MAX3232

3V TO 5.5V MULTICHANNEL RS232 LINE DRIVER/RECEIVER

WITH ±15kV ESD PROTECTION

SLLS410I − JANUARY 2000 − REVISED JANUARY 2004

5

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 4)

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

VOH

High-level output voltage

IOH = −1 mA

VCC−0.6V 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

ri

Input resistance

VI = ±3 V to ±25 V

3

5

7

k

W

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

NOTE 4: Test conditions are C1−C4 = 0.1

µF at VCC = 3.3 V ± 0.3 V; C1 = 0.047 µF, 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 and Figure 3)

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

tPLH

Propagation delay time, low- to high-level output

CL= 150 pF

300

ns

tPHL

Propagation delay time, high- to low-level output

CL= 150 pF

300

ns

tsk(p)

Pulse skew‡

300

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: Test conditions are C1−C4 = 0.1

µF at VCC = 3.3 V ± 0.3 V; C1 = 0.047 µF, C2−C4 = 0.33 µF at VCC = 5 V ± 0.5 V.

PARAMETER MEASUREMENT INFORMATION

50

Ω

TEST CIRCUIT

VOLTAGE WAVEFORMS

0 V

3 V

Output

Input

VOL

VOH

tTLH

Generator

(see Note B)

RL

RS-232

Output

tTHL

CL

(see Note A)

SR(tr)

+

6V

t

THL

or t

TLH

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.

1.5 V

1.5 V

3 V

−3 V

3 V

−3 V

Figure 1. Driver Slew Rate