MAX3238

3V TO 5.5V MULTICHANNEL RS232 LINE DRIVER/RECEIVER

WITH ±15kV ESD (HBM) PROTECTION

SLLS349J − JUNE 1999 − REVISED MARCH 2004

6

POST OFFICE BOX 655303

RECEIVER SECTION

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

temperature (unless otherwise noted) (see Note 4 and Figure 6)

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

VOH

High-level output voltage

IOH = −1 mA

VCC−0.6 V

VCC−0.1 V

V

VOL

Low-level output voltage

IOL = 1.6 mA

0.4

V

VIT+

Positive-going input threshold voltage

VCC = 3.3 V

1.5

2.4

V

VIT+

Positive-going input threshold voltage

VCC = 5 V

1.8

2.4

V

VIT−

Negative-going input threshold voltage

VCC = 3.3 V

0.6

1.2

V

VIT−

Negative-going input threshold voltage

VCC = 5 V

0.8

1.5

V

Vhys

Input hysteresis (VIT+ − VIT−)

0.3

V

Ioff

Output leakage current (except ROUT1B)

FORCEOFF = 0 V

±0.05

±10

µA

ri

Input resistance

VI = ±3 V to ±25 V

3

5

7

k

Ω

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

NOTE 4: Testing supply conditions are C1−C4 = 0.1

µF at VCC = 3.3 V ± 0.15 V; C1−C4 = 0.22 µF at VCC = 3.3 V ± 0.3 V; and C1 = 0.047 µF

and C2−C4 = 0.33

µF at VCC = 5 V ± 0.5 V.

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

temperature (unless otherwise noted) (see Note 4)

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

tPLH

Propagation delay time, low- to high-level output

CL = 150 pF, See Figure 3

150

ns

tPHL

Propagation delay time, high- to low-level output

CL = 150 pF, See Figure 3

150

ns

ten

Output enable time

CL = 150 pF, RL = 3 kΩ See Figure 4

200

ns

tdis

Output disable time

CL = 150 pF, RL = 3 kΩ, See Figure 4

200

ns

tsk(p)

Pulse skew‡

See Figure 3

50

ns

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

‡ Pulse skew is defined as |tPLH − tPHL| of each channel of the same device.

NOTE 4: Testing supply conditions are C1−C4 = 0.1

µF at VCC = 3.3 V ± 0.15 V; C1−C4 = 0.22 µF at VCC = 3.3 V ± 0.3 V; and C1 = 0.047 µF

and C2−C4 = 0.33

µF at VCC = 5 V ± 0.5 V.