1µA Supply-Current, True +3V to +5.5V

RS-232 Transceivers with AutoShutdown

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3

ELECTRICAL CHARACTERISTICS (continued)

Note 2: C1–C4 = 0.1µF, tested at 3.3V ±10%. C1 = 0.047µF, C2–C4 = 0.33µF, tested at 5.0V ±10%.

200

Normal operation

200

Receiver Output Enable Time

Normal operation

ns

Receiver input to receiver output,

4

8.0

30

Transition-Region Slew Rate

V/µs

Ω to 7kΩ,

measured from +3V to

-3V or -3V to +3V

Transmitter Skew

200

ns

PARAMETER

MIN

TYP

MAX

UNITS

±25

Output Short-Circuit Current

±35

±60

mA

Output Resistance

300

10M

Ω

Output Leakage Current

µA

Input Threshold Low

0.6

1.2

V

±5.0

±5.4

Output Voltage Swing

V

Maximum Data Rate

120

235

kbps

Receiver Propagation Delay

0.3

µs

CONDITIONS

transmitters disabled

All transmitter outputs loaded with 3k

Ω to ground

ns

Receiver Output Disable Time

0.3

Input Voltage Range

-25

25

V

Input Hysteresis

0.3

V

Input Threshold High

V

Input Resistance

35

7

k

Ω

0.8

1.5

1.8

2.4

1.5

2.4

630

±5

Transmitter Output Voltage

V

T3OUT loaded with 3k

Ω to GND, T1OUT and

T2OUT loaded with 2.5mA each

MAX3221/MAX3223

MAX3243

200

1000

Receiver Skew

100

ns

MAX3221/MAX3223

MAX3243

100

500

RECEIVER INPUTS

TIMING CHARACTERISTICS

TRANSMITTER OUTPUTS

MOUSE DRIVEABILITY (MAX3243)