MAX221 datasheet(3/8 Pages) MAXIM

3 / 8 page

+5V, 1µA, Single RS-232 Transceiver

with AutoShutdown

_______________________________________________________________________________________

TIMING CHARACTERISTICS

(VCC = +5V ±10%, C1–C4 = 0.1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)

ELECTRICAL CHARACTERISTICS (continued)

(VCC = +5V ±10%, C1–C4 = 0.1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)

CONDITIONS

UNITS

MIN

TYP

MAX

SYMBOL

PARAMETER

VCC = V+ = V- = 0, VOUT = ±2V

Driver loaded with 3k

Ω to ground

TA = +25°C, VCC = 5V

VCC = 5V, no hysteresis in shutdown

TA = +25°C, VCC = 5V

±10

±60

Output Short-Circuit Current

Ω

300

Output Resistance

±5

±9

Output Voltage Swing

Ω

Input Resistance

0.5

Input Hysteresis

1.7

2.4

Input Threshold High

0.8

1.2

Input Threshold Low

-25

Input Voltage Range

RL = 3kΩ to 7kΩ, CL = 50pF to 1000pF,

VCC = 4.5V

CONDITIONS

kbps

250

Maximum Data Rate

UNITS

MIN

TYP

MAX

SYMBOL

PARAMETER

TA = +25°C, VCC = 5V, RL = 3kΩ to 7kΩ,

CL = 500pF to 1000pF, measured from

-3V to +3V or +3V to -3V

(Note 1)

Normal operation

CL = 150pF

V/µs

Transition-Region Slew Rate

| tPHL - tPLH|

Receiver Skew

200

| tPHL - tPLH|

Transmitter Skew

200

Receiver Output Disable Time

300

Receiver Output Enable Time

µs

0.15

tPHL, tPLH

Receiver Propagation Delay

Note 1: Transmitter skew is measured at the transmitter zero crosspoints.

RECEIVER INPUT

TRANSMITTER OUTPUT

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