs

† All typical values are at VCC = 3.3 V or VCC = 5 V, and TA = 25°C.